How to use a lipstick mold

KOS is a professional manufacturer of lipstick mold .
If you have any problems, welcome to contact sales@lipstickmolds.com, we will help you anything!---lipstickmolds.com

How to Get All-natural Homemade Lipstick?

Compared with conventional lipstick, all-natural homemade lipstick is a personalized safe lipstick that free from harmful chemicals. Making lipstick yourself reduces makeup costs and allows you to create a rainbow of customized colors that hard to find in market. Using natural materials to make a lipstick by yourself is a safe and cost-effective way. Follow my suggestions, you will easily get a distinctive lipstick.

► Prepare base supplies:

1. A set of lipstick mold kit. (3 parts)

2. Base recipe: (just made it by eyeballing the amounts)

    ① 1 spoon organic white beeswax pearl;

    ② 1 spoon shea butter, mango butter or avocado butter, which helps the lipstick roll on smoothly;

    ③ 1 spoon oil, such as almond oil, extra virgin olive oil, or jojoba oil. 

    All the ingredients mentioned above working together could create a smooth, clear lipstick that is very moisturizing and protective. Lip balm, lipstick or chap stick can be made in this way which is safe for us on the lips and skin. 

3. Optional pigment to create color lipstick, red, brown or other colors;

4. Tools: 1 measuring spoon, Q-tip, 1 microwave-safe bowl, PVC card, upper mold remover(optional), empty lipstick tube.

► Assemble mold

Before you begin to assemble the lipstick mold, clean mold inside by Q-tip with a little oil, in order to avoid dust or dirty things. Then assemble mold kit(including 3 parts).

► Melt the base ingredients together

Put the lipstick base ingredients together in a microwave-safe bowl. Stir the ingredients well to make sure they are thoroughly mixed.

► Adjust lipstick color

Choose a lipstick color, and mix with the ingredients. There are many natural substances that can be applied to create a range of red, pink, brown, and orange hues. Here are some options:

1. For a red lipstick, use beet root powder or crushed beet chips;

2. A reddish-brown color, use cinnamon;

3. A deep brown hue could be reached by adding cocoa powder.

► Melt pigment and ingredient in microwave

    Mix the adjusted color with the ingredients. Stir the ingredients well to make sure they are thoroughly incorporated. Then place it in the microwave to heat the mixture for around 30 seconds till they are melted. Control the temperature in a moderate degree, neither too hot nor too cool.

► Pour liquid into mold

Gently pour the mixture liquid into lipstick mold. Wait for about 2-3 hours till it is cooling and becoming solidification.

► Scrape and move out the upper cover

    Scrape off the residual bulge by PVC card. Next is to move off the upper cover. If you are not professional and skillful, maybe you will need the help of upper mold remover.

   

► Fill empty lipstick tube

Upside down the empty lipstick tube, and fill the lipstick into tube. Then you will get a whole all-nature homemade lipstick 

   

If you have special requirement of the caliber or the shape of lipstick, please contact us for custom-made. And we also have some lipstick in stock, feel free to consult us by email sales@lipstickmolds.com.

The use and maintenance of ball screw

With the wide application of CNC machine tools and other automatic control equipment, as energy-efficient, precision transmission ball screw use more and more.

Correct use and maintenance it is often encountered. In all kinds of mechanical equipment, the installation of ball screw, must pay attention to the following matters:

1, The ball screw is precision transmission device, must be lubricated. Recommend the use of potassium soap grease and 1 ~ 3 turbine oil lubrication in the nuts.

2, The ball screw like the rolling bearing, mixed with dust and foreign matter, will reduce the service life. Therefore, must use the screw protective cover to protect. At home and abroad all kinds of ball screw most parts have been equipped with a labyrinth seal ring, to prevent dirt from entering the ball screw body. In addition, use in the places of metal filing easily enter screw, should also consider the use of screw protective cover in the screw length protection.

3, Because of the special structure of the ball screw nut, should not bear radial load, in order to avoid screw bending, affect the transmission accuracy and flexibility of movement, reducing service life. Therefore, when installed, with particular attention to the axial lead of the screw and nut seat moving trajectory of the parallel, and the central axis of the screw bearing should be consistent with the central axis of the nut seat.

4, The screw is installed on the device, be careful not to separate the screw and nut, to avoid ball prolapse. Do not knock the ball screw in installation, with particular attention to the protection of the ball catheter, because of its thin wall, collision deformation will make the ball flow restriction.

Source: http://www.machineballscrew.com Ball Screw Use And Maintenance.

Precision high-speed ball screw selection matters need to pay attention

The high speed of linear servo feed system is a system engineering, and each link in the system must meet the requirements of high speed transmission.

Inversely proportional to the moment of inertia of the ball screw feed system and the system's maximum processing speed, in order to improve acceleration, the system should make finite element analysis and CAD optimized design, under the premise of meet the dynamic and static stiffness, reducing the number of parts, optimize parts parameters and make it high-strength, lightweight.

To choose the precision ball screw assembly matched high speed rolling linear guide at the same time. For example, Japanese THK's SHS Quartet and other load series, SNR, SNS high stiffness heavy duty series, SSR ultra high-speed series, the line speeds up to 200m/min or more. German INA's drum-shaped roller linear guide according to user requirements can also configured with "RUDS" damping sliding seat, the amplitude decreased to 1/30 of the original, noise decreased significantly to meet the high-speed, high-precision, heavy cutting requirements.

To attach great importance to the installation accuracy of precision high-speed ball screw assembly on the machine tool, it plays an important role in improve the critical speed Nc, positioning accuracy, improve stability at high speeds, reducing noise and so on. Screw both ends using pre-stretching high stiffness support structure, to ensure strictly screw both ends bearing and ball nut center "three coaxial". Should use ball screw special high rigidity thrust angular contact bearings.

Make full use of ball screw "synchronization" characteristic, high speed machining centers installed in pairs of high-speed precision ball screw assemblies, is the effective measure to improve the stability of the servo feed system at high speed, improved dynamic characteristics. For example, Japanese Makino Milling Machine production the A55E type of horizontal high-speed machining center and Niigata Iron Works of SPN50-H0 type horizontal high speed machining center and Toyoda Machine EV33 vertical high-speed machining center, have adopted the double motor double screw drive mode.

In the servo feed system, to configure the brake device, the flexible buffer, the self-locking in vertical transmission, and so on.

In the purchase and acceptance of precision high-speed ball screws, and to differentiate the general large lead ball screw, and require manufacturers to provide the ordered products operating speed, acceleration, precision, noise, temperature rise and other testing data. If you are using Si3N4 ceramic balls, you should check the Si3N4 ceramic balls accuracy, hardness, surface roughness, pressure-fed load test certificate. If the selection of strong cold hollow screw, should also check the straightness of the deep hole, the test results of the outer circle coaxiality. In order to ensure the reliability of the high-speed operation, and also view the screw shaft, nut, loop back device raw material and heat treatment inspection reports.

Source: http://www.machineballscrew.com Precision High Speed Ball Screw Assemblies.

Notes the use of linear guides

Linear Guides are precision parts, thus requiring the use of quite a cautious attitude, even with a high-performance linear guide, if used improperly, it can not achieve the expected performance results, and easy to make linear guide for damage. Therefore, the use of linear guide should note the following:

Prevent corrosion

Direct with the hands to pick up the linear guide, need to fully wash hands sweat, and coated with high-quality mineral oil for the operation, during the rainy season and summer with particular attention to rust protection.

Keep the environment clean

Keep the linear guide and the surrounding environment clean, even if the tiny invisible dust into the guide rail, will increase wear, vibration and noise of the guide rail.

Installation should carefully

When using and installing the linear guide should be careful, it does not allow a strong punch, not allow the use of a hammer to knock the guide directly, not allow pass the pressure through the rolling.

Installation tools appropriate

Linear guide using appropriate and accurate installation tools, try best to use of special tools, try to avoid using fabric and staple fiber such things.

Source: http://www.machineballscrew.com Ball Screw Linear Guides.

Linear guide rail use six don'ts

With the rapid development of China's industry, the use of linear guide rail is also becoming more common, so, what the do's and don'ts in the use of linear guide, how to solve some of the problems?

1, Linear guides do not run without lubrication. Linear guide before out of factory has filled with the lubricating oil, if you want to clean, first to be dry, then reraise lubricants.

2, Do not arbitrarily disassemble the linear guide parts, so as not to affect the accuracy and flexibility.

3, Please do not hammer with hard or sharp tools when installing linear guide rail.

4, After installation, don't let any object speeding on the impact, if the plastic parts break, the ball will be rolled out, the slider will fall.

5, Do not arbitrarily set the line guide with the ball does not comply with the provisions.

6, Do not remove the slider from the linear guide rail, if necessary, it must first align the auxiliary linear guide rail, and then remove the slider.

Source: http://www.machineballscrew.com Ball Screw Linear Guides.

How to Select Ball Screw Correctly

1, With the load to determine the diameter. Motor performance parameters include the output torque, if it is equipped with a reducer should be calculated (considering efficiency), calculate how much thrust needed in the actual working conditions, ball screw sample (get from the manufacturers) has the load parameters (ie thrust parameters, general marked as dynamic load and static load, you can see the former), select the nominal diameter of ball screw.

2, With linear speed and rotation speed to determine the ball screw lead. Motor is determined to know the output speed, consider the maximum linear speed you needed, the motor speed (if equipped with a reducer and then divided by the reduction ratio) multiplied by screw lead is linear speed, which is greater than the required value.

3, According to the actual needs to determine the ball screw length (total length = working stroke + nut length + safety margin + installation length + connection length + margin). If you increase the protection, such as protective cover, the need to take protective cover expansion ratio (usually 1:8, that is the maximum elongation of the protective cover divided by 8) into account.

4, According to the actual needs to determine the ball screw precision. General machine selection C7 or less, machine tools to choose the C5 more (corresponding domestic standards generally P5 ~ P4 and P4 ~ P3 level, see specific samples).

5, With installation conditions and dimensions structure and others to determine the ball screw nut forms (nuts have many structures, different nuts have slightly different structure sizes, selection depending on the situation, it is recommended not to choose too special, in case something wrong that repair or replace parts of nowhere).

6, Select the installation method (end). This installation part can be designed yourself, or buy the ready-made, with standard mounting base. Design yourself pay attention to the stress state, bearing the best choice for 7000 or 3000 series, because the screw working is mainly bear the axial force, radial force to try to avoid.

7, Consider the guide part and the installation capacity. Recommended the guide part matched with ball screw and select ball linear guides, of course the linear axis and linear bearing of collocation is the relative economic choice.

Source: http://www.machineballscrew.com Ball Screw Bearing Assemblies.

Three elements of ball screw selection

Ball screw is a precision and highly efficient transmission components, in modern industrial production, the use of ball screw has already been seen everywhere. It is a high speed, reversible, long life, high rigidity, zero clearance, synchronized, high sensitivity, easy maintenance and other advantages conquered the loading and unloading. So, in production, how to choose a more suitable ball screw?

First ball screw nominal model selection, the nominal model mainly refers to the nominal diameter and lead of the screw. The initial phase of the design can be based on the technical requirements of machine tools (mainly including load, rapid traverse speed, servo motor speed, etc.) of the initial selection of ball screw model, and then calculate and check, the calculation results meet the design requirements can be finalized.

Second is the selection of lead precision of ball screw, in the ball screw accuracy parameters, the influence of the lead errors on the machine tool positioning accuracy is the most obvious. Usually in the initial design of the screw of any 300mm stroke change quantity V300P should be less than the target set positioning accuracy of the 1/3 ~ 1/2, to determine in the final accuracy checking. Ball screw precision is divided into seven levels, ie, 1-7 and 10, level 1 is the highest accuracy, decrease progressively in turn.

Finally is the selection of ball screw support, in the design of CNC machine tools, the ball screw support typically by selecting the "fixed - support" or "fixed - fixed." "Fixed - support" is relatively easy to assemble and has good rigidity and high accuracy, mainly used in medium speed, larger stroke, heavier load environments; "fixed - fixed" is relatively difficult to assemble, good rigidity, high precision, often used in high-speed, large stroke, heavy load environment.

Source: http://www.machineballscrew.com Ball Screw Assembly.

Ball screw technical requirements

Ball screw in general need to put forward what technical requirements?

Basically has the following several aspects

1, Geometric precision, including stroke deviation test, jitter check, positional tolerance test. Stroke deviation includes targeted stroke tolerances, effective stroke compensation value, the amount of variation within the effective stroke, stroke deviation within one revolution. Jitter deviation includes thread diameter of the axis radial runout, journal circle runout, shaft shoulder circle runout, mounting end face with nut preload of axis circle runout.

2, Material and heat treatment.

3, Magnitude of preload, pre-tensioning load.

Ball screw produced by professional manufacturers, if no special requirements, as long as its accuracy class and geometric dimensioning is given.

Ball screw structure:

The ball screw nut is rotary motion convert into linear motion of commonly used transmission device. With the balls rolling instead of the sliding of ball screw nut, the friction is small, has good performance.

The composition of ball screw: mainly consists of the screw, nut, ball and circulators, labyrinth seals, oil hole and other components. How it works: the screw and nut processed with arc spiral groove, when they suit together to form a spiral raceway, and filled with balls in the raceway. The ball is rolling along the raceway, and for the cycle of circular motion by a circulator. Both ends of the circulator also played the role of stopper beads, to prevent the ball from falling out along the raceway.

Source: http://www.machineballscrew.com Ball Screw And Parts.

Methods for preventing screw deformation when processing screw

Prevent cutting force is too large and cutting heat is too high

1, Reasonable choice of screw cutting parameters, turning tool materials and geometry angle and so on.

2, Coarse, fine screw machining separate, for the complex structure, higher precision requirement screw workpiece, can be divided into rough machining and finish machining two processes to machining, rough machining allowance large, choose a larger cutting parameters, and applying a larger clamping force, so the screw workpiece deformation is also large, finish machining allowance, cutting force and clamping force are small, so screw workpiece deformation is smaller, deformation generated by rough machining through finish machining obtained higher processing precision.

3, Cantilever screw workpiece clamping, turning, screw workpiece clamping on the lower plane positioned faceplate, poor rigidity and stability of screw workpiece, cutting forces generated when turning make the cantilever portion downward bending deformation, in screw workpiece cantilever bottom using the adjustable support pin support the workpiece, in order to increase the rigidity of the screw workpiece.

Correct clamping screw workpiece

1, Reduce clamping force while finish machining, for general accuracy requirements and rigidity intersects screw workpiece, in order to improve productivity during processing, may not have to be divided into rough machining and finish machining two processes, after rough turning appropriate to relax the screw workpiece to reduce the clamping force and then finish turning, which can reduce the deformation of the screw workpiece.

2, If the screw workpiece and fixture locating surface contact area is unmachined surface, then generally only choose three points of contact, the distance between the three points should be as large as possible, the clamping force should as far as possible on the contact points, to ensure stability and reduce the deformation when clamping screw workpiece.

3, If the screw workpiece and fixture surface contact area is machined surface, then must pay attention to the contact surface of the straight, before screw workpiece clamping, should carefully check whether the screw workpiece and fixture locating surface bulges or burr, when necessary, can use flat painting to check, because the middle position with bulge or cutting, will produce processing error and cause the screw workpiece deformation.

Source: http://www.machineballscrew.com Fine Ball Screws.

Guide rail design of seven basic requirements

1, Guidance accuracy

The guidance accuracy is the accuracy of the motion trajectory of the moving member along the guide surface. The main factors that affect the guidance precision are the geometrical accuracy of the guide bearing, the structural type of the guide rail, the contact accuracy of the guide rail, the surface roughness, the rigidity of the guide rail and the support member, the oil film thickness and the oil film rigidity of the guide rail, and the thermal deformation of the guide rail and the support member.

The geometric accuracy of the linear motion guide rail generally includes: the vertical plane and the horizontal plane of the straightness; the parallelism between the two rails surface. The geometric precision of the guide rail can be expressed by the error of the total length of the guide rail and the error of the unit length.

2, Precision maintenance

Precision maintenance is the ability to maintain the original geometric accuracy in the guide rail work process. The precision maintenance of the guide rail is mainly determined by the wear resistance of the guide rail and its dimensional stability. The wear resistance is related with the guide rail assembly material matching, the force, the processing precision, the lubrication way and the protective device's performance and other factors, in addition, the guide rail and the support part residual stress also can affect the precision maintenance of the guide rail.

3, Motion sensitivity and positioning accuracy

Motion Sensitivity is the smallest stroke that the motion member can achieve; positioning accuracy means the capability of movement member can stop as required in the specified location. Motion sensitivity and positioning accuracy are related with the guide rail type, friction characteristics, motion speed, transmission rigidity, motion component quality and other factors.

4, Motion stability

Motion stability of the guide rail is the performance of guide rail does not occur creeping phenomenon at low speed movement or trace movement. Stability is related to the guide rail structure, guide rail assembly material matching, lubrication condition, lubricants properties and the guide rail movement of the drive system stiffness and other factors.

5, Vibration resistance and stability

Vibration resistance is the ability to withstand the forced vibration and impact of the guide rail assembly, while stability refers to the performance of self-excited vibration does not occur at a given operating conditions.

6, Rigidity

Ability to resist deformation of the guide rail. Deformation will affect the relative position and orientation between the components, which is particularly important for precision machinery and instruments. The deformation of the guide rail includes guide rail body deformation and the guide rail assembly contact deformation, both should be considered.

7, Structure technology

Structure technology refers to the degree of difficulty in the process of the guide rail assembly (including all parts of the rail). In the premise of meeting the design requirements, should try to make it easy manufacturing and maintenance, and low cost.

Source: http://www.machineballscrew.com Ball Screw Linear Guide.

Development trend of ball screw technology and equipment in the world

The production of ball screw technology is widely used, and it has promoted the development of production ball screw technology machine, but also put forward higher requirements. At present, the international development trends of ball screw technology and equipment is mainly reflected in the following aspects.

1, Production Automation: Automated ball screw technology machines not only improve productivity, but also has the advantages of safety and health. Japanese company production typ-b series rotary vacuum chamber packaging machine is a very high degree of automation of multi-station packaging machine. The machine has filling and vacuum two turntable, filling turntable has six stations, complete for bags supply, feeding, pouring the pre-sealed and the package sent to the vacuum turntable; vacuum turntable has 12 stations (vacuum room), complete evacuation and sealing, product output and other processes, the production efficiency of up to 40 bags/min, mainly used for packaging of soft canned food.

2, Using new technologies: on packaging methods, extensive use of inflatable packaging substituted ball screw technology, the research inflatable ingredients, packaging materials and inflatable packaging machine in three areas closely together; in control technology, increased use of computer technology and micro electronics technology; in the seal, the application of heat pipes and cold sealing technology; advanced equipment is mounted directly on the ball screw technology machine, such as the computer control of coarse grain high precision combination scale; in the rotary or ball screw technology machine, application of advanced high-speed circular surface of the cam indexing machinery. Using all these new technologies, so that the ball screw technology machines more efficient and intelligent.

3, Single machine multifunction: to achieve multi function on a single machine, can easily expand the scope of use. The multi function of a single machine is accomplished by using the modular design. Through the transformation and combination of different functional modules, the production of ball screw technology machine suitable for different packaging materials, packaging mouth, packaging requirements. Representative products of German Bosch Company owned the Hesser factory production of multi station bagmaking ball screw machine, set bagmaking, weighing, filling, vacuum pumping, sealing and other functions in one, convenient and quick.

4, Assembly the production line: when the needed functions are more and more, all the functions focus on a single machine will make the structure becomes very complex, operation and maintenance is not convenient. By this time, the several machines with different functions and matching efficiency can be composed into more complete production line, to complete more complex packaging process. Ball screw technology production line, ball screw technology system, and other models belong to this type.

Source: http://www.machineballscrew.com Ball Screw Assembly.

Methods of improving transmission rigidity of ball screw

In the servo control system of CNC machine tools, the transmission rigidity is one of the main determinants of the high speed positioning repeated accuracy. The transmission rigidity and accuracy are mainly determined by the rigidity of the transmission ball screw and its supporting structure.

Methods for improving the transmission rigidity of the CNC machine tools ball screw:

1, Using appropriate coupling

The large torque and wide speed regulation DC motor generally can be directly coupled with the ball screw, which can be used the conical clamping ring anti-backlash coupling or flexible coupling, in order to eliminate the transmission gap and improve the transmission rigidity. If the use of small inertia DC motor, the need to gear deceleration, the large gear can be directly mounted on the ball screw end.

2, Improve the rigidity of the ball screw and its support

Integrated tension and compression of the ball screw transmission mainly composed of ball screw tension and compression rigidity, support rigidity, nut rigidity and others three parts. Tension and compression rigidity of the ball screw can be improved by using the bearing manner of axial fixed at both ends. And over the entire operating stroke range smaller stiffness change, which is favorable to reduce the positioning error caused by the change of the transmission rigidity. This support way when the nut is in the middle position the stiffness minimum, but still 4 times of the minimum stiffness of one end axial support.

Support stiffness includes bearing stiffness itself and bearing seat stiffness, according to experience, in addition to tension and compression stiffness of the ball screw, the bearing stiffness is one of the weak links. The stiffness of the bearing itself can using Contact Angle of 60 degrees of thrust angular contact ball bearing, double thrust angular contact ball bearing, ball bearing and thrust roller bearing and other measures to improve the axial rigidity of the bearing. To enhance the rigidity of the support seat, the design should pay attention to avoid using the narrow and thin gaskets and middle spacer sleeve. To improve the contact stiffness of the bearing seat, the mating surfaces must be grinding. And in the direction of the force arranged appropriate reinforcing rib.

3, Ball screw nut assembly preload and ball screw prestretching

Ball screw nut assembly preload general use various forms of double nut mechanism and ball screw nut with preload. Require the preload value should be 1/3 times greater than the maximum axial force.

Ball screw prestretching can compensate for ball screw thermal deformation and improve the tension and compression stiffness of the ball screw. General require the prestretching force should be greater than the 0.35 times of maximum working load.

Source: http://www.machineballscrew.com Ball Screw Nut Assembly.

High-speed ball screw design

Ball screw driving speed v = Ph × N (Ph is lead, N is screw revolving speed), thus there are two ways to increase the driving speed: one is to improve the revolving speed of the screw, and the second is to use large lead ball screw. Increase the revolving speed, subject to the do, N values (do is the ball screw nominal diameter). The international general screw revolving speed is less than 70000r/min.

When the screw speed increases, the nominal diameter must be reduced and the excessive increase speed will cause screw fever, resonance and other issues; nominal diameter too small can also cause the system poor rigidity, deformation, affect the machining accuracy, and the current servo motor only the highest speed to 4000r/min. When the lead is too large, not only increases the difficulty of manufacturing the ball screw, precision is difficult to improve, reducing the lead screw bearing, but also increases the servo motor starting torque. Thus, when designing high-speed ball screw to reasonably select the screw speed, nominal diameter and lead.

CNC machine tools ball screw design structure: the outer loop intubation type, the inner loop inverter type. Since the high-speed ball screw lead is larger, if use the inner loop structure, the inverter size is longer, reduce the number of bearing balls, and the ball fluency is poor at high speed, is not suitable; and the outer loop intubation type structure is simple, large bearing capacity, without restriction of lead. Therefore, it was selected as the high-speed ball screw structure.

There are three main preloaded ways of outer circulation ball screw: increased ball diameter, displacement lead and gaskets. High-speed ball screw design, lead, thread, loop selection are very important, directly affect the ball screw speed, load, life and so on.

Source: http://www.machineballscrew.com High Speed Ball Screws.

Ball Screw Clearance

In order to guarantee the reverse transmission precision and axial rigidity of the ball screw assembly, the axial clearance must be eliminated. In addition to the individual with a single nut to eliminate the gap, the ball screw nut assembly usually use double nuts preload to eliminate clearance. The principle is: the use of two nuts relative axial displacement, so that the balls in the two ball nuts are in close contact with two opposite sides of spiral track, when using this method to eliminate the gap, should pay attention to the preload force can not be too large, too large preload will make the unloading torque increases, thereby reducing the transmission efficiency, and shorten life. Thus, generally require several adjustments to ensure both can eliminate the gap and flexible operation. In addition to nut preload in adjustment, it should also pay special attention to make the gap between screw mounting portion and driving portion as small as possible, and has sufficient rigidity.

Adjust the clearance of the ball screw, is to guarantee the reverse transmission accuracy and axial rigidity. When using preload method to eliminate axial clearance, should pay attention to the preload should not be too large, too large preload will make the unloading torque increases, reducing transmission efficiency, increase transmission assembly wear and shorten life. The methods commonly used in double-nut screw eliminate clearance are:

1, Double nut gasket gap adjustment type, changing the thickness of the gasket to make both internal and external nuts generate axial relative displacement.
Double nut gasket gap adjustment structure advantages and disadvantages: this kind of adjustment method can accurately adjust the preload, the structure is simple, high rigidity, reliable, but the adjustment is not convenient, raceway wear can not be adjusted at any time.

2, Spring automatic gap adjustment type: with the spring to produce the axial displacement between the two nuts. Its characteristic is in the use process can automatic compensate the gap due to the wear or elastic deformation, but its structure is complex, the axial rigidity is low, suitable for light loads application.

3, Tooth difference gap adjustment type, through the adjustment of the nut on the end of the external tooth relative to the internal tooth of the meshing angle to eliminate the gap.
Double nut tooth difference gap adjustment of the structure advantages and disadvantages: this kind of adjustment method can accurately fine adjust the preload, reliable, easy to adjust when the raceway wear. But the structure is complex, suitable for the precise positioning system needed to obtain the accurate preload.

4, Thread gap adjustment type, rotate adjusting nut 1, so that the axial displacement of the nut 2.
Double nut thread gap adjustment structure advantages and disadvantages: this kind of adjustment method structure is simple, easy adjustment, raceway wear can be adjusted at any time, but the preload is not very accurate.

Source: http://www.machineballscrew.com Ball Screw Nut Assembly Manufacturer.

Ball screw transmission characteristics

Transmission principle of ball screw
The principle of the transmission is driven by the servo motor, the screw to do high-speed movement, through the nut to drive the machinery fixed on the nut.

Ball screw transmission feature
Ball screw transmission mechanism between the screw and nut add the balls as intermediate element, so that the screw and nut sliding friction transmission changed into rolling friction transmission.

On the ball screw nut is formed with a spiral groove arc surface, the two arc spiral groove on the surface together to form the raceway. There are many balls in the raceway, therefore, is rolling friction between the screw and nut. In the nut 2 is equipped with blocking bead detector at both ends of the spiral groove, and the return pipeline for balls after get out of the nut body from one end of the helical groove, and back along the pipeline return to the other end of the raceway. Thus, when the ball screw relative to the nut rotation to do linear motion feed drive, the ball is in the spiral raceway circulated continuously scrolling.

Ball screw transmission advantages:

1, High transmission efficiency. Transmission efficiency of ball screw transmission is generally 90% to 98%, while the transmission efficiency of ordinary sliding screw transmission is 20% to 40%.

2, High transmission accuracy, stable movement, no crawling phenomenon. The ball screw transmission is basically rolling friction, the friction resistance is small, the friction force is almost no relationship with the speed of movement.

3, Reverse no idle stroke. The ball screw and nut can eliminate the axial clearance after being pre-tightened. In this way, there is no idle stroke when the reverse, can improve the axial transmission accuracy and axial stiffness.

4, Reversibility. Due to the small friction loss of the ball screw transmission, it can be converted from the rotating motion to linear motion, and it can be converted from the linear motion to rotating motion. Both the screw and the nut can be used as the active part, and can also be used as a follower.

5, Long service life. Because the friction loss of rolling friction is small, so the service life is longer. As the ball screw has the above advantages, as a kind of precision and energy saving transmission mechanism, the application of ball screw in precision machine tools, CNC machine tools is more common.

Ball screw transmission disadvantages:

1, High cost. Due to the higher processing precision of ball screw and nut and other components, lower roughness, so the higher manufacturing costs. Screw and nut on the spiral groove raceway to be ground forming surface, the process requirements are complex, difficult to manufacture.

2, No self-locking. In particular vertical screw, due to the inertia force of the self weight, moving parts after the transmission stopped can not be self-locking, need to add the braking device.

Ball screw adjustment
Generally not recommended by adjusting shims to adjust the preload, because the ball has been worn, it is best directly replace the ball. Specific replace how big the ball, depending on the screw specifications, of course, can be sent to a professional screw factory maintenance is the best. However, this only as a temporary emergency measure, the ultimate solution is still to buy a new screw.

Source: http://www.machineballscrew.com Ball Screw Assemblies Manufacturer.

Ball screw selection steps

Ball screw basic selection steps and the necessary research items are as follows.

1, Decide the use conditions

Based on the weight of the moving object, feeding speed, operation mode, the screw shaft speed, stroke, installation orientation (horizontal or vertical), life time, positioning accuracy.

2, Preselect ball screw specifications

Conditions of use, preselect accuracy level of ball screw (C3 ~ C10), the screw shaft diameter, pitch, total length.

3, Confirm basic security

● Allowable axial load
Confirm axial load in the allowable axial load range of screw shaft.

● Allowable Speed
Confirm screw shaft rotational speed within the allowable range of its speed value.

● life
Calculate the life time of the screw shaft, confirm the ensured life time required.

4, According to the performance requirements for discussion

To improve the precision positioning accuracy and the control responsiveness, the need for the following confirmation.

● screw shaft rigidity
● lifetime change caused by the temperature

Source: http://www.machineballscrew.com Ball Screw Assembly

Self-Lubricant ball screw features

Cost savings
No lubrication piping systems and equipment, oil change and waste oil disposal costs and save a lot of oil costs.

Significantly extend the maintenance cycle
Can be a long time to maintain the right amount of lubricating grease supply, significantly extend the maintenance cycle.

Easy to replace or supplement
Special structural design, without any tools can do the removable and supplement for oil storage device easily, without disassembling, restructuring screw group or machine structure, saving the cost of an oil change.

Optimum lubricating location
E2 self-lubricate ball screw lubrication points located inside the nut, with lubricating device uniformly coated on the screw surface of the ball rolling spiral groove, to achieve the best lubricating effect.

Flexible use and installation
Ball screw set in any direction can normally lubrication, no mounting orientation restrictions.

Clean and green
No oil leakage pollution and oil splashing danger when forced lubrication. Suitable for environments requiring higher cleanliness, with the concept of environmental protection.

Can choose the corresponding lubricating oil
Removable oil storage tanks can according to different use environments of ball screw loading the appropriate lubricants.

Special environment use
Such as dust environment, bad weather conditions and water environment, self-lubricat products with the use of grease, can achieve good lubrication effect.

Source: http://www.machineballscrew.com Reliable Ball Screw Supplier.

Characteristics and applications of ball screw

Characteristics of ball screw

Ball screw in the application has many advantages, such as high efficiency, reversibility, high rigidity, zero backlash and high precision lead, etc., compared with the traditional Actmix screw (ACME), ball screw add the balls between the nut and screw, conventional sliding friction drive replaced by the ball movement, so greatly reduce the friction loss, it helps to maintain high efficiency and high accuracy.

1, High efficiency and reversibility

Due to the screw shaft of the ball screw and the nut are point contact rolling motion, so the efficiency can be as high as 90%, so the movement torque is only one third of the conventional screw, ball screw in the thread shaped surface to take ultra-precision processing, in order to reduce the contact friction between the bead groove and steel ball. And the ball and the bead groove is point contact rolling movement, so it has advantages of high efficiency and low friction. Therefore, it can reduce the motor driving force requirements, and then reduce the costs.

2, Zero backlash and high rigidity

CNC, IT and semiconductor equipment for conventional screw requirements are zero backlash, minimal elastic deformation (high rigidity) and a high degree of smoothness. Ball screw using pre-pressure applied to achieve a full stroke high rigidity of CNC equipment, but too much of the pre-pressure will increase the operating torque, thus the increased frictional torque will produce heat and reduce the expected life, ball screw zero backlash and high rigidity characteristics precisely to solve this problem. It recommends that the pre-pressure does not exceed 8% of dynamic load.

3, High lead precision

High lead precision is the goal of ball screw consistent pursuit, imported grinding grade screw can ensure the needs of lead precision of all levels business users in the industry.

4, Life prediction

With respect to the life of transmission screw depends on the loss of the contact surfaces, ball screw depends on the material fatigue damage, the life expectancy of the ball screw is mainly based on the dynamic load. Factors affecting dynamic load depends on the accuracy of thread type, material properties and surface hardness.

5, Low starting torque and smoothness

Traditional screw because it is metal to metal contact between the surface, so in order to overcome the starting friction must use high starting torque, and the ball screw use the ball rolling contact, so just a small starting torque can overcome friction.

6, Low noise and mute

With the constant evolution of modern mechanical process as well as national laws and regulations on pollution control process, the requirements of the equipment operation are more and more stringent, how to reduce noise pollution is also one of the goals of the major companies in the production process of continuous pursuit.

Application range of ball screw

1, Precision machinery: grinding machine, drilling machine, milling machine, and so on.
2, CNC processing machinery: CNC machining center, CNC EDM, CNC wire cutting, CNC drilling, etc..
3, Industry machinery: automation machinery, injection molding machinery, printing paper machinery, special purpose machines, etc..
4, Transport unloading: handling equipment, load equipment, etc..

Source: http://www.machineballscrew.com High Precision Ball Screws.

Rolling Ball Screw

Rolling ball screw has the following advantages:

1, Productivity is improved. Cold rolling all kinds of regulating screw, its productivity compared with cutting methods, can increase 2 to 10 times, such as the original cutting T28 × 5 four furrow plow adjusting screw takes about 30 minutes, cold rolling process maneuver takes about 3 minutes.

2, Good quality. Turning thread shape, thread surface roughness in ▽5 ~ ▽6, and metal fibers are cut off: cold rolled screw, roughness up to ▽ 9, metal fiber tissue distribution improved only a little portion is cut off, the surface fiber compaction, so the hardness, intensity has increased.

3, Machine tools simple, production faster. We use two old five blow lathes and one old 10 feet lathe, respectively fit with four specifications of cold rolling box. When rolling screw, and only then square turret lathes, small carriage and large carriage detached, cold box mounted on the saddle rolling work can be done. The accuracy requirement of the machine tool is not high. Less investment and quick effect. Rolling different specifications screws, replace different cold rolling boxes. When stopped rolling, remove the roll box, the lathe can be used for other turning work.

4, Reduce labor intensity, easy and convenient operation, apprentice beginner can also operate.

5, Saving workpiece of metal material and tool material. Because before rolling the blank diameter is pitch diameter of thread, in theory, can save metal materials.

Ball screw from the process point of view is divided into two major categories of rolling and grinding screw. Rolling screw due to its higher degree of process automation features, very suitable for mass production, but also from a technical point of view, the consistency of the product is higher than the grinding screw, the currently P4 level and below ball screws mostly use of cold rolling process, and from environmental protection point of view, rolling screw has more advantages.

Foreign rolling screw of the process is relatively simple, mostly made using batch pressing rolling, and then made into different lengths of ball screw according to the needs. Most of the ball screw thread pressing process the same at home and abroad, later a single rolling screw process is slightly different.

Source: http://www.machineballscrew.com High Quality Rolling Ball Screw.

What are the common fault diagnosis and troubleshooting methods of ball screw?

Fault diagnosis and troubleshooting methods of ball screw:

Fault phenomenon: high machining parts roughness value

Cause of failure: the lubricating oil of the guide rail is not enough, causing the slide plate crawl
Troubleshooting method: add the lubricating oil, eliminate the lubrication failure

Cause of failure: ball screw with local scratch or abrasion
Troubleshooting method: replace or repair screw

Cause of failure: screw bearing damage, the movement is not smooth
Troubleshooting method: replace damaged bearing

Cause of failure: servo motor is not adjusted, the gain is too large
Troubleshooting method: adjust the servo motor control system

Fault phenomenon: large reverse error, processing accuracy unstable

Cause of failure: screw shaft coupling taper sleeve loose
Troubleshooting method: Re-tightening and repeated testing with dial indicator

Cause of failure: the screw shaft slide plate with pressing plate too tight or too loose
Troubleshooting method: re-adjust or repair, with the 0.03mm ruler not enter is qualified

Cause of failure: the screw shaft slide plate with the wedge too tight or too loose
Troubleshooting method: re-adjust or repair, the contact rate of more than 70%, with the 0.03mm ruler not enter is qualified

Cause of failure: ball screw preload is too tight or too loose
Troubleshooting method: adjust the preload, check the axial movement value, so that the error is not greater than 0.015mm

Cause of failure: the ball screw nut end face is not perpendicular to the joint surface, combination too loose.
Troubleshooting method: repair, adjust or padded handle

Cause of failure: screw pedastal bearing preload too tight or too loose
Troubleshooting method: repair adjustment

Cause of failure: large ball screw manufacturing error or axial movement
Troubleshooting method: automatic compensation of the control system can eliminate the gap, with the instruments to measure and adjust the screw movement

Cause of failure: inadequate or no lubricant
Troubleshooting method: adjust to each rail surface are lubricants

Source: http://www.machineballscrew.com Ball Screw Assembly Replacement Parts.

The difference between the stepping motor and servo motor

The difference between stepping motor and servo motor are:

1, Control accuracy is different; The more the number of phases and the number of beats of the stepping motor, the higher the accuracy, the servo motor depends on its own encoder, the more the encoder scale, the higher the accuracy.

2, Control mode is different; one is open-loop control, another is closed-loop control.

3, Different low frequency characteristics; stepping motor prone to the phenomenon of low frequency vibration at low speeds, when it works at low speed generally use damping technology or subdivision technology to overcome low frequency vibration phenomenon, the servo motor is running very smoothly, even at low speeds does not appear vibration phenomena. AC servo system has a resonance suppression function, can cover the insufficient of mechanical stiffness and the system has a function of frequency analysis (FFT), can detect mechanical resonance point convenient for system adjustment.

4, Different torque frequency characteristics; stepper motor output torque will decrease with the increase of the rotating speed, and AC servo motor is a constant torque output.

5, The overload capacity is different; the stepping motor generally does not have the overload capacity, but the AC motor has the strong overload ability.

6, Different operating performance; stepper motor control is open-loop control, the starting frequency is too high or the load is too large is easy to lose step or blocking phenomenon, stop with excessive rotating speed prone to overshoot phenomenon, AC servo drive system is the closed-loop control, the motor encoder feedback signal can be sampled directly by drives, the internal structure of the position loop and speed loop, generally does not appear stepper motor lost step or overshoot phenomenon, control performance is more reliable.

7, Speed response performance is different; stepper motor to accelerate from standstill to operating speed required hundreds of milliseconds, and AC servo system has better acceleration performance, generally only a few milliseconds, can be used for applications require fast start and stop control.

Source: http://www.machineballscrew.com Ball Screw Assemblies

Ball screw support base installation

End support structure is relatively simple, consisting of only bearing pedestal, circlip, bearings, in the support use ordinary radial ball bearing support the screw end. Because of this bearing only in the radial direction provide constraint, while the axial is free, without restrictions, since the thermal deformation when the screw length trace elongation, the support end can float axially trace ensure screw is still in a straight line state.

Installation method is as follows:

Install support base
(1) Install the fixed side to the screw.
(2) Insert the fixed side, tighten the lock nut, fixed with set piece and hexagon socket-head setscrew.
(3) Support side bearing with snap ring fixed to the screw shaft and install into the support side of the support base.
note 1) Do not disassemble the support unit.
note 2) When the screw shaft inserted into the support unit, please pay attention do not put the oil seal gasket flange ball turn.
note 3) When pressing pad block with the hexagon bolts, to prevent relaxation place hex bolts tightened after coated with adhesive.

Also when used under severe conditions, measures must be taken to prevent the relaxation of other parts, the details please contact the company.

The installation of table base
(1) When use the bearing mounted ball screw nut on the table, insert the nut and temporarily tighten.
(2) The fixed side temporarily tightened to the base.
At this time, set the table close to the fixed side support unit to align the axial center, adjust the table so that it can move smoothly.
(3) The table near the fixed side support unit, and align the shaft center, make the table back and forth several times, until the nut entire trip can smooth motion and temporarily tighten the support seat on the base. Confirm the accuracy and fully tighten the support unit.

Connected to the motor
(1) Install the motor bearings on the base.
(2) Use the coupling connect the motor and ball screw. (Note the installation accuracy)
(3) Please note full of test runs.

Source: http://www.machineballscrew.com KOS Ball Screw Manufacturer.

Ball Screw Instructions

1, When installing outer loop ball screw assembly, no percussion and removal conduit, so as to avoid the ball blockage, poor movement.

2, In the installation or use to avoid the ball nut separate from the screw groove surface, on the machine must be configured with overtravel protection device to prevent nuts emerge, especially in the high-speed operation of the occasion.

3, When installing the ball screw assembly, two ends of bearing seat hole with the nut seat hole to adjust to the best state. Forced installation is not allowed in the case non concentric.

4, Because the transmission efficiency of the ball screw is more than 90%, and can not be self-locking, in the need of self-locking occasion, the screw shaft must be equipped with the corresponding self-locking device.

5, In order to make the ball screw assembly flexible operation, to extend the service life, must be considered adequate lubrication conditions. KOS precision ball screw can choose lithium grease or kinematic viscosity (40 ℃) 28.5-74cts of lubricating oil. High-speed heavy load, please consider the forced lubrication cooling.

6, In order to ensure accuracy, please prevent dust and impurities from entering the ball screw.

7, The ball screw shall be assembled and maintained by the professional, and the user should contact the KOS manufacturing department when necessary.

8, Ball screw grinding machine, including lathe bed, workpiece headstock, workpiece tailstock, the workpiece is interposed between the workpiece headstock and workpiece tailstock, the workpiece headstock is connected with headstock worm gear assembly, the difference is the above lathe bed has lateral movement carriage, the lateral movement carriage by hanging wheel drive lateral ball screw assembly lateral movement, the lateral movement carriage has longitudinal movement carriage, the longitudinal movement carriage by longitudinal worm gear assembly drive the longitudinal ball screw for longitudinal movement, chrome optical axis of the longitudinal movement carriage is grinding device. The grinding machine is easy to operate, high processing precision, small size.

Precision efficient machine tools ball screw installation methods

By the product of on-site technical research, after repeatedly exploration and production verification, summed up a more reliable method of assembly process.

1, First, use the overall style special mandrel for screw base hole calibration, the positive and lateral parallelism with the reference guide at 0.01/1000 or less;

2, After fixation of the nut seat, using professional measuring fixture actual measured positive and lateral distance of reference guide with the nut seat pitch; then, the same use the overall style special mandrel for the alignment of bearing bore and the reference guide positive and lateral side parallelism is 0.01/1000 or less, using a dedicated measuring fixtures actually measure the positive and lateral side of the reference guide rail from the bearing pitch, requires the nut hole with a reference guide positive, lateral distance consistent, tolerance for 0.01; the bearing pedestal is fixed. This method uses overall style special mandrel, not only the length of the short, and the mandrel and the positioning sleeve into one, eliminating the fit gap between the mandrel and positioning sleeve, reliable ensures the parallelism of bearing hole, a screw nut seat hole and guide;

3, By measuring the actual distance, so that both ends of the bearing bore and nut seat hole concentricity has been a reliable guaranteed, thus reducing the deflection of the ball screw and radially offset load and improve the screw installation precision.

4, In addition, during the installation of ball screw, axial runout of the ball screw must be strictly controlled, the technology index will directly affect the ball screw feed system transmission position accuracy. According to the actual verification showed that: first, to install the bearing within the assembled servo motor end bearing, that plays a major role in the process of rolling screw drive, the axial runout of ball screw controlled between 0.015 ~ 0.02; then, install the bearing in the other end of the bearing assembly, so that the axial runout controlled in less than 0.01. This will effectively ensure the stiffness and accuracy of the ball screw feed system.

5, The ball screw shaft prestretching is also very necessary. To improve the ball screw feed system stiffness and accuracy, implement pre-stretch to the screw shaft is very effective, but due to the different sections of the screw shafts, and it is not easy to precisely set the temperature rise, so the pretension force calculation according to the literature only as a reference amount. In production is often the target value of the screw shaft having a negative direction of pre-stretching, to make to the machine tool table positioning accuracy of the curve nearly horizontal.

Source: http://www.machineballscrew.com precision ball screw assembly manufacturer.

The characteristics of two kinds of circulating ways of ball screw

Two kinds of common circulating ways of ball screw: outer loop and inner loop.

What is the outer loop? Balls in the loop process accidentally disengagement with the screw called outer loop; what is the inner loop? Always keep in contact with the screw called the inner loop. Each cycle of the ball is called a column, and the number of the lead in each ball cycle is called laps. Inner loop ball screw each nut have two, three, four, five columns and so on, each column only one lap; the outer loop each column has 1.5 laps, 2.5 laps and 3.5 laps, and so on.

1, Outer loop

Outer loop is a ball at the end of the cycle through the nut outer surface of the spiral groove or intubation tube returns to screw nuts and re-enter circulation. Outer loop ball screw nut according to ball circulation return ways mainly have cover type, intubation tube type and spiral groove type. Outer loop ball screw outer loop structure and manufacturing process complexity, the disadvantage is difficult to do raceway seams smooth, affect the smoothness of the ball raceway.

Cover type, processing a longitudinal bore in the nut, as the ball return passage, opened the backhaul mouth at both ends of the ball nut cover, the ball from this enter the return pipe, forming a loop.

Intubation tube type, it use elbow as a return pipe, this structure technology is good, but because the pipe protruding from the nut body, the radial size is larger.

Spiral groove type, it is outside the nut circular milling spiral groove, through holes drilled at both ends of the groove and the thread roller tangent to form a return passage, this structure is smaller than the radial size of the intubation structure but manufacturing is more complex.

2, Inner loop

Inner loop ball screw. Inner loop are using the inverter to achieve ball circulation, there are two types of inverter.

Cylindrical convex key inverter, its cylindrical portion embedded in the nut, the end has opened a reverse groove, reverse groove is positioned by a cylindrical outer surface and the upper end of round keys to ensure the alignment thread rolling direction.

Oblate insert inverter, the inverter is generally round flat key inserts, inserts embedded nut grooving, its end opened reverse groove, positioning with the outer contour of the insert. Two inverter comparison, the smaller the size of the latter, thereby reducing the radial dimension of nut and shorten the axial dimension. But the higher requirements of the outer contour of this inverter and nut grooving dimensional accuracy.

Source: http://www.machineballscrew.com Ball Screw Assemblies

Purchasing ball screw knowledge sharing

1, Production and processing problems: When the ball screw machining, screw pretension is in the assembly with screw two ends of the lock nuts according to requirements on the length of the bias of the screw applying the inevitable tension to adjust the screw positive and negative nuts of reverse tightness, the reason is that the screw in the operation of temperature rise, the thermal stress effect will stretch the screw, so the length of the screw becomes unstable. The goal is to effective eliminate the elastic variables of the component to achieve a stable activity precision. Otherwise, in the micro-feed when the damping force of carriage or workbench is greater than the elastic torque of the screw and nut, the workbench without displacement, with the feed screw and nut cumulative elastic torque exceeds the damping torque of table at this time the table impulsive displacement. Although the total amount of feed may not be affected, but the actual number of steps, each step of the feed rate and controller output errors, the consequences are seriously affecting the machining accuracy.

2, In order to determine the diameter of the ball screw load. Motor performance parameters in the output torque, if still with a reducer also included, calculate the actual working conditions of the necessary force, the choice of nominal diameter of ball screw.

3, When purchasing must determine the ball screw precision.

4, Asks the selected product manufacturers price, payment method and delivery time. This is very important.

Source: http://www.machineballscrew.com

Ball screw nut maintenance

Many machine tools due to ball screw nut transmission operation most frequent, various components often produce mechanical wear and poor lubrication, and therefore often appear decreased positioning accuracy, backlash is too large, mechanical crawling, serious bearing wear, excessive noise and other faults. When these failures occur, how to make the right diagnosis of ball screw and repair equipment in time. According to the KOS company's technicians introduction, to repair or inspect the first starting from the nut.

Before repairing the screw, first should check the bending of the screw, exceeds 0.1mm/1000mm must be straightened. Then measure the actual thickness of the screw thread, find the maximum abrasions, estimate the screw thread after repair process the thickness decrease, if more than the 15% ~ 20% of standard thread thickness, then the screw to be scrapped, can not be reused. In special cases, also allow to use the method of reducing the outer diameter of the screw to restore the standard thread thickness, but the outer diameter reducing amount shall not exceed 10% of the outer diameter of the original standard. For heavy-duty screw, if threaded portion needs repair, also checking its thickness decreases, the stiffness and strength whether can still meets the original design requirements.

The failures of ball screw and nut in operation mainly are:

1, Large backlash, poor positioning accuracy, processing parts size is not stable.

Ball screw assembly and its support system due to long-running generated wear gap will directly affect the transmission precision and rigidity of CNC machine tools. Failures generally have large backlash, positioning accuracy of instability and other issues.

2, Ball screw nut is not working smoothly, the noise is relatively large.

3, Ball screw nut support bearing wear or bearing pre-load washer with inappropriate.

4, Single nut of ball screw nut wear and clearance occurred; the nut flange plate and the working table are loosened, the gap is generated, the ball screw nut balls wear, double nut clearance occurred.

Original author: http://www.machineballscrew.com