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.