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.