The structural feature of sleeve parts is that the wall thickness of the hole is relatively thin. During the processing of thin-wall sleeve parts, deformation is often caused by the influence of clamping force, cutting force and thermal deformation. In order to prevent deformation, some process measures are often taken
The roughing and finishing are carried out separately to reduce the influence of cutting force and cutting heat, so that the deformation caused by roughing can be corrected in finishing.
Reduce the influence of clamping force The following measures are taken to reduce the influence of clamping force in the process:
①When radial clamping is used, the clamping force should not be concentrated on a certain radial section of the workpiece, but should be distributed over a larger area to reduce the clamping force per unit area of the workpiece. If the workpiece can be installed in an open ring of suitable thickness, clamp together with this ring. Special jaws with increased contact area are also available. When positioning with holes, it is advisable to use an open mandrel for clamping.
②The position of the clamping force should be selected at the part with strong rigidity to improve the deformation of thin-walled parts under the action of the clamping force.
③ Change the direction of the clamping force, and change the radial clamping to the axial clamping.
④ Make a rigid process boss or process thread on the workpiece to reduce the clamping change.
It is clamped with a special structure of jaws during processing, and the convex edge is cut off at the end of processing.