How to Prevent the Deformation of Precision CNC Machining Sleeve Parts
The structural feature of sleeve parts is that the hole wall is thin, and thin-walled parts are often clamped during machining. Deformation caused by cutting force and thermal deformation. In this regard, Weimeite summarized some process measures to prevent part deformation:
(1) Rough machining and finish machining are carried out separately to reduce the influence of cutting force and cutting heat, so the deformation of sleeve parts produced by rough machining CNC lathe can be corrected in the process of finish machining.
CNC lathe processing sleeve
(2) In the process of reducing the impact of clamping force, the following measures shall be taken to reduce the impact of clamping force:
1 When radial clamping is used for precision CNC machining, the clamping force should not be concentrated on a certain radial section of the workpiece, but should be distributed in a large area to reduce clamping on the unit area of the workpiece. The power of tightening. If the workpiece can be installed in a split ring of appropriate thickness, clamp it with the ring. Special jaws that increase the contact area can also be used. Open spindle clamps shall be used for locating holes.
2 The clamping force shall be located at the part with strong rigidity to improve the deformation of thin-walled parts under the clamping force.
3 Change the direction of clamping force, and change the radial clamping to axial clamping.
4 Precision CNC machining produces rigid process boss or process thread on the workpiece to reduce clamping deformation. Clamping with jaws with special structure during processing, and cutting off the flange at the end of processing.
(3) Reduce the influence of cutting force on deformation:
1. Increase the rake angle and main rake angle of the tool to make the cutting edge sharper and reduce the radial cutting force.
2. The rough machining and finish machining shall be separated, so that the deformation of sleeve parts caused by rough machining can be corrected in the process of finish machining, and smaller cutting amount shall be adopted.
3 The inner and outer circular surfaces are processed at the same time to offset the cutting force.
The heat treatment arrangement between roughing and finishing can reduce the influence of heat treatment deformation. Generally, sleeve parts will have large deformation after heat treatment, which can be corrected during finishing, but attention should be paid to properly increase finishing allowance.