How to prevent precision CNC machining sleeve parts from deforming
The structural characteristic of sleeve parts is that the hole wall is thin, and thin-walled parts are often clamped during processing. Deformation due to the influence of cutting forces and thermal deformation. In this regard, Wemate has summarized some process measures to prevent parts from deforming:
(1) Rough machining and finishing machining are performed separately to reduce the influence of cutting force and cutting heat, so the deformation of the sleeve parts caused by rough machining CNC lathe processing can be corrected during the finishing process.
CNC lathe processing sleeve
(2) Reduce the influence of clamping force. The following measures are taken to reduce the influence of clamping force:
1. When radial clamping is used in precision CNC machining, the clamping force should not be concentrated on a certain radial section of the workpiece, but should be distributed over a large area to reduce clamping per unit area of the workpiece. Tight power. If the workpiece can fit in a split ring of suitable thickness, clamp it with the ring. Special jaws that increase the contact area are also available. When locating holes, open mandrel clamps should be used.
2. The position of the clamping force should be selected in a 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 from radial clamping to axial clamping.
4 Precision CNC machining produces rigid process bosses or process threads on the workpiece to reduce clamping deformation. During processing, the clamping jaws with special structure are used, and the flange is cut off at the end of processing.
(3) Reduce the effect of cutting force on deformation:
1. Increase the rake angle and main rake angle of the tool to make the cutting edge sharper during processing and reduce the radial cutting force.
2. Rough machining and finishing machining are separated so that the deformation of the sleeve parts caused by rough machining can be corrected during the finishing process and a smaller cutting amount is taken.
3. The inner and outer circular surfaces are processed simultaneously to offset the cutting force.
The heat treatment arrangement between rough machining and finishing can reduce the impact of heat treatment distortion. Sleeve parts generally produce larger deformations after heat treatment, which can be corrected during finishing, but attention should be paid to appropriately increasing the finishing allowance.
