How to prevent deformation of precision CNC machining sleeve parts

The structural feature of the sleeve part is the thin wall thickness of the hole, which is often clamped during processing. The effects of cutting forces and thermal deformation can cause deformation. In this regard, we have summarized some technical measures to prevent deformation of parts:

How to prevent deformation of precision CNC machining sleeve parts

Roughing and finishing are performed separately to reduce the effects of cutting force and cutting heat, so the deformation of the sleeve parts produced by the roughing CNC lathe can be corrected during the finishing process.

In order to reduce the impact of clamping force, the following measures have been taken during processing:

When precision CNC machining uses radial clamping, 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 a split ring of appropriate thickness, clamp it with the ring. Special jaws with increased contact area can also be used. When positioning holes, use an open spindle clamp.

The position of clamping force should be selected on rigid parts to improve the deformation of thin-walled parts under the effect of clamping force.

Change the direction of the clamping force and change the radial clamping to the axial clamping.

Precision CNC machining will produce rigid machining bosses or machining threads on the workpiece to reduce clamping deformation. It is clamped with a special structured jaw during processing, and the flange is cut off at the end of processing.

Reduce the influence of cutting force on deformation:

Increase the tool lead angle and main rake angle to make the cutting edge sharper during machining and reduce the radial cutting force.

Separate roughing and finishing to correct the deformation of sleeve parts caused by roughing and reduce the amount of cutting during finishing.

Simultaneous machining of inner and outer circular surfaces to offset cutting forces.

The heat treatment arrangement between roughing and finishing can reduce the effect of heat treatment deformation. After heat treatment, the sleeve parts will usually deform greatly, and can be corrected during finishing, but pay attention to appropriately increase the finishing allowance.