How to solve the problem of deformation of precision CNC turning parts in machining?

The deformation of precision CNC turning parts in machining is a difficult problem to solve. The reason for the deformation must be analyzed first, and then countermeasures can be taken.

Here is the content list:

l Reduce the internal stress of precision CNC turning parts

l Improve the clamping method of precision CNC turning parts

Reduce the internal stress of precision CNC turning parts

Natural or artificial aging and vibration treatment can partially eliminate the internal stress of precision CNC turning parts. Pre-processing precision CNC turning parts is also an effective process method. For larger precision CNC turning parts blanks, due to the large margin, the deformation after processing is also large. If the excess part of the blank is pre-processed and the margin of each part is reduced, not only can the processing deformation of the subsequent process be reduced, but also the internal stress of a part of the precision CNC turning parts can be released after the pre-processing is placed for a while.

Improve the clamping method of precision CNC turning parts

For thin-wall precision CNC turning parts with poor rigidity, the following clamping methods can be used to reduce deformation: (1) For thin-walled bushing precision CNC turning parts, if you use three-jaw self-centering chucks or springs The chuck is clamped in the radial direction. Once it is loosened after processing, the precision CNC turning parts will inevitably be deformed. At this time, the method of pressing the axial end face of precision CNC turning parts with better rigidity should be used. To locate the inner hole of the part, make a self-made thread through the mandrel, insert it into the inner hole of precision CNC turning parts, and use a cover plate to press the end face and tighten it with a nut. When machining the outer circle of precision CNC turning parts, clamping deformation can be avoided, so that satisfactory machining accuracy of precision CNC turning parts can be obtained. (2) When processing thin-walled thin plate precision CNC turning parts, it is best to use vacuum suction cups to obtain evenly distributed clamping force, and then process with a small amount of cutting, which can well prevent precision CNC turning parts from deforming. (3) Use the packing method. To increase the processing rigidity of thin-wall precision CNC turning parts, the medium can be filled in precision CNC turning parts to reduce the deformation of CNC turning aluminum parts during clamping and cutting. For example, pour precision CNC turning parts with a urea melt containing 3% to 6% potassium nitrate. Pre-processing precision CNC turning parts is also an effective process method. After processing, immerse the precision CNC turning parts in water or alcohol to dissolve the filling and pour it out.

Kunshan JST Industry Co., Ltd is a professional CNC machining parts manufacturer, which was applied to the field of medical, aerospace & aviation, electronics, security & safety, industrial equipment, and automotive. In addition, we could also manufacture the custom parts of casting & forging, metal fabrication, and plastic injection parts. Our company has adhered to the principle of Innovation, Diversity, and International.