How to improve the quality of precision machining?

How to improve the quality of precision machining?

How to improve the quality of precision machining? Find out the main factors causing the processing error (original error) is the key, but how to take the corresponding technical measures to control or reduce the influence of these factors? Let's understand how to effectively improve the quality of precision machining four methods:

One, and the error compensation method

This method is to artificially create a new original error, to offset the original error inherent in the original process system, so as to reduce the processing error, machining accuracy.

Two, the error transfer method

In essence, this method is to transfer the geometric error, force deformation and thermal deformation of the process system to the direction that does not affect the machining accuracy. For example, for the multistation process with division or transposition or the process of rotating knife frame, the error will directly affect the machining accuracy of the surface of the parts.

Three, the error homogenization method

This method uses closely related surfaces to modify each other, correct each other, or process them using mutual benchmarks. It can make those local large errors more evenly affect the whole processing surface, so that the processing error transmitted to the surface of the workpiece is more uniform, so the processing accuracy of the workpiece is greatly improved accordingly.

Four, direct error reduction method

This method is a more widely used basic method in the production. This method is to directly eliminate or reduce the main original error factors affecting the machining accuracy. For example, the turning of the slender shaft bends the work due to the influence of force and heat. Now the "large straight knife reverse cutting method" is adopted, which basically eliminates the bending caused by the cutting force. supplemented by spring top, can further eliminate the harm of thermal elongation.

Precision machining