1、 Error compensation method

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

2、 Error transfer method

In essence, this method transfers the geometric error, stress deformation and thermal deformation of the process system to the direction that does not affect the machining accuracy. For example, for a multi station process with indexing or indexing or a process with indexing tool holder, the indexing and indexing error will directly affect the machining accuracy of the relevant surface of the part.

3、 Error homogenization method

This method uses closely related surfaces to modify each other, or use each other as a benchmark for machining. It can make those local large errors affect the whole machining surface more evenly, and make the machining errors transmitted to the workpiece surface more uniform, so the machining accuracy of the workpiece is greatly improved accordingly.

4、 Direct error reduction method

This method is a basic method widely used in production. After finding out the main original error factors affecting machining accuracy, this method tries to eliminate or reduce them directly. For example, the turning of slender shaft produces bending deformation 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 cutting force. Supplemented by the spring center, the harm of thermal elongation can be further eliminated.

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