How to improve the quality of precision machining? It is a link to find out the main factors (original errors) that cause machining errors, but how to take corresponding technological measures to control or reduce the impact of these factors? Now let's find out how to effectively improve the quality of precision machining in four ways:
1、 Error compensation method
This method is to artificially create a new original error, which can offset the original error inherent in the original process system, so as to reduce the processing error and processing accuracy.
2、 Error transfer method
This method essentially 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 using an indexing tool holder, the indexing and conversion errors will directly affect the machining accuracy of the relevant surfaces of the parts.
3、 Error averaging method
In this method, surfaces that have intimate connection with each other are mutually corrected, or processed according to each other. It can make those local large errors affect the whole machining surface more evenly, so that the machining errors transmitted to the workpiece surface are more symmetrical, so that the machining accuracy response of the workpiece is greatly improved.
4、 Direct error reduction method
This method is a basic method widely used in production. This method is to find out the main original error factors that affect the machining accuracy, and then try to eliminate or reduce them directly. For example, the turning of slender shafts will cause bending deformation due to the influence of force and heat. Now, the "big straight cutter reverse cutting method" is adopted to basically eliminate the bending caused by the cutting force. With the help of the spring center, the harm of thermal elongation can be further eliminated.
