What are the factors that affect machining accuracy in precision parts processing

A complete system composed of machine tools, fixtures, workpieces, and cutting tools in the field of precision parts processing is called a process system. During the machining process, the relative position between the workpiece and the tool determines the size, shape, and position of the part being processed. Therefore, the issue of machining accuracy also involves the accuracy of the entire process system. The various errors of the process system will be reflected in different ways and programs during the processing process as geometric errors of the processing system. According to the nature of process system errors, they can be summarized as geometric errors of the process system, errors caused by force deformation of the process system, and errors caused by internal stress in the workpiece.

In the field of precision parts processing, geometric errors caused by process systems include principle errors of machining methods, geometric errors of machine tools, adjustment errors, manufacturing errors of tools and fixtures, clamping errors of workpieces, and errors caused by process system wear.