As we all know, the machining of precision parts is called precision precisely because of its very high processing technology and technical requirements. The machining accuracy of precision parts includes the accuracy of position, size and shape.
       The rotation and runout of the machine tool spindle will cause certain errors in the machining accuracy of the parts. The inaccuracy of the machine tool guide rail will also lead to the shape error of the precision parts. At the same time, the transmission parts will also cause workpiece machining errors, which is also the most important factor for workpiece surface errors.

      Different types of tools and fixtures also have different effects on the accuracy of the machined workpiece. In the process of machining and cutting, due to the change of the position of the force point, the system will be deformed, resulting in differences, and the accuracy of the workpiece will also have different degrees of error. Different cutting forces also affect workpiece accuracy.

     The error caused by the thermal deformation of the process system. During the machining process of the machine, the process system will produce a certain thermal deformation under the action of various heat sources. The deformation of the process system caused by heating often affects the accuracy of the workpiece. The thermal deformation of the machine tool will cause the workpiece to deform. Tool deformation caused by heating can have a large impact on the workpiece. The workpiece itself is deformed by heat, mainly during the cutting process.