Precision parts processing and manufacturing not only need the accuracy and stability of the machine tool and the accuracy of the tools and fixtures to ensure, but the CNC hardware parts processing technology needs to adopt ideal processing principles and precise forming movements in order to achieve the precise surface of the processed parts. However, in actual work, it is difficult to realize the precise mechanical numerical control machining process principle. In order to realize ultra-precision turning, the cutting amount must be optimized, so it is necessary to predict the surface roughness to be obtained. Through the study of the analysis model theory of factors affecting surface roughness, further research on machine tools, unit parts, cutting tools, cutting mechanisms and cutting processes can be carried out.

    CNC hardware parts processing manufacturers analyze that there are many factors that affect the quality of the processed appearance, such as the cutting performance of the added material, the accuracy of the spindle movement, the accuracy of the slide movement, natural vibration and vibration isolation, cutting tools and cooling, cutting parameters, and environmental conditions. There is a big gap between the ideal value and the pursuit of precise theory, which will often seriously affect the processing efficiency and fail to achieve the expected economic benefits.

    The main factors affecting the cold work hardening of CNC lathe parts are as follows:

    1. Factors of the processed material: the hardness of the processed material is small, and the greater the degree of cold work hardening of the material with greater plasticity.

    2. The shape factors of the tool: the rake angle of the tool, the fillet of the cutting edge and the amount of wear behind the tool have a great influence on the cold work hardened layer. When the rake angle decreases and the wear on the cutting edge and the back increases, the depth and hardness of the cold work hardened layer also increase.

    3. Cutting parameters of CNC hardware parts processing: the change of cutting speed and feed has a great influence on cold work hardening. When the cutting speed increases, the contact time between the tool and the precision parts processing workpiece is short, the degree of plastic deformation is small, and the hardened layer and hardness are reduced. As the feed speed increases, the degree of plastic deformation increases and the degree of surface cold work hardening increases.