Talking about the process standard of precision parts processing

No matter what we do, we need a standard so that we can do a good job, especially when processing precision parts. According to the editor, on the lathe, the shape and size of the blank are changed by the rotary motion of the workpiece and the linear or curved motion of the tool, and processed to meet the requirements of the drawing.
Ordinary machine tools are becoming more and more difficult to meet the needs of processing fine parts. At the same time, the price of CNC machine tools is declining due to the improvement of production levels. CNC fine parts processing mainly includes ultra-fine turning, mirror grinding and grinding.
The primary condition for CNC fine parts processing is the accuracy of its process benchmarks. The benchmarks on mechanical drawings are all indicated by capital letters A, B, C, D, etc. with a specific circled reference symbol. When the face to which the reference symbol is aligned and the extension line of the face or the scale boundary of the face are defined, it indicates that the face is the reference. When the reference symbol is aligned with the scale line, it indicates that the centerline of the entity marked by the scale is used as the reference. The precision of craftsmanship mentioned for you above is a more abstract term.
Installation datum refers to the accuracy used to determine the position of a part in a component or product during installation. The measurement benchmark refers to the specification of the dimensions and orientation of the surface to be measured during part inspection. The positioning datum refers to the datum used for positioning the workpiece in the machine tool or fixture during processing. The process benchmark for CNC fine parts processing is the condition to ensure the production of high-quality parts. Please consult this site for details.