What is the machining process of non-standard parts?

The machining process specification is one of the process documents that specify the machining process and operation methods of parts. It is to write a more reasonable process and operation method in a prescribed form into a process document under specific production conditions. Used to guide production after approval.
The machining process regulations generally include the following: the process route of the workpiece processing, the specific content of each process and the equipment and process equipment used, the inspection items and inspection methods of the workpiece, the cutting amount, the time quota, etc.
For box parts, generally use the main hole as the rough reference to machine the plane, and then use the plane as the fine reference to machine the hole system; for shaft parts, generally use the outer circle as the rough reference to machine the center hole, and then use the center hole as the fine reference to machine the outer circle , End face and other surfaces. If there are multiple precision benchmarks, the processing of the base surface and the main surface should be arranged according to the sequence of benchmark conversion and the principle of gradually improving the processing accuracy.
For workpieces such as boxes, frames, rods, etc., the plane should be processed first, and then the holes should be processed. Because the plane has a flat contour and a large area, the plane is processed first, and then the plane is used to locate the hole, which can not only ensure the hole has a stable and reliable positioning reference, but also ensure the position accuracy of the hole and the plane.
The general principle of processing and cutting process arrangements for non-standard parts is that the preliminary work must prepare for the follow-up work, lay a good foundation, and provide quality services.