(1) When analyzing the part drawing and product assembly drawing design process specification, the part drawing and the assembly drawing of the part or assembly where the part is located should be analyzed first to understand the position and function of the part in the part or assembly and the part or assembly. The technical requirements for this part are analyzed, and its main technical keys and corresponding technological measures should be analyzed.
(2) Process review of part drawings and assembly drawings. Check whether the views, dimensional tolerances and technical requirements on the drawings are correct, unified and complete, and evaluate the structural manufacturability of the part design. , and discuss the drawing revision plan with the relevant designers, and report it to the supervisor for approval.
(3) The production type of parts is determined by the annual production program of the product and the research on the characteristics of the product itself.
(4) Determine the blank to improve the quality of blank manufacturing, which can reduce the amount of machining labor and reduce the machining cost, but at the same time may increase the manufacturing cost of the blank. The blank manufacturing method must be determined according to the production type of parts and the production conditions of blank manufacturing. It should be pointed out that the material utilization rate of my country's machinery manufacturing plants is low. Whenever possible, the use of advanced blank manufacturing methods such as precision casting, precision forging, cold rolling, cold extrusion, and powder metallurgy should be promoted. The material utilization factor is an important parameter to measure whether the design of the process specification is reasonable.
(5) The main contents of formulating the process route include: selecting the positioning datum, determining the processing method of each machined surface, dividing the processing stage, determining the degree of process concentration and dispersion, and determining the process sequence, etc. When drawing up the process route, several possible processing plans must be proposed at the same time, and then through technical and economic comparative analysis, the most reasonable process plan is finally determined.
(6) Determine the machine tool equipment and process equipment (including tools, fixtures, measuring tools, auxiliary tools, etc.) used in each process, and propose a design task book for special process equipment that needs to be modified or redesigned.
(7) Determine the machining allowance of each process, and calculate the process size and tolerance.
(8) Determine the technical requirements and inspection methods of each process.
(9) Determine the cutting amount and working hour quota for each process.
(10) Prepare process documents.