4.2.2 BOM in CAPP
After the product has been designed by the design department, part of the electronic data is transferred to the process department to develop a process route (CAPP), which becomes a document explaining the process of component processing or assembly. It is not a technical document, but a planning document or a guidance production document. CAPP generally consists of process card, processing process card, forging heat treatment card, test card, tooling material working hours and other summary information; in a processing process card by the process (processing steps), working hours quota (occupying the load time of the work center ), processing equipment, testing equipment, processing tools, fixtures, materials and other components.
In the preparation of the process plan, in addition to each nuance of the design, it also involves the main work center materials, material materials, processing fixture materials, tooling materials and auxiliary materials in the BOM. Maintaining the accuracy of these static data is a prerequisite for ensuring that production is on schedule. Equipment maintenance, spare parts management, maintenance records, material procurement and inventory changes, processing fixtures, tooling equipment, accessories, etc. in the main work center must be reflected in the process planning in real time.
In the process planning process, you should be able to browse the BOM information at any time (object-oriented), input the BOM information, alarm BOM information (the process compiler finds the error alarm), reflect the updated BOM information in real time, and so on.
In the absence of computer system support, the process compiler must put forward high requirements: not only need to know the current status of the part processing process and processing equipment, but also know the technical parameters, inventory, processing fixtures, tooling equipment, etc. Happening. In general, it takes 20 years for a company to train a similar person.
Now, with the support of the computer system, the technician can easily query the typical process database designed according to the BOM structure, obtain the design information, query the technical parameters of the machine tool, etc. It can also easily compile the CAPP to ensure the integrity of the process documentation. , consistency, correctness and implementation feasibility. The data generated by the process department (CAPP) is processed by PDM and transmitted to the ERP system.
