Apparel Production Technology Computer-aided Scheduling And Planning (capp) System Development And Research

By investigating and analyzing the sewing assembly line of actual apparel factory, and with the theoretic knowledge of process design, this thesis put forward a basic idea of Computer Aided Processing Plan (CAPP) system on garment production.First the thesis introduced the development processes of garment industry and its production property, pointed out the necessity to use computer to design and manufacture in garment manufacturing. Then based on explaining the method and characteristic of process planning in garment production, simply introduced the garment CAPP system, and indicated the reasons why to study CAPP in garment industry. The thesis also analyzed its development situation, problems and courses at the present time.The key part of this thesis is by studying the main aspects of process planning and with the practical production in enterprise, developed one CAPP system, which stressed on processing balance in assembly line. According to the technical course, the system is divided into six function models: information input; product describing; process building; process edit; print and output; maintenance. Namely according to the production process in garment enterprise describes its outer style and inner structure of each fashion. By selecting the style and structure of each part, the system can get the code. Then by searching the process knowledge library, it extracts the corresponding process information and generates Flow Diagram, Process Specification and Process Operation to direct the production. The design of code and the structure of knowledge library is the key technology. The code system in this paper includes: the main code-group code, the assistant code-types code and optimize code, which can describe the process of any garment product clearly and it is the only one. The design of knowledge library also makes good use of the system's resource and easy to maintain. This system has built up the knowledge library of men's suit and shirt, blouse.This paper also preliminarily studied the technical problem, which is key and difficult for the CAPP - the merging rules and balancing arithmetic of working procedure. By summing up the merging rules and with the production characteristic of garment assembly line, adopted one optimize - linear programming method, which has been applied widely at present. Turning the balancing matter to the linear programming matter, the system uses some basic information such as the order size and the deadline to generate its target programming and the rules and probability of merging are its restriction. The rules and the balancing arithmetic are the basis and indicate of the using grade for CAPP system, this system solved the problem preferably.The system can search, modify the existed files and buildup the new files. Its process files also can be printed and outputted according to certain form.In a word, the design of the whole system fundamentally meets the current production requirements of the garment enterprises. It has a certain utility and contributes positively to the development of garment CIMS.