Research And Application On The Workshop Manufacturing Execution System For Cellular Manufacturing

Increasingly fierce market competition and production requirements with many product kinds, small batches and rapid delivery of goods have brought great pressure to manufacturing enterprises. Enterprises are beginning to seek advanced production mode to enhance self competitive power. As an advanced production and organization mode, cellular manufacturing technology is gradually accepted by more and more manufacturing enterprises. Manufacturing execution system is an information system connecting upper production planning and lower industrial control, which can effectively improve manufacturing process management, reduce production cost and increase production efficiency. So MES also catches more and more manufacturing enterprises'attention. At present a lot of research work about generic technology of manufacturing execution system has been carrying out at home and abroad. However, there nearly still have no researches on MES under cellular manufacturing environment. This paper will mainly study the MES architecture under cellular manufacturing environment and the manufacturing cells optimal reconfiguration problem.This paper firstly introduces the characteristic, resource organizing mode, production planning and control mode of workshop manufacturing system, and then analyzes the production management activities of workshop manufacturing system under cellular manufacturing environment in detail. On the basis of our project group's early research, a workshop manufacturing execution system structure model for cellular manufacturing is put forward. Then the function structure of MES is established and the main business process is analyzed.Manufacturing cells are the basic unit of production organization in cellular manufacturing system. And manufacturing cells reconfiguration is one of the problems that should be solved first to carry out cellular manufacturing mode. Paper designs a calculation method for parts process similarity based on the analysis of parts process similarity at first. Then a heuristic part grouping method based on fuzzy clustering analysis is proposed. And a mathematical programming model for equipment optimal group is set up aimed to minimize the total cost of parts processing on the equipment. On the basis of these steps, a two-stage manufacturing cell optimal reconfiguration method is formed, which is verified by a concrete example.The research results mentioned above has been adopted into workshop manufacturing execution system developed by our project teem and obtained good application effects.