Research And Development Of Process Planning And Production Scheduling System Navigated By Equipment Capability

Process planning and production scheduling are two import links of production. It has the important theoretical and practical significance for integration between the twos, which can improve the feasibility of process planning, raise process planning and scheduling optimization, improve equipment utilization, reduce the cost of production, and increase their market competitiveness. Therefore, this paper has developed an independent copyright, universal, intelligent, opened, graphic-driven process planning and production scheduling integrated software system with shared information.This paper analyses the system functional requirements and sets up manufacturing resource model and file storage structure which adapt to the needs of process planning and production scheduling. It adopts the design pattern to set up a unified structure of view and document, and to set up a unified command response mechanism on the integrated platform.This paper analyses the characteristics of how the process planning operation language is generated, and sets up the parametric model of the process planning operation language and develops relevant norms, and then establishes a reasoning model of the manufacturing resources capacity and the process planning operation Language. According to analyzing the DXF file format standards, it adopts object-oriented technology to resolve reading data and picking data. By using the mechanism of event and delegate, it resolves communication problems between the process planning system and DXF file processing system, further resolves how the process planning operation Language's parameters are replaced by real values.By studying the usual scheduling measures and dispatching principles, this paper proposes the minimum load scheduling algorithm based on critical ratio, and solves manufacturing resources load imbalance problem which exist on job-shop.The system, which adopts Visual Studio 2005 as developing tool and C# as programming language, realizes process planning and production scheduling system navigated by equipment capacity. The function and method of developing system is tested to be effective through examples.