Research On Production Control Optimization Scheme For Flexible Manufacturing Of Shipyard’s Pipe Workshop

Thousands of pipes are required during the ship construction process,the materials or shapes of these pipes are different,and the process requirements are also different.Therefore,the planning and allocation of production resources in the pipe workshop have great flexibility,and it is difficult to carry out unified mass production.The processing of ship pipes is actually a flexible manufacturing process.The core connotation of flexible manufacturing is the efficient allocation of flexible production resources to maximize the utilization rate of productivity,thereby avoiding unnecessary waste in all aspects of the production process.This requires effective and reasonable arrangements for the processing of pipes in multiple processes and the coordinated operation of all aspects of workshop production.Generally speaking,scheduling are the most important means for optimizing the allocation of flexible production resources;production control systems are production management methods that control the production cycle and ensure the smooth operation of flexible manufacturing processes.This article combines the characteristics of flexible manufacturing in the shipyard’s pipe workshop,considering the optimization of the shipyard’s pipe hybrid flow shop scheduling system and production control system,to build an integrated production control optimization plan to achieve the optimal allocation of production resources and effective operation of the production process.The main content of the paper is:(1)The theoretical significance and research methods of the workshop scheduling problem and the production control system under the flexible production environment of the shipyard’s pipe workshop are analyzed.From the perspective of the practical application of the shipyard’s pipe workshop,the current situation of the scheduling system and the production control system was explored.And on this basis,it is proposed to adopt an integrated production control optimization plan to coordinate each production link of the shipyard’s pipe workshop to optimize the allocation of production resources and optimize the production process to achieve the optimization of each production performance index;(2)A Memetic algorithm is designed to optimize the scheduling of pipes in response to the scheduling requirements of minimizing the maximum completion time of the pipes and the minimum total flow time of the pipes in the shipyard’s pipe hybrid flow shop.The practical significance of minimizing the total flow time of pipes to speed up the sorting and pressure testing of completed pipe fittings is analyzed.And effectiveness of the algorithm is verified by using C ++ language programming to carry out simulation tests on examples of different scales;(3)The actual needs of the pipe workshop scheduling process are analyzed.According to the characteristics of the flexible manufacturing of the pipe workshop,a system that can meet the static scheduling and dynamic scheduling needs of pipr processing is built and developed around the four aspects of system demand analysis,system overall architecture,functional module design and database structure design.The typical problems such as the lack of pertinence,single function and weak operability of the previous pipe workshop scheduling system are improved;(4)The advantages and disadvantages of the CONWIP control system are analyzed.Based on shipyard pipe hybrid flow shop as example,the CONWIP control system is improved,and the effectiveness of the new control system in reducing the average production cycle of the product,increasing the output rate of the product,and maintaining the load balance of each station is verified by combining DOE theory with simulation software.