A Research To Improve Car Welding Workshop Scheduling Based On Production Balancing

the main purpose of production planning is the maximal application of resource, in order to increase the output and improve the production efficiency of whole system , make the commitments of order due-date achieved as scheduled. production planning plays an important role for the success of enterprise operations.The enterprise production scheduling is the specific action plan with guiding enterprise ' s daily production activities.Therefore, the good shop production scheduling can assure the health operation of the whole enterprises,because it can adequately and reasonably utilize all of the enterprise's production resources include the personnel, material, equipments and so on, in order to make sure the output of the enterprise satisfy requirements for the client the most limitly and decreased all waste and manufacturing cost, inventory costs.The product planning is the core,and the most difficult management tache for the automotive manufacturing corporation. Welding shop is a subsystem in automotive manufacturing system.Its production plan deriving from the main workshop's production plan , displays production tasks of specific model of car and production sequence. When establishing production plan ,it make the business accounting of capacity balance commonly on the whole,but it's not the balance for every tache. It need carry on a detailed accounting of the balance, according to a shorter period of time (such as mid-week)and the smaller the capacity ,to achieve the goal of balanced production. Therefore, This article analyses production layout, process flow and production characteristics for welding shop of FAW Car Co., Ltd.And it calculates production capacity of the key production lines and the entire production workshop, improve and make the medium and short-term production planning and production scheduling program pipeline, to meet specific requirementsIn actual production,the parts has multiple processing lines. A process that could be completed by a multiple of optional equipment ,is completed by one of them. In the production tasks, to balance the load of processing equipment, enable them to complete production tasks in the same time as possible, all of them are important tasks. If the equipment workload is imbalance and equipment is used irrationality ,it will increase the waiting period for parts, impact the processing time of a number of components, and affect production efficiency and parts delivery. Therefore,after analysising the key elements of welding workshop—process flow, productive capacity and so on , based on the balance of production ideas, according to the welding workshop production, apply the theory which is related to the production management knowledge to analyse the relation of productive capacity and the load of production task ,establish mathematical model of Integer Linear Programming (ILP), to achieve proportion reasonably the load of production line and a load balance of production line; then propose a program to improve personnel arrangement to meet production needs and achieve the goal of balanced production.The management of a mixed pipeline is not equival to thousands single-line's . Only considering the mixed balanced production pipeline will not solve the problem of mixed flow production system of production organization.It must consider production scheduling problem. On the premise of The Production equalization,make the production lines work in the best allocation of production task,meanwhile, meet the technical requirements of the assembly shop and painting workshop, arrangements for the welding shop scheduling is an important element of production plan for Welding Workshop, which use two methods of positive sequence and backward sequence to make restructuring and optimization for welding workshop production plans. Comparing the advantages and disadvantages of different methods, this article has made the sequencing methods applied in practical production and gained a practical effect.