Research On Optimization And Scheduling Of Welding Mixed Flow Production Line Based On Plant Simulation A Company

In the production and manufacturing process of automobile manufacturing industry,there is no basis for the layout of welding workshop facilities and no effective means for in-depth study on the level of failure rate control,the best production scheduling plan and other issues.These problems may lead to high inventory of products in process,late delivery,unreasonable production plan and mismatch between supply and demand,low utilization rate of workers’ load and equipment,which has profound practical significance for the optimization and scheduling of production line in automobile welding workshop.Firstly,this paper analyzes the current situation of a company’s welding mixed flow production line.From the perspective of production and operation data,it reflects a company’s determination to optimize the transformation and leads to the goal of this paper.This paper briefly introduces the production situation of the welding workshop,including the function and structure of BIW,the production process,the characteristics of materials and transportation,etc.on this basis,it summarizes the production characteristics of the welding workshop,and makes a detailed analysis and introduction of the production line to be studied.Then the part of the study is modeled and analyzed.Based on the comparison of several simulation modeling software,plant simulation is selected as a tool for subsequent research and modeling.According to the usual modeling steps,the feasibility evaluation is carried out before modeling,the simulation task and framework scope are determined,and some constraints and simplification conditions of the model are set.The collected data should be processed reasonably and modeled one by one according to the actual production situation to ensure that the operation logic and operation state of the model are consistent with the production and verify the reliability of the model.Then the optimization of the production line is studied.Using the experimental tool object in the model,the model is modified appropriately,and the equipment failure rate and buffer setting of each sub assembly line are studied separately.For the assembly line without buffer between lines,the key to improve production capacity is to reduce the failure rate of the station with longer processing time in the assembly line.The buffer zone in the line is mainly set in front of the station which has a great effect on the production capacity,and the better buffer zone setting scheme is determined through continuous test.Finally,the production scheduling scheme of welding workshop in company a under the condition of mixed production of four models is studied.Using the genetic algorithm tool,according to the actual production situation in the workshop and the application characteristics of genetic algorithm,the model and tool are modified and some parameters are reset to determine the individual evaluation scheme,initial population,cross mutation probability,etc.On this basis,a better scheme to meet the requirements is obtained.The output of the target vehicle type and JPH value of the workshop are increased by 22.36% and 3.7% respectively year on year.And in the model,observe the operation of buffer between lines,judge that the setting of buffer between lines is basically reasonable.