Research On Balance Optimization Of Mixed-flow Production Line Of Y Company

With the "14th Five-Year Plan" and "Made in China 2025" proposed,the development scale of China’s manufacturing industry continues to expand,the quality of development is improving year by year,and the competitiveness of China’s manufacturing industry is constantly enhanced in the process of industrialization,which has become an indispensable part of the global supply chain.With the diversification and individuation of consumer demand,more and more enterprises begin to turn to the direction of product customization to meet the needs of customers.However,for a variety of products,different specifications and changing needs of the market,how to efficiently and stably produce products to meet all requirements of customers in a short time is the challenge that enterprises need to face.Mixed-flow production line has become an important tool to realize intelligent manufacturing,quickly respond to market changes and meet customers’ personalized needs.At present,the enterprise is committed to using the mixed flow production line to combine product customization and mass production,in order to produce a variety of different varieties of products in as short a time as possible,to meet the personalized needs of customers,and ensure the cost efficiency and quality stability.Y Company is the main chain enterprise in the VR/AR industry.In recent years,it has taken optical unit assembly as an important measure to enter the new market segment.In view of the characteristics of optical unit installation,which is of many varieties and less batch,it has set up an optical machine mixed-flow assembly line.Based on this,this paper takes the optical and mechanical mixed-flow production line of Y Company as the research object to study the balance of mixed-flow production line.Firstly,the concepts of mixed-flow production line and line balance are described,and the industrial engineering method and genetic algorithm used in this paper are introduced.Secondly,field investigation,operation measurement and line balance evaluation were carried out on the production process of the optical machine mixed flow production line of Y Company.The current situation of the optical machine mixed flow production line of Y Company was evaluated and analyzed by means of fishbone diagram,Pareto diagram,principle of 80/20,etc.,and the key factors affecting the balance of the mixed flow production line were dug out.Secondly,using the principle of motion economy,the principle of ECRS,the 5W1 H question method and the process analysis method,the key factors were analyzed,and the balance of the optical machine mixed flow production line was qualitatively optimized.Based on this,the production beat,load balancing coefficient and balance loss coefficient of the mixed-flow production line were set as targets,and the corresponding multi-objective line balance model was established.Targeted optimization and improvement of the genetic algorithm was carried out to improve the global optimization ability of the algorithm.Python software was used to solve the algorithm,and the balance of the optic-machine mixed-flow production line was further quantitatively optimized.You get the optimal result.The results show that the production beat of the hybrid line decreases from 824 s to 573 s,the load balancing coefficient of each workstation decreases from 179.7 to 44.2,the balance loss coefficient of the station decreases from 0.21 to 0.1,and the line balance increases from 79.4% to90.2%.Finally,the Flex Sim simulation method was used to build the simulation model of the light-machine mixed-flow production line,and the results before and after optimization were verified and evaluated.The simulation results showed that the utilization rate of the mixed-flow production line increased from 63.58% to 87.6%,an increase of about 24%,and the idle rate decreased from 35.27% to 11.06%.The feasibility and effectiveness of the optimization scheme proposed in this paper are verified.After the optimization of Y Company’s optical and mechanical mixed-flow production line,the line balance has been significantly improved,the work balance of all workstations has been improved,and the production efficiency has been improved to some degree,ensuring the timeliness of delivery and a substantial increase in output.In this paper,the research on the balance of the mixed flow production line of the optical machine provides a reference for other manufacturing enterprises to solve similar problems,and provides a certain direction for the research on the balance optimization of the mixed flow production line.