Performance And Simulation Of Serial Production Line Considering Man-machine Ratio

Based on the research background of serial production line,this paper analyzes and studies its production line performance from the whole to the part and then to the whole mode.Considering the effect of serial production line performance under different manmachine ratios,its main research idea extends from a single classical production line performance study to a comprehensive performance analysis of production lines in many aspects,and considers the performance study of serial production lines under different conditions.Firstly,the performance factors of the serial production system are analyzed independently from four aspects: the utilization rate of workers in the production line,the reliability of the machine,the performance of the buffer zone and the scalability of the production line.In view of the above aspects,this paper further analyzes the performance influencing factors in actual production and operation,and studies the parameter setting and application mode of the man-machine ratio mode,machine failure and repair time distribution mode,buffer capacity setting,workstation combination mode and other factors in the unbalanced serial production system.An Em-plant simulation model is established based on a simple serial production line with 12 pieces of equipment.By setting the relevant conditions and parameters of the model,a serial production line model including fixed man-machine ratio,machine failure and repair time and buffer zone design is established.The effectiveness of the established simulation model is determined according to the throughput rate,personnel utilization rate,operation process and sensitivity analysis of the model operation.Secondly,for the serial production system including fixed number of machines,production cycle and total downtime of machines,orthogonal experiments are applied to analyze and study the performance of its production line.Taking the throughput of the production line as the performance index,four experimental factors are set,namely,man-machine ratio,distribution mode of machine failure and repair time,combination mode of workstations and buffer capacity,etc.,which are respectively designed by orthogonal experiments at three levels.The Em-plant simulation software is applied to simulate the above-mentioned groups of experiments and output throughput indexes of different level combinations in the experiments.After the statistics of different groups of experimental results,the statistical data are analyzed by the methods of range analysis and variance analysis,so as to obtain the degree of influence of various factors on the performance of the unbalanced serial production line and the best production line performance indexes under which combinations can be achieved.Finally,based on the 56 D cast iron wheel support serial production line of a company,this paper analyzes the production line performance,simulates the current production line with Em-plant software and analyzes the production line performance.According to the analysis results of experimental design,the relevant factors of 56 D cast iron wheel support production line are improved,and the performance indexes of the production line before and after the improvement are compared and analyzed.The results show that the throughput of the production line has been greatly improved after the improvement.The rationality and effectiveness of this research method are verified by case application,which provides an effective reference for the design and process improvement of the same type of serial production line.