Operability Analysis And Evaluation Of Gear-box Auxiliary Line Assembly Task

The proposal of “made in China 2025” has made the competition of manufacturing industry more intense,and improving its competitiveness has become a key problem facing the whole manufacturing industry.All enterprises are looking for ways to improve themselves by finding their own problems and solve them.Although automation has become an inevitable trend in the era of high speed development of science and technology,for the assembly line of most engineering machinery enterprises,pure manual and semi manual operation still occupies the main position.For pure manual and semi manual assembly lines,how to find out the existing problems and improve their competitiveness is the challenge that all the engineering machinery enterprises need to face.In view of this situation,the research object of this paper,"assembly task maneuverability evaluation method",as a feasible method of analyzing assembly line,has important theoretical research and practical significance.To find the problems that exist on the assembly line,we must first determine what the problems of the assembly line will affect.The entities that are really affected by the assembly task are only the products and workers,so the quality of the products and the physical and mental health of the workers is the focus of this study.First of all,the whole assembly task completion process is divided into three stages: product design stage,task assignment stage and assembly operation stage.According to the factors that influence each stage,different quantitative analysis methods are selected for analysis,calculation and improvement.The product design stage is the birth stage of the product,and the product design stage also determines the degree of difficulty in the product assembly.The more complex the product design is,the more difficult the assembly is,the higher the worker's error rate,the product quality of the assembly line will decline.The complexity of product design is chosen as the operable index that affects the quality of the product at the stage of product design.The application of the expert evaluation system is combined with the expert scoring method and the analytic hierarchy process.The task allocation stage is the completion of the design and the quasi matching stage before the production.The size of the tasks assigned to each station affects the rate of operation error of the workers.If the amount of assignments is too large,it may lead to excessive information that the workers need to deal with so that the quality of the product will be reduced.The complexity of operation process is chosen as the operable index affecting the quality of products in the stage of assignment,and the generalized information entropy model is applied to calculate it.The assembly operation stage is the actual production stage.In the actual production process,the posture and movement of the workers in the assembly operation will produce the load for the workers.The overload of the assembly leads to the cumulative fatigue and even occupational disease of the workers,which damages the physical and mental health of the workers.CATIA ergonomics analysis module is selected for analysis and calculation.Through the influence of the three stages on the quality of product and the two aspects of the physical and mental health of the workers,the complete assembly task operability evaluation system is set up,and three kinds of analysis and calculation methods involved in this paper are used for reference and improved,and the analysis of the assembly auxiliary line of a gearbox factory is analyzed,and the improvement suggestions are provided,which proves that it is scientific and improved.It is of great significance to evaluate the operability of assembly lines.