Research On Assembly Sequence Planning And Cable Laying Method Of Electromechanical Products For Virtual Assembly

With the continuous development of technology,the design of electromechanical products is more complicated and fine,and the use of flexible components such as cables are increasing.The quality of cable installation affects the reliability of products seriously.In addition,the flexible cable is easily deformed during the assembly process,which complicates the assembly sequence planning of the rigid-flex hybrid electromechanical products.However,product assembly is the key to affecting production efficiency and product quality.Thus,improving product design and assembly quality has become a key focus of manufacturing development.The research deals with the problems existing in cable laying in electromechanical products and the lack of research on flexible cable participation in assembly sequence planning methods,discusses the cable path planning and laying method of electromechanical products in virtual environment and the assembly sequence evaluation and planning method of rigid-flexible hybrid products.A cable routing method based on improved A* algorithm is proposed.Based on the preprocessing of wiring space,the A* algorithm is improved from four aspects: valuation function,stiffness factor,additional factor and position factor.An improved diagnostic method for interference between cables is proposed.The results of twodimensional path simulation and three-dimensional virtual routing show that the improved A* algorithm can obtain the optimal path that satisfies the condition.Based on the catenary theory,the simulation modeling method of cable under uniform gravitation is studied,and the influencing factors and relationship of the clamp position setting are analyzed.The cable flexible modeling results in the virtual environment show that the clamp catenary theory can simulate the actual state of the cable under uniform gravity,which can provide guidance for cable routing in engineering practice.Based on the flexible characteristics of the cable and the characteristics in the actual assembly,the evaluation index of the flexible cable in the product assembly sequence planning is determined.The deficiencies of AHP in the process of determining the weight of assembly evaluation index are analyzed.The weight of the evaluation index of assembly sequence of rigid-flexible hybrid products is solved by ANP,and the corresponding comprehensive evaluation function of product assembly sequence is obtained.Based on this,a method of assembly sequence programming based on improved genetic algorithm is proposed.The genetic algorithm is improved from coding,population initialization and genetic operation.Based on the simplified cabinet model,the improved genetic algorithm is used to solve the optimal assembly sequence.The solution results verify the effectiveness of the algorithm and provide reference for the assembly process planning of the actual cabinet products.