| China’s automobile product processing industry has become a modern key industry and a typical representative with highly intensive technology,capital and talent,high globalization and strong market competitiveness.Although the automobile manufacturing industry is still located in the downstream of the whole production line and product chain for a long time,it has become the main carrier of the real economy to obtain the development of liquidity.Among them,the assembly technology of the vehicle workshop is the last technology required for the production of the vehicle,and it occupies an extremely important position in the production of the vehicle.Products in the automobile manufacturing industry involve at least hundreds of parts,in which the entire assembly process needs to cooperate with each other and complex.Therefore,when multiple models of vehicles are produced in col-linear production,the attributes of the products to be produced will change within a certain range according to customer needs.As customer demand becomes more demanding,products and services may be produced that exceed even the designed capacity of the assembly line used.Therefore,when launching new products,the assembly line should have a dynamic adjustment ability,which can quickly and flexibly adjust the production process and technology.In this paper,the grasping structure in the welding production line is studied,and the grasping structure in the assembly line is modified and designed flexibly,so as to meet the development and production of new technology products with less capital and economic investment and higher flexibility level of the assembly line.Aiming at the present problems,this paper designs three kinds of flexible grips for the side of car body in white.The specific work is as follows:First of all,the composition of car body in white was deeply analyzed,and the structure and technological process of the front beam,back beam and side girth of car body in white roof were analyzed emphatically.Combined with the working principle of flexible gripper,the grasping position of the gripper was determined.Secondly,according to the design requirements of the grasping position and gripper,the structure design and modeling of the front beam of the car body in white roof,the rear beam of the roof and the flexible grippers of the side wall are carried out based on the CATIA three-dimensional modeling software.Analyze the existing structural model in the Hypermesh structural work management platform to establish a structural finite element analysis model,and make full use of the Optistruct module in the Hypermesh-based work platform to perform static simulation analysis on the finite element model,and obtain the finite element of the flexible gripper structure Meta-analyze stress diagrams and displacement diagrams to analyze whether they meet the requirements of engineering applications.The static finite element analysis is carried out on the front cross beam and the rear cross beam of the car body in white to verify whether it is within the safety modulus in the grab mode.Verify that the designed mechanism meets the design requirements.Finally,the kinematics analysis of the flexible gripper around the side of the car body in white was carried out to verify that the flexible gripper around the side could complete the grasping,carrying and other functions during the movement process.Design of car white body roof beam before and after the roof beam and side is surrounded with flexible grasp not only effectively solved the car welding production line in many models of car white body roof beam before and after the roof beam and side fetching,lifting,handling requirements,at the same time to improve equipment utilization,and reduce the production cost,and provides reference for the research of other flexible grabs. |
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