Design And Development Of Flexible Welding Fixture Based On Multiple Location Requirements And Typical Working Conditions

With the rapid development of domestic automobile industry,people have higher and higher requirements for comfort,appearance perception and safety factor of automobile.The renewal speed of new automobile products has been accelerated,and higher requirements have been put forward for domestic automobile manufacturing industry.Single vehicle production line can not meet the needs of rapid iteration of automobile.Multi-vehicle flexible production line is an important development direction in the future.The biggest difficulty in multi-vehicle mixed production line is that the positioning datum of each vehicle is not uniform.Therefore,it is urgent to realize the flexible design and development of fixture positioning unit in body welding line.This paper will introduce the design and development of multi-vehicle flexible fixture.The following are the main work and research contents of this paper.Firstly,this paper studies and summarizes the structural characteristics of automobile body parts,combines with manufacturing characteristics,and based on this,analyses the design requirements of welding fixture in the process of welding parts assembly.According to the modern automobile fixture desi gn theory,the suitable locating and clamping mechanisms are fully studied and compared to guide the follow-up development.Secondly,in view of the white body is composed of more than 400 stamping sheet,there are many different kinds of parts and different styles,these parts on about 100 sets of welding fixture assembly welding and become white body,the body assembly and welding fixture is the important carrier,and influencing factors of more important role,the development difficulty is great.Creative different features is proposed based on parts,this paper combined the different demand of fixture in order to satisfy the demands of spare parts localization and flexible production of flexible welding jig design and development theory,by demonstrating the top-cover of flexible fixture of successful cases.Again,car development is moving in "high quality,short cycle,low cost" the trend of development,customer demand models as soon as possible,model development costs are lower,is the development direction of automobile body manufacturing technology to optimize the design of the plant,process technology,realize the resource saving,efficiency,clamp the future trend of the development of car body is simple,lightweight,miniaturization,intensiv e,flexibility,low cost,reconfigurable and modular.Based on lateral confining fixture development as an example,this paper studies the low cost of flexible design method,has the vital significance.In this paper,according to the development trend of welding fixture technology at home and abroad,the design theory of flexible welding fixture is studied.Based on the technical characteristics of parts,positioning requirements and operating conditions,the design optimization method of flexible welding fixture for automobile body is summarized and refined.This paper systematically introduces the composition,structure and design method of welding fixture,expounds the scheme of flexible welding fixture,and emphatically introduces the design and developm ent method of flexible welding fixture based on examples.Through the development and practical application of flexible side fixture,the development cost is significantly reduced,and better economic and social benefits are achieved.