Design Of Robot-fixture Matched For Passenger Car Side Welding Based On Virtual Assembly Technology

Passenger car left(right)side of the white body is one of the six major assembly in the important assembly.Passenger car side of the manufacturing,the use of traditional welding method,the high cost of manpower has been difficult to bear;the use of manual welding is difficult to achieve welding accuracy and welding speed is slower;welding generated by the spark and smoke will be on the body cause some damages.On the other hand,the shortest delivery time,the best product quality,the lowest product prices and the best service has become the vehicle factory for white body manufacturing supporting parts of the basic requirements of enterprises.For the time,quality,cost,service and environment,and several other aspects at the same time to meet the market and social needs,so as to obtain the greatest economic and social benefits,as supporting parts enterprises,research and development of passenger car side of the module intelligent welding production line Is an inevitable choice.And the current use of welding robots and welding wire seamlessly connected to the core technology for the vehicle factory to provide white body supporting the auto parts business is very few.Intelligent welding production line needs to involve computer technology,automation control and robot application,through the hardware and software system integration,and the robot transmission layout work island,complete welding and other processes.Automotive side of the intelligent welding production line,to improve the working conditions of workers,improve labor productivity,and constantly promote enterprise innovation to maximize the benefits of enterprises.In the process of machining,such as welding,inspection and assembly process,in order to ensure the processing quality and production efficiency,the vehicle side of the tooling for the non-standard equipment,in order to ensure accurate positioning of the work piece,high quality welding needs specialized design.Main research contents:1)Car side of the car body is an important component,a direct impact on the car appearance.Side of the welding quality directly affect the body and even vehicle quality.As the body stamping parts are relatively large and easy to change,while requiring high precision welding fixture clamping positioning elements.Car body design,the need for sheet metal positioning holes,leakage holes and other precise settings,so as to ensure accurate positioning of the work piece in the clamping.2)the development of welding fixture and its key,through the full analysis of the welding parts,designed a reasonable support plate,clamping mechanism,power components,positioning components.Welding process,the need for high-precision spot welding robot,according to the robot path planning can be accurate welding of the solder joints.3)spot welding robot for the six-degree-of-freedom robot,through the robot structure design to obtain digital model.Which the selection of welding torch,according to the automotive sheet metal parts,the servo welding torch digital model of the establishment.4)The digital model of the automobile side,the welding fixture,the welding robot and the welding robot is integrated in the virtual assembly system.Based on the 3Dquest software,after the movable fixture is adjusted,the side seal is fixed on the welding fixture,According to the actual operation of the welding robot and the welding robot operation arm,the dynamic position of the hand and the arm is defined.Through the virtual welding scene,the exact match between the arm and the fixed side and its welding fixture is obtained,and the welding fixture and welding Precise technology prototype developed by manipulator.