The Key Technology Research Of The Door Welding Line Design Analysis And Industrial Robot Simulation

Body in white(BIW) is one of the automotive’s assemblies, its manufacturing qualitydirectly affects the safety performance and market competitiveness of the car. BIW’smanufacturing course mainly includes four processes,including stamping,welding, painting,assembly. Each process is closely linked with the body’s performance.The work of bodywelding line is to complete car parts welding task.The line contains various kinds ofequipment and covers large-scale, its beat is very high.As a modern industrial product, theautomobile’s model upgrades faster and faster, BIW’s structure varies more and more.Howto design a reliable and flexible welding line efficiently,has become a problem ofautomotive manufacturing industry to be solved nowadays.Based on the above background, the paper makes a research about the door weldingline of car A.Many technical difficulties will be discussed,such as,project planning,processanalysis,equipment design,mechanical analysis,robot trajectory planning, virtual simulationand so on.Firstly,according to the vehicle factory’s production plant,the production process andplan has been designed.On the basis of the analysis of the door’s structure,the productprocesses and station structures,line beat, layout are initially identified.Then,based on theabove analysis,the welding equipments in the automatic station and manual station havebeen designed,including three-dimensional models and two-dimensional drawings.Take aindustrial robot’s handling gripper as an example,this paper analyzes its finite elementstatic model.Finally, give a research about the industrial robot which is regarded as the keyequipment in the welding line.The mathematical model is builded according to the robot’s kinematics knowledge.The research is mainly focused on the robot’s trajectory planningprinciples,verifying the correctness of the algorithm by using the cubic polynomialinterpolation and the mathematical simulation software.The automatic station’s virtualsimulation model is founded by using the emerging digital factory technology,as to validatethe final fixture’s structure and the viability of the project plan.Make off-line programs forthe industrial robots,then try to eliminate the error between the simulation model and sitemodel by site checking and debugging,this technology can greatly improve the designefficiency of the welding lines.In this thesis,the general theory and procedures,methods of body welding line designare described in detail,reveals the trajectory planning principle of industrial robot.Theresearch can provide guidance for the body welding line design and manufacturing.