Design And Analysis For Mechanical Arm Of Mobile Welding Equipment

Welding is one of the important manufacturing processes in machining. With the development of national economy, more and more welding robots are used in welding, since welding robots will improve the environment of workers and stabilize the quality of workpiece. Nowadays, welding robots are very popular in automotive, electronics industry and so on. However, the weld seam is usually as long as to tens of meters and the quality of the groove is always poor of the large structure parts, such as shipbuilding, construction machinery and machine tool, so industry robot is not available. In traditional, large robot welding stations are used to solve this problem, but the cost is very high and energy inefficient. Aiming to solve the problem mentioned above, this paper researched on mobile welding robot system. This study has great practical significance and will provide theoretical basis for research on mobile welding robot.This paper records an elaborate research on the mobile welding robot system. The main work includes four parts:Firstly, analyze the researching background of welding robot and mobile welding robot. The research content has been proposed according to the latest research of mobile welding robot.Secondly, three different kinds of mechanisms have been proposed according to the demand of welding process and the degree of the mechanism. Then the optimization design for the mobile welding mechanism has been done through the theoretical and simulated analysis of the three different kinds of welding robots mechanism respectively.Thirdly, the dimensions of links have been determined through dimensional synthesis which based on the analysis of process requirements and bionics principle. The engineering design has been completed by confirmed the driven style and driving mode of the mobile welding robot and the virtual assembly has been completed on the basis of three dimensional software.Finally, the rationality of the mobile welding robot has been verified through mechanism analysis based on finite element method. On the condition of the velocity is given, the dynamic analyses have been done which based on the virtual prototype technology. The force situation of very joints of the mobile welding robot could be observed.