Application of Welding Robot in Welding processing

【Summary Description】 Welding robots are mostly positioning arm robots, with two types of teaching and intelligent. Teaching robot: through teaching, memory welding trajectory and welding parameters, in strict accordance with the teaching program to complete the product welding. With only one teaching, the robot can accurately reproduce each step of the teaching. This type of welding robot is widely used and suitable for mass production. For fixed stations on the assembly line. Its function is mainly to teach and reproduce, and its adaptability to environmental changes is poor. It is useless for small batch production of large structural parts on the construction site. Intelligent robot: It can automatically determine the starting point, spatial trajectory and related parameters of the weld according to simple control instructions, and can automatically track the weld trajectory according to the actual situation, adjust the welding torch posture, adjust the welding parameters, and control the welding quality. This is the most advanced welding robot, it has the characteristics of dexterity, light, easy to move and so on. Can adapt to different structures, different positions of the welding task. At present, there are few practical applications and it is still in the research and development stage. In welding robots, spot welding robots account for 50%-60%, which consists of three parts: robot body, spot welding system and control system. The degree of freedom of the robot body is 1~5, and the control system is divided into body control and welding part control. Welding system mainly includes: welding controller, welding tongs and water, electricity and other auxiliary components (underwater welding). 2 computer software applications. The application of computer software system in the field of welding mainly has the following aspects:. 1. Computer simulation technology includes simulation of welding thermal process, welding metallurgical process, welding stress and deformation. Welding is a complex process involving disciplines such as arc physics, heat transfer, metallurgy and mechanics. By simulating the various processes of welding by computer, the computer system can determine the best design scheme, process method and welding parameters for welding various structures and materials. Traditionally, the welding process is always determined through a series of tests or based on experience to obtain a reliable and economical welding structure. Computer simulation only needs a small number of verification tests to prove the applicability of numerical methods in dealing with a certain problem, and a large number of screening work can be done by the computer, which saves a lot of test work, thus greatly saving manpower, material resources and time, which is of great significance in the welding of new engineering structures and new materials. The level of computer simulation technology also determines the scope of automated welding. In addition, computer simulation is widely used to analyze the strength and performance of welded structures and joints. 2. Using database technology and expert system, the welding process design and process parameter selection, welding defect diagnosis, welding cost budget, real-time monitoring, welding CAD, welder assessment and so on are studied. Database technology has penetrated into all aspects of the welding field, from raw materials, welding tests, welding processes to welding production. Typical database systems include welding procedure qualification, welding procedure planning, welder file management, Welding materials, material composition and performance, weldability, welding CCT chart management and welding standards consulting systems. These database systems provide favorable conditions for the management of various data and information in the welding field. Welding expert system mainly focuses on process formulation, defect prediction and diagnosis, computer-aided design and so on. In the existing welding expert system, process selection and process formulation are the most important application fields, and the real-time control of welding process is an important development direction. Computer-aided quality control (CAQ) is used for data analysis of products and real-time monitoring of welding quality. In addition, computer-aided design/manufacturing (CAD/CAM) is increasingly used in Welding processing, mainly for CNC cutting, welding structure design and welding robots.

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