The robot control system is the brain of the robot and is the main factor determining the function and performance of the robot. The main task of industrial robot control technology is to control the movement position, posture, trajectory, operation sequence and action time of industrial robot in the workspace. It has simple programming, software menu operation, friendly human-computer interaction interface, online operation prompt and Easy to use and other features. At present, the application engineering of robots is developed from a single robot workstation to a robot production line. The networking technology of the robot controller makes it easier to monitor, diagnose and manage the robot production line. Robot welding has been widely used in the automotive industry, such as automotive chassis, seat frame, guide rails, muffler and torque converter. Toyota uses spot welding as a standard to equip all spot welding robots in Japan and overseas. This technique can improve the quality of welding, and even try to replace some arc welding operations with it, and at the same time, the movement time in a short distance is greatly shortened. The company introduced a low-profile spot welding robot that is used to weld lower parts of the car body. This short spot welding robot can also be assembled with higher robots to work together on the upper part of the body, thus shortening the length of the entire welding line. The chassis parts of the rear axle, sub-frame, rocker arm, suspension, shock absorber, etc. are mostly force-safe parts based on Metal-Inert Gas Welding (MIG). The main components are stamped and welded. The average thickness of the plate is 1.5~4mm. The welding is mainly in the form of lap joints and angle joints. The welding quality requirements are quite high, and the quality of the steel directly affects the safety performance of the car. After the application of the robot welding, the appearance and internal quality of the welded parts are greatly improved, the quality stability is ensured, the labor intensity is reduced, and the working environment is improved. The key to laser welding equipment is high-power lasers. There are two main types, one is solid-state laser, also known as Nd:YAG laser. The Nd:YAG laser has a wavelength of 1.06mm. The main advantage is that the generated beam can be transmitted through the optical fiber, so that a complicated beam delivery system can be omitted, which is suitable for flexible manufacturing systems or remote processing, and is usually used for workpieces with high welding precision requirements. The automotive industry commonly uses Nd:YAG lasers with an output power of 3 to 4 kW. The other type is a gas laser, also known as a CO2 laser, which uses a molecular gas as a working medium to produce an infrared laser with an average of 10.6 mm. It can work continuously and output high power. The standard laser power is between 2 and 5 kW. Laser technology in the automotive industry is mainly used for body welding, welding and parts welding. Germany's Rofin-Sina and Trumpf mainly produce CO2 lasers, HAAS mainly produces solid (Nd:YAG) lasers, and IPG produces new fiber lasers, and Laserline produces semiconductor lasers to form competing and complementary lasers. Technology development and production chain. Volkswagen, BMW, Mercedes-Benz and Meyer shipyards are German demonstration companies applying laser welding technology. Volkswagen in Germany has introduced laser welding technology into China and applied it to the mass production lines of Shanghai Volkswagen and FAW-Volkswagen's cars, which has promoted the application of laser welding technology in China. The use of diode-excited solid-state lasers with output powers greater than 4 kW is decisive for the welding of aluminum alloys. The beam quality of these systems is particularly good and can be instantaneously injected into a fiber with a diameter of 0.4 mm. The focusing power of the laser beam is greatly dependent on the cross-sectional area of ​​the fiber. This shows that the potential of this new generation of solid-state lasers is that the "dot" has a smaller diameter and higher power density, enabling people to perform welding in a continuous wave mode. For example, it is used to study various connections for small samples and small parts, such as butt joints, T-weld joints and lap joints. The material of the parts is AlMgSi0.7 (thickness: 3mm) and AlMg3 (thickness: 1.6mm) aluminum alloy. . High-quality weld bead shapes are only possible in a purely continuous wave state. When welding aluminum with a kilowatt-scale diode-excited Nd:YAG laser, high reliability is achieved over a wide range of parameters. The dome Optical Lens is a hemisphere. 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