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OFweek laser network: the Ministry of Finance website today announced the implementation of the 2014 tariff program. The program is clear, in 2014 will be the car production line laser welding robot to perform 5% of the provisional tariff rate of imported goods. The most favored nation rate for the class of goods is 8%, the general rate of 30%. Implementation of the program pointed out that the items referred to in laser welding robot is refers to in laser welding source of welding robot, composed of robot, control system, sensor, laser head and laser systems. Mainly used in automotive, electronics, metallurgy and other industries.
New direction of automobile manufacturing: robot laser welding
Welding is a necessary process method in modern mechanical manufacturing industry, which is widely used in automobile manufacturing. Along with the progress of science and technology, the welding problem of coating plate and light metal material is a new challenge to automobile welding. Robotics and automation of laser welding technology in automotive welding in the process of auto welding has changed the face of. With the rapid development of the automobile industry, laser welding technology has opened a new era of automobile welding.
1 Characteristics of laser welding technology
In the automobile manufacturing process, welding is an indispensable process in the automobile assembly line. Generally speaking, the main body welding resistance welding, seam welding, carbon dioxide welding etc.. In the part welding, the welding technology used in welding technology and flash butt welding, electron beam welding, electric welding, pulse welding, friction welding, etc.. In recent years, laser welding technology has been developed rapidly in the world.
Is different with the traditional welding process at present, laser welding can achieve the combination of molecules between two pieces of steel plate, popular is welded steel plate hardness is equivalent to a whole piece of steel, which will body strength increased by 30%, the body is combined with accuracy also greatly enhance. Of course, the actual use of laser welding is not only for this. Generally speaking, the vehicle on the road when the road from ground bumps into per minute on a thousand times the twisting motion of the test body, if body with precision, strength is not enough, light car endometriosis rings frequently, big noise, serious may cause installed on the vehicle parts such as gear box, the front and rear axle of the damage or body fracture.
Robot welding workstation
Robot welding workstation
The characteristics of laser welding is that the deformation of the workpiece is very small, and there is little connection between the gap and the depth / width ratio. Therefore, the welding quality is higher than the traditional welding method. However, how to guarantee the laser welding quality, is the laser welding process monitoring and quality control is a laser in the field of important content, including the use of inductance and capacitance, acoustic, optical and other various sensors and processed by computer. According to different welding and requirements, such as seam tracking, defect detection and weld quality monitoring project, through the feedback control of welding process parameters, in order to achieve automatic laser welding. Therefore, laser welding is a highly technical and advanced manufacturing technology.
2 Application of laser welding technology of foreign automobile industry robot
Robot control system is the brain of the robot, which is the main factor that decides the function and performance of the robot. The main task of the industrial robot control technology is the control of industrial robot in the working space position, posture, track, operating sequence and action time, with simple programming, software menu operation, friendly man-machine interface, online operation tips and make the use convenient wait for a characteristic. The application engineering of robot by a single robot workstation to the development of robot production line, robot controller network technology makes of robot production line monitoring, diagnosis and management more convenient.
Robot welding has been widely used in the automobile industry, automobile chassis, seat frame, guide, muffler and torque converter, etc.. Toyota Corporation will spot welding as the standard to equip its Japanese domestic and overseas all spot welding robots. This technique can improve the welding quality, and even try to use it to replace some of the welding operations, at the same time, in a short distance, the movement time is shortened. The company introduced a high degree of low spot welding robot, using it to weld the lower part of the body parts. This small spot welding robot can also be assembled with the higher robot, and the upper part of the body is processed, thus reducing the length of the whole welding line. Car rear bridge, subframe, rocker, suspension, and a vibration damper chassis parts are mostly inert gas shielded arc welding (Metal-Inert gas welding MIG) based stress safety parts, main components by stamping and welding, plate thickness with an average of 1.5 to 4 mm, welding mainly to lap, fillet joints, welding quality requirement is very high, the quality is good or bad directly affect the safety performance of the car. After the application of robot welding, the appearance and inner quality of the welded parts are greatly improved, and the stability of the quality and the reduction of labor intensity are ensured, and the labor environment is improved.
Robot welding on automobile production line
Robot welding on automobile production line
Laser welding equipment is the key to high power laser, there are two major categories, one is a solid state laser, also known as Nd:YAG laser. Nd: YAG laser with wavelength of 1.06 mm, the main advantage is to produce a beam can be transmitted by the optical fiber, so you can save complex beam delivery system, applicable to flexible manufacturing systems or remote processing, usually for the workpieces welding precision requirements are relatively high. Automotive industry output
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