Automatic welding production line for automobile industry
Automobile welding production line is mainly body in white welding, which is composed of body frame, engine hood, trunk cover, left and right door panel welding assembly. The frame structure of the car body is composed of floor welding assembly, left and right front rail and wheel housing welding assembly, left and right side girdle welding assembly, front girdle welding assembly, top cover and front and rear beams, tailgate, left and right rear rail and rear wheel housing welding assembly, rear girdle welding assembly.
Automobile welding production line is mainly body in white welding, which is composed of body frame, engine hood, trunk cover, left and right door panel welding assembly. The body frame structure is composed of floor welding assembly, left and right front rail and wheel welding assembly, left and right side girdle welding assembly, front girdle welding assembly, top cover and front and rear beams, tailgate, left and right rear rail and rear wheel cover welding assembly, and rear girdle welding assembly.
Welding is a necessary process in modern machinery manufacturing industry, which is widely used in automobile manufacturing. With the progress of technology, new welding process, new materials, new methods are constantly used in automobile manufacturing, coating steel plate, light metal material welding problems, polymer materials, composite materials, heterogeneous materials, special materials to automobile welding put forward new challenges. The robot and automation technology in the process of automobile welding greatly changed the appearance of automobile welding.
In the body welding technology includes the common welding principle which is to liquefy the metal and then cool it and melt it together. The body of a car is made up of four welded steel plates. Common welding is spot welding, which connects the steel plates together through a solder joint. Laser welding is to use the high temperature of the laser, the molecular structure of the two plates are disrupted, the molecules are rearranged so that the molecules in the two plates are dissolved into one. So physically speaking, laser welding turns two pieces of steel into one piece, and therefore has a higher strength than normal welding.
Direct welding equipment refers to the use of such equipment parts together by means of welding welding equipment, directly in the automobile manufacturing welding equipment class includes: hanging spot welding machine, automatic welding, spot welding, arc welding robots, robot intermediate tank welding machine, automatic seam welding machine, fixed nut convex welding machine, stud welding machine, etc.
Resistance welding Auto body assembly welding includes assembly welding of frame, floor, side circumference, door and body assembly, etc. Resistance spot welding technology is widely used in the process of assembly welding. According to statistics, each car body, there are about 3000~4000 resistance spot welding spots. In the automobile body welding process, spot welding process is still in the leading position. The application of resistance spot welding technology has realized the mass production and automation of automobile body manufacturing.
The resistance spot welding equipment used in the auto body assembly and welding production line is mainly divided into the following three categories:
Suspension spot welders are mainly used for positioning welders on body assembly and welding lines, or for welding parts with complex joint positions (not suitable for automation). Manual operation, low degree of automation.
Multi-spot welding technology has the advantages of high production efficiency and small welding deformation. Its disadvantage is that it can not be adapted to the production of a variety of models, poor flexibility.
Spot welding robot is widely used in the modern body assembly and welding production line, which can improve the degree of automation of assembly and welding production, reduce the labor intensity of the operator, improve the production efficiency, and ensure the quality of welding. Spot welding robot is mainly used for repair welding station of body assembly welding, body assembly welding position and so on. Moreover, WITH THE USE OF SPOT WELDING ROBOT, THE FLEXIBLE PRODUCTION mode OF body assembly welding IS realized - multi-variety and less batch mixed line production.
In the automobile body assembly and welding production line, manual repair welding is mainly carried out in the main welder position of the frame and floor, and welding robot is applied in the welding station of sub-assembly parts of the subframe.
Spot welding, projection welding, seam welding, butt welding and arc welding are widely used in automobile parts production line. For example: beam assembly bracket spot welding, drive shaft balance sheet projection welding, automotive fuel tank seam welding, automotive wheel ring continuous flash butt welding, automotive steering arm, muffler, purifier housing arc welding.
