焊接是现代机械制造业中一种必要的工艺方法， 在汽车制造中得到应用。 随着技术的进步，焊接新工艺、新材料、新方法不断运用在汽车制造中，镀层钢板、轻金属材料的焊接 问题，高分子材料、复合材料、异种材料、特种材料对汽车焊接提出了新的挑战。而汽车焊 接过程中的机器人与自动化技术使汽车焊接面貌大为改观。
Welding assembly line
Lujia Tip: The automobile welding production line is mainly white body welding, which is composed of the body frame, the engine cover, the trunk lid, and the left and right door outer panel welding assemblies. The car body skeleton structure is composed of floor welding assembly, left and right front longitudinal beam and wheel cover welding assembly, left and right side wall welding assembly, front wall welding assembly, top cover and front and rear beams, tailgate, left and right rear longitudinal beams And the rear wheel cover welding assembly and the rear wall welding assembly.
The automobile welding production line is mainly white body welding, which is composed of a body frame, a hood, a trunk lid, and a left and right door outer panel welding assembly. The car body skeleton structure is composed of floor welding assembly, left and right front longitudinal beam and wheel cover welding assembly, left and right side wall welding assembly, front wall welding assembly, top cover and front and rear beams, tailgate, left and right rear longitudinal beams And the rear wheel cover welding assembly and the rear wall welding assembly.
Welding is a necessary process in modern machinery manufacturing and is widely used in automobile manufacturing. With the advancement of technology, new welding processes, new materials, and new methods are continuously applied in automobile manufacturing. Welding problems of coated steel sheets and light metal materials, polymer materials, composite materials, dissimilar materials, and special materials have proposed new features for automotive welding. challenge. The robotic and automation technology in the welding process of the car has greatly improved the appearance of the welding of the car.
Automotive welding production line
The common welding principle in the body welding technology is actually liquefying the metal, then cooling it and then dissolving it together. The body of the car is welded by four steel plates from top to bottom and left and right. The ordinary welding is spot welding, and the steel plates are connected together by one welding point. Laser welding uses the high temperature of the laser to disrupt the molecular structure of the two steel plates, and the molecules are rearranged to dissolve the molecules in the two steel plates. So physics, laser welding is to turn two steel plates into one steel plate, so it has higher strength than ordinary welding.
Direct welding equipment refers to welding equipment that uses such equipment to bond workpieces together by welding. Direct welding equipment in automobile manufacturing includes: hanging spot welding machines, automatic welding, spot welding robots, arc welding robots, Medium frequency welding machine, oil tank automatic seam welding machine, fixed nut projection welding machine, stud welding machine, etc.
Automotive welding production line
Resistance welding of automobile body welding includes assembly welding of frame, floor, side wall, door and body assembly, and a large number of resistance spot welding processes are used in the welding production process. According to statistics, there are about 3,000 to 4,000 resistance spot welds on each car body. In the automotive body welding process, the spot welding process is still in a dominant position, and the application of resistance spot welding technology has realized the mass production and automation of automobile body manufacturing.
There are three main types of resistance spot welding equipment used in automobile body welding production lines:
The hanging spot welder is mainly used for the positioning welding station on the body welding production line, or for the welding of components with complex solder joints (not suitable for automation). Manual work, low degree of automation.
The multi-point welding process of the multi-spot welding machine has the advantages of high production efficiency and small welding deformation. The disadvantage is that it cannot adapt to the production of a variety of models, and the flexibility is poor.
Spot welding robot spot welding robots are widely used in modern body welding production lines, which can improve the automation of welding production, reduce the labor intensity of operators, improve production efficiency and ensure welding quality. Spot welding robots are mainly used for repair welding stations for body welding, body assembly welding stations, etc. Moreover, due to the adoption of the spot welding robot, a flexible production method for body welding is realized – multi-variety and low-volume mixed line production.
In the automobile welding production line, the main welding station of the frame, the floor and the like is manually repaired, and the welding station of the sub-frame is divided into the application of the solitary welding robot. Welding processes such as spot welding, projection welding, seam welding, butt welding and arc welding are widely used in the production of automotive parts. For example: beam assembly bracket spot welding, drive shaft balance sheet projection welding, automotive fuel tank seam welding, automotive wheel continuous flash butt welding