Welding methods and components used in the automotive industry

The automotive industry is one of the most widely used in welding applications, and the welding methods used are also numerous. The applications are as follows:

Resistance welding

(1) Spot welding is mainly used for body assembly, floor, door, side wall, rear wall, front axle and small parts. (2) Multi-spot welding is used for underbody, truck compartments, doors, hoods and trunk lids. (3) Projection welding and spheroidal welding are used for body parts, shock absorber stems, brake shoes, screws, nuts and small brackets. (4) Seam welding is used for the roof cover rain cover, shock absorber head, fuel tank, muffler and oil pan. (5) Butt welding is used for steel rings, exhaust valve stems, tools, etc.

2. Electric arc welding

(1) CO2 protection welding is used for welding of car boxes, rear axles, frame, shock absorber valve stems, cross beams, rear axle shell pipes, drive shafts, hydraulic cylinders and jacks. (2) Argon arc welding is used for welding and repair welding of oil pan and aluminum alloy parts. (3) Welding rod arc welding is used for thick plate parts such as brackets, spare tire frames, and frame. (4) Submerged arc welding is used for half-bridge casings, flanges, pressure vessels for natural gas vehicles, etc.

3. Special welding

(1) Friction welding is used for automotive valve stems, rear axles, axles, steering rods and on-board tools. (2) Electron beam welding is used for gears, rear axles, and the like. (3) Laser welding is used for underbody, gears, parts blanking and trimming.

4. Oxyacetylene welding

Used for repair welding of body components.

5. Brazing

Used for welding of heat sinks, copper and steel, and hard alloys.

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