Welding methods used in the automotive industry

The automobile manufacturing industry is one of the industries with the widest application of welding, and the welding methods used are also diverse. Their application is as follows:

1.1 Resistance welding

(1) Spot welding is mainly used for body assemblies, floors, doors, side panels, rear panels, front
axles and small parts, etc.

(2) Multi-spot welding is used for body floors, truck compartments, doors, engine covers and
trunk covers, etc.

(3) Projection welding and roll projection welding are used for body parts, shock absorber valve stems, brake shoes,
screws, nuts and small brackets, etc.

(4) Seam welding is used for body roof rain canopies, shock absorber heads, fuel tanks, mufflers and
oil pans, etc.

(5) Butt welding is used for steel rims, exhaust and intake valve stems, cutting tools, etc.

1.2 Arc welding

(1) CO2 shielded welding is used for welding of car boxes, rear axles, frames, shock absorber valve stems, crossbeams,
rear axle shells, drive shafts, hydraulic cylinders and jacks, etc.

(2) Argon arc welding is used for welding and repairing oil pans and aluminum alloy parts.

(3) Electrode arc welding is used for thick plate parts such as brackets, spare tire racks, frames, etc.

(4) Submerged arc welding is used for half-bridge sleeves, flanges, pressure vessels of natural gas vehicles, etc.

1.3 Special welding

(1) Friction welding is used for automobile valve stems, rear axles, half shafts, steering rods and on-board tools

(2) Electron beam welding is used for gears, rear axles, etc.

(3) Laser welding is used for body floors, gears, parts cutting and trimming, etc.

1.4 Oxyacetylene welding

Used for repairing body assemblies.

1.5 Brazing

Used for welding radiators, copper and steel parts, and cemented carbide.