What are the General Manufacturing Technologies for Auto Parts?

There are about 10,000 parts in a car, each part is manufactured by a different processes, to be assembled in a car. There are seven general auto parts manufacturing technologies as below.

– Casting
Casting is to molten metal pour into a mould, after cooling and setting, and then get the parts or blank. Such as cylinder block, gearbox, steering gear housing, rear axle housing, brake drum, various bracket, etc.

– Forging
Forging is divided into free forging and model forging. Blanks for gears and shafts of cars is free forging. Mould forgings for cars: engine connecting rod and crankshaft, automobile front axle, steering knuckle, etc.

– Cold stamping
Cold stamping is make sheet metal in the punching die under pressure to be cut off or shaped. The parts processed by cold stamping are engine oil sump, brake backing plate, car frame and most body parts. Stamping processing has high productivity, and can make complex shape and high precision parts.

– Weld
Welding is to heat two pieces of metal locally or simultaneously, and pressurized to be joined together. In car body manufacturing, spot welding is widely used. Spot welding is suitable for welding thin steel plates.

– CNC Machining
Metal cutting is to use a tool to remove the excess metal in the blank, make the workpiece get the required shape, size and surface roughness. Main metal cutting methods: Turning, planing, milling, drilling, boring, grinding, etc.

– Heat treatment
Generally Heat treatment is added onto Steel Parts, through a certain heating, heat preservation and cooling process, to change its internal structure, to get the required performance. Heating temperature, holding time and cooling speed, can made steel produce different microstructure changes.

– Assemble
Assemble is according to specified technical requirements, use the connecting parts (bolt, nut, pin, or clasp, etc), connect various parts to each other and built-up component. Then connect component to form a complete vehicle.