1. Cold precision forging
The unheated metal material is directly forged, mainly including cold extrusion and cold extrusion.
Cold precision forging technology is more suitable for multi-variety and small-volume production. It is mainly used to manufacture various parts of automobiles and motorcycles and some tooth-shaped parts.
2, hot precision forging
The forging of Henan Chalco Aluminum-aluminum alloy is mainly referred to as the precision forging forming process above the recrystallization temperature. Most of the hot forging forming processes adopt closed die forging, which requires high precision for molds and equipment. The blank volume must be strictly controlled during forging. Otherwise, the mold is easy to generate large pressure. Therefore, when designing closed die forging dies, it is usually used. The shunt step-down principle is used to solve this problem.
At present, most of the straight bevel gears used in China's trucks are produced by this method.
3, warm precision forging
It is a precision forging process performed at a suitable temperature below the recrystallization temperature. However, the forging temperature of warm forging is divided into narrow, high requirements on the mechanics of the mold material and the mold itself, and it is usually necessary to use special high-precision forging equipment.
The warm precision forging process is generally suitable for mass production and forging medium yield strength materials.
4, occlusion forging
The forming process of the precision forgings without flash is obtained by one- or two-way double-acting extrusion metal forming in one or two punches in the closed die.
Mainly used in the production of bevel gears, car, constant velocity joints, star sleeves, pipe joints, cross shafts, bevel gears and other products.
5, isothermal forging
The blank is forged at a constant temperature.
Used for deformation temperature sensitive, difficult to form metal materials and parts, such as titanium alloy, aluminum alloy, thin web, high reinforcement.
6, split forging
A shunting or shunting channel is formed in the forming part of the blank or mold to ensure material filling.
Split forging is mainly applied to the cold forging forming process of spur gears and helical gears.