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Precision forging forming technology and its application
Precision forging forming technology, also known as near-net or near-net forming technology refers to the parts after forming, only a small amount of processing or no longer processing, can be used as mechanical components forming technology. In the production practice, people are accustomed to precision forging forming technology is divided into: cold precision forging forming, hot forging forming, temperature forging forming, composite forming, occlusion forging, isothermal forging, diversion forging.
1, cold precision forging forming, will not heat the metal material directly forging, including cold extrusion and cold forging squeeze. Cold forging forming technology is more suitable for multi-species small batch production, mainly used to manufacture cars, motorcycles, a variety of parts and some tooth-shaped parts.
2, hot forging forming, mainly refers to the recrystallization temperature above the precision forging forming process. Hot forging forming process mostly closed die forging, mold and equipment, high precision, forging blank volume must be strictly controlled, or easy to produce a greater pressure inside the mold, so the design of closed die forging, the usual use of Shunt buck principle to solve this problem. At present, most of the straight bevel gears used in our trucks are produced by this method.
3, the temperature forging forming, is a temperature below the recrystallization temperature of a suitable precision forging forming process. However, the forging temperature of warm forging is divided into narrow, the mold material mechanics and mold itself is high, usually require the use of specialized high-precision forging equipment. Warm forging process is generally more suitable for mass production, forging intermediate yield strength materials.
4, composite forming is mainly cold, warm, hot and other forging process together, learn from each other to achieve the desired results. Composite forming is a variety of gears, fittings and other high-strength parts of the standard forging method.
5, occlusion forging is in a closed die by one or two punch one-way or two-way reversing extrusion metal forming, no flash forging of the forming process. Mainly used in the production of bevel gears, car constant velocity joints star sets, pipe joints, cross shaft, bevel gears and other products.
6, isothermal forging refers to the blank at a constant temperature forging forging. For deformation temperature sensitive, difficult to shape metal materials and parts, such as titanium alloy, aluminum alloy, thin web, high tendons.
7, diversion Forging is in the blank or mold the formation of a material part of the shunt or shunt channel, in order to ensure the material filling effect. Split forging is mainly used in cold forming process of spur gears and helical gears.