The workpiece processed by precision forming technology can meet the requirements of parts with little or no processing, so precision forming technology is also called net forming technology or near net forming technology. On the basis of traditional plastic forming, combined with the research results of automation, computer, new energy, new materials and other aspects, this technology makes the metal plastic forming process develop in the direction of high precision, high efficiency and high quality. There are two main ways to realize precision forming technology: one is to improve the forming accuracy by introducing new equipment, new process or new die; Second, based on the existing forming equipment, research and improve the forming process parameters or forming die to achieve. Precision forming technology mainly includes precision stamping, powder metallurgy, precision casting, precision die forging and so on. As a new technology with great development prospect, precision forging technology of spiral bevel gear is attracting more and more attention.
Precision forging technology of gear refers to the technology of using precision forging technology to make plastic deformation of metal blank, so as to obtain qualified gear. The gear obtained by precision forging technology has a more accurate tooth profile, and it can be used as a finished product only by a small amount of finish machining on the tooth surface. In the process of precision forging, the metal deforms plastically under the action of high stress, the gear microstructure is dense, and the metal flow line is continuous. The fatigue strength and wear resistance of precision forged gear are much higher than those of machined gears, which is more suitable for frequent impact and heavy load conditions. In recent years, the precision forging technology of gear has developed rapidly with the continuous improvement of part requirements. Compared with traditional cutting, it has significant advantages, mainly including the following aspects:
1) High precision of formed parts. It can be directly used as finished parts or qualified parts can be obtained with only a small amount of subsequent processing.
2) It can efficiently process parts and new products with complex structure in large quantities.
3) The product has good mechanical properties. The metal streamline distribution in the workpiece is reasonable, the microstructure is dense, which can significantly improve the mechanical properties and wear resistance, and the service life of the product is long.
4) Compared with the traditional cutting process, it effectively reduces the consumption of raw materials and energy, and improves the production efficiency.