What is the manufacturing process of gears?

　　Many people don't know how the gears, which are widely used in various mechanical equipment, are processed and produced.Gear processing is a relatively complicated process, and therefore, many gears produced are of poor quality and fail to meet the required accuracy standards.

1. Forging billet

　　Hot die forging is still a widely used rough forging process for automotive gear parts.In recent years, cross wedge rolling technology has been widely promoted in shaft machining.This technology is particularly suitable for making blanks for more complex stepped shafts. It not only has high precision, small subsequent machining allowances, but also high production efficiency.

　　2. Normalizing

　　The purpose of this process is to obtain the hardness suitable for the subsequent gear cutting and prepare the organization for the final heat treatment, so as to effectively reduce the heat treatment deformation.The material of the gear steel used is usually 20CrMnTi. Normal normalizing is greatly affected by personnel, equipment and the environment, making it difficult to control the cooling rate and uniformity of the workpiece, resulting in large differences in hardness and uneven metallographic structure. Affect metal cutting and final heat treatment, making thermal deformation large and irregular, and the quality of parts cannot be controlled.To this end, an isothermal normalizing process is adopted.Practice has proved that the use of isothermal normalizing has effectively changed the shortcomings of normal normalizing, and the product quality is stable and reliable.

　　3. Turning

　　In order to meet the positioning requirements of high-precision gear processing, all the gear blanks are processed by CNC lathes, and the turning tools are mechanically clamped without heavy grinding. The processing of the aperture, end face and outer diameter in one clamping is achieved simultaneously, which not only ensures the internal The perpendicularity requirements of the hole and the end face ensure the small size dispersion of the mass production of tooth blanks.Therefore, the precision of the gear blank is improved and the processing quality of the subsequent gears is ensured.In addition, the high efficiency of CNC lathe processing also greatly reduces the number of equipment, and the economy is good.

　　4. Rolling and shaping

　　Common gear hobbing machines and gear shaping machines are still widely used for processing gears. Although it is easy to adjust and maintain, the production efficiency is low. If a large capacity is completed, multiple machines are required to produce at the same time.With the development of coating technology, the re-coating after sharpening of hobs and inserts is very convenient. Coated tools can significantly increase the service life, generally by more than 90%, which effectively reduces the number of tool changes. And sharpening time, the benefit is significant.

　　5. Shaving

　　Radial gear shaving technology is widely used in the production of high-volume automobile gears due to its high efficiency, easy realization of the modification requirements of the designed tooth profile and tooth direction.

　　6. Heat treatment

　　Automobile gears require carburizing and quenching to ensure their good mechanical properties.For products that no longer undergo gear grinding after heating, stable and reliable heat treatment equipment is essential.

　　7. Grinding

　　It is mainly to finish the heat-treated gear inner hole, end face, shaft outer diameter and other parts to improve the dimensional accuracy and reduce the form and position tolerance.

　　The above is an introduction to the gear processing process. The above is just a brief overview of the steps. There are many things that need attention in the actual process of telling you. It is difficult to say clearly in a few words. These details need to be studied by yourself. Produce high-quality, high-precision gears.