Spiral bevel gear swing rolling formation method

Abstract

The invention discloses a spiral bevel gear swing rolling formation method. A spiral bevel gear is formed in a swing rolling manner by a swing rolling mold; the swing rolling mold includes a swing head and a swing rolling lower mold oppositely arranged up and down; the swing head performs a circular trajectory motion; the swing rolling lower mold performs an upward linear feeding motion; and the swing rolling formation method comprises the following steps: a spiral bevel gear blank is placed between the swing head and the swing rolling lower mold; a tooth shape of the spiral bevel gear is formed through swinging of the swing head; and the spiral bevel gear and a back part opposite to the tooth shape are formed by the swing rolling lower mold. The spiral bevel gear swing rolling formation method can refine grains and densify streamlines to greatly improve the gear mechanical performances, is low in forming force, high in tooth shape precision, long in mold life and liable to demold, and has the advantages of high production efficiency, high material utilization rate and low cost.

Description

technical field [0001] The invention belongs to the technical field of gear forming and manufacturing, and in particular relates to a method for forming spiral bevel gears by swing rolling. Background technique [0002] Spiral bevel gears are the most complex gears in geometry and transmission. They have significant advantages such as high transmission efficiency, large overlap coefficient, high load capacity, stable transmission, long life, and low noise. They are widely used in aviation, aerospace, ships, high-speed rail, wind power, It is widely used in high-end equipment fields such as high-end automobiles and high-end machine tools. The complex geometry of the spiral bevel gear poses a serious challenge to its manufacture. If it is manufactured by integral die forging, it will face the following three bottleneck problems: (1) Due to the complex tooth shape of the spiral bevel gear, it is easy to have difficulty in metal flow during the forming process. Deformation dead...

AI Technical Summary

Problems solved by technology

The complex geometry of the spiral bevel gear poses a serious challenge to its manufacture. If it is manufactured by integral die forging, it will face the following three bottleneck problems: (1) Due to the complex tooth shape of the spiral bevel gear, it is easy to have difficulty in metal flow during the forming process. Deformation dead zone, so the tooth shape is difficult to fill; (2) The forming force is large, the tooth shape accuracy is low, and the mold life is low; (3) Because the tooth shape is helical, it is difficult to demold the gear after forming

However, there is currently no design for spiral bevel gears whose complex tooth profiles are formed by complex dynamic oscillating head oscillations.

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