Method and device for precisely rolling and forming cylindrical gear

Abstract

The invention provides a method and a device for precisely rolling and forming a cylindrical gear. The method includes steps of S1, obtaining an annular blank; S2, disposing the annular blank in a driving roll; S3, setting an upper retaining plate and a lower retaining plate at the upper end and the lower end of the blank; S4, disposing a core roll in the blank; S5, enabling the driving roll and the blank to rotate around the central axis of the blank, and enabling the core roll to do linear feed motion along the radial direction of the blank; and S6, stopping feeding of the core roll and taking out of the formed cylindrical gear when the inner diameter of the blank of the gear reaches the preset value; wherein the diameter of the core roll is smaller than the inner diameter of the upper retaining plate and the lower retaining plate. The device comprises the driving roll (1), the core roll, the upper retaining plate (4), the lower retaining plate (5), a rotary driving device and a linear driving device. The cylindrical gear is integrally formed at one step by continuous local plastic deformation, and has the advantages that energy and materials are remarkably saved, production cost is reduced, and productivity and product performance effect are improved.

Description

technical field [0001] The invention relates to the field of manufacturing cylindrical gears, in particular to a method and device for precision rolling forming of cylindrical gears. Background technique [0002] Cylindrical gears are one of the key basic parts in modern industrial production, and are widely used in machinery, automobiles, trains, ships, metallurgy, chemicals, energy, aerospace and other industrial fields. For high-performance cylindrical gears, it not only requires high geometric accuracy, but also requires high internal microstructure performance, which puts forward more stringent requirements for its manufacturing quality. There are currently two main manufacturing methods for cylindrical gears. One is special machine tool cutting. This method has low material utilization rate, low production efficiency, high cost, and destroys the metal flow line of the tooth surface, reducing the mechanical performance and service life of the gear. The second is forg...

AI Technical Summary

Problems solved by technology

Although this method has high material utilization rate, higher production efficiency and manufacturing quality than cutting processing, it has limited forming ability, high deformation resistance, low mold life, and difficult tooth profile filling.

Images