Bevel and hypoid gear and method of manufacture

A gear tooth and gear technology, which is applied in the field of net-shape bevel gears and hypoid gears, can solve the problems of cutting allowance material waste, tooth surface strength reduction, lengthy processing time, etc., to prolong the life of equipment and tools, wear resistance The effect of reducing sex and noise and vibration and improving process productivity

Inactive Publication Date: 2011-06-22
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of gear cutting processing are: high cost, lengthy processing time, low throughput, waste of cutting allowance material and reduced tooth flank strength
[0008] Disadvantages of the gear forging process are the multiple forging and reheating steps during which scale formation and decarburization of the steel can occur, the use of high forming pressures resulting in low tool life and the inclusion of adjustments resulting in lengthy processing times and high costs Post-forging operations for sizing, machining and heat treatment

Method used

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  • Bevel and hypoid gear and method of manufacture
  • Bevel and hypoid gear and method of manufacture
  • Bevel and hypoid gear and method of manufacture

Examples

Experimental program
Comparison scheme
Effect test

no. 2 approach -

[0109] First and Second Embodiments - Orbital Forming

[0110] In the gradually deformed first embodiment, refer to Figure 3A , shows a gear component 10 formed by orbital forging, also known as orbital forming. Apply sufficient pressure locally to the base 58 and transition portion 52 of the blank 50 by repeatedly orbiting Figure 2A shown in ) to gradually deform the gear blank 50 (not shown, see Figure 2A ) form the gear part 10. The first tool 100 or tool assembly 106 (wherein, hereinafter, "tool 100" refers to the Tool 100 or tool assembly 106 ) applies pressure that deforms gear blank 50 . The first tool 100 is fixed axially 112 and moves according to at least one of orbital, arc tooth, planetary or linear motion 114 to repeatedly exert pressure on the gear blank 50 so that the blank 50 rests against the contour of the first tool 100 deform and enter the cavity or profile of the second tool 102 . As the first tool 100 is advanced axially 116 toward the second t...

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PUM

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Abstract

Bevel and hypoid gears are used in power transmissions including automotive applications. Provided is a net shaped bevel or hypoid gear having a generally annular gear body including a plurality of radially outwardly extending gear teeth formed from a generally annular blank made of powdered metal. Also provided is a method for manufacturing a net shaped bevel or hypoid gear including the steps of providing and optionally heat treating a generally ring-shaped or annular blank made of metal powder, then incrementally deforming the blank by orbitally forming or roll forming to produce a net shaped gear member with a plurality of outwardly extending gear teeth, which may be of a bevel or hypoid type.

Description

technical field [0001] The present invention relates to net shape bevel and hypoid gears, and more particularly, to bevel or hypoid gears formed from metal powder and methods of making the same. Background technique [0002] Bevel ring (bevel ring) gears are well known and commonly used in power transmission applications. Known bevel gears include spiral bevel gears, spiral bevel gears, hypoid gears, and the like. Spiral bevel ring gears typically have a generally annular gear body with a face that includes a plurality of radially outwardly extending gear teeth. The form of gear teeth may be, for example, one of linear, curved (helical) and hyperboloid. [0003] Although the general form of a hypoid gear is similar to that of a spiral bevel gear, a hypoid gear is distinguished by having curved and beveled helical teeth, where the pitch faces of the teeth are hyperboloids of revolution, hence the name. Hypoid gears operate on non-intersecting axes, which may be at right an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/08F16H55/17
CPCF16H55/06B22F5/08Y10T74/19958Y10T29/49476
Inventor L·C·列夫L·B·阿克塞诺夫V·N·沃斯特罗夫
Owner GM GLOBAL TECH OPERATIONS LLC
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