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Female die for forming crowned teeth

A technology of drum-shaped teeth and concave die, applied in the direction of metal extrusion die, can solve the problems of low processing efficiency and low material utilization rate, and achieve the effect of high precision and high efficiency

Pending Publication Date: 2020-10-30
重庆众联齿轮传动有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, crown-shaped teeth can be processed by cutting or grinding, but these processing methods have low material utilization and low processing efficiency

Method used

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  • Female die for forming crowned teeth
  • Female die for forming crowned teeth
  • Female die for forming crowned teeth

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Experimental program
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Effect test

Embodiment Construction

[0018] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0019] Such as figure 1 and 2 As shown, a die for forming drum-shaped teeth, its main structure includes a die body 1, the die body 1 has a central inner hole 1a, and a ring-shaped mold core is provided on the wall of the central inner hole 1a 2. The inner ring of the core 2 has forming teeth 21. The core 2 is composed of three parts, the upper forming section 2a, the middle forming section 2b and the lower forming section 2c arranged in sequence in the axial direction. The elastic modulus of the middle forming section 2b Less than the modulus of elasticity of the upper molding section 2a and the lower molding section 2c, in the present embodiment, the material of the middle molding section 2b is Cr12MoV (cold work die steel), and its compressive strength is 3.4GPa, and the upper molding section 2a and the lower molding section The material of 2c is YG15 (t...

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Abstract

The invention discloses a female die for forming crowned teeth. The female die comprises a female die body, the female die body is provided with a central inner hole, a die core of an annular structure is arranged on the inner wall of the central inner hole, the die core comprises an upper forming section, a middle forming section and a lower forming section which are sequentially arranged in theaxial direction of the die core, the elastic modulus of the middle forming section is smaller than that of the upper forming section and that of the lower forming section, and forming teeth are arranged on an inner ring of the die core. The female die has the beneficial effects that the crowned teeth can be quickly formed through an extrusion means, so that the production efficiency of a crowned tooth gear is improved.

Description

technical field [0001] The invention relates to a gear processing mold, in particular to a concave mold for forming drum-shaped teeth. Background technique [0002] The tooth shape of the gear has various forms. In order to improve the meshing accuracy of the gear and reduce the meshing noise, the tooth shape of some gears is a drum-shaped tooth, that is, the tooth is a curved tooth profile in the working circular section, such as the planetary reducer. For drum-shaped teeth, in the tooth width direction of the tooth, the middle part of the tooth is higher than the two ends of the tooth, that is to say, the tooth thickness dimension of the middle part of the tooth is greater than the tooth thickness dimension of the two ends of the tooth. [0003] In the prior art, crown-shaped teeth can be processed by cutting or grinding, but these processing methods have low material utilization rate and low processing efficiency. For this reason, it is very necessary to design a mold th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02
CPCB21C25/02B21C25/025
Inventor 夏子琪付森涛
Owner 重庆众联齿轮传动有限公司