Double splicing curvilinear type gear hob

A gear hob and curved technology, which is applied in gear tooth manufacturing tools, gear tooth manufacturing devices, belts/chains/gears, etc., can solve the problem of weak tooth root strength of gears

Pending Publication Date: 2019-07-26
NANJING HIGH SPEED GEAR MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the hob usually adopts a full-arc structure, and the tooth root of the gear machined by this type of tool is weak

Method used

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  • Double splicing curvilinear type gear hob

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Such as figure 1 As shown, a double curved gear hob includes a plurality of hob teeth 100 . The tooth profile of the hob tooth 100 includes: the first dedendum straight line AB, the first main cutting straight line BC, the first auxiliary cutting straight line CD, the first addendum curve DF, and the second addendum curve D'F connected in sequence. , the second auxiliary cutting straight line C'D', the second main cutting straight line B'C' and the second dedendum straight line A'B'.

[0021] The first addendum curve DF is connected to the first secondary cutting straight line CD and is tangent at the connection point. Specifically, the first addendum curve DF and the first secondary cutting straight line CD are connected at point D, or the connection point is point D. The first addendum curve DF is tangent to the first secondary cu...

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Abstract

The invention discloses a double splicing curvilinear type gear hob comprising a plurality of hob teeth. The tooth-shaped contour line of each hob tooth comprises a first tooth root straight line, a first main cutting straight line, a first auxiliary cutting straight line, a first tooth top curve, a second tooth top curve, a second auxiliary cutting straight line, a second main cutting straight line and a second tooth root straight line which are connected sequentially, wherein the first tooth top curve and the first auxiliary cutting straight line are connected and are tangential at the connection point, the second tooth top curve and the second auxiliary cutting straight line are connected and are tangential at the connection point, the first tooth top curve and the second tooth top curve are connected and are tangential at the connection point, the first tooth top curve is composed of a first top arc and a first bottom arc which are connected, the second tooth top curve is composedof a second top arc and a second bottom arc which are connected, the first top arc is connected to the second top arc, the first bottom arc is connected to the first auxiliary cutting straight line, and the second bottom arc is connected to the second auxiliary cutting straight line. The double splicing curvilinear type gear hob has the beneficial effects that a machined gear has high tooth root strength.

Description

technical field [0001] The invention relates to a gear hob, especially a gear hob suitable for processing involute gears. Background technique [0002] For involute gears, especially gears used for heavy-duty transmission, the strength of the dedendum is often the main factor limiting the transmission capacity. The weakest link. Improving the tooth root stress distribution can improve the bearing capacity of the product, and optimizing the gear root transition curve can effectively improve the tooth root stress distribution. [0003] In production, gear hobbing is the most widely used. At present, the hob usually adopts a full-arc structure, and the tooth roots of gears processed by this type of tool are relatively weak. Contents of the invention [0004] In order to solve the deficiencies in the prior art, the present invention provides a double-split curved gear hob, which can produce a larger hob addendum curvature radius than the full-arc hob head structure. The in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23F21/16
CPCB23F21/16
Inventor 郭华杰熊永强曹洪
Owner NANJING HIGH SPEED GEAR MFG
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