Tooth crest rounding method

A technology of tooth top circle and tooth top, which is applied in the direction of gear teeth, components with teeth, belts/chains/gears, etc., can solve the problems of low efficiency and poor quality, and achieve high efficiency, good surface quality, and easy realization Effect

Active Publication Date: 2018-02-23
CHONGQING UNIV
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Problems solved by technology

[0007] Aiming at the above-mentioned problem of low efficiency and poor quality of manual grinding of tooth tip rounding, the present invention provides a tooth tip rounding m

Method used

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] According to the specific gear parameters and rounding radius, determine the starting point coordinates, end point coordinates and center position of the arc. like figure 2 , the position of the center of the circle can be expressed in two ways according to the normal vector of the tooth profile and the normal vector of the addendum circle, and the results of the two are equal, so the equation is established:

[0023]

[0024] Substituting the involute equation and addendum circle equation into (1):

[0025]

[0026] where R b Indicates the radius of the involute base circle, R a Indicates the radius of the addendum circle, R indicates the rounding radius, α indicates the arc angle on the addendum circle, and θ indicates the arc angle on the involute line of the tooth profile. Solve formula (2) to get θ and α, and su...

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Abstract

The invention belongs to the field of gear manufacturing, relates to a design method for calculating a grinding wheel profile according to a gear profile and provides a novel tooth crest rounding method. The problem is solved that tooth crest rounding needs manual grinding at present. The tooth crest rounding method adopts a special rounding grinding wheel to machine tooth crest round corners on aworm grinding wheel gear-grinding machine. Compared with a traditional manual grinding for tooth crest rounding, the machining efficiency and machining quality are greatly improved. Firstly, an independent tooth crest rounding process needing to be performed after gear machining completion is analyzed according to a present-stage gear manufacturing process, and then the design method for calculating a special grinding wheel profile according to geometric parameters of a gear and rounding size is proposed.

Description

technical field [0001] The invention belongs to the field of gear manufacturing, relates to a design method for calculating a sand profile according to a tooth profile, solves the problem that tooth tip rounding still needs manual grinding, and proposes a new gear manufacturing process. Background technique [0002] A lot of theory and practice have shown that the edge angle of the gear will easily cause the tooth surface to protrude due to small bumps, which will generate noise and damage the meshing tooth surface, and this edge angle will easily cause stress concentration during the heat treatment process and affect the mechanical properties of the gear. The gears are prone to fatigue wear and reduce the life of the gears. Therefore, in the field of gear manufacturing, chamfering and rounding the gear has become an important process. [0003] Gear rounding is divided into tooth profile rounding and addendum rounding. Tooth profile rounding is usually processed on the cha...

Claims

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Application Information

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IPC IPC(8): B23F19/12
CPCB23F19/125
Inventor 李国龙任唯贤何坤徐凯董鑫
Owner CHONGQING UNIV
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