Multi-tool approach method for processing small-size addendum circle angle by worm grinding wheel

A technology of worm grinding wheel and addendum circle, which is applied in the field of gear manufacturing, can solve the problem that the worm grinding wheel cannot be trimmed, and achieve the effect of reducing the approximation error and improving the rounding accuracy

Active Publication Date: 2018-05-01
CHONGQING UNIV
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Problems solved by technology

[0005] Aiming at the above-mentioned problem that the worm grinding wheel for processing the small fillet of the addendum cannot be trimmed, the present invention provides a multi-tool approximation method for machining the small fillet of the addendum with the worm grinding wheel, so as to realize the processing of teeth within the allowable range of the given error by using the large fillet worm grinding wheel. top small fillet

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  • Multi-tool approach method for processing small-size addendum circle angle by worm grinding wheel
  • Multi-tool approach method for processing small-size addendum circle angle by worm grinding wheel
  • Multi-tool approach method for processing small-size addendum circle angle by worm grinding wheel

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Embodiment Construction

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

[0020] The multi-tool approximation method for machining the small fillet of the tooth top with the worm grinding wheel, the approximation principle is as follows figure 1 As shown, firstly determine the rack point vector for processing the large fillet at the tooth top, the radius of the large fillet is R, and the large fillet equation (X1, Y1) is:

[0021]

[0022] The normal vector (Nx, Ny) of the large fillet tooth profile is:

[0023]

[0024] where: R a Indicates the radius of the addendum circle, R indicates the rounding radius, α is the solution parameter of the coordinates of the center of the circle, θ1 indicates the arc angle on the addendum circle, and θ2 indicates the arc angle on the involute line of the tooth profile. Substitute into the meshing equation:

[0025]

[0026] in represents the tooth profile n...

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Abstract

The invention belongs to the field of gear manufacture, and relates to a multi-tool approach method for processing a small-size addendum circle angle by a worm grinding wheel. The problem that the worm grinding wheel can not be trimmed since a radius of curvature is too small when the small-size addendum circle angle is processed. Through the translation of the X shaft and the Y shaft of the wormgrinding wheel, multiple sections of curves are processed, a circle angle curve is enveloped by the multiple sections of curves, a point vector pairing method is put forward, the offset of the X shaftand the Y shaft of the grinding wheel is solved, the principle errors of the approach method are analyzed, and an optimal approach circular arc size and approach tool number can be established according to error upper limits required during design.

Description

technical field [0001] The invention belongs to the field of gear manufacturing, and relates to an approximation method of enveloping a small circular arc with multiple large circular arcs, which solves the problem that the minimum radius of curvature of the worm grinding wheel is smaller than the radius of the roller when processing small-sized addendum fillets (hereinafter referred to as small fillets). Problems that cannot be fixed. 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 importa...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17
Inventor 李国龙任唯贤何坤董鑫徐凯
Owner CHONGQING UNIV
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