Multi-tool approximation method for machining small-sized addendum fillets with worm grinding wheel

A worm grinding wheel, small size technology, applied in geometric CAD, special data processing applications, etc., can solve the problem of worm grinding wheel not being able to dress

Active Publication Date: 2021-05-14
CHONGQING UNIV
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  • Abstract
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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 approximation method for machining small-sized addendum fillets with worm grinding wheel
  • Multi-tool approximation method for machining small-sized addendum fillets with worm grinding wheel
  • Multi-tool approximation method for machining small-sized addendum fillets with worm grinding wheel

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Embodiment Construction

[0019] The present invention will be described in further 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, first determine the rack point vector of the large fillet on the processing tooth top, the radius of the large fillet is R, and the large fillet equation (X 1 , Y 1 )for:

[0021]

[0022] Large fillet tooth profile normal vector (N x , N y )for:

[0023]

[0024] where: R a Indicates the radius of the addendum circle, 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 normal vector, Indicates the relat...

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Abstract

The invention belongs to the field of gear manufacturing, and relates to a multi-tool approach method for machining small-sized addendum fillets by a worm grinding wheel, which solves the problem that the worm grinding wheel cannot be trimmed due to too small curvature radius when machining small-sized addendum fillets. Through the translation of the X-axis and Y-axis of the worm grinding wheel, a multi-segment curve is processed, and a fillet curve is enveloped by the multi-segment curve. A point-vector pairing method is proposed to solve the offset of the grinding wheel's X-axis and Y-axis, and analyze According to the principle error of the approximation method, the optimal approximation arc size and the number of approximation knives are established according to the upper limit of the error required by the 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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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17
CPCG06F30/17
Inventor 李国龙任唯贤何坤董鑫徐凯
Owner CHONGQING UNIV
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