Involute spline spline tooth modification design method and processing method and gear product thereof

A technology of involute splines and involute external splines, which is applied in the field of gear manufacturing, can solve the problems of reduced axial fit length, reduced contact area, and reduced centering accuracy, so as to reduce eccentric loads, The effect of not generating chips and avoiding wear and tear failure

Active Publication Date: 2022-08-09
HANDE AXLE (ZHUZHOU) GEAR CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art when gear splines are processed, the tooth surfaces of the inner and outer splines contact with each other mainly at the highest point of the drum shape, and the contact area is greatly reduced, resulting in increased unit load and wear failure; and inner and outer splines The reduction of the axial fit length of the spline teeth leads to a decrease in the centering accuracy. The present invention provides a modification design method and processing method of the involute spline teeth, which improves the contact load distribution of the tooth surface and reduces the The eccentric load is avoided, and the wear failure caused by the increase of the load per unit area is avoided; the sufficient axial matching length of the key teeth is ensured, thereby ensuring the centering accuracy of the spline fit

Method used

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  • Involute spline spline tooth modification design method and processing method and gear product thereof
  • Involute spline spline tooth modification design method and processing method and gear product thereof
  • Involute spline spline tooth modification design method and processing method and gear product thereof

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Embodiment 1

[0034] like figure 1 and figure 2 As shown in the figure, this embodiment discloses a method for modifying the shape of an involute spline spline tooth, which includes modifying the tooth direction of the tooth surface of the two key teeth of the key tooth, the tooth top and the tooth root at both ends; The tooth surfaces of the key teeth are in contact with each other at the middle section of the key tooth, and no modification processing is performed; the length L of the middle section of the key tooth without modification processing is calculated according to the formula 2T10 for the bearing capacity of the involute spline. 3 / LΨZHD≤[σp], where T is the transmitted torque; L is the working length of the key; Ψ is the uneven load distribution coefficient; Z is the number of key teeth; H is the working height of the key tooth flank; D is the average diameter; [σp] is the allowable extrusion stress of spline connection.

[0035] Specifically, the tooth direction modification...

Embodiment 2

[0039] The present embodiment discloses an involute spline modification processing method using the involute spline tooth modification design method of Embodiment 1, comprising the following steps:

[0040] S1. Gear rolling is adopted. First, according to the modification designed by the involute external spline, determine the tooth direction modification arc amount a*h of the tooth surface of the two key teeth of the key teeth, the tooth tip modification arc at both ends and the tooth root modification arc;

[0041] S2. Forming and dressing the grinding wheel for grinding the tooth groove of the spline rubbing cutter, including dressing the grinding wheel tooth profile angle and grinding wheel radius R, wherein the dressing grinding wheel tooth profile angle corresponds to the spline tooth profile angle;

[0042] S3. Use the trimmed grinding wheel to grind the rubbing cutter. By adjusting the grinding stroke length L, the straight line length of the middle of the tooth groove...

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Abstract

The invention discloses a method for modifying the shape of an involute spline spline tooth. No modification processing is performed at the contact with the middle section of the key tooth; the length L of the middle section of the key tooth without modification processing is calculated according to the formula 2T10 for the bearing capacity of the involute spline 3 / LΨZHD≤[σp] calculated. This modification method directly improves the contact load distribution of the tooth surface, reduces the eccentric load, and avoids the wear failure caused by the increase of the unit area load; it ensures sufficient axial fit length of the key teeth, thereby ensuring the centering of the spline fit. Precision, greatly improving the quality of gear products. At the same time, a method for modifying the involute spline is disclosed. The processing method has high efficiency, does not generate chips, has high strength, and is simple, reliable and easy to implement.

Description

technical field [0001] The invention relates to the field of gear manufacturing, and more particularly, to an involute spline tooth modification design method and processing method and a gear product thereof. Background technique [0002] The involute spline is an important way for mechanical parts to cooperate and connect. The spline pair relies on the mutual contact of the tooth surfaces of the inner and outer spline teeth for centering, and at the same time bears the transmission torque or pressing force, and has automatic centering and bearing capacity. strong features. [0003] However, due to the tooth direction error and the coaxiality error of the installation during the manufacture of the spline pair, as well as the torsional deformation after being loaded, the load on each spline tooth along the axial direction is uneven, especially the edges and torsion at both ends. The influence of deformation is the greatest, resulting in eccentric load at both ends and poor c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21H5/00
CPCB21H5/00
Inventor 刘波黄桂良张金凤周激波
Owner HANDE AXLE (ZHUZHOU) GEAR CO LTD
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