Tooth profile modification design method and processing method for involute spline and gear products of involute spline

Abstract

The invention discloses a tooth profile modification design method for an involute spline. The design method comprises the steps that the tooth directions of tooth faces, tooth crests and tooth rootsat the two ends of spline teeth are subjected to arc modification; the tooth faces of the internal and external spline teeth are in contact with the middle sections of the teeth without profile modification; and the length L of the middle sections of the spline teeth which are not modified is calculated according to an involute spline bearing capacity calculation formula 2T103 / LpsiZHD< / =[sigma p].According to the modification method, the tooth face contact load distribution condition is directly improved, the unbalance loading is reduced, and abrasion failure caused by the increase of the unit area load is avoided. Enough axial matching length of the spline teeth is ensured, so that the spline matching and centering precision is ensured, and the quality of gear products is greatly improved. Moreover, the invention discloses a profile modification processing method for the involute spline, the processing method is high in efficiency, no cuttings are generated, the strength is high, andthe method is simple, reliable and easy to implement.

Description

technical field [0001] The invention relates to the field of gear manufacturing, more specifically, to a modification design method and processing method of an involute spline key tooth 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 is centered by the contact between the tooth surfaces of the inner and outer spline teeth, and at the same time bears the transmission torque or final shaft force. It has automatic centering and load-bearing capacity. strong features. [0003] However, due to the tooth orientation error and installation coaxiality error of the spline pair during manufacturing, as well as the torsional deformation after loading, the axial load on each key tooth is uneven, especially the edges and torsion at both ends. Deformation has the greatest impact, resulting in eccentric loading at both ends and poor centering accuracy. [0004] In order to imp...

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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

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