Five-axis grinding wheel grinding processing method for planar enveloping hourglass worm

Abstract

A five-axis grinding wheel grinding processing method for a planar enveloping hourglass worm adopts a five-axis numerical control machine tool, the grinding plane of a grinding wheel coincides with the tooth surface of a virtual gear and the grinding wheel rotates around the rotating axis of the virtual gear through five-axis linkage of the machine tool according to a forming principle of the planar enveloping hourglass worm, a worm workpiece rotates around own axis simultaneously, the rotating speeds and directions of the grinding wheel and the worm workpiece are determined according to the rotating direction and the transmission ratio of a worm gear pair, the distance between the axis of the virtual gear and the axis of the worm workpiece is equal to the center to center distance of the worm gear pair, so that the tooth surface of the planar enveloping hourglass worm is ground through planar enveloping of the grinding wheel. The five-axis process technology is applied to grinding processing of the planar enveloping hourglass worm for the first time, and the grinding range and the grinding precision of the planar enveloping hourglass worm can be increased remarkably by using the flexibility and precision of the five-axis processing machine tool.

Description

technical field [0001] The invention relates to the field of worm grinding, in particular to a grinding method for a five-axis linkage grinding wheel of a plane enveloping torus worm. Background technique [0002] The planar enveloping toroidal worm pair is a new type of worm drive, such as figure 1 As shown, its formation principle is: a plane gear is used as a shape wheel to rotate around its axis, and at the same time, the toroidal worm blank is rotated around another axis according to the specified transmission ratio. The envelope surface generated by the gear plane is Plane-enveloping toroidal worm tooth surfaces. [0003] Compared with the ordinary cylindrical worm drive, the planar enveloping toroidal worm pair has the advantages of large number of contact teeth during transmission, large load capacity, large lubrication angle, good lubrication performance and high transmission efficiency. Therefore, it is widely welcomed in various industries such as shipbuilding, ...

AI Technical Summary

Problems solved by technology

[0004] However, the plane enveloping toroidal worm tooth surface is a complex curved surface that is constantly moving and changing in space. From the meshing end to the meshing end, the tooth shape is different, and the tooth thickness is constantly changing, and its pitch circle The surface is a concave torus, which makes it difficult to design and process

[0005] The grinding and finishing of the traditional planar double-enveloping toroidal worm is usually processed on a modified ordinary lathe. A rotary table is added to the lathe, and the special grinding head is adjusted on it according to the special grinding head for the toroidal worm. Helical gear inclination and center distance, through the two-axis linkage of the rotary table and the lathe spindle, the Fan Cheng method grinding of the plane enveloping toroidal worm is realized. This traditional method has a limited center distance adjustment range, which leads to a limited processing range and cumbersome adjustment of the special grinding head. Moreover, the accuracy is difficult to guarantee, and the rigidity of ordinary modified lathes is poor, etc.

Images