Split type involute helix inner gear broach and grinding method of cutting edge thereof

Abstract

The invention discloses a split type involute helix inner gear broach and a grinding method of a cutting edge thereof, and relates to the technical field of helix inner gear broaches. The broach structurally comprises a broach body, the two ends of the broach body are connected with a front handle and a rear handle correspondingly, and a front pressing device, a blade, a rear guide sleeve and a rear pressing device are sequentially arranged on the broach body, wherein the blade comprises guide teeth, cutting teeth, fine cutting teeth and calibration teeth, the cutting teeth are a generating cutter combination structure, and the fine cutting teeth can perform tooth side finish broaching and tooth top finish broaching. According to the split type involute helix inner gear broach and the cutting edge grinding method designed of the split type involute helix inner gear broach, the service life of the broach is prolonged, and the broach quality is improved.

Description

technical field [0001] The invention relates to the technical field of a helical internal gear broach, in particular to a subpackage type involute helical internal gear broach and a sharpening method thereof. Background technique [0002] The method of broaching the straight tooth inner ring gear includes gear shaping, broaching, etc., because of the high processing efficiency of broaching, and compared with slotting and hobbing, the tooth surface roughness of broaching is better. The machining accuracy can reach DIN7 level, but the broach manufacturing cost is relatively high, and broaching is generally used for products with large quantities and precision requirements. For the gear shaping of the helical inner ring gear, it is necessary to install a spiral guide rail. The product accuracy is greatly affected by the accuracy of the equipment and the accuracy of the tool, and the roughness of the tooth surface is low. As one of the broaching methods, spiral broaching has be...

AI Technical Summary

Problems solved by technology

As one of the broaching methods, spiral broaching has been widely used in automotive gear manufacturing, round hole broaching and deep broaching in recent years because of its high tool strength, good cooling and lubrication, good tooth surface roughness, and high broaching precision. In hole broaching, but most of the broaches that can be produced in my country are straight broaches, and there are few companies that can produce spiral broaches. Ring, large-scale construction machinery internal gear, etc.) Large-scale spiral broaches have not yet been manufactured by Chinese companies, mainly because spiral broaches are difficult to manufacture and process, and it is difficult to achieve high processing accuracy, and the sharpened broach needs to be based on trial cutting results. Form grinding is carried out, but the broach factory does not have a spiral broaching machine, so the quality of the processed spiral broach is quite different from that of imported broaches. In fact, the broach is only "similar in shape", and various problems will occur during processing , and the service life is several times shorter than that of foreign broaches

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