A single-side broaching gear broach with the same profile

Abstract

The invention discloses a single-side broaching gear broach with the same profile, which includes a front section and a rear section, the front section is a rough broach tooth section with a gradual forming structure, and the rear section is a fine broach tooth section with a contour forming structure. The rear cutter teeth are broached with unilateral tooth lift. The first tooth of the rear section is symmetrical to the center of the front section, and the tooth width of the two is the same, and the back angle of the first tooth of the rear section is negative. A number of transition teeth are designed in the middle of the rear section, and both sides of the transition teeth have no tooth rise and relief angle. The last 3~5 teeth in the rear section are the calibration teeth, and the teeth between the first cutter tooth and the transition teeth, and between the transition teeth and the calibration teeth are the main cutting teeth in the rear section. The present invention can effectively solve the problem of poor chip removal that is likely to occur when the involute tooth shape with small modulus or the actual tooth width is narrow, improves the processing technology of the broach and fully maintains the consistency of the left and right total tooth rises, and at the same time for the helical tooth The broaching of shaped parts will not cause strain and rotten teeth due to the inconsistent sharpness of the two sides of the cutter teeth.

Description

technical field [0001] The invention relates to a single-side broaching gear broach with the same profile, in particular to a gear broach in which the side blade is the main cutting edge of the finishing broach teeth, and the left and right sides of the broaching teeth are respectively broached. Background technique [0002] Internal gear broaching is an extremely common cutting process in machining. At present, the general broach is designed as a gradual forming structure with the same width of all teeth, such as figure 1 As shown, the tooth shape of the part is formed step by step by the increase of the outer ring tooth of the broach, that is, the tooth shape is formed by cutting the secondary cutting edge on the side of the tooth, and the roughness is average. In addition, the broaching process determines the distance between the part and the broach. There is an inevitable relative circumferential displacement between them, and the tooth shape of the parts is also affect...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to propose a single-side broaching gear broach with the same profile, which can effectively solve the problem of poor chip removal that is likely to occur when the small modulus involute tooth profile or the actual tooth width is narrow, and improve the The processing technology of the broach is high and the consistency of the left and right total tooth rise is fully maintained. At the same time, the broaching of the helical tooth-shaped parts will not cause strain or rotten teeth due to the inconsistent sharpness of the two sides of the tooth

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