Spiral bevel gear broaching method and gear broaching machine tool

Abstract

The invention relates to a spiral bevel gear broaching method. The spiral bevel gear broaching method includes the following steps that firstly, a gear to be machined is clamped on an indexing device and kept still, an initial cutter tooth of a gear broaching cutter rotates at the initial speed to enter a machining portion to conduct gear broaching; secondly, subsequent cutter teeth sequentially rotate at a machining speed to enter the machining portion to conduct machining till the final cutter tooth rotates out of the machining portion; thirdly, indexing fan sections of the gear broaching cutter rotate corresponding to the machining portion at an indexing speed, the indexing device drives the gear to be machined to rotate so that indexing can be completed, wherein the rotating speed of the initial cutter tooth of the gear broaching cutter in the machining portion and the rotating speed of the indexing fan sections of the gear broaching cutter in the machining portion are lower than the rotating speed of other cutter teeth in the machining portion; fourthly, executing the first step, the second step and the third step to machine a next gear. The invention further relates to a gear broaching machine tool special for implementing the spiral bevel gear broaching method. The rotating speed of the initial cutter tooth of the gear broaching cutter in the machining portion and the rotating speed of the indexing fan sections of the gear broaching cutter in the machining portion are lower than the rotating speed of other cutter teeth in the machining portion, and therefore machining safety is ensured, and machining efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of gear broaching machine tools, in particular to a gear broaching processing method for a spiral bevel gear and a gear broaching machine tool. Background technique [0002] A gear broaching machine tool for broaching spiral bevel gears generally includes a machine frame on which a workpiece box for clamping the spiral bevel gear to be processed and a cutter head box for clamping the broaching cutterhead are arranged. , the workpiece box is provided with an indexing device for indexing the gear to be processed to realize tooth-by-tooth processing. The cutter head box drives the broaching cutter head to rotate continuously, and the indexing device drives the gear to be processed to rotate intermittently. The disc has an indexing sector without broaching teeth and start and end teeth on both sides of the indexing sector. When the indexing sector of the broaching cutter is located at the processing part of the ...

AI Technical Summary

Problems solved by technology

The broaching cutter head of the existing machine tools rotates at a constant speed under the drive of the driving device during processing. In order to avoid the cutter teeth hitting the gear blank during indexing, and also to avoid the initial cutter teeth entering the processing part due to the large machining allowance When the cutting impact is too large, the speed of the broaching cutter head must be very slow, thereby reducing the processing efficiency of the machine tool

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