Method and device for detecting tooth matching angle of gear

Abstract

The present invention provides a method and device for detecting the most suitable tooth matching angle of a gear by performing all tooth detection and its signal processing in a short time, thereby canceling the cumulative pitch errors of the left and right tooth surfaces, preventing cutting resides left on the left and right tooth surfaces, and reducing the cutting allowances of the left and right tooth surfaces to irreducible minimum values.According to the left tooth surface (28) which is most considered to leave cutting residue and having a maximum cumulative pitch error AL max (when theclockwise direction is a plus direction) and the right tooth surface(29) having a minimum cumulative error AR min (when the clockwise direction is a plus direction), these cumulative pitch errors arecanceled. A correction value d for reducing the cumulative pitch errors after cutting is determined, a reference tooth groove angle 0 is corrected with the correction value d, and thus the tooth matching angle of a work gear(14) is determined.

Description

technical field [0001] The invention relates to a gear meshing angle detection method and device. Background technique [0002] A gear cut by a gear cutting machine such as a hobbing machine is further finished by a gear finishing machine such as a gear grinder. [0003] In the finishing of this gear, before the actual finishing (grinding) starts, it is necessary to carry out a "meshing" process, so that the teeth (top and bottom) of the grinding tool such as threaded grindstone and the working gear (such as hob cutting, cutting, etc.) The teeth (top and bottom) of the quenched gear) become a meshable rotational phase relationship. [0004] In addition, in this meshing process, it is necessary to obtain the meshing angle of the working gear mounted on the table shaft. As a method for obtaining the meshing angle, the following methods are included in the prior art: using a contact probe as a contact sensor A needle or a proximity sensor as a non-contact sensor detects the p...

AI Technical Summary

Problems solved by technology

[0012] In contrast, in contact sensors such as contact probes, detection takes time, so it is difficult to detect all teeth in a short time and obtain the meshing angle with high precision.

In addition, when using a proximity sensor, it is difficult to meet the above requirements because it takes time to obtain the meshing angle for the following reasons

[0013] (1) Due to the slow response speed of the proximity sensor, the working gear 2 cannot be rotated at high speed

Therefore, the detection of the left and right tooth surfaces 6, 7 is time-consuming

[0014] (2) In the proximity sensor, due to the influence of poor response, only the signal close to one side can be used

Therefore, the detection of the left and right tooth surfaces 6, 7 consumes time

[0015] (3) When an NC device processes external signals from sensors, etc., there is a limitation in the signal interval (input time) in the NC device, so high-speed processing cannot be performed.

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