A measuring tool and measuring method for wear amount of involute inner spline

Abstract

The invention relates to a measuring tool, in particular to an involute internal spline abrasion loss measuring tool and a measuring method thereof, and aims to solve the problem of low internal spline abrasion loss measuring precision in the prior art. The involute internal spline abrasion measuring tool comprises a modified inside micrometer and a standard part. The modified inside micrometer comprises three measuring heads. The working ends of the measuring heads are ball heads, and the ball centers of the ball heads of the three measuring heads are located on the same circumference. The invention further provides an involute internal spline abrasion loss measuring method. The method comprises the following steps: (1) using a standard part for zero setting to modify the inside micrometer; 2) inserting the refitted inside micrometer into a tooth socket of the measured involute internal spline, wherein the reading of the refitted inside micrometer is [delta]M; and 3) calculating to obtain an [delta]S value according to the corresponding relationship between the [delta]S value and the [delta]M value, and obtaining the wear condition of the measured involute internal spline when theresidual tooth thickness of the measured involute internal spline is equal to the difference of the tooth thickness of the standard part and the [delta]S value.

Description

technical field [0001] The invention relates to a measuring tool, in particular to a measuring tool and a measuring method for the wear amount of an involute inner spline. Background technique [0002] There are many measurement methods in the manufacture of involute internal splines, such as the three-needle method to measure the M value, the limit plug gauge to measure whether the tolerance zone of the internal spline is qualified, etc. For some internal splines with high performance requirements, it is necessary to regularly check the working position. Wear amount, because the connected external spline is often in the middle of the internal spline, so it is difficult to measure the actual wear part of the internal spline. [0003] Existing measuring tools adopt a lever structure for measurement, but due to different strengths of users, the measurement results are also different. Especially for the engine whose internal spline is 250mm from the orifice, due to the narrow ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a measuring tool for the wear amount of the involute inner spline to solve the problem of low measurement accuracy of the wear amount of the inner spline in the prior art

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