Method for detecting pitch error of ABS gear ring by magnetic induction

Abstract

The invention discloses a method for detecting a pitch error of an ABS gear ring by magnetic induction. The method is characterized in that the method comprises a detection step, a signal collection step and an error calculation step. Besides, an apparatus for detecting a pitch error of an ABS gear ring by magnetic induction is utilized in the invention and a non-contact test is employed; therefore, no surface damage on a to-be-detected ABS gear ring will be caused. According to the invention, a test process is carried out automatically; an additional error caused by unstable selection of test points and a subjective factor can be avoided, wherein the additional error exists during manual measurement; and when a pitch error of a gear ring is evaluated, out-of-tolerance gear localization can be carried out simultaneously, so that an analytic base of improvement of a corresponded production method and a flow is provided for ABS gear ring manufacturers on the condition that product qualities have problems and are unstable.

Description

technical field [0001] The invention relates to a method for detecting the pitch error of an ABS ring gear by magnetic induction. Background technique [0002] The ABS ring gear is a gear structure made of magnetically permeable materials. The tooth pitch is 5±1mm, the number of teeth is generally in the range of 20 to 80, the ratio of tooth height arc length to pitch is between 30% and 70%, and the pressure angle Between 0° and 20°, the chamfering radius of the tooth top and tooth bottom shall not exceed 0.2mm, the minimum is 0.05mm; the tooth height is greater than 2mm, generally the highest is 5mm; the tooth thickness is greater than 5mm, generally the thickest is 10mm. [0003] The pitch single-tooth error and cumulative error of the ABS ring gear are one of the important indicators for evaluating the quality of the ABS ring gear. The error value directly determines the accuracy of the signal generated by the wheel speed sensor, and then directly affects the ABS performa...

AI Technical Summary

Problems solved by technology

When this method is applied to the detection of the ring gear, because the teeth are very dense and the size is small, the probe selects different predetermined positions on the tooth surface, and the measurement results are quite different. It is difficult to determine whether the pitch error of the ABS ring gear to be tested is Within 4% requirement

[0009] To sum up, at present, in the field of pitch error measurement of ABS ring gear, the use of mechanical or photoelectric gear measurement methods cannot meet the accuracy requirements, and the deviation of the test results is too large to be convincing.

The measurement method using the magnetic sensor cannot locate the out-of-tolerance tooth, and there is no error-proof processing for the single-tooth error test result

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