Device for detecting pitch error of acrylonitrile butadiene styrene (ABS) gear ring by magnetic induction

Abstract

The invention discloses a device for detecting a pitch error of an acrylonitrile butadiene styrene (ABS) gear ring by magnetic induction. The device is characterized by comprising a rotating mechanism, a switch mode magnetic induction sensor positioned on one side of the rotating mechanism, a data acquisition and storage device and a signal analysis device. In the device for detecting the pitch error of the ABS gear ring by the magnetic induction, a non-contact test is adopted, so the surface of the ABS gear ring to be tested cannot be damaged; a test flow is performed automatically, so an additional error caused by different selections on test points and subjective factors during manual measurement is avoided; and evaluation of the pitch error of the gear ring and outoftolerance tooth positioning are performed at the same time, so analysis basis is supplied to an ABS gear ring manufacturer for improving a corresponding production method and a corresponding process under the conditionthat products are unqualified or the quality of the products is unstable.

Description

technical field [0001] The invention relates to a device 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

Images