Fast K value and leading-edge testing method of ultrasonic small-angle probe

Abstract

The invention discloses a fast K value and leading-edge testing method of an ultrasonic small-angle probe. The fast K value and leading-edge testing method is characterized by comprising the following steps that the longitudinal-wave small-angle probe is put on the side face of a TZS-R test block and is moved to found out the highest reflection echo of a manually notched groove, the distance from the front end of the probe to the upper end face of the test block is L1 at the moment, a formula (L1 + L0) / 175 = tan beta = K (1) is obtained, the longitudinal-wave small-angle probe is downward moved, the highest reflection echo of a corner angle at the horizontal scale of 200 mm is found, the distance from the front end of the probe to the upper end face of the test block is L2 at the moment, a formula (L2 + L0) / 200 = tan beta = K (2) is obtained, the formula (1) and the formula (2) are continuously arranged to obtain (L1 + L0) / 175 = (L2 + L0) / 200, and a leading edge L0 = 7L2-8L1 is obtained; L0 = 7L2-8L1 is substituted into the formula (1) to calculate K = (L2-L1) / 25, and beta = tan-1(L2-L1) / 25. The testing time is saved, and the testing efficiency is improved.

Description

technical field [0001] The invention relates to a testing method, in particular to a fast testing method for the K value of an ultrasonic small-angle probe and the leading edge. Background technique [0002] Regular ultrasonic flaw detection of railway vehicle axles is an important means to ensure traffic safety, and the longitudinal wave small-angle probe is one of the main probes for flaw detection of the root of the axle journal. The accuracy of its two important parameters K value and front directly determines the location and quantification of defects. [0003] At present, the measurement of the K value and the front edge of the 6-8° longitudinal wave small-angle probe is mainly based on the two standards of "Railway Freight Wheel Axle Assembly, Maintenance and Management Rules" and "Railway Passenger Wheel Axle Assembly, Maintenance and Management Rules". The distance from the probe to the corner X 1 , The distance from the probe to the corner X when the secondary ec...

AI Technical Summary

Problems solved by technology

[0006] This kind of test has many steps and measurement data, and the accuracy of the first frontier result affects the accuracy of the second K value, resulting in a secondary error

The prior art has the following disadvantages: 1. The operation of the existing test method needs 3 steps, and there are many steps. It is necessary to measure two data and then calculate the leading edge, and then measure a data to calculate the K value

2. The data measurement depends on the proficiency of the operator, and there are human errors. The more measurement data, the greater the error; the consistency of the test results is poor; 3. When measuring with the existing test method, the position of the probe is not on the same side of the test block, which makes the operation troublesome and the detection efficiency is low. Low

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