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Ultrasonic flaw detection method for truck wheel axles and dedicated flaw detector

An ultrasonic and axle technology, which is applied in the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, material analysis using sound waves/ultrasonic waves/infrasonic waves, instruments, etc., can solve problems such as loss, and achieve complete flaw detection and good results.

Inactive Publication Date: 2012-05-23
NANTONG UNION DIGITAL TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the analysis of multiple vehicle axle cutting accidents, missed detection in flaw detection work is the main factor leading to losses

Method used

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  • Ultrasonic flaw detection method for truck wheel axles and dedicated flaw detector
  • Ultrasonic flaw detection method for truck wheel axles and dedicated flaw detector
  • Ultrasonic flaw detection method for truck wheel axles and dedicated flaw detector

Examples

Experimental program
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Effect test

experiment example

[0027] Physical axle test block:

[0028] Prepare one physical shaft for RD2 and RE2B, one artificial defect with wire cutting depth of 1mm and 0.5mm respectively at the root of the journal at both ends of the RD2 shaft at 200mm, 210mm, and 215mm from the shaft end, and one at the two ends of the RE2B shaft The root of the neck is 180mm, 200mm, and 205mm away from the shaft end, respectively, with a wire cutting depth of 1mm and 0.5mm for each artificial defect, and then a bearing is installed on one of the ends as a comparison artificial experimental shaft.

[0029] Scan mechanical system

[0030] A) Shaft end scanning system

[0031] Straight probe, 23.3-degree small-angle longitudinal wave probe (RD2), 27.3-degree small-angle longitudinal wave probe (RE2B) combined multi-probe scanning system is suitable for quick selection of different axial types. Encoder coding, as the basis for accurate positioning and comparison of B-scan. And through the adsorption of the magnetic ...

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Abstract

The invention discloses an ultrasonic flaw detection method for truck wheel axles and a dedicated flaw detector. The method comprises the following steps: using an axle head normal probe and a plurality of 4-5MHz small-angle longitudinal wave probe combined scanning system to detect holoaxial penetration and part of axle neck root; using a 45-degree probe to start scanning for a circle from the axle body the covering non-detection zone of the axle neck root when scanning; using a 45-degree probe to start scanning the axle body sawtooth pattern and then the inside of the wheel seat inlaid part; using a 54.5-degree probe to start scanning the axle body sawtooth pattern and then the wheel seat inlaid part. An ultrasonic wave signal pretreatment channel of the flaw detector is connected with a controllable gain amplifier which is connected with a demodulation bumper, the demodulation bumper is connected with an A / D conversion module, the A / D conversion module is connected with a digital signal processor; a CPU is connected with the controllable gain amplifier, the demodulation bumper, the A / D conversion module, the digital signal processor, a random access storage memory, a program storage unit and a communication interface. The invention features complete flaw detection and good flaw detection effect.

Description

Technical field: [0001] The invention relates to a special flaw detector for an ultrasonic flaw detection method of a truck axle. Background technique: [0002] Railway transportation is an important part of the national economy, and the safety of railway transportation is very important. At present, in the domestic railway vehicle maintenance department, the ultrasonic flaw detection of truck axles mainly uses a microcomputer-controlled ultrasonic flaw detector and a portable multi-channel A-type display ultrasonic flaw detector for automatic preliminary detection and manual re-detection respectively. Through the analysis of multiple vehicle axle-cutting accidents, missed detection in flaw detection work is the main factor leading to losses. [0003] Therefore, we urgently need to develop new and effective flaw detection and management methods to prevent accidents from happening. Invention content: [0004] The object of the present invention is to provide an ultrasonic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N29/24
Inventor 郭振祥
Owner NANTONG UNION DIGITAL TECH DEV
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