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Apparatus and method for quality inspection of welded parts

A quality detection method and detection device technology, which are applied in the analysis of materials, the use of sonic/ultrasonic/infrasonic waves to analyze solids, instruments, etc., can solve the problems of high-speed train damage, low detection efficiency, and electromagnetic radiation harming health, etc., and achieve rapid quality detection. Effect

Active Publication Date: 2022-03-29
CRRC QINGDAO SIFANG CO LTD
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Problems solved by technology

Traditional non-destructive testing technology is difficult to meet the needs of production testing, such as X-ray testing equipment is expensive, electromagnetic radiation is harmful to health, while ultrasonic testing has strict requirements on the working surface and low testing efficiency
Moreover, high-speed trains are seriously damaged during service due to high-speed operation. Therefore, it is very important to detect the safety of key aluminum alloy profile welded components of high-speed trains during service. However, the current non-destructive testing methods are not suitable for high-speed trains during service. In-situ safety inspection of key aluminum alloy welded components of trains

Method used

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  • Apparatus and method for quality inspection of welded parts

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Comparison scheme
Effect test

Embodiment 1

[0030] A weldment quality inspection device mainly includes an excitation device, a measurement device and a control device. The detection device excites the shock wave vibration on the aluminum alloy welded parts through the excitation device, detects the vibration response signal, and judges the tissue structure information of the vibration excitation point area and the area between the vibration excitation point and the measurement point according to the vibration response signal, so as to weld the aluminum alloy parts for quality testing.

[0031] Such as figure 1 As shown, an excitation point is set at a distance of 3-8 mm from the edge of the heat-affected zone of the weld on one side of the weld of the weldment, and on the same horizontal plane as the excitation point, the comparison measurement is set symmetrically with the weld of the weld as the axis of symmetry Point R, damage measurement point M, control measurement point R, damage measurement point M are 20mm-100...

Embodiment 2

[0052] The difference between this embodiment and Embodiment 1 is that the method for detecting the quality of welded parts described in this embodiment is mainly used for the quality detection of welded parts during service, including the following steps:

[0053] Step 1. After the high-speed train is produced and before it is put into use, for the aluminum alloy weldment installed on the high-speed train, an excitation signal is input at each excitation point g through the excitation device to obtain the frequency spectrum signal of each knocking force;

[0054] According to the calculation method of the time domain duration ratio, the frequency ratio of each order mode, and the frequency ratio of the center of gravity of the power spectrum, the ratio of the control measurement point R and the damage measurement point M corresponding to each excitation point g of the aluminum alloy weldment to be tested is obtained The duration ratio of the vibration response signal k″ t(g) ...

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Abstract

The invention relates to a weldment quality inspection device and method, including an excitation device for performing multiple percussion excitations on the weldment, and obtaining frequency spectrum signals of each percussion force; a measuring device for collecting each percussion The vibration response signal of the damage measurement point M of the percussion excitation; the control device is connected with the excitation device and the measurement device circuit, and is used to calculate the time domain duration, each The order modal frequency and the center frequency of the power spectrum. The invention adopts the shock wave vibration detection method to detect the welded parts of aluminum alloy profiles, which can not only realize the rapid quality detection of the welded parts of aluminum alloys before they are put into use, but also can detect the aluminum alloy profiles without disassembly during regular safety inspections during service In-situ safety testing of alloy weldments.

Description

technical field [0001] The invention relates to a quality inspection device and method, in particular to a weldment quality inspection device and method. Background technique [0002] With the rapid development of high-speed railways in my country, the speed of high-speed trains continues to increase, and the requirements for the production quality of high-speed trains also increase accordingly. The quality of car body components is the key to ensuring the production quality of high-speed trains. With the development of lightweight high-speed trains, aluminum alloy profile structural parts, especially the components of 6 series aluminum alloy profiles, have been widely used in high-speed trains. In the manufacturing process of aluminum alloy car body structural parts, the welding process is the main connection process method. There are stress concentration and unevenness in the welded joint area, which is always a weak link in the lightweight car body structure. The safety i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04
CPCG01N29/04G01N2291/0234G01N2291/2675
Inventor 曹春鹏张海军马君但龙杨钊
Owner CRRC QINGDAO SIFANG CO LTD
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