Resistance spot welding quality evaluation device

A resistance spot welding and quality technology, applied in resistance welding equipment, welding monitoring devices, welding power sources, etc., can solve the problems of poor real-time detection method, high cost, large system volume, etc., and achieve easy portability and installation, low cost, and volume. small effect

Inactive Publication Date: 2015-12-16
NORTHEASTERN UNIV +1
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AI Technical Summary

Problems solved by technology

Due to many influencing factors, stable process parameters cannot guarantee the quality of solder joints for a long time
The detection method of post-weld inspection has poor real-time performance, and cannot detect solder joint defects in time and realize online monitoring of welding quality. The widespread use of the resistance spot welding method is very meaningful
[0003] The existing spot welding quality inspection system mainly has two configurations: 1. Sensor-data acquisition card-PC (host computer); 2. Sensor-single-chip microcomputer-PC. High, poor portability, inconvenient installation and debugging

Method used

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Embodiment Construction

[0036] In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] Such as figure 1 As shown, the embodiment of the present invention provides a resistance spot welding quality evaluation device, including

[0038] The current sensor is used to detect the welding current signal in the welding process;

[0039] The electrode pressure sensor is used to detect the electrode pressure signal during the welding process;

[0040] The electrode displacement sensor is used to detect the electrode displacement signal in the welding process;

[0041] The voltage sensor is used to detect the voltage signal between the electrodes during the welding process;

[0042] The sensor peripheral circuit module is used to...

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Abstract

The invention discloses a resistance spot welding quality evaluation device. A welding parameter detection and welding point quality evaluation system with an STM 32 single chip microcomputer as a development platform is adopted, an embedded development technology is adopted, problems of signal isolation and the like are considered, the welding current, electrode pressure, voltage among electrodes and electrode displacement signals in the work process of a spot welding machine are collected, data are processed, then the characteristic quantity of a signal time domain is extracted, the data are input to an expert system, and on-line evaluation is conducted on the welding point quality through inference of the expert system.

Description

technical field [0001] The invention relates to the field of resistance spot welding quality evaluation, in particular to a resistance spot welding quality evaluation device. Background technique [0002] So far, the research on spot welding quality inspection and monitoring technology has been done for decades, and dozens of methods have been proposed. The information cannot be directly and quickly measured, but can only be inferred indirectly through the relevant signals of the welding process. So far, there is still a lack of effective and universally practical methods. In actual production, spot welding quality is guaranteed by stabilizing process parameters during welding and sampling damage inspection after welding. Due to many influencing factors, stable process parameters cannot guarantee the quality of solder joints for a long time. The detection method of post-weld inspection has poor real-time performance, and cannot detect solder joint defects in time and reali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/25
CPCB23K11/252B23K11/255B23K11/257B23K11/258
Inventor 孙红春张大龙朱东升王双杨建辉
Owner NORTHEASTERN UNIV
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