Device and method for detecting spot welding quality in real time through ultrasonic penetration signal
A real-time detection and ultrasonic technology, applied in the direction of using sonic/ultrasonic/infrasonic waves to analyze solids, instruments, and analytical materials, etc., can solve problems such as ultrasonic probe positioning errors, and achieve the effects of avoiding positioning errors, improving adaptability and reliability.
Inactive Publication Date: 2017-12-15
WUHAN UNIV OF TECH
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a device and method for real-time detection of spot welding quality by using ultrasonic penetration signals, combining the advantages of online real-time monitoring and post-weld non-destructive testing to solve the problem of positioning errors of ultrasonic probes , and realize the process of online synchronous completion of resistance spot welding and its quality inspection
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[0023] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0024] Such as figure 1 As shown, the present invention uses ultrasonic penetration signals to detect spot welding quality in real time, including ultrasonic probes, ultrasonic detectors 7, computers 8, spot welding machines and spot welding electrodes. The ultrasonic probe is connected with the ultrasonic detector 7 , and the ultrasonic detector 7 is connected with the computer 8 . The spot welding electrodes include an upper electrode 1 and a lower electrode 12 , and the ultrasonic probe includes a transmitting probe 4 and a receiving probe 11 .
[0025] The ultrasonic probe is embedded in the spot welding electrode, and the spot welding electrode is provided with a cavity for containing cooling water 3 . The ultras...
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The invention relates to a device and method for detecting spot welding quality in real time through an ultrasonic penetration signal. The device comprises ultrasonic probes, and an ultrasonic detector and a computer connected to the ultrasonic probes. The device also comprises a spot welding machine and spot welding electrodes. The spot welding electrode is provided with a cooling water hole communicated with a cavity. The ultrasonic probes comprise a transmitting probe and a receiving probe. The spot welding electrodes comprise an upper electrode and a lower electrode. The transmitting probe is inserted in the upper electrode. The receiving probe is inserted in the lower electrode. The method comprises S1, starting the spot welding machine, the ultrasonic detector and the computer and S2, in the process of resistance spot welding on a plate, emitting a series of ultrasonic scanning pulses through the transmitting probe and converting the transmission ultrasonic signal received by the receiving probe into an ultrasonic transmission oscillogram. The device realizes visual, accurate and efficient welding spot quality comprehensive analysis in the spot welding process and realizes the online automatic detection of spot welding quality of a thin plate in the whole process.
Description
technical field [0001] The invention relates to the field of non-destructive testing, and more specifically relates to a device and method for real-time testing of spot welding quality using ultrasonic penetration signals. Background technique [0002] Spot welding is an easy, cost-effective method of joining sheet metal and is suitable for high-speed automated production. The manufacturing quality of the car body directly affects the service life of the whole vehicle. Resistance spot welding is the main welding process for car body manufacturing at present. Therefore, the non-destructive testing technology of solder joint quality is of great significance to ensure the quality of car body assembly and welding. With the rapid development of the automobile industry, the requirements for the quality of resistance spot welding are constantly increasing, and at the same time, the requirements for the accuracy, efficiency, cost, automation and online degree of spot welding quality...
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Login to View More IPC IPC(8): G01N29/04
CPCG01N29/04G01N2291/0234G01N2291/0237G01N2291/2672
Inventor 汪小凯王彬华林向清
Owner WUHAN UNIV OF TECH