Author: Bob Morrison

Traditional destructive testing of Spot Welds, such as those detailed in ISO 10447 https://www.iso.org/standard/61276.html  are common in automobile manufacturing, and include peel and chisel tests for routine quality.  However, the amount of time, effort, and scrap associated with destructive testing makes non-destructive test (NDT) methods attractive. Ultrasonic testing of spot welds in automotive applications is becoming more common and has been proven to be a good indicator of the quality of spot welds.  A well-designed ultrasonic inspection system intended for testing spot welds will look at the multiple reflections of the ultrasonic signals that travel through the spot weld and…

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With a good ultrasonic Non-Destructive Test (NDT) inspection system that determines the thickness and diameter of a spot weld, the results have been shown to be more accurate than a destruction test while the tests are much quicker, easier, less wasteful and more safe. A 3-D Matrix Phased Array ultrasonic technology test system with a trained operator can finish the inspection of a set of spot welds in a fraction of the time without having to destroy a part and allow the results to affect changes to the weld systems to reduce production of bad welds. Destructive testing of spot welds…

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