Non-destructive testing using ultrasound: Cost-effective quality assurance for truck windscreen bonding

Extensive studies have shown that the ultrasound procedure that has been used for many years to detect gas leaks can also be used to test for leaks in bonded windscreens. If the test is used correctly, it offers the same level of accuracy as the water test. However, because both procedures are generally carried out manually, it is always possible for the results to be misinterpreted. A decisive factor in the use of ultrasound measurement is a comprehensive, advance investigation of the test points on the vehicle. Bonds that are difficult to access or concealed cannot be tested reliably. This also applies to adhesive bonding defects. Provided that extensive trials of the test points in the vehicle are carried out in advance to ensure the reliability of the procedure, the results of the ultrasound test are comparable with those of the much more time-consuming water test in the leak test chamber. The studies were carried out as part of the PETER (process technology to determine the technological properties of lightweight vehicle structures after repairs) research project sponsored by the German Federal Ministry of Education and Research.