| Impact bending Test | |
| The impact bending test is one
of the most common test methods to check welding parameters and to
identify defective welds. If a weld joint is thought to be defective or
the fusion length of the stud is too short, the impact bending test must
be carried out as follows: Bend the welding element by 60° with a hammer
or bending device. This stresses the weld joint in tension, pressure and
bending by an undefined amount. • The impact bending test is deemed as passed if there are no cracks to be seen in the welding zone. • If the welding element is torn out of the base metal (a recess is formed in the workpiece), the weldability of the materials is deemed proven. • If the welding element breaks off in the welding zone, you must check whether: - both materials are weldable, - the material combinations are weldable, - the ignition tip is in order, - the settings on the welding gun and power unit are correct and - the welding gun or power unit is defective. If these requirements are not met, an impact bending test must also be carried out on the three previous and three next welds. Warning: Welding work may only be continued when satisfactory test results are obtained. 60° |
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