Bend testing

The test serves as a simple bench test for approximate checking of the chosen welding data. In the test, the weld is subjected to bending in an undefined manner. If arc blow or another visible imperfection is suspected, the stud shall be bent in a manner such that the area to be examined is in the tension zone. This can be done by one of the two following methods.

1. The studs are bent through 60° using drawn arc stud welding with ceramic ferrule or shielding gas, or short-cycle drawn arc stud welding, through 30° using capacitor discharge stud welding with tip ignition or capacitor discharge drawn arc stud welding(see the following figure)
2. The studs are stressed by applying a bending moment below the elastic limit

Note: Values of bending moments for studs by applications > 100 °C are given in following Table

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