Bend Test; Tensile Test - Soyer BMH-22i Operating Instructions Manual

7.3.3

Bend test

The bend test is a simple work test which serves to roughly check the setting values selected. The
welding zone is subjected to undefined tension, pressure and bending. A minimum of 3 studs is
welded and bent by means of a tube that is slipped over the stud. The test is successful when no
superficial fissure or fracture is detected in the welding zone.

In drawn arc and short-cycle drawn arc operation with ceramic ferrule or shielding gas, the
stud should be bent 60° from its axis.
Bend test with tube placed upon the stud
7.3.4

Tensile test

The tensile test serves to test the metallic bond of the stud with the base metal. At least 3 studs are
welded and then axially loaded by means of an appropriate tension device until they break. If the
customer demands that a certain percentage of the welded studs should be tested with a specific test
load in production, a tension device with load indicator should be used.
If the stud breaks outside the welding zone, the test is regarded as successful.
If it breaks within the welding zone, an examination of the fractured surface helps to find out the
appropriate changes of the welding conditions. The setting values must be modified and the test
repeated.
Note
Numerous special accessories are optionally available for perfectly testing stud welded joints:
BP-1 SOYER Bend Testing Device for non-destructive stud testing to support quality assurance procedures
DMS-1 SOYER Torque Wrench for non-destructive stud testing to support quality assurance procedures
For further information, please contact our parent company or the customer service responsible for
your area or visit our website at www.soyer.de.
46
Bend test with hammer
BMH-22i