Soyer BMS-10N, Operating Instructions Manual, Page: 40 / 69

7-30
Quality control
R
If the quantity of defective studs in one random test exceeds the acceptance
number specified in DIN 267, part 5, as per AQL 4, it is necessary to find out
the reason for the faults. The setting values must be modified and the test
repeated.
7.5.4 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 to an angle of 30
°
by
means of a tube that is slipped over the stud. The test is considered as suc-
cessful, if no superficial fissure or fracture is detected in the welding zone. The
acceptance number in accordance with DIN 267, part 5, as per AQL 4 must be
complied with. If the quantity of defective parts in one inspection lot exceeds
the acceptance number AQL 4 (see DIN 267), the cause of trouble must be
determined and the test repeated again.