N1500i FACS Manual
38
Part No. 729-110-053 V.1.03 © 2018 Nelson Stud Welding, Inc. All rights reserved.
3.7.2 Drawn Arc Process - Visual Inspection
Inspection and testing of the weld is restricted in these operating and
service instructions to the visual inspection of welds. A description of
the mechanical and technological tests would go beyond the scope of
these operating and service instructions.
+
See EN ISO 14555
1
for detailed information in this regard.
1.
Perfect weld
•
Weld flash is even, glossy and closed. Stud length after welding
within tolerance. Corrective measures: Not necessary. No
alteration to the electrical and mechanical parameters.
2.
Faulty weld
•
Constriction of the weld, stud too long. Corrective measures:
Increase plunge distance, check lift, check centering of the
ceramic ferrule. Decrease weld current and/or weld time.
3.
Faulty weld
•
Weakly formed, uneven weld flash with a dull surface. Stud too
long. Corrective measures: Increase weld time and weld current.
Possibly dry ceramic ferrules in oven.
4.
Faulty weld
•
Weld flash single-sided, undercutting. Corrective measures:
Eliminate blowing effect by applying corrective measures
described in Section 1.3. Check centering.
5.
Faulty weld
•
Weld flash low, surface glossy with intense spattering. Stud too
short. Corrective measures: Decrease weld time and weld cur-
rent, adjust plunge distance and/or damping.
1. EN ISO 14555: „Welding Arc stud welding of metallic materials“ (2006)
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