Checking The Quality Of The Weld; Visual Inspection - HBS ONURFIX A 22 Operating Manual

5.7

Checking the Quality of the Weld

You can check the quality of the weld by means of a visual inspection and a bending
test.
5.7.1

Visual Inspection

A visual inspection must be carried out with each welding element.
Shape, size, evenness, and color of the weld collar are assessed during a visual
inspection. The length of a welded element should be 2 - 3 mm shorter than before
welding.
Condition
Weld collar evenly, shiny, and complete
Length of w elding element w ithin tolerance
after w elding
Contraction of w eld collar
w elding element too long
Weakly developed, uneven w eld collar w ith
mat surface
Welding element too long
Single-sided w eld collar
Undercut
Weld collar low , shiny surface w ith many
spatters
Welding element too short
32
See also actual standards in the appendix "Arc stud welding of
metallic materials", in section irregularities and corrective
actions.
Possible cause
- Correct parameters
- Plunging depth or lif t too low
- Welding energy too high
- Ceramic ring not centered correctly
- Welding energy too low
- Ceramic ring is humid
- Arc blow effect
- Ceramic ring not centered correctly
- Welding energy too high
- Plunging speed too high
Visual Inspection
Corrective actions
- None
- Increase plunging depth, check lift and
centering of the ceramic ring
- Decrease current and/or time
- Check centering
- Increase current and/or time
- Rebake ceramic rings in a furnace
- See arc blow effect
- Check centering
- Decrease current and/or time
- Adjust plunging depth and/or damping factor
A 22 Order No. BA 93-20-290 Issue 01.03.08