Tweco 181i Fabricator - Manual (Page 75)

Fabricator 181i
Manual 0-5191 4-17 BASIC WELDING GUIDE
Art # A-07707
Figure 4-31: Principle of Presetting
Art # A-07708
B
Preheat Preheat
Dotted lines show effect if no preheat is used
Weld
C
Figure 4-32: Reduction of Distortion by Preheating
Art # A-07709
Figure 4-33: Examples of Distortion
Art # A-07710_AB
1
Block Sequence.
The spaces between the welds are
filled in when the welds are cool.
2
3
Figure 4-34: Welding Sequence
Art # A-07711_AB
4
3
2
1
Figure 4-35: Step back Sequence
Art # A-07428_AB
Figure 4-36: Chain Intermittent Welding
Art # A-07713_AB
Figure 4-37: Staggered Intermittent Welding