Miller Bobcat 250 Diesel, Руководство пользователя

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OM-258413 Page 60
S-0061
Slow
Normal Fast
10
°
-
30
°
Drag
Too Short
Normal Too Long
Spatter
Angle Too Small
Angle Too Large
Correct Angle
Electrode Angle
Arc Length
Travel Speed
.
Weld bead shape is affected
by electrode angle, arc length,
travel speed, and thickness of
base metal.
12-7. Conditions That Affect Weld Bead Shape
S-0054-A
.
Normally, a single stringer
bead is satisfactory for most
narrow groove weld joints;
however, for wide groove weld
joints or bridging across gaps,
a weave bead or multiple
stringer beads work better.
1 Stringer Bead − Steady
Movement Along Seam
2 Weave Bead − Side to Side
Movement Along Seam
3 Weave Patterns
Use weave patterns to cover a
wide area in one pass of the elec-
trode. Do not let weave width ex-
ceed 2-1/2 times diameter of
electrode.
1
2
3
12-8. Electrode Movement During Welding
12-9. Welding Lap Joints
S-0063 / S-0064
1 Electrode
2 Single-Layer Fillet Weld
Move electrode in circular motion.
3 Multi-Layer Fillet Weld
Weld a second layer when a heavi-
er fillet is needed. Remove slag be-
fore making another weld pass.
Weld both sides of joint for maxi-
mum strength.
30
°
Or Less
30
°
Or Less
1 1
2 3