Tweco ArcMaster 401S Manuel d'utilisateur télécharger pdf (Page 52)

ARCMASTER 401S POWER SOURCE

Base Metal

Thickness

DC Current

for Mild

Steel

DC Current

for Stainless

Steel

Tungsten

Electrode

Diameter

Filler Rod

Diameter (if

required)

Argon Gas

Flow Rate

CFH

Joint Type

0.040”

1.0mm

35-45

40-50

20-30

25-35

0.040”

1.0mm

1/16”

1.6mm

11-15 Butt/Corner

Lap/Fillet

0.045”

1.2mm

45-55

50-60

30-45

35-50

0.040”

1.0mm

1/16”

1.6mm

11-15 Butt/Corner

Lap/Fillet

1/16”

1.6mm

60-70

70-90

40-60

50-70

1/16”

1.6mm

1/16”

1.6mm

15 Butt/Corner

Lap/Fillet

1/8”

3.2mm

80-100

90-115

65-85

90-110

1/16”

1.6mm

3/32”

2.4mm

15 Butt/Corner

Lap/Fillet

3/16”

4.8mm

115-135

140-165

100-125

125-150

3/32”

2.4mm

1/8”

3.2mm

21 Butt/Corner

Lap/Fillet

1/4”

6.4mm

160-175

170-200

135-160

160-180

1/8”

3.2mm

5/32”

4.0mm

21 Butt/Corner

Lap/Fillet

Table 4-6: Welding Rate

TIG Welding is generally regarded as a specialized process that requires operator competency. While many of the

principles outlined in the previous Arc Welding section are applicable a comprehensive outline of the TIG Welding

process is outside the scope of this Operating Manual. For further information please refer to www.tweco.com

or contact Tweco.

4.04 TIG (GTAW) Welding Problems

FAULT CAUSE REMEDY

1 Excessive bead build up or

poor penetration or poor

fusion at edges of weld.

Welding current is too

low

Increase weld current and/or faulty joint

preparation.

2 Weld bead too wide and

ﬂat or undercut at edges

of weld or excessive burn

through.

Welding current is too

high

Decrease weld current.

3 Weld bead too small or

insufﬁcient penetration or

ripples in bead are widely

spaced apart.

Travel speed too fast Reduce travel speed.

4 Weld bead too wide or

excessive bead build up or

excessive penetration in

butt joint.

Travel speed too slow Increase travel speed.

5 Uneven leg length in ﬁllet

joint

Wrong placement of

ﬁller rod

Re-position ﬁller rod.

BASIC WELDING GUIDE 4-14 Manual 0-5345

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Tweco ArcMaster 401S Manuel d'utilisateur Page 52

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