Miller Electric Blue Star 3500 manual Butt Joints, Lap Joint, Tee Joint, 16 in 1.6 mm Tack Welds

12-10. Butt Joints

1

1/16 in (1.6 mm)

2

30°

1 Tack Welds

Prevent edges of joint from drawing together ahead of electrode by tack welding the materials in position be- fore final weld.

2 Square Groove Weld

Good for materials up to 3/16 in (5 mm) thick.

3 Single V-Groove Weld

Good for materials 3/16 − 3/4 in (5-19 mm) thick. Cut bevel with oxy- acetylene or plasma cutting equip- ment. Remove scale from material after cutting. A grinder can also be used to prepare bevels.

3 4

Create 30 degree angle of bevel on materials in V-groove welding.

4 Double V-Groove Weld

Good for materials thicker than 3/16 in (5 mm).

S-0662

12-11. Lap Joint

30°	30°
	Or Less
Or Less
1	1

2	3
Single-Layer Fillet Weld	Multi-Layer Fillet Weld

1Electrode

2Single-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.

S-0063 / S-0064

12-12. Tee Joint

2

1

45°

Or Less2

1

1Electrode

2Fillet Weld

Keep arc short and move at definite rate of speed. Hold electrode as shown to provide fusion into the corner. Square edge of the weld surface.

For maximum strength weld both sides of upright section.

3 Multi-Layer Deposits

Weld a second layer when a heavi- er fillet is needed. Use any of the weaving patterns shown in Section 12-9.Remove slag before making another weld pass.

3

S-0060 / S-0058-A / S-0061

OM-498 Page 44 Return To Table Of Contents