Lincoln Electric High-Speed and High-Deposition Welding manual Bevel and V Groove Joints

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W A V E F O R M C O N T R O L T E C H N O L O G Y T M

Tandem MIG

High-Speed and High-Deposition Welding

Using Tandem MIG

For High-Deposition Applications

Flat and Horizontal Fillet Welds 6 mm and Larger

Railroad, Structural, Industrial

Equipment, Ship Building, Off Road

Wheel Manufacturing

Flat and horizontal fillets common to structural building components, offshore platforms, railcar haulers, machine bases, large vehicle wheels, undercarriages/truck suspensions and other fabricated components of metal thickness of 6 mm and greater are performed at deposition rates ranging from

21 - 35 lbs./hr.

Single pass 5/16” flat fillets are commonly welded at 24 - 30 ipm with (2) .045” diameter electrodes.

Single pass 5/16” flat fillets are commonly welded at 27 - 40 ipm with (2) .052” diameter electrodes.

Bevel and “V” Groove Joints

Heavy Plate Fabrication, Structural Members and Industrial Equipment

Single and multi-pass beveled butt welds used in industries fabricating ship hulls, earth moving equipment, structural platforms, pressure vessels, beams and similar heavy plate weldments are performed at deposition rates ranging from

22 - 35 lbs./hr. Welds are commonly performed using like electrode diameters, either .045 or .052 inch diameter. The lead electrode provides root penetration, the trail electrode adds to sidewall penetration.

“J” and “U” Groove Butt Welds

Earth Moving Equipment and

Heavy Plate Fabrication

Single and multi pass “J” and “U” groove joints common to undercarriages, rollover protection equipment, sticks, booms, fifth wheels, frames, hydraulic cylinders, pant legs and similar earth moving equipment components are welded at deposition rates ranging from 22 - 35 lbs./hr. Welds are performed at a 30 - 50% reduction in heat input when compared to larger diameter single electrode processes. Lower heat input can substantially reduce post weld straightening activity caused by distortion.

APPLICATION

5/16

1/2” Flat Fillet at 20 ipm

8 mm Horizontal Fillet

Multi-pass Butt Weld

2 Pass “J” Groove

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Contents Tandem Migtm Tandem MIG What Is It?How Does It Work? Flat and Horizontal Lap Welds 1.5 mm 5 mm Using Tandem MIGFlat and Horizontal Fillet Welds 3 mm 6 mm Joggle Joints 1.5 mm 4 mmBevel and V Groove Joints Flat and Horizontal Fillet Welds 6 mm and LargerU Groove Butt Welds Earth Moving Equipment Heavy Plate FabricationProblem Single Wire Gmaw Better Weld Metal Follow CharacteristicsSolution Tandem MIG Comparing High-Speed Tandem MIGHigher Deposition rates Comparing High-Deposition Tandem MIGTravel Speed Comparison Horizontal Fillet Weld Reduced Heat Input and Improved Bead ProfilesDeposition Rate Comparison Torch Positioning Lead ArcTrail Arc Joint Selection Shielding GasWork Lead Connection Configuring Tandem MIG Models AD1201 1 and AD1201 Configuring Tandem MIGLincoln Welding Systems Featuring Tandem MIG Power Feed 10R Wire FeederPower Wave 655R Power Wave 455MAccu-Trak SuperArc/SuperGlideAccu-Pak