D-HEAD WELD HEAD Model 420 Orbital Weld Heads for Filler Wire Welding of Pipe Use with
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Precision Tools for Precise,
Repeatable Welds
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The D-Head model weld head is "full function" - with the capability of reproducing all the precise motions of a skilled manual GTAW welder. It is specifically designed for multipass pipe welding applications. The weld head consistently produces welds meeting the most stringent code quality standards. The D-Head is used for applications with radial and axial clearance constraints. Used with the Pipemaster Power Source Models, this weld head improves productivity by increasing duty cycle, reducing repair rates and producing welds of consistent quality. The D-Head is a compact head for smaller diameter pipe applications with limited radial and axial clearance around the weld. Ideal for orbital pipe welding. The weld head is mounted on the pipe by means of metal Guide Rings, which are available for all standard pipe / tube sizes. The weld head mounts entirely on one side of the joint, allowing use for pipe-to-fitting welds. The compact Head-mounted wire feeder is electronically controlled for accurate and repeatable filler wire delivery. It mounts a standard 0.9 kg (2lbs.) spool. For applications requiring minimum radial clearance, a special "Low Profile" wire spool is used. The width and speed of the torch oscillation stroke are independently programmed. Torch "Dwell" is independently adjustable at both oscillation stroke end points. A "Cross Seam Adjustment" steering control on the remote Pendant allows the welder to track the torch on the weld seam without the need for manual adjustments near the arc. Pulsed current is automatically synchronized with torch oscillation when both functions are operated simultaneously. The Arc Gap Control electronically maintains a desired arc length as the torch rotates around the pipe. The D-Head drive system incorporates heat-tolerant components and a water-cooled housing for use on CrMo and other alloys requiring preheat. Mounting the head on an oversize Guide Ring with adapter feet creates an air space, preventing heat damage. |
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| Process: | GTAW, TIG |
Weld Head Type: |
Open arc. Entire Head rotates around pipe. Mounts on pipe using guide rings. |
| Pipe/Tube Size Range: | 25.4mm - 355.6mm (1.0" - 14") OD |
Functions: |
Torch rotation, Filler wire feed, Electronic torch oscillation, Electronic arc gap (AVC) control |
| Features: |
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Options: |
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| WELD HEAD/CONTROLLERS SPECIFICATIONS | |
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| Pipe Size Range | 2.5cm (1" and larger) |
Filler Wire Module Wire Size Speed Capability Spool Size |
0.8mm, 0.9mm, 1.0mm (.030", .035", .040") 254cm (100") per minute 0.9kg (2lbs.) Standard 0.5kg (1lbs.) Low Profile |
Oscillation Module Max. Oscillation Stroke Amplitude Max. Oscillation Speed Oscillation Dwell Cross Seam Adjustment |
16mm (0.625") 152cm (60") per minute 0 - 1 second ±6.4mm (0.25") |
Arc Gap Control Module Stroke |
1.3cm (0.5") |
| Torch Propulsion Module Max. Rotation Speed | 25cm (10") per minute |
Water Cooled Torch Amperage Capability |
200A Continuous |
Torch Adjustment Capability Torch Lead/Lag Adjustment Torch Tilt Adjustment |
±15 degrees (manual) ±10 degrees (manual) |
Head Weights & Dimensions Weight Axial Clearance Torch C/L to Rear Extremity Torch C/L to Front Extremity Radial Clearance |
3.6kg (8lbs.) 22cm (8.51") 1cm (0.4") 6.4cm (2.5") with Standard Spool 5.1cm (2.0") with Low Profile Spool |
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