|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.
WELD HEAD MOUNTING/ROTATION
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.
TORCH OSCILLATION (WEAVE)
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.
ARC GAP CONTROL (ARC VOLTAGE CONTROL)
The Arc Gap Control electronically maintains a desired arc length as the torch rotates around the pipe.
USE ON PREHEATED PIPES
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.