Patent
Ceramic weld insulator and metal weld gear combination for an improved micro weld head component of an orbital tube welding apparatus
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TLDR
In this article, a combination of materials, including a ceramic weld insulator and a metal weld gear, is used for welding pipe and tubing butt joints. Butt joints are welded in a more concentric tungsten travel path, increasing the duty cycles of the weld head, minimising erratic and wandering arcing, creating an electrical insulation yielding minimal expansion, and allowing for increased clamping surface for improved tube alignment.Abstract:
The invention is of an improvement to orbital welding heads and welding systems for welding pipe and tubing butt joints, consisting of a novel combination of materials, including a ceramic weld insulator and a metal weld gear. Such a combination, which has a greater dielectric strength than a plastic housing design, results in a more concentric tungsten travel path, increases the duty cycles of the weld head, minimizes erratic and wandering arcing, creates an electrical insulation yielding minimal expansion, allows for increased clamping surface for improved tube alignment, and provides a compact and very robust weld head.read more
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Orbital weld head
TL;DR: An orbital weld head includes a metal insert and rotor, and covers are made from mica laminate as mentioned in this paper, where the rotor and insert have interengaging portions, preferably trapezoidal, that cause the rotor to move axially when it expands from heat, thus minimizing binding.
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TL;DR: In this paper, a device for welding in an orbital welding method using welding gas in an arc welding method, comprising a receiving region into which a round tubular object to be welded can be inserted, is described.
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Orbital welding apparatus
TL;DR: An orbital welding apparatus comprising a modular weld head unit including a circular rotor carrying a welding electrode for rotation about an axis for welding abutting ends of tubular members positioned in alignment on the axis is described in this article.