Uploaded to WestermansWelders yesterday! Plasma Cutting demonstration with mild steel of the Hypertherm HPR260 Hydefinition plasma running with Burny 10 LCD + CNC unit.

The Hypertherm HPR260 plasma provides Hydefinition, virtually dross-free cutting at fast speeds on up to 64mm (mild steel). You can find more information on this unit and the rest of the Hyperformance plasma range from Hypertherm by clicking here.

ESAB, Esprit, Messer Cutting Systems and Farley also provide quality plasma cutting systems for a variety of specifications and sheet metal fabrication, click here to view our current stock of fully serviced and refurbished plasma and gas profile cutting machines.

One of our latest uploads to the WestermansWelders YouTube channel is a demo of the Swagelok Cajon D75 orbital welding machine, with closed welding head for thicknesses of 6-25mm. The demonstration is on a piece of steel tubing.

Orbital welding machines are used for pipe and tube welding, tube to tube, tube to plate and tube to tube sheet welding, most commonly used in industries such as pharmaceutical and the food and beverage industries. For more information on the orbital welding process and our current orbital welding machines in stock, please click here.

We are pleased to have secured and supplied an order with Rautpohjan Konepaja in Jyväskylä for a used Bode boom welder fitted with Lincoln submerged arc welding equipment.

The Finish company specialises in plate work and welding. Semi-heavy duty and demanding plate work and welding represent the company’s areas of expertise. Indeed, some of the best experts in the field work at the Rautpohja plant: welding engineers and technicians as well as other welding specialists. Their staff possess decades of experience in extensive plate work and welding, including cutting, plate and section iron forming and bending as well as manual welding and submerged arc welding.

Their experience in submerged arc welding, especially, is among the best on the market. The welding quality of the submerged arc stations and the ability to get work done quickly are advantages, which cannot necessarily be achieved by other means. The materials processed include structural, wear-resistant, heat-resistant and stainless steels. They carry out plate and welding work for the maritime industries, offshore and sub-sea industries and the energy sector. Another area of Konejpaja’s experience is in the extremely demanding paper and chemical pulp industry.

You can see similar used welding equipment and submerged arc welding machines supplied to the Häkkinen Group of companies by Westermans International on the web site.

Do you know what submerged arc means?

What is the difference between SAW and SMAW?

Submerged arc welding (SAW) is a common arc welding process which was originally developed by the Linde Union Carbide Company. It requires a continuously fed consumable solid or tubular (flux cored) electrode. The molten weld and the arc zone are protected from atmospheric contamination by being “submerged” under a layer of flux consisting of lime, silica, manganese oxide and calcium fluoride amongst other compounds. When molten, the flux becomes conductive, and provides a current path between the electrode and the work. This thick blanket of flux completely covers the molten weld, thus preventing spatter and sparks as well as suppressing the extreme ultraviolet radiation and fumes that are a part of the shielded metal arc welding process (SMAW).

SAW is normally operated automatically, however semi-auto (handheld) Sub Arc guns with pressurized or gravity flux feed delivery are available. The process is normally limited to the flat or horizontal-fillet welding positions (horizontal groove position welds have been achieved with arrangements to support the flux). Deposition rates approaching 100 lb/h (45kg/h) have been reported, compared with 10lb/h (5 kg/h max) for shielded metal arc welding SMAW. Although currents ranging from 300 to 2000 A are commonly utilized, currents of up to 5000 A have also been used with multiple arcs.

Single or multiple electrode wire variations of the process exist. SAW strip cladding uses a flat strip electrode e.g 60 x 0.5mm, DC or AC power can be used, and combinations of DC and AC are common on multiple on multiple electrode systems. Constant voltage welding power supplies are most commonly used, however constant current systems in combination with a voltage sensing wire-feeder are available.