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Buyers of Column Boom Manipulators for welding

Wanted Column Boom Welders

Have you seen any of welding plant like this sitting redundant in the heavy duty fab shops you visit?

We are looking to buy a Used 4m x 5m boom welding #manipulator.  Any make as long as one of the latest models.

It is worth asking around as we can pay you a Finder’s Reward and Commission if the deal is successful.

These column and booms welders are often set up with subarc sets and used to make large vessels and tanks in industries like renewal energy (wind towers) oil and gas (cryogenic tanks) and ship building.

Brands we are interested in are Bode, ESAB, SAF, Pema, Gullco, Koike Aronson, Ransome, Preston-Eastin and Pandjiris

Get in touch by completing our WANTED form on the web site or give us call.

#Rapid Decisions, Payment and Collection from a Worldwide reputable dealer.


If you are looking to purchase a Column and Boom, we have a great choice in stock today. From light to heavy duty, numerous welding sets can be added and we can supply the welding positioners and pipe rotators to semi automate your welding process.

For more details view our Stock of these manipulators on our web site

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Taylor Stud welder wanted

Wanted Taylor CD m8 stud welder

Taylor M8 CD Stud Welder


Tell us about any Used Taylor Stud welding machines today and we can usually make instant decisions on price, payment and collection.  Complete the form or give us a call.

Have another brand or model? Give it a go, offer it to us.

We buy and sell all the leading brands of Stud Welding Equipment new, used and refurbished.  All in stock for immediately availability.


Need Rental or Hire of a Stud Welder for a Short Term contract? Give our Sales Team a call to discuss various options. 

 

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Machine of the Week – Esprit D1500 CNC Plasma Cutting System

Machine of the Week

Esprit D1500 CNC Plasma Cutting System

EspritLightningD1500

 

 

 

 

 

 

 

 

 

Complete CNC plasma cutting system High Definition Hypertherm plasma power source.

Key Features:

  • Complete with Edge CNC system with auto height control and Gas Console
  • Hypertherm HPR130 production cuts mild steel 16 mm (5/8″), pierce capacity mild steel 32 mm (1 1/4″) Maximum cutting capacity (edge start) mild steel 38 mm (1 1/2″)
  • Cutting Length: 6500mm
  • Rail Length: 8000mm
  • Year of manufacture 2005

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Click here for full specifications and to make an enquiry or call Craig for more details on +44(0)1162696941

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SubArc welding equipment wanted

Submerged Arc Welders

Westermans – Specialist Dealers in new and pre-used Sub-Arc Welding Equipment at affordable prices

Sell – Buy – Hire

sub-arc-welding-2Equipment for submerged arc welding

The submerged-arc welding (SAW) process is similar to MIG where the arc is formed between a continuously-fed wire electrode and the work piece, and the weld is formed by the arc melting the work piece and the wire. However, in SAW a shielding gas is not required as the layer of flux generates the gases and slag to protect the weld pool and hot weld metal from contamination. Flux plays an additional role in adding alloying elements to the weld pool.

Essential equipment components for SAW are:

Power source
SAW head
Flux handling
Protective equipment

 

As SAW is a high current welding process, the equipment is designed to produce high deposition rates.

Compliments of Welding Specialists Arc Energy Resources of England

Brands:

ESAB, Lincoln Electric, Miller Welding, Fronius, Gullco and SAF

What we do:

We buy and sell all associated equipment to sub-arc welding including, Power sources, Column and Boom Manipulators, Rotators, Tractors, Positioners, Flux hoppers and accessories.  All of our equipment is prepared to order.

lincoln-dc-1000-amp

Power source

SAW can be operated using either a DC or an AC power source. DC is supplied by a transformer-rectifier and AC is supplied by a transformer. Current for a single wire ranges from as low as 200A (1.6mm diameter wire) to as high as 1000A (6.0mm diameter wire). In practice, most welding is carried out on thick plate where a single wire (4.0mm diameter) is normally used over a more limited range of 600 to 900A, with a twin wire system operating between 800 and 1200A.

In DC operation, the electrode is normally connected to the positive terminal. Electrode negative (DCEN) polarity can be used to increase deposition rate but depth of penetration is reduced by between 20 and 25%. For this reason, DCEN is used for surfacing applications where parent metal dilution is important. The DC power source has a ‘constant voltage’ output characteristic which produces a self-regulating arc. For a given diameter of wire, welding current is controlled by wire feed speed and arc length is determined by voltage setting.

esab-submerged-arc-packages

AC power sources usually have a constant-current output characteristic and are therefore not self-regulating. The arc with this type of power source is controlled by sensing the arc voltage and using the signal to control wire feed speed. In practice, for a given welding current level, arc length is determined by wire burnoff rate, i.e. the balance between the welding current setting and wire feed speed which is under feedback control.

Square wave AC square wave power sources have a constant voltage output current characteristic. Advantages are easier arc ignition and constant wire feed speed control.

 

Welding gun

SAW can be carried out using both manual and mechanised techniques. Mechanised welding, which can exploit the potential for extremely high deposition rates, accounts for the majority of applications.

ESAB Mechtrac Sub Arc System

Manual welding

For manual welding, the welding gun is similar to a MIG gun, with the flux which is fed concentrically around the electrode, replacing the shielding gas. Flux is fed by air pressure through the handle of the gun or from a small hopper mounted on the gun. The equipment is relatively portable and, as the operator guides the gun along the joint, little manipulative skill is required. However, because the operator has limited control over the welding operation (apart from adjusting travel speed to maintain the bead profile) it is best used for short runs and simple filling operations.

 

 

ESAB A2 saw tractorMechanised welding – single wire

As SAW is often used for welding large components, the gun, wire feeder and flux delivery feed can be mounted on a rail, tractor or boom manipulator. Single wire welding is mostly practised using DCEP even though AC will produce a higher deposition rate for the same welding current. AC is used to overcome problems with arc blow, caused by residual magnetism in the workpiece, jigging or welding machine.

 

Wire stickout, or electrode extension – the distance the wire protrudes from the end of the contact tip – is an important control parameter in SAW. As the current flowing between the contact tip and the arc will preheat the wire, wire burnoff rate will increase with increase in wire stickout. For example, the deposition rate for a 4mm diameter wire at a welding current of 700A can be increased from approximately 9 kg/hr at the normal 32mm stickout, to 14 kg/hr at a stickout length of 178mm. In practice, because of the reduction in penetration and greater risk of arc wander, a long stickout is normally only used in cladding and surfacing applications where there is greater emphasis on deposition rate and control of penetration, rather than accurate positioning of the wire.

SAW can be operated with more than one wire. Although up to five wires are used for high deposition rates, e.g. in pipe mills, the most common multi-wire systems have two wires in a tandem arrangement. The leading wire is run on DCEP to produce deep penetration. The trailing wire is operated on AC which spreads the weld pool, which is ideal for filling the joint. AC also minimises: interaction between the arcs, and the risk of lack of fusion defects and porosity through the deflection of the arcs (arc blow). The wires are normally spaced 20mm apart so that the second wire feeds into the rear of the weld pool.

Gun angle

In manual welding, the gun is operated with a trailing angle, i.e. with the gun at an angle of 45 degrees (backwards) from the vertical. In single wire mechanised welding operations, the gun is perpendicular to the workpiece. However, in twin wire operations the leading gun is normal to the workpiece, with the trailing gun angled slightly forwards between an angle of 60 and 80 degrees. This reduces disturbance of the weld pool and produces a smooth weld bead profile.

 

saf-sub-arc

 Flux handling

Flux should be stored in unopened packages under dry conditions. Open packages should be stored in a humidity-controlled store. While flux from a newly-opened package is ready for immediate use, flux which has been opened and held in a store should first be dried according to manufacturer’s instructions. In small welding systems, flux is usually held in a small hopper above the welding gun. It is fed automatically (by gravity or mechanised feed) ahead of the arc. In larger installations the flux is stored in large hoppers and is fed with compressed air. Unused flux is collected using a vacuum hose and returned to the hopper.

Protective equipment

Unlike other arc welding processes, SAW is a clean process which produces minimum fume and spatter when welding steels. (Some noxious emissions can be produced when welding special materials.) For normal applications, general workshop extraction should be adequate.

Protective equipment such as a head shield and a leather apron are not necessary. Normal protective equipment (goggles, heavy gloves and protective shoes) are required for ancillary operations such as slag removal by chipping or grinding. Special precautions should be taken when handling flux – a dust respirator and gloves are needed when loading the storage hoppers.

Have you surplus sub arc welding equipment to dispose of? Westermans will handle inspections, payment and collection quickly and always pay great prices for the latest models. 

Please contact our Buying Team with any surplus SAW plant.  We pay commission on successful leads too so it doesn’t have to be your stock.

For our full range of submerged arc welding equipment for sale today follow this link to our website. Or call our Sales department to discuss. We specialise in selling bespoke packages worldwide.

If you have enjoyed reading this Blog, why not Register for our newsletter or better still suggest some topics we can cover.

Remember USED equipment offers quality without a high price tag and well worth considering for your next project.

 

 

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Machine of the Week – Fronius Hotwire Cladding Stations

Machine of the Week

Fronius Hotwire Cladding Systems – 2 In Stock

fronius-cladding-1

 

Recently Arrived Into Stock – YOM 2014

Key Features:

  • The Compact Cladding Cell is designed for maximum cost-effective overlay welding on components up to a diameter of 1 m (3.94 in) and a maximum weight of 2500 kg (5511 lb). Despite its compact design,
  • The Compact Cladding Cell is an extremely powerful cladding system that provides simple operation, precise movements and extensive data logging capabilities.
  • Compact CNC Weld Overlay Cladding Cell with Fronius FPA 9000 CC Control
  • The power-team: TransTig 5000 Job with high-performance cooling unit FK 4000 R and TransTig 2200 Job – fully digital for the best welding quality with TIG hotwire.
  • 1000KG Welding positioner fitted with a 900mm table fitted with 500mm Chuck. Slip ring systems transfer power when a face plate is rotating and are used to operating heating elements for pre-heating components.
  • Overall height 2400mm
  • Area required 2000 x 2700mm additional space required 600 x 650mm working area
  • Thermal Heating Pads and Unit 50kva

Click Here for Full Details and to Make an Enquiry, or call Craig on +44(0) 1162 696941.

fronius-2

fronius-1

 

 

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