SIP Welders

Top SIP welders for ARC, MIG and TIG welding

posted on: 25 Sep 2012


SIP offers one of the most comprehensive ranges of welding equipment on the market.

As designers and manufacturers, the company has been the name in welding for over 3 decades and has built its reputation on supplying quality, feature rich equipment that gives unrivalled power, performance and portability alongside exceptional value. All equipment is specifically designed to produce superlative results that are both consistent and reliable. The SIP welder range covers Arc, Mig and Tig welding in addition to inverters, plasma cutters, coolers and extractors.



ARC Welding

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SIP Arc welders can be used by all potential users, from serious DIY/trade welders to full-time industrial users. The SIP Weldmate T160P is ideal for DIY users and offers portability, ease-of-use and convenience at value-for-money prices.The Turboweld 8 has a unique 'Double Vortex Transformer' with special air flow ducts. This machine is one of the most heavy duty Arc welders available on the market. Exclusive to SIP's Hi-Tech range is the Weldmate P174 Arc Inverter Welder which provides incredible power and high quality results from remarkably lightweight, but reliable power sources.

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Arc welding, more accurately described as Manual Metal Arc welding (Mma) enables two or more pieces of metal to be fused together by means of an electric Arc, the arc is generated by electric current flowing directly across the gap between the metal being welded and an arc welding electrode.

The electric arc causes a portion of the metal work piece to melt forming a molten pool of metal. The arc welding electrode, which is coated with flux to prevent the molten material from reacting with the surrounding atmosphere and to facilitate the stability of the arc.

During welding the flux is simultaneously melted/vaporized, this flows to the molten pool of material shielding it from the air and forms a coating over the cooling weld bead. The coating on the weld bead is called slag and is removed after cooling. Basic arc welders do not make use of complicated electronics which means they are reasonably priced, reliable and uncomplicated. However, they do have a few limitations, such as being restricted to weld thicker material from a minimum of 1.5mm and can only weld a limited range of materials.



MIG Welding

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SIP Autoplus 181DP Dual Purpose Welder professional Mig welders combine fantastic quality, durability and value-for-money. The Autoplus 181DP is a powerful and robust machine with superb features, perfect for any busy automotive garage or workshop. The SIP Weldmate T130 gas/gasless Mig welder is ideal for car body panels. This dual purpose Mig welder operates in both gas and gasless mode for mild steel, aluminium and stainless steel with the appropriate gas and/or wire. The extra low current performance delivers a 25A minimum power for welding very thin materials (in gas mode). For turbo gas/gasless welding the SIP Migmate T135 is a fantastic option. 135amp welding power, will weld 1.0mm to 5.4mm mild steel, and is ready to use in gasless mode.

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Mig welding makes use of a continuously feed wire electrode and a shielding gas. The welding current is passed to the welding torch which has the continuous metal wire fed through it by means of an adjustable wire feed system. An arc is generated between the wire and the work piece causing the wire to melt simultaneously with the metal work piece. This produces a molten pool that creates the weld similar to that of Mma welding.

However a shielding gas is also fed to the touch during the entire process to act as the shielding agent, this prevents the molten material from reacting with the surrounding atmosphere.

There are two major differences between Mma and Mig welding. The first is that instead of a flux coated electrode, MIG uses a continuously fed wire from a reel, therefore the frequent stopping to change the welding electrode is avoided and no readjustment between the wire and the work piece is necessary since the wire being consumed is replaced continuously at the correct speed by the wire feed assembly.

The second major difference is instead of having a flux coating a shielding gas is used to protect the weld pool from the atmosphere, this leaves little or no residue giving the benefit of cleaner welds and allows additional welds performed in the same area straight away.

Mig welding is a more sophisticated, easier and cleaner process, but more expensive than Mma. It is particularly suitable for welding very thin sheet metals such as car body panels.



TIG Welding

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SIP Hi-Tech range of inverter welders, including TIG welders, use the very latest technology in welding to provide users with the best welding capacbilities and functions. Subject to 37 patents! For the more professional user the Weldmate P178 DC Tig / Arc inverter welder has very high duty cycle of 160amps (@ 60% Tig putput) and 10amp extra low current performance. Supplied complete with Tig and Arc accessories. Ideal for specialist users, the SIP Weldmate T214 is a highly reliable yet lightweight package. With pulse to aid welding on very thin materials.The SIP Weldmate T177 combined machine incorporates the latest inverter technology to give superb performance on the widest range of metals, including aluminium. Very high duty cycle, stable and consistant arc, all contributes to make this SIP range very hard to beat.

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Tig Welding stands for 'Tungsten Insert Gas' is similar in principle to both Mma and Mig welding. An arc is created between an electrode and the work piece, as in Mma, and a shielding gas is used, as in Mig welding.

The electric arc is provided by the Tig welding plant and passes between the electrode, made from a very durable material called Tungsten, to the work causing a portion of the metal work piece to melt, forming a molten pool of metal. A non-fluxed filler rod, compatible with the work material, is added to the molten metal pool to form the weld.

When Tig welding the initial arc can be struck by ‘scratch starting’, as in the Mma method, where the Tungsten is ‘scratched’ against the work piece until the arc is created. The Tungsten is then drawn away sufficiently to avoid further contact whilst still maintaining the arc. The distance between the work piece and the Tungsten is governed by the amount of welding current in use and the Tungsten diameter, as for Mma welding.

Some more sophisticated Tig machines offer the facility of High Frequency arc ignition to start the arc, eliminating the need for contact between the tungsten electrode and the work. This method removes the problem Tungsten electrode and work contamination, which can be experienced when ‘scratch starting’. Additionally, this extends the life of the Tungsten electrode and ensures an extremely clean, contamination free weld.

As in Mig welding a shielding gas is fed to the Tig torch during the entire Tig welding process to act as a shielding agent, this prevents the molten material from reacting with the surrounding atmosphere. The shielding gas used in most Tig applications is pure Argon. Argon is an inert gas, which is in no way active on the weld pool, the argon acts purely as a shielding agent.

Unlike Mma or Mig welding, during the Tig welding process the Tungsten is not rapidly consumed it is simply used to transfer the arc to the work piece. Some Tungsten erosion does occur during the process but to accommodate this the Tungsten is held in a torch collet, similar to a propelling pencil, enabling a new section of Tungsten to be fed through manually when erosion occurs.

The Tig welding process is very precise, controllable and capable of giving high quality welds on most types of metal. The process does however, require some skill to ensure top quality results.

Most Tig welding plants are multi functional offering the DC Tig and Mma capability, Some Tig plants are AC and DC output in both Tig and Mma. The latter type offers ultimate flexibility, allowing the use of virtually all special Mma electrodes and also the ability to Tig weld aluminium.

DC Tig is used for most materials with the exception of aluminium alloys AC TIG is used for aluminium and its alloys.