A portable spot welding machine, sometimes called portable welders or portable welding machine, is used to join two or more metals together by means of a welder. Welding procedures for most metals can be done at room temperature, eliminating the typical melting process during metal fabrication. Welding machines have various parts, such as electrodes, fusion chamber, filler material and tank, which are required for each welding process. There are many types of welders on the market.
Portable welders are usually either a gas-fueled or an electric type, depending on the power source. The gas fuel portable spot welding machines are better suited for welding thinner metals and for use in low-impurities environments. They are also preferred for the process of welding galvanized or tungsten alloys. Electric portable spot welders are best used in welding thicker metals and are good for use with both electrical and manual pressure. These welding machines allow for continuous work even when conditions change, such as while waiting for the weld to cool, or when water is involved. Portable welders can be used for both in-line and continuous-beam welding.
An electric portable spot welding machine is also known as a constant current machine (CCM). It uses a power supply to create an electrical arc between the welding source and the target surface. This is done by controlling the conductivity of current through the use of varying electrical intensities and temperatures. This creates the ideal environment for inert gases to be used as the filler material in the welding process. However, using too much gas can cause some of the welds to break, and the machine must be shutdown immediately to prevent the possibility of a dangerous gaseous accident.
The difference between an electric and a gas portable resistive spot welder is the type of electrode used. Gas ones use consumable electrodes, which must be replaced after each welding session. With the use of an electric resistance spot welder (ERW), electrodes only need to be changed when it is time to weld the next panel.
The most common types of electrodes that are used in portable resistive spot welding machines are ferromagnetic, permanent magnetic, and thermal conductivity ones. A popular choice for users of thermal conductivity welders is titanium. This is because of the extreme flexibility of this metal and because of its high thermal conductivity, which is why many consider it a better option than steel.
The application of a single phase or multi-phase welder is also an important aspect when choosing your welding equipment. For instance, if you need to weld several panels of stainless steel, you will have to choose a portable welder that has the ability to weld both softer and harder metals. If you want to weld aluminum, you should go for a portable one with a multi-phased melting chamber. The last option is a plain single-phased spot welder. If you are a beginner, you should purchase a blunt tip welder for easier welding tasks.