A spot welding machine is most commonly known as a metal working machine. It is used in a wide variety of metalworking applications to weld several pieces of metal together. Metal working machines are usually one or more machines and the operators sit at opposite ends of a shop and control the equipment with either a joystick or a keyboard.
The biggest advantage of a spot welding machine over other metalworking equipment is its ability to produce high quality welds. The main component of the machine is the welding torch which is called the ‘anvil’. There is a chamber in the base of the anvil where liquid fuel is added. When the torch is pressedurously on to the weld, an electric current is produced by a flywheel and this induces energy in the electrode. This electrode, which is usually made from tungsten electrodes, is the one in contact with the welding surface and produces the arc which is responsible for producing quality welds.
When the electrode is almost touched, the current is turned off and a fanfare is started. This causes the electrode to travel to the other end of the anvil, but this time it comes in contact with the hot metal sheet. This sheet metal is called the ‘striae’ and the arc are directed towards the welding target. Since the electrode is almost touching the target, there is very little heat generated and therefore you get a fast, clean, and continuous weld.
Different types of spot welding machine manufacturers use different technologies to convert the input voltage to electrical current. Some manufacturers use high current alternating current (AC) while others use direct current (DC). High AC machines are suitable for larger shops that need continuous welding operations whereas DC machines are better suited for shops that only do intermittent welding operations. This means that a smaller shop or one that operates on a small regular basis will have to buy both types of machines. The transformer used to change the voltage is called a ‘transformer’ and it is located inside the machine.
Electric welders are the most common type of machines used today, although there are still a few gas welders that have been made use of. Most electric welders will have an automatic cut off switch, whereas gas welders tend to have manual cutoff switches. If the welding equipment uses rechargeable batteries, then the batteries will be charged during the welding operation and then the machine will shut itself off when the charge runs out. This feature makes electric welders much safer than their gas-powered counterparts. When welding on flammable materials such as tungsten, it is highly recommended that all electric welders have a separate circuit breaker to prevent the possibility of an explosion occurring when there is an overload of current passing through the circuit.
When it comes to safety, you should take a look at the welder’s hand guard and electrode holder, which are essential for working with live electrodes. There should also be some type of safety indicator on the power supply to make sure you know what the maximum amperage is for the power supply. All of these safety elements are easily found online, and there are several websites that have a complete guide to buying the right electrical equipment to meet your needs. The welding equipment you buy will obviously need to meet government regulations before it can be sold, but in the end you will be able to purchase quality welders that will last for years to come, and give you service for many years to come.