The welding torch, also known as the welding gun, is a tool for welding or preheating ferrous or non-ferrous metal workpieces by using oxygen and medium and low pressure acetylene as a heat source. It is the main tool for gas welding operations. The function of the welding torch is to evenly mix the combustible gas and oxygen in a certain proportion, and spray it from the welding nozzle at a certain speed to form a flame with a certain energy rate, a certain composition, suitable for welding requirements and stable combustion. The quality of the welding torch directly affects the welding quality of gas welding, so it is required that the welding torch should have a good performance of adjusting the ratio of oxygen to combustible gas and the flame energy rate, so that the speed of the mixed gas ejection is equal to or greater than the combustion speed, so that the flame is stable to burn. At the same time, it is also required that the weight of the welding torch should be light, and the operation should be convenient, safe and reliable.
The function of the cutting torch is to mix oxygen and acetylene in proportion to form a preheating flame, and inject high-pressure pure oxygen onto the workpiece to be cut, so that the metal to be cut is burned in the oxygen jet, and the oxygen jet will burn the molten metal generated by the combustion. The slag (oxide) is blown away to form a kerf. The torch is the main tool for gas cutting workpieces.