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The Output Current Of The Spot Welder Can Be Divided Into A Few
Jun 14, 2018

The spot welder (electricweldingmachine) is actually a transformer with the characteristic of falling outside, which turns the 220V and 380V AC to low voltage DC, and the spot welder can be divided into two types according to the type of output power, one is AC power and the other is DC. The DC spot welding machine can be said to be a high power rectifier, which is divided into positive and negative two poles. When the AC input is input, the rectifier is rectified by the rectifier after the transformer is pressed, and then the power supply with the characteristic of falling outside is output. The output end will produce a huge voltage change when it is connected and disconnected, and the poles ignite the arc when short circuit is short circuited. The welding electrodes and welding materials are melted by the generated arc, and then cooled to achieve the purpose of binding them. The welding transformer has its own characteristics, and its external characteristic is the sharp drop of voltage after the ignition of the welding rod. Welding, because of its flexibility, simplicity, reliability, and even the advantages of the same strength as the parent material after welding, is widely used in various industrial fields, such as aerospace, ships, cars, containers and so on. It is to use the high temperature arc generated by the positive and negative poles in the short circuit to melt the solder and the welding material on the electrode, so as to achieve the purpose of combining them. The structure of the spot welder is very simple. It is a large power transformer that turns 220V AC to low voltage. The power of large current can be either DC or AC. The electric welding transformer has its own characteristics, that is, the characteristic of voltage drop. When the electrode is ignited, the voltage is reduced and the working voltage of the spot welder is adjusted. In addition to the one 220/380 voltage transformation, the two coil has a tap changing voltage, and the core is also used to adjust the voltage. The adjustable iron core... The spot welding machine is generally a large power transformer, which is made of the principle of inductor, one, spot welding. Advantage: the spot welder uses electric energy to convert electric energy into thermal energy instantaneously. Electricity is very common. The spot welder is suitable for working in a dry environment without too many requirements. It is widely used in various fields because of small size, simple operation, convenient use, fast speed and strong weld seam, especially for strength requirements. It is very practical. It can connect the same metal material (it can also connect the different metal, but the welding method is different). After heat treatment, the weld is as strong as the parent material, and the seal is very good. This solves the problem of sealing and strength for the manufacture of the storage gas and the liquid container. Two, spot welding machine shortcomings: spot welder in the process of use of the welding machine will produce a certain magnetic field, arc burning will produce radiation, arc in the light of infrared, ultraviolet and other kinds of light, as well as metal steam and smoke and other harmful substances, so the operation must be enough protection. Welding is not suitable for the welding of high carbon steel. Because of the crystallization and segregation and oxidation of weld metal, the welding performance of high carbon steel is bad, it is easy to crack after welding and produces hot crack and cold crack. The low carbon steel has a good welding inductance when it is connected and disconnected, it will produce great voltage changes. The high voltage arc produced by the positive and negative poles in the short circuit is used to melt the solder on the electrode. Flaws such as cracks, holes and undercuts will reduce the defects.