The purpose of the electric welding machine is to use the high-temperature arc generated when the positive and negative poles are short-circuited instantaneously to melt the solder on the electrode and the material to be welded, so that the objects to be contacted are combined. Its structure is very simple, it is a high-power transformer. Welders have a wide range of uses. Whether it is a large shipbuilding enterprise, industrial and mining enterprises and various construction enterprises, electric welding machine is an indispensable tool. So do you know how much the power of the welding machine is generally? How to calculate the power of electric welding machine? Below I will take you to find out.
Principle of electric welding machine
Electric welding machine uses the high temperature arc generated when the positive and negative poles are short-circuited instantaneously to melt the solder on the electrode and the material to be welded to achieve the purpose of combining them.
The structure of the electric welding machine is very simple. To put it bluntly, it is a high-power transformer that converts 220/380V AC into a low-voltage, high-current power supply, which can be either DC or AC.
Welding transformers have their own characteristics, that is, they have the characteristics of a sharp drop in voltage. After the electrode is ignited, the voltage drops. In the adjustment of the working voltage of the electric welding machine, in addition to the one-time 220/380V voltage conversion, the secondary coil also has a tap conversion voltage, and it is also adjusted by the iron core. The adjustable iron core electric welding machine is generally It is a high-power transformer, which is made of the principle of inductance. The inductance will produce a huge voltage change when it is turned on and off. It uses the high-voltage arc generated when the positive and negative poles are short-circuited to melt the electrode on the electrode. Solder. To achieve the purpose of making them together. A voltage is applied between the electrode and the workpiece, the arc is ignited by scratching or contacting, and the energy of the arc is used to melt the electrode and heat the base metal.
How many watts is the power of the electric welding machine
The power of the ordinary electric welding machine is 2000w-3000w, and the power of the special electric welding machine is even higher.
The purpose of electric welding machine is to use the high-temperature arc generated when the positive and negative poles are short-circuited instantaneously to melt the solder on the electrode and the material to be welded, so as to combine the objects to be contacted. Its structure is very simple, it is a high-power transformer.
Welding machines are generally divided into two types according to the type of output power, one is AC power and the other is DC. They use the principle of inductance, the inductance will produce huge voltage changes when it is turned on and off, and use the high-voltage arc generated when the positive and negative poles are short-circuited to melt the solder on the electrode, so that they can achieve the purpose of atomic bonding .
General electrical equipment requires that the voltage of the power supply does not change with the change of the load, and its voltage is constant, such as 380V (single-phase) or 220V. I remind that although the voltage connected to the welding transformer is certain, such as 380V or 220V, the output voltage after passing through this transformer can change with the output current (load), and the voltage decreases rapidly with the increase of the load. , which is called the steep drop characteristic or the drop characteristic.
Industrial and mining welding machine: AC arc welding machine, DC electric welding machine, argon arc welding machine, carbon dioxide shielded welding machine, butt welding machine, spot welding machine, submerged arc welding machine, high frequency welding machine, flash butt welding machine, pressure welding machine, butt welding machine laser welding machine. DC welding machine: ①The rectifier element is installed on the basis of the AC motor, mainly welding steel plates; ②The DC generator is mainly welded with non-ferrous metals and pig iron. TIG welding machine: It can mainly weld thin plates and non-ferrous gold layers below 2MM. Carbon dioxide shielded welding machine: It can mainly weld thin plates and non-ferrous gold layers below 2MM. High Frequency Welding Machine: Welding steel pipes in major pipe factories. Flash Butt Welding Machine: Mainly for butt joints such as copper and aluminum joints. Submerged arc welding: It mainly welds thick steel structure materials such as steel structural parts, bridge H steel, and I-shaped room girders. Gas shielded welding machine: argon arc welding, carbon dioxide shielded welding, under the protection of gas, the welding machine will not be oxidized, the welding will be firm, and the non-ferrous gold layer and thin materials can be welded. Laser Welder: Can weld the leads inside the transistor. Butt welding machine: The cable and chain factory mainly welds iron cables and other objects on anchors. It can be connected to Yuan steel, etc. Which is the best electric welding machine 1 DC electric welding machine
The DC electric welding machine is generally divided into two types: thyristor rectifier and inverter. It can be said to be a high-power rectifier, which can provide stable arc and stable melting. Drop transition.
Advantages and disadvantages: Compared with AC electric welding machine of the same specification, its volume is small, which saves electricity; The items are beautiful and the spatter is low; the current adjustment is very convenient, and the impact on the power grid is small. But I think the fly in the ointment is that its craft performance is poor, the price is high, and the durability is poor.
Use:The DC welding machine is mainly used in the manufacture of pressure vessel boilers, pipes, or welding machines for important structural manufacturing units.
2 Inverter welding machine
The inverter electric welding machine is an electric welding machine which adopts the principle of inverter technology. Its current conversion process is: power frequency AC-DC-high frequency AC-transformation-DC.
Advantages and disadvantages: The inverter welding machine is small in size and light in weight; it can save a lot of metal materials in the manufacture of welding and cutting equipment, and also has the advantages of energy saving, high efficiency, The advantages of flexible control, stable output voltage and current. The disadvantage is that the structure is complex, involving many electronic components, and it is difficult to debug, detect and set parameters.
Usage: Widely used, inverter DC manual arc welding machine is mainly used for welding various metals such as low carbon steel, medium carbon steel and alloy steel.
3 AC Welding Machine
AC Welding Machine is a special step-down transformer that converts 220V and 380V AC into low-voltage DC. It is a welding machine whose output power is AC power.
Advantages and Disadvantages: AC welding machines are relatively inexpensive and generally less prone to failure. However, its size is generally large and heavy, so it is not convenient to move; it consumes more energy and saves electricity, and generally can only weld acid electrodes, such as 422, etc.; the current adjustment is inconvenient, and the operation is more laborious; single Phase power supply, easy to affect the work of other equipment.
Use:AC welding machines are generally used in steel structure manufacturing units or general general machinery or agricultural machinery manufacturing units.
