Welding machine

Overview electric welding machine (electric welding machine) is actually a transformer with a decline in external characteristics, the 220V and 380V AC into a low voltage DC, welding machine generally according to the type of output power can be divided into two types, one is the AC power; Kind of direct current. The DC welding machine can also be said to be a high-power rectifier, which is divided into positive and negative poles. When the AC power is input, it is transformed by a transformer and then rectified by a rectifier, and then the power is output with a falling external characteristic, and the output is turned on and off. When a huge voltage change occurs, the two poles ignite an arc in an instant short circuit, and the resulting arc is used to melt the welding electrode and the welding consumables, and cooling is followed by the purpose of combining them. The welding transformer has its own characteristics. The external characteristic is the characteristic that the voltage drops sharply after ignition of the welding rod.

Welding is flexible, simple, convenient, firm and reliable. After welding, even the strength of the same strength as the parent material is widely used in various industrial fields, such as aerospace, shipbuilding, automobiles, and containers.

Features: 1. Advantages of welding machine: The electric welding machine uses electric energy to instantly convert electric energy into heat energy. Electric power is very common. The electric welding machine is suitable for working in a dry environment and does not require too much requirements. Because of its compact size, simple operation, and easy use, The advantages of fast speed, strong welding seam after welding, etc. are widely used in various fields, especially for parts requiring high strength, and can instantly use the same kind of metal material (but also can connect dissimilar metals, but the welding method is different). The permanent connection, after heat treatment of the weld seam, has the same strength as the parent material and seals well, which solves the problems of sealing and strength for the manufacture of stored gas and liquid containers.

Second, the disadvantages of welding machine: welding machine in the process of using around the welder will produce a certain magnetic field, the arc will generate radiation around the combustion, arc in the infrared, ultraviolet light and other light species, as well as metal vapor and smoke and other harmful Substances, so must do enough protective measures when operating. Welding is not suitable for the welding of high carbon steels. Due to the process of crystallization and segregation and oxidation of welding weld metal, welding performance is poor for high carbon steels, and cracks are easily generated after welding, resulting in hot cracks and cold cracks. Low-carbon steel has good welding performance, but it must be handled properly in the process. The cleaning of rust removal is cumbersome. Sometimes weld seams will have defects such as slag cracking and void indentation, but the operation will reduce the occurrence of defects.

The principle is to use the high-temperature arc generated by the positive and negative poles in an instant short circuit to melt the solder and the soldered material on the electrode to achieve the purpose of combining them. The structure of the welding machine is very simple. To put it plainly, it is a high-power transformer that converts 220V AC power to low voltage. The high-current power supply can be either DC or AC. Welding transformer has its own characteristics, that is, has a sharp drop in voltage characteristics. The voltage drops after the electrode has ignited. . . The welding machine's working voltage adjustment, in addition to a 220 / 380 voltage conversion, the secondary coil tap change voltage, there is also used to adjust the core, adjustable iron core. . . Electric welding machine is generally a high-power transformer, which is made by using the principle of inductance. The inductance will generate a huge voltage change when it is turned on and off. The high voltage arc generated by the positive and negative poles in an instant short circuit is used to melt the welding. Solder on strips. To achieve the purpose of combining them. A voltage is applied between the welding rod and the workpiece, and the arc is used to melt the electrode and heat the base metal by scratching or touching the arc.

Type 1, welder used by industrial and mining enterprises mainly by: AC arc welding machine, DC welding machine, argon arc welding machine, carbon dioxide protection welding machine, butt welding machine, spot welding machine, submerged arc welding machine, high frequency welding machine, The difference between flash butt welder, pressure welder, butt welder laser welder, AC welder and DC welder is mainly that the AC welder is generally used in a steel structure manufacturing unit or a general mechanical or agricultural machinery manufacturing unit. DC is mainly used in the manufacture of pressure vessel boilers, pipelines, or welding machines for important structural manufacturing units.

(1) The main application areas of inverter welding machines are the same, but the welding machine is more energy-efficient and lighter.

(2) Main application areas of submerged arc welding machines Large-scale steel structure manufacturing units, pressure vessel boiler manufacturing units.

(3) Main application fields of gas shielded welding machines Large-scale steel structure manufacturing units or general-purpose mechanical agricultural machinery, automobile manufacturing plants, security door processing plants, and units manufacturing pressure vessel boilers are now also widely used in gas shielded welding machines.

(4) Argon arc welding machine is mainly used in pipelines, pressure vessel boilers, stainless steel processing enterprises,

(5) AC argon arc welding machines are mainly made of aluminum welding manufacturing units and aluminum container manufacturing units. Aluminum radiator welding.

2. There are two kinds of DC welding machines: one is the installation of rectifier primary elements under the foundation of AC motors, and the other is a DC generator. DC welding machines mainly weld non-ferrous metals and pig iron. AC welding machine is mainly welded steel plate.

3, argon arc welding machine, carbon dioxide protection welding machine, high frequency welding machine, flash butt welding machine. The argon arc welding machine and the carbon dioxide protection welding machine can mainly weld thin sheets and colored gold layers below 2 mm. Flash butt welding machine mainly butt joints and other objects such as copper and aluminum, high frequency at the main welding plant welded pipe.

4, submerged arc welding of the main steel structure, bridge H steel, I-beam beams and other thick steel structure materials.

5, gas shielded welding: argon arc welding, carbon dioxide protection welding, under the protection of the gas under the welder will not be oxidized, dissolved firmly, can be welded colored gold layer, can be welded thin material.

6, laser welding machine: Solderable transistor internal leads.

7. Butt welding machine: The cable factory mainly welds the iron wire and other objects on the anchor. Can be connected to the Yuan Steel.

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