Circumferential seam in various forms of automatic welding machine, it should be forming under the different parts of the shape and size, material thickness and welding require different welding power source.
 (1) submerged arc welding submerged arc welding is continuous wire feed welding wire electrode and filler metal. In the district, covering a layer of granular flux in the welding arc burning, the flux layer and the wire end and the local base metal melting, the formation of the weld. The effect of the arc heat, part of the flux melt into slag and metallurgical reactions with the liquid metal, slag floating on the surface of the molten pool, on the one hand, to protect the weld metal, to prevent air pollution, on the other hand can make the Copper Welding Electrodesand slow cooling.
(2) tungsten inert gas shielded arc welding is a non-melting inert gas shielded arc welding, electric arc between the use of tungsten and workpiece metal melting and the formation of the weld, the welding process, the tungsten does not melt, only play a electrodes. Sent by the welding torch nozzle argon and helium as a shielding gas, the other according to need filler metal (produced by our company have a professional wire feeder). Tungsten due to well control the heat input, so it is continuous welding of sheet metal and backing weld an excellent method, the welding current pulse in the form, so often used for the bottom of the welding of the pipeline in order to achieve the single-sided welding forming the purpose of double-sided, this method can be used almost all metal welding, especially for aluminum and magnesium can form a refractory oxide and these active metals like titanium and zirconium welding, the weld quality of this welding method, But compared with other arc welding, the welding speed is slower.
(3), plasma arc welding and plasma arc welding is a MIG arc welding, it is the use of compressed arc between the electrode and the workpiece is the implementation of the welding, the electrode is usually tungsten. Generation plasma arc plasma gas can be used argon, nitrogen, helium, or both the gas mixture. Inert tail gas through a nozzle protection, welding can choose whether or filler metal (wire feed) plasma arc welding, arc straight, energy density, which arc penetration ability. Plasma welding can produce a pinhole effect, within a certain range, most of the thickness of the metal can not open groove welding, and to ensure penetration and weld uniform. Therefore, plasma welding productivity, weld quality is good, but more complex plasma arc welding equipment, welding processes and parameters to control higher (I have their own core expertise in this regard), the very sheet less than 1mm welding easier for the micro-plasma welding.
(4) melting of arc welding of this welding method is the use of the burning arc between the wire and the workpiece continuous feeding heat from the welding torch nozzle gas shielded arc welding, MIG usually The gases are argon, helium, co2, oxygen or a mixture of these gases. The main advantage is referred to as MIG welding, argon and helium as a shielding gas, reactive gas (co2, oxygen) or reactive gases and inert gas mixture to protect the gas referred to as MAG welding MIG welding aspect to kinds of position welding, the welding speed, high deposition rate advantages.
(5) cored wire arc welding flux cored wire arc welding, burning arc between the wire and the workpiece continuous feeding heat welding, that is melting a kind of arc welding, so the use of wire flux cored wire, the wire core of different components of the powder, plus a protective gas welding, powder thermal decomposition or melting, plays made gas, slagging protection bath, alloying and arc stability role.
(6) Resistance welding is a resistance heat welding method for a kind of energy, including electroslag welding slag resistance heat energy to the solid resistance of the thermal energy resistance welding, solid resistance heat energy resistance welding, main tack welding, seam welding, Welding Consumables and butt welding. Resistance welding generally the role of the workpiece in a certain electrode pressure and the use of resistance heat generated by the current through the workpiece, the contact between the two workpiece surface melting and connected. Usually use a larger current, and always want to put pressure on in order to prevent the arc and the contact surface for forging the weld metal, welding process.
(7) In addition, the energy-speed welding, electron beam welding, laser welding, laser-arc hybrid welding, brazing, high frequency welding, gas welding, explosive welding, friction welding, ultrasonic welding, diffusion welding and so on.