I would like to buy a flash butt welding machine, I would like to understand the principle of welding machine to see if it can meet the requirements of welding. I welded the cross section of the pipe cross section, requiring the sealing 15KG pressure of the bead
It may not be suitable for you, because the thickness of your work is not enough, and it needs a lot of pressure after the melt
The working principle of flash butt welding machine: butt welding of the workpiece, the gas control, first slowly push the workpiece welding oxidation and bumps flash surface after removing hot workpiece face welding plastics, then quickly add a forging force to two penetration welding welding end.A microcomputer controller is used to control the clamping, flashing, upsetting, holding, stopping and the whole welding process, and the control accuracy is high.The product of high welding strength, good compactness, no weld, no slag, firm and beautiful.Widely used in carbon steel, alloy steel, nonferrous metal pipes, bars, plates, profiles between the butt welding or dissimilar metal butt welding.
Principle:In this stage, the power supply is first connected and the two workpiece face is slightly contacted, so that a lot of contact points are formed. When the current through the contact point, melting into liquid metal connected to the two end of the lintel. Due to high current density of liquid in the liquid metal lintel, evaporation, blasting in the lintel lintel. With the moving clamp slowly advancing, lintel has been produced and blasting. Liquid metal particles are ejected continuously from the interface under the influence of vapor pressure and electromagnetic force. Spark of sparks - flash.In the flash process, the workpiece is gradually shortened, and the end temperature is gradually increased. With the increase of temperature at the end of the lintel blasting will accelerate the speed and propulsive speed clamp must also increase gradually. Before the end of the flash process, the entire end of the workpiece must be made of a liquid metal layer, and at a certain depth, the metal reaches the plastic deformation temperature.In the flash stage at the end of the top exert enough pressure on the workpiece immediately, the interface gap decreases rapidly to stop blasting into the lintel, upsetting stage. Upsetting is the role of the seal clearance and left end surface of the liquid metal lintel after blasting crater, liquid metal and oxide inclusions and extrusion surface, the plastic metal clean close contact, and the joint area of plastic deformation, in order to promote the recrystallization in grain, forming a common and strong the joint.
