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Bar and wire billetflash butt weldingIt is a process of welding adjacent billets together on a rolling production line to achieve continuous rolling of bars or wires. It has good welding quality, fast speed and high efficiency, can reduce the amount of scrap and reduce the loss of components. It is welded firmly and the properties of the welded parts are the same as those of the base material. Parameters can be set accurately and the flash evenly distributes temperature, thus improving product quality and uniformity.
1. Flash welding process Flash welding is a resistance welding process. The solid joint is composed of the base material without any filler metal. The billet is reliably clamped to the conductive electrode. On, flash welding is achieved through low voltage and high current.
2. Flash. Flash welding includes two main stages: flash and upsetting. After the billet passes through the heating furnace, no preheating is required. Flashing starts after the head and tail of the billet are aligned. The control system ensures that the flash evenly covers the end of the billet and avoids excessive flash. This ensures the welding quality and prevents voids and inclusions in the welding part. The flash continues for a preset time, and liquid metal and plastic rings are generated at the end of the billet, which is then upturned.
3. Upsetting Upsetting is performed immediately after the flash stage, that is, pressure is applied to the welding area to remove oxides, and weld burrs are formed around the welding area after welding. Weld burrs need to be removed to avoid surface defects during rolling.
4. Welding quality Proper flash welding is of very high quality and the properties of the welded joint are identical to those of the base material. In fact, subsequent heat treatment or machining will cause the solder joint to disappear. During flashing, typically 510~715 mm of metal is lost at each end of the billet, so the ends of the billet do not need to be processed before welding, and rough and oxidized surfaces can be welded well. Flashing and upsetting are important to remove all inclusions and other impurities from the surface of the billet. The final solder joint consists of a solid metal matrix at a certain distance from the original flash surface.
Wuxi Xinxing Welding Equipment Factory has been engaged in resistance welding for 29 years. Its core technology products include: semi-automatic butt welding machine, pneumatic-flash butt welding machine, multi-strand wire welding machine, foot spot welding machine, pneumatic spot welding machine, medium frequency spot welding machine, row welding machine, mesh welding machine,Resistance automatic welding machine, energy storage welding machine, copper rod and aluminum rod disc circular welding machine, auto parts spot welding machine, sheet metal spot welding machine, home appliance hardware spot welding machine, small electrical appliance spot welding machine, copper row copper pipe welding machine, nut spot welding machine, stainless steel welding machine, foil strip spot welding machine, aluminum spot welding machine, multi-head spot welding machine, bag There are more than 300 types of cage spot welding machines, mesh welding machines, ton rack welding production lines, resistance automatic welding machines, brazing machines, diffusion welding machines, projection welding machines, seam welding machines, wire and cable optical cable supporting equipment, etc. If you are interested in our welding equipment, please contact us.