Article
Resistance welding includes spot welding,Butt welding, projection welding, and seam welding, which belong to the category of pressure welding, have occupied an important position in welding science and technology in recent years. They are widely used in vehicles, construction, pipelines, hardware, sheet metal, aviation, aerospace, energy, electronics, and light industry and other sectors.
They account for 2/3 of the world's total welding volume. At present, resistance spot welding is widely used in the welding of low carbon steel, stainless steel, aluminum alloy, copper alloy, high temperature alloy, etc. below 5mm.
The principle of resistance spot welding is to apply and maintain a certain pressure on the workpiece to be welded through the spot welding electrode to make stable contact between the workpieces, and then energize the workpiece to pass the current through the workpiece and their contact surfaces. Resistive heat is generated inside the workpiece, and the contact points are locally melted to form solder joints.
Resistance spot welding has the characteristics of low energy consumption, low cost, high quality, high efficiency, easy automation, and easy use. It has no consumables, no need for electrodes, wires, flux, etc., the welding process consumes little heat, no smoke and other harmful substances, no dazzling light pollution, and the working voltage is only a few volts. It is a safe, economical, efficient, reliable, pollution-free and environmentally friendly welding method.
Key points for spot welding of three-layer boards
1. Just like the 2-layer board, the thin board can be welded with an AC resistance spot welder, and the thick board can be welded with an intermediate frequency spot welder. 2. Low carbon steel and stainless steel use chromium-zirconium copper electrodes. For aluminum alloys, the best choices are nickel-plated copper electrodes or alumina electrodes. For copper alloys, tungsten electrodes or molybdenum electrodes are used. 3. The welding machine is equipped with a water chiller to pass water for heat dissipation. 4. Use hard specifications, that is, welding with high current and short time 5. Using three-pulse current has better welding quality than single-pulse current.
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.