Key Features:

• Resistance Heating: The heat is generated at the joint by passing a large electrical current through the metal surfaces at the contact points.
• Flashing and Upsetting: The edges are heated very fast and partially melted (flashed), then the melted edges are forged against each other under pressure (upsetting), which unites the metals.
• Continuous and Automated Processing: Flash welding is employed where automation can be applied, making it a speedy and consistent workstation for welding rods, rails, and frames.

Flash welding is indispensable in the manufacture of components requiring strong, continuous welds without any filler material. The process finds its application in welding railway tracks, automotive parts, and structural frames, where it provides efficiency and strength. The whole technique provides high-integrity joints from minimal operator involvement, making it amenable for industrial automation and mass production.