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Flash butt welding is a type of electrical resistance welding used to join components in which the energy is transferred by the resistance heat created by the parts themselves. The components are positioned end to end throughout the whole joint region. A range of section sizes and sophisticated shapes can be combined ( examples are bicycle wheel rims and railway rails, see below). While a flashing voltage is applied, the connecting components are held and gently pushed together. Although the procedure can be performed by hand, the majority of welding machines are mechanical or semi-automatic. Dahching has a wide range of butt welding and flash butt welding machines for its customers. Read on to find out more about these two types of welding machines.

Spot Welding machines use a method called resistance spot welding to join overlapping metals between two electrodes using electrical resistance. Squeezing the workpieces between the electrodes applies pressure, and the passage of welding current through the resistive metals generates heat. This allows the materials to bind together and form a welding joint. Spot welding has its name as the current is applied precisely over a small area on the metal's surface. The resistance spot welding equipment can be in the form of stationary or bench-type welding machines, portable spot or robotic welding guns, and multi-head spot welding machines designed for different applications. Here at Dahching we have a wide range of spot welding machines and resistance welding equipment to choose from.