Equipments for Butt Welding - A butt welder consists of a couple of damps suitably mounted on a horizontal slide, one being fixed rigidly and the other movable. Both clamps are made of conducting material (Cu-alloy) and are connected to the secondary of a transformer.
A stepdown transformer provides the electrical current for heating. Control of secondary current is achieved by transformer tap switches or electronic phaseshift devices.
Each buttwelding machine has an activating device to start the welding process, such as a foot pedal or clamp release lever. Pressure for butt welding is obtained by mechanical spring, pneumatic or hydraulic systems.
