Butt welders join pieces of metal together placed on the same plane. Operatives position metal end-to-end and then weld along a joint, ensuring that the weld remains within the planes of the original materials. In butt joints, materials do not overlap, differentiating them from lap joints.
Projection welding machines designed to weld together thick pieces of material
Resistance-based welding for exceptional fusion
Constant pressure and even-contact system for an exceptional finish
Products available from multiple manufacturers, including British Federal, CEA and Serra
Suitable for both smooth and embossed metal pieces
The preparation of butt welds depends on the thickness of the metal pieces. In some cases, operatives may need to prepare the material by creating grooves in a process called edge preparation – essential for thicker metals. Butt welding can be either automated or done by hand. Flash butt welding uses machinery to join multiple irregular pieces of metal together. Usually, irregularities in the material would cause metal pieces to break during the welding process. However, butt welders apply high voltage currents to each component to ensure proper fusion.
Resistance butt welding joins similar pieces of metal together by making a weld across an entire section. Machinery passes a current through the parts to be welded together and pushes material together under a preset force. Electrical resistance in the metal causes the temperature of the materials to rise. As it does, the force creates deformations in the joining surfaces of the materials, bringing them into close contact to make the weld.
Butt welding is suitable for a range of applications, including solid materials, rods, pipes, profiles and hollow sections.