When welding wires together, whether to complete a loop or to introduce a wire “T”ed in to a frame, this is usually carried out by resistance welding process. The general sequence is as follows:-

• The pieces are clamped firmly in the machine so that components are in the correct position.
• The machine controller then pushes the components together, usually using pneumatic rams
• A high current is then passed through the electrodes – causing the material to melt and fuse together
• The part is then held for a fraction of a second to allow it to cool and solidify
• Finally the force between the components is released and the clamps retract.