creating an overlapping joint by welding at small points
Assembling thermoplastics without preformed holes or energy directors. This method is useful for large parts and sheets of extruded or cast thermoplastics.
spot welds may be circular, elliptical, rectangular, annular, etc. in geometry. They are formed when the material is clamped between the shaped tip and anvil and ultrasonic energy is applied.
Usually made on materials having some type of overlapping joint design. Can refer to resistance, MIG or TIG spot welding. Resistance spot welds are made from electrodes on both sides of the joint, while TIG and MIG spots are made from one side only.
A process for joining steel sheets. The two parts are held between electrodes and the heat generated at the interface between the sheets causes local welding when pressure is applied.
A method of joining two pieces of overlapping sheet metal together in which the welded region is limited to a 'spot' of approximately circular cross section. This localised weld is nominally made by a resistance welding technique but can also be made using an arc.
A method for lightly fastening two pieces of sheet metal. A machine presses the two pieces between small-diameter rods, between which an electric current is passed, the heat of which serves to melt and fuse the two pieces of sheet metal at that point.
Spot welding is a type of resistance welding used to weld various sheet metals. Typically the sheets are in the 0.5-3.0 mm thickness range. The process uses two shaped copper alloy electrodes to concentrate welding current and force between the materials to be welded.