The spot weld is made by overlapping the parts and gripping the overlapping sections between two electrode points, through which the current is passed for localised heating. After the current is switched-off, the molten metal solidifies, leaving a welded spot (Figs. 24.1 and 24.2).

What are the applications of spot welding?

Spot welding is typically used when welding particular types of sheet metal, welded wire mesh or wire mesh. Thicker stock is more difficult to spot weld because the heat flows into the surrounding metal more easily. Spot welding can be easily identified on many sheet metal goods, such as metal buckets.

Why is it called spot welding?

There are nearly dozen different types of welding processes, one of which is spot welding. It’s called “spot welding” because it focuses the heat on a small and precise area of the workpieces to be joined.

What is the main limitation of a spot welding?

Only thin metals can be welded accurately and efficiently. Installment cost is more. This type of welding gets deformed.

How to spot weld?

Put on a pair of welding gloves and goggles. Spot welding creates bright light and lots of heat,but there aren’t any sparks,so you don’t need to wear

  • Make sure the welder is plugged in and turn on the machine. When you’re ready to weld,double-check that the machine is plugged into a wall outlet nearby.
  • Insert the metal between the 2 electrode tongs. Hold the handle of the vice grip pliers and move the metal between the 2 tongs.
  • Press down on the handle to close the tongs. Squeeze the handle on the machine to close the tongs.
  • Hold the handle down for 3-5 seconds to fuse the metal together.
  • Remove the metal and allow it to cool for 5 minutes.
  • Unclamp the metal and reposition the pliers to weld additional spots.

    • What is spot weld?

    [spot-weld] verb (used with object) to weld (two pieces of metal) together in a small area or spot by the application of heat and pressure.

    How does spot welding work?

    Spot welding works by sending an electrical current through two metal surfaces and thereby welding the surfaces together at that spot, hence the name.

    What is spot welder?

    A spot welder is a device that uses an electrical current to fuse two pieces of metal together. These typically operate by using a transformer and a large capacitor to build up a large electrical charge.