How To Spot Weld Aluminum Sheet

Use 1 hand to hold the metal so you can use the other to press down the handle.

How to spot weld aluminum sheet.

Aluminium oxide which forms naturally on the aluminium surface has a very high electrical resistance. Spot welding is usually used to join a panel of overlapping sheet metal parts that are usually 3mm thick. Thus spot welding diameters go from 3mm to 12 5mm. Protect yourself and others from flying sparks and hot metal.

This instructable will teach you how to use a propane torch and some aluminum brazing rods as a quick way to bond aluminum without using a welder. Spot welding machines typically deliver 150 amps per phase draw on a 440 volt system. In a typical spot welding application there are two electrodes opposite each other which squeeze the metal pieces together. Insert the metal between the 2 electrode tongs.

Welding aluminum is not as hard as you think. Hold the handle of the vice grip pliers and move the metal between the 2 tongs. This is because the strength of the joints depends on the number and size of the weld. It makes for a very strong bond and with a little practice can be done quickly with great looking results.

Do not spot weld where flying sparks can strike flammable material. The harder alloys are generally more easy to weld conversely pure aluminium is not recommended for spot welding. The ration of thickness should not exceed 3 1mm. Links to the tools and materials leah uses in this video.

Use three phase electrical energy to spot weld aluminum. This type of electrical power is wanted for the big output current that spot welding requires. This squeezing pressure is controlled. Spot welding typically brings current for 0 1 seconds or less so the current must be very high.

A beginner s guide to welding brazing aluminum with alumiweld rods. Keep the metal still as you ready the tongs to spot weld and fuse them together. Remove all flammables within 35 ft 10 7 m of the weld. Spot welds are formed when a large amount of current is passed through the panels for the correct amount of time and with the correct amount of pressure.

If this is not possible tightly cover them with approved covers.