Spot Welding Aluminum Thickness

Where aluminium is used instead of steel its gauge is normally increased giving weld strengths which compare more favourably with those of steel but.

Spot welding aluminum thickness. Thus a spot weld made in two sheets each 1 mm in thickness would generate a nugget 5 mm in diameter according to the 5 t rule. One general criterion of resistance spot welding is that the weld shall have a nugget diameter of 5 t 1 2 t being the thickness of the steel sheet. Spot welding aluminum to steel aluminum to steel. Spot welding is a procedure in which two metal surfaces are melted jointly to form a weld.

The two electrodes focus the current onto a small spot which is where the term spot welding comes from. Resistance spot welding is the joining of overlapping pieces of metal by applying pressure and electrical current. Vehicle manufacturers use resistance spot welding in the factory. It requires 2024 t3 aluminum lap joint to be spot welded.

Aluminum spot welding is becoming more common as. A couple of electrodes at the same time clamps the work pieces jointly and delivers the electrical current wanted to make the weld. Protect yourself and others from flying sparks and hot metal. Using thin scrap steel sheet between the electrodes and the aluminium also works well.

If this is not possible tightly cover them with approved covers. Of weld time material thickness effect related to. The challenges to spot welding of aluminum compared to steel include a tenacious and rapidly forming oxide layer of variable thickness and composition high electrical and thermal conductivities small increases in resistivity with temperature a narrow plastic range low melting temperatures and a high coefficient of thermal expansion. Aluminum could be conducting heat away to fast to make good spot weld.

Diameter of the electrode contact surface should be. Microsoft powerpoint advances in the resistance spot welding of aluminum compatibility mode. Be alert that welding sparks can easily go through small cracks and openings to adjacent areas. These joints created by resistance spot welding form a button or fused nugget resistance spot welds are found typically on flanges staggered in a single row of consecutive welds.

The sheet metal parts are 032 each for a total thickness 065 with a spot weld diameter of 125. These parts were originally spot welded together and new wing skins will be fabricated that require thousands of these spot welds. 06 14 2012 09 05 pm 11. Remove all flammables within 35 ft 10 7 m of the weld.