Spot Welding Of Galvanized Steel Sheets

Spot welding of steel sheets in automotive series production.

Spot welding of galvanized steel sheets.

The present invention is directed to an improved method and apparatus for effecting spot welds between superimposed sheets of galvanized metal. An attempt has been made in this program to improve weld quality deterioration in the spot welding of galvanized steel sheets. In this study the susceptibility of hot dipped galvanized q p980 steel to lme cracking during resistance spot welding was systematically investigated by an orthogonal experiment. When mig welding galvanized steel the weld puddle is 2550 degrees f.

In accordance with the method one of the electrodes is comprised of a consumable tip component preferably a steel ball whereby predictable and repeatable welding conditions are effected at each welding cycle. Guideline welding conditions are available in standards such as bs1140 british standard specification for uncoated and coated low carbon steel sheet. Then px al and st al sheets were overlap welded to steel sheets to produce two layer al steel dissimilar joints with the aluminum alloy sheet on the top and the galvanized steel sheet at the bottom using ht jdl6x12 2 refilled friction stir spot welding machine with sleeve plunging process. Aluminum oxide powder is interposed at the interface between two.

Arc welding is a versatile method that uses alternating currents to create a high heat arc that melts your flux. Use an arc welder to weld galvanized steel. Electrode force is usually increased by 10 to 20 compared to the equivalent setting for uncoated steel of a given thickness otherwise a poorer process tolerance narrower welding range is likely. This study investigated the resistance spot welding rsw parameters for an uncoated mild steel sample and two hot dip galvanized steel samples with different zinc layer thicknesses.

Refill friction stir spot welding involves a 3 piece tool consisting of a clamping ring with rotating inner sleeve and pin components made of tool steel to join thin sheets. It should be obvious even to the causal observer that if you put 2550 degree liquid steel over a galvanized coating that boils at 1350 degrees f. That a great deal of spatter will occur. Spot welding of galvanized steel sheets however has been a problem from the beginning.

Spot welding of steel sheets. Spot welding galvanized steel causes very little spatter. A standard arc welder is undoubtedly the best way to weld galvanized steel. That is poor electrode life due to high welding current.

For some time now it has been high alloy and ultra high strength galvanized steel grades with yield strengths 1 000 n mm that have brought the subject of liquid metal embrittlement back into the limelight. Two rsw schemes were considered. During the welding.