Griding A Weld On Sheet Metal

Removing weld splatter without overgrinding 50 grit or finer.

Griding a weld on sheet metal.

For weld clean up on sheet metal there are much better tools available. K36 k120 pre grinding second step. Say if you are welding an 18 gauge stainless steel sheet that is 2 2 feet in size to repair the side of your tank start by creating a weld that is 1inch long then skip 6 inches and then create a 1 inch long weld. In this demo see the 2 step weld removal and paint prep process using a 3m cubitron ii flap disc 969f and a scotch brite light grinding and blending disc.

Continue the same way along the sides of the piece of sheet metal. The act of grinding can be deceivingly simple. Kfs 125 ce ii va. At every process upstream most precision sheet metal fabricators employ at least some level of automation.

Another issue with grinding wheels is that they are fragile. A100 a30 fine grinding third ste. Hold the grinding disc as level as you can to the piece of metal. Keep your grinding disc nearly parallel to the metal so the grinder smoothes out the edges of your weld even to the sheet metal.

The aim here is to grind the joint down to a level and continuous surface with the rest of the parent metal. As a rule when mig welding sheet metal never use a body filler metal that is thicker than the base metal. The removal of excess stock from the weld itself. These are essentially layered squares of sandpaper bonded onto a plastic or composite disc.

Welds tend to have dips up and down so holding the grinder at an angle could cause it to gouge into the metal. Made of compressed composites if they get in a bind or crack from heat they can shatter sending brutal shrapnel all over the place including your face. Better surface finish than a grinding wheel or fiber disc grit for grit. Grinding down a weld on a formed workpiece is and probably will remain an intensely manual operation.

High where overgrinding is a concern such as thin walled sheet metal. The best tool for weld finishing is the flap disc. It is recommended that a welder should use 023 or 024 inch wire for light gauge sheet metal work. Initial weld grinding the first stage of weld finishing is the same.

Overhead work where the weight of the grinder is important.