Grinding down a weld on a formed workpiece is and probably will remain an intensely manual operation.
Grinding down welds on sheet metal.
But the devil s in the details.
Hold the grinding disc as level as you can to the piece of metal.
To achieve this initial stock removal and if the surface finish is not essential the metal worker might choose to use a simple grinding wheel with an angle grinder.
Using a grinding wheel on a weld.
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Overhead work where the weight of the grinder is important.
At every process upstream most precision sheet metal fabricators employ at least some level of automation.
The aim here is to grind the joint down to a level and continuous surface with the rest of the parent metal.
This is a slightly worn they come with straight edges 40 grit flap disc.
The last step is to grind down the weld with a 3m reinforced weld grinding wheel.
Welds tend to have dips up and down so holding the grinder at an angle could cause it to gouge into the metal.
High where overgrinding is a concern such as thin walled sheet metal.
Removing weld splatter without overgrinding 50 grit or finer.
Grind it almost flush maybe leaving a very slight crown.
You must avoid touching the panels with the grinder as they can get too thin really fast using this tool.
But there s no getting around it.
The act of grinding can be deceivingly simple.
Better surface finish than a grinding wheel or fiber disc grit for grit.