Lay out the panels for your box on the sheet metal using the measuring tape and the permanent marker.
How to make a lid out of sheet metal.
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With the marker mark off a line 1 2 away from each short edge and one line 1 2 away from one long edge.
I ve been modelling up a sheet metal assembly and am rather inexperienced with inventor.
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Step 2 use the cutting torch to cut out each panel and then grind the edges smooth with the hand held grinder.
It is easier to cut off a 4 x 12 strip if you have a 12 x 12 sheet first then cut two 3 1 2 pieces from that strip.
So mark out two 4 x 3 1 2 sections of sheet metal and cut it in the metal shear.
Lay the bottom on the ground and weld the two ends on first.
Remove your now folded metal from the bar folder and place it back on the fold table with the fold facing up.
Pull your handle to fold your metal over 180 degrees.
These are your bend lines.
In response to a question about h.
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Repeat steps 1 4 for all other hems.
Kwando technic introduce how to homemade a metal pressing tool.