Built a 6" x 14" shelf to store two medium sized oil cans. I used 16 gauge and broke four sides. The rear lip (mounting lip) was kept at 1-1/4" while the rest of the shelf has a .750" lip. The rounded corners required two strips to be formed and welded. The shelf will be mounted to a lathe stand just below the tail stock. Also beefed up some angle brackets with gussets (left over from different job) that will be used for castors on smaller mill.
Laid-out the scrap sheet for cutting and breaking. Used those inexpensive HF hand shear for cutting sheet and rounded corners.
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The 8' apron brake used is a WW II era break, heavy as hell and american made. Breaking sequence is critical as this is a fingerless brake. On this particular job, if I was to break the sides first, then the back brake would not be possible as the sides would conflict at 60-70º. The back (1-1/4" lip) was done first, then the sides. The ends of the brake where used to bend the right side and left side. The front lip doesn't care as the corner radius had no lips.
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A 3/4" strip was sheared and kept long (enough for both corners) for forming the corners.
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Corners where formed and tacked from the top and welded from the bottom, then around smooth for a one piece look. Remember to smooth out all edges prior to breaking, eliminating the sharp edge a shear leaves behind.
The gussets where uneventful but I should note angle brakets where galvanized coated under the painted surface. Any hot work done on galvanized should be cleaned off. Grinding,sanding etc should be done in a well ventilated area.
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Turned out nice and should work well for intended use. Even the simplest jobs take some time to complete.
Stay cool.
Paco