metal working processes, tools, and machines (sheet and small section steel) eng. bob fairchild chab...
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![Page 1: Metal Working Processes, Tools, and Machines (sheet and small section steel) Eng. Bob Fairchild CHAB Stove Camp The Farm Sept 2012](https://reader036.vdocuments.site/reader036/viewer/2022062511/55182ade550346ac318b4dfd/html5/thumbnails/1.jpg)
Metal Working Processes, Tools,
and Machines(sheet and small section steel)
Eng. Bob FairchildCHAB Stove Camp
The Farm Sept 2012
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“Raw” Materials
• Plain steel sheet• Galvanized steel sheet – flat, corrugated, d-rib
• Stainless steel sheet• Plain steel rod, rebar, bar, angle• Slotted angle• Expanded metal• Hardware cloth• Steel pipe, conduit
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Why Steel?
• Cheap• Durable• Takes high temperatures• Not too difficult to work• Stainless - takes heat better but is harder and much
more expensive and less heat conductive
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“Processed” materials
• Stovepipe• Steel buckets• Steel drums/barrels• Stainless steel “Cornys”• Pots and bowls• Cast iron grates
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Measuring and Marking• Scale/ruler• Tape measure (length and diameter)• Square• Protractor• Scribe (w or w/o blacking and bluing)• Pens, pencils• Dividers/compass• Snap punch• Center punch• Sheet metal gauge
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Measuring tools
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Marking tools
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Making Holes
• “Church key” can opener• Twist drills (lousy in sheet metal)• Step drills (great in sheet metal) –small • Hole saws (bimetal and carbide teeth) - large• Hollow punches• Hand punches• Knockout punches• Foot lever punches
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Twist drills Step drills
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Hole saws
Bimetal Carbide
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Hollow punches Hand punches
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Knockout punches Foot lever punch
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Cutting• Hammer and chisel• Hand and power snips• Hand and power nibblers• hand notchers• Hand and foot lever notchers• Slotted angle shear• Angle shear, notcher• Circle cutter• Circle shear• Hand lever shear• Foot shear• Rotary can openers• Drum deheader• Angle grinder• Hand and power saws (hack, jig, circular, chop, …)
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Snips
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Nibblers
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Hand notchers
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Lever notchers
Hand lever notcher: 6”-152mm Foot lever notcher: 3 1/8”-80mm
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Slotted angle shear
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Circle cutter – electric drill powered
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Hand lever shears
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Shear machines
Foot shear Circle shear - manual
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Drum deheaders
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Grinding
• Stones• Files• Angle grinder (electric, pneumatic)• Grinding wheel (hand, foot, electric)
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Angle grinders
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Bending
• Pliers benders• Cleat bender• Sheet metal brake• Angle bender
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Pliers benders
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Bending machines
Cleat bender (1/2” (12.5mm) 180° fold)
Sheet metal brake (bender)
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Angle iron cutter, notcher, bender
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Rolling(making cylinders and rings)
• Hand rolling• Slip roller – sheet metal• Bead roller, edger, flanger• Ring roller – bar/angle/rod
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Manual rolling machines
Slip roll Bead roller Ring roller
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Joining
• Crimping• Bending (tab and slot)• Riveting• Screwing• Bolting• Spot welding• Welding
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Rivet gun
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Spot welder