G- STAMPING Flashcards
varied processes that can be applied to sheet metal manipulation
STAMPING
sheet metal is placed over a die and then the hole is generated by a descending punch. the sheet with the hole is retained.
PUNCHING
the piece of material discarded after PUNCHING
BLANK/SLUG
the same process as PUNCHING, but the SLUG/BLANK is retained and the sheet is discarded
BLANKING
example of a product that is both PUNCHED and BLANKED.
PLAIN or FLAT WASHERS
when punching is performed multiple times in close proximity over a given area of sheet metal. can involve any size, shape, or combination of holes.
PERFORATING
Another process for putting a hole of any shape through sheet metal, but it ALWAYS intersects the side of the sheet. often associated with bending operations.
NOTCHING
PUNCHING that becomes NOTCHES once the sheet is subsequently sheared.
SEMINOTCHING
process that uses subsequent notches to cut out areas of sheet metal (looks like caterpillar bites out of a leaf) mostly performed in workshops or in the field
NIBBLING
a process that can cut thin sheet metal without generating chips or shavings; employs ROTARY KNIVES and commonly used by can openers
SLITTING
a sheet metal process that combines SLITTING with LOCAL BENDING; creates sheet metal features that are out-of-plane with the surface.
LANCING
creates sheet metal features that are out-of-plane with the surface, uses a pointed punch, and results in a FLANGED HOLE and NO SLUG.
PIERCING
the sheet metal is between a PRESSURE PAD and a BASE DIE. a WIPING DIE with a rounded corner descends at a specified clearance onto the sheet metal to bend it
EDGE BENDING
when permanently deformed, the metal will still flex back somewhat due to the elastic portion of the overall deflection as the forces are removed.
SPRINGBACK
LANCING for ventilation
LOUVER LANCING
LANCING configurations used as ways to attach sheet metal pieces together
ANGLE LANCING and BRIDGE LANCING
BENDING or SHEARING can be done on this machine. the WIPING DIE with a sharp corner descends to bend the material into a v-shape
BRAKE/ BENDING BRAKE/ PRESS BRAKE
process for bending very long lengths of sheet metal; uses a series of rollers to fold the metal strip in a series of progressive stages.
ROLL FORMING CONTINUOUS SEAMLESS GUTTER
What is one example of an application of ROLL FORMING?
CONTINUOUS (SEAMLESS) GUTTER for houses
can be added to the edges of sheet metal for the purpose of longitudinal stiffening and to hide a sharp edge
EDGE BENDS/FOLDS
Three main categories of EDGE BENDS/FOLDS
FLANGES
HEMS
BEAD or CURL
Three main categories of EDGE BENDS/FOLDS
FLANGES (longitudinally stiff, but not in the transverse direction.)
HEMS
BEAD or CURL
stiffening options for flat areas (ribs - bed of a pickup truck)
BEADS and RIBS
the primary process for making soda cans
DEEP DRAWING
sheet metal is placed in tension and stretched over a properly shaped STRETCH BLOCK.
STRETCH FORMING
the process that can reduce residual stresses, which keeps fatigue cracks closed.
PEEN FORMING/ SHOT PEENING
the process necessary to increase the diameter of a tube locally along its length. the THIN-WALLED TUBE is placed inside a split die with an internal cavity such that the walls are unsupported where you want the BULGE to be.
BULGING
pressurized fluid is used to expand the tube and form the BULGE
HYDROFORMED BULGING
expanding gas is used to expand the tube and form the BULGE
EXPLOSION FORMED BULGING
whatever is used to push the material into BULGE shape
BULGE MEDIUM
