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Man Poo > Stamping-> Bulging (G) > Flashcards

Stamping-> Bulging (G) Flashcards

1
Q

STAMPING

A

varied processes that can be applied to sheet metal manipulation

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2
Q

ADVANTAGES of STAMPING

A

fast and energy efficient, preferred manufacturing method

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3
Q

PUNCHING

A

sheet metal is placed over a die and then the hole is generated by a descending punch. the sheet with the hole is retained.

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4
Q

a BLANK/ SLUG

A

the piece of material discarded after PUNCHING

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5
Q

BLANKING

A

the same process as PUNCHING, but the SLUG/BLANK is retained and the sheet is discarded

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6
Q

PLAIN or FLAT WASHERS

A

example of a product that is both PUNCHED and BLANKED.

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7
Q

Why are PUNCHING and BLANKING performed sequentially when making PLAIN or FLAT WASHERS?

A

so that the waste and product streams can be kept separate.

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8
Q

PERFORATING

A

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.

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9
Q

NOTCHING

A

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.

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10
Q

SEMINOTCHING

A

PUNCHING that becomes NOTCHES once the sheet is subsequently sheared.

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11
Q

NIBBLING

A

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

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12
Q

SLITTING

A

a process that can cut thin sheet metal without generating chips or shavings; employs ROTARY KNIVES and commonly used by can openers

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13
Q

LANCING

A

a sheet metal process that combines SLITTING with LOCAL BENDING; creates sheet metal features that are out-of-plane with the surface.

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14
Q

What are three examples of LANCING?

A

ANGLE LANCING (looks like an open flap)
BRIDGE LANCING (looks like a handle)
LOUVER LANCING (for ventilation)

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15
Q

PIERCING

A

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.

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16
Q

EDGE BENDING

A

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

17
Q

BRAKE/ BENDING BRAKE/ PRESS BRAKE

A

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

18
Q

SPRINGBACK

A

when permanently deformed, the metal will still flex back somewhat due to the elastic portion of the overall deflection as the forces are removed. the sheet metal must be OVER BENT to compensate for this.

19
Q

ROLL FORMING

A

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.

20
Q

How can you tell the difference between EXTRUDED STOCK and ROLL FORMED STOCK?

A

ROLL FORMED STOCK has a constant wall thickness everywhere and a join will be evident.

21
Q

What is one example of an application of ROLL FORMING?

A

CONTINUOUS (SEAMLESS) GUTTER for houses

22
Q

EDGE BENDS/FOLDS

A

can be added to the edges of sheet metal for the purpose of longitudinal stiffening and to hide a sharp edge

23
Q

Three main categories of EDGE BENDS/FOLDS

A

FLANGES
HEMS
BEAD or CURL

24
Q

FLANGES

A

longitudinally stiff, but not in the transverse direction.

25
Q

What is added to FLANGES to add stiffness?

A

GUSSET or DART

26
Q

BEADS and RIBS

A

stiffening options for flat areas (ribs - bed of a pickup truck)

27
Q

DEEP DRAWING

A

the primary process for making soda cans

28
Q

STRETCH FORMING

A

sheet metal is placed in tension and stretched over a properly shaped STRETCH BLOCK.

29
Q

DISADVANTAGE of STRETCH FORMING

A

leaves residual tensile stresses in the aluminum skin, which can cause cracks

30
Q

PEEN FORMING/ SHOT PEENING

A

the process that can reduce residual stresses, which keeps fatigue cracks closed.

31
Q

THIN WALLED TUBE

A

shares characteristics associated with sheet metal. it is basically sheet metal wrapped into a tube shape.

32
Q

BULGING

A

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.

33
Q

HYDROFORMED BULGING

A

pressurized fluid is used to expand the tube and form the BULGE

34
Q

EXPLOSION FORMED BULGING

A

expanding gas is used to expand the tube and form the BULGE

35
Q

BULGE MEDIUM

A

whatever is used to push the material into BULGE shape

Man Poo (31 decks)

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