1 ---- stamping, punching, blanking

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24 Terms

1
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when can the plate/sheet be turned into a product

once it has been rolled an extruded and sheared into a manageable length

2
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stamping is the process

the varied processes that can be applied to sheet metal manipulation

3
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some sheet metal products still? example ?

retain their original sheet appearance

metal roofing

4
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the vast majority of stamped products becomes

discrete components with few remaining obvious flat area

5
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example of products that become discrete components ? for this object?

hurricane - aka oil or kerosine lamp

the products doesn’t appear sheet-like because of its curvy and compact dimensions

6
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sheet can be used thin because? the resulting product has

the folded nature of the design creates stiffness

high strength, because of the wrought aligned grains created during rolling

7
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the product is strong but also

light weight and very inexpensive

8
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stamping is very ? often considered first as a preferred manufacturing method

fast and energy efficient

stamping, although not suitable in all cases

9
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punching is possible, assuming

that a product is to start as a piece of sheet metal, cut from a longer length via shearing

10
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punching? is done by ?

where a hole (of any shape) is created in the sheet

the sheet is placed over a die and then a hole is generated by a descending punch

11
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this process produces no

no fine metal chips or shaving, but rather a disc of metal called a blank (or slug)

12
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the name of the process depends on

which part of the sheet metal is to be retained and which goes to waste

13
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called punching if

the sheet with the hole is to be retained

14
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called blanking

if the slug is retained and the sheet discarded

15
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example of product that is both

plain or flat washer is both punched and blanked

16
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for a washer the processes are performed ? the creation steps are ?

sequentially, the waste and product streams can be kept separated

first - small punch pushed out a waste slug from the sheet - creating a central hole in the washer

second - second punch blanks out a concentric circle around the hole

the blank piece falls away as the final product, leaving the sheet as the waste

17
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perforating is? an example?

whe the punhcing is performed multiple times in a close proximity over a given area of sheet metal

to provide ventilation through a metal enclosure or to lighten a product or for decoration

18
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perforaitng can involve

any size, shape or combination of holes, and doesn’t have to follow an ordered geometric pattern, although it often does

19
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notching? can be associated with ?

another process for putting a hole (of any shape) through sheet metal - but it ALWAYS intersects the side of the sheet

bending operations where they provide corner relief

20
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notches can be incorporated into a

blanking operation, but this can make the punch complex and result in dishing of the blank due to the uneven peripheral forces involved

21
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seminotching

punching that becomes a notch(es) once a sheet is subsequently sheared

22
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nibbling is the process? but it isnt a ?

related process that uses successive notches to cut out areas of sheet metal

a production process, but is performed in workshops or in the field during installation of ducting

23
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results of nibbling

not attractive but its easier to do then to hand sew sheet metal - especially if the sheet metal is thin ad flimsy

24
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a vertical bandsaw may be used ? an issue with it?

to do a cleaner job, but only if the metal is still a still a flat sheet and can be brought to the saw

the noise pollution