dmh stamping fundamentals bn

8/2/2019 Dmh Stamping Fundamentals Bn

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Oscar Olvera

} Is manufacturing processthat cuts and form s sheetmetal int o a desired shapeor profile, without m aterialremoval.

} The stamping pressprovides the power totransform t he material

} The stamping d ies give thedesired shape or prof ile.

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Die

Process

Part

} Is a cold- forming operati on, which means that noheat i s intr oduced int o the die or the sheet materialintentionally.

} The stamping die's cutt ing and form ing sections

typi cally are made from special t ypes of hardenablesteel called tool steel or wear- resistant materials.

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} High productivity} Fast tool depreciation} Part repeatabili ty} Part low cost} Easy to automate

} Sheet metal is the engineering material most used for themanufacturing of products in al l industry fields.

} It is the ideal material, due to the following characteristics:? Easy manufacturing? Forming capacity? Low cost

? High productivity


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} Sheet metal parts produced by stamping can replaceparts produced by sinterig, welding and cast ing.

} With the following benef i ts.? Lower weight (ligther)? Higher mechanical strength? Lower cost? Higher productivity (more parts/ hr). notable

} Large dimensions parts can be produced from sheetmetal by stamping allowing great plastic deformation,without material removal.


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} Automotive} Transport} Military} Railway} Aircraft} Household

appliences} Navy


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Punching

Profiling

Drawing

BendingShearing

Blanking

} Cutting? Punching? Shearing? Blanking? Others(Notching, Trimming ,

Slitting)

} Forming? Bending? Drawing? Others (Flanging, Spinning, Prof iling)

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} The sheet metal, positionedbetween two dies, is severed asthe die cutting edges move pasteach ot her.


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} Forming operations deform sheetmaterial by exposing it to tension,compression, or both.

} Most part defects, such as splits andwrinkles, occur in f ormingoperations.

}

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} Forming operation in which the metalis plastically deformed along astraight axis.

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Punch

Die

Sheet

} Metal forming process in which thepart shape is formed by control lingsheet metal flow into a cavity andover a punch.

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} Is a special, one- of- a- kind precision tool that cuts and form ssheet metal into a desired shape or prof ile as the sheet metal ispressed, or stamped, between two mating component s.

} A die gets the fo rce it needs from a press.

} Dies range in size from t hose used for making microelectroni cscomponents, to those used for making entir e autobody sides.

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Die type?

Material(Type, consumption)

Part Size,

Shape and Tol.

Production

Vol., speed

Equipment,

$$$, etc.


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Transfers Progressive

Single-station

Dies

} Each station t hat form s or cuts t hesheet m etal represents a singleoperation die.

} Tools that typically are hand orrobotically loaded.

} Low-production parts

} Production of parts t hat are toobig and bulky to handle withautomation.

} Large line dies are placed inindivid ual presses

} Small line dies can be placedwithi n a single press.


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} Line dies that are timedtogether and spaced an evendistance apart in a singlepress.

} The distance between each dieis referred to as the pi tch.

} Piece parts are transferred byspecial traveling rails moun tedwithin the press boundaries.

} Transfer systems can perfo rmnumerous moti ons. The twobasic types are 2 - D (two- axis)and 3- D (three- axis).

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Parts

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9 10 11

1 . Em but ir.2 . Reducir

embut.3 . Reducir

embut.

4 . Perf il ar .5 . Cal ib rar .6 . Per fo rar .7 . Recor tar8 . Punzonar .9 . Ag uj er ear .10. Bordonar.11. Cortar.

} Is one of the most common, fastest methodsavailable for pr oducing p iece parts.

} Parts are tied together by a port ion of theoriginal strip or coil, called a strip carrier.

} Can prod uce as many as 1,5 00 p arts p erminute.

} All necessary stations are mounted on a singlecommon die set.

} Stations are tim ed and sequenced so that thepiece part can be f ed ahead a constant given

distance called the prog ression or pit ch.


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No blank- holder

Part insufficient flatness

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No blank- holder

Part insufficient flatness


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Blank- holder

Better part flatnessAl l types of operat ions

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All types of operat ions


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} Die plates are steel or alum inum platesthat correspond to the size of the die.

} They serve as the foundation formounting the working die components.

} Must be machined so that they areparallel and flat wi thin a criticaltolerance.

} The machining m ethods are milling andgrinding.

} The upper and lower die shoesassembled together with guide pinscreate th e di e set


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} Align the upper andlower die shoes precisely.

}

} Precision- groundcomponents, oftenmanufactured within0.0001in (0.002 mm )

} There are two basic types

of gu ide pins andbushings:? Fricti on pins? Ball bearin g- style pins.


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} Springs supply the force needed to hold,strip, or form metal.

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BASE SUPERIOR:Materiales: Fundicin GG25Aceros: F111 F112(Oxicorte)

PORTA PUNZONES:Materiales: Ac.: F111 - F112 -F114

GUA PUNZONES:Materiales: Ac. F111 - F112 F114

PISADOR:

Materiales: Ac.: F112 F114 T.y R.F522 T.yR.

PORTA MATRICES:Materiales: Ac. F111 - F112 F114

BASE INFERIOR:Materiales: Fundicin GG25Aceros: F111 F112(Oxicorte)

MATRICES:Materiales: Ac. : F521 F522 T. y R.1.2379 - 1.3343+T y R. + PVDWidia (Metal dur o)

ELEMENTOS GUAMateriales: Ac.: F151-F152 Cementado T. y R.Bronce/ Ac. + Grafito

PUNZONES:Materiales: Ac.: F521- F5221.2379 1.3343+T y R + PVDWidia (Metal duro)

dmh stamping fundamentals bn

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