# Sheet Metal Forming Processes · Metal Forming · GATE PI

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## Marks 1

GATE PI 2016
The ratio of press force required to punch a square hole of $$30$$ $$mm$$ side in a $$1$$ $$mm$$ thick aluminium sheet to that needed to punch a squar...
GATE PI 2013
Circular blanks of $$10mm$$ diameter are punched from an aluminium sheet of $$2$$ $$mm$$ thickness. The shear strength of aluminium is $$80$$ $$MPa.$$...
GATE PI 2012
Match the following metal forming processes with their associated stresses in the Work-piece ...
GATE PI 2003
Which one is not a method of reducing cutting forces to prevent the overloading of press
GATE PI 2003
...
GATE PI 2002
A cup of $$10$$ $$cm$$ height and $$5$$ $$cm$$ diameter is to be made from a sheet metal of $$2mm$$ thickness. The number of deductions necessary will...
GATE PI 2001
For $$50\%$$ penetration of work material, a punch with single shear equal to thickness will
GATE PI 1994
In a bending operation, If the modulus of elasticity $$E$$ is increased keeping all other parameters unchanged, the spring back will
GATE PI 1994
In blanking operation, the best way to improve the smoothness and squarness of the edges is to
GATE PI 1994
The function of draw bead in the deep drawing operation is to
GATE PI 1994
In producing a punched hole of $$20mm$$ diameter, the dimension of the punch is ........ given the radial die clearance of $$0.1mm.$$
GATE PI 1992
Wall thickness of drawn cup is controlled by
GATE PI 1991
In progressive die (for sheet metal), spring loaded stripper plate is used to clamps the stock until:
GATE PI 1991
In .................. A ................. operation the diameter of the desired hole will be smaller than the diameter of the .................... B...
GATE PI 1991
A cup of $$10$$ $$cm$$ height and $$5$$ $$cm$$ diameter is to be made from a sheet metal of $$2mm$$ thickness. The number of deductions necessary will...

## Marks 2

GATE PI 2012
Calculate the punch size in $$mm,$$ for a circular blanking operation for which details are given below. Size of the blank $$25$$ $$mm$$ Thickness of ...
GATE PI 2009
A disc of $$200$$ $$mm$$ diameter is blanked from a strip of an aluminium alloy of thickness $$3.2$$ $$mm.$$ The material shear strength to fracture i...
GATE PI 2008
Match the following ...
GATE PI 2008
A blank of $$50$$ $$mm$$ diameter is to be sheared from a sheet of $$2.5$$ $$mm$$ thickness. The required radial clearance between the die and the pun...
GATE PI 2007
Circular blanks of $$35$$ $$mm$$ diameter are punched from a steel sheet of $$2$$ $$mm$$ thickness. If the clearance per side between the punch and d...
GATE PI 2006
It is required to punch a hole of diameter $$10mm$$ on a sheet of thickness $$3mm.$$ The shear strength of the work material is $$420Mpa.$$ The requir...
GATE PI 2006
A work piece of $$1000$$ $$mm$$ length and $$300$$ $$mm$$ width is machined by planning operation with a feed of $$0.3$$ $$mm/stroke.$$ The machine t...
GATE PI 2006
A gear with $$84$$ teeth is to be machined using a milling process with indexing. The index plate has the following four hole circles: $$36,38, 42., 4... GATE PI 2006 Match the items in Group -$${\rm I}$$and$${\rm I}{\rm I}$$... GATE PI 2006 In a surface broaching process, a broach having$$5mm$$pitch and cut per teeth$$0.05mm$$is used for reducing the thickness by$$6mm.$$If the lengt... GATE PI 2006 It is required to punch a hole of diameter$$10mm$$on a sheet of thickness$$3mm.$$The shear strength of the work material is$$420MPa.$$The requir... GATE PI 2006 A cup is to be drawn to a diameter of$$70mm$$with$$35mm$$depth from a$$0.5mm$$thick sheet metal. The cup is drawn in one operation. Assume$${\...
GATE PI 2006
A cup is to be drawn to a diameter of $$70mm$$ with $$35mm$$ depth from a $$0.5mm$$ thick sheet metal. The cup is drawn in one operation. Assume $${\... GATE PI 2005 A$$\phi \,\,25mm$$hole is pierced in a$$t=2.5mm$$thick steel sheet having shear strength$$\tau = 350\,\,MPa.$$If the diametral clearance i... GATE PI 2004 A cylindrical cup of$$48.5mm$$diameter and$$52mm$$height has a corner radius of$$1.5mm$$Cold rolled steel sheet of thickness$$1....
GATE PI 2004
A hole of $$40$$ $$mm$$ diameter is pierced in a steel sheet of $$4$$ $$mm$$ thickness without shear on the tool. Shear strength of steel is $$400$$ \$...
GATE PI 2004
Determine the load required to punch a $$20$$ $$mm$$ diameter hole in $$2$$ $$mm$$ thick sheet. The properties of the material of the sheet are: Tensi...
GATE PI 2004
In deep drawing of sheet metal, spring loaded stripper clamps the work until:
GATE PI 2003
Consider the following statements related piercing and blanking $$1.$$ Shear on the punch reduces the maximum cutting force $$2.$$ Shear increases the...
GATE PI 2003
A hydraulic press is used to produce circular blanks of $$10$$ $$mm$$ diameter from a sheet of $$2$$ $$mm$$ thickness. If the shear strength of the sh...
GATE PI 2002
In sheet metal working, the spring back increase when $$P:$$ Ratio of bend radius to sheet thickness is small $$Q:$$ Young's modulus of the sheet is ...
GATE PI 1994
In metal forming operation, the true strain in the $$X$$-direction is $$0.3$$ and in the $$Y$$-direction is $$-0.1.$$ The true strain in the $$Z$$-dir...
GATE PI 1992
A hemispherical cup of radius $$'R'$$ is formed in a press working operation. The radius of blank would be
GATE PI 1990
Calculate the smallest punch diameter that can be designed for piercing sheet metal strip with the following data. Crushing strength of the punch mate...
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