GATE ME 2016 Set 3 — Question 60
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Manufacturing Processes → Forming → Sheet Metal Operations
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Question
In a sheet metal of mm thickness a hole of mm diameter needs to be punched. The yield strength in tension of the sheet material is MPa and its ultimate shear strength is MPa. The force required to punch the hole (in kN) is __________
Correct answer
4.9 to 5.1
Solution
Given:
Thickness of sheet, mm
Diameter of hole, mm
Ultimate shear strength, MPaThe force required to punch a hole is given by the product of the shear area and the ultimate shear strength of the material.
Shear area,
mmForce,
N
NConverting to kN:
kNThe range specified is 4.9 to 5.1 kN.
Thickness of sheet, mm
Diameter of hole, mm
Ultimate shear strength, MPaThe force required to punch a hole is given by the product of the shear area and the ultimate shear strength of the material.
Shear area,
mmForce,
N
NConverting to kN:
kNThe range specified is 4.9 to 5.1 kN.
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