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A cup of 80 mm inside diameter and 60 mm deep, is to be drawn from a sheet with a thickness of 4mm and a blank diameter of 150 mm. The sheet has 400 MPa tensile strength and 180 MPa yield strength. If the punch and die have radii of 5mm determine:
i) drawing ratio
ii) reduction
Question TWO
iv) drawing force blank holder force
Sagot :
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