In the deep drawing of cups, blanks show a tendency to wrinkle up around the periphery (flange). The most likely cause and remedy of the phenomenon are, respectively.

High blank holder pressure and high friction; Reduce blank holder pressure and apply lubricant.

Buckling due to circumferential compression; Increase blank holder pressure.

High blank holder pressure and high friction; Reduce blank holder pressure and apply lubricant.

High temperature causing increase in circumferential length; Apply coolant to blank.

Buckling due to circumferential compression; decrease blank holder pressure.

In the deep drawing of cups, blanks show a tendency to wrinkle up arou

1.	In the deep drawing of cups, blanks show a tendency to wrinkle up around the periphery (flange). The most likely cause and remedy of the phenomenon are, respectively.
A.	Buckling due to circumferential compression; Increase blank holder pressure.
B.	High blank holder pressure and high friction; Reduce blank holder pressure and apply lubricant.
C.	High temperature causing increase in circumferential length; Apply coolant to blank.
D.	Buckling due to circumferential compression; decrease blank holder pressure.
Answer» B. High blank holder pressure and high friction; Reduce blank holder pressure and apply lubricant.

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In the deep drawing of cups, blanks show a tendency to wrinkle up around the periphery (flange). The most likely cause and remedy of the phenomenon are, respectively.

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