By comparison with the actual sheet texture those textural components which most affect earing behaviour are identified.
Earing sheet metal drawing.
The other major factor causing the punch to draw the sheet metal and not cut it is the amount of clearance.
Clearance in cutting operations is relatively small usually 3 to 8 of sheet metal thickness.
Earing is one of the major defects observed during deep drawing process due to anisotropic nature of sheet metal.
Earing is one of the major defects observed during deep drawing process due to anisotropic nature of sheet metal.
Earing is defined as formation of waviness on uppermost portion of deep drawn cup.
In deep drawing manufacture if the clearance is too small the sheet may be cut or pierced not well despite the radius.