Abstract
In this report, basing on the equilibrium equation of moments induced in the first report, the critical conditions of wrinkling are considered and discussed for the case where a blankholding plate is used. In the practice of the deep drawing operations, we must often allow the small flange wrinkles, but when the wave amplitude of wrinkles in flange is lower than the allowoble value the cups remain practically no wrinkles, because the effects preventing the flange wrinkles exist in the die radius. Consequently, the existence of the allowable wave amplitude of wrinkles in flange is infered and then by means of inducing it into the equation the author can propose a formula predicting the critical blank-holding pressure necessary to prevent the development of radial wrinkles in the flange.
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