In previous studies, it is known that forming products with practical depth made of AZ31 magnesium alloy sheets can be obtained by applying the warm-deep drawing, where a heated die, blank holder and water-cooled punch are used. However, influence of tool radius, which is one of significant factors on deep drawing formability, has not been examined systematically under the practical forming speed condition in which hydraulic or mechanical press machine forming are assumed. In this study, we systematically examined effects of tool radius and forming speed on the forming limit of warm-deep drawing for the cylinder and square cups. Furthermore, we studied the possibility of the reform of a square cup with small shoulder and corner radii by sizing, as it is difficult to form by only deep drawing.
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