FIELD: metallurgy.
SUBSTANCE: invention relates to the field of metal working with a pressure and can be used in stamping a metal plate into a product of a trough-shaped section of an L-shaped curved shape along a longitudinal direction in a plan view. When the punch is pushed into the die, the first guide surface of the first die of the preceding section precedes the second guide surface of the second die. In this case, the sliding of the first pressing of the preform and the preceding section relative to the punch is limited, and pressing the punch into the die is continued in a restricted state.
EFFECT: reduces the formation of cracks and folds in the product.
5 cl, 15 dwg
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