FIELD: machine building.
SUBSTANCE: invention is intended for use in machine building and in aerospace engineering in production of shell parts from sheet blanks by deep drawing. Workpiece end surface is exposed to preformed lead to form a hole therein, causing workpiece deformation in the direction of the well. At further action of lead on central part of punching, it is turned into working cavity of rigid matrix until formation of part.
EFFECT: higher quality of parts due to reduced thinning in part wall.
1 cl, 5 dwg
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