FIELD: metallurgy.
SUBSTANCE: invention relates to the manufacture of molded articles made of sheet steel with high tensile strength with trough cross-sectional shape having the bottom of the trough, ribs, side walls and flanges. Compression molding is carried out in two stages. Herein at the first stage the shoe presses the part to the punch to mold a trough bottom, and a part area to mold a rib. At the second stage the remaining parts are molded.
EFFECT: increased product quality by eliminating notches on the edge of the flange area adjacent to the rib.
12 cl, 13 dwg
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