Metal deforming – By extruding through orifice – With cutting
Patent
1977-10-20
1981-01-20
Larson, Lowell A.
Metal deforming
By extruding through orifice
With cutting
72264, 72353, 72354, 72356, 72359, 72327, 72325, 72373, 72377, 72379, B21C 2300, B21D 3100, B21D 5326
Patent
active
042454913
ABSTRACT:
A planar material to be press-formed is confined in a space having a contour corresponding to the outer contour of the flange part of an article to be produced and is pressed between a punch member having a through hole corresponding to the outer contour of the hollow main part of the article and another die member holding slidably a mandrel having an outer contour corresponding to the inner contour of the internal bore of the hollow article, the mandrel being simultaneously projected into the through hole of the first member. By the pressing action, the peripheral part of the material is formed into the flange part of the article while an inward flow of the material is caused, thereby elevating the surface of the material in the through hole of the punch member and forming a recess in the opposite side surface of the material. The mandrel is projected simultaneously with said pressing action, whereby topless hat-shaped product is easily formed by one step.
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Kondo Kazuyoshi
Nakamura Yoshiaki
Kabushiki Kaisha Wako
Larson Lowell A.
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