B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/69
B21D 22/20 (2006.01) B21D 22/22 (2006.01) B21D 22/30 (2006.01) B21D 24/00 (2006.01)
Patent
CA 1072404
Title: "A process and a device for cold working metal sheet, with a double action in a single operative stage". . ABSTRACT OF THE DISCLOSURE A device for cold working a metal sheet, with double action in a sin- gle operative stage, suitable particularly for forming drawn articles in a single body with a shaped and folded bottom, comprising reciprocating drawing means including a forming punch rigid with a first part of a reciprocating press; a male member ar- ranged for carrying out a conventional drawing operation in cooperation with a sheet- presser; said male member receiving in its inside an auxiliary punch mounted partial- ly slidable within said male member, said auxiliary punch being arranged for coope- rating with an elastic element; the arrangement being such that at the point of maxi- mum engagement between said forming punch and said male member said auxiliary punch carries out a first shaping operation of the bottom of said drawn body with the contemporaneous storage of deformation power in said elastic element and said auxi- liary punch carries out the deformation or folding of said bottom at the moment of the mutual moving away of said male member from said forming punch due to the release of the deformation power of said elastic element on said auxiliary punch.
286379
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