A procedure for the formation of metal cazoletas, from which, still stretching, you can obtain metal hollow bodies closed in the fund (Machine-translation by Google Translate, not legally binding)

摘要

Process for the formation of metal cups, from which, by stretching, it is possible to obtain closed metallic hollow bodies in the bottom, characterized in that buttons with almost square contour are cut out of a material of flat laminated bars (11); because these buttons (11) are formed, with the help of a press device working vertically to the rolling direction of the initial material, in almost round flanged disks (12), for which a punch penetrates the button until almost the thickness of the bottom of the desired bowl has been reached; because the flanged discs in the subsequent pressing step using a punch (35, 36, 37) inserted in the corresponding die (30) are pressed with the shoulder (36) so that the material flows in the direction of pressing the punch and form concentric cups (13). (Machine-translation by Google Translate, not legally binding)