FORMING METHOD OF DI CAN

PURPOSE:To form a projecting type stepped shape to a side corresponding to a side wall of a can and a cover of the can, by drawing a bottom part of the can to a projecting type stepped shape so as to be smaller than the inside diameter, and also executing redrawing so that it becomes smaller than sa...

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Bibliographische Detailangaben
Hauptverfasser:	KOUNO SHIGEHIKO, TANABE JIYUNICHI, AIDA HIROSHI, OKANO HIROYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	PURPOSE:To form a projecting type stepped shape to a side corresponding to a side wall of a can and a cover of the can, by drawing a bottom part of the can to a projecting type stepped shape so as to be smaller than the inside diameter, and also executing redrawing so that it becomes smaller than said inside diameter. CONSTITUTION:When forming a DI (deep-drawing and squeezing working) can, a bottom part of a drawn can 7 of an inside diameter A is drawn to a projecting type stepped shape so as to be smaller than A, and it is drawn by denoting its inside diameter as B and in the ratio of a range of A/B=1.20-2.61. Also, this drawn can is used, passes through dies of 3a, 3b and 3c in an ironing press, and is squeezed to a can having prescribed side wall thickness. A punch of a diameter ratio B/C=1.00-1.63 of the inside diameter B of the projecting type stepped part and a diameter C of the redrawn part goes forward in the direction of a die 8, a punch 6 is redrawn by the die 8 at the final stroke, and is formed to the projecting type stepped shape.