Production of Tapered Cups by Sequential Deep Drawing of Sheet Metals Using Drawn Cups as a Part of Punch

[+] Author and Article Information
K. Yamaguchi, M. H. Parsa, N. Takakura

Department of Mechanical and System Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606, Japan

K. Kanayama

Government Industrial Research Institute of Nagoya, Hirate-machi, Kita-ku, Nagoya 462, Japan

J. Eng. Ind 115(2), 224-229 (May 01, 1993) (6 pages) doi:10.1115/1.2901653 History: Received September 01, 1990; Revised August 01, 1992; Online April 08, 2008


A new deep drawing process of sheet metals is developed to facilitate small-lot production of deep cups with large drawing ratio. In this process, unlike the conventional deep drawing method, a few drawn cups are always stacked on the punch and used as a part of punch for the subsequent deep drawing of a given blank. Before drawing a new blank, a drawn cup which is in contact with the punch is stripped off. The repetition of such stripping and drawing operations makes it possible to carry out both the first-stage drawing and the subsequent slight redrawings in one drawing operation using only one pair of punch and die. In this paper, this new deep drawing process is applied to the production of tapered cups and the main feature of the process is shown.

Copyright © 1993 by The American Society of Mechanical Engineers
Topics: Sheet metal , Blanks
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