Paper Title:
Increase of Wall Thickness around Corner of Multi-Stage Drawn Cup with Flange Using Conical Punches
  Abstract

The wall thickness around an inner corner in 3-stages formed cups with a flange was increased by means of conical punches in the 1st and 2nd stages. Since the strength of the formed cups is greatly improved by the increase in wall thickness, the weight of the formed products is reduced by an optimum distribution obtained from the increase in wall thickness. The increase in thickness around the inner corner is obtained by compressing the side wall and conical bottom of the cup in the 3rd stage. As the punch angle increases, the increase in thickness at the inner corner becomes large. The amount of compression is expressed by a drawn volume after the 2nd stage. A maximum 9% increase in wall thickness around the inner corner was successfully obtained for the punch angle of 25º.

  Info
Periodical
Key Engineering Materials (Volumes 340-341)
Edited by
N. Ohno and T. Uehara
Pages
761-766
DOI
10.4028/www.scientific.net/KEM.340-341.761
Citation
C.J. Tan, Y. Abe, K. Mori, O. Ebihara, T. Nonaka, "Increase of Wall Thickness around Corner of Multi-Stage Drawn Cup with Flange Using Conical Punches", Key Engineering Materials, Vols. 340-341, pp. 761-766, 2007
Online since
June 2007
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