Fabrication of Deep Cup with Flange by In-Plane Stretch Forming Applying Compressive Force in Thickness Direction

Shohei Kajikawa; Takashi Iizuka; Takashi Kuboki

doi:10.4028/www.scientific.net/KEM.716.897

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 716Fabrication of Deep Cup with Flange by In-Plane...

Fabrication of Deep Cup with Flange by In-Plane Stretch Forming Applying Compressive Force in Thickness Direction

Abstract:

This paper presents a new stretch forming method that applies compressive force for forming a deep cup with a flange. In this method, a punch and a die having a hole are used, and the main parameters are the depth of the die hole, d_dh, and the clearance between the punch and the die, c. The effect of d_dh and c was investigated by using an aluminum blank of thickness 2 mm in an experiment and a finite element analysis (FEA). When d_dh was too small, the material flow could not be controlled appropriately, and when d_dh was too large, a local thinning occurred during initial stretching into the die hole. When c was set at large, the side wall thickness of the formed cup was uneven, but a deep cup could be obtained by setting c below a half of the blank thickness. As a result, a deep cup of height 8.3 mm and with a flange was formed successfully under the condition that d_dh was 1.5 mm and c was 0.5 mm.

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Periodical:

Key Engineering Materials (Volume 716)

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897-906

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.716.897

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Online since:

October 2016

Authors:

Shohei Kajikawa*, Takashi Iizuka, Takashi Kuboki

Keywords:

Aluminum Sheet, Compression, Deep Cup, Flange, Ironing, Stretching

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