Investigation of a Two-Step Rotary Rim-Thickening Process of Disc-Like Blanks

Dao Kuan Wang; Jun Song Jin; Xin Yun Wang

doi:10.4028/www.scientific.net/MSF.920.89

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HomeMaterials Science ForumMaterials Science Forum Vol. 920Investigation of a Two-Step Rotary Rim-Thickening...

Investigation of a Two-Step Rotary Rim-Thickening Process of Disc-Like Blanks

Abstract:

A two-step rotary rim-thickening process of disc-like blanks was investigated by FE simulation and spinning experiments. The preforming shape of cross section for first step was designed as trapezium before forming rectangular-shape rim in the second step. The main factors influencing the blank forming in the first step were groove bottom height h₁ and the inclination angle α of the roller. With the increase of h₁ and α of the roller in FE simulation, the workpiece will be more prone to lose stability and cause defects. The forming limit diagram was obtained in first step, including stable forming zone, unstable forming zone and failed forming zone. Considering the stability and efficiency of thickening, four groups of h₁and α were selected for the second step simulation. Maximum rim thickness (h₂) after second-step forming was 9 mm, obtained by trial and error in FE simulations. The spinning experiments were carried out to verify the validity of numerical simulation.

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Periodical:

Materials Science Forum (Volume 920)

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89-94

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.920.89

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Online since:

April 2018

Authors:

Dao Kuan Wang, Jun Song Jin, Xin Yun Wang*

Keywords:

Forming Limit Diagram, Rim-Thickening, Sheet Metal, Spinning

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