An experimental investigation for macro-textured tool in hot stamping
1 Department of Mechanical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK
2 School of Mechanical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
a Corresponding author: e-mail: KZ313@imperial.ac.uk
This paper presents a method of increasing draw-ability of materials in hot stamping processes using forming tools with macro-scale textures on the tool surfaces. Cold and hot stamping processes of a top-hat shape were conducted to evaluate the effects on macro-scale surface textures on the material drawing. Texture directional and texture ratio effects on the draw-ability have been investigated. A more uniform thickness distribution and improved draw-ability was found using the blankholders with surface textures, which is believed to be caused by the lower temperature loss derived from the smaller contact area.
© Owned by the authors, published by EDP Sciences, 2015
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