Paper Titles
The Influence of Cutting Methods on the Cut-Surface Quality of Titanium Sheets
p.185
Deburring of Sheet Metal by Barrel Finishing
p.193
Numerical Modelling and Analysis of Ductile Crack Propagation in Blanking Process Using Modified Nodal Release Method
p.201
Punching Force Reduction with Wave-Formed Tools
p.209
Improving the Cut Edge by Counter-Shaving
p.217
Development of Cooled Tools for Press Hardening of Boron Steel Sheets
p.225
Laser-Assisted Bending
p.235
Effect of Heat Treatment and Transformation on Bending Angle in Laser Forming of Titanium Foils
p.243
New Forming Processes for Sheet Metal with Large Plastic Deformation
p.251

Improving the Cut Edge by Counter-Shaving

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Abstract:

In blanking operations the cut edge of the sheet metal is not clear due to fracturing and burr formation by the shearing process. For precision parts with high quality and dimensional accuracy, often secondary machining is necessary. Shaving, in particular, counter-shaving, is a shearing operation to improve the cut edge quality of a blanked part or punched hole in two stages. This paper introduces a progressive die tool to realize the counter-shaving process on a single acting press. In order to realize the shaving operation in the opposite punching direction, the punch needs to move in counter direction. The burr and fracture zone left on the sheet metal after the first stage will be removed by the counter-shaving operation. By choosing the right process parameter a sharpedge transition is formed, without any rollover, between the upper surface of the sheet metal and the sheared-edge. Different punch geometries as well as the corresponding process parameters were part of the research work in order to improve the cut edge. Experimental and FEM results are presented for two sheet metal materials at three thicknesses.

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Sheet Metal 2007 View Preview

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Periodical:

Key Engineering Materials (Volume 344)

Pages:

217-224

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.344.217

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Online since:

July 2007

Authors:

Hartmut Hoffmann, Florian Hörmann

Keywords:

Blanking, Counter-Shaving, Production Process

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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