Laboratory for Dynamics of Machines and Structures 
A novel laboratory blanking apparatus for the experimental identification of blanking parameters
 J. Slavič, S. Bolka, V. Bratuš and M. Boltežar
Journal of Materials Processing Technology, Volume 214, Issue 2, February 2014, Pages 507-513

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Abstract
High-quality blanking depends on several blanking parameters that are difficult to investigate with industrial blanking presses. In this research, a novel laboratory blanking apparatus that allows quasi-static and dynamic blanking at different blanking speeds is presented. With a clear focus on the dynamics of the blanking process, the inertial correction of the punch force, the surface velocity and the surface temperature of sheet-metal are researched. In addition, measurements of the punch-die misalignment and the punch-die inclination-angle are discussed. The apparatus is also able to perform a partial penetration of the punch to a selected depth with an accuracy of better than 10 micro-meter. The apparatus was shown to offer us a new insight into the blanking process that can increase our understanding and therefore result in better numerical models and better products.
Authors

Associate Professor

Janko Slavič, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  janko.slavic@fs.uni-lj.si
  +386 1 4771 226
jankoslavic     jankoslavic    
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R&D

Špela Bolka, PhD

  Hidria Rotomatika, d.o.o.
  spela.bolka@hidria.com
  +386 1 4771 229

Head of Department

Vitoslav Bratuš, PhD

  Hidria Rotomatika
  
  

Professor

Miha Boltežar, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  miha.boltezar@fs.uni-lj.si
  +386 1 4771 608
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