Improved part quality in stamping using multi-input multi-output (MIMO) process control

  • Authors:

  • Yongseob Lim;Ravinder Venugopal;A. Galip Ulsoy

  • Affiliations:

  • Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI;Intellicass Inc., Montréal, Canada and University of Québec at Montréal, Canada;Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI

  • Venue:
  • ACC'09 Proceedings of the 2009 conference on American Control Conference
  • Year:
  • 2009

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Abstract

The binder force in sheet metal forming controls the material flow into the die cavity, and maintaining precise material flow characteristics is crucial for producing a high-quality stamped part. Process control can be used to adjust the binder force based on tracking a reference punch force trajectory to improve part quality and consistency. The purpose of this paper is to present a systematic approach to the design and implementation of a suitable MIMO process controller. The approach includes modeling of the sheet metal forming process, and the design of the process controller based on simulation. Experimental results from a complex-geometry part show that the MIMO process controller, designed through simulation, is effective.