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Variable Blank Holder Force Control of Tailor Welded Blanks Based on H Theory

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Abstract:

Due to deficiency of constant blank holder force (BHF) method in the stamping process of tailor weld blanks (TWBs), the H control theory for the variable BHF is hereby proposed in this paper. The control objective for the H control is built and the control model, algorithm control and logic control are designed. Based on the designed model, the feedback numerical simulation is used to analyze the influence of the H control method on defect of TWBs. In order to verify the simulation result, the test is conducted on the variable BHF hydraulic press. The simulation and test results show that the automotive body inner side panel can be successfully stamped based on the H control theory for the variable BHF. Considering the stamping tip and blank holder board position, the proposed BHF determination approach can avoid wrinkling and cracking under constant BHF which makes it a robust strategy.

Keywords: BODY ENGINEERING; H∞; TAILOR WELDED BLANKS; THEORY; VARIABLE BLANK HOLDER FORCE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/asl.2011.1977

Publication date: November 1, 2011

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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