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Automatic design of a deep-drawn circumscribing preform

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3 Author(s)
Eshel, G. ; Sch. of Ind. Eng., Purdue Univ., West Lafayette, IN, USA ; Barash, Moshe M. ; Chandru, V.

The authors describe a procedure for the automatic design of a preform based on circumscription algorithms. The procedure is defined in general terms and applied to preforms realized by axisymmetric deep-drawing processes. The automatic design procedure is supervised by a `generate, test, and rectify' tactic. The `generate' stage hypothesizes a deep-drawn preform that either contains the finished workpiece or is `close' to doing so. If the workpiece is not fully contained by the initial preform, the latter is `rectified'. Rectification applies small changes to the radii of bending and to the wall thickness of the hypothesized preform cup. Either rectification continues recursively or a new hypothesis is generate. The cup is defined by its medial and a nominal uniform wall thickness. The design is accepted when a circumscribing cup is produced. The supervisory search mechanism is a combination of A*, hill-climbing, and depth-first

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Robotics and Automation, IEEE Transactions on  (Volume:5 ,  Issue: 2 )