Title: Process-integrated quality monitoring and control in closed die forging

Authors: Heiko Schneider, Soenke Ruesch

Addresses: Institut fur Umformtechnik und Umformmaschinen, Universitat Hannover, Welfengarten 1A, D-30167, Hannover, Germany. Institut fur Umformtechnik und Umformmaschinen, Universitat Hannover, Welfengarten 1A, D-30167, Hannover, Germany

Abstract: Because of the high temperatures of closed die forged parts during and after deformation, a direct in-process acquisition of the workpiece quality is not possible. In order to improve the economic efficiency of the process by means of process-integrated methods for quality inspection, an indirect procedure for workpiece inspection has to be used. For an exemplary forging process, such a monitoring system has been realised. It allows a quick evaluation of the product quality directly after the forging cycle. Additionally, a trend-detection and automatic control are integrated into this system. These modules are supposed to keep the workpiece quality constant within the tolerance limits even for trend-like process variations.

Keywords: hot metal forming; computer aided quality assurance (CAQ); forging; process control; process automation; trend analysis.

DOI: 10.1504/IJMTM.2002.002520

International Journal of Manufacturing Technology and Management, 2002 Vol.4 No.6, pp.479-488

Published online: 19 Jul 2003 *

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