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http://dx.doi.org/10.5762/KAIS.2011.12.4.1565

A Scheme of Preventing Product Shortage for Die Casting Scheduling  

Park, Yong-Kuk (School of Mechanical and Automotive Engineering, Catholic University of Daegu)
Yang, Jung-Min (Department of Electrical Engineering, Catholic University of Daegu)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.12, no.4, 2011 , pp. 1565-1574 More about this Journal
Abstract
Scheduling of die casting is a procedure of determining quantities of cast products so as to optimize a predetermined performance criterion. This paper presents a novel scheme of preventing product shortage raised by defective castings when die casting scheduling is applied to real casting operations. The previously developed linear programming (LP) model for die casting scheduling maximizes the average efficiency of melting furnaces in regard of the usage of molten alloy. However, the LP model is not able to cope with the problem of defective products occurring in the casting process. The proposed scheme is that whenever defective products are found in a shift, the foundryman produces additional cast products using the residue of molten alloy left at the end of the next shift. Neither the calculated amount of molten alloy nor the scheduling result of the LP model does not have to be altered for this method. The simulation result demonstrates the superiority and applicability of the newly proposed scheme.
Keywords
Die Casting; Scheduling; Linear Programming; Product Shortage; Efficiency of Molten Alloy;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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