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Effects of process related variations on defect formation in investment cast components
Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation. TPC Components AB, Hallstahammar, Sweden.ORCID iD: 0000-0003-3086-0901
TPC Components AB, Hallstahammar, Sweden .
TPC Components AB, Hallstahammar, Sweden .
Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.ORCID iD: 0000-0002-7816-1213
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2018 (English)In: Archives of Foundry Engineering, ISSN 1897-3310, E-ISSN 2299-2944, Vol. 18, no 1, p. 103-108Article in journal (Refereed) Published
Abstract [en]

Castability of thin-walled castings is sensitive to variation in casting parameters. Variation in casting parameters can lead to undesired casting conditions which result in defect formation. Variation in rejection rate due to casting defects from one batch to another is a common problem in foundries and the cause of this variation is usually not well understood due to the complexity of the process. In this work, variation in casting parameters resulting from human involvement in the process is investigated. Casting practices of different groups of operators were evaluated and resulting variations in casting parameters were observed and analyzed. The effect of these variations was evaluated by comparing the rejection statistics for each group. In order to minimize process variation, optimized casting practices were implemented by developing specific process instructions for the operators. The significance of variation in casting parameters in terms of their impact on foundry rejections was evaluated by comparing the number of rejected components before and after implementation of optimized casting practices. It was concluded that variation in casting parameters due to differences in casting practices of various groups of operators has significant impact on casting quality. Variation in mould temperature, melt temperature and pouring rate due to differences in handling time and operator practice resulted in varying quality of components between batches. By implementing an optimized standard casting instruction, both quality and process reliability were improved significantly.

Place, publisher, year, edition, pages
2018. Vol. 18, no 1, p. 103-108
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
URN: urn:nbn:se:mdh:diva-38768DOI: 10.24425/118820ISI: 000435927100019Scopus ID: 2-s2.0-85046717206OAI: oai:DiVA.org:mdh-38768DiVA, id: diva2:1186056
Available from: 2018-02-27 Created: 2018-02-27 Last updated: 2018-07-12Bibliographically approved

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Raza, MohsinFagerström, Björn

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  • apa
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