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Metal Matrix Composites
Open AccessArticle

Die Defects and Die Corrections in Metal Extrusion

Mechanical and Industrial Engineering Department, Sultan Qaboos University, Muscat 123, Oman
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Metals 2018, 8(6), 380; https://doi.org/10.3390/met8060380
Received: 5 May 2018 / Revised: 21 May 2018 / Accepted: 22 May 2018 / Published: 24 May 2018
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Abstract

Extrusion is a very popular and multi-faceted manufacturing process. A large number of products for the automotive, aerospace, and construction sectors are produced through aluminum extrusion. Many defects in the extruded products occur because of the conditions of the dies and tooling. The problems in dies can be due to material issues, design and manufacturing, or severe usage. They can be avoided by maintaining the billet quality, by controlling the extrusion process parameters, and through routine maintenance. Die problems that occur on a day-to-day basis are mostly repairable and are rectified through various types of die correction operations. These defects and repair operations have not been reported in detail in the published literature. The current paper presents an in-depth description of repairable die defects and related die correction operations in metal extrusion. All major die defects are defined and classified, and their causes, preventive measures, and die correction operations are described. A brief frequency-based statistical study of die defects is also carried out to identify the most frequent die corrections. This work can be of direct benefit to plant engineers and operators and to researchers and academics in the field of metal extrusion. View Full-Text
Keywords: metal extrusion; die defects; product defects; process parameters; die corrections; definitions; causes; classification; frequency analysis metal extrusion; die defects; product defects; process parameters; die corrections; definitions; causes; classification; frequency analysis
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Qamar, S.Z.; Pervez, T.; Chekotu, J.C. Die Defects and Die Corrections in Metal Extrusion. Metals 2018, 8, 380.

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