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Thermo-mechanical analysis of metallized stereolithography EDM electrodes

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dc.contributor.advisor Sheikh-Ahmad, Jamal Y. en_US
dc.contributor.author Mathew, Jeeson
dc.date.accessioned 2007-05-04T14:33:13Z
dc.date.available 2007-05-04T14:33:13Z
dc.date.issued 2005-12
dc.identifier.other t05019
dc.identifier.uri http://hdl.handle.net/10057/572
dc.description Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Industrial and Manufacturing Engineering en
dc.description "December 2005." en
dc.description Includes bibliographic references (leaves 109--111) en
dc.description.abstract EDM is widely accepted in tool and die industries for its versatility in machining hardened steels. Its ability to machine heat treated hardened steels eliminates the conventional method of heat treatment after machining which results in distortions. However one draw back of the EDM process, which makes its uses limited, is the high cost and time for the electrode manufacture. The die sinking EDM process employs complex shaped electrodes which require specialized machining operation and often results in high lead times. Solid free form fabrication is found to be an excellent alternative for the conventional all metal electrodes for EDM. Rapid prototyping of the electrode models and electroforming with copper is a fervently studied method of producing cost effective electrodes. However most of the studies have reported premature failure of the electroformed electrodes, limiting its commercial use on a large scale. This study attempts to analyze the failure mechanism of electroformed stereo-lithography electrodes by conducting a finite element analysis of the electrode model using LSDYNA- 970. It has been shown that high temperatures and coefficient of thermal expansion mismatch are the primary reasons for the premature failures experienced in these types of electrodes. The study also proposes some design modifications to improve the electrode performance during repeated thermal loading. The modified electrodes showed significantly improved performance in analysis studies. en
dc.format.extent xii, 152 leaves: ill., digital, PDF file.
dc.format.extent 3328144 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.rights Copyright Jeeson Mathew, 2005. All rights reserved. en
dc.subject EDM en
dc.subject Electrode performance en
dc.subject.lcsh Electronic dissertations en
dc.title Thermo-mechanical analysis of metallized stereolithography EDM electrodes en
dc.type Thesis en

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