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Study on the effect in micro electrical discharge milling using bipolar pulse and deionized water : 바이폴라 펄스를 사용한 초경합금의 미세방전 밀링 특성 분석
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 주종남 | - |
dc.contributor.author | 여동윤 | - |
dc.date.accessioned | 2017-07-14T03:36:06Z | - |
dc.date.available | 2017-07-14T03:36:06Z | - |
dc.date.issued | 2015-02 | - |
dc.identifier.other | 000000024802 | - |
dc.identifier.uri | https://hdl.handle.net/10371/123801 | - |
dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 기계항공공학부, 2015. 2. 주종남. | - |
dc.description.abstract | Micro electrical discharge milling (ED-milling) is an effective process for machining of micro structures on hard metals. This method of machining generally uses kerosene or deionized water as a dielectric fluid, both of which are associated with some problems. Kerosene results in considerable electrode wear and deionized water causes electrolytic corrosion in workpiece. Cobalt-bonded tungsten carbide (WC-Co) has been recently used in many industry areas because of its superior mechanical characteristics such as high strength and wear resistance. However, it is difficult to machine WC-Co due to its characteristics. Moreover, it is impossible to make micro-sized figures on WC-Co workpiece using conventional machining methods. In this study, micro ED-milling was carried out using only bipolar pulsed power source to prevent electrolytic corrosion and electrode wear without additional methods. WC-Co was used for the workpiece and micro grooves were machined on the WC-Co workpiece. As a result, optimal pulse condition capable of eliminating electrolytic corrosion is found through the experiments and practical ED-milling was carried out using this condition. | - |
dc.description.tableofcontents | Abstract
List of figures List of tables 1. Introduction 1.1 Research background 1.2 Research objective and thesis overview 2. Principle and experiments 2.1 Micro electrical discharge machining (Micro EDM) 2.2 Tungsten carbide with cobalt binder (WC-Co) 2.3 Bipolar pulse 2.4 Deionized water 2.5 Experimental setup 3. Machining results 3.1 Electrolytic corrosion 3.2 Electrode wear 3.3 Material removal rate 3.4 Tungsten electrode 4. Conclusion Reference 국문초록 | - |
dc.format | application/pdf | - |
dc.format.extent | 5034977 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | Micro EDM | - |
dc.subject | Tungsten carbide | - |
dc.subject | Electrolytic corrosion | - |
dc.subject | Electrode wear | - |
dc.subject | Bipolar pulse | - |
dc.subject.ddc | 621 | - |
dc.title | Study on the effect in micro electrical discharge milling using bipolar pulse and deionized water | - |
dc.title.alternative | 바이폴라 펄스를 사용한 초경합금의 미세방전 밀링 특성 분석 | - |
dc.type | Thesis | - |
dc.contributor.AlternativeAuthor | Dong-Yun Yeo | - |
dc.description.degree | Master | - |
dc.citation.pages | vi, 43 | - |
dc.contributor.affiliation | 공과대학 기계항공공학부 | - |
dc.date.awarded | 2015-02 | - |
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