期刊
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
卷 53, 期 1, 页码 170-175出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijmachtools.2011.11.002
关键词
Magnetorheological fluid; Micro-machining; Burr; Abrasive; Micromold
资金
- National Research Foundation of Korea (NRF)
- Korean Government (MEST) [2011-0018086]
- National Research Foundation of Korea [핵06A1107] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
It is difficult to deburr a micro-machined surface because the micro-features are easily damaged during the deburring processes. This paper proposes a new deburring process utilizing a magnetorheological fluid and applies it to the production of micromolds. A magnetorheological fluid is a functional fluid with a variable yield stress that is controlled by an external magnetic field. The proposed process utilizes two material removal mechanisms induced by the magnetorheological fluid flow. Extensive yielding of material is effective for deburring sheet-shaped burrs, and abrasive wear is effective for deburring protrusion-shaped burrs. A process model was developed to describe the effectiveness of each mechanism for specific burr geometries. The performance of the proposed method was verified experimentally. Metal burrs with a height of 200 mu m and thickness of 1 mu m were removed successfully with extensive yielding and abrasive wear. Burrs shorter than a few micrometers could be removed only by abrasive wear. The material removal behaviors of sheet-shaped and protrusion shaped burrs matched the proposed process model well. (C) 2011 Elsevier Ltd. All rights reserved.
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