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Статья. Опубликована в журнале "Precision Engineering". – 2012. – Vol. 36, Issue 3. – P. 510-516.
Статья на английском языке.Название на русском языке: Финишная обработка внутренней поверхности капиллярных трубок с помощью магнитно-абразивной обработки с использованием многополюсной системы.Аннотация к статье на английском языке: Due to difficulties in controlling magnetic abrasive in the finishing area during internal magnetic abrasive finishing (MAF) of capillary tubes, the finished length is limited in practice to just a few times the pole-tip width. The accumulation of multiple short finishing passes is necessary for long-tube finishing, which results in excessive finishing times. The use of a multiple pole-tip system with a tool, a solid rod consisting of alternating magnetic and nonmagnetic regions, was proposed to overcome this issue. The tool enables multiple finishing regions to be engaged simultaneously. This paper clarifies the finishing characteristics and mechanism and shows the effects of the tool’s magnetic properties (including the intervals between magnetic and non-magnetic regions) on the tool and abrasive motion and the interior finishing characteristics of capillary tubes. This paper also proposes a simple method to determine the pole-tip feed length, which allows the MAF process to achieve a uniformly finished surface in half the time of the existing single pole-tip system.
E-Book Content
Precision Engineering 36 (2012) 510–516
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Precision Engineering journal homepage: www.elsevier.com/locate/precision
Technical note
Internal finishing of capillary tubes by magnetic abrasive finishing using a multiple pole-tip system Junmo Kang, Hitomi Yamaguchi ∗ Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL 32611, United States
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Article history: Received 15 August 2011 Received in revised form 17 December 2011 Accepted 18 January 2012 Available online 10 February 2012 Keywords: Magnetic abrasive finishing Capillary tube Metastable austenitic stainless steel Multiple pole-tip system Heat treatment
a b s t r a c t Due to difficulties in controlling magnetic abrasive in the finishing area during internal magnetic abrasive finishing (MAF) of capillary tubes, the finished length is limited in practice to just a few times the pole-tip width. The accumulation of multiple short finishing passes is necessary for long-tube finishing, which results in excessive finishing times. The use of a multiple pole-tip system with a tool, a solid rod consisting of alternating magnetic and nonmagnetic regions, was proposed to overcome this issue. The tool enables multiple finishing regions to be engaged simultaneously. This paper clarifies the finishing characteristics and mechanism and shows the effects of the tool’s magnetic properties (including the intervals between magnetic and non-magnetic regions) on the tool and abrasive motion and the interior finishing characteristics of capillary tubes. This paper also proposes a simple method to determine the pole-tip feed length, which allows the MAF process to achieve a uniformly finished surface in half the time of the existing single pole-tip system. © 2012 Elsevier Inc. All rights reserved.
1. Introduction In the magnetic abrasive finishing process, material is removed as a result of the relative motion between the workpiece surface and magnetic abrasive under the influence of a magnetic field. Control of the magnetic field at the finishing area is required in order to generate the magnetic force necessary for finishing. The smaller the tube diameter (e.g., capillary tubes), the more critical is the control of the magnetic field. A simple method