巻号一覧
42 巻 (2008)
- 101 号 p. 122-
- 100 号 p. 51-
- 99 号 p. 5-
42 巻, 100 号
選択された号の論文の3件中1～3を表示しています
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山崎 実, 鈴木 岳美, 森 紀年, 寺西 義一, 国枝 正典2008 年 42 巻 100 号 p. 51-57
発行日: 2008/07/28
公開日: 2009/02/24
ジャーナル フリーWe describe the limit of miniaturization in micro-electrical discharge machining (EDM) using self-drilled holes. By this method, a microrod is machined using the edge of a hole drilled beforehand by the rod itself in the same setup. Hence, microrods can be machined very precisely without special equipment. To further decrease the minimum machinable diameter of microrods, the single-step forming method, double forming method, spark-out forming method, and step forming method were proposed. The minimum diameter was obtained by the single-step forming method. The straightest microrods were formed by the spark-out forming method.抄録全体を表示PDF形式でダウンロード (3497K) -
西本 圭吾, 猪飼 健夫, 橋口 清人, 宇野 義幸2008 年 42 巻 100 号 p. 58-64
発行日: 2008/07/28
公開日: 2009/02/24
ジャーナル フリーThe kind of electrode and its internal structure affect greatly electrical discharge characteristics such as metal removal rate and surface roughness. A new electrode, in which the insulator plate is inserted between thin copper plates, was proposed in this study, in order to achieve a high removal rate without deteriorating the surface roughness. The result of an impulse discharge experiment with this new electrode shows that a larger crater was generated compared with that having a copper solid electrode. It is also clarified that, in repetitious discharge machining using this electrode, the surface roughness doe's not increase even in high-removal-rate machining.抄録全体を表示PDF形式でダウンロード (6831K) -
- 各種ダイヤモンド基複合電極による放電加工 -佐野 定男, 岩井 学, 植松 哲太郎, 鈴木 清2008 年 42 巻 100 号 p. 65-72
発行日: 2008/07/28
公開日: 2009/02/24
ジャーナル フリーThis paper deals with an investigation of new diamond-based composite electrodes for electrical discharge machining (EDM), which have similar EDM performances, lower cost and more flexibility in size and shape compared with an electrically conductive CVD (EC-CVD) diamond thick film electrode. The EC-CVD diamond thick film electrode with high thermal diffusivity was found, in the authors' previous study, to show very low electrode wear in finish EDM with a short pulse on time, compared with conventional copper and Cu-W electrodes. Among some diamond-based composite materials, it was found experimentally that, in EDM of a die-steel material and tungsten carbide material, a polycrystalline diamond (PCD) electrode shows a very low electrode wear ratio, similar to the EC-CVD diamond electrode, in a wide range of pulse on time of 1μs to 30μs and that the material removal rate of the PCD electrode is about 50% and 80% of the EC-CVD diamond electrode for die-steel and tungsten carbide, respectively. The results of the investigation of the reason behind the excellent EDM performance of the PCD electrode by FEM analysis suggested that the temperature rise of the electrode was restrained because of the high thermal diffusivity of the diamond in PCD and high electrical conductivity of the cobalt binder in PCD.抄録全体を表示PDF形式でダウンロード (1627K)
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