巻号一覧
37 巻 (2003)
- 86 号 p. 10-
- 85 号 p. 5-
- 84 号 p. 1-
37 巻, 84 号
選択された号の論文の6件中1～6を表示しています
- |<
- <
- 1
- >
- >|
-
森 勇蔵, 広瀬 喜久治, 後藤 英和2003 年 37 巻 84 号 p. 1-8
発行日: 2003/03/25
公開日: 2010/03/12
ジャーナル フリーPDF形式でダウンロード (10937K) -
小林 俊樹, 国枝 正典2003 年 37 巻 84 号 p. 9-16
発行日: 2003/03/25
公開日: 2010/03/12
ジャーナル フリーThis paper describes a newly developed hybrid EDM system which is composed of the multispark EDM system and conventional EDM system. Multispark EDM is characterized by higher removal rates and lower energy consumption compared with conventional EDM. However, it was difficult to obtain a continuously stable state with the multispark mode. This hybrid EDM system therefore switches the operation mode from the multispark mode to the conventional mode when the process becomes unstable. Then, if the gap state satisfies the condition under which the multispark mode can work stably, the mode is switched back to the multispark mode. From experiments, it was confirmed that the hybrid system developed works very well even under the machining conditions which make the process unstable with the multispark mode.抄録全体を表示PDF形式でダウンロード (2701K) -
放電加工特性とフレーム電極による三次元創成加工南 久, 増井 清徳, 塚原 秀和, 山本 龍也, 大上 光生2003 年 37 巻 84 号 p. 17-22
発行日: 2003/03/25
公開日: 2010/03/12
ジャーナル フリーHigh-strength Zn alloy (ZAPREC) was developed for improving the mechanical properties of commercial Zn alloy (ZAS). This paper describes the EDM machinability of Zn alloy for die making. The experimental results were compared with die steel (SKD11) machinability. As a result, newly developed Zn alloy gives high-speed EDM with lower electrode wear ratio under the finishing conditions. Therefore, Zn alloy with these excellent EDM machinabilities enables effective die making using three-dimensional contouring EDM by wire frame electrode.抄録全体を表示PDF形式でダウンロード (6860K) -
絶縁性粉体の堆積層への分散古谷 克司, 砂田 洋尚2003 年 37 巻 84 号 p. 23-30
発行日: 2003/03/25
公開日: 2010/03/12
ジャーナル フリーThis paper deals with a fabrication method of an abrasive layer by electrical discharge machining (EDM). A grinding wheel should be frequently dressed and as a result its total life becomes shorter. When the total life of the grinding wheel has ended, the grinding wheel is disposed of even if its core is still usable. To extend the total life of the grinding wheel by recycling, a fabrication process of an abrasive layer by EDM is proposed. The layer deposited by EDM with a green compact electrode is porous due to the electrical conditions. The green compact electrode was made by compressing a mixture of WC, Co and an abrasive, which is generally an insulating material. The layer produced with the dispersed abrasive powders with a size of 20-100μm could be deposited on a plate. The grain size and the thermal conductivity mainly affect the layer properties. Each grain volume percentage was evaluated with a partial section analyzed by energy dispersive X-ray spectroscopy. The volume percentages of #150 and #400 SiC grains were 6% and 10%, respectively, when the volume ratio of the SiC grains in each electrode was 32%. These ratios are much smaller than that of conventional grinding wheels, 34-62% in nominal. The hardness of the WC-Co layer without abrasive was 102 HRRS, harder than a general vitrified bond wheel. Because the deposit of the WC-Co layer was very hard, tight gripping of grits can be also expected.抄録全体を表示PDF形式でダウンロード (12175K) -
研削による砥粒層の評価古谷 克司, 砂田 洋尚2003 年 37 巻 84 号 p. 31-38
発行日: 2003/03/25
公開日: 2010/03/12
ジャーナル フリーThis paper deals with a fabrication method for a grinding wheel by electrical discharge machining (EDM) and its evaluation through practical grinding. When the total life of the grinding wheel has ended, the grinding wheel is thrown away although its core is still usable. Depositing an abrasive layer by EDM with a green compact electrode is proposed to fabricate a recyclable grinding wheel for cost reduction. Some metallic disks were practically ground with a #400 SiC abrasive layer. The grinding ratio against steel was 6.9. Then the deposit process for a cylinder was proposed to fabricate and recycle a mounted wheel. The maximum difference for a thickness of 300μm was 10μm by the shape feedback machining method. Although the additional layer was deposited without any cleaning in the recycle process, it performed as well as a new one. Therefore, the abrasive layer fabricated by EDM can be used for grinding.抄録全体を表示PDF形式でダウンロード (13520K) -
鋼材では達成できない金型加工速度と成形品質大上 光生2003 年 37 巻 84 号 p. 39-44
発行日: 2003/03/25
公開日: 2010/03/12
ジャーナル フリーPDF形式でダウンロード (5913K)
- |<
- <
- 1
- >
- >|