Journal of the Japan Society of Electrical-machining Engineers最新文献

Consideration of Formation Mechanism of Conductive Layer in Electrical Discharge Machining of Insulating Si 3 N 4 Ceramics 绝缘si3n4陶瓷电火花加工中导电层形成机理的思考

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2016-07-01 DOI: 10.2526/JSEME.50.112

Hiromitsu Gotoh, T. Tani, N. Mohri

引用次数: 0

Electrochemical Machining of Sintered Carbide (1st Report): - Prevention of Excessive Co Elution -@@@－Coの溶出防止の方法－烧结硬质合金的电化学加工(第一报告):-防止Co过量洗脱-@@@-Co

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2015-07-01 DOI: 10.2526/JSEME.49.117

A. Goto, T. Moroi, Masato Uematsu, N. Saito, N. Mohri, T. Yuzawa

引用次数: 3

形彫り放電加工特性に及ぼす放電加工油物性の影響(第1報) : 導電性材料の放電加工の場合形雕り放电加工特性に及ぼす放电加工油物性の影响(第1报) : 导电性材料の放电加工の场合

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2013-07-31 DOI: 10.2526/JSEME.47.81

花岡大生, 渡邉利行, 福澤康, 北村友彦

引用次数: 1

Study on effect of assist gas in electrolyte jet machining 辅助气体在电解液射流加工中的作用研究

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2013-07-31 DOI: 10.2526/JSEME.47.97

Shoya Kai, M. Kunieda

引用次数: 1

Nanometer-Resolution Cross Sectional Observation of the Changes in Multilayer Thin Films and Substrates due to Laser Ablation 激光烧蚀引起的多层薄膜和衬底变化的纳米分辨率截面观察

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2012-07-31 DOI: 10.2526/JSEME.46.66

S. Shida, Okihara Shin-ichiro, K. Suda, K. Haraguchi, Y. Kato

引用次数: 0

ワイヤ放電加工用高性能ワイヤ電極の開発に関する研究（第４報）－ワイヤ表面の高抵抗層が放電加工特性に及ぼす影響－电线放电加工用高性能电线电极开发研究(第4报)-电线表面高电阻层对放电加工特性的影响-

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2011-07-30 DOI: 10.2526/JSEME.45.64

晃岡田, 俊之山内, 正典中澤, 敏明清水, 義幸宇野

{"title":"ワイヤ放電加工用高性能ワイヤ電極の開発に関する研究（第４報）－ワイヤ表面の高抵抗層が放電加工特性に及ぼす影響－","authors":"晃岡田, 俊之山内, 正典中澤, 敏明清水, 義幸宇野","doi":"10.2526/JSEME.45.64","DOIUrl":"https://doi.org/10.2526/JSEME.45.64","url":null,"abstract":"The purpose of this study is to develop a new type of coated wire electrode for fine-wire EDM. A piano wire with a very high tensile strength is coated with an electrically conductive brass layer to achieve high-speed and high-precision wire EDM. In our previous studies, by using a thin wire of 50 μm in diameter, the thickness and quality of the brass coating layer were optimized, and the effect of surface unevenness was also discussed. In this paper, the effects of the oxidation of the wire surface and high-resistance layer on the wire electrode were experimentally investigated. It was found that more sparks occur selectively in front of the wire and less sparks on the side surface of wire with the high-resistance layer on the wire surface. Consequently, the kerf width decreased and the removal rate increased with the optimum thickness of the layer. Also, the occurrence of a short circuit between the wire and the machined surface was reduced because of presence of a high-resistance layer on the wire surface.","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126924204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Study of High-Speed Microhole Drilling by Combined Process using Laser and EDM-Apply for fuel injection nozzle- 激光与电火花复合高速微孔钻削研究——适用于喷油器

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2010-07-30 DOI: 10.2526/JSEME.44.45

H. Morita, Tetsuji Yamaguchi, N. Mohri

{"title":"Study of High-Speed Microhole Drilling by Combined Process using Laser and EDM-Apply for fuel injection nozzle-","authors":"H. Morita, Tetsuji Yamaguchi, N. Mohri","doi":"10.2526/JSEME.44.45","DOIUrl":"https://doi.org/10.2526/JSEME.44.45","url":null,"abstract":"In the automobile industry, increasing the demands for better environment protection and resource conservation entails for lowering both fuel cost and exhaust emission. This is because combustor efficiency is markedly influenced by grain size, spray pattern, and the injection volume of fuel atomization. Therefore, to increase combustor efficiency it is effective to improve the size, pattern, and accuracy of nozzle holes. In mass production, conventional processing methods for nozzle holes include stamping and drilling. Noncontact processes such as electric discharge machining (EDM) has the advantages of smaller size, better pattern flexibility and better accuracy, however, they are not suitable for mass production. In this study, we introduced a new EDM method with both good accuracy and good productivity that are suitable for the finish machining of microholes having a diameter less than 0.2 mm. We found that for finish boring by EDM, the smaller the depth of cut, the lower the processing efficiency. Thus, to solve this problem, we suggested a new method that entails overlaying high frequency vibration to the electrode, and verified the effectiveness of the method by experiments. We verified the effective use of a high-frequency electrode feeding device together with the direct drive method for improving the processing efficiency. The finish EDM developed method is now in practical use in the mass production of fuel injection nozzle holes, which start as preholes made using a YAG laser.","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129282912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Coated Wire Electrode for High-Performance WEDM (3rd Report)-Effects of wire surface unevenness on wire EDM characteristics- 高性能电火花加工用涂覆线材电极的研制(第三次报告)-线材表面不均匀度对线材电火花加工特性的影响-

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2009-11-30 DOI: 10.2526/JSEME.43.179

A. Okada, T. Yamauchi, Masayuki Higashi, Toshiaki Shimizu, Y. Uno

{"title":"Development of Coated Wire Electrode for High-Performance WEDM (3rd Report)-Effects of wire surface unevenness on wire EDM characteristics-","authors":"A. Okada, T. Yamauchi, Masayuki Higashi, Toshiaki Shimizu, Y. Uno","doi":"10.2526/JSEME.43.179","DOIUrl":"https://doi.org/10.2526/JSEME.43.179","url":null,"abstract":"The purpose of this study is to develop a new type of coated wire electrode for fine wire EDM. Piano wire with a very high tensile strength is coated with an electrically conductive brass layer to achieve high-speed and high-precision wire EDM. In our previous papers, using a thin wire of 50μm diameter, the thickness and quality of the brass coating layer were optimized and the effect of the tensile strength of the piano wire used as the core wire was discussed. In this report, the effect of unevenness of the brass wire electrode surface was experimentally investigated. As a result, it was found that by using wire with relatively large surface unevenness, the machining rate increased because of the high discharge frequency. Also, a more uniform distribution of the discharge location was confirmed by high-speed observation of the working gap during the process. In addition, the electrostatic field in the gap between the wire electrode and workpiece surface was analyzed and the reason for the high machining rate for the wire with relatively large surface unevenness was discussed from the viewpoint of the distribution of electric intensity distribution on the wire surface.","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121894621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Study of precision micro-Electro-Discharge Machining (3rd Report)-Analysis of micro-EDM process with deionized water- 精密微细电火花加工研究(第三期报告)-去离子水微细电火花加工分析

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2009-11-30 DOI: 10.2526/JSEME.43.163

T. Masaki, T. Kuriyagawa

{"title":"Study of precision micro-Electro-Discharge Machining (3rd Report)-Analysis of micro-EDM process with deionized water-","authors":"T. Masaki, T. Kuriyagawa","doi":"10.2526/JSEME.43.163","DOIUrl":"https://doi.org/10.2526/JSEME.43.163","url":null,"abstract":"The micro-EDM process with deionized water as a dielectric fluid is used for nozzle production because of its high speed and low tool wear benefits. However, this process causes the formation of defects due to the electrolysis corrosion and processing limitation of applicable materials. It was considered that the electrolysis corrosion is induced by the ion produced as a result of the electro-discharge process. The process mechanism is considered in line with the theory indicating that electrolysis occurs in the deionized water when a high voltage is applied. Oxygen and H are formed at the anode surface during electrolysis, the carbon in the anode is oxidized, and part of the metal is corroded. For tungsten carbide, the corrosion is severe. A pulse shorter than 40ns can inhibit electrolysis and allow a highly precise micro-EDM to use deionized water with tungsten carbide. The tool wear ratio is 0.025% by volume and the processing speeds that are 150 times higher than those under the same conditions using oil as a dielectric fluid are verified. In addition, the mechanism of the electrolysis corrosion in stainless steel and the capability of the improved surface quality to control the generated electrolysis are explained. Micro-EDM, deionized water, electrolysis, tungsten carbide Vol.43, No.104 (2009)","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113936428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Electrical Discharge Machining Using Isolated and Bundled Flat Plate Electrode 采用隔离和捆扎平板电极的放电加工

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2008-07-28 DOI: 10.2526/JSEME.42.58

Keigo Nishimoto, Takeo Ikai, Kiyoto Hashiguchi, Y. Uno

引用次数: 0