Journal of the Japan Society of Electrical-machining Engineers最新文献_第8页

Surface Modification of Titanium Using Scanning Electrode Method by Electro Discharge Machining 扫描电极法电解加工钛的表面改性

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2001-07-30 DOI: 10.2526/JSEME.35.79_24

Hidekazu Tsukahara, H. Minami, K. Masui, T. Sone, K. Demizu

引用次数: 3

Application Technique of Cu-Be Alloy for Die and Mold Cu-Be合金在模具中的应用技术

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2001-07-30 DOI: 10.2526/jseme.35.79_9

M. Hihara

{"title":"Application Technique of Cu-Be Alloy for Die and Mold","authors":"M. Hihara","doi":"10.2526/jseme.35.79_9","DOIUrl":"https://doi.org/10.2526/jseme.35.79_9","url":null,"abstract":"1. はじめに近年, プラスチック金型やダイカスト金型およびそれらの金=型部品には, 製品寸法の安定化, 変形防止並びに冷却効率や耐食性の向上を目的として, Cu 系, A1系およびZn系非鉄金属材料で製作された金型が多用されている1),2),3),4). 鉄系金型材料を用いた大型プラスチック製品の製造には, 冷却速度の不均一性による変形および引け巣や腐食性ガスの発生に伴うキャビティ面の腐食および冷却水管内の錆などの問題も多く, その改善策として各種の非鉄金属系金型が用いられている.また, ダイカスト金型などの場合には, 金型の湯流れ改善やサイクルタイムの短縮並びに放熱効果を利用した冷却効率の改善などを目的として使用されている. これらCu-Be系材料の金型への適用の目的は, 金型の寿命延長, 成形される部品の品質安定化並びにサイクルタイムの短縮による操業経費の削減などにある. 近年の非鉄金属系材料の多くは, 熱伝導性, 放熱性, 耐食性並びに機械的性質の向上や硬さなどの諸特性が向上し, その利点を利用し大型の金型や鋳抜きピンなどに応用されている. そこで本稿では, 各種の非鉄金属金型の中でも, 時効析出硬化型のCu-Be系合金材料による, 金型への諸特性並びに金型への適用事例について概要を述べる.","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124970612","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 High Performance Wire Electrode for Wire Electric Discharge Machining 线材电火花加工用高性能线材电极的研制

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2001-07-30 DOI: 10.2526/JSEME.35.79_46

S. Aoyama

{"title":"Development of High Performance Wire Electrode for Wire Electric Discharge Machining","authors":"S. Aoyama","doi":"10.2526/JSEME.35.79_46","DOIUrl":"https://doi.org/10.2526/JSEME.35.79_46","url":null,"abstract":"1.はじめにエレクトロニクス化により, 情報通信分野の機器ばかりではなく, 家電品や自動車等の高機能化も図られている, これを支えているのが, 半導体を構成するICリードフレーム製造用の精密金型制作技術や高集積電子部品の微細精密加工技術等の生産加工技術である. これらの技術分野の一角を占める精密加工技術として, ワイヤ放電加工技術がある。これは、その原理から, 超硬金型, セラミックス等の硬質材料の微細加工を可能にする技術であり, 今や工業界では必要不可欠な存在となっている。長年に渡って微細, 高精度, 高速加上技術の追求が行われるとともに合せて無人加工の推進などが進められてきた。最近では, 社会情勢に応じて, 自動車部品や家電製品の部品に代表される部品加工にも本技術が拡張利用されつつある, 本稿では, 現在汎川されている黄銅電極線から最近の新しい被覆型電極線の開発状沙己まで, 金属組織の制御の観点から述べてみたい。","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125446894","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: 9

Distribution of Discharge Location in EDM Using Chaos Theory 基于混沌理论的电火花加工放电位置分布

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2001-07-30 DOI: 10.2526/JSEME.35.79_16

Fuzhu Han, M. Kunieda

{"title":"Distribution of Discharge Location in EDM Using Chaos Theory","authors":"Fuzhu Han, M. Kunieda","doi":"10.2526/JSEME.35.79_16","DOIUrl":"https://doi.org/10.2526/JSEME.35.79_16","url":null,"abstract":"In this paper we describe the analysis of the distribution of discharge location using chaos theory in Electrical Discharge Machining (EDM). Chaos is a nonlinear phenomenon which is determined by a relatively simple rule, although it appears complicated and random. It was found that the discharge location is simply determined by the gap distribution and the debris particle distribution in spite of the complicacy and randomness of these distributions. Namely, the discharge occurs at the location where the gap is narrow and the debris density is high. Consequently, we analyzed the discharge location distribution using chaos theory and found the following: 1) the distribution of discharge location is irregular, 2) a bifurcation is observed, 3) the attractor dimension is relatively small, and 4) at least one of the Lyapunov exponents is larger than zero. By calculating the attractor dimension, we also found that there is a correlation between the attractor dimension and machining stability, that is, the higher the attractor dimension is, the greater the stability of machining is. This means the machining stability, which has not been detectable so far, can be distinguished by calculating the attractor dimension.","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123840827","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

Thermal Fatigue Characteristics for Die Casting Dies and Evaluations of Their Die Life 压铸模具热疲劳特性及其寿命评价

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2001-03-30 DOI: 10.2526/JSEME.35.1

M. Hihara

{"title":"Thermal Fatigue Characteristics for Die Casting Dies and Evaluations of Their Die Life","authors":"M. Hihara","doi":"10.2526/JSEME.35.1","DOIUrl":"https://doi.org/10.2526/JSEME.35.1","url":null,"abstract":"1. 緒言工業製品や民生品の多くは金型と言う「工具」を用いて製造され, 素形材産業の基幹をなしている. 近年のダイカスト金型は製品の複雑化, 薄肉化, 鋳造表面の高機能化並びに高品質化の要求や操業過程における高Si系高温溶湯の接触や鋳造機械の高剛性化等の過酷な環境下での操業を求められている. そこで, 金型のキャビティ面にはヒートチェック, クラック, 溶損, 焼付き, 摩耗等, 各種の欠陥が発生し, 品質安定性を著しく阻害させることが多い. 金型における寿命低下は製造品の品質や操業時の後工程の増加に与える影響が非常に大きく, 安定操業を維持させるための管理技術や有効な寿命改善策が求められている. そのため, 金型の寿命(ヒートチェックや溶損等)に関する諸要因の解析および対策・改善手法等が確立されたならば, 鋳造企業の生産性向上や操業経費の削減等, 多くのメリットが得られ, 如何にしてこれらの対策を講じるかが重要な技術課題になっている. これらの状況を考慮して, ここではダイカスト金型の寿命低下の主要因となる熱疲労挙動とその改善策である窒化処理や複合改質処理の効果並びに放電加工変質層の改善方法等について概要を述べる.","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120905103","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: 2

Fine Deep Boring of Carbide by EDM with YAG Laser YAG激光电火花加工硬质合金精深镗削

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2001-03-30 DOI: 10.2526/JSEME.35.19

Shin-ichiro Kubota, Y. Uno, H. Kuribayashi, S. Yokomizo

{"title":"Fine Deep Boring of Carbide by EDM with YAG Laser","authors":"Shin-ichiro Kubota, Y. Uno, H. Kuribayashi, S. Yokomizo","doi":"10.2526/JSEME.35.19","DOIUrl":"https://doi.org/10.2526/JSEME.35.19","url":null,"abstract":"This paper deals with fine deep boring of carbide alloys. Fine deep boring by EDM is superior for obtaining a qualitatively machined shape and high surface integrity compared to conventional processes. However, it is difficult to obtain a microhole smaller than 100μm in diameter with an aspect ratio larger than 5, because of remaining bubbles and debris in the small gap between the electrode and workpiece which cause unstable machining. A new fine boring method is proposed in which EDM and laser beam machining are combined. First, a penetrating prehole is machined with a YAG laser. In the next process, micro-EDM boring is carried out on the prehole. By removing the bubbles and debris through the prehole, it is possible to maintain stable EDM. With these two successive processes, a fine deep hole is obtained. The hole made by this method has a good roundness and a high aspect ratio that cannot be achieved using only the EDM process. We applied this method to a superfine grain carbide alloy which is widely used for precise metal molds and cutting tools. The main results of this study are as follows. (1) Using the combined process of EDM and LBM, ∅160μm holes were successfully machined through a 2-mm-thick superfine grain carbide. (2) It is possible to remove the bubbles and debris efficiently by suction flow through the prehole. (3) In the case of EDM boring with a prehole, electrode wear mainly occurs on the side of the electrode. (4) For a 1-mm-thick workpiece, it is possible to bore a microhole with a diameter of 100μm and an aspect ratio of 10.","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133746261","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: 2

Surface Integrity of Cemented Carbides Machined by Electrical Discharge Machining after Polishing 电火花加工硬质合金抛光后的表面完整性

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2001-03-30 DOI: 10.2526/JSEME.35.12

T. Tamura, S. Matsumoto

{"title":"Surface Integrity of Cemented Carbides Machined by Electrical Discharge Machining after Polishing","authors":"T. Tamura, S. Matsumoto","doi":"10.2526/JSEME.35.12","DOIUrl":"https://doi.org/10.2526/JSEME.35.12","url":null,"abstract":"Heat-affected zones (HAZs), in which there are many cracks and microcraters, are generated by electrical discharge machining (EDM) of cemented carbides. These defects cause a substantial decrease in the strength of the materials. As one of the countermeasures, HAZs can be removed by polishing, which is dependent on hand finishing. However, it is difficult to remove HAZs completely through polishing. At present, a polishing operator subjectively evaluates whether defects such as cracks exist on a polished surface based on the degree of brilliance of the polished surface. In this study, the relationship between the reflectivity of the polished surface and the transverse rupture strength (IRS) was experimentally examined based on the assumption that polishing to a quasi-mirror-finish surface is not necessarily accompanied by recovery of the strength of the material. Our results showed that the reflectivity of the quasi-mirror-finish surface with surface roughness of 0.2μm Ry is 3-4 percent lower than that of a mirror-finish surface with surface roughness of less than 0.1μm Ry. The IRS ratio of a quasi-mirror-finish surface is 0.7, and that of an electrical discharge machined surface is 0.6 compared with 1.0 for a mirror-finish surface. Thus, we observed that the reflectivity of the quasi-mirror-finish surface is near that of the mirror-finish surface, and that the IRS of the quasi-mirror-finish surface is near that of the electrical discharge machined surface.","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131357019","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: 1

High Precision Machining for Thin Parts by Wire Profiler W-PG1 用W-PG1线形机高精度加工薄型件

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2001-03-30 DOI: 10.2526/JSEME.35.34

M. Ikegame

引用次数: 0

Surface Modification Process using TiH2 Green Compact Electrode by Electrical Discharge Machining TiH2绿色致密电极电火花加工表面改性工艺

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2001-03-30 DOI: 10.2526/JSEME.35.26

T. Moro, A. Goto, N. Mohri, N. Saito, H. Miyake, M. Akiyoshi

引用次数: 2

Femtosecond Fiber Laser and Commercial Applications 飞秒光纤激光器及其商业应用

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2000-11-25 DOI: 10.2526/JSEME.34.77_1

M. Yoshida

{"title":"Femtosecond Fiber Laser and Commercial Applications","authors":"M. Yoshida","doi":"10.2526/JSEME.34.77_1","DOIUrl":"https://doi.org/10.2526/JSEME.34.77_1","url":null,"abstract":"には煩雑な物であった. フェムト秒レーザーの1つの特徴はこの短時間パルスの間にエネルギーが凝縮しているためピークパワーが高い事である. 現在のフェムト秒レーザーの平均出力はmWオーダーであるが, そのピーク出力はKW以上になる。従ってこのレーザーを用いることにより断熱的に高いエネルギーを物質に与える事が可能で, 非線形光学現象を用いた特殊計測に使用される例が多い. 昨年ノーベル化学賞が「フェムト秒光分光を利用した化学反応の遷移状態の研究」によりズベール教授 (カリフォルニア工科大) に授与された事は記憶に新しいであろう. また近頃ではフェムト秒レーザーを用いた超微細精密加工等の応用研究も始まり, 徐々に一般の人の目にも触れる機会が出はじめてきたところである. このようなフェムト秒レーザーは初期には色素レーザーでの発振から始まり, チタンサファイアレーザーの出現により研究分野で普及して来た. チタンサファイアレーザーは波長800nm近辺で波長を可変することができ, さらに構成によっては10フェムト秒を切るパルスの発生波長を可変することができるため, 研究用ツールとしては面白いレーザーである. 又, 近年, チタンサファイアの励起用レーザーを従来のアルゴンイオンレーザーからダイオード励起の全固体型グリーンレーザーへの置き換えができるように","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133209952","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