Journal of the Japan Society of Electrical-machining Engineers最新文献_第3页

An Overview of the Recent Trends on Laser Material Processing Scanner Welding and Rapid Prototyping 激光材料加工、扫描焊接和快速成型研究进展综述

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2004-07-30 DOI: 10.2526/JSEME.38.88_8

Teruyoshi Kadoya

{"title":"An Overview of the Recent Trends on Laser Material Processing Scanner Welding and Rapid Prototyping","authors":"Teruyoshi Kadoya","doi":"10.2526/JSEME.38.88_8","DOIUrl":"https://doi.org/10.2526/JSEME.38.88_8","url":null,"abstract":"2.1 背景現在欧州では, 各自動車メーカはレーザをボディの溶接に積極的に採用するようになってきた. しかしながら, レーザ発振器は, 抵抗スポット溶接やアーク溶接と比べて購入価格が格段に高く, レーザ溶接システムをボディの生産に導入しても, 生産コストがかえって高くなり, トータルではコスト高になると考えられる場合もある. そこで, レーザの利点を生かしてさらにコストダウンをはかる方法が期待されている. 2.2 利点ふっう, レーザ溶接するには, レーザ加工ヘッドまたはワークおよび治具, あるいは両者を駆動させる. スキャナー溶接は, レーザ発振を止めている時間を短縮できるだけでなく, 結果としてトータルの加工時間や最終仕上げ製品の品質を向上させる. スキャナー溶接の利点を下記する. (1) ワークや加工ヘッドを移動させる必要がないため, 高速でダイナミック. (2) 高溶接速度. (3) 狭隆な個所でも即座にレーザ照射可能. (4) 実質的にレーザ照射していない駆動時間がなく, デューティ比はほとんど100%. (5) 溶接がスムーズでパーツへの溶接時間が短く, ワークの溶接作業時間が少ないため, 溶接ひずみが最小となる施工法が選択できる. 2.3 原理 2.3.1 スキャナー溶接システムスキャナー溶接では, レーザビームをワークの溶接個所に照射するために1ないし2枚のミラーが使用される. ミラーは, 炭酸ガスレーザではワークから1m以上上方に設置される. ミラーをわず","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127263710","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

Lecture for Beginners Studying Electrical Machining (1) 电工加工入门讲座(一)

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2004-07-30 DOI: 10.2526/JSEME.38.88_29

H. Obara

引用次数: 2

Electrical Discharge Phenomena in Fluids with Suspended Conductive Particles between Electrodes 电极间悬浮导电颗粒流体中的放电现象

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2004-07-30 DOI: 10.2526/jseme.38.88_21

H. Tsuchiya, H. Goto, M. Miyazaki, K. Egashira, K. Sudo, K. Ono

{"title":"Electrical Discharge Phenomena in Fluids with Suspended Conductive Particles between Electrodes","authors":"H. Tsuchiya, H. Goto, M. Miyazaki, K. Egashira, K. Sudo, K. Ono","doi":"10.2526/jseme.38.88_21","DOIUrl":"https://doi.org/10.2526/jseme.38.88_21","url":null,"abstract":"Electrical discharge phenomena in fluids have been observed using suspended small steel balls placed between electrodes, in order to investigate the effect of debris not attached to tool electrodes or a workpiece on the generation of discharge in electrodischarge machining (EDM). Discharge occurs at certain voltages only when a ball is inserted between electrodes. Images taken using a high-speed camera show that, with one ball, the first dielectric breakdown takes place between one electrode and the ball, followed by the second breakdown between the other electrode and the ball, before spark discharge begins between the electrodes. With two balls, the breakdowns between an electrode and a ball precede that between the balls. These results suggest that the presence of suspended debris facilitates the generation of discharge in EDM and that the discharge between electrodes occurs after breakdowns take place between an electrode and debris, between a workpiece and debris, and among debris. Electrical fields are calculated by the finite element method, indicating that the first breakdown occurs at the gap with the highest electrical field.","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115022232","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

Surface Modification by Electric Discharge Machining (2nd Report) : Application of Surface Modification of electric discharge machining for complicated shapes 电火花加工表面改性(第二报告):电火花加工复杂形状表面改性的应用

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2004-07-30 DOI: 10.2526/jseme.38.88_13

M. Sano, K. Yatsushiro, K. Okada

引用次数: 0

High Efficiency Finishing Process by PIKA Finish Machine 皮卡精加工机的高效精加工工艺

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2004-03-26 DOI: 10.2526/JSEME.38.45

Zhanbo Yu, Toyohisa Sakurai, M. Morioka

{"title":"High Efficiency Finishing Process by PIKA Finish Machine","authors":"Zhanbo Yu, Toyohisa Sakurai, M. Morioka","doi":"10.2526/JSEME.38.45","DOIUrl":"https://doi.org/10.2526/JSEME.38.45","url":null,"abstract":"1, はじめに金型は自動車や電気製品等の部品加工に不可欠であり, 製品の品質および生産性を左右する生産工程にはなくてはならない機械要素である-この金型の製作には切削加工, 放電加工, レーザ加工等の多種にわたる加工法が用いられるが, これらの加工法を用いて製作した金型の加工面をそのまま使用することは稀であり, 表面粗さの低減マイクロクラックや白層等の表面欠陥層の除去, 形状精度改善のため, 最終工程において, 手磨きによる仕上げ加工が行われることが一般的である. 手磨き仕上げ加工工程は熟練者の技能に頼るところが多く, また, 長時間を要することから, コスト高となり, 品質管理も難しく, 高能率化が以前から課題となっていた. 当社は, 金型市場のニーズにマッチし, 金型の表面品質を向上させ, さらに, 手磨き仕上げ加工工程を省くことを目的として, 電子ビームを用いて最大ビーム直径100mm (有効範囲60mm) の大面積仕上げを可能にする高能率仕上げ加工装置「電子ビームPIKA面加工装置」を永田精機 (株), 岡山大学・宇野研究室と共同で開発した. 図1に当社が開発した電子ビームPIKA面加工装置PF32Aの外観を示す. この電子ビームPIKA 面加工装置を用いると, 金型の表面仕上げ加工を数分でこなすことができ, 熟練者が数十時間をかけて行っていた手磨き作業を大幅に効率化することができる. さらに, ビーム照射面には耐食性や擾水性が備わるため, 金型の長寿命化や, プラスチック金型においては, 成形品の離型が向上する等の付加価値の高い金型に仕上げることが可能である. そこで, 本報告では電子ビームを用いた表面仕上げの加工原理を解説するとともに, 当社が開発した電子ビームPIKA面加工装置「PF シリーズ」の概要について報告する.","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116636939","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

Electrode Materials for Electrical Discharge Machining 电火花加工用电极材料

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2004-03-26 DOI: 10.2526/JSEME.38.7

Y. Sakai, N. Ooba, H. Ogawa, O. Yasuda, H. Katougi

引用次数: 0

Improvement of Controllability of Discharge Locations in WEDM 电火花加工中放电位置可控性的改进

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2004-03-26 DOI: 10.2526/JSEME.38.31

Fuzhu Han, M. Kunieda, Hiroto Asano

引用次数: 5

Copper-Tungsten Alloy Electrode for Electric Discharge Machining 电火花加工用铜钨合金电极

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2004-03-26 DOI: 10.2526/jseme.38.12

T. Igarashi

{"title":"Copper-Tungsten Alloy Electrode for Electric Discharge Machining","authors":"T. Igarashi","doi":"10.2526/jseme.38.12","DOIUrl":"https://doi.org/10.2526/jseme.38.12","url":null,"abstract":"2. 放電加工電極としてのCu-W合金, Ag-W合金放電加工速度は被加工材料の熱伝導率 (λ) と融点 (θm) の積 (λθm) に比例し, 加工に必要な最低エネルギー密度もλθmにほぼ比例することが明らかにされ, 電極には λθmが大きい材料が適していると考えられている1). 実際形彫用電極にはCu, 等方性グラファイト, Cu-W合金および Ag-W合金†が使われている. Table1に各種電極材料の θm, λ, λθm, および熱膨張係数 (α) を示す(λ,α は室温における値). 20mass% (以下, 単に%) Cu*W合金および20%Ag-W合金のαはそれぞれ8.5および8.7×10-6Klである. Cu-W合金およびAg-W合金は, 電極材料としての汎用性が高いCuに比べてλが高くαが小さい特長があり, 超硬合金の加工に最も適している. Cuやグラファイトは広範囲の用途に使用されているが, Cu-W合金はCuより電極消耗が少なくクリアランスの小さい加工ができるにもかかわらず, 高価なために高精度加工が求められる鋼製および超硬合金製のプレス抜き金型や粉末冶金用金型などの加工, および極小径パイプなどの特殊形状電極に限定されている. Ag-W合金はさらに高価であるため, 超硬合金の一部の加工に使われているに過ぎない.","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131520838","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

Tribological Properties of Surface Modified Layer of Titanium using EDM Process 电火花加工钛表面改性层的摩擦学性能

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2004-03-26 DOI: 10.2526/JSEME.38.24

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

引用次数: 2

EDM Process Using Chemical Reaction of Organometallic Compound 利用有机金属化合物的化学反应进行电火花加工

Journal of the Japan Society of Electrical-machining Engineers Pub Date : 2004-03-26 DOI: 10.2526/JSEME.38.37

Hidekazu Tsukahara, H. Minami, Seojoon Lee, H. Hagino, K. Masui, T. Sone

{"title":"EDM Process Using Chemical Reaction of Organometallic Compound","authors":"Hidekazu Tsukahara, H. Minami, Seojoon Lee, H. Hagino, K. Masui, T. Sone","doi":"10.2526/JSEME.38.37","DOIUrl":"https://doi.org/10.2526/JSEME.38.37","url":null,"abstract":"In this paper, we examine the EDM process utilizing chemical reactions between organometallic compounds. The oxidization of the dielectric oil facilitates in proportion to working time. The reaction between organometallic compounds causes their transition from a hydrocarbon to a fatty acid containing carboxylic acid, etc. When an oxidized dielectric oil is used in EDM, the metal elements in the electrode and workpiece react to the oxidized oil and organometallic compounds are consequently formed. Several organometallic compounds are olephilic and dissolve in dielectric oil. This denotes that some of the debris from the electrode and/or workpiece metal are dissolved in the dielectric oil. This reaction is often observed as a change in the color of the dielectric oil, such as in the case of the organometallic compound iron, which becomes yellow. The reaction strongly influences the EDM process.Accordingly, by actively utilizing the reactions between organometallic compounds, some of the debris from the electrode and/or workpiece can be dissolved in dielectric oil. This would result in a decrease in debris and provide stability to the EDM process.","PeriodicalId":269071,"journal":{"name":"Journal of the Japan Society of Electrical-machining Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134624042","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