Three-dimensional Shaping by Dot-matrix Electrical Discharge Machining with Miniaturized Electrode Feeding Devices

采用小型化电极进给装置的点阵放电加工三维成型

• 批准号: 06452196
• 负责人: MOHRI Naotake
• 金额: $ 4.42万
• 依托单位: Toyota Technological Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06452196/
• 关键词: electrical discharge machining; repid prototyping; three-dimensional shaping; linear drive mechanism; piezoelectric element; 微細加工; インチワ-ム機構; ワイヤ電極; リニアドライブ

A new prototyping method called a dot-matrix electrical discharge machining (EDM) with scanning motion is proposed, and a prototype of a machining unit by the dot-matrix method is developed. The machining process by the dot-matrix method is similar to printing motion with a dot impact printer. This method can be applied to not only EDM but also electrochemical machining and forming. A prototype of the machining unit has six feeding devices for thin wire electrodes. The electrodes of 300 mum in diameter are arranged with the pitches of 760 mum. It measures 55*55*80 mm. To obtain a smooth surface, a planetary motion in the xy plane is added to the feeding of the machining unit in the zdirection, the same area is machined repeatedly or the machining unit is moved with fine feed. By compensating the wear of the electrode during the scanning EDM,various shapes with the accuracy of micrometers order can be obtained without a formed tool electrode.Discharge concentration causes cracks on the machined surface. Discharge current is supplied to each wire electrode independently to realize complete discharge dispersion so that a crack-less surface can be obtained. The discharge dispersion does not depend on the resisitivity of a workpiece by divided supplying in the dot-matrix EDM.The surface modification by EDM with thin wire electrodes is also investigated.

提出了一种具有扫描运动的点阵式电火花加工的新方法，并利用点阵法研制了加工单元的样机。点阵法的加工过程类似于点击式打印机的打印运动。该方法不仅适用于电火花加工，也适用于电解加工和成形。加工单元的原型有六个细丝电极进给装置。电极直径300微米，间距760微米。它的尺寸为55*55*80毫米。为了获得光滑的表面，加工单元在Z方向的进给中加入XY平面上的行星运动，重复加工同一区域或以精细进给移动加工单元。通过对扫描电火花加工过程中电极的磨损进行补偿，可以在不形成工具电极的情况下获得微米量级的各种形状，放电集中会导致加工表面出现裂纹。放电电流独立提供给每根线电极，实现完全的放电分散，从而获得无裂纹的表面。在点阵式电火花加工中，放电色散不依赖于被加工件的电阻率。本文还研究了细丝电极电火花加工表面改性。

项目成果

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Katsuji Furuya：“小孔放电加工的电极进给机构的比较”日本电气工程师学会杂志 28. 41-50 (1994)。

古谷克司ほか: "衝撃力を利用したリニアダイレクトドライブ機構" 精密工学会誌. 61. 527-531 (1995)

K. Furuya 等人：“使用冲击力的线性直接驱动机构”日本精密工程学会杂志 61. 527-531 (1995)。

K.Furutani et al. (in Japanese): "Comparison Between Electrode Feeding Devices for Small-Hole Machining by EDM" Journal of the Japan Society of Electrical-Machining Engineers. Vol.28. 41-50 (1994)

K.Furutani 等人。

Hiromichi MOrita et al.: "Electrical Discharge Device with Direct Drive Method for Thin Wire Electrode" Proc. of the 1995 IEEE International Conference on Robotics and Automation. 73-78 (1995)

Hiromichi MOrita 等人：“采用细线电极直接驱动方法的放电装置”Proc。

古谷克司ほか: "ドットマトリクス方式を用いた放電加工による3次元形状創成加工法(第1報)-加工法の提案-" 精密工学会誌. 63. 254-258 (1997)

K. Furuya 等人：“使用点阵法的放电加工的 3D 形状创建加工方法（第 1 次报告）-加工方法的提案 -”日本精密工程学会杂志 63. 254-258（1997 年）。