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Study on Electro-Discharge Micro-Machining --- Machining of Micro-Spindles, Using a Travelling Wire Electrode ---

放电微加工研究——使用走丝电极加工微主轴——

基本信息

批准号：
60460087
负责人：
MASUZAWA Takahisa
金额：
$ 4.8万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60460087/
关键词：
EDM Electro-discharge grinding Wire electro-discharge grinding Micro-machining Micro-spindle NC

项目摘要

Methods for producing very thin spindles are required to obtain an electrode for micro-electro-discharge drilling or a punch for micro-punching. This project regards with developing a system which meets this demand. The wire electro-discharge grinding mehtod is tested of its possibility. The machining characteristics, applicabilities to a very thin spindle, micro-hole ED drilling, formation of rods with various shape etc. are tested. This method is a kind of electro-discharge grinding. A wire which travels along a wire-guide is used as the electrode. Differently from the usual WEDM, the discharge takes place at the guided position of the wire. It gives a high machining accuracy. Main experimental results using a prototype 2-axis-controlled equipment are as follows; (1) Longitudinal deviation of the diameter was less than 1 <mu> m. (2) Accuracy of the zero-adjustment of x-axis affected the finished diameter. (3) The descharge gap increased when the depth of cut or the discharge capacity was increased. These influences were reduced by setting the offset value as a table in the memory of the controller. (4) Change of the workpiece material gave little influecnce on the machining accuracy. However, the machining time and the machined surface integrity were affected. (5) Micro-holes were able to be ED drilled in various materials, using the spindle machined by this method. (6) A taper spindle could be machined by simultaniously controlling the X- and Z-axis. Finally, a 4-dimension-controlled equipment was constructed and the possibility of forming a poligon rods was confirmed.

需要用于制造非常薄的心轴的方法以获得用于微放电钻孔的电极或用于微冲压的冲头。本课题就是要开发一个满足这一需求的系统。试验了电火花线切割磨削法的可行性。测试了该机床的加工特性、对极细主轴的适用性、微细孔艾德钻削、各种形状杆件的成形等。该方法是一种电火花磨削方法。沿着导线沿着行进的导线用作电极。与通常的线切割不同，放电发生在导线的引导位置。它提供了一个高的加工精度。利用双轴控制样机进行的主要实验结果如下：（1）直径纵向偏差小于1 <mu>m。(2)X轴调零精度直接影响加工直径。(3)放电间隙随切削深度或放电容量的增加而增大。通过将偏移值设置为控制器存储器中的表格，可以减少这些影响。(4)工件材料的变化对加工精度影响不大。但是，加工时间和加工表面完整性受到影响。(5)利用这种方法加工的主轴，可以在各种材料上进行艾德电火花加工。(6)通过对X轴和Z轴的协调控制，可以加工出锥形主轴。最后，建立了一个四维控制的设备，并确认了形成poligon棒的可能性。