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ノンプロセス機能制御による走行ワイヤ工具の開発と複合精密加工への応用

使用非过程功能控制的走线工具的开发及其在复杂精密加工中的应用

基本信息

批准号：
10555044
负责人：
MOHRI Naotake
金额：
$ 7.87万
依托单位：
The University of Tokyo (2000)Toyota Technological Institute (1998-1999)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

项目摘要

The purpose of this study is to develop a multi-functional system whose operation is based on the WEDM(Wire Electrical Discharge Machining)method. Since wires have long feeding paths that can be readily available for machining, the wire characteristics can be manipulated by surface treatment on the path. Therefore, the requirement to develop a multi-functional system using a wire with additional properties so that, better surface finishes in WEDM can be achieved. In this study, the basic machining method is WEDM as already mentioned. Grinding and surface treatment by EDM are additional functions that make the system multi-functional. The following procedure was followed :Firstly, for surface modification of the WED-machined surface, a wire coated with slurry containing titanium carbide powder suspended in glycerol, was used, to avoid mixing in hydrocarbon oil. Using this coated wire for surface modification by EDM, carbon steel surface, titanium carbide modified, was obtained on the same machine set-up. Using this process, carbon steel surface can be hardened over 1500 vickers hardness with 5 μm thickness modified layer.Secondary, for grinding the WED-machined surface, the wire is surface-treated by accretion EDM with titanium green compact in hydrocarbon oil so that, titanium carbide is accreted on the surface. A system was developed for grinding a rotating workpiece with the accreted wire. Using this wire for grinding carbon steel, a depth of cut of 15 μm and surface roughness of 0.7 μmR_a and 6 μmR_z were obtained.It was therefore possible, to use different machining methods with treated wire to machine WED-machined surfaces. Hence, the conclusion that this system can be applied to machining ; and precision elements such as gears, dies, and molds can be easily produced on this system.

本研究的目的是开发一种基于电火花线切割加工的多功能加工系统。由于焊丝具有易于加工的长进给路径，因此可以通过该路径上的表面处理来操纵焊丝特性。因此，需要开发一种多功能系统，使用具有附加性能的焊丝，以便在电火花线切割加工中获得更好的表面光洁度。在本研究中，基本的加工方法是如前所述的电火花线切割。电火花磨削和表面处理是使系统多功能的附加功能。首先，为了避免在碳氢化合物油中混入碳化钛粉末，用含有悬浮在甘油中的碳化钛粉末的浆料涂覆钢丝对楔加工表面进行表面改性。用该包覆丝进行电火花表面改性，在相同的机床装置上获得了碳钢表面碳化钛改性。采用该工艺，碳钢表面经5μm厚的改性层处理后，硬度可达1500维氏硬度以上。二次加工时，钢丝在碳氢化合物油中用钛绿压坯吸积电火花进行表面处理，表面生成碳化钛。研制了一套利用附着钢丝磨削回转体的系统。用该钢丝磨削碳钢，加工深度为15μm，表面粗糙度为0.7μmR_a和6μmR_z，为采用不同的加工方法加工楔形加工表面提供了可能。因此，该系统可以应用于机械加工，并且可以方便地加工齿轮、模具等精密零件。