Development of Simulator for Wire Electrical Discharge Machining

线切割放电加工模拟器的研制

基本信息

批准号：
14350067
负责人：
KUNIEDA Masanori
金额：
$ 4.1万
依托单位：
Tokyo University of Agriculture and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350067/
关键词：
Wire electrical discharge machining Simulation of machining accuracy Wire electrode vibration Process reaction force Discharge delay time Material removal rate Pattern searching method Discharge location

项目摘要

In this research, we developed a WEDM (Wire Electrical Discharge Machining) simulation method which can reproduce the discharge phenomena of WEDM on computer accurately. The simulation process consists of searching for discharge locations, removing the workpiece and analyzing wire vibration. Since unclarified parameters such as ignition delay time, explosive force, damping coefficient, and permittivity of dielectric in simulation are difficult to measure from experiments, they were obtained by solving the reverse problem using parametric programming. With the parametric programming method, optimum parameters for simulation were searched simultaneously to minimize differences between simulation results and experimental results.In order to evaluate the simulation accuracy, simulation of finish cutting was performed using the parameters identified. It was found that high precision simulation of finish cutting can be realized with the simulation error less than 1.5μm.or the next step, simulation program for rough cutting was developed. Shapes of straight grooves and right angled grooves were cut, and then simulation results were compared with the experimental results. Changes in the straightness of both frontal and lateral surfaces of the grooves and the width of the grooves were investigated by increasing the feed rate and wire electrode tension. The results of simulation coincided qualitatively with the experimental results.

在这项研究中，我们开发了一种WEDM（电线电气排放加工）模拟方法，该方法可以准确地在计算机上重现Wedm的放电现象。模拟过程包括寻找排放位置，删除工作场所并进行了分析。由于未划出的参数，例如点火延迟时间，爆炸力，阻尼系数和饮食中的介电常数，在模拟中很难从实验中进行测量，因此它们是通过使用参数编程解决反向问题来获得的。使用参数编程方法，同时搜索了用于模拟的最佳参数，以最大程度地减少仿真结果和实验结果之间的差异。在评估模拟精度时，使用已确定的参数进行了切割的模拟。发现可以使用小于1.5μm的模拟误差或下一步，开发了用于粗糙切割的仿真程序的仿真误差可以实现高精度模拟。切割直凹槽和直角凹槽的形状，然后将模拟结果与实验结果进行比较。通过增加进料速率和电线电极张力，研究了凹槽的正面和侧面表面的直率变化以及凹槽的宽度。模拟的结果与实验结果恰恰相同。