On-line Estimation of Workpiece Height in WEDM

摘要：

On-line estimation of workpiece height is essential for wire breaking prevention in WEDM process. In addition, it can provide the reference of machining parameters setting for increasing machining speed and stability. A new on-line WEDM workpiece height estimation system for the iso-energy type wire EDM machine is presented. The concept of specific discharge energy (SDE) is proposed, and a mathematical model relating workpiece height, machining speed and sparking frequency is derived. By assuming a linear discrete model between machining speed and sparking frequency, the workpiece height under a specific condition is estimated. The actual workpiece height is obtained by modifying the estimated value by a correction factor. Experimental results show that the system works satisfactorily. The estimation error of workpiece height is within 1 mm while the response time is less than 1 second in general.

关键词： Wire EDM Specific discharge energy On-line workpiece height identification

作者: Y. S. Liao T. J. Chuang Y. P. Yu

作者单位: Department of Mechanical Engineering, Taiwan University, Taipei 106, Taiwan Dept. of Mech. Eng. , Hwa Hsia Institute of Technology, Jhonghe City, Taipei 235, Taiwan

会议类型: 国际会议

会议名称: The 16th International Symposium on Electromachining(第16届国际电加工会议)

会议地点: 上海

会议语种:英文

页码: 255-260

在线出版日期: 2010-04-19（万方平台首次上网日期，不代表论文的发表时间）