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題名 | 線切割放電加工工件厚度之線上估測=On-Line Estimation of Workpiece Height in WEDM |
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作者姓名(中文) | 廖運炫; 余永平; | 書刊名 | 國立臺灣大學工程學刊 |
卷期 | 82 2001.06[民90.06] |
頁次 | 頁13-20 |
分類號 | 446.893 |
關鍵詞 | 線切割放電加工; 比放電能; 厚度鑑別係數; 線上工作厚度估測; Wire electrical discharge machine; Specific discharge energy; Thickness identification coefficient; On-line workpiece height identification; |
語文 | 中文(Chinese) |
中文摘要 | 線切割放電加工線上工件厚度估測,不但可以抑制斷線,且可以提供加工參數設定的參考,以提高加工速度與加工穩定度,本文利用比放電能(Specific Discharge Energy) 的觀念,並配合加工速度與放電頻率間一階線性分離模式的關係,推導出工件厚度、加工速度與放電頻率間之數學模式,實際的工件厚度是將模式所估測出的工件厚度乘一修正因子而得,最後針對等能量線切割放電加工機建立一新的線上厚度估測系統,實驗證明所建構的厚度估測系統在加工有段差的工件時,能準確且快速的估測工件厚度,厚度估測的誤差為1mm ,反應時間在1sec 以內。 |
英文摘要 | On-line estimation of workpiece height is essential for wire rupture 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 1mm while the response time is less than 1 second in general. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。