端銑刀臨界磨耗之線上即時監控方法研究

Study of on-line monitoring method for critial wear of cutting tool

蘇聰(Tsong Su)

指導教授 ： 王世明

中原大學/工學院/機械工程研究所/碩士(2011年)

https://doi.org/10.6840/CYCU.2011.00108

摘要

切削加工機刀具磨耗的發生會影響加工精度與加工效率；如能及時分辦刀具切削時已達臨界磨耗並更換新刀具，可提升產線的良率與效率。本研究利用實驗分析法，分析因刀具磨耗而引起切削振動變化，進而提出線上偵測刀具臨界磨耗的診斷方法。研究中以切削軸向的振動為診斷訊號與門檻值比較，再利用FFT檢驗訊號的頻率特性，以確認刀具是否已屆臨界磨耗狀態。根據所建立的診斷法則，研究中利用LabView程式建立了具有有善人機介面的電腦輔助診斷系統。實削實驗結果證明該系統可有效診斷出臨界磨耗的發生並做停機控制，讓使用者能夠即時更換刀具。

關鍵字

線上監控 ； 診斷 ； 刀具磨耗

並列摘要

Serious wear of the cutter will result in poor machining accuracy and machining efficiency. It is very important to promptly know the cutter has been in a critical wear status and replace the cutter before the damage occurs on the workpiece. By using empirical method, an on-line diagnosis method for detecting the occurrence of critical wear of a cutter was proposed in this study. The variation trend of the cutting vibration caused by the cutter wear was analyzed and the threshold of detection was determined based on a lot of experiment data. In addition to check the variation of vibration, the Fast Fourier Transform method was also applied to check the frequency characteristics of the cutting vibration. Based on the developed detection algorithm, a computer assisted on-line critical-cutter-wear monitoring and control system was developed in LabView language. The verification experiment result has shown that the system can detect the occurrence of critical wear of cutter and instantly stop the machine for cutter replacement.

並列關鍵字

on-line monitoring ； diagnosis ； cutter wear

參考文獻

[16]羅明哲，“小波轉換於轉子故障與切削顫振偵測之應用”，私立中原大學機械工程研究所碩士論文 2001

[21]謝祥永，“切削顫振之順滑模式及遠端監控之研究”，私立中原大學機械工

[22]陳定國，“切削異常之線上診斷及控制系統之研究”，私立中原大學機械工程研究所碩士論文，2005。

[4]Babur Ozcelik，Mahmut Bayramoglu，“The statistical modeling of surface roughness in high-speed flat end milling“，International Journal of Machine Tools and Manufacture，Vol.46，pp.1395-1402，2006。

[5]Eckart Uhlmann，Sascha Piltz，Kai Schauer，“Micro milling of sintered tungsten-copper composite materials“，Journal of Materials Processing Technology，Vol.167，pp.402-407，2005。