刃口積屑監控方法BUILD UP EDGE MONITORING METHOD

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

13/455,446

專利證號

US 9,008,816 B2

專利獲證名稱

刃口積屑監控方法BUILD UP EDGE MONITORING METHOD

專利所屬機關 (申請機關)

中原大學

獲證日期

2015/04/14

技術說明

一種刃口積屑監控方法，可對CNC加工發生之切削刃口等積屑異常進行線上即時偵測與抑制。該方法採用訊號變化特徵分析法及快速傅立葉轉換法來進行訊號分析，針對切削刃口積屑制定診斷法則，以提高切削異常診斷效率與可靠度。其主要以擷取即時振動加速度訊號，過濾切刃通過頻率1.1倍以上之振動訊號，比對振動加速度是否有突增現象，及以快速傅立葉轉換分析當下振動訊號之主振動頻率是否符合刃口積屑特性頻率之方式，來決定是否發生積屑，並傳送停機指令予電腦數值控制器(CNC控制器)，以進行停機。 A build up edge monitoring method is provided for performing online real-time detection and suppression of abnormal build up edges of cutters occurred in a CNC manufacturing process. Signal variation analysis and fast Fourier transform are used for analyzing signals and establishing an algorithm of diagnosing build up edges to improve the efficiency and reliability of the cutting abnormality diagnostics. A vibration acceleration signal is captured and filtered to a frequency exceeding 1.1 times of a blade passing frequency, and an occurrence of accumulated chips is determined according to a sudden increase of the vibration acceleration and whether the main vibration frequency of the current vibration signal determined by a fast Fourier transform analysis matches with the frequency of the build up edge characteristic, and a shutdown instruction is issued to a CNC controller to shut down a cutting machine.

備註

本部(收文號1110014155)同意該校111年3月11日原產字第1110000834號函申請終止維護專利(中原大學)

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