臺灣博碩士論文加值系統

近年來，由於機械行業的迅速發展，精密加工、超精密加工等相關技術也日
益被廣泛應用，對生產效率、材料移除率、加工精度、自動化程度等的要求也隨之提高。而加工過程中常因不當的切削力激發刀具和工件強烈的相對振動，產生
自激式顫振現象，影響加工精度、工件表面粗糙度，刀具及工具機的壽命..等。
一般對於切削顫振的主要研究可分二類：第一類為以離線的切削穩定耳垂圖(SLD)
，求出穩定切削的極限切深，預測並避免加工中產生顫振。第二類為線上回饋控制，透過感測器將量測訊號經過控制演算後，以改變機台的主軸與進給系統參數
進行顫振抑制，本論文以｢主軸轉速選擇法｣Spindle Speed Selection(SSS)進行
線上顫振抑制的控制效能研究與分析。
本研究分為三個部分，一是以再生式顫振理論與系統動態響應方程式建立切削穩定圖，二為利用Labview建立切削顫振的檢測方法，三為利用台達Remote
API 建立控制器參數的讀取與寫入。系統包含了顫振檢測以及主軸轉速的調整方法，利用文獻所提出的方法進行顫振控制效果的驗證。
在實驗中發現若顫振的相位0.5<v<1(π<Φ<2π)時在論文中所使用的方法皆
能抑制顫振，而在論文中的案例有v<0.5的情形，此時只有令v=0.25有較佳的效
果，另外的方法無法有效的抑制顫振，可得知對於此實驗當中v0.25的方法對於
顫振的抑制效果較佳。

In recent years, due to fast development in machinery industry, precision processing and ultra-precision processing related technologies were widely applied, and requirements on production efficiency, material removal rate, processing precision and level of automation were accordingly enhanced. However, during the processing process, inappropriate cutting force usually urged strong relative vibration between the cutter and work object, which in turn generated self-excited chatter to affect processing precision, surface roughness of work object and the lifetime of cutter and cutter machine, etc. Generally, study on cutting chatter can be divided into two types: The first type was to use offline cutting Stability Lobe Diagram (SLD) to find out the limited cutting depth of stable cutting, which could be used to predict and prevent chatter generated in the processing. The second type was online feedback control, through the sensor, the measured signal was conducted with control algorithm, then the machine’s spindle and feeding system parameters were changed for chatter inhibition. In this paper, “Spindle Speed Selection(SSS)” was used to conduct the efficiency study and analysis of online chatter inhibition control.

This study can be divided into three parts, in the first part, regenerative chatter theory and system dynamic response equation were used to set up cutting stability lobe diagram, in the second part, Labview was used to set up the detection method of cutting chatter, in the third part, Delta Remote API was used to set up the read-in and write-in of controller parameter. The system includes chatter detection and adjustment method for the spindle speed, through the method proposed in the literature, verification on the chatter control effect was conducted.

In the experiment, it was found that when the phase of chatter was 0.5<v<1(π<Φ<2π), then all the methods used in the paper can have chatter inhibition effect; however, in the paper, there was one case with v<0.5, at this moment, only when =0.25 had better effect, other methods cannot inhibit chatter effectively, it can be seen that in the experiment,v=0.25 method had better inhibition effect on the chatter.

摘要..............................................I
致謝..............................................V
目錄..............................................VI
表目錄............................................VIII
圖目錄.............................................IX
第一章 緒論..........................................1
1.1 研究背景與動機..............................1
1.2 文獻回顧...................................3
1.3 研究目的...................................9
1.4 論文架構...................................9
第二章 切削顫振理論...................................10
2.1 顫振模式分類...............................10
2.1.1 強迫式振動.............................10
2.1.2 再生式振動.............................11
2.2 再生式顫振數學模型建立.......................12
2.2.1 切削系統方程式建立......................12
2.2.2 系統特徵方程式推導......................13
2.2.3 系統極圖(Polar Plot)推導...............16
2.3 系統穩定性圖...............................20
第三章 主軸轉速調整方法推導............................26
3.1 系統振動頻率與相位差關係.....................26
3.2 主軸轉速調整方法............................30
3.3 主軸轉速調整方法(2).........................31
第四章 實驗設備與方法..................................33
4.1 實驗設備...................................33
4.2 實驗設備架構................................36
4.3 線上顫振監測程式.............................38
4.4 實驗方法...................................39
第五章 實驗結果與討論...................................41
5.1 實驗結果....................................41
5.2 低、中、高轉速調整效果比較.....................48
5.3 主軸轉速調整速度比較..........................61
第六章 結論...........................................64
文獻回顧..............................................66

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