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研究生:郭彥宏
研究生(外文):Kuo,Yenhung
論文名稱:槍鑽鑽桿內孔型態對振動和不穩定性影響之研究
論文名稱(外文):Study on Effects of Gundrill Shaft Hole Types on Vibration and Instability
指導教授:鄭正德
指導教授(外文):Jeng,Jangder
口試委員:鄭正德徐榮昌邱仕堂
口試委員(外文):Jeng,JangderHsu,JungchangChiou,Sutang
口試日期:2012-06-28
學位類別:碩士
校院名稱:國立聯合大學
系所名稱:機械工程學系碩士班
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:90
中文關鍵詞:槍鑽假設模態法特徵值問題挫屈力
外文關鍵詞:GundrillAssumed mode methodEigenvalue problemBuckling force
相關次數:
  • 被引用被引用:1
  • 點閱點閱:174
  • 評分評分:
  • 下載下載:43
  • 收藏至我的研究室書目清單書目收藏:0
提升鑽削精度為深孔加工重要的課題,而槍鑽加工為深孔加工重要加工方式之一,本研究即是針對不同鑽桿斷面內孔型態及槍鑽系統參數對系統振動特性與穩定性之影響分析,此分析模型包含槍鑽系統一些重要參數,如鑽桿轉速、鑽削軸向力、冷卻液流速和鑽桿中間支撐等。槍鑽鑽桿運動方程是利用歐拉-柏努利樑理論推導,且應用假設模態法將槍鑽鑽桿系統運動方程式轉換成一特徵值問題形式,並求解系統自然頻率和挫屈力。本研究應用SolidWorks軟體建構槍鑽鑽桿三維實體,並轉換圖檔格式至ANSYS有限元素分析軟體進行分析,探討鑽桿斷面不同內孔型態,對鑽桿自然振動頻率及挫屈力之影響,藉由理論和有限元素分析,能深入瞭解槍鑽鑽桿系統的穩定性,分析結果顯示鑽桿斷面扇形內孔型態較半月形內孔型態有較佳剛性,且可增加鑽桿承受較大挫屈力,此有助於鑽削之穩定性,本研究分析結果可提供業界製造槍鑽刀具之參考。
The high-precision quality of deep-hole drilling process is an important issue, and the gundrill processing is one of the deep hole machining types. In this study, the vibration and stability of the gundrill tool shaft for various inner hole types and the gun drill system parameters are investigated. The model includes important properties of gundrill tool and the drilling operations, such as spinning speed, axial thrust force, velocity of conveying fluid and position of intermediate support, etc. The motion equations of gundrill tool system are derived by using the Euler-Bernoulli beam theory. Applying the assumed mode method to establish the transfer matrix, the equations of motion can be transformed into the forms of eigenvalue problem to solve the system natural frequency and buckling force. Further, 3D model of the gundrill tool is constructed with SolidWorks software, and the drawing format file is converted to the ANSYS finite element analysis software. For various inner hole types, the effects of the natural frequency and the buckling force on the gundrill tool are investigated. By both theoretical analysis and the finite element software, it can clearly understand the stability of the gundrill tool system. The results showed that the rigidity of the fan-shaped inner hole cross-section is better than the half-moon inner hole cross-section, and increase tool shaft to withstand buckling force. It is helpful for the stability of the gundrill tool. The results of the analysis can provide the design of the gundrill tool manufacturing.
摘要
Abstract
致謝
目錄
表目錄
圖目錄
符號說明
第一章 緒論
1-1深孔加工發展概況
1-2研究動機與目的
1-3深孔加工系統種類
1-4文獻回顧
第二章 槍鑽鑽桿系統理論模型
2-1座標系統
2-2假設模態法
2-3系統邊界條件設定
2-4定義矩陣型式
2-5Lagrangian能量法之應用
2-6系統運動方程式
2-7系統自然頻率響應求解
2-8系統挫屈力求解
第三章 ANSYS分析鑽桿自然頻率與挫屈力
3-1前處理
3-2求解
3-3後處理
第四章 結果與討論
4-1不同鑽桿內孔型態對自然頻率的影響
4-2不同鑽桿內孔型態對挫屈力的影響
4-3支撐位置對自然頻率的影響
4-4支撐位置對挫屈力的影響
4-5轉速對自然頻率的影響
4-6轉速對挫屈力的影響
4-7冷卻液流速對自然頻率的影響
4-8冷卻液流速對挫屈力的影響
4-9槍鑽鑽桿網格收斂分析
4-10 ANSYS槍鑽鑽桿自然頻率分析
4-11 ANSYS槍鑽鑽桿挫屈力分析
4-12槍鑽鑽桿理論解與ANSYS解之比較
第五章 結論與未來研究方向
5-1結論
5-2未來研究方向

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