以隱函數形式表示的柱形曲面五軸加工

機械論文編號:JX750  論文字數:19095.頁數:52   附程序

目     錄
摘     要 I
Abstract II
第一章   緒論 1
1.1概述 1
  1.2 國內外現狀 2
1.3研究內容 3
1.4 研究目標    3
1.5 應用前景 3
 第二章   四軸和五軸數控銑床介紹 5
2.1 雙轉臺機床 5
2.2 四坐標數控銑床與加工中心 7
2.3 五坐標數控銑床與加工中心 8
2.4 五軸數控聯動 9
2.5 兩軸數控旋轉銑頭 12
 第三章  曲面加工的加工刀具及加工方式 14
3.1用球頭刀加工曲面 14
3.2用圓柱銑刀或圓錐銑刀加工曲面 15
3.3 圓環銑刀加工曲面 16
 第四章  切觸概念淺釋 17
4.1 切觸（高階接觸）概念 17
4.2 切觸（高階接觸）的含義深入解釋 19
4.3 數控機床切觸原理 21
 第五章   橢圓柱面曲面加工 24
5.1三坐標加工 24
5.2四坐標加工 27
5.3五坐標加工 29
第六章  程序及數據 31
6.1  Visual Basic 6.0的使用 31
6.2程序 32
第七章 三坐標曲面加工刀具軌跡計算 38
7.1  刀位計算 38
7.2刀具軌跡的生成方法 39
7.3走刀步長的確定 41
7.4走刀行距的確定 42
第八章 結論 45
致  謝 46
參考文獻 47
附錄  48

摘     要
    五軸數控加工技術在近年來發展相當快，特別是對復雜曲面的加工起到了不可替代的作用。工程中有很多復雜柱面，采用5坐標加工可高效達到所需形狀，通過對柱面微分方程的推導，探索了加工刀具時線與線之間局部切觸的基本理論，并詳細探討了刀具在此條件下的坐標定位問題。但是該技術在全球范圍內一直沒有得到普及，文章分析了目前五軸數控技術在全球范圍內普遍存在的、難以解決的問題 ,分析了機床工業市場對五軸數控機床的需求以及發展五軸數控技術的必要性 ,并對其應用作出了展望。
 將切觸（高階接觸）原理應用于曲面加工，如取接觸線就沿刀具直母線，則刀具直母線應沿被加工面的漸近方向。對不可展直紋面，直紋線上每點的法矢方向不同，而圓柱直母線上每點線法矢方向相同，故有可能發生過切。按切觸原理，可確定當接觸線不沿刀具直母線時，刀具的最佳姿態。并按2階切觸原理，確定刀具的最佳姿態和最佳接觸方向。可做到曲面2階展開和3階接觸。
 
關鍵詞： 復雜曲面   圓柱銑刀   切觸   微分方程   五坐標

Implicit Function in the form of five-axis
machining of cylindrical surfaces
                      Abstract     Five-axis CNC machining technology in the development of a fairly rapid pace in recent years, especially for complex surface machining has played an irreplaceable role .   There are a lot of the complexity of the project cylinders, 5-coordinate high-performance processing can achieve the required shape, through the cylinder differential equation is derived to explore the processing line and the line when the tool between the local shear of the basic theory of touch, and dwelt at length on the tool Under these conditions the problem of the coordinates. But the technology at the global level has not been universal, the article analyzes the current five-axis CNC technology at the global level are preva lent, and difficult to resolve the problem, an analysis of the market's five-axis machine tool industry the demand for CNC machine tools and the development of five -axis CNC technology, the need for, and made the prospect of their application.     To touch (high-contact) principle applies to surface processing, such as from contact with the tool along the straight line on the bus, the bus should be along the straight tool is processed surface of the asymptotic direction. Exhibition of non-ruled surface, ruled line of the normal vector of each point in different directions, and the Spur Line bus every point the same direction as normal vector, so it may have been cut.In accordance with the principle of touch to determine when the contact line is not along the straight generatrix tool, the tool the best posture. Touch and 2-order theory, the best tool to determine the best exposure to posture and direction. 2-order surfaces can be carried out and 3-order contact.
.Key words：cylindrical  surface complex  five-axis   milling touch