需要金幣： 1000 個金幣 |
資料包括：完整論文，任務書 |  |
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| 轉換比率：金額 X 10=金幣數(shù)量， 例100元=1000金幣 | 論文字數(shù)：42頁 |  | |
| 折扣與優(yōu)惠：團購最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Adobe Reader格式(*.pdf) |  |
摘要 超硬質工具加工技術已經(jīng)有了一段比較長時間的歷史，其中多以金剛石加工技術為主要研究對象。金剛石具有許多優(yōu)異的性能 ,硬度高 ,耐磨性好 ,化學性能穩(wěn)定。因此 ,它是一種非常有用的工業(yè)材料。它可以用于汽車航空航天，石油、地質、機械、電纜等行業(yè)中 ,用它制成的刀具壽命通常比硬質合金刀具高100 倍 ,具有很高的經(jīng)濟價值。 針對圓弧形金剛石砂輪精密修整的操作困難和裝置復雜的問題，提出一種新的數(shù)控對磨成形修整方法。在該成形修整中，金剛石砂輪被驅動沿著圓弧插補運動軌跡與GC 磨石對磨，逐漸形成砂輪的圓弧形輪廓，用于超硬材料的曲面磨削。在建立砂輪圓弧形輪廓的數(shù)控修整模式的基礎上，分析定位誤差與修整形狀偏差的關系。此外，建立修整精度和修整率的評價指標，進行正交試驗，研究修整工藝參數(shù)，即砂輪轉速、行走速率和進給深度，對修整精度和修整率的影響。在該數(shù)控對磨成形修整中不同半徑的砂輪圓弧形輪廓能夠被修整成形，可用于不同曲率的曲面磨削，從而研究出砂輪在加工過程中的精確行走軌跡路徑。通過MATLAB軟件程序設計，利用離散法將自由曲面進行離散并可視化，也可以將砂輪行走軌跡編成數(shù)控磨床可使用的G 代碼。這種方法可以大幅度節(jié)約自由曲面的加工路徑的設計時間和降低實驗加工成本。 關鍵詞：超硬質工具加工，金剛石加工，MATLAB 軟件程序設計，離散法，G 代碼
Abstract Diamond processing technology of quality tools has quite a long time history,mostly diamond processing technology as the main object of study.Diamond has many high-performance, high hardness, abrasion resistance, and chemical properties and stability. So, it is a very useful industrial materials. It could be used in automotive to aerospace, petroleum, geology, machinery, cable and other industries, The tool life is 100 time bigger than carbide tool, so it has high economic value. Due to the operation difficulty and equipment complexity of precision form truing shaped diamond grinding wheel，a new NC mutual—weal form truing was proposed．In this form truing，wheel is driven along arc interpolation path to grind GC stone and then arc—shaped wheel profile is gradually formed．It is used for curve grinding of super-hard materials．On the base of establishing control mode of formation radius of arc—shaped diamond grinding wheel，effect of wheel position error relative to GC stone was analyzed on form of trued arc—shaped profile of grinding wheel．In addition, evaluation indexes of truing accuracy and truing ratio were intruded，and then truing accuracy and truing ratio were investigated by orthogonal lest with reference to wheel rotate speed, moving speed and depth of cut. The dressing on the grinding wheel with different radius arc-shape contour can be trimmed, can be used for different curvature of the surface grinding. To work out the exact trajectory of path during the wheel processing. Designed by MATLAB software program, using the discrete method to discretize the free surface and visual, can also be compiled into CNC grinding wheel by using G-code, This approach can significantly save the processing path of free-form surface design time and reduce processing cost experiment. Keyword: diamond grinding wheel, Diamond processing, MATLAB software program,discrete method, G-code
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