多軸加工機近年來受到工業界的高度重視，尤其在於模具曲面與航太零件加工上，不僅能達到快速、精密切削方式，且可降低工件夾持之定位誤差。然而，在一般加工流程中，規劃刀具路徑時，工程師往往未考慮到工件夾持之方位，故在刀具路徑產生後，須再考量工具機之行程及加工範圍是否可行。故在製造流程中，可提供CAPP工程師一客觀之評估系統，助於整個產品之開發成效。
本論文利用齊次座標轉換及工具機構形合成，建構出一可判斷工件最佳夾持方位及可使用之工具機構形系統。首先，針對三軸、四軸及五軸工具機合成出各種構形碼；接著，利用齊次座標轉換矩陣求得各軸數工具機之形狀創成函數矩陣；最後以逆向運動學求解出工具機各桿件之移動量，藉由輸入刀具路徑檔案判斷其可加工之工具機構形，並利用球座標系統對應至繞任意軸向旋轉之矩陣，將工件夾持方位改變，計算出最小之加工行程，藉以評估適合之構形。
本論文提出之可製造性評估，提供給CAPP工程師在刀具路徑規劃過程中使用，由系統中之功能，經夾持方位之改變，可避免在加工流程中之反覆回饋及修改，節省時間及成本；於工具機選擇方面更可提供最適合之構形考量。

Multi-axes machine tool plays an important role in manufacturing recently, especially in mold surface and aerospace product. It could not only be a rapid and accurate tool but also reduces errors in workpiece set-up. However, in general manufacturing processes, engineers are usually not able to determine the set-up orientation before planning of toolpath so must be considerated about the rotary and traverse range of machine tool after the toolpath has generated. If a system could used to help CAPP engineers to increase the efficiency of process development, the problem can be sloved.
In this research, homogeneous coordinate transformation and configuration synthesis are used to develop an evaluation system for choosing machine tool and workpiece set-up. First, the configurations of 3,4and 5-axis machine tools were synthesized afterward, a form-shaping function is used to construct its configuration. The last step is to solve for the movement of every component according to inverse kinematics, evaluation configuration by cutter location file, and modified workpiece orientation by using spherical coordinate correspond to homogeneous coordinate transformation matrix.
This thesis proposed a method of manufacturability evaluation to provide CAPP engineers in toolpath planning, It could reduce the time required for feedback which is determined by modifying workpiece orientation. The results of the proposed method may provide a recommended choise of configuration to the engineers.

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