銑刀磨耗係影響產品良率之重要因素，其中銑刀端面直接與加工件表面接觸，對於成品表面精度影響極大，故需要可靠的銑刀端面磨耗檢測方法，最大化刀具價值。現今業界檢測主要依靠師傅判斷將刀具分類，然此辨別方式存在人為誤差、無法有效判斷刀具失效類型、量化磨耗程度及人工檢測耗時等問題，亦使刀具所佔之加工成本難以降低。故本研究期望能建立銑刀磨耗檢測系統，利用正弦條紋結構光投影搭配四步相移法，計算刀具表面形貌產生之相位移，並根據相位移及物體高度之關係，重建銑刀端面三維影像。
本研究利用解析度測定圖驗證系統平面解析度為6.69 μm及影像解析度為4.34 μm。利用DMD模擬物體高度產生的相位移動，得到系統可解析之最小深度約為11.7 μm，而重建高度的標準誤差於X與Y軸方向分別為4.3 μm與12.7 μm。本系統量測範圍達10.1 mm×4.1 mm，足以覆蓋直徑12 mm銑刀端面上的單一刃面，並根據重建結果分析銑刀的失效類型，以及取得刀面磨耗量。

Tool wear is an important factor affecting the yield of the product. The end face of the milling tool is directly in contact with the surface of the workpiece, which has a great influence on the surface precision of the finished product. Therefore, a reliable tool wear detection method is needed to maximize the tool value. Nowadays, the industry's testing mainly relies on the master's judgment to classify the tools. However, there is human error in the identification method, the inability to effectively judge the type of tool failure, the degree of quantitative wear and the time required for manual detection, etc. Therefore, the processing cost of the tool is difficult to reduce. This study hopes to establish a milling tool wear detection system, using the sinusoidal stripe structure light combined with the four-step phase shift method to calculate the phase displacement generated by the tool surface topography, and reconstruct the three-dimensional end face of the milling tool according to the relation between phase shift and the height of the object.
The lateral resolution of the proposed system is 6.69 μm and pixel resolution is 4.34 μm by using the 1951 USAF resolution test chart. U The phase shift is simulated by DMD to obtain the minimum depth is 11.7 μm, and the standard error of the reconstruction height is 4.3 μm and 12.7 μm in the X and Y-axis directions, respectively. The measurement range is 10.1 mm × 4.1 mm, which is enough to cover the single blade surface on the end face of the 12 mm diameter milling tool. The failure type of the milling tool can be analyzed according to the reconstruction result and to obtain the quantified cutter wear.

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