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題名 | 高速加工之最適化進給率探討=Investigation of the Optimal Feed Rate for High Speed Machining |
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作 者 | 張惠欽; | 書刊名 | 德霖學報 |
卷期 | 27 2014.01[民103.01] |
頁次 | 頁69-88 |
分類號 | 446.893 |
關鍵詞 | 逆向位移法; 高速加工; 進給率; 切削力; Inverse offset method; High speed machining; Feed rate; Cutting force; |
語文 | 中文(Chinese) |
中文摘要 | 傳統NC 加工是以固定的進給率進行材料的移除,由於所移除的體積及刀具的受力並非固定,因此 銑刀容易因劇烈的負載而撓曲,影響加工精度與品質。本文先以逆向位移法來進行中加工與精加工的刀 具路徑規劃,接著再分別對中加工與精加工提出不同的進給率調整的方法;中加工時藉由切削力與進給 率的數學關係來調整進給率,使切削力量維持在適合的範圍內,刀具承受的負載不致於變化太大,而精 加工時,以等體積移除率的觀念,藉由曲面的曲率來估計各個加工點體積,藉以改善固定進給率進行NC 加工所產生的缺點,以最適化其加工進給率。 |
英文摘要 | Traditional machining of sculptured surfaces removes metal material with a fixed feed rate. Due to abrupt cutting forces during the machining processes, cutting tools tend to be damaged, influencing the precision and quality of machined parts. This research using inverse offset method to plan cutting path, and proposing the methodology to adjust feed rates for semi-roughing and finish machining operations. For the process of semi-roughing, the relationship of cutting force and feed rate is studied to keep cutting force maintaining in an appropriate range; thus the cutting force on tools will not change so abruptly. In finish machining operations, the maintenance of constant material removal rate is the core concept. The volume on each point to be machined is estimated based on the curvature of the point and the results are used to adjust the feed rates. So that the machining of sculptured surfaces adjusts feed rate automatically, improving the defects resulted from NC machining with a fixed feed rate. |
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