台灣鈷領產品型錄
14 P K H M S N GTC milling strategies Application parameters Low cutting width a e to 0.33 x D • low angle of engagement <70º • short time of contact between cutting edge and component Very high tooth feed f z • reduced chip thickness allows considerably higher f z Very high cutting speed v c • reduced heating up and prolonged cooling down allow very high v c values High cutting depth a p • improved leverage e ect • high metal removal rate • increase in contact points between tool and component Metal removal rate The metal removal rate specifies how high the actual chip removal is per minute. It is especially suitable for comparing di erent machining strategies. a p (mm) x a e (mm) x v f (m/min) = Q (cm 3 /min) Peripheral requirements Applicable in every material group • • easy to machine materials = increase in productivity • di cult to machine materials = increase in process reliability High-dynamic machining centres • short acceleration distances • higher speed range • small to medium tool diameters Heavy machines • stable feed axes • high spindle torque • medium to large tool diameters Unstable to stable workpiece clamping • stable = vibration-free machining = maximum metal removal rate • unstable = reduction of radial forces = increased process reliability Tool angle of engagement & tool contact time Foundations for economically e cient milling 經濟效益高的銑削加工基礎 加工參數應用 金屬移除率(單位時間內材料切除的體積) 低的切削寬度 ae 到 0.33x D 低切削嚙合角 <70° 切削刃與工件之間的接觸時間短 極高進給率 fz 非常高的切削速度 vc 高切削速度時減少加工時熱的產生、並延長冷卻時間 高切削深度 ap 改善槓桿效應 高金屬移除率 切屑厚度減少、可顯著提高 fz 周邊外圍需求的考量因素 增加刀具與零件之間的接觸點 刀具切削嚙合角度& 刀具接觸時間 金屬移除率是指每分鐘實際去除切屑的量,特別適合用於比較不同的加工策略。 切深 ap 切寬 ae 每分鐘進給 每分鐘移除量 cm 3 不穩定或是穩定的工件夾持狀況 • 穩定 = 無振動的加工 = 最大金屬去除率 • 不穩定 = 減少徑向力 = 提高加工過程穩定性 重型機器 • 穩定的進給軸向控制 • 高主軸扭力 • 盡量使用中大尺寸直徑刀具 高轉速加工中心機 • 加速距離短 • 更高的切削速度範圍 • 盡量使用小、中尺寸直徑的刀具 適用於每個物料群組 •P K H M S N • 容易加工的材料 = 提高生產率 • 難加工的材料 = 提高加工過程的穩定性 < 70º
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