台灣鈷領產品型錄

15 45° 74° 53° GTC milling strategies Angle of engagement The angle of engagement inscribes the cutting range of the tool from start of chip formation to exit from the material. With these parameters the stress impacting on the tool can be assessed. With straight milling paths the angle is constant, with concave milling paths it increases and with convex milling paths it decreases. Straight milling path • constant angle of engagement • constant tool stress Example: a e 0.20 x D = 53º engagement Engagement remains a constant 53º Angle of engagement with convex contour radii Convex milling path • decreasing angle of engagement • reduced tool stress Example: a e 0.20 x D = 53º engagement Engagement reduces to 45º Measures: a e may be increased f z can be increased Angle of engagement with concave contour radii Concave milling path • increasing angle of engagement • increased tool stress Example: a e 0.20 x D = 53º engagement Engagement increases to 74º Measures: a e must be reduced f z must be reduced in radius a e 0.20 x D a e 0.20 x D a e 0.20 x D Influence on process through tool engagement 16 刀具切削與工件的接觸嚙合角度對加工過程的影響 外凸形繞銑嚙合角度變化 內凹形繞銑嚙合角度變化 切削嚙合角度 嚙合角度確定了從切屑形成開始到從退出材料時刀具的切削範圍。 利用這些參數，可以評估影響刀具的受力。在直線銑削路徑中，角度是恆定的； 在凹形銑削路徑中，角度是逐漸增大的；而在凸形銑削路徑中，角度則是減小。 外凸形繞銑路徑 嚙合角度減少 刀具的受力減少 直線銑削路徑 嚙合角度固定 刀具的受力固定 切寬 ae 0.2D=53° 嚙合角 53° 固定的嚙合角度 嚙合角度減少至 45° 調整方式 切寬 ae 及每刃進給 fz 可以增加 側銑切削嚙合角度從 53° 降低至 45° ( 切寬 ae 及 每刃進給 fz 可以增加 ) 側銑切削嚙合角度固定在 53° 側銑切削嚙合角度從 53° 增加至 74° ( 切寬 ae 及每刃進給 fz 必須減少 ) 切寬 ae 0.2D ＝ 53° 嚙合角 內凹形繞銑路徑 嚙合角度增加 刀具的受力增加 嚙合角度增加至 74° 調整措施 切寬 ae 及每刃進給 fz 必須減少 切寬 ae 0.2D ＝ 53° 嚙合角