Function of each cutting edge angle in face milling Axial Rake Angle GAMP Determines chip disposal direction Positive Excellent machinability Radia

Function of each cutting edge angle in face milling Axial Rake Angle GAMP Determines chip disposal direction Positive Excellent machinability Radia

Function of each cutting edge angle in face milling Axial Rake Angle GAMP Determines chip disposal direction. Positive Excellent machinability. Radial Rake Angle GAMF Determines sharpness. Negative Excellent chip disposal. Corner Angle KAPR Determines chip thickness. Large Thin chips and small cutting impact. Large back force. True Rake Angle T Determines actual sharpness. Positive (large) Excellent machinability. Minimal welding. Negative (large) Poor machinability. Strong cutting edge. Cutting Edge Inclination Determines chip disposal direction. Positive (large) Excellent chip disposal. Low cutting edge strength. STANDARD INSERTS Positive and Negative Rake Angle Standard Cutting Edge Shape Negative Rake Angle Neutral Rake Angle 0 Positive Rake Angle (+) Insert shape whose cutting edge precedes is a positive rake angle. Insert shape whose cutting edge follows is a negative rake angle. CORNER ANGLE (KAPR) AND CUTTING CHARACTERISTICS SE300 Type 400 Type SE415 Type 515 Type SE445 Type 545 Type 3000 2500 2000 1500 1000 500 0 -500 Comer Angle 0 Comer Angle 15 Comer Angle 45 Principal y Force rf - o Feed Force 0.1 0.2 0.3 Principal P Force cj - z Feed Force Back Force Principal Force y n - U Feed Force L Back Force Back Force fz (mm tooth) 0.1 0.2 0.3 fz (mm tooth) 0.1 0.2 0.3 fz (mm tooth) Workpiece JIS SCM440 (281HB) Tool o125mm Single Insert Cutting Conditions vc125.6m/min ap4mm ae110mm Cutting Resistance Comparison between Different Insert Shapes Principal Force Back Force Corner Angle 0 Corner Angle 15 Back force is in the minus direction. Lifts the workpiece when workpiece clamp rigidity is low. Comer angle 15 is recommended for face milling of workpieces with low rigidity such as thin workpieces. Corner Angle The largest back force. 45' Bends thin workpieces and lowers cutting accuracy. Prevents workpiece edge chipping when cast iron cutting. Corner Angle 45 Three Cutting Resistance Forces in Milling Principal force Force is in the opposite direction of face milling rotation. Back force Force that pushes in the axial direction. Feed force Force is in the feed direction and is caused by table feed. Q013 TECHNICAL DATA Cutting Resistance (N) FUNCTION OF TOOL FEATURES FOR FACE MILLING Corner Angle (KAPR) jgi Ra e Angle (GAMP) Main Cutting Edge Cutting Edge True Rake Angle (T) Radial Rake Angle (GAMF) H Each Cutting Edge Angle in Face Milling Type of Angle Symbol Function Effect