1774 Каталог MITSUBISHI 2020 Режущий инструмент Фрезы Резцы Сверла Пластины Стр.R022

Каталог MITSUBISHI 2020 Режущий инструмент для станков Стр. R022 1774 Lab2u

TECHNICAL DATA FUNCTION OF TOOL FEATURES FOR FACE MILLING FUNCTION OF EACH CUTTING EDGE ANGLE IN FACE MILLING Each Cutting Edge Angle in Face Milling Type of Angle Symbol Function Effect Axial Rake Angle GAMP Determines chip disposal direction. Positive : Excellent machinability. Radial Rake Angle GAMF Determines sharpness. Negative: Excellent chip disposal. Lead Angle KAPR Determines chip thickness. Small: Thin chips and small cutting impact. Large back force. True Rake Angle GAMO Determines actual sharpness. Positive (large): Excellent machinability. Minimal welding. Negative (large): Poor machinability. Stronq cuttinq edqe. Cutting Edge Inclination LAMS 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 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. Standard Cutting Edge Combinations Axial Rake Angle (GAMP) Radial Rake Angle (GAMF) Insert Used Steel Cast Iron Aluminium Alloy Dlfficult-to-Cut Material (+) Axial Rake Angle Radial Rake Angle Double Positive (DP Edge Type) Positive (+) Positive (+) Positive Insert (One Sided Use) -) Axial Rake Angle ial Rake Angle Double Negative (DN Edge Type) Negative (-) Negative (-) Negative Insert (Double Sided Use) (+) Axial Rake Angle Radial Rake Angle Negative/Positive (NP Edge Type) Positive (+) Negative (-) Positive Insert (One Sided Use) ILEAD ANGLE (KAPR) AND CUTTING CHARACTERISTICS 2 3000 2500 2000 1500 a. 1000 O C 500 “ 0 o -500 Lead Angle: 90° Lead Angle: 75° 0.1 0.2 0.3 fz (mm/t.) Lead Angle: 45° Back Force J I l 0.1 0.2 0.3 fz (mm/t.) Workpiece : JIS SCM440 (281 HB) Tool: 0125mm Single Insert Cutting Conditions : vc=125.6m/min ap=4mm ae=110mm Cutting Resistance Comparison between Different Insert Shapes Back Force Principal Force Lead Angie Back force is in the minus O' direction. Lifts the workpiece when workpiece clamp rigidity is low. Lead Angle Lead angle 75° is recommended for 1 CO face milling of workpieces with low ' rigidity such as thin workpieces. Lead Angle The largest back force. Bends thin workpieces and lowers cutting accuracy. Prevents workpiece edge chipping when cast iron cutting. 45' Lead 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. R022