Краткий справочник по резанию материалов на металлообрабатывающих станках TECHNICAL DATA

Краткий справочник по резанию материалов на металлообрабатывающих станках TECHNICAL DATA

Краткий справочник по резанию материалов на металлообрабатывающих станках TECHNICAL DATA _ TECHNIC EFFECTS OF CUTTING CONDITIONS FOR TURNING EFFECTS OF CUTTING CONDITIONS Ideal conditions for cutting are short cutting time, long tool life, and high cutting accuracy. In order to obtain these conditions, selection of efficient cutting conditions and tools, based on work material, hardness, shape and machine capability is necessary. CUTTING SPEED Cutting speed effects tool life greatly. Increasing cutting speed increases cutting temperature and results in shortening tool life. Cutting speed varies depending on the type and hardness of the work material. Selecting a tool grade suitable for the cutting speed is necessary. E J o 0) to a. tn O) c 35 o 500 400 300 200 100 Workpiece JIS S45C 180HB Tool Life Standard VB = 0.3mm UE6105 MC6025 Feed 0.3mm/rev Holder: PCLNR2525M12 Insert: CNMG120408 Dry Cutting MC6015 MP3025 NX3035 MC6035 VP15TF I I I l 10 20 30 40 50 Tool Life (min) P Class Grade Tool Life 60 70 80 90 100 £ a w Ui c 33 o 500 400 300 200 150 100 80 MC7015 Workpiece JIS SUS304 200HB Tool Life Standard VB 0.3mm Depth of Cut: 1.5mm Feed: 0.3mm/rev Holder: PCLNR2525M12 Insert: CNMG120408-MA Dry Cutting 10 20 30 40 Tool Life (min) M Class Grade Tool Life 60 100 a tn O) c 33 3 o 500 400 300 200 150 100 80 MC5005 MC5015 10 Workpiece JIS FC300 180HB Tool Life Standard VB = 0.3mm Depth of Cut: 1.5mm Feed 0.3mm/rev Holder: PCLNR2525M12 Insert: CNMG120408 Dry Cutting 20 30 40 Tool Life (min) K Class Grade Tool Life 60 100 Effects of Cutting Speed 1. Increasing cutting speed by 20% decreases tool life by 50%. Increasing cutting speed by 50% decreases tool life by 80%. 2. Cutting at low cutting speed (20-40m/min) tends to cause chattering. Thus, tool life is shortened. 1974 Mitsubishi Materials