Каталог Iscar токарные пластины ISO 2022 - страница 122

ISOTURN INSERTS Cutting Force USER GUIDE Edge Preparation and Recommended Applications T-Land Sizes for Standard Items Silicon Nitride for Cast Iron and High Temperature Alloys Grade T (mm) a° IN22 0.20 25° What is ISCANITE? IN23 0.20 25° ISCANITE is a cutting tool material containing over 90 percent silicon nitride. ISCANITE is produced by IS80 0.20 25° unique hot pressing methods to achieve full density, IS8 0.20 25° and provides superior toughness along with high IS9 0.10 25° thermal-shock resistance. These characteristics make IN11 0.20 20° ISCANITE an ideal cutting tool material with impact resistance near that of coated carbides, and the heat IB50 0.14 20° and wear resistance of aluminum-oxide ceramics. IB55 0.14 20° IB85 0.14 20° Which material can ISCANITE machine? ISCANITE is primarily used on cast iron and high IB90 0.14 20° temperature alloys, brass and composites. Steel IS6 0.20 25° is the only material usually avoided because IW7 0.10 25° of various chemical incompatibilities. IN420 0.2 25° ISCANITE Benefits sharp For finishing and ISCANITE will increase your productivity, reduce super finishing your machining costs and can drastically reduce tool forces. ISCANITE increases productivity through F additional metal removal rates and can fully utilize the machine’s potential. Machining costs are reduced with increased tool life, along with less downtime for indexing, gauging, and adjustments. r0.03-0.04 For semi-finishing andfinishing f < 0.2 mm/revCutting Speed and Cutting Force It is preferable to machine at higher cutting speeds and E lower cutting forces (Point A is preferred over Point B.) In this case, pressure is reduced on the workpiece and any tendency of the workpiece to move or vibrate. If the available machine power is higher, or the machine can T For semi-roughing and be stepped up, the use higher cutting speedsroughing f > 0.2 mm/revof 750 m/min is possible, with the same cutting α° force as at Point B. (See Point C.) The positive T influence of the cutting speed and feed on machining conditions: higher cutting speeds are recommended and possible for silicon nitride inserts. T For heavy roughing and fc(N) interrupted cutting 6000 α° r0.03-0.04 S 5000 4000 75kW 3000 C B 37kW 2000 18.75kW 7.5kW 1000 A Vc 0 150 300 450 600 750 900 1050 1200 1350 1500 (m/min) Cutting Speed 242 ISCAR