Каталог Tungaloy глубокое сверление 2 - страница 26

Cutting speed: Vc (m/min) 110907050 Cutting condition and chip form Chip form in deep hole drilling How to decide the chip form Chip form plays a key role in STS (Single tube system) Generally, chip length should be 3 - 4 times its width, and DTS (Double tube system) while large-volume and but tends to be longer with difficult-to-cut materials. In high-pressure coolant do so as well. Because chips that case, chip evacuation will be improved by making are removed through the tube with coolant, proper chips thinner, usually by reducing the feed rate. chip formation is essential for smooth and steady The graph below shows chip formation for different evacuation. cutting speeds and feeds. Short chips are created by reducing the cutting speed or increasing the feed. Chip formation Chip formation is affected by multiple factors, such as workpiece material, chipbreaker geometry, cutting speed, feed, type of coolant, and coolant temperature. Suitable chip formation depends on cutting operation but is controllable by changing the cutting conditions. 0.10 0.15 0.20 Condition Feed: f (mm/rev) Workpiece material: Low alloy steel (AISI4340) 26 www.tungaloy.com