Каталог Iscar сверла ружейные и для глубокого сверления 2022 - страница 32

DEEP DRILLING - BTA SYSTEM Cutting speed: Vc (m/min) 110907050 Central Intermediate Peripheral USER GUIDE Chip Form General Information Chip form in deep hole drilling Table 1 Chip form plays a key role in STS (Single tube system) and DTS (Double tube system) while large-volume and high-pressure coolant do so as well. Because chips are removed through the tube with coolant, proper chip formation is essential for smooth and steady evacuation. 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. How to decide the chip form Generally the chip length should be 3 - 4 times its width, but tends to be longer with difficult-to-cut materials. In this case, chip evacuation can be 0.10 0.15 0.20 improved by making the chips thinner, which is Condition Feed: f (mm/rev) normally done by reducing the feed rate. From left to right in each box the order is central, intermediate and The graph below shows chip formation for different peripheral chip. cutting speeds and feeds. Short chips are created by reducing the cutting speed or increasing the feed. 216 ISCAR