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

USER GUIDE DEEP DRILLING - BTA SYSTEM Chip Form General Information Chip form in deep hole drilling Table 1 Chip form plays a key role in STS (Single tube system) Intermediate Peripheral and DTS (Double tube system) while large-volume and Central 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. 110 Chip formation Cutting speed: Vc (m/min) Chip formation is affected by multiple factors, such as workpiece material, chipbreaker geometry, cutting 90 speed, feed, type of coolant, and coolant temperature. Suitable chip formation depends on cutting operation but is controllable by changing the cutting conditions. 70 How to decide the chip form Generally the chip length should be 3 - 4 times 50 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 Condition improved by making the chips thinner, which is 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