1276 Каталог KORLOY 2020 Инструмент и оснастка для станков по металлу Стр.L16

Каталог KORLOY 2020 Инструмент для станков по металлу Стр. L16 1276 Lab2u

Turning Nose-R Affects 1. Big Nose-R improves surface finish 2. Big Nose-R improves cutting edge strength 3. Big Nose-R reduces flank wear and crater wear 4. Too big Nose-R causes chattering due to increased cutting force Selection system 1. For finishing with small depth of cut/long and thin workpiece/ When machine power is low - Small Nose-R 2. For applications that need strong cutting edge such as intermittent and machining mill scale/For roughing of big workpiece/When the machine power is strong eough - Big Nose-R Relationship between nose radius, feed and various surface roughness O Cutting edge shape and the affects Rake angle ( a) Rake angle has big influence on cutting force, chip flow and tool life Affects 1. High rake angle results in good suface finish 2. As the rake angle increases by 1° Machining power decreases by 1%. 3. High rake angle weakens cutting edge Selection system 1. For hard workpiece/For applications that need strong cutting edge such as interrupted and machining mill scale - Low rake angle 2. For soft workpiece/Easy to cut material/When the rigidity of machine power and workpiece is low - High rake angle Principal force (kg) Feed force (kg) Technical Information 16