1099 Каталог KORLOY 2016 Металлорежущий инструмент и станочная оснастка ENG Стр.L32

Каталог KORLOY 2016 Инструмент и оснастка Стр. L32 1099 ENG Lab2u

Drills Tool failures and solutions Solutions Cutting condition Tool shape Grade etc Trouble Causes Cutting speed Feed Step feed Initial feed Coolant Relief angle Point angle Thinning angle Honing Flute width rate Thinning Toughness Hardness Machine rigidity Machine vibration Guide bush Clamping workpiece Too sharp cutting edge (too big relief angle) (thinning edge is too sharp) 4 4 t t Chipping Excessive cutting speed 4 Built-up edge 4 4 t t Vibration and chattering 4 t 4 Excessive cutting speed (Abnormal wear at margin) 4 wear Insufficient cutting speed (Abnormal wear at center) t Long chip t t 4 Chip Over lap t t Chip burning t Tool clamping precision 4 4 4 t 4 Hole precision Burr, Poor surface finish Excessive teed, sharp point angle 4 t 4 Excessive cutting speed (Considered tool grade) t 4 t Breakage on Poor surface finish 4 Insufficient machine rigidity t Fracture contact Improper cutting condition t 4 Breakage at hole bottom Crooked hole t t 4 Chip clogging 4 t t Increase 4-: Decrease :use Correct use Technical Information 32