318 Каталог KYOCERA 2016 Фрезы со сменными режущими пластинами для металлообработки Стр.R24

Каталог KYOCERA 2016 Инструмент фрезерный с СРП по металлу Стр. R24 0318 ENG Lab2u

TECHNICAL TROUBLESHOOTING R24 Cutting Edges Figuration and Countermeasures Typical Cutting Edge Figuration Nose Wear Notching Crater Wear Plastic Deformation Crack from Wear Chipping Crack from Welding or Built-up Edge Mechanical Fracture Fracture from Thermal Crack Flaking Observation Causes Countermeasures Deterioration of surface roughness and dimensional accuracy Too high Vc End of tool life Reduce Vc Change to higher wear resistant grade Burr formation Cutting force increase Too high f and Vc Sharper cutting performance Reduce Vc Change to higher heat resistant grade Chip control deterioration Surface finish deterioration (peeled surface) Too high Vc Reduce Vc Change to high speed type like Cermet or Al2O3 coated insert Workpiece dimension’s change Crack at nose Too high cutting load Inappropriate tool grade Change to harder grade Reduce f and ap Surface finish’s sudden deterioration Workpiece dimension changes Too high Vc Reduce the pre-set tool life Change to higher wear resistant grade Cutting force increase Surface roughness deterioration Too high f Chattering Lack of insert toughness Reduce f and ap Change to more rigid toolholder Change to tougher grade Surface finish deterioration Cutting force increase Too low Vc Increase Vc Improve sharp cutting performance (rake angle, chamfer) Sudden cracking Unstable tool life Too high f and ap Chattering Change to tougher grade Enlarge chamfer Enlarge Corner-R(r) Change to more rigid toolholder Cracking by heat cycle Possible in interrupted cutting and milling Too high Vc and f Reduce f Reduce Vc Change to dry cutting Possible in high-hardness material cutting Possible in machining with chattering Lack of insert toughness Lack of toolholder’s rigidity Change to harder grade (TiC-base ceramic to CBN.) Change to more rigid toolholder Change edge preparation Kyocera