Kyocera - Основной каталог 2010-2011 ENG

                                                    для заказа - kyocera@kyocera-tools.ru

                Troubleshooting

                Cutting Edges Figuration and Countermeasures

                   Typical Cutting Edge Figuration  Observation                 Causes                                Countermeasures
                Nose Wear
                                                    • Deterioration of surface  • Too high Vc                  • Reduce Vc
                                                     roughness and dimen-       • End of tool life             • Change to higher wear resistant
                                                     sional accuracy
                                                                                                                grade

                                                    • Burr formation            • Too high f and Vc            • Sharper cutting performance
                                                    • Cutting force increase                                   • Reduce Vc
                                                                                                               • Change to higher heat resistant
                  Notching                          • Chip control deterioration • Too high Vc
                Crater Wear                         • Surface nish deteriora-                                  grade

                                                     tion (peeled surface)                                     • Reduce Vc
                                                                                                               • Change to high speed type like

                                                                                                                Cermet or Al2O3 coated insert

                                                    • Workpiece dimension’s     • Too high cutting load        • Change to harder grade
                                                     change
                      Plastic                                                   • Inappropriate tool grade • Reduce f and ap
                   Deformation                      • Crack at nose

                Crack from Wear                     • Surface nish’s sudden    • Too high Vc                  • Reduce the pre-set tool life
                                                     deterioration                                             • Change to higher wear resistant

                                                    • Workpiece dimension                                       grade

                                                    • Cutting force increase • Too high f                      • Reduce f and ap

                                                    • Surface roughness dete- • Chattering                     • Change to more rigid toolholder

                Chipping                            rioration                   • Lack of insert toughness • Change to tougher grade

                            Crack from              • Surface nish deterioration • Too low Vc                 • Increase Vc
                              Welding               • Cutting force increase                                   • Improve sharp cutting perform-
                                   or
                                                                                                                ance (rake angle, chamfer)
                           Built-up Edge
                                                    • Sudden cracking           • Too high f and ap            • Change to tougher grade
              R                                     • Unstable tool life        • Chattering                   • Enlarge chamfer
                                                                                                               • Enlarge Corner-R(r)
Technical                   Mechanical              • Cracking by heat cycle    • Too high Vc and f            • Change to more rigid toolholder
   Information                Fracture              • Possible in interrupted
                                                                                                               • Reduce f
                           Fracture from             cutting and milling                                       • Reduce Vc
                          Thermal Crack                                                                        • Change to dry cutting

                               Flaking              • Possible in high-hard-    • Lack of insert toughness     • Change to harder grade
                                                     ness material cutting      • Lack of toolholder’s rigid-   (TiC-base ceramic to CBN.)

                                                    • Possible in machining      ity                           • Change to more rigid toolholder
                                                     with chattering                                           • Change edge preparation

R24                                                 kyocera@kyocera-tools.ru
                                                       www.kyocera-tools.ru