KYOCERA UNIMERCO—Page 264

KYOCERA UNIMERCOBoring Inside the workpiece Dynamic Bar Toolholder design developed by using stress analysis technology Maximum structural thickness for high toolholder rigidity Controls chattering to achieve stable machining Large chip pocket produces superior chip evacuation F  Superior chip evacuation (External coolant) Dynamic Bar Competitor A Competitor B In the products of competitor A and B chips remain inside the workpiece, but chips from the Dynamic Bar are all evacuated from the workpiece. Dynamic design by using the latest computer simulation technology Chip evacuation direction  Comparison of pocket length Pocket length  Chip evacuation direction SCLC(P) type STLB(P) type Description Pocket length (mm) Dynamic Bar Competitor A A16-SCLPR09-18 type 37 29 A20-SCLCR09-22 type 48 32 Better evacuation by backward chip flow The Dynamic Bar achieves superior chip evacuation High rigidity and chattering resistance are ensured by using a special alloy and with help of stress analysis technology.  Comparison of vibration tendency （L/D） Good <Cutting Conditions> SCM415 5.5 Vc=150m/min 5.0 ap=0.5mm 5 4.5 f=0.1mm/rev S16-SCLPR09 type 4 CPMH090304L-Y 3 2 1 Dynamic Bar AE type Competitor A Competitor B Maximum toolholder overhang length (L/D)  Comparison of surface finish Vibration of the Dynamic Bar was minimal even at high cutting speeds, enabling stable machining. Surface wall Dynamic Bar Ra=0.4µm Rz=2.3µm Competitor A Ra=0.6µm Rz=3.6µm Competitor B Ra=3.4µm Rz=14.0µm <Cutting Conditions> SCM415 Vc=210m/min ap=0.5mm f=0.1mm/rev A16Q-SCLPR09-18 type CPMT090304XP(PV7020) L/D=4 External coolant Direction of vibration measurement Surface waveform Roughness Oscillatory F2Page 263Page 265