Internal Grooving Toolholders 1(: KGDI Stable Machining with Excellent Chip Control and Smooth Chip Evacuation 1 Point Excellent Chip Control with GMI Chipbreaker for Internal Grooving Evenly breaks chips in various cutting conditions with newly designed chipbreaker geometry. Good chip control even in finishing applications with small depths of cut. Rear ramp Center geometry squeezes chips and prevents Comparison of Chip Control (Internal evaluation) supports chip deformation. chip clogging during high feed machining. GMI Chipbreaker Competitor A Conventional product F G Smooth chip control with stable chip shape compared with Competitor A and Conventional F. Prevents frequent machine stops caused by tangled chips. Corner design stabilizes chip shape Front design stabilizes Cutting Conditions : Vc=100m/min, f=0.07mm/rev Toolholder : KGDIR3225B-3 during finishing and improves chip chip shape during low Insert : GDM3015N-040GMI Workpiece Material : SCr420 breaking performance. feed machining. Grooving 2 Point Smooth Chip Evacuation by Creating Chip Pocket Smooth chip evacuation when grooving and finishing. Cutting Conditions :Vc=100m/min 5.4 External (1) : ap=3mm, (2)(3) : ap=1mm, (4)(5) : ap=0.2mm f=0.08mm/rev Toolholder : KGDIR3225B-3 Internal Insert : GDM3015N-040GMI 6.0 Workpiece Material : SCM415 Face Residual Chips (Internal evaluation) 60 Prevents Rate[%] 50 Chip (5) (2) (1) (3) (4) φ33 Clogging 25 40 Residual 30 DOWN 20 Improved chip evacuation by innovation chip pockets 10 0 KGDI Competitor B Competitor C Chips remaining in machined bore were greatly reduced compared with Competitor B and C. 3 Point Low Cutting Forces and Stable Machining GMI chipbreaker prevents chip clogging and reduces cutting forces. Comparison of Cutting force (Internal evaluation) GMI Chipbreaker 1,200 1,500 Stable machining ■ ■ Resultant force ■ ■ Principal force ■ ■ Thrust force force[N] with few changes in cutting force. 1,000 1,000 15% DOWN Cutting 500 force[N] 800 0 0 0.5 1 1.5 2 2.5 Cutting 600 Cutting Time[sec] Competitor D 400 1,500 Cutting force[N] Instantaneous increase of cutting force 1,000 due to clogged chips. 200 500 0 GMI Chipbreaker Competitor D 0 Cutting Conditions : Vc=150m/min, f=0.1mm/rev 0 0.5 1 1.5 2 2.5 Toolholder : KGDIR3225B-3 Insert : GDM3015N-040GMI Cutting Time[sec] Workpiece Material : SCM415 G58