Основной каталог Kyocera 2016-2017 - страница 575

 Comparison of Hole Dia. (f=0.3mm/rev) 1) Comparison with indexable drill 2) Comparison with carbide solid drill 14.03 14.03 Diameter of outlet side (mm) 1,060 holes 1,060 holes (Kyocera) (Kyocera) 14.02 Diameter of outlet side (mm) 14.02 300 holes (Competitor C) 14.01 940 holes 14.01 (Competitor F) 720 holes (Competitor B) 14.00 14.00 140 holes (Competitor N) 13.99 13.99 0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70 Cutting Time (min) (Internal evaluation) Cutting Time (min) (Internal evaluation) 　　　 Q&A Q-3 Drilling deep hole machining using DRC (8D type), dimension variation of diameters has occurred at inlet and far (outlet) side possibly due to deflection. Is there any countermeasure? A-3 There are some countermeasures as follows to prevent deflection (to improve bite of drill). Countermeasures 1 • Increasing the feed rate Increasing the feed rate may keep the processing diameters constant. 14.4 DRC I14-8D (Estimated rate: Current rate + 0.03 to 0.05 mm/rev) 14.3 Drill Dia. (mm) f=0.25mm/rev 14.2 S55C Vc=80m/min H=112mm 14.1 f=0.30mm/rev f=0.25mm/rev→0.30mm/rev 14.0 Wet (Internal coolant) 13.9 112 K SS16-DRC140M-8 0 20 40 60 80 100 120 DC1400M-SC (PR0315) Drilling Depth H (mm) If increasing the feed rate is not possible because rigidity of machine or clamp is weak. Countermeasures 2 Drilling • Make a center spot 1) Make a center spot using the DRC drill or a commercially available center drill which has a vertex angle of about 140°. (If the center drill can be modified, make its vertex angle larger than 140°) 2) Then drill the hole using the DRC drill (8D type). DRC DRC DRC I14-8D I14-3D I14-8D 14.4 S55C Vc=80m/min 14.3 0.5Dｃ or more f=0.25mm/rev H=112mm (mm) Without spot drilling Wet (Internal coolant) 14.2 More than Dia. half of the SS16-DRC140M-3 14.1 With spot drilling Drill Dia. SS16-DRC140M-8 Drill 112 112 14.0 DC1400M-SC (PR0315) 13.9 0 20 40 60 80 100 120 Drilling Depth H (mm)  Case Studies S5 0C SCM440 ·Flange ·Housing ·Vc=97m/min (n=2,490min-1) ·Vc=83m/min (n=2,400min-1) ·H=32mm ·H=32mm φ11 ·f=0.3mm/rev ·f=0.24mm/rev (Vf=747mm/min) (Vf=576mm/min) ·Wet (Internal coolant) φ12.5 32 ·Wet (Internal coolant) ·DC1250M-SC (PR0315) ·DC1100M-SC (PR0315) 32 SS14-DRC120M-3 3,000 holes/insert SS12-DRC110M-3 2,400 holes/insert Competitor A 1,800 holes/drill Competitor B 2,000 holes/drill Compared to competitor's drill A, MagicDrill DRC type has reduced burr and reduced more than 10% Compared to competitor's solid drill B, MagicDrill DRC type has greatly reduced preparation time of the power required. with its easy insert replacement feature. Tool life has also improved greatly. Also, the costs of spare tools for re-grinding has been reduced, and tool life has improved. (Evaluation by the user) (Evaluation by the user) K33