Основной каталог Kyocera 2021 - 2022 - страница 486

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Grooving φ24 φ35 φ73 φ38 φ54 External grooving GDM/GDMS/GDGS type Guide for external grooving Point 1 - Turning after grooving 1. Grooving depth over 0.5 mm: For roughing - refer to fig. 1 Before turning, pull the tool back about 0.1mm after grooving, instead of turning subsequent to grooving. Failure to pull the tool back before traverse machining will result in an unbalanced load applied on only one side of the cutting edge. 2. Grooving depth under 0.5 mm: For finishing - refer to fig. 2 Turning subsequent to grooving is possible because shallow groove depths relate a small load on the cutting edge. Retention time is not necessary. Point 2 1. When widening the groove width (Refer to Fig.3), apply the "Step Turning." G 2. The widened groove and side walls should be finished last. For better chip control, ap over 0.5 mm is recommended. Note: If theworkpiece is not supported at the center, reduce the feed rate when grooving towards center. 0.1mm Fig.1 Fig. 2 Fig. 3 Before turning, pull the tool back Turning subsequent to grooving. about 0.1 mm after grooving. Grooving depth under 0.5 mm: At Grooving depth over finishing 0.5 mm: At roughing Case Studies SCr420H (Grooving) SCM420 (Grooving / Turning) Gear 10 Gear Vc = 113~164 m/min Vc = 170 m/min f = 0.06 mm/rev f = 0.15 mm/rev (Roughing) Wet (3)(2)(1)(4) 0.10 mm/rev (Finishing) GDM4020N-040GM ap = 0.2 mm (Finishing) (PR1225) Wet KGDL2525X-3T10S GDM4020N-040GM (PR1215) KGDR2525X-4T20S GM chipbreaker GM chipbreaker (PR1225) 1,500 pcs/c (PR1215) 250 pcs/c Competitor K Competitor L (Roughing: 250 pcs/c PVD coated carbide; 200 pcs/c (PVD coated carbide) Finishing: cermet) • GM chipbreaker (PR1225) showed 6 times longer tool life than that of Competitor K. • GM chipbreaker reduced occurrence rate of tangle of chips (occurrence • Good chip control without burned chips. rate 80% to 10%). The problem was persistent with Competitor L. • Machining productivity is improved. GM chipbreaker Competitor K GM Chipbreaker (Finishing) Competitor L (Finishing) Smooth chip control Chips easily tangled Evaluation by the user Evaluation by the user G32