Общий каталог Tungaloy 2020 - 2021 - страница 230

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NegativePositivePCD / CBN Number of machined partsMax. flank wear width Cutting speed Vc (m/min) Cutting speed Vc (m/min)VBmax (mm) Cutting speed Vc (m/min) Number of machine parts (pcs.) Cutting speed Vc (m/min) Cutting speed Vc (m/min) Number of passes Te c h n i c a l Guide T-CBN series for sintered metal ᭿ Application area ᭹ Valve seat ᭹ Valve seat BX470 ᭹ Ferrous Sintered metal (Plunge cutting) (Traverse cutting) Priority on burr prevention 300 120 120 and surface finish 100 100 BX480 BX470 Priority on wear resistance BX480 BX470 BX330 and versatility 150 BX470 50 50 SMF40X0 series material (JPMA standard) 0 0 0 55 60 65 300 300 Hardness of workpiece material (HRC) Hardness of workpiece material (Hv) Hardness of workpiece material (Hv) Features of ᭹ Machining of sintered metal with hard particles ᭹ Features of BX470 and BX480 BX470 and BX480 Conventional grade BX470 / BX480 CBN content: 95 vol% Hv = 4100 ~ 4300 Hard particle Binder CBN grain The world highest CBN content as Binder phase are selectively worn away by hard particles. By increasing CBN content, wear of binder layer is suppressed. a commercially available material. e Wear proceeds with falling-out of CBN grains, eImproved wear resistance ᭿ BX480 (Facing of gears) ■ BX470 / BX480 Tool failure after machining sintered metal ■ BX470 (Tool life criterion: Burr occurrence) 300 600 Vc = 250 m / min 250 200 400 150 Vc = 120 m / min 100 ConventionalPCBN grade BX480 200 50 After machining After machining150 pcs.300 pcs. 0 0 Conventional grade BX480 BX470 BX480 Competitor A Competitor B Cutting conditions Cutting conditions Cutting conditions ᭹ Workpiece material: Sintered metal (> HRA60) ᭹ Workpiece material: Sintered metal (> HRA60), Nitriding, ᭹ Workpiece material: Ferrous Sintered metal ᭹ Insert: DCMW11T308 Hard particles included ᭹ Cutting speed: Vc = 100 m/min ᭹ Depth of cut: ap = 0.2 ~ 0.5 mm ᭹ Cutting speed: Vc = 110 m/min ᭹ Depth of cut: ap = 0.15 mm ᭹ Depth of cut: ap = 0.15 ~ 0.3 mm ᭹ Feed : f = 0.07 mm/rev ᭹ Feed: f = 0.1 mm/rev ᭹ Coolant : Water soluble type ᭹ Feed: f = 0.07 ~ 0.25 mm/rev ᭹ Coolant : Water soluble type ᭹ Interrupted cutting ᭹ Dry and interrupted cutting ᭹ Interrupted cutting T-CBN series for grey cast iron and ductile cast iron ᭿ Application area ᭹ FC Solid coated T-CBN grades ᭹FC and FCA (JIS) ᭹FCD (JIS) BX930 Area for 1500 · General purpose, first choice finishing Area for roughing BX9301000 grade.· Dedicated grade for machiningductile Cast iron 1500 BXC90 Ceramic grades BXC90(FX105) BX480 BX480 1000 Conventional · One-piece solidstructure 500 · Suitable for interrupted PCBN · Applicable for small BX930 machining· Excellent fracture resistance 500 grades to large depths of cut T515 (Coated carbide) Continuous Interrupted FCD400 FCD700 0 1.0 2.0 3.0 4.0 Depth of cut (mm) ■ Machining of cylinder liners (Machining example of BX910) ■ Tool life comparison in machining of disc brakes ᭹Wear width after machining ᭹Tool failure after machining 120 pcs.120 pcs. 2000 BXC90 0.5 1600 0.4 BX910 Competitor 1200 Ceramic 0.3 Cutting conditions 800 Cutting conditions᭹ Workpiece material: Disc rotor 0.20.10 ᭹ Workpiece material: (JIS FC250)Cylinder liner (Spin casting)Machining type: Finish boring400᭹ Insert: SNGN 120412 BXC90᭹ Depth of cut: ap = 0.7 mm᭹ Cutting speed: Vc = 1,000 m/min᭹ Machine: Special purpose machine᭹ Feed: f= 0.35 mm/rev0300500᭹ Coolant: Dry8001000᭹ Tool life criterion: BX910 Competitor ᭹ Coolant: Wet Cutting speed: Vc (m/min) Conditions of finished surface BX910 For machining cylinder liners B198 www.tungaloy.com