Основной каталог Kyocera 2021 - 2022 - страница 980

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Milling h (Sinking depth) 35 80 Ball-nose / radius type cutters MRX Guide for pecking Depth of pecking X Refer to max. cutting depth (Pd) shown in the lower table of previous page. (Pd Shows the maximum plunge depth.) When traversing after pecking 1. Reduce the table feed by 50% until the center core part (do not forget to grind) is completely cut off. (The internal cutting edge's radial rake angle is large in the negative direction) 2. The min. cutting length “X” for flat bottom surface is as follows. Center core DC Guide for ramping (Slant milling) • Ramping angle should be RMPX (Maximum ramping angle) or under in the above cutting conditions. L • Feed rate should be 70% or under of the above cutting conditions. Formula of the cutting length “L” at max. ramping angle L= aptan RMPX RMPX ap Guide for helical milling • Sinking depth (h) per revolution when helical milling should be max. ap or under in the above cutting conditions.Ramping angle (with trajectory of the center line of tool) should be RMPX (Maximum [When cutting dia. øDh1≤øDh<øDh2] ramping angle) or under in the above cutting conditions.•Feed rate should be 70% or under of the above cutting conditions.•Down-cut machining is recommended.øDh Center core partremains after machining.(Not removable with the same cutter) Helical milling factors DC DC (Cutting dia.) [When cutting dia. øDh2≤øDh≤øDh3] øDh Center core part øDs (How to find diameter of trajectory remains after machining. of tool's center line) (Removable by traversing øDs (Diameter of trajectory of tool's center line) øDs=øDh-DC with the same cutter) M øDh (Machining da.) πxøDs Formula for sinking depth (h) DC α h=π x øDs x tan α Ramping angle (h should be ap or under) (α should be RMPX or under) Please refer to previous page the list for øDh1 ~ Dh3. Max. ap and usable edges (mm) Insert corner-R Usable edges R4 R5 R6 R8 3 edges ap=2.0~4.0 ap=2.5~5.0 ap=3.0~6.0 ap=4.0~8.0 6 edges ap=2.0 Less than ap=2.5 Less than ap=3.0 Less than ap=4.0 Less than Case studies SUS304 SKD61(47~49HRC) • Nozzle parts • Mold part Slant face • Vc = 113m/min • Vc = 125m/min • ap x ae = 1.0 x 65mm • ap x ae = 1.0~ • fz = 0.14mm/t 2.0x 10mm • Dry• MRX100R-12-9T-M 110 • fz = 0.25mm/t• Dry 380 230 (9 flutes) 65 • MRX20-S20-08-2T • RPGT1204M0ER-SM (2 flutes) (PR1535) 4.5 times longer • RDGT0803M0ER-GM More than double tool life (PR1525) tool life PR1535 450 pcs/edge PR1525 2 pcs and more Stable tool life Conventional 100 pcs/edge Conventional 1 pc unstable tool life • High cost efficiency with 4.5 times longer tool life and 1.5 times more insert edges. • MRX prevented burr formation and improved surface finish. • Conventional tool machined only 1 pc of workpiece due to unstable tool life, but MRX doubled the tool life with stable machining. (User evaluation) (User evaluation) M208