Общий каталог Mitsubishi 2020 - 2021 - страница 1739

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TECHNICAL DATA FORMULAS FOR FACE MILLING y CUTTING SPEED (vc) vc = ) • DC • n12 (SFM) vc (SFM) : Cutting Speed)(3.14): Pi DC (inch) : Cutter Diametern(min-1) : Main Axis Spindle Speed (Problem) What is the cutting speed when main axis spindle speed is 350 min-1 and cutter diameter is & 5" ? (Answer) Substitute ) 3.14, DC= 5", n= 350 into the formula. vc =) • DC 12 • n = 3.14×5"×35012 = 457.9 SFM DC The answer is 457.9 SFM. y FEED PER TOOTH (fz) fz = vfz•n(IPT) fz (IPT) : Feed per Tooth z : Insert Numbervf(IPM): Table Feed per Min.n(min-1): Main Axis Spindle Speed (Feed per Revolution fr = z × fz) (Problem) What is the feed per tooth when the main axis spindle speed is 500 min-1, insert number is 10, and table feed is 20 IPM ? Feed (Answer) Substitute the above figures into the formula. Direction fz = Vf z×n = 2010×500= .004 IPT Wiper Edge Angle The answer is .004 IPT. Feed per Tooth Tooth Mark y TABLE FEED (vf) vf (IPM) : Table Feed per Min. vf = fz • z • n (IPM) fz (IPT) : Feed per Tooth z : Insert Number n (min-1) : Main Axis Spindle Speed (Problem) What is the table feed when feed per tooth is .004 IPT, with 10 inserts and main axis spindle speed is 500 min-1? (Answer) Substitute the above figures into the formula. vf = fz × z × n = .004 IPT×10 ×500 = 20 IPM The answer is 20 IPM. y CUTTING TIME (Tc) Tc = Lvf (min) Tc (min) : Cutting Timevf (IPM): Table Feed per Min.L(inch): Total Table Feed Length (Work material Length(l)+ Cutter Diameter(DC)) (Problem) What is the cutting time required for finishing 4" width and 12" length surface of a cast iron (AISI No 30 B) block when cutter diameter is & 8", the number of inserts is 16, the cutting speed is 410 SFM, and feed per tooth is .01". (spindle speed is 200 min-1) DCP IL (Answer) Calculate table feed per min vf=.01×16 ×200=32 IPMCalculate total table feed length. L=12+8=20 inch Substitute the above answers into the formula. Tc = 2032 = 0.625 (min) 0.625 × 60 = 37.5 (sec.) The answer is 37.5 sec. P024 TECHNICAL DATA