Page 601 - Iscar
P. 601

USER GUIDE




            General - Calculations
                                -1
                Spindle Speed (min )         Power Requirement (kW)
                          vc •1000                     Q                  f    =  Feed/rev        mm/rev
                       n=   π • D               Pc=  60.000 • η  • kc • sin k  kc   =  Material specific
                Cutting Speed   (m/min)      Torque  (Nm)                         cutting force    N/mm 2
                                                                          h    =  Distance from drill
                          π • D • n                 f • kc  D 2                                                      SOLID CARBIDE DRILLS
                      vc =                     Mc=       •   • sin k•km           point to workpiece   mm
                            1000                   1000   8                       before feeding
                Table Feed (mm/min)          Feed Force (approx.) (N)     L    =  Depth of hole   mm
                                                                          C Mh   =  Cost/machine hour   $/h
                           vf = f • n          Ff = 0.63 •  D  •f•kc•sin k•kf  η   =  Machine efficiency   %
                                                        2                 k    =  90º   180° bottom drills
                                                                                     }
                Material Removal Rate (cm3/min)  Machining Time (min/piece)  sin k  =  1       DR...
                                                                                     }
                          vf • π • D 2                   L+h              k    =  70º   140° point angle drills
                       Q=                            Tc =                 sin k  =  0.94  SCD.., DCM.., DCN..
                            4000                          vf
                                                                          Drill Geometry Coeficient
                                             Machining Cost   ($/piece)        DCM     DCN     SCD
                                                                          km   1      0.85     0.85
                                                         CMh
                                                     Cc=  60  •Tc         kf   1      0.85     0.85
                Example                                                     k  Values
                                                                             c
                  Drill DR 220-044-25-07-2D-N (Ø22 mm)    k=90º; sin k=1     Material Group   kc Value
                  Material No. 4   kc=2200 N/mm    CMh=50 $/h   η=0.75            1 2           2000
                                         2
                                                                                                2100
                              vc=200 m/min   f=0.15 mm/rev   L=25 mm h=10 mm      3             2150
                              km=1 kf=1                                           4             2200
                                                                                  5             2200
                                                                                  6             2100
                  n= vc • 1000 =  200 •1000 =2894 min-1                           7             2100
                     π • D     π • 22                                             8             2100
                                                                                  9             2100
                                                                                  10            2500
                  vf = f • n=0.15 • 2894=434 mm/min                               11            3250
                                                                                                2300
                                                                                  12
                                                                                  13            2800
                                                                                  14            2600
                                             2
                             2
                  Q=  vf  • π  • D = 434 • 3.14 • (22) =165 cm3/min               15            1100
                          4000       4000                                         16            1300
                                                                                  17            1100
                                                                                  18            1800
                  Pc=   Q        • kc • sin k=    165    • 2200 • 1 =8.06 kW      19              900
                      60.000 • η           60.000 • 0.75                          20            1000
                                                                                  21              500
                                                                                  22              800
                             2
                  Mc=  f • kc  D  • sin k=  0.15 • 2200  •  222  • 1• 1=20 Nm     23              800
                      1000  •  8         1000      8                              26              700
                                                                                  27              700
                          D                   22                                  28            1700
                  Ff=0.63 •  • f • kc • sin k= 0.63 •  •0.15 • 2200 •1• 1=2286 N  31            3000
                          2                   2                                   32            3100
                                                                                  33            3300
                                                                                  34            3300
                  Tc = L+h =  25+10 = 0.08 min/piece                              35            3200
                     vf      434                                                  36            1700
                                                                                  37            1700
                                                                                  38            4600
                  Cc=  CMh •Tc = 50 • 0.08  =0.067 $/piece                        39            4700
                       60          60                                             40            4600
                                                                                  4 1           4500
                For material groups, see pages 1008-1043
            GYRO    Auxiliary Devices for Lathe Machines
                Designed to Correct Misalignment on Stationary Operation
                         T.I.R. max. 0.02
                                                         • Drills can be used on sloped surfaces up to 6°. When drilling
                                                          sloped surfaces of more than 6°, reduce feed by 30-50%
                                                          during penetration of up to 5 mm depth; or use a spot or
                                                          pre-hole drill to avoid drill deviation or poor drill performance.



                            Angular Adj. 1°

                                Radial Adj. D2.0




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