Page 425 - ISCAR(TURNING-CATALOG-42-2022)
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USER GUIDE







              Finishing Operation: Diameter Compensation        Characteristic Values of ∆                            GROOVE-TURN
              A compensation factor for the final diameter must   The diagrams show experimental results for
              be used in the final machining operation.         specific machining conditions. These are sample
              After the initial grooving to the required final diameter, the   values that will vary with different workpiece
              machining direction is normally changed for longitudinal   materials and different holder types.
              turning. At this point the deflection occurs. If machining   Measure the ∆ value for your finishing operation in a short test
              continues without correction, corner A will penetrate   using your selected finishing conditions. Do not run your test
              the material. This will result in two different diameters:   using the final diameter.
              øD1 from the grooving and øD2 from the turning. The
              difference between øD1 and øD2 is a value we define as
              ∆. The compensation factor is ∆/2, as shown below.  Insert: GIP 4.00E-0.4
                                                                Toolholder: GHDR 25-4
              ∆   øD 1 -øD 2                                             0.24
              2  =        2                                              0.20            ap=4Êmm


              Using the compensation factor will eliminate               0.16                  ap=3Êmm
              the small surface step. Follow this simple
              procedure during machining:                         Diameter Compensation   Factor ∆ mm  0.12  ap=2Êmm
            1 Groove to the final diameter                               0.08
            2 Pull the tool back, a distance equal to the value of ∆/2   0.04            ap=1Êmm
            3 Continue the finish turning operation                        0
                                                                               0.1  0.2  0.3  0.4  0.5  0.6
              Characteristic values of ∆ are shown in the diagrams.               Feed f (mm/rev)

                                                                Insert: GIP 3.00E-0.4
                                                                Toolholder: GHDR 25-3
                                 ØD2             ØD1
                    ØD2                                                  0.24
                  ØD1
                                                                 Diameter Compensation   Factor ∆ mm  0.12  ap=1Êmm
                                             Δ/2
                 A                                                       0.20       ap=3Êmm ap=2Êmm
                                                                         0.16
                                                                         0.08
                1           ap                                           0.04            ap=0.5Êmm                    TEXT
                                                                          0
                                                                               0.1  0.2  0.3  0.4  0.5  0.6
                                                                                  Feed f (mm/rev)

                                                                Insert: GIP 6.00E-0.8
                                                                Toolholder: GHDR 25-5
                2
                                           Δ/2                           0.24                ap=4Êmm
                                                                 Diameter Compensation   Factor ∆ mm  0.16  ap=3Êmm
                                                                         0.20

                                                                         0.12
                3                                                        0.08        ap=2Êmm
                                                                         0.04
                                                                          0
                                                                                           0.4
                                                                               0.1  0.2  0.3 ap=1Êmm  0.5  0.6
                                                                                  Feed f (mm/rev)


















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