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

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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