Каталог Iscar токарный инструмент 2017 - страница 350

USER GUIDE GROOVE-TURN Finishing Operation: Diameter Compensation A compensation factor for the final diameter must be used in the final machining operation. ØD2 After the initial grooving to the required final diameter, ØD1 ØD2 ØD1 the machining direction is normally changed for A Δ/2 longitudinal turning. At this point the deflection occurs. If machining continues without correction, corner A will penetrate the material. This will result in two different diameters: øD1 from the grooving and øD2 from the turning. The difference between øD1 and øD2 is a value we define as ∆. ap The compensation factor is ∆/2, as shown below. ∆ øD1-øD2 = 1 2 2 Using the compensation factor will eliminate the small surface Δ/2 step. Follow this simple procedure during machining: 1. Groove to the final diameter 2. Pull the tool back, a distance equal to the value of ∆/2 3. Continue the finish turning operation 2 Characteristic values of ∆ are shown in the diagrams on the next page. 3 Characteristic Values of ∆ The diagrams show experimental results for Insert: GIP 3.00E-0.4 specific machining conditions. These are sample Toolholder: GHDR 25-3 values that will vary with different workpiece 0.24 materials and different holder types. 0.20 ap=3 mm Diameter Compensation ap=2 mm 0.16 Factor ∆ mm 0.12 ap=1 mm 0.08 Measure the ∆ value for your finishing operation in ap=0.5 mm a short test using your selected finishing conditions. 0.04 Do not run your test using the final diameter. 0 0.1 0.2 0.3 0.4 0.5 0.6 Feed f (mm/rev) Insert: GIP 4.00E-0.4 Insert: GIP 6.00E-0.8 Toolholder: GHDR 25-4 Toolholder: GHDR 25-5 0.24 0.24 ap=4 mm 0.20 0.20 Diameter Compensation ap=3 mm ap=4 mm 0.16 0.16 Factor ∆ mm Diameter Compensation 0.12 0.12 ap=2 mm ap=3 mm 0.08 0.08 Factor ∆ mm ap=2 mm 0.04 0.04 ap=1 mm ap=1 mm 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.1 0.2 0.3 0.4 0.5 0.6 Feed f (mm/rev) Feed f (mm/rev) 346 ISCAR