Каталог Iscar дисковые фрезы и фрезерные пластины 2022 - страница 64

SLOTTING & SLITTING CUTTERS USER GUIDE Feed Direction Down (climb) milling is recommended. Up milling or plunging are possible. (In down milling or plunging, backlash should be eliminated.) Defining Actual Feed Chip thickness decreases as the depth of cut decreases. Therefore, recommended feed (fz) can be increased as shown in the table. T/D Increase 1/6 1/8 1/10 1/20 Vc recommendedfeed by15% 30% 45% 100% fz D Chip Formation in Slot Milling Chip shape is a function of the depth of cut. Down milling starts with large chip selection and exits with T=D/3 reduced chip selection. Down milling is recommended T=D/4 for improved tool life under stable conditions. T=D/10 Vf Chip Thickness as a Function of D.O.C. to Diameter Ratio Stacked Cutters(1) Insert Width and Possible Modification Milling Wider Slots with Two Stacked Cutters See sketches on next page 1 In accordance with the required width of cut (W1+W2), W A R ∆A max ∆S max choose the recommended SGSF cutter combination 2.40 2.40 0.16 0.33 — (A, B, or C) from the table on the next page. 3.00 2.40 0.20 0.24 0.10 2 The diameters and coupling holes must fit properly. 3.18 2.40 0.22 0.24 0.17 3 All cutters (with the exception of ø125 mm type) 4.05 3.20 0.24 0.32 0.19 have two key slots enabling staggered stacking. 4.78 4.00 0.28 0.40 0.11 4 Maximum value of shim ∆S (see table below) refers 5.00 4.00 0.28 0.40 0.22 to maximum size of ∆S1+∆S2 defined for a complete 5.20 4.00 1.50 0.40 — overlap of radii. When a projection is allowed at thebottom of the groove, ∆S1 and ∆S2 may be increased6.35 5.20 0.50 —(1) 0.13 theoretically up to the corner size of the insert. ∆A max - Maximum possible side ground for each cutter 5 Pins of the driving flange set should be lengthened ∆S max - Maximum possible shim width for each cutter to ensure contact length of at least 8 mm into W, W1, W2 - Normal width of insert one flange and 3 mm into the other. 6 When coupling cutters W=6.35, a shim (S) Milling Wider Slots with of 0.16 mm minimum thickness must be used. Stacked, Double Cutters 7 The tolerance of effective widths is up to ± 0.2 mm. Due to the accumulation of tolerances, a step of 0.1 mm may occur at the groove bottom. (1) Only cutters with 160-250 diameter sizes can be stacked. 380 ISCAR