Каталог Iscar обработка канавок 2022 - страница 168

GROOVE-TURNTEXT USER GUIDE Machining Tips Correct grooving sequence Internal Machining When making a groove where the insert’s width is not identical to the groove, it is recommended to select an Improving Internal Turning in a Blind Hole insert that will enable grooving symmetrically in such Internal turning in a blind hole brings about the a way that the material is always in the center problem of chip exit. When the tool reaches the rear of the insert. This practice will ensure better side wall, chips may be caught between the wall chipbreaking and symmetrical cutting forces. and the insert, possibly causing insert breakage. Two solutions that can eliminate this problem: 1 First Solution 1 Start by grooving at the rear wall. 2 Continue by turning from the inside toward the outside. 2 1 2 3 Second Solution 1 Start by grooving at the rear wall. 2 Pull the tool back toward the outside. 3 Turn the final diameter from outside, toward the groove. Eliminating a “Hanging Ring” When turning at the end of a bar or towards a recessbetween two walls, a “hanging ring” may be formed.123 45 To eliminate the unwanted “hanging ring”: 1 1 Turn toward the recess. Stop a shortdistance before reaching the recess.Optimizing Internal Machining Toolholder OverhangIt is always recommended to use the minimum possible 3 4 overhang in order to maintain maximum toolholder 2 rigidity. As a general rule, maximum overhang should not exceed three times the holder-bar diameter. Lmax.≤3D ¯D 2 Pull back the groove-turn tool and re-position it. 5 LÊmax. 3 Machine as shown. This final operation achieves the size and flatness of the side wall. 422 ISCAR