Каталог Sumitomo инструмент для обработки канавок - страница 18

Tips for Facing

Holder selection Important point for groove expansion MG ML GG GL GF GA

Recommended chipbreakers

F

Grooving

Cut-Off

Threading

Min. machining

Max. machining diameter diameter １

2 ３ Min. machining diameter ４ ５

• Choose a holder so the external diameter of the groove to be machined first can come in the maximum and minimum machining range of the said holder. During groove expansion, if the first groove is within the valid machining
• If the first groove is within the valid machining diameter range, there will diameter range, there will not be any limitations from the second and not be any limitations from the second and later passes. later passes.

Important point for traverse turning: MG ML RN

Recommended chipbreakers From a holder rigidity standpoint, we recommend machining from the external diameter toward the internal diameter.

External diameter side → Internal diameter side Internal diameter side → External diameter side

Feed direction Feed direction Cutting point Cutting point When machining from internal diameter to external diameter, the principal cutting force takes up less of the insert so it will become less rigid.

• During face traverse machining, if the first groove is within the valid machining diameter range, there will not be any limitations from the second and later passes.
• Choose the lower limit of the recommended cutting conditions for the chipbreaker and straighten and discharge the chip. (In face grooving, broken chips can easily get caught in the groove and cause a problem.)
• Break chips by step feeding.

Tips for Internal Diameter Machining

Important point for internal diameter machining ML GL GF

Recommended chipbreakers

If the prepared hole machining diameter is too small, use a low feed type chipbreaker ML type or GL type, that will make the chip curls smaller for efficient chip evacuation.

MG ML GG GL

GCMN3004-MG GCMN3002-ML GCMN3002-GG GCMN3002-GL

Work material: SCM415 (Prepared hold dia. ø25 mm) Holder: GNDI R2532-T306 Insert： GCM N300 ○ - ○○ Cutting conditions: v = 100 m/min f = 0.1 mm/rev a = 3.0 mm Wet c p

Internal diameter External diameter

GG GG

Even in the same cutting conditions, the chip shapes vary

between internal machining and external machining.

Work material: SCM415 Holder: GNDL R2525M-320 Insert: GCM N3002-GG Cutting conditions: v = 100 m/min f = 0.10 mm/rev a = 5 mm Wet

GCMN3002-GG c p