Каталог Stellram токарный инструмент - страница 198

Top Rake & Effective Cutting Angle

Top Rake

Positive: Produces low shearing stress and may eliminate vibration during finish – +machining, machining of long workpieces, or poor workholding. -6° 5°

-6°

6° 5° 6°

Negative: Produces larger shearing stress which causes a high chip strain. It is much stronger in comparison to the positive rake and requires good workpiece and tool stability.

6° 6°

Effective Cutting Angle

The position of the insert seat determines the cutting rake:

• This can be negative or 0°.
• The effective cutting angle is also determined by the insert geometry located on the seat, as this could be flat face or a chip breaker and it could change the effective cutting angle.
• The effective cutting angle is the sum of the angle in the insert seat and the geometry of the seated inserts.

< 0 > 0 > 0

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