Каталог Stellram токарный инструмент - страница 199

Stainless Steel PH

The approach angle or attack angle is very important because it influences the tool life. In the first picture we can see how it affects the chip thickness.

• h is the same as the feed f when the entering angle is 90°or equal to the sin of the approach angle * f
• A 45° approach angle will produce a lower chip thickness with a higher feed

In the second picture we can see the effect on cutting the force distribution.

k k In the first case the first contact is between

= 95° = 45° the workpiece and the insert point, and it is

r r focused on the radius making the situation difficult

• On the second case, the approach angle on the workpiece is softer and the cutting forces, are distributed in a more uniform way, and not directly on the insert point.