Hard turning optimization application example 00:24

In finish hard turning it is vital to reach the required surface roughness tolerances, since it is the final operation before assembly. The most common way to increase productivity in hard turning is to use a wiper insert. A wiper insert will allow you to increase the feed rate, while maintaining low surface roughness values, and reaching long tool lives.

When machining a curved surface, like in a profiling operation, the approach angle changes depending on where you cut, and a wiper insert will not work. So what can be done?

In the following example, we analysed the influence from edge preparation and coating when machining the raceway of a bearing ring:

• Changing edge preparation
• Small edge hone & large edge hone
• Using a coating
• CBN010 & CBN010C

We decided to keep all cutting data parameters the same, to be able to see the influence from the test parameters. As can be seen below, using a large edge hone combined with a coating gave the best tool life.






This is a real application example, and the results should not be taken as general recommendations.

For more information, please contact your local Seco representative, or our Advanced material (PCBN/PCD/CERAMIC) team.

Author: Henrik Sandqvist Product Specialist SECOMAX PCBN/PCD/CERAMIC SECO TOOLS Shanghai CO., Ltd. Level 2, Building 8, 456 HongCao Rd., Shanghai 200233, China Office: +86 21 5426 5849 Mobile: +86 185 1520 6942 e-mail: henrik.sandqvist@secotools.com