Secomax™ CBN170, MDT and JETSTREAM 03:42

The Secomax™ grade CBN170 is the world’s first PCBN grade with a whisker reinforced binder. This unique composition makes the inserts withstand the high forces, the high temperatures and the abrasiveness associated with machining of hardened nickel-based superalloys.

The patented Secoloc™ serrations between the holder and insert on Seco Tools MDT-inserts (Multi-Directional Turning), makes it the most rigid groove-turning system on the market.

Jetstream Tooling® delivers coolant to the optimum position close to the cutting edge. The penetration of the high-energy jet into the tool–chip interface reduces the temperature gradient and eliminates the seizure effect, offering adequate lubrication at the tool–chip interface with a reduction in friction in addition to alteration of the chip flow conditions resulting in lowering of component forces and consequently tool wear rate.

An example where these three Seco Tools unique characteristics; CBN170, Secoloc and Jetstream together is the solution for optimized grooving of hardened nickel-based superalloys is shown below:

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

Author: Per Ola Jönander Product Specialist SECOMAX PCBN/PCD/CERAMIC SECO TOOLS AB 737 82 Fagersta, Sweden Office +4622340818 Mobile +46703163555 email:perola.jonander@secotools.com

Rough hard turning of rolls application example 04:10

In hard turning applications, the definitions for a rough cut and a finish cut are based on depth of cut:

• Rough cut depth of cut ap > 0.5 mm
• Finish cut depth of cut ap < 0.5 mm 

For rough hard turning, usually a high cBN-content grade (80-90% cBN) is used, and for finishing, a low cBN-content grade (40-65% cBN) is used.

Most components in the automotive industry, like gears and shafts, are case hardened and only require a finish cut before assembly. In the bearing industry as well as in the manufacturing of rolls, rough hard turning is a more common operation.

The main requirements on a CBN-grade for rough hard turning are:

• high abrasion resistance
• high hot hardness

But they also need to be tough enough to withstand e.g. variations in depth of cut.

A customer was using ceramics for hard turning of a roll. He was taking 10 cuts, each 0.15 mm depth of cut, to remove the total stock of 1.5 mm. To finish the component, he needed 40 edges.

Ceramics are not suited for these kinds of operations due to their lack of toughness. By using rough hard turning with a CBN-insert, tool life was increased significantly and thereby reducing machine downtime due to insert change. With this method, he only needed 2 edges to finish the component.

By using rough hard turning, productivity can be increased significantly compared to e.g. grinding or the use of multiple finishing cuts

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

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