Hard part turning

CB7015 for finish turning of
case hardened transmission components

Significant savings can be made by switching from grinding to turning of hardened surfaces. With the introduction of a range of CBN inserts for turning of case hardened transmission components a further step is taken.

CB7015 gives predictability and the ability to work at a high metal removal rate. The unique Safe-Lok design contributes to a reliable operation.

Success stories
For cutting data - see our catalogue supplement
View the CB7015 video
Increased speed (vc) capability
CB7015 is a polycrystalline CBN grade of fine grain size with a unique ceramic binder.

The key to improved performance at high cutting speeds, when machining continuous to light interrupted cuts, lies in the ability of wear to develop slowly in a controlled way, and at high temperatures.

Increased feed (fn) with Sandvik Coromant wiper technology
Machine at high feed and still obtain the process reliability with our patented radius configuration that is less sensitive to misalignment than conventional wipers.
Increased cutting depth (ap) with large, solid CBN corners
Large cutting depths possible when machining up to shoulders, undercuts and in other profiling operations.


Dual edge identification system
To simplify detection of used edges, the inserts have a thin, golden TiN coating and each cutting edge is permanently marked with an identifying number.



Safe-Lok multi-corner technology
Mechanically interlocked CBN corners brazed far from the hot cutting zone provide strength and security, superior to conventional tip design.

1. Conventional braze
2. Safe-Lok braze




Success stories – cycle times reduced by 50% and more

Turning vs. grinding
Component: Pinion shaft, 59-62 HRc

Previous manufacturing method:
Rough-, finish- and groove grinding done on separate machines

New manufacturing method:

4 axis CNC lathe


SEMI-FINISHINGFINISHING
Ceramic insertCBN, Multi corner insert
Cutting speed vc:
200 m/min
Cutting speed vc:
160 m/min
Feed fn:
0,18 mm/r
Feed fn:
0,08 mm/r
Depth of cut ap:
0,08 mm
Depth of cut ap:
0,05 mm
Result
- 1 CNC lathe replaced 3 grinding machines.

- Cycle time reduced by up to 80%.


Wiper vs. conventional geometry



Component:
58 HRc



Previous cutting data:New cutting data:
CBNCBN, Multi corner insert with WH wiper
Cutting speed vc:
230 m/min
Cutting speed vc:
230 m/min
Feed fn:
0,08 mm/r
Feed fn:
0,25 mm/r
Depth of cut ap:
0,3 mm
Depth of cut ap:
0,3 mm
Result
- Cycle time reduced by 50%.

- Cost per part reduced by 42%.



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© Sandvik CoromantLatest update: 02/28/2011 09:29:17 PM

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