Heavy duty machining
Crank shaft machining
Crankshaft machining The right milling tool for every processing step
The right tool for every processing step Boehlerit has long-standing expertise and a full range of tools for crankshaft and camshaft machining at its disposal. The tools are designed on a case-bycase basis, in accordance with individual customer requirements. Our tailor-made solutions range from conception all the way to the commissioning of tooling systems using specially developed cutting materials and geometries. We are proud to share our many years‘ experience and our know-how.
Full-service provider
- Initial fitting
- Commissioning
- Continuous process
- optimisation regarding cycle times, quantities and workpiece tolerances
- Supply of spare parts
- Tool repair
- Service and application engineers worldwide
- Training events
Milling of pin bearings and main bearings of crankshafts
External milling cutter for large-volume production of small and medium-size crankshafts.External milling cutter with a diameter of up to 2,100 mm for the largest
monobloc shafts (marine crankshafts and stationary drives).
- Shortest cycle times
- High cutting speeds
Internal milling cutter for the machining of medium-size crankshafts (trucks) and even of ship‘s engines.
- Stable machining conditions
- Highest number of teeth
- Highest machining performance
Turn-milling tools for large crankshafts
Helical cutter
- Milling of cheeks to the fi nal dimensions in a single cutting process
- Lengths of up to 500 mm
- Positive cutting geometries
- Cutting edge arrangement is adapted to turn-milling conditions
Form cutter
- Milling of chamfers to the fi nal dimensions in a single cutting process
- Positive cutting geometries
- Soft cut thanks to offset inserts
Tools for the turn-milling of flange and stub ends
Turn-milling with stationary clamped workpieces with workpiece-specifi c, bell-shaped special tools
Turn-milling with rotating workpieces
Turn-tools and turn-broaching tools
Modular tools with a cartridge structure for turn and turn-broaching operations on the main bearings of crankshafts for passenger car engines.
- Exchangeable cartridges
- Tangential inserts for heavy cutting
- ISO inserts to keep costs low
Bar peeling
Boehlerit – The Partner in bar peeling
As a partner for successful bar peeling, Boehlerit offers complete tooling systems—namely bar peeling heads, holders and cassettes—as well as tools for bar-end machining and wire shaving rings. Bar peeling is a heavy-duty cutting process that is economically employed in diameter ranges from 20 up to 500 –600 millimetres. With standard materials, feed rates of up to 18 millimetres per revolution are common today, which represents many times what is possible in conventional turning. Using appropriate cassette systems, depths of cut of up to 15 millimetres can be achieved.
Always at the forefront
Bar peelers benefit from comprehensive know-how gained from a wide range of applications and processes when it comes to achieving performance increases through new coating developments. In addition, Boehlerit has all coating technologies in-house. Due to the process conditions—particularly the extremely high feed rates—the greatest challenges arise from the required coating adhesion. Much more than in conventional turning, application-specific design of cutting edge geometries moves to the forefront in bar peeling. In Boehlerit’s portfolio, users will find the broadest geometry program available in standard versions, tailored to a wide range of material classes.
Currently, simulation software is used in the development of new insert geometries to analyze chip flow as well as the temperatures and forces generated, in order to achieve the best possible results. A large number of parameters are fed into the software to obtain results that are as close to reality as possible. The interaction between cutting material, coating, geometry, and cutting-edge preparation is usually dependent on the machine and the material to be machined.
Applications are constantly changing, as new materials to be machined are continually being developed and driven by cost savings, machining allowance—especially for smaller diameters—is reduced to a minimum before the peeling process. This aspect presents particular challenges in terms of roundness and surface quality. For larger diameters, this is only possible to a limited extent due to the manufacturing process, which is why tandem or trio peeling systems with large round inserts for high material removal rates are still used.
Current examples of innovative solutions for machining new materials or for achieving significant performance increases in bar peeling include the development of new indexable insert grades for machining carbon steels, the nanotechnology of the universal peeling turning grade BCP25P, and the new grades BCP05P, BCP10P, BCP15P, and BCP35P. In addition, we offer grade solutions for non-ferrous metals such as aluminum and copper. Further information can be found in our new bar peeling catalogue.
Shaving
The economic method to produce peeled steel and non ferrous metals from coil to coil for diameters from about 3 to 15 mm.
Shaving dies designed to the requriements of material and machine on request.
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