LASER ROUGHENING
LASER ROUGHENING
The thermal coating of cylinder bores is a technology that is in high demand, with increasing the efficiency of the internal combustion engine being the primary goal.
LASER ROUGHENING FOR RELIABLE RACEWAY COATINGS
In the case of laser roughening, increasing the efficiency of the combustion engine is the overriding goal. In order to create a resilient bond between layer and substrate, high-performance roughening processes are required that ensure functionality in every respect. The key prerequisites for the adhesion of a layer are the form fit through undercuts and a complete micro-conformal filling of the roughened profile with sprayed material.
TARGET OF LASER ROUGHENING
The all-over micro form fit enables high adhesive strength. These are of particular importance for the motor function of the layer. The layer can thus be sufficiently loaded in all directions. Another goal is the flexible design of the roughness profile. Blasting parameters and process kinematics enable both spiral profile grooves and closed cavities. Since there is no mechanical processing with high tool costs, the operating costs are comparatively low. A considerable saving of coating material is also possible with laser roughening, since high adhesive tensile strengths can be achieved even with low roughness.
Micro form fit through undercuts
LASER ROUGHENING PRINCIPLE
When the high-energy light beam hits the material, energy is locally absorbed and converted into heat. With a suitable selection of parameters, this leads to the functionally appropriate formation of the roughness profile in both aluminum and cast iron. The light beam performs a superimposed rotary and feed movement, so that the entire borehole is machined in accordance with the cycle time.
PRODUCTION TECHNOLOGY FOR LASER ROUGHENING
The laser roughening process is determined by the innovative rotary optics. Due to the compact design of the Gehring machines, twin machining of two cylinder bores is possible at the same time. The quasi-vibration-free operation is made possible by the hollow shaft motor and standing immersion optics. The use of high-quality materials guarantees a long service life for the optical components. An industrial camera is used for process monitoring, especially during setup. The periphery for the fully automatic roughening module with an optimized footprint consists of an extraction system and coolant system for the beam source and rotation optics.
ADVANTAGES OF LASER ROUGHENING
- High tensile strength
- Saving of coating material due to low roughness and high adhesive strength at the same time
- Suitable for cast iron and aluminum
- Use in two-stroke engines
- High flexibility in the shape of the roughened topography through parameterization
- Suitable for all thermal spray coatings
- Tested in the series
- Economical series operation, as there are no tool costs
