LASER STRUCTURING
LASER STRUCTURING
Raised microprofiles cause increased static friction
MICROPROFILES FOR HIGH STATIC FRICTION
Laser structuring is increasingly being used to roughen surfaces. In the process, raised microprofiles are created, which cause the highest possible static friction to the counter-body. The pulsed laser beam is focused at a point on the material surface, resulting in very high local intensities .
Through the thermal treatment process, the material is locally and temporarily transferred to the melting phase. This leads to melting beads that protrude from the surface as elevations. These individual profile peaks therefore consist of melt ridges which, as raised surface structures, dig into the surface of the counter-body in their function as a component and thus produce high static friction.
PRINCIPLE OF LASER STRUCTURING
The raised profile structures cause a micro form fit. A high level of static friction therefore occurs between the contact surfaces. In the case of ferritic materials, the raised melt bulges consist of a martensitic structure.Due to their increased hardness, they therefore have an invasive effect on the surface of the counter-body. They press into the softer outside of the unstructured material, e.g. B. the bearing shell and thus enable reliable power transmission.
GOAL OF LASER STRUCTURING
By roughening technical surfaces with a static friction function, a loss-free, torsion-proof and/or shear-proof connection between two components is created. This connection meets the functional requirements and simplifies the structural design of the components.
In addition, friction-increasing intermediate materials such as diamond foils are substituted and the manufacturing costs are further reduced.
YOUR BENEFIT
- Substitution of diamond foils (end press connection)
- Substitution of groove and keys (shaft-hub-connection)
- Free choice of structure
- No tool costs
- Short processing time of a few seconds
- No warping of the parts
- No heating of the workpiece
- High operational reliability
- High degree of automation
- Worldwide series experience
SYSTEMS FOR LASER STRUCTURING
For the industrialization of laser structuring, systems were developed that work with high process reliability in modern production lines. Q-switched solid-state lasers with galvo scanner optics are used as beam sources, which are usually used for inscribing and marking surfaces. Several beam sources can also be arranged to reduce the cycle time. The arrangement depends on the processing task. When structuring bore sections, the rays fall obliquely into the bore. When processing directly accessible surfaces, the beam can be guided normal to the processing surface.
