Laser structuring is increasingly being used to roughen surfaces. In the process, raised microprofiles are created which produce the highest possible static friction with the mating body. The pulsed laser beam is focused in one point on the material surface, resulting in very high local intensities .
The thermal machining process transforms the material locally and temporarily into the melt phase. This leads to melt bulges that protrude from the surface as elevations. These individual profile peaks therefore consist of fusion ridges, which, as raised surface structures in their function as a component, interlock in the surface of the mating body and thus produce a high level of static friction .
The raised profile structures produce a microform closure. There is therefore a high static friction between the contact surfaces. In the case of ferritic materials, the raised fusion impurities consist of martensitic microstructure.
Due to their increased hardness, they thus have an invasive effect on the surface of the counterbody. They press into the softer outer surface of the non-structured material, e.g. the bearing shell, thus enabling reliable power transmission.
By roughening technical surfaces with static friction function, a loss-free torsion- and/or shear-resistant connection between two components is created. This connection meets the functional requirements and simplifies the structural design of the components. In addition, friction-enhancing intermediates such as diamond foils are substituted and manufacturing costs are further reduced.
For the industrialization of laser scribing, systems have been developed that operate with high process reliability in modern production lines. The beam sources used are Q-switched solid-state lasers with galvo scanner optics, which are commonly used for marking and labeling surfaces. Multiple beam sources can also be arranged to reduce cycle time. The arrangement is made according to the processing task. When structuring bore sections, the beams enter the bore at an angle. When processing directly accessible surfaces, the beam guidance can be normal to the processing surface.
Contact us today to learn more about how we can help you with your honing, laser, and stator production machine service needs. Our friendly and knowledgeable team is ready to serve you and look forward to hearing from you!
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