During structuring, the laser creates regularly arranged geometries in the layer or in the base material, so that the technical characteristics are changed in a targeted manner and a new functionality is developed. One example: scoring or applying small (oil) depressions for defined sliding properties. The individual elements of such a structure often measure only a few micrometres. Short laser pulses with very high pulse power generate such high energy densities that the material usually evaporates immediately (sublimation). Each laser pulse produces a small depression, melt is predominately prevented.
Certain properties are generated by laser structuring which, for example, have an effect on the friction characteristics or electric and thermal conductivity. In addition, laser structuring increases the adhesive strength and longevity of the workpiece.
No additional blasting agents or chemical substances which would prove elaborate and expensive are needed for structuring surfaces.
The laser achieves controlled structures, precise down to the micrometre and which are very easy to reproduce.
Compared to mechanical tools which can wear out quickly, the laser is non-contact and therefore absolutely wear-free.
No melt or other processing residue is left on the component with laser processing.
In laser structuring, regularly arranged geometries are generated in surfaces in a reproducible way using laser radiation (usually pulsed). The laser beam melts the material in a controlled manner and solidifies into a defined structure thanks to appropriate process management.
1. The laser radiation hits the workpiece surface.
2. The laser radiation heats the absorbing material.
3. Structures are generated as the melt solidifies.
Our expert explains how laser structuring works, where it can be used and what equipment you need for it.
For bonding, surface pretreatment and preparation with the laser is an important part of the process chain and an effective and environmentally friendly alternative to conventional preparation methods. Cleaning and structuring: TRUMPF; adhesive: DELO.
Adhesive bonding technologies require clean and slightly textured surfaces. Structuring and cleaning are carried out in one process step with the laser before adhesive bonding – locally at the seam joint. Better wettability is achieved with the adhesive agent thanks to structuring. This increases the adhesion and long-term stability of the bonded connection. This laser process can be easily integrated into automated production lines.
The tribological characteristics of functional surfaces can be improved precisely with laser structuring. This procedure is used in the production of automotive components.
The laser creates microstructures in the metallic mating part with undercuts which facilitate the plastic gripping into the metallic surface. This procedure, for example, is used in the production of automotive components or white goods. Hybrid metal-plastic connections are playing an increasingly important role in lightweight design since they combine the high strength and rigidity of metals with the low weight and great design freedom of plastics.
The laser creates microstructures in the metallic mating part with undercuts which facilitate the plastic gripping into the metallic surface. Such connections are used in cooling and heating systems, for example the battery system cooling in the battery pack. It provides optimum operating conditions.
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