Efficient manufacturing of large scale structured 3D forming tools through combination of short and ultra-short-pulsed laser processing

Surface functionality is an increasing and crucial factor for the success and acceptance of a product. Structured surfaces are currently used for example in combustion engines for friction reduction or in LED lights for optimized lighting efficiency. Furthermore, not only technical properties but also optical and haptic functions can be created by surface structuring. Especially in the area of consumer products, these functions determine essentially the product quality. Currently there is a shift in automotive interiors from classical leather grain to technical surfaces. Currently used manufacturing processes like photochemical etching are limited in precision (manual preparation and execution) and in flexibility (limited design). This paper investigates the possibility to create structured surfaces with a combined laser ablation process using short and ultra-short laser pulses.