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Cutting of composite materials: A quality and processing time optimized scan strategy for GFRP and CFRP

: Schneider, Frank; Petring, Dirk; Wolf, Norbert

Wissenschaftliche Gesellschaft Lasertechnik -WLT-:
Lasers in Manufacturing, LiM 2019. CD-ROM : Munich ICM, Internationales Congress Center München, Germany, June 24-27, 2019 : World of Photonics Congress
Erlangen: WGL, 2019
10 pp.
Lasers in Manufacturing Conference (LiM) <2019, Munich>
World of Photonics Congress <2019, Munich>
Conference Paper
Fraunhofer ILT ()
CFRP cutting; fiber laser cutting; multi-pass; scan strategy

Glass fiber and carbon fiber reinforced plastics (GFRP, CFRP) play an important role in the material mix of automotive and aerospace components. Light weight design has to be consistent with the availability of an efficient production technology. Cutting of these materials with multi kW-fiber lasers enables the demanded cutting speeds in the range of meters per minute. An optimization procedure is presented for a multi-pass process in order to achieve high quality cut edges and short processing times by appropriate setting of scan speed and interval times between scans. The process is demonstrated by trimming a car roof bow. Following a multi material approach, the part consists of two stacked layers of GFRP and CFRP at the cut path. Since the length of the cut is 800 mm at each side of the roof bow, the scan field (200x200 mm²) is moved continuously over the workpiece, demonstrating the applicability for bigger components.