ForschungPublikationen
Hybrid Positioning for Large Laser Cutting Operations of Carbon Fiber Reinforced Plastics

Hybrid Positioning for Large Laser Cutting Operations of Carbon Fiber Reinforced Plastics

Kategorien Konferenz (reviewed)
Jahr 2014
Autoren Litwinski, K., Eckl, M., Lepper, T., Denkena, B.:
Veröffentlicht in The 15th International Conference on Precision Engineering, (2014), Kanazawa, Ishikawa, Japan, S. 350 - 354.
Beschreibung

Due to rising energy requirements, the use of low weight materials becomes more important especially in aerospace and automotive engineering. Because of the strength to weight ratio, metals are increasingly replaced by carbon fiber reinforced plastics (CFRP). These materials are usually machined with milling operations. Main problems are high tool wear, thermal damage, and surface integrity. This paper presents an approach to substitute milling by laser cutting. Because a high and constant trajectory velocity is required during operation, a highly dynamic machine is needed. Conventional machine tools with large workspace are very expensive and inertial and therefore unsuitable for this task. Thus, a portal machine was designed with an additional laser scanner and lightweight moving components. With FE simulations the mass of the moving parts could be reduced significantly. To increase path accuracy two control strategies have been implemented and analyzed with a multi body simulation as presented in this paper. One approach is a frequency separating filter while the second bases on an estimation of the tool center point positioning error with help of a Kalman filter. Results presented in this paper show that with these control strategies high dynamic trajectories can be realized with high precision.