| Autor: |
Monnot, Philippe, Lévesque, Jonathan, Vermeersch, Olivier, Lebel, Louis Laberge |
| Předmět: |
|
| Zdroj: |
International Sampe Technical Conference; 2016, p601-615, 15p |
| Abstrakt: |
Automated manufacturing of dry preforms for composite structures has shown to improve control and repeatability of fiber orientation as well as to increase process speed. This paper proposes an integrated braiding solution for curved centerline mandrels with axisymmetric sections. It combines the flexibility of a seven degrees of freedom industrial manipulator with a 144 carriers radial braiding machine. The mandrel is braided by keeping its centerline coincident with braider's central axis, ensuring constant radial tension of yarns along the process. Pre-processing starts by defining mandrel's centerline using Frenet-Serret frames. Du et al. braiding model is used to relate the braid's architecture with the mandrel's take-up speed. The convergence zone length is synchronized with the mandrel's positions in order to diminish the transitory regime. Based on the centerline definition and take-up speeds, a multi-objective algorithm optimizes the path of the manipulator. The braiding solution's repeatability, accuracy and precision were validated on an industrial system. Two mandrels with increasing complexity were braided. Fiber angles were measured by imaging. A statistical analysis done on the measured fiber angles confirms the predictions made using the integrated braiding solution. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
