研究目的
To evaluate the influence of temperature and clamping force on the strength of the resulting joints over different metal-composite combinations and to implement control systems for temperature and clamping force in laser joining processes.
研究成果
Temperature of the part is the most influential parameter in the strength of the joint. The thickness of the samples is particularly relevant on the aluminum samples. The clamping force has little relevance on the joint strength for materials with long glass fibers. Any change on the combination, thickness or geometry of the parts requires new testing trials for establishing the optimal parameters.
研究不足
Any change on the combination, thickness or geometry of the parts requires new testing trials for establishing the optimal parameters. Further research on simulation tools for the estimation of the optimal process parameters is necessary.
1：Experimental Design and Method Selection:
The study used a diode laser for joining operations, with a focus on implementing closed-loop control systems for temperature and clamping force.
2：Sample Selection and Data Sources:
Materials used included steel (DC01) and aluminum (AlMg3) as metallic samples, combined with glass fiber reinforced polyamide (PA6-47%GF) and reinforced polypropylene (PP+47%GF).
3：List of Experimental Equipment and Materials:
A diode laser of
4：1kW power (model DL031Q from ROFIN), a 6 axis Fanuc S10 robot system, a LASCON pyrometer, and a specific clamping device with force control system. Experimental Procedures and Operational Workflow:
The laser beam described a rectangular path over the overlapped area of the samples, with temperature and clamping force controlled during the process.
5：Data Analysis Methods:
The joint strength was analyzed by single lap shear tests using a uni-axial MTS 407 at 5mm/min.
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