Experimental study on CFRP drilling with the picosecond laser double rotation cutting technique

Machining holes on carbon fiber reinforced polymer (CFRP) components is a key process in aircraft lightweight manufacturing. The picosecond laser double rotation cutting technique was proposed to machine holes on CFRP in this paper. The machining accuracy, the heat affected zone (HAZ), microstructures and mechanical properties were investigated. The result showed that there are no burrs and fractures around the hole. The machining accuracy is about 60 mu m, and the machining taper is about 0.64 degrees. There are no interlaminar tearing, cracks and burrs on the cutting section, and the fracture surface of carbon fibers is regular without tearing. The mechanical properties such as the tensile strength and the fatigue performance of CFRP sample after machined using the picosecond laser is improved compared with that machined using the mechanical drilling method.

Automated summary

The picosecond laser double rotation cutting technique was used to machine holes on CFRP components, resulting in improved mechanical properties compared to traditional mechanical drilling methods. The machining process showed high precision without burrs or fractures, leading to enhanced tensile strength and fatigue performance of the CFRP samples.