研究目的
Investigating the effects of pulse waveforms on Heat Affected Zone (HAZ) occurrence and cutting speed in the laser processing of CFRP using a high power 355-nm UV laser.
研究成果
Shorter pulse widths and pulse splitting were found to be effective in reducing HAZ and increasing cutting speed for PAN-based CFRP. Higher cutting speeds were observed with lower pulse energy and higher repetition rate for the same average power. HAZ width depends mainly on the pulse energy and slightly on the pulse width.
研究不足
The study was limited to PAN-based CFRP sheets of 250 μm thickness. The effects of other parameters such as wavelength and scanning speed were not investigated in this study.
1：Experimental Design and Method Selection:
The study focused on varying pulse waveforms (pulse width, pulse splitting, and burst mode) to investigate their effects on HAZ and cutting speed. A high power 355-nm UV Quasar? laser with TimeShift? technology was used.
2：Sample Selection and Data Sources:
PAN-based unidirectional CFRP sheets with a thickness of 250 μm were used.
3：List of Experimental Equipment and Materials:
Spectra-Physics 355-nm UV Quasar? laser, telecentric f/θ lens with focal length of 163 mm, galvanometer-based scanning system.
4：Experimental Procedures and Operational Workflow:
Pulse width was varied from 2 ns to 10 ns, and pulse splitting and burst mode technology were tested. Laser power was adjusted from 6 to 60 W by changing the repetition rate from 100 kHz to 1 MHz.
5：Data Analysis Methods:
Time to cut through the samples was measured, and HAZ was evaluated based on SEM observation.
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