研究目的
To model and optimize multiple quality characteristics of kerf geometry during pulsed Nd: YAG laser cutting of nickel based superalloy thin sheet along the straight cut profile.
研究成果
The developed second order response surface model for top kerf deviation and kerf taper was found adequate. Optimal levels of the laser cutting parameters were identified for minimizing both quality characteristics simultaneously.
研究不足
The study is limited to the straight cut profile and does not explore complex profiles. The range of laser cutting parameters is based on pilot experimentation for through cutting.
1：Experimental Design and Method Selection:
Box-Behnken design (BBD) based experiments were conducted to study the effects of lamp current, pulse duration, pulse repetition rate, and scanning speed on top kerf deviation and kerf taper.
2：Sample Selection and Data Sources:
Nickel-based superalloy (Inconel 718) thin sheet of
3：7 mm thickness was used. List of Experimental Equipment and Materials:
Pulsed Nd: YAG laser beam cutting system (CNCPCT-300 model), optical measuring microscope (Model: LEICA-S8APO).
4：Experimental Procedures and Operational Workflow:
Laser cutting was performed with constant nozzle diameter, focal length of lens, stand-off distance, sheet material thickness, and gas pressure.
5：Data Analysis Methods:
Response surface methodology (RSM) was used for developing models and optimizing the responses.
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