Multi-Quality Decision Using Preference Selection Index Method in Laser Trepan Cutting of Thin Electrical Steel

Abstract:

Laser machining has become an excellent choice for cutting thin metal substrates due to its ability to deliver high-quality cuts with minimal material waste and fast processing times. In this research, a Nd: YAG nanosecond laser was studied for cutting a hole of a thin electrical steel, with a thickness of 0.1 mm. The trepanning technique was targeted for cutting a circle with a diameter of 1 mm. The three process parameters: laser power (P), scanning speed (v), and pulse frequency (f) are examined to evaluate their influences on the four cutting qualities of the heat affected-zone (HAZ), height of recast layer (H_R), width of recast layer (W_R) and error of diameter (E_D). Each process parameter is elected with three levels and a total of 27 experimental datasets are achieved. Based on the experimental results, the preference selection index (PSI) method was used to determine a set of process parameters through the best cutting multi-quality. Through implementing the PSI calculation, the result shows that the best quality is found by the qualities of HAZ = 82.1 µm, H_R = 17.4 µm, W_R = 24.2 µm and E_D = 14 µm at process parameters of P = 9 W, v = 600 mm/s, and f = 30 kHz.

• Periodical: Key Engineering Materials (Volume 1010)
• Pages: 21-29
• DOI: https://doi.org/10.4028/p-7WK7p2
• Online since: March 2025
• Authors: Hoai Tan Nguyen*, Van Tai Nguyen, Van Cuong Nguyen, Kim Vang Nguyen, Jeng Rong Ho
• Keywords: Laser Trepan-Cutting, Multi-Quality Decision, PSI Method, Thin Electrical Steel

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