At present, laser cutting is currently employed to cut metallic plates, due to their good finish and dimensional quality, as well as because of the flexibility of the process to obtain different shapes. In the present paper, surface roughness, dimensional accuracy, and burr thickness of thin plates of 0.8 mm are studied as functions of different process parameters: pulse frequency, pulse width, and speed. Eight different experiments were performed according to a full 2³ factorial design, with two replicates each. Square specimens of 10 mm × 10 mm were cut. Arithmetical mean roughness Ra was measured with a contact roughness meter, and the dimensions and burr thickness with a micrometer. Ra values ranged between 1.89 and 3.86 µm, dimensional error values between 0.22 and 0.93%, and burr thickness between 2 and 34 µm. Regression analysis was performed, and linear models were obtained for each response. Results showed that roughness depends mainly on frequency, on the interaction of frequency and pulse width and on pulse width. The dimensional error depends on pulse width, frequency, and the interaction between pulse width and speed. Burr thickness is influenced by frequency, pulse width, and the interaction between frequency and speed. Multi-objective optimization showed that, in order to simultaneously minimize the three responses, it is recommended to use high frequency (80 Hz), high pulse width (0.6 ms), and high speed (140 mm/min). The present study will help to select appropriate laser cutting conditions in thin plates, in order to favor good surface finish and dimensional accuracy, as well as low burr thickness.

中文翻译：

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工艺参数对激光切割不锈钢薄板质量的影响

目前，激光切割目前用于切割金属板，因为它们具有良好的光洁度和尺寸质量，以及由于工艺的灵活性以获得不同的形状。在本文中，0.8 毫米薄板的表面粗糙度、尺寸精度和毛刺厚度作为不同工艺参数的函数进行了研究：脉冲频率、脉冲宽度和速度。根据完整的 2 ³因子设计，每个重复两次。切割 10 mm × 10 mm 的方形试样。算术平均粗糙度Ra用接触式粗糙度计测量，尺寸和毛刺厚度用千分尺测量。Ra 值介于 1.89 和 3.86 微米之间，尺寸误差值介于 0.22 和 0.93% 之间，毛刺厚度介于 2 和 34 微米之间。进行回归分析，并为每个响应获得线性模型。结果表明粗糙度主要取决于频率、频率和脉冲宽度的相互作用以及脉冲宽度。尺寸误差取决于脉冲宽度、频率以及脉冲宽度和速度之间的相互作用。毛刺厚度受频率、脉冲宽度以及频率和速度之间的相互作用的影响。多目标优化表明，为了同时最小化三种响应，建议使用高频 (80 Hz)、高脉冲宽度 (0.6 ms) 和高速 (140 mm/min)。本研究将有助于在薄板中选择合适的激光切割条件，以有利于良好的表面光洁度和尺寸精度，以​​及低毛刺厚度。