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<p>To address environmental and health risks posed by mineral oil-based dielectric fluids in electrical discharge machining (EDM), this study systematically explored the machining feasibility, machining performance, and sustainability of linseed oil as a green dielectric fluid. Firstly, the flow field characteristics, erosion debris movement rules and evacuation efficiency of linseed oil are analyzed and simulated by dynamic mesh-discrete phase model. Besides, comparative evaluations of machining efficiency, surface roughness, surface morphology characteristics and machining accuracy are conducted between the linseed oil and the conventional EDM oil. Simultaneously, the sustainability assessment is completed from dual dimensions of energy consumption and carbon emissions. Comparative experimental results reveal that the machining efficiency of linseed oil is 10%~35.38% higher than that of EDM oil. Moreover, the surface roughness of steels machined by linseed oil exhibits improved performance under high current conditions, while it is slightly higher at low currents. Additionally, the environmental performance evaluation through energy consumption and carbon emissions further confirms the sustainability of linseed oil. This study confirms that linseed oil can be used as an environmentally friendly alternative to mineral oil-based dielectric fluids, providing experimental data, numerical simulation support, and optimization methods for the green transformation of EDM technology.</p>

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Investigation on sustainability assessment and machining feasibility of linseed oil as a green dielectric fluid to fabricate common industrial steels by EDM method

  • 期刊论文

  • 发表日期：

    2026年3月18日

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  • Tingfang Zheng,
  • Yao Sun,
  • Jichao Liu,
  • Dingding Xiang

摘要

To address environmental and health risks posed by mineral oil-based dielectric fluids in electrical discharge machining (EDM), this study systematically explored the machining feasibility, machining performance, and sustainability of linseed oil as a green dielectric fluid. Firstly, the flow field characteristics, erosion debris movement rules and evacuation efficiency of linseed oil are analyzed and simulated by dynamic mesh-discrete phase model. Besides, comparative evaluations of machining efficiency, surface roughness, surface morphology characteristics and machining accuracy are conducted between the linseed oil and the conventional EDM oil. Simultaneously, the sustainability assessment is completed from dual dimensions of energy consumption and carbon emissions. Comparative experimental results reveal that the machining efficiency of linseed oil is 10%~35.38% higher than that of EDM oil. Moreover, the surface roughness of steels machined by linseed oil exhibits improved performance under high current conditions, while it is slightly higher at low currents. Additionally, the environmental performance evaluation through energy consumption and carbon emissions further confirms the sustainability of linseed oil. This study confirms that linseed oil can be used as an environmentally friendly alternative to mineral oil-based dielectric fluids, providing experimental data, numerical simulation support, and optimization methods for the green transformation of EDM technology.