<p>Tungsten alloys are extensively used in the aerospace industry as challenging materials to machine. Achieving high-quality cutting of tungsten alloys presents a significant hurdle in the field of mechanical processing. The introduction of pulsed electrical current during the cutting process can effectively enhance the machinability of tungsten alloy materials by utilizing the electroplastic effect. However, the precise impact of pulsed electrical current parameters on the machining performance of tungsten alloys remains uncertain. To address the difficulties associated with cutting tungsten alloys, such as high machining difficulty, poor surface quality of the machined surface, and high cutting forces, a full factorial experiment was conducted with electrical pulse assisted cutting using W93NiFe alloy as the research subject. The experiment investigated the effects of different charging voltages and pulse current frequencies, serving as variables, on the surface quality and cutting performance. The experimental results demonstrated that, compared to conventional cutting, electroplastically assisted cutting could effectively improve the surface quality of machined tungsten alloys and enhance cutting performance. With increased charging voltage, both surface roughness value and cutting forces exhibited a decreasing trend. The largest reduction was observed under the condition of 80 V, where the surface roughness decreased by 42.04% and the main cutting force decreased by 33.15% compared to conventional turning. However, excessively high voltage could lead to an increase in surface roughness and cutting forces. Pulse current could result in elevated temperatures in the cutting region.</p>

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Experimental study on electric pulse assisted cutting of tungsten alloy

  • Lixiang Zhao,
  • Guangjun Chen,
  • Jie Liu,
  • Jiashuai Huang

摘要

Tungsten alloys are extensively used in the aerospace industry as challenging materials to machine. Achieving high-quality cutting of tungsten alloys presents a significant hurdle in the field of mechanical processing. The introduction of pulsed electrical current during the cutting process can effectively enhance the machinability of tungsten alloy materials by utilizing the electroplastic effect. However, the precise impact of pulsed electrical current parameters on the machining performance of tungsten alloys remains uncertain. To address the difficulties associated with cutting tungsten alloys, such as high machining difficulty, poor surface quality of the machined surface, and high cutting forces, a full factorial experiment was conducted with electrical pulse assisted cutting using W93NiFe alloy as the research subject. The experiment investigated the effects of different charging voltages and pulse current frequencies, serving as variables, on the surface quality and cutting performance. The experimental results demonstrated that, compared to conventional cutting, electroplastically assisted cutting could effectively improve the surface quality of machined tungsten alloys and enhance cutting performance. With increased charging voltage, both surface roughness value and cutting forces exhibited a decreasing trend. The largest reduction was observed under the condition of 80 V, where the surface roughness decreased by 42.04% and the main cutting force decreased by 33.15% compared to conventional turning. However, excessively high voltage could lead to an increase in surface roughness and cutting forces. Pulse current could result in elevated temperatures in the cutting region.