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赵家瑞, 胡绳荪, 孙栋, 路登平. 高频脉冲微束等离子焊接电弧行为及其工艺的研究[J]. 焊接学报, 1989, (4): 209-214.
引用本文: 赵家瑞, 胡绳荪, 孙栋, 路登平. 高频脉冲微束等离子焊接电弧行为及其工艺的研究[J]. 焊接学报, 1989, (4): 209-214.
Zhao Jiarui, Liu Shengsun, Sun Dong, Lu Dengping. STUDIES OF THE BEHAVIOUR OF HIGH FREQUENCY PULSED MICRO-PLASMA WELDING ARC[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1989, (4): 209-214.
Citation: Zhao Jiarui, Liu Shengsun, Sun Dong, Lu Dengping. STUDIES OF THE BEHAVIOUR OF HIGH FREQUENCY PULSED MICRO-PLASMA WELDING ARC[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1989, (4): 209-214.

高频脉冲微束等离子焊接电弧行为及其工艺的研究

STUDIES OF THE BEHAVIOUR OF HIGH FREQUENCY PULSED MICRO-PLASMA WELDING ARC

  • 摘要: 采用红外摄象微机图象处理法对直流、高频脉冲微束等离子弧的温度场进行了测试;用激光显示技术观察了电弧与周围气流的形态;用微压测量器测量了电弧轴向压力。结果表明,高频电弧中心的轴向温度梯度低于直流电弧中心的轴向温度梯度。当脉冲频率大于10kHz时,随着脉冲频率的增加,高频电弧的直径逐渐缩小,小电流时尤为明显。高频电弧周围的气流具有与直流电弧周围气流相似的稳定性。高频电弧的最大轴向压力大于直流电弧。当脉冲频率大于10kHz时,脉冲频率增加,电弧最大轴向压力减小。

     

    Abstract: In this paper, the temperature field of DC high frequency pulsed microplasma are was studiod by the infra-red photograph microcomputer image processing method. The arc and gas flow were observed by the laser display technique. The axial pressure of arc was measured by a micro-pressure measuring instrument. Results show that the axial temperature gradient in the center of hi h frequency arc is lower than that of DC arc. When the pulse frequency is over 10 kHz, the diameter of high frequency arc constricts with the frequency increment. This is more so at low current. The gas flow surrounding the high frequency arc is as stable as that in the case of DC arc. The maximum axial, pressure of the high frequency arc is higher than that of the DC arc. When the pulse frequency is over 10 kHz, the maximum axial pressure of high frequency arc decreases with the increase of pulse frequency.

     

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