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王其隆, 殷树言, 钱乙余. 脉冲电流熔化极气电焊电弧形态的控制及其实际意义[J]. 焊接学报, 1980, (1): 34-42.
引用本文: 王其隆, 殷树言, 钱乙余. 脉冲电流熔化极气电焊电弧形态的控制及其实际意义[J]. 焊接学报, 1980, (1): 34-42.
Wang Chilung, Yin Shuyian, Qian Yiyu. STUDY ON THE PHENOMENA OF THE CONTROLLABILITY OF ARCAPPEARANCE IN THE CONSUMABLE ELECTRODE PULSE CURRENT ARC WELDING PROCESS AND ITS PRACTICAL APPLICATION[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1980, (1): 34-42.
Citation: Wang Chilung, Yin Shuyian, Qian Yiyu. STUDY ON THE PHENOMENA OF THE CONTROLLABILITY OF ARCAPPEARANCE IN THE CONSUMABLE ELECTRODE PULSE CURRENT ARC WELDING PROCESS AND ITS PRACTICAL APPLICATION[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1980, (1): 34-42.

脉冲电流熔化极气电焊电弧形态的控制及其实际意义

STUDY ON THE PHENOMENA OF THE CONTROLLABILITY OF ARCAPPEARANCE IN THE CONSUMABLE ELECTRODE PULSE CURRENT ARC WELDING PROCESS AND ITS PRACTICAL APPLICATION

  • 摘要: 熔化极脉冲焊具有熔滴过渡和热输入量可控的特点,已是众所岗知,本文发现这种方法尚具有电弧形态可控性的特点。脉冲-射流过渡时,即使保持平均电流和电压不变,改变其他参数可以得到三种不同的目视电弧形态:束状、钟状和圆锥状。每种目视电弧形态都有其不同的加热和机械作用性能。用高速摄影观察了脉冲电流作用期间电弧烁亮区尺寸和形状的变化过程。在每一脉冲电流作用过程,如果脉冲时间足够,电弧烁亮区总是从细线状经过束状、钟状变化到圆锥状,以后就不再发生变化。我们将此变化过程的延时称为电弧形态的动态时间(t动态)。不同的目视电弧形态都足由t动态与t脉冲(脉冲时间)的相互关系所决定的。本文试验了脉冲电流幅值、脉冲电流波形、保护气体种类等因素对t动态的影响,得到了控制目视电弧形态的途径;讨论了不同电弧形态的工艺性能的特点及其原因。掌握这种目视电弧形态的可控性规律可以进一步扩大熔化极脉冲焊的应用范围,可以更成功地进行薄板焊接、单面焊反面自由成形、窄间隙焊接、全位置焊接等工作。

     

    Abstract: It has been well-known that the metal transfer and the heat input can be controlled in consumable electrode pulse current are welding process. But we have discovered further another controllable characteristic of this process during our experiments. In the case of pulse-spray transfer even though the average arc current and voltage are kept constant, the visible are appearance can be varied by altering the other operating variables. Keeping the average arc energy unchanged, three different typical visible are appearannees, i.e, the bunch type, bell type and cone type, can be obtained. Each type of these arc appearances offers it's special thermal and mechanical features, and so brings about distinct technological characteristics. During the pulse current cycle, the varied process of the size and the shape of the luminous region of the are has been observed by the high-speed photography. The lumineus region of the arc in the duration of the pulse current period grows gradually from a thin linear shape to a bunch shape and finally to a cone shape and remains so continucusly if the pulse current time is enough. We call the time necessary for this growing process the dynamic time of the luminous region of the pulse current arc (td). The resulting visible appearance of the pulse current arc depends on the relationship between td and td (pulse current time). The effects of the pulse current magnitude, the pulse current wave form and the shielded gas composition on the td have been examined. The dissimilarity of the technological features of these different visible arc appearances as well as its reasons have also been discussed. The controllability of the arc appearances is of help to extend the application field of the cosumable electrode shielded gas arc welding process. It can be utilized successfully in several practical applications, such as in the welding of thin platcs, one-side welding without backings, narrow gap welding process, positional welding processes and so on.

     

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