The plasma cloud charge sensor was applied to detect the status of keyhole molten pool during pulsed plasma arc welding, furthermore, the detected signals were studied.
将等离子云传感器应用于脉冲等离子弧焊穿孔熔池小孔状态检测，并对检测信号的波形特征做了深入研究。
Electron beam welding has significant keyhole effect, it induces the electron beam welding different from general melting, and also important influence on its welding stresses and distortion.
电子束焊接具有显著的小孔效应，这一特点决定着电子束焊接过程和普通熔化焊不同，并对其焊接应力和变形产生重要影响。
A numerical method is presented for the two dimensional quasi steady state heat transfer on high power density laser welding processes according to the keyhole model.
对高能量密度激光匙孔焊接过程的二维准稳态传热进行了计算方法的研究。
The welding process is influenced by the plasma produced by laser irradiation. Plasma plume above the keyhole is the bright, often bluish, flash frequently seen during laser welding.
激光焊接中，光致等离子体的产生，尤其是小孔外闪烁的明亮蓝色等离子体云，影响着激光焊接过程的进行。
By analysis of the establishing process of the keyhole weld pool, the regularities of the welding parameters are obtained.
通过穿孔过程分解研究，揭示出焊接工艺参数在小孔稳定建立过程中的影响规律。
The relationship between the keyhole behavior and arc light emission flux is studied by spectroscopic method in plasma arc welding of stainless steel.
针对不锈钢穿孔等离子弧焊过程，熔池小孔的特征行为与弧光光谱辐射强度之间的关系进行了光谱试验研究。
And the keyhole is characteristics of deep penetration laser welding.
小孔效应是深熔焊接中的特征现象。
The main defects of laser spot welding of aluminum are crater, hot crack and porosity which created by oxide film and keyhole instability,.
焊点中存在的主要缺陷是气孔，表面下塌，热裂纹，其中气孔主要为氧化膜气孔和匙孔不稳定形成的气孔。
Based on just mentioned put forward a basic thought of realizing the automatic control system of keyhole plasma arc welding and designed ensemble control programme.
据此提出了实现等离子弧焊闭环质量控制的基本思想并设计了总体控制方案。
Based on TPAW, finite element calculation of temperature field in keyhole plasma arc welding is conducted, and.
在此基础上，对小孔等离子弧焊接热场进行了有限元计算，分析了引弧后熔池及周围温度场的瞬时演变过程。
Keyhole stability during plasma arc welding welding process is critical to the process stability and weld quality.
在穿孔等离子弧焊接过程中，小孔稳定性对焊接过程的稳定和优质的焊缝成形是非常关键的。
A quality monitoring system has been developed for laser-welded tinplate using specific optic and acoustic signals generated by the plasma during "keyhole" welding.
针对激光小孔效应焊过程中等离子体辐射出特征光并伴随特征声的现象，提出了采用光声信号联合实时监测激光焊接质量的方案。
To gain good joint strength, the pulse peak power and defocusing distance should be chosen appropriately to implement welding in keyhole mode, and moreover, pulse duration should not be too long.
为获得较高的连接强度，宜使峰值功率与离焦量适当配合，实现深熔焊模式进行焊接，而脉冲宽度不宜太大。
To gain good joint strength, the pulse peak power and defocusing distance should be chosen appropriately to implement welding in keyhole mode, and moreover, pulse duration should not be too long.
为获得较高的连接强度，宜使峰值功率与离焦量适当配合，实现深熔焊模式进行焊接，而脉冲宽度不宜太大。
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