A novel variable polarity plasma arc welding (VPPAW) power supply is introduced in this paper.
介绍了所研制的具有自调整换向功能的大功率变极性等离子弧焊接电源。
The high-power IGBTs are adopted to design the dual inverter arc-welding power source for variable polarity pulse MIG welding.
提出采用大功率IGBT设计变极性脉冲MIG焊双逆变弧焊电源。
The experiments show that the variable temperature signal can be detected and the welding time and traveling time can also be controlled in "step" TIG welding by this system.
经实验验证：该系统能够检测到熔池的温度场变化信号，并能控制步进式TIG焊的焊接时间和行走时间。
In this paper the extrusion pressure between the stud and the workpiece during stepping arc stud welding process is acted as the controlled variable so as to control the stud plunge depth.
基于步进式电弧螺柱焊方法，以焊接过程中螺柱与工件之间挤压力为控制量，实现对螺柱送进深度的控制。
In this paper, the welding problem of two half-planes with anisotropic media is considered. By means of the complex variable method, the stress distribution is given in closed forms.
本文利用复变函数方法，研究了两个各向异性半平面的焊接问题，得到了应力分布的封闭形式解。
The power can output several kinds of welding current such as variable polarity square wave AC, DC and pulse current etc.
该电源可实现变极性方波交流、直流、脉冲电流等多种输出。
The results showed that the backside melting width can be predicted by the network model during P-GMAW bead welding the thin plate when the welding parameters were input variable.
结果表明，在P -GMAW薄板堆焊中，以焊接规范为输入变量，利用该网络模型能很好的预测背面熔宽。
The variable polarity power supply can satisfy the welding process of the aluminum and aluminum alloy by adjusting the current frequency, positive and negative current time and amplitude value.
调节正负半波的幅值、频率及占空比能满足铝及铝合金的焊接工艺要求。
In this paper, a variable model of optimum droplet transfer mode for pulsed GMA welding using a steel electrode is developed on the principle of the micro-interference instability of magnetofluid.
前言：基于磁流体微扰动“失稳”的原理，建立了钢焊丝脉冲GMA焊最佳熔滴过渡形式的参数模型。
In variable plasma arc welding of aluminum, the behavior of variable polarity plasma arc is effected by pilot arc.
在铝合金变极性穿孔焊接的工艺中，维弧对变极性电弧的行为有着重要影响。
Pulse current, arc polarity, arc voltage and metal transfer of variable polarity pulse MIG welding are controlled by 80c196kc coordinately to implement the stable welding procedure.
单片机协调控制变极性脉冲MIG焊的脉冲电流及电弧极性、电弧电压及熔滴过渡频率，实现了稳定的焊接过程。
The controlling system of the variable polarity power source for TIG welding by microprocessor-80C552 is developed with flexible setting time and scope of the DCEP and DCEN.
开发了变极性TIG焊电源的微机控制系统，通过调节输出电流的正负半波时间、幅值获得不对称方波。
With smooth constraint condition of the welding pool surface and variable factor successive over relaxation(SOR) method, the height of welding p…
利用熔池表面光滑模型和变因子超松弛方法计算了熔池表面的高度。
According to the test, the welding interlayer temperature of X60 pipeline in the normal and low temperature is analyzed in order to study the influence of its variable range on welding quality.
通过采取焊前预热、控制焊接线能量和层间温度、焊后保温缓冷等工艺措施，并采用相应的检测方法，保证了胺液吸收塔的低温焊接质量。
When the setpoint of controlled variable varies, the controlling variable can be adjusted rapidly to maintain the dynamic stability of the welding process.
被控制量目标值变化时，控制量迅速随之调整，以保证焊接过程动态稳定。
When the setpoint of controlled variable varies, the controlling variable can be adjusted rapidly to maintain the dynamic stability of the welding process.
被控制量目标值变化时，控制量迅速随之调整，以保证焊接过程动态稳定。
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