The result of the experiment showed that the fuzzy control technology is well compensatory to the penetration of welding bead . the equivalent circuit model established in saber is able to reflect the circuit in practice 实验结果表明,采用的模糊控制技术对焊缝熔深有较好的补偿性, saber仿真软件所建立的等效电路模型能够真实的反映实际电路。
As plasma , welding arc has well electric character . exterior magnetic field can affect shape and movement of welding arc . and the welding bead and drops transfer can also be changed to improve the welding process and advanced the productivity 电弧作为一种等离子体,具有优良的导电性,用外部磁场可以改变电弧的形态和运动特性,影响焊缝熔池和熔滴过渡形式,大大改善焊接工艺,提高焊接生产效率。
Seal the assistant who clears up machine being that one kind of new model is good be used for the stainless steel project , equipment , what be come into being black solders road , handles a simplicity when it can help your relaxed treatment argon arc soldering machine flow welding stainless steel , grab the head as long as using this machine to control touch choose clear up liquid saying that the surface is light in soldering clean , the black welding bead is immediately disappear , bright if new , hurt bright stainless steel surface face by no means , clear up the queen using wet fabric to clean again , outside , stainless steel not getting rusty , not being suffused with yellow , be quick , more beautiful , more economical than using acid - washing method speed such as cream and polishing 焊缝清理机是做不锈钢工程、设备的又一种新型好帮手，它可以帮助您轻松处理氩弧焊接机烧焊不锈钢时所产生的黑色焊道，操作简单，只要用本机操纵抢头沾取清理液在焊道表面轻轻擦拭，黑色焊道即刻消失，光亮如新，决不伤害不锈钢表面亮面，清理后再用湿布擦拭，不锈钢表面不生锈、不泛黄，比用酸洗膏和抛光等方法速度更快、更美观、更经济。
The variable polarity power supply circuit uses two stages full - bridge inverter , the former inverter is regarded as a constant - current source with fast dynamic response , and supplys energy for the second one , and the latter one is to produce variable polarity current excellently , and low - frequency pulse current by variable polarity power supply is used to reduce input energy and control the shape of weld bead while welding . a series of high - frequency pulse current is superposed on direct - current - electrode - negative ( dcen ) current through the high - frequency pulse power supply , which is used to compress the arc and improve process of crystallization 其中变极性电源采用二次全桥逆变结构,一次逆变提供快速的响应速率并给二次逆变提供能量,二次逆变提供良好的变极性性能,使输出能量最优化,并用其低频电流特性减小电弧线能量,控制焊缝成形;高频脉冲电源提供的高频电流叠加在反极性电流dcen上,利用电流的高频特性压缩电弧,改善焊缝金属结晶过程。
Transitional feature of the arc and metal droplet in the welding process with steam shielded arc is investigated by means of analysing the waveforms of welding voltage and current under different welding regimes and it is found that there are two types of arc process behavor ? " arc starting - arc blowing out - short - circuiting " and " arc - starting - short - circuiting " . under the condition of constant diameter of welding wire and its feeding speed , the arc process behavor can be changed by adjusting the inductance of welding circuit as well as the voltage of power supply . if arc process behaves as alternative process of " arc starting - arc blowing out - short - circuiting " with minimum time duration of arc blowing out and maximum frequency of short - circuit transition , the welding process will be stable with less spatter and smooth weld bead 通过分析不同焊接规范下的焊接电压和电流的波形.研究了水蒸气保护下电弧及熔滴过渡的特点，发现其电弧过程行为有“燃弧?熄弧?短路”和“燃弧?短路”两种形式.在焊丝直径和送丝速度一定的情况下，通过调节焊接回路中的电感量和电源电压，可以改变电弧的过程行为形式.若电弧过程呈“燃弧?熄弧?短路”交替进行，并且熄弧时间最短时，短路过渡频率最高，在这种情况下，飞溅小，焊道成型好，焊接过程稳定
The former results show that it is one of the most effective measures to reduce spatter and improve weld bead for the inverter controlled by double - slope waveform control method . but , it is too difficult to meet the requirement at all welding parameters for welding inverter based on electron inductor . because of the limitation of processing speed and handling ability , the type of inverter based on micro control unit couldn ’ t make full use of those advantages such as rapid dynamic response and high control precision 以往的研究成果表明,采用短路电流双斜率上升波形控制的逆变焊机是减少co2焊飞溅、改善其焊缝成型的有效途径之一,但是基于电子电抗器控制的波控逆变焊机很难兼顾全规范区间的工艺性能,而基于单片机控制的逆变焊机由于运算速度和处理能力的限制也没有完全发挥出波控逆变焊机动态响应快、精度高的优点。
