利用该数学模型模拟焊接电流、弧长和焊丝伸出长度随时间的变化规律。
It is based on the mathematical model of GMA welding system and Halmoy's wire melting model.
我可能必须重新焊接管顶端的垂直领导管并增加一些长度为更多的步行刀片清除。
I may have to re-weld the top tube for vertical head tube and add some length for more foot to blade clearance.
但是由于焊接结构应力场的复杂性，使得精确计算拘束力、拘束长度和反变形量值很困难。
But, it is very difficult to calculate values of restraint, restraint length and reverse deformation accurately, because of the complication of stress fields in welded structure.
沿焊接网的锚固长度的焊接点强度必须足够对抗设计应力。
P the strength of the welded joints along the anchorage length of welded fabric shall be sufficient to resist the design forces.
管母的单根长度有限，在施工中要将几根管母焊接起来，焊接的数量较多。
Because of length limit, the single tubular bus requires welding several tubular buses during construction, resulting in large amount of welding load.
扁钢与扁钢焊接应采用搭接焊，搭接长度至少为扁钢宽度的2.5倍，且至少3边焊接。
The overlapped length should be at least 2.5 times of the width of the flat steel, and at least 3 edges need to be welded.
如果焊机不能置于靠近焊接区，必须提供足够长度的焊接线以及接地夹。
In case the welding machine cannot be placed close to the welding area, enough cable length for both, the welding cable as well as the earth clamp has to be provided.
在焊接电流确定的条件下，引弧瞬间的焊机输出电压反映了焊接电缆长度、截面积以及地线连接情况等重要信息。
When welding current is fixed, some important information such as length and section area of welding cable, connection of ground wire can be shown by output voltage of instantaneous arc-striking.
结果表明：电流和电压对焊接温度场的影响最大，板材厚度其次，板材长度最小。
The results show that the current and voltage are the strongest factors, the thickness is stronger, and the last one is the length of the plate.
分析了手工下向焊、半自动焊、自动焊及特种焊等焊接方法的特点，在选择焊接方法时应考虑管道直径、壁厚、管道长度、设计条件、管子级别等因素。
The features of manual downhill welding, semiautomatic welding, automatic welding and other welding technologies like butt flash welding and laser beam welding (LEW) and so on are analyzed.
本文应用弹塑性弯曲理论提出了一种消除焊接对接接头角变形的平面外拘束力的计算方法，计算了极限拘束力、拘束长度和反变形的量值，并通过试验验证了方法的有效性。
By the theory of elastoplastic bend, this paper prowents a method to calculate out - of -- plane restraint and reverse deformation that are made use of to remove angle deformation in butt joints.
本文应用弹塑性弯曲理论提出了一种消除焊接对接接头角变形的平面外拘束力的计算方法，计算了极限拘束力、拘束长度和反变形的量值，并通过试验验证了方法的有效性。
By the theory of elastoplastic bend, this paper prowents a method to calculate out - of -- plane restraint and reverse deformation that are made use of to remove angle deformation in butt joints.
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