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1. 发明授权

US4952773A Automatic arc-welding machine operating with rod electrodes and a preferred application thereof 失效
标题翻译：自动电弧焊机用棒电极操作，其优选应用
公开(公告)号：US4952773A
公开(公告)日：1990-08-28
申请号：US395787
申请日：1989-08-18
申请人： Kalman Orsos , Gerhard Dietrich , Alfons Berndl , Franz-Josef Kufner
发明人： Kalman Orsos , Gerhard Dietrich , Alfons Berndl , Franz-Josef Kufner
IPC分类号： B23K9/028 , B23K9/067 , B23K9/12 , B23K9/127
CPC分类号： B23K9/067 , B23K9/121
摘要： An automatic arc welding machine of the type which operates with rod electrodes. The electrodes (46), which are held in a welding head (28), are moved automatically with respect to the workpiece. The electrodes are moved longitudinally away from the workpiece in accordance with the arc voltage such that a certain arc length is sustained. After use they are automatically replaced with new electrodes. For this purpose there is provided an arc striking control by means of which the particular electrode (46) is placed on the workpiece with the current limited to a value below the selected welding current; the electrode is then raised from the workpiece by an amount corresponding to the predetermined arc length while the welding current is released, before the longitudinal movement of the electrode in accordance with the arc voltage begins. A precisely timed and accurately placed ignition is achieved in this manner, even if the location of the weld is covered with scale or slag.
摘要翻译：一种用杆电极操作的自动电弧焊机。保持在焊接头（28）中的电极（46）相对于工件自动移动。电极根据电弧电压纵向远离工件移动，使得能够维持一定的电弧长度。使用后，将自动更换新的电极。为此目的，提供了一种电弧触发控制，通过该电弧触发控制，特定电极（46）放置在工件上，电流限制在低于所选焊接电流的值; 然后在根据电弧电压开始电极的纵向移动之前，将电极从工件上升到对应于预定电弧长度的量，同时释放焊接电流。以这种方式实现精确定时和准确放置的点火，即使焊缝的位置被鳞屑或炉渣覆盖。

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