| 摘要 |
The invention relates to a cold metal transfer welding process, in which the welding process is defined by the cyclic alternation of an arc phase (36) and a short-circuit phase (39). According to the invention, during an arc phase (36), a welding rod (13) is displaced towards the workpiece (16) until it makes contact with the latter (16) and during the short-circuit phase (39) the welding rod displacement is reversed and the welding rod (13) is then moved away from the workpiece (16). The welding current (I) and/or the welding voltage (U) are controlled during the arc phase (36) in such a way that the welding rod (13) melts, forming a droplet and that during the short-circuit phase (39) a breaking of the short-circuit is suppressed by means of the welding current (I). The invention also relates to a welding installation for carrying out said welding method. The aim of the invention is to achieve optimal welding results using the smallest possible number of settings. To achieve this, a displacement frequency (40) of the welding rod (13) is set as a welding parameter by means of a control organ, said frequency being used to define the number of arc phases (36) and short-circuit phases (39) per second, and at least one additional welding parameter is set. A control unit (4) determines, sets and controls all other welding parameters that are required to achieve the predefined displacement frequency (40). |
