The operation frame is a displacement machine that can accurately send the welding head (welding gun) to the position to be welded and keep it at that position or move the welding head along the set track with the selected welding speed.

(1) the welding machine of platform type operating frame can be moved on the platform when it is placed on the platform; the platform is installed on the vertical frame and can run along the track. The operation range of this kind of manipulator is large, and it is mainly used in the welding of outer ring seam and outer longitudinal seam. The platform welding operator can be divided into two types: single track trolley type and double track trolley type.

The monorail trolley type operator actually has a track, but the track is generally set on the column of the workshop. When the workshop bridge crane moves, it often causes platform vibration, which affects the normal operation of the welding process. The mobility, scope of use and use of the platform operator are not as good as the telescopic arm welding operator, and its application in China has been decreasing year by year.

(2) the welding trolley or welding machine head and welding gun of the telescopic operating frame are installed at one end of the telescopic arm, which is installed on the column through the sliding saddle, and can stretch left and right along the sliding saddle. The saddle is installed on the column and can be lifted and lowered along the column. Some of the columns are directly fixed on the base; some are installed on the base, but they can rotate; some are installed on the trolley that can run along the track through the base.

This kind of manipulator has good maneuverability and wide operation range. It can be used to weld the inner and outer circumferential seams, inner and outer longitudinal seams, spiral welds, as well as the inner and outer surfaces of the rotating weldments. It can also weld the horizontal and oblique spatial linear welds on the components. It is the most widely used welding manipulator at home and abroad. In addition, if the corresponding operation head is installed on the front end of the telescopic arm, grinding, cutting, painting, flaw detection and other operations can be carried out, which is widely used.