Welding rotator is a device that drives cylindrical (or conical) weldment to rotate by friction between weldment and driving roller. It is mainly used in some large machines of heavy industry. There are many different types of welding rotator to meet different welding conditions and requirements.

Among them, the self-adjusting welding rotator is a kind of displacement equipment which uses the friction between the active roller and the weldment to drive the workpiece to rotate. According to the diameter of the workpiece, the swing angle of the wheel set can be adjusted automatically, and the center can be adjusted automatically. It is mainly used for pipe, container, boiler, oil tank and other cylindrical workpiece assembly or welding. When it is matched with welding operator and welding power supply, it can realize the welding of inner and outer longitudinal seam and inner and outer circumferential seam of workpiece.

The adjustable welding roller frame is composed of a driving wheel and a driven wheel. The driving roller is driven by two motors respectively. Through the speed regulating motor, the speed regulating controller realizes stepless speed change through frequency conversion or electromagnetic speed regulation. The linear speed of workpiece rotation is 6-60m / h, which can meet the needs of manual welding, automatic surfacing, automatic submerged arc welding and other different welding, as well as various riveting of workpiece. The distance between the driving roller and the driven roller can be adjusted by screw rod or screw to meet the welding requirements of different specifications.

The non self adjusting welding roller carrier adjusts the spacing of rollers by moving the roller seat on the support. The anti channeling welding roller carrier is based on the adjustable rotator, the roller of the driven frame is made into the lifting type, the photoelectric encoder is used to detect the displacement of the workpiece, and the system controller controls the lifting of the driven roller.

The displacement detection frame is placed at one end of the workpiece, and the detection wheel is pressed on the end face of the workpiece (the end face must be processed). The detection wheel can rotate with the workpiece. When the workpiece moves axially, the detection wheel will follow the workpiece. The photoelectric encoder detects the displacement and direction of the workpiece, and its signal is input to the system controller for processing.

The controller will adjust the lifting stroke, lifting speed and lifting interval of the driven roller according to the magnitude of the displacement, and control the lifting or lowering according to the direction of the displacement. The displacement of the workpiece always fluctuates between - 1.5mm and + 1.5mm, so that the displacement of the workpiece is limited in a certain range, which can meet the needs of welding.

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