Welding rotators are often used for the welding of inner and outer circumferential seams and inner and outer longitudinal seams of cylindrical workpieces. There are many types of welding rotators, including self-adjusting, adjustable, flat-car, tiltable and anti-moving, etc. Type and the welding rotator are generally used through a combination of a driving wheel and a passive wheel, and for some irregular or too long and large objects, the design of the welding rotator needs to be customized and adopts a driving wheel and multiple passive wheels. Wheel combination use, etc. Now we will introduce the composition and classification of the welding rotator, to better use it in future production.
The welding rotator includes a base, a driving roller, a driven roller, a bracket, a transmission device, and a power device drive. The transmission device drives the active roller and uses the friction between the active roller and the cylindrical workpiece to drive the workpiece to rotate to realize displacement, which can realize the horizontal position welding of the inner and outer circumferential seams of the workpiece and the inner and outer longitudinal seams. The automatic welding equipment can realize automatic welding. , It can greatly improve the quality of welds, reduce labor intensity, and improve work efficiency. The welding rotator can also be used with manual welding or as a device for testing and assembling cylindrical workpieces.
Welding rotators are generally divided into three categories:
Self-adjusting welding rotator
The self-adjusting welding rotator is a displacement device that uses the friction between the active roller and the weldment to drive the workpiece to rotate. The swing angle of the wheelset can be automatically adjusted according to the diameter of the workpiece, and the center can be automatically adjusted. It is mainly used for the assembly or welding of cylindrical workpieces such as pipes, containers, boilers, and oil tanks. When matched with a welding manipulator and welding power source, it can realize the welding of the inner and outer longitudinal seams and the inner and outer circumferential seams of the workpiece.
Adjustable welding rotator
The adjustable welding rotator consists of a driving wheel and a driven wheel. The active roller operation is driven by two motors respectively. Through the speed regulating motor, the speed regulating controller realizes step-less speed change through frequency conversion speed regulation or electromagnetic speed regulation. The linear speed of workpiece rotation is 6-60 meters/hour, which can meet the needs of manual welding, automatic surfacing welding, automatic submerged arc welding, etc., as well as various riveting of workpieces. The distance between the main and driven rollers can be adjusted by screw or screw division to meet the welding requirements of workpieces of different specifications.
Anti-channeling welding rotator
The anti-channeling welding rotator is made into a liftable type based on the adjustable roller rack, the roller of the driven rack is made up and down, the photoelectric encoder is used to detect the amount of movement of the workpiece, and the system controller controls the lifting of the driven roller. The displacement detection frame is placed on one end of the workpiece, and the detection wheel is pressed on the end surface of the workpiece (the end surface must be processed). The detection wheel can rotate with the workpiece. When the workpiece moves axially, the detection wheel will follow the workpiece, and the photoelectric coding.
The detector detects the movement amount 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 time of the driven roller according to the amount of movement, and control up or down according to the direction of movement. The amount of movement of the workpiece always fluctuates between -1.5mm and +1.5mm, so that the movement of the workpiece is limited to a certain range, which can meet the needs of welding.