Popular knowledge of the welding rotator

The following is a brief but hopefully useful insight into welding rotators that will seek to give you at least a basic understanding of it and its applications.

This passage is going to talk about the followings of welding rotator:

1) Introduction to welding rotators

2) Welding rotators are also commonly referred to as roll rotators or tank rotators

3) Conclusion

1) Introduction to welding rotators

Welding rotators or turning rollers, sometimes referred to as useful accessories for welding fabrication shops, are designed to stay in place and rotate heavy cylindrical parts around a horizontal axis, rotating at a constant and steady speed in front of the weld head.

Alternatively, they can be rotated gradually until they reach the desired position and then locked into place for longitudinal welding using a weld head mounted on a moving carriage.

Turning rolls allow circumferential welding in the vertical plane. They are also used for overlay welding (cladding) or deposition by welding a filler metal with useful properties to the outer or inner surface of a hollow cylinder.

Turning rolls are usually arranged in groups comprising a pair of identical rolls, one of which is rotated by an electric motor through a reduction gearbox, known in the power or drive unit, while the other is idle, so arranged that the distance between the rolls can be adjusted to accommodate cylinders of different diameters, and mounted on a simple shaped assembly frame.

Usually, a pair of such frames must be arranged on the shop floor at a certain distance from each other to accommodate the cylinders to be welded.

Supportable weight capacity and diameter are the main parameters that define the rotator. Other characteristics include wheel and surface materials, available power and surface speed.

Before the welding operation begins, free rotation of the parts on the rolls should be determined to verify that no protrusions interfere with the movement. Longitudinal weight distribution should also be checked to prevent overloading.

Special care should be taken to avoid instabilities that could cause the part to tip over. Minor errors in positioning may involve translation of the workpiece along its axis.

The absence of parallel or unsquared steering rolls may cause dragging forces that can move the workpiece unpredictably.

2) Welding rotators are also commonly referred to as roll rotators or tank rotators

Welding rotators are used primarily in the petrochemical, onshore and offshore oil and gas industries, conventional power and nuclear industries, and many other manufacturing industries that require rotation of pipes or vessels for semi-automatic welding processes. They are available in two different types - self-aligning and conventional rotators. Both welded rotor types can be equipped with integral bogies or mounted on bogies to allow the rotor section to be driven along the track. Welded rotors appear nominally in sets or pairs and consist of a drive section and a freewheel idler section.

3) Conclusion

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