Method for reducing abrasion of ERW pipe in production

How to reduce the wear of ERW pipes in production and ensure the quality of welded pipes?

From the analysis data of ERW welded pipe waste, it can be seen that the roll adjustment process plays a very important role in the production of welded pipes. That is to say, during the production process, if the rolls are damaged or severely worn, some rolls in the unit should be replaced in time, or the entire set of rolls should be replaced for continuous and full production of a certain type of welded pipe.

When replacing the welded pipe, it is necessary to adjust the supporting roller accordingly to ensure the quality of the welded pipe. On the contrary, if the roll is not adjusted properly, it is likely to cause defects such as distortion, lap welding, edge undulation, indentation, scratches and even large ovals on the surface of the welded pipe and pipe body.

The following is an introduction to the operation method of roll adjustment that should be mastered when changing rolls.

In general, ERW pipe specifications should be changed and the entire set of rolls replaced. The steps to adjust the roller type are: firstly pull the steel wire at the inlet and outlet of the unit out of the center line and adjust it so that the pass pattern of each frame is on the center line, and weld the steel pipe manufacturer to make the forming line meet the technical requirements.

In order to ensure the welding quality of ERW welded pipes, the forming rolls, guide rolls, squeeze rolls, and sizing rolls need to be adjusted once after the rolls are replaced as required, and then the closed-hole type, guide rolls, and sizing rolls should be adjusted mainly. Squeeze rollers. The role of the guide roller is to control the direction of the weld seam and the height of the bottom line of the welded pipe, reduce the edge extension, control the springback of the edge of the tube billet, and ensure that the weld seam entering the extrusion roller is straight and without distortion.

In short, during the welding process of ERW welded pipe, when the welder is running at low speed, the pipe welder must pay close attention to the rotation of the rollers of each part of the welded pipe, and adjust the rollers in time to ensure that the welding quality and process size of the welded pipe meet the specifications.

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