How To Reduce The Wear Of Welded Pipes And Ensure The Quality Of Welded Pipes?

Through the understanding of welded pipes, the roll adjustment process plays a very important role in the entire production process. That is to say, in the production process, if the rolls are damaged or worn seriously, it is necessary to replace part of the rolls on the unit in time, or to replace the entire set of rolls if a certain type of welded pipe has been continuously produced in sufficient quantity.

During the replacement process, it is also necessary to adjust the rolls accordingly in order to obtain good welded pipe quality. Conversely, if the rollers are not adjusted properly, it is likely to cause defects such as torsion, lap welding, edge waves, bulges, indentations, or scratches on the surface of the pipe body, and even large ovality.

Next, we will introduce to you the operation method of roll adjustment that should be mastered when changing rolls. First of all, we need to replace the stainless steel pipe specification, usually, the whole set of rolls is replaced. The steps for roll adjustment are as follows: first use a steel wire to pull a center line from the entrance to the exit of the unit, adjust so that the passes of each frame are on a center line, and make the forming bottom line meet the technical requirements.

After the rolls are replaced according to the requirements, in order to ensure the welding quality of the welded pipe, it is necessary to make a comprehensive adjustment to the forming rolls, guide rolls, extrusion rolls, and sizing rolls, and then focus on the closed pass of the forming rolls, guide rolls, squeeze roll adjustment. Among them, the role of the guide roller is to control the seam direction of the welded pipe and the height of the bottom line of the pipe blank, relieve the edge extension, control the rebound of the edge of the pipe blank, and ensure that the pipe seam is straight without twisting and entering the extrusion roller.

In a word, during the welding process of welded pipes, when the welding unit is running slowly, the staff needs to pay close attention to the rotation of the rolls in each part and adjust the rolls at any time to ensure that the welding quality and process size of welded pipes meet the specified requirements.