In the production process of spiral steel pipe, if the production process is not fair, the mechanical parameter setting is not appropriate, there will be signs of deviation, especially large diameter thick wall spiral steel pipe, which is often said to be wrong edge phenomenon.
The treatment plan for the thick-wall spiral steel pipe with wrong edges is as follows
1. Smooth the position of the wrong edge, and then repair welding
2. If there is often the wrong side of the state, can only replace the equipment.
It is necessary to explain the reason of the wrong edge after the occurrence of the wrong edge of the thick wall spiral steel pipe. The following is the common reason of the wrong edge.
1. The sickle bend of the steel belt is an important factor causing the wrong edge of the steel pipe. In spiral welded pipe forming, the sickle bend of the steel belt will keep turning into the mold Angle, resulting in the change of weld clearance, resulting in seam opening, wrong edge and even edge matching.
2. When the weld residual height of steel head and tail butt welding is large, it is easy to cause large wrong side if the punishment is not appropriate in the over-forming.
3. Due to the poor shape and dimensional accuracy of the non-edging steel head and tail, it is easy to cause hard bending of the steel belt and cause wrong edge when docking.
4. The edge of the steel strip is not safe is another important reason for the wrong edge.
Therefore, it is a useful measure to eliminate the wrong edge of steel belt scythe during production to observe the scythe environment of steel belt coil after unwinding and control and correct the scythe Angle of disc shears by controlling the vertical roll.
Post time: Feb-03-2023