1. Strip arching is an important factor in the formation of discord. In the forming process of spiral welded pipe, the camber angle of the steel strip will continuously change the shape, resulting in the change of the gap of the weld seam, resulting in open weld, wrong side and even side deviation.
2. The head and tail butt welding seam of the strip has a large reinforcement. If it is not handled properly during forming, it is likely to form a large wrong edge.
3. Because the lack of fine cutting is the reason for the low precision of the shape and dimension of the strip head and tail, simply form the hard bend of the butt strip to form the side.
4. Poor strip edge condition is another important reason for the formation of wrong edges.
Therefore, by observing the warpage condition of the strip steel after curling, after controlling the vertical roller, the disc can be cut and part of the warping angle can be removed, forming successive manipulations and correcting the warpage of the strip, which is to reduce the deviation in the production process. Effective way to the side.
The processing procedures for producing spiral steel pipes have been completed on the wrong side as follows:
1. Polish the discordant position and then weld it
2. If the situation is often on the wrong side, the equipment can be replaced.
