Views: 0 Author: Joy Publish Time: 2025-04-10 Origin: Site
1. The straight seam steel pipe and the weld are bent in the same direction
Reason: The weld is not properly normalized, there is thermal stress on one side of the pipe, and the weld bends in one direction after cooling.
Solution: (1) Adjust the middle roller to increase the deflection curve appropriately; (2) Straighten twice; (3) When the pipe cannot be straightened directly, the overall temperature of the pipe.
2. Irregular bending of the straight seam steel pipe
Reason: a. Inconsistent pressure between the three rollers; b. Severe wear of the straightening roller.
Solution: Check whether the upper straightening roller is loose, and straighten the contact line length between the three channels with the sample rod.
3. The length of the straight seam steel pipe is greatly shortened.
Reason: The roller pressure angle difference of the three straightening rollers is too large, and the straightening pressure is large.
Solution: Adjust the roller pressure angle as much as possible to keep it consistent; adjust the straightening pressure appropriately.
4. One end of the straight seam steel pipe is bent
Reason: The distance between the rollers is too large.
Solution: Select a small-pitch straightening machine suitable for the corresponding pipe diameter.
5. The head of the straight seam steel pipe is not round.
Reason: The contact distribution or overlap between the three straightening rollers is inappropriate or inconsistent, and the pressure of the rollers is too large.
Solution: Properly adjust the angle between the rollers and adjust the pressure from the rollers to the pipe.
