Straightening method of dsaw pipe

Keywords:dsaw pipe, straightening
Straightening method of dsaw pipe:

One, dsaw pipe bends in the same direction

Cause: weld normalizing is insufficient, and the tube has thermal stress on the weld side, thus bending in one direction after cooling.
The solution: 1,adjust the middle roller, appropriately increase the deflection curve; 2, twice straightening; 3, in the time can not be directly straightened, the overall tempering of the pipe.

Two. dsaw pipe is unrule bending
Reason: 1. The pressure between the three rollers is inconsistent; 2. Straightening roller wear larger.
The solution: Check the adjustment of the straightening roller is loose, with the sample rod straighten the length of the contact line between the three.

Third, dsaw pipe is shorter length
Reason: the difference between the three roller straightening roller angle; straightening pressure larger.
The solution: adjust the roll angle, as far as possible consistent; proper adjustment of straightening pressure.

Four. dsaw pipe is at a head of bending
Cause: the spacing between the rollers is too large.
The solution: use to adapt to the appropriate diameter of the smaller pitch straightening machine.

Five. the head of dsaw pipe is not round
Reason: the contact phase between the three straightening rollers is misaligned or overlapped, and the roller pressure is too high.
Solution: appropriate adjustment of the angle between the roller and roller, roller pressure on the tube.

With the development of science and technology, more new technologies have been applied in steel tube straightening machines. Such as a company to improve and be applied seven-roller type straightening machine, model 3-1-3 pipe straightening machine. It uses completely different from the usual six-roller straightener structure, to solve the adjustment of the leveling roller group in the circumferential direction. Characterized in that the driving roller is adjusted by adjusting the inclination of the iron to adjust its height so that the three straightening rollers 120 ° in the circumferential direction can be adjusted radially, while the straightening center line is always unchanged, the advantage is that the structure Simple and easy to adjust, the tubing is evenly pressed on the circumference. Therefore, the high precision straightening, good quality, and applicable specifications of large amplitude.

dsaw pipe

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