How To Straighten Square Rectangular Tube?

What are the methods of straightening square rectangular tube?

1. The cold adjustment method is generally used for square rectangular tube whose nominal side length is less than 50mm and whose bending degree is not large. According to different specific operation methods, it is divided into lever straightening method, hammer straightening method, and special straightening method table straightening method. In the lever straightening method, the bending part of the pipe is used as the fulcrum, and the force is applied to the force point by hand. When straightening, the fulcrum position must be constantly changed, so that the curved pipe can be straightened evenly without deformation. Hammer straightening method: This method is used for long pipes with small side lengths. When the bending of the square pipe is determined, place the pipe on two parallel square kinds of wood at a certain distance. One person stands at one end of the pipe to observe the bending part of the pipe, and the other person taps it with a hammer according to the instructions of the observer. After several repetitions Knock, and the pipe can be straightened.

2. Straightening method with special straightening table When the side length of the square rectangular tube is large but not more than 100mm, straighten it on the straightening table, place the bent part of the square tube in the middle of the two straightening blocks, Upward, the distance between the supporting blocks can be adjusted according to the length of the bending part of the rectangular tube, and then the screw is rotated to press down the pressing block and gradually press down the protruding portion. After repeated rotation and adjustment, the square tube can be straightened.

3. The straightening method of the large curved clip straightener is to use the sizeable curved clip straightener to move freely on the spot to straighten the bend of the square tube. The quality of the pipes straightened by the big bend card straightener is better, and other suitable straighteners can be made according to local conditions at the construction site. Square tube straightening can also be applied to hydraulic presses, manual presses, or jacks. The straightening of large-diameter pipe sections requires the use of pneumatic or hydraulic presses. The 30-ton vertical hydraulic press can straighten steel pipes with a diameter of 108mm and a wall thickness of 6mm. To straighten steel pipes with a diameter of 219mm and a wall thickness of 8mm, a 100-ton hydraulic press can be used to make pressed elbows. For larger diameter pipes, a 200-ton vertical hydraulic press is required.

The above is the method of straightening the square rectangular tube.