The blowing and pushing speed is determined according to the actual pipe bending situation to match the speed of the hydraulic pipe bender. At the same time, it should be checked whether the presetting value of the mandrel is suitable and corrections should be made if this is not practical. Based on the bending and cracking of the outer arc of the pipe, the cause should be carefully analyzed. First, make sure that the pipe has a good heat treatment condition, and the weld of the steel pipe should not be in the direction of the F1 and F2 forces as much as possible, that is, do not clamp it directly by the die and die of the bending wheel; check if the crimp die pressure is too high by excluding the pipe material factor and adjust to make it fit. For a recently used mandrel, check if its diameter is too large. If the diameter is too large, it should be ground and ensure that the mandrel and inner pipe wall are well lubricated to reduce elbow resistance and friction. between the inner wall of the pipe and the mandrel. Take appropriate measures to avoid shaking the machine, etc. In order to create wrinkles on the inside of the arc, appropriate measures must be taken depending on the position of the folds. If the front tangent point is wrinkled, the position of the mandrel should be adjusted forward so that the mandrel advances properly to provide acceptable support for the pipe. when the pipe is bent; when the back cutting point is wrinkled, the anti-wrinkle block must be installed, and the anti-wrinkle block must be installed in the correct position, and it can be attached to the platform with a pipe bending machine • The pressure of the die (wheel) must also be adjusted so that the pressure is suitable ...
