Qingdao hoop bending machine straightening wheel straightening method: Generally, the wave-shaped straightening method is adopted, but the wave should not be too large. If the wave is too large, it will increase the traction resistance, causing the traction not to move, the traction wheel slips, and the steel bar breaks. After the steel bar is out of the barrel, if the head is tilted up, adjust the last set of wheels and press it down appropriately. If the steel bar is tilted down after exiting the barrel, adjust the last set of wheels to move upwards properly so that the bar is always out. The end is horizontal. When bending double ribs, if the outer steel bar comes out and the bending mandrel falls off, please press the outer wheel of the last set of pre-straightening wheels inward to make the double ribs move closer to each other. When bending larger stirrups, the bending speed should be slowed down accordingly. Adjustment of the bending mandrel: adjust the landing gear cylinder so that the upper apex of the bending mandrel is level with the lower edge of the wire barrel hole or the lower side of the wire barrel hole is 1-2mm.