Adjustable three-roller flattener

The utility model relates to an adjustable three-roll straightening machine, which is characterized in that mounting holes of convex shaped roller are arranged on the sidewalls of the two side-to-side sidewalls of the frame, two adjustable slide ways arranged in vertical are arranged at the upper part of the mounting hole of the convex shaped roller, the sliding bearing bases at the side-to-side of the upper roller are arranged in the slideway between the two adjustable slide ways, the upper roller is arranged in the sliding bearing base. A cylinder is arranged at the upper part of the sidewall, the lower end of the cylinder rod of the cylinder is connected with the upper part of the sliding bearing base of the upper roller, a bearing support rail arranged in vertical is arranged at the lower part of the mounting hole of the convex shaped roller, two bearings with adjustable-distance lower rollers are arranged on the bearing support rail, the front and the back adjustable-distance lower rollers are respectively arranged in the front and the back bearing support, the front and the back governing devices of the bearing support are respectively arranged at the front part and the back part of the frame. The utility model is a straightening equipment of pipes and rods with a high straightening precision.