Steel pipe end straightening and rounding method

The invention discloses a steel pipe end straightening and rounding method. The three-point pressure rounding and straightening principle is adopted, and the size of supporting dies on the lower portion is the same as the outer diameter of a steel pipe; under the action of a hydraulic mechanism or a screw mechanism, a pressing block on the upper portion is pressed downwards slowly, the downward pressing amount is controlled precisely through a calibrated scale and a pointer in the straightening and rounding processes, and the downward pressing amount is determined according to the specification, material, curvature and ovality of the steel pipe. By the adoption of the steel pipe end straightening and rounding method, the problems about the curvature and ovality of the pipe end of the steel pipe are solved, the straightening work and the rounding work can be completed well at a time through the calibrated scale, repeated operations are avoided, working time is saved, and working efficiency is improved.