High accuracy seamless steel pipe's four roller reducing mills

The utility model discloses a high accuracy seamless steel pipe's four roller reducing mills. The utility model discloses work frame number is 18, installs four rolls in every roll frame, the axis of four roll parts constitutes equilateral quadrangle, and the roll axis in the adjacent roll frame in front and back is mutual wrong 45 degrees, four motor mount pads of every roll machine shelf location, driving motor, transmission, roll, roll support bearing, roll position of axle are put hydraulic controller and are all installed on the motor mount pad, and driving motor passes through transmission and drives the roll rotation, the both ends of every roll set up roll support bearing respectively, and every roll support bearing connects a roll position of axle and puts hydraulic controller. The utility model discloses during the rolling not unidimensional hollow forging of four roll -type reducing mills, the frame of needn't changing planes as two roll -types or three -roll reducing mill, only need to change the roll can, roll diameter and frame thickness all very reduce, equipment volume ratio three -roll reducing mill reduces about 15%.