Sharpening machine for steel tube excircle

The utility model provides a sharpening machine for steel tube excircle, which comprises a motor. A shaft of the motor is connected with an input shaft of a speed reducing machine, a transmission wheel on an output shaft of the speed reducing machine is connected with another transmission wheel through a transmission belt, a plurality of straight rollers are mounted on a shaft of the another-transmission wheel, and a plurality of tapering rollers are mounted on the opposite surfaces of the straight rollers; and the sharpening machine further comprises another motor, a third transmission wheel mounted on a shaft of the motor is connected together with a fourth transmission wheel mounted at one end of a grinding wheel shaft through another transmission belt, a grinding wheel is mounted at the other end of the grinding wheel shaft which is mounted at the front part of a bracket, and the back part of the bracket and a height adjusting device for the grinding wheel are mounted together. By adopting the sharpening machine for the steel tube excircle, the outer surface of a steel tube is uniformly ground, the grinding effect is good and the work efficiency is high. The sharpening machine can be utilized to perform the sharpening for shatter crack, pockmark and other defects on the outer surfaces of a stainless steel tube, an alloy-steel tube and a straight welding tube, and also can serve as equipment for the excircle sharpening and renovating of various scrap steel tubes and for the excircle rust removing of various steel tubes.