PIPE POLISHING MACHINE

The present invention relates to a pipe grinding device which is composed of a supporting roller where a work condition is not changed according to standard replacement of a processed product, a quality of grinding is excellent, and productivity is high by automatically polishing and grinding a processing surface of the processed product in grinding work when the pipe grinding device processes a surface of the processed product by being point contacted with the processed product while being moved from right to left. According to the present invention, the pipe grinding device comprises: a main body part which is transferred along a length direction since a processed product in a cylindrical form enters one side; an automatic supplying part for successively supplying the processed product which is arranged on top of each other in one side of the main body part one by one; a polishing part for grinding in order by connecting one working part for performing grinding work and polishing work of the processed product which is transferred according to the main body part at the same time in multiple steps; an interval adjusting part which is composed of multiple rollers installed in the bottom to rotate easily the processed product each working part; a grinding part arranged in one side of each working part to point contact grind with a surface of the processed product by rotating a grinding stone arranged in the lower end while moving the processed product from right to left in a state of pressurizing the processed product from an upper side; and a discharging part for discharging the processed product, where grinding work and polishing work are completed, in order one by one.