HY-6 drill pipe inner hole grinding machine is auto controlled by PLC, used in grinding upsetting transitional zone (caused by frition-welding) of the drill pipe inner bore. Compared with manual repairing machine, it can reduced labor intensity and reduce the dust harm to operator, protect the health of worker, improve working efficiency and grinding quality. 

The machine is combined by base, liner rail, working table, greending wheel, X-Y-Z direction moving mechanism, angle-swing mechanism, grinding wheel spindle, main motor, electric control system, pneumatic control system etc. It has the advantage of reasonable structure, easy to operate, running credibility, long life and can long time running, lowering the labor intensity