AUTOMATIC STEEL PIPE INTERNAL DEBURRING DEVICE

PURPOSE:To make deburring operation for a steel pipe inner surface performable in an efficient and automated manner even if the pipe is not just roundness, by repeatedly shifting a ring buff, which revolves as rotating on its axis around an end part of the steel pipe surface, in the axial direction. CONSTITUTION:First of all, a teel pipe 3 is locked to a locking clamp block 1 by tightening a handle 7, then a motor 17 for rotation is driven and a ring buff 13 on an almost nearly axis of the steel pipe 3 is rotated on its own axis. Next, a motor 24 for revolution is revolved, while a transfer block 14 is shifted to the extent till a guide roll 4 touches an inner surface of the steel pipe 3 as balancing it by feeding air to a copying air cylinder 8 and a balancing air cylinder 15, whereby a revolving shaft block 18 is repeatedly shifted in the axial direction by driving an axial shifting motor 27, thus the inner surface of the steel pipe 3 is polished by the ring buff 13. And, when a circumferential surface of the guide roll 4 hits the inner surface of the steel pipe 3, the roll 4 rotates and therefore at a time when this rotation is detected by a detector 11, polishing comes to an end.