| 摘要 |
PROBLEM TO BE SOLVED: To improve workability and to correct dispersion of length of a steel pipe P by simultaneously performing chamferings of the inner surface, the outer surface, and the end surface of the steel pipe P cut in a fixed size. SOLUTION: The steel pipe P to be chamfered is corrected in relation to length direction position by end surface guides 35R, 35L, and fed to a chamfering position. The proximities of both ends are restricted by clamp mechanisms 20. A chamfering head 10 having an inner surface chamfering tool 12, an outer surface chamfering tool 13, and an end surface chamfering tool 14 is pressed to the steel pipe P and rotated at a high speed, thereby simultaneously performing chamferings of the inner surface, the outer surface, and the end surface.
|
