CENTERING DEVICE OF STEEL PIPE IN SCREW CUTTING DEVICE AND SCREW CUTTING DEVICE OF STEEL PIPE

摘要

PROBLEM TO BE SOLVED: To fix a steel pipe so as to prevent its center axis from deviating from the center axis of a cutting means, by lifting a height of a receiving base so as to conform a center axis height of the cutting means to a center axis height of the steel pipe. ;SOLUTION: Before screw cutting, a height of a receiving base 18a to 18d, based on information from a central computer, so as to place a center axis of a carried in steel pipe lower than an extension line of a center axis of a screw cutting machine 10, is automatically adjusted by a moving amount control device 21. Based on length information of the steel pipe, the receiving base 18b most adjacent to a lengthwise direction gravitational center position M of a steel pipe P is moved automatically to the lengthwise direction gravitational center position by the moving amount control device 21. When the steel pipe P is fed to a receiving base side of a screw cutting device, by an output of the moving amount control device 21, a drive means is adjusted, so as to conform the steel pipe to the lengthwise direction gravitational center position M, a height of the receiving base 18b is made higher than the other receiving base, to be matched with a height level of a center axis of a screw cutting base 10. A tip end of the steel pipe P is centered so as to conform to the center axis of the screw cutting base 10 by a centering device 16.;COPYRIGHT: (C)1997,JPO