| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.4 ( December 1981 ) Special Issue on Steel Pipe ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of On-line Wall Thickness Gage for Seamless Steel Tubes
Yutaka Funyu, Tadashi Okumura, Itsuo Matsuoka, Shoichi Murakami |
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Synopsis : Through the joint efforts of Kawasaki Steel Corporation and Fuji Electric Co., Ltd., an on-line wall thickness gage was successfully developed for the first time in the world, and introduced into the medium diameter seamless tube mill of Kawasaki Steel's Chita Works. The gage is of the multi-beam type utilizing Α rays, with its epoch-making feature for measuring the wall thickness of pipe to an accuracy of 0.1mm and a response speed of 0.1 sec. with no physical touch to the pipe and by continuously scanning multiple points on the circumference of the pipe over its entire length while it is still hot. With the introduction of this equipment, the rolling line has been automated to a great extent, and the instant feed back of measured values to the mill by the process computer has resulted in marked improvements in quality and yield. |
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