PURPOSE: To remove easily the seizure of caliber end and to prevent edge mark by pressing a grinding wheel,having circular-arcuate surface corresponding to a groove of semicircular caliber-end of a finishing mill, against said caliber end with the aid of a spring, and grinding the caliber end.
CONSTITUTION: A grinding wheel 1 having circular-arcuate surface is attached to a bearing stand 2 which is supported by supporting rods 3, 3', and the length of the rods 3, 3' is made adjustable by inserting the rod 3' into the rod 3 and fixing them with a bolt 7. Further, the supporting rod 3' is pivotally supported 5 by a bed 6 and tilted by a spring 4. A wheel 1 holding jig constituted of above-mentioned parts is fixed to a mill housing 8 by bolts 9, and the wheel 1 is pressed by the spring 4 to closely engage with the semicircular caliber-end of the roll of a mill in a hot seamless steel pipe manufacturing line. Because the caliber end is always ground and produced seizure is immediately removed by the wheel 1, a succeeding steel pipe is prevented from generating edge marks.
WATANABE ISAMU
OKUJIMA KOUKI
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