Development of Tube-end Sharpening Process and Application to Manufacture of Φ473.08 mm×11.05 mm Oil Casing

Briefed in the paper are the principle, the function and the control method of the technology for sharpening both head end and tail end of the pipe, focusing on the development and application thereof concerning manufacturing the Φ473.08 mm×11.05 mm oil casing.The actual application result shows that owing to the adoption of the said technology, the thickened lengths of both the front end and rear end of the Φ473.08 mm×11.05 mm oil casing are obviously reduced, and in turn the crop lengths are reduced, having resulted in cut down of the cropping rate from the original 14.85% to 12.00%, and accordingly increase of the yield by 2% approximately.