METHOD AND PASS FOR STRAIGHTENING CYLINDRICAL ARTICLES Russian patent published in 1994 - IPC

FIELD: method and pass can be used for straightening cylindrical articles such as bars and pipes including those with convex surface irregularities. SUBSTANCE: angle of rolls I and II and a clearance therebetween are set to suit diameter of article 8. The distance between profiled entry portions 5 and 6 is set depending on height of irregularities 9 on surface of article 8. Irregularities 9 are deformed and article 8 is straightened by helical passage (longitudinal motion along arrow a and rotation along arrow b) of all portions of article, first profiled entry portions then basic ones. EFFECT: wider technological capabilities of process and higher standard of straightening cylindrical articles. 2 cl, 1 dwg