US 7,320,237 B2
Method for measuring misalignment of continuance mill and apparatus for measuring the same
Hiroshi Kubota, Wakayama (Japan); and Youichi Suzuki, Wakayama (Japan)
Assigned to Sumitomo Metal Industries, Ltd., Osaka (Japan)
Filed on Apr. 07, 2006, as Appl. No. 11/399,324.
Application 11/399324 is a continuation of application No. PCT/JP2004/014826, filed on Oct. 07, 2004.
Claims priority of application No. 2003-348790 (JP), filed on Oct. 07, 2003.
Prior Publication US 2007/0036426 A1, Feb. 15, 2007
Int. Cl. B21B 31/06 (2006.01); B21C 5/00 (2006.01); G01B 11/00 (2006.01)
U.S. Cl. 72—10.7  [72/10.1; 72/13.4; 72/31.08; 72/240; 356/153] 20 Claims
OG exemplary drawing
 
1. A method for measuring a misalignment amount of caliber profile formed by rolling rolls mounted at each of stands that constitute a continuance mill, comprising the steps of:
disposing a reference means, whose positional relationship to a pass-line of said continuance mill is determined in advance, at each space between any two adjacent stands;
taking images of both said caliber profile, formed by rolling rolls mounted onto said each stand, and said reference means within the same visual field;
calculating a relative position corresponding to said pass-line within the above taken image based on the region corresponding to said reference means within the above taken image;
calculating a relative center position of the region corresponding to said caliber profile within the above taken image; and,
calculating a misalignment amount of said caliber profile based on the relative center position thus calculated and the relative position corresponding to the pass-line thus calculated.