Title:
METHOD FOR MEASURING SHAPE OF END OF JOINT OF ROLLED MATERIALS IN CONTINUOUS HOT ROLLING
Document Type and Number:
Japanese Patent JP3689967
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reflect a joint status to a joint process early by obtaining an opening size based on passage time of the joint of rolled materials obtained by hot finish rolling facility and a detection signal of a plate width position and measuring an opening shape of an end of the joint.
SOLUTION: Steel pieces joined by a joining device 24 placed between an output of a rough roller 20 and an input of a finish roller 22 are successively rolled by the finish roller 22 to be a strip 18. The strip 18 passes through a plate thickness gage 26 and a plate width gage 28 to be measured in thickness and width. Since the smallest part in a fluctuation chart of the thickness and width corresponds to a joint, signals at plate ends which are raw signals of the thickness gage 26 and width gage 28 are respectively processed, thereby obtaining time when the joint passes through the thickness gage and time when the joint passes through the width gage. Then time required for an opening to pass through the thickness gage 28 is obtained from opening start time ts when a width position obtained by the width gage 28 begins to vary and opening end time Te, and an opening length l1 and an opening width l2 at both ends of the joint are obtained from these measures values.
Inventors:
Akira Torao
Makoto Okuno
Shoji Murayama
Junzo Nitta
Makoto Okuno
Shoji Murayama
Junzo Nitta
Application Number:
JP6269496A
Publication Date:
August 31, 2005
Filing Date:
March 19, 1996
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
G01B21/20; B21B1/26; B21B37/00; B21B38/02; (IPC1-7): G01B21/20; B21B1/26; B21B37/00; B21B38/02
Domestic Patent References:
| JP7164048A |
Attorney, Agent or Firm:
Satoshi Takaya
Keisuke Matsuyama
Tsuyoshi Makino
Keisuke Matsuyama
Tsuyoshi Makino