Title:
METHOD AND INSTRUMENT FOR DETECTING SHAPE OF WELDED PART AT BUTT-WELDING
Document Type and Number:
Japanese Patent JP3064072
Kind Code:
B2
Abstract:
PURPOSE: To secure detecting accuracy and to improve welding quality by measuring cross sectional shape of the welded line along the welded line from the front and back surfaces of the welded part after a butt welding is executed and a welded bead is trimmed and detecting dislocated rate and remaining bead in the welded part.
CONSTITUTION: After the facing end surfaces of the preceding steel strip 3 and the following steel strip 4 are butt-welded, the trimming is executed and the cross sectional shape at the welded part 5 after trimming is continuously measured from the front and back surfaces. Thereafter, these shape measured data are compared and calculated and the dislocated rate and the remaining bead of the preceding and the following steel strips are detected. Further, a shape measuring instruments 61, 62 arranged facing to the upper surface and the lower surface of the welded part just behind a bite of a trimmer in a steel strip welder and measuring the vertical cross sectional shape to the welded line in the welded part along the welded line, are provided. An information treating device 13 for detecting the dislocating rate and remaining bead in the preceding and the following steel strips by comparing and calculating the shape measured result and the thick informations of both steel strips, is arranged. By this method, the welded quality is secured and the welded breakage is prevented.
Inventors:
Tokiharu Okamoto
Yoshimi Fukutaka
Yoshimi Fukutaka
Application Number:
JP34005291A
Publication Date:
July 12, 2000
Filing Date:
November 29, 1991
Export Citation:
Assignee:
Kawasaki Steel Co., Ltd.
International Classes:
B21B15/00; B21C51/00; B23K9/025; B23K37/08; G01B11/24; G01B11/245; G01S17/08; (IPC1-7): B21B15/00; B21C51/00; B23K9/025; B23K37/08; G01B11/24; G01S17/08
Domestic Patent References:
| JP5115903A | ||||
| JP58049A | ||||
| JP4197523A | ||||
| JP4157091A | ||||
| JP49119430U |
Attorney, Agent or Firm:
Yoshikatsu Matsushita (1 person outside)