Kazuhito Kenmochi
Kazuhito Kenmochi, Chiyoda-Ku Tokyo JP
Patent application number | Description | Published |
---|---|---|
20100107725 | CALIBRATION METHOD OF ULTRASONIC FLAW DETECTION AND QUALITY CONTROL METHOD AND PRODUCTION METHOD OF TUBULAR BODY - An ultrasonic flaw detection is performed to a welded portion | 05-06-2010 |
Kazuhito Kenmochi, Chiba-Shi JP
Patent application number | Description | Published |
---|---|---|
20100064495 | QUALITY CONTROL METHOD AND MANUFACTURING METHOD FOR PIPE - According to the present invention, penetrators can be adequately determined as flaws. In particular, a welded zone of a pipe is subjected to ultrasonic flaw detection at least in a pipe axial direction, and the quality of the pipe is evaluated using observed values in units of a predetermined area in a pipe thickness direction and the pipe axial direction. The length of one side of the predetermined area is an ultrasound beam width or more and a pipe thickness or less. The quality of the pipe can be evaluated while shifting the predetermined area in the pipe axial direction by using an average value of the observed values within the predetermined area. The length of one side of the predetermined area can be made an ultrasound beam width or more and a pipe thickness or less. | 03-18-2010 |
20100101326 | ULTRASONIC FLAW DETECTION APPARATUS AND ULTRASONIC FLAW DETECTION METHOD FOR PIPE - The present invention has a structure capable of detecting the scattered-type penetrator having oxides each with the size of several μm sparsely and widely dispersed. Specifically, the structure includes a wave transmission unit | 04-29-2010 |
Kazuhito Kenmochi, Chiba JP
Patent application number | Description | Published |
---|---|---|
20100032048 | ELECTRIC RESISTANCE WELDED STEEL PIPE WITH EXCELLENT WELD TOUGHNESS FOR LINE PIPE - In an electric resistance welded steel pipe with excellent weld toughness for a line pipe, the area fraction of minute defects each having a maximum length of less than 50 μm in a projection plane of an electric resistance welded seam is in the range of 0.035 to 0.000006, and the absorbed energy at −40° C. measured by a method for an impact test of metallic materials is | 02-11-2010 |
20100059484 | METHOD AND EQUIPMENT FOR MANUFACTURING ELECTRIC RESISTANCE WELDED STEEL PIPE - A method for manufacturing an electric resistance steel pipe having a good toughness at a welded portion is provided, the method being capable of stably manufacturing an electric resistance welded steel pipe having a desirable toughness at a welded portion although a steel strip serving as a base material has a dimensional variation. Groove shapes and are applied to edges and of an open pipe, an edge shape monitor continuously captures images of the edges and immediately before electric resistance welding, and the captured images are input to an arithmetic processing unit for image processing. | 03-11-2010 |
Kazuhito Kenmochi, Tokyo JP
Patent application number | Description | Published |
---|---|---|
20080209715 | Manufacturing Equipment of Electric Resistance Welding Pipes Having Excellent Characterization of Welded Seam - Manufacturing equipment of electric resistance welding pipes is provided in which lateral edges of a strip for an electric resistance welding pipe is shaped with appropriate tapering immediately before electric resistance welding so that welding quality is kept excellent. Cutting or shaving means is provided after a leveler. At least one finpass forming stand is provided which includes a fin having tapering having at least 2 stages. | 09-04-2008 |
20080230586 | Method of Manufacturing Electric Resistance Welding Pipes Having Excellent Characterization of Welded Seams - A method of efficiently manufacturing electric resistance welding pipes having excellent characterization of welded seams is provided, by which each lateral edge of a rounded strip immediately before electric resistance welding is securely shaped with desired tapering flexibly in response to change in strip thickness, so that welding quality may be kept to be excellent. A method of manufacturing electric resistance welding pipes, in which a strip is subjected to forming, then edges thereof are formed to substantially face each other, and then the edges are subjected to electric resistance welding to form a pipe, wherein an edge and an edge opposed thereto at one of an upper-surface side and a lower-surface side of the strip are shaped with tapering before the forming by means of cutting or shaving, or finpass forming. | 09-25-2008 |