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1. 发明专利

JP2000334564A FULLY AUTOMATIC PIPING WELDING DEVICE 失效
公开(公告)号：JP2000334564A
公开(公告)日：2000-12-05
申请号：JP14877899
申请日：1999-05-27
申请人： JGC CORP , NIKKI CONSTRUCTION CO LTD , AIKO ENGINEERING KK
发明人： INOUE KAZUMASA , TAKEUCHI ITSURO , FUJISAWA HIROSHI , KOIKE MICHIHIRO , AKIYOSHI KOJI , IGARASHI MIKIO , YAMAUCHI SHINYA , HIRASAWA YOSHIHIRO , MORITA MEITOKU
IPC分类号： B23K37/02 , B23K9/00 , B23K9/028 , B23K9/12 , B23K9/127 , B23K37/053 , G21C19/02
摘要： PROBLEM TO BE SOLVED: To enable one worker to consistently perform works from an auto matic inspection to automatic welding, which are suitable for the high quality welding of piping having a small diameter at a narrow place. SOLUTION: The tube edge holding mechanisms 1, 2 of piping 9A, 9B are connected with connecting bars 3 constituted by putting plural bars in parallel, and an inspection welding head 4 movable on the connecting bars 3 is provided. The tube edge holding mechanisms are provided with means for holding a tube shaft at a specific position and fixing the edges of the piping regardlessly of a tube diameter, and the positions of the tube edge holding mechanisms are made adjustable in the X, Y and Z directions to the connecting bars. The straight line drive means of a fixing part and the rotating drive means 8 of a rotating part are given by the inspection, welding head to the fixing part 41 moving on the connecting bars and the rotating part 42 rotating around the shaft of the piping. A groove inspection sensor 5 for inspecting a gap between butted grooves and the apparent shift of a shaft and a TIG welding torch 6 are mounted on the rotating part.

2. 发明专利

JP2002131853A METHOD OF PRODUCING FILM MARK FOR INSPECTING RADIATION TRANSMISSION 失效
公开(公告)号：JP2002131853A
公开(公告)日：2002-05-09
申请号：JP2000320442
申请日：2000-10-20
申请人： NIKKI CONSTRUCTION CO LTD , NON DESTRUCTIVE INSPECTION CO
发明人： IGARASHI MIKIO , YAMAUCHI SHINYA , YAMAGUCHI NORIO
IPC分类号： G01N23/04 , G03B42/02 , G03C11/02 , G21C17/003
摘要： PROBLEM TO BE SOLVED: To provide a method of producing a film mark which is easy for maintaining and fixing. SOLUTION: Characters or the like 2a comprising a character or a mark are marked on a shielding sheet 12 by at least a partial removal of a radiation shielding material-containing layer 12a to a flexible shielding sheet 12 having at least the radiation shielding material-containing layer 12a. Laser beams, water jet or a cutting die can be used as a marking means for the characters or the like 2a and the radiation shielding material-containing layer 12a is removed by these means. A lead sensitive paper having a lead layer 12a and a supporting sheet 12b can be used as the shielding sheet 12 and a plurality of these sheets may be stacked.

3. 发明专利

JP2002361425A INERT GAS ARC WELDING METHOD AND EQUIPMENT 失效
公开(公告)号：JP2002361425A
公开(公告)日：2002-12-18
申请号：JP2001173791
申请日：2001-06-08
申请人： NIKKI CONSTRUCTION CO LTD
发明人： TAKESHITA HITOSHI , YAMAUCHI SHINYA
IPC分类号： B23K9/16 , B23K9/028 , B23K9/167 , B23K9/23
摘要： PROBLEM TO BE SOLVED: To provide a TIG(tungsten inert gas) welding method and equipment, a type of inert gas arc welding method and equipment which enable reduction of man-hour for welding through effective cooling that is important particularly in the welding of a zirconium material, enable enhancement of economical efficiency through reduction in the use of an inert gas such as Ar gas, and realize a weld zone of stable quality. SOLUTION: In the TIG welding, an arc is generated between a tungsten electrode 16 and the tip grooves a, b of zirconium-used steel tubes W1 , W2 in an Ar gas atmosphere to carry out welding with the heat of the arc. A gas cooling device 30 is arranged midway in a gas feeding pipe 18 between an Ar gas cylinder 17 and a workpiece holder 20 and cools the Ar gas to a temperature of -50 to -60 deg.C. The cooled Ar gas G2 , G3 is sent to the workpiece holder 20 and supplied from the outside of a steel tube butt-weld zone as an after shielding gas G2 ; it is also sent into the steel tube and supplied from the inside of the butt-weld zone as a back shielding gas G3 . As a result, the cooling speed of the weld zone is increased, thus, reducing the welding performance time.

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