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1. 发明专利

JPH09225685A BACKING MATERIAL FOR ENCLOSED WELDING 失效
公开(公告)号：JPH09225685A
公开(公告)日：1997-09-02
申请号：JP3249496
申请日：1996-02-20
申请人： KOBE STEEL LTD
发明人： NAKANO YOSHIAKI
IPC分类号： E04G21/12 , B23K9/038 , B23K37/06
摘要： PROBLEM TO BE SOLVED: To provide a backing material for enclosed welding capable of applying to an optional diameter of welding base material, manufacturing at a low cost and obtaining back bead having excellent appearance. SOLUTION: The backing material 1 for welding is constructed by connecting plural bar shaped ceramic members 2 with wires 3 being a connecting material. Both end surfaces 2a in the side direction of respective ceramic members 2 are formed into a circular arc shape, and respective ceramic members 2 are arranged in a row so that end surfaces 2a of adjacent ceramic members 2 come into contact with each other. After wires 3 are forced to enter perpendicularly to the longitudinal direction, in two places somewhat near the center from both ends in the longitudinal direction of ceramic members 2, respective ceramic members 2 are connected in a bamboo blind-like by sintering.

2. 发明专利

JPH08309542A FUME SUCTION/REMOVAL METHOD AT FILLET WELDING 失效
公开(公告)号：JPH08309542A
公开(公告)日：1996-11-26
申请号：JP11493395
申请日：1995-05-12
申请人： KOBE STEEL LTD
发明人： NAKANO YOSHIAKI , KAWAMATA YOSHIKAZU
IPC分类号： B23K9/29 , B23K9/02 , B23K9/32
摘要： PURPOSE: To provide a fume suction/removal method in fillet automatic welding capable of sucking/removing fume in high efficiency when an automatic fillet welding equipment is traveled/worked in a wide range and long distance. CONSTITUTION: In an automatic fillet welding to weld the fillet part formed by a horizontal plate 1 and vertical plate 2 intersecting with exceeding an angle of 0 deg. to the horizontal plate, for sucking/removing fume, by using a hood 20, which has Al face/A2 face 21 mutually separating in the weld line direction/ orthogonally intersecting with weld line and B face 22 intersecting to these A1 face/A2 face (for example, the face parallel to the horizontal plate 2), while a welding torch 16 equipped with a weld fume suction port 19 is inserted in the hood, fillet welding is executed. By this method, as fume is prevented from dispersion, fume is recovered in high efficiency.

3. 发明专利

JPH07266052A DEVICE FOR COLLECTING WELDING FUME 失效
公开(公告)号：JPH07266052A
公开(公告)日：1995-10-17
申请号：JP5895694
申请日：1994-03-29
申请人： KOBE STEEL LTD
发明人： NAKANO YOSHIAKI , KAWAMATA YOSHIKAZU
IPC分类号： B08B15/04 , B01D46/00 , B23K9/32
摘要： PURPOSE:To provide a device for collecting welding fume, which is a small type, is excellent in portability, can correspond to the wide change of a work distance between a place where welding is performed and a device for collecting welding fume, further can always and properly maintain a gas suction amount. CONSTITUTION:A main sucking device 1 is equipped with prefilter 3 composed by a fireproof material, main filter 2 for collecting welding fume, and main sucking blower 4. Also, an auxiliary sucking device 10 is equipped with fireproof prefilter 3a and auxiliary sucking blower 4a. Spaces between a welding torch 30 and the auxiliary sucking device 10, among respective auxiliary sucking devices 10, and between the auxiliary sucking device 10 and the main sucking device 1, are connected by connecting hoses 8. Gas containing welding fume, which is sucked through the sucking nozzle 12 of the welding torch 30, is sent to the main sucking device 1 through the auxiliary sucking device 10.

4. 发明专利

JPH05329651A WELD FUME COLLECTING DEVICE 失效
公开(公告)号：JPH05329651A
公开(公告)日：1993-12-14
申请号：JP16005292
申请日：1992-05-28
申请人： KOBE STEEL LTD , NIPPON SEIMITSU KK
发明人： NAKANO YOSHIAKI , SATO MASAHARU , IMAOKA SUSUMU , SAEKI MASARU
IPC分类号： B01D46/24 , B08B5/04 , B23K9/32
摘要： PURPOSE:To provide the weld fume collecting device using shielding gas which is used easily and can be miniaturized. CONSTITUTION:A suction hood 6 to collect fumes to be scattered at a welding place is fitted to a torch 5 and the fumes are collected by the fume collecting device 3 via a suction hose 7 connected to the suction hood 6. The fume collecting device 3 is then provide with a suction part and an ejection part, the suction part has a first chamber 15 and a second chamber 20 divided by a partition wall 21 having a communication hole 22, a filler 17 is arranged freely exchangeably to the first chamber 15 so as to form space to cover the communication hole 22, the suction hose 7 is connected to the opposite side space to the communication hole 22 for the filter 17, the second chamber 20 is formed as suction space sucked by a blower 24 and the ejection part is provided with a tank 27 filled up with the shielding gas. In addition, a nozzle 30 to eject the shielding gas in the tank 27 toward the inside of the communication hole 22 pulsatively at a specified period of time is provided on the second chamber 20.

5. 发明专利

JPH05138357A WELD FUME SUCTION TORCH 失效
公开(公告)号：JPH05138357A
公开(公告)日：1993-06-01
申请号：JP33442391
申请日：1991-11-22
申请人： KOBE STEEL LTD
发明人： NISHIKAWA YUTAKA , NAKANO YOSHIAKI , SATO MASAHARU , IMAOKA SUSUMU
IPC分类号： B23K9/29
摘要： PURPOSE:To provide the weld fume suction torch capable of using a light hose having satisfactory flexibility as a cable hose and improving workability of welding work. CONSTITUTION:A shielding gas discharge nozzle 1 to discharge shielding gas and a suction nozzle arranged coaxially on this shielding gas discharge nozzle 1 are provided on the torch tip. A suction hole part of this motion nozzle is formed of a porous ceramics member having large holes through which weld fumes can pass but spatters cannot pass and this action hole part is formed into a spatter removing member 2. Accordingly, the spatters at the high temperature can be prevented from entering the cable hose.

6. 发明专利

JPH03258491A ENCLOSED ARC WELDING METHOD 失效
公开(公告)号：JPH03258491A
公开(公告)日：1991-11-18
申请号：JP5471490
申请日：1990-03-06
申请人： KOBE STEEL LTD
发明人： NAKANO YOSHIAKI , NISHIMURA KATSUSHI , KONNO KIYOSHI
IPC分类号： B23K9/038 , B23K35/368
摘要： PURPOSE:To prevent the inclusion of slag and to avert the generation of the lack of fusion in a joint part by combining a self-shielded arc welding method with an enclosed welding method and specifying the compsn. and flux rate of the flux of a flux cored wire. CONSTITUTION:A pair of materials 11, 12 which are to be welded, are made into a bar shape, and have the joint surfaces substantially perpendicular to the axial direction thereof are disposed by providing a prescribed groove space 15 between the joint surfaces and a backing strip 14 consisting of refractories having >=1100 deg.C softening point is disposed to enclose a part of the groove space 15. These materials are then subjected to the enclosed arc welding between the joint surfaces by using the flux cored wire 18 for self-shielded arc welding. The wire 18 is formed by filling the flux, which contains, by weight, 20 to 30% metal fluoride, 2 to 10% metal carbonate, 8 to 15% Al, 5 to 10% Mg, 0.5 to 8% Mn, and 35 to 60% iron component and is adjusted in the ratio of the metal fluoride/iron component to 0. 4 to 0.7, into a steel sheath at 17 to 23wt.% flux rate.

7. 发明专利

JPH03258489A ENCLOSED ARC WELDING METHOD 失效
公开(公告)号：JPH03258489A
公开(公告)日：1991-11-18
申请号：JP5471390
申请日：1990-03-06
申请人： KOBE STEEL LTD
发明人： NAKANO YOSHIAKI , NISHIMURA KATSUSHI , KONNO KIYOSHI
IPC分类号： B23K37/06 , B23K9/038 , B23K35/362 , B23K35/368
摘要： PURPOSE:To easily generate arcs by using a backing strip having the softening point above a specific temp. and having an electrical conductivity at the time of disposing the backing strip enclosing the aperture in a groove face and inserting a welding wire from the aperture and forming the arcs, thereby executing welding. CONSTITUTION:The backing strip 13 is so disposed as to enclose the region of the groove space 15 of reinforcing bars 11, 12 as materials to be welded. The backing strip 13 disposed in the deep part of the groove space has the electrical conductivity and, therefore, the arcs are surely and easily generated if the welding wire is inserted into this groove space 15 and an arc voltage is impressed between the welding wire and the materials to be welded. This backing strip is formed of a material having the refractoriness of >=1100 deg.C softening point and, therefore, even if the backing strip comes into contact with the weld metal melted by the arc heat, the backing strip can hold this weld metal via the slag. The arcs are easily generated in this way and the smooth starting of the welding operation is assured.

8. 发明专利

JPH02251371A GAS SHIELDED ARC ENCLOSED WELDING METHOD 失效
公开(公告)号：JPH02251371A
公开(公告)日：1990-10-09
申请号：JP7127889
申请日：1989-03-23
申请人： KOBE STEEL LTD
发明人： NAKANO YOSHIAKI , WAKINAKA HIDETO
IPC分类号： B23K9/038
摘要： PURPOSE:To prevent the occurrence of weld defects by using backing material composed of a band-plate-shaped flexible member and an electrically conductive member superposed thereon, copper backing and a shielding cap to perform gas shielded arc enclosed welding. CONSTITUTION:The backing material 30 composed of the band-plate-shaped flexible member 31 and the electrically conductive member 32 superposed thereon is inserted into a groove 48 formed on the inside lower part of the center in the longitudinal direction of the copper backing 40. The shielding cap 49 connected with the tip of the copper backing 40 is tightened by a wing bolt 60 to fix the copper backing 40 and members 50 to be welded are arranged in its peripheral space. Shielding gas is discharged from shielding gas discharge openings 43 and 44 provided to the shielding cap to an opening 42 to perform gas shielded arc enclosed welding. By this method, the weld defects such as undercuts and overlaps and damage of the copper backing are prevented.

9. 发明专利

JPH01186275A ENCLOSED ARC WELDING EQUIPMENT 失效
公开(公告)号：JPH01186275A
公开(公告)日：1989-07-25
申请号：JP1226088
申请日：1988-01-22
申请人： KOBE STEEL LTD
发明人： TANAKA OSAMU , NAKANO YOSHIAKI , KONNO KIYOSHI , YAMADA TOMOAKI
IPC分类号： B23K37/06 , B23K9/02 , B23K9/038
摘要： PURPOSE:To increase efficiency of work by using a copper strap fitted to a couple of bar-shaped materials to be welded whose joining surface is vertical to the axial direction arranged by providing prescribed groove space to press and fix a strap material to form the groove space. CONSTITUTION:The couple of bar-shaped materials 11 and 12 to be welded whose joining surface is vertical to the axial direction are arranged upward and downward by providing a prescribed groove at joining surface space 15. The copper strap 14 is provided so as to cover a part of the joining surface of the upper and lower materials 11 and 12 to be welded. The strap material 13 having strength same as or below that of the materials 11 and 12 to be welded is arranged in contact with the materials to be welded and said strap material 13 is pressed and fixed thereon by a pressing jig 17 arranged to the copper strap 14. By this method, the working stage is simplified and the efficiency of work is increased and reliability of joint strength is improved.

10. 发明专利

JPS55141394A ALL POSITION WELDING METHOD OF STATIONARY PIPE 失效
公开(公告)号：JPS55141394A
公开(公告)日：1980-11-05
申请号：JP4776479
申请日：1979-04-17
申请人： KOBE STEEL LTD
发明人： IIO KATSUROU , NAKANO YOSHIAKI , OKADA MASASHI
IPC分类号： B23K9/035
摘要： PURPOSE:To weld the full circumference of joint of butt-joined stationary pipes excellently and at high efficiency in horizontal or inclined position, by welding a preceding lamination by a specified welding method and welding a succeeding lamination by said specified welding method partially and by using a backing strip for the remaining part. CONSTITUTION:A group consisting of hand welding, GMA welding and TIG welding is called the first group welding method, and another group consisting of EG (electrogas) welding, ES (electroslag) welding and other welding methods using backing strips to prevent the deposited metal from drooping off is called the second group welding method. When welding the full circumference of the joint of butt-jointed stationary pipes in horizontal or inclined position, the initial layer A part over the full circumference is welded to form a preceding lamination by a welding method selected from the first group welding method, and parts B, B' of a succeeding lamination are welded by a welding method selected from the second group welding method, and finally the parts C, C' are welded by a method selected from the first group welding method. Besides, by setting angle theta larger than about 30 degrees, insufficient penetration and slag inclusion may be prevented.

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