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1. 发明专利

JPS5927784A Tig penetration welding method in all attitude by electrode having specially shaped forward end 失效
标题翻译： TIG渗透焊接方法在具有特殊形状前端的电极的所有姿态
公开(公告)号：JPS5927784A
公开(公告)日：1984-02-14
申请号：JP13624082
申请日：1982-08-06
申请人： Nippon Steel Corp
发明人： SHIYOUJI SHIGETO , ISHIDA YOUICHI
IPC分类号： B23K9/16 , B23K9/00 , B23K9/028 , B23K9/035 , B23K9/167 , B23K35/02
CPC分类号： B23K9/0026
摘要： PURPOSE:To obtain easily penetration beads of a projecting shape with better arc concentratability and less surface tension, by adapting an electrode having the forward end part worked to a cylindrical shape to all attitude TIG welding of butt parts. CONSTITUTION:Penetration beads of a projecting shape are formed by using an electrode which is columnar on the side face in the forward end part of the electrode near the arc generating part, is circular in the sectional shape at the forward end in the columnar part and is roughly plane on the forward end face in the case of subjecting the single V or U groove butt parts of steel pipes to penetration welding with an automatic TIG welder in all attitudes. Since the concentratability of the arc is good in the above-mentioned method, only the required part on the groove faces melts and the good penetration beads of a projecting shape are stably obtained in the state of forming molten metal.
摘要翻译：目的：通过使具有前端部分的电极加工成圆柱形的电极，可以获得更好的电弧聚集性和较小的表面张力的突出形状的容易穿透的珠子，使其对接部分的所有姿态TIG焊接。构成：通过使用在电弧产生部附近的电极的前端部的侧面上具有圆柱状的电极形成突出形状的穿透珠，在柱状部的前端呈截面形状为圆形，在使用自动TIG焊机的钢管的单个V形槽或U槽对接部分以一切态度进行焊接的情况下，在前端面上大致平面。由于在上述方法中电弧的集中性是良好的，因此在形成熔融金属的状态下，只有槽面上的必需部分熔化，并且稳定地获得突出形状的良好的渗透珠。

2. 发明专利

JPS57195596A NON-CONSUMABLE ARC WELDING METHOD FOR STATIONARY PIPE 失效
公开(公告)号：JPS57195596A
公开(公告)日：1982-12-01
申请号：JP7938381
申请日：1981-05-27
申请人： NIPPON STEEL CORP
发明人： NOGAMI MITSUO , KIKUNO SHIROU , ISHIDA YOUICHI
IPC分类号： B23K9/16 , B23K9/167 , B23K31/02
摘要： PURPOSE:To facilitate welding procedure in preparing stationary pipes to a single Vee or single U groove and butt-welding these by injecting an inert gas and cooling a molten pool forcibly, thereby obtaining the penetrated section of an inverted Vee shape. CONSTITUTION:In preparing stationary pipes to a single Vee or single U groove and butt-welding these, an arc is generated between a tungsten electrode 6 and base materials 1. A filler metal 7 is supplied and an inert gas is injected through a flat nozzle 9 at an angle alpha from the rear of the welding advance direction. A cooled and solidifed layer 3 is formed on the surface of a molten pool 2 by this gas, whereby the penetrated sectional shape of an inverted Vee shape is obtained. Melt-down is prevented by this and welding procedure is made easy.

3. 发明专利

JPS55141376A ARC STARTING METHOD IN AUTOMATIC TIG WELDING OF STATIONARY PIPE 失效
公开(公告)号：JPS55141376A
公开(公告)日：1980-11-05
申请号：JP4967879
申请日：1979-04-24
申请人： NIPPON STEEL CORP
发明人： ISHIDA YOUICHI , TANINAKA KOUJI
IPC分类号： B23K9/16 , B23K9/06 , B23K9/067 , B23K9/167
摘要： PURPOSE:To form the stable weld zone free from burn-through by inserting the specific small metal piece in the arbitrary position in the root of the groove of butted stationary pipes, melting the same and applying arc welding with the molten pool thus formed as a start point. CONSTITUTION:In automatic TIG welding of the butt portions of stationary pipes 2a, 2b, a small metal piece 1 of a prismoid shape composed of the material equivalent to that of the stationary pipes is inserted in the arbitrary position in the root of the groove and an arc is generated from an electrode 5 while shielding gas is being spouted from a welding nozzle 3, whereby the small piece 1 is melted. A filler wire 4 is continuously fed onto the molten pool thus formed and the arc welding is subsequently applied while the nozzle 3 is being moved along the circumference of the groove. With this method, the initial penetration beads are formed with less incident heat while the specified gap of the groove is being maintained by the small piece 1 and the turbulence of the shielding gas is prevented, and therefore the stable welding may be accomplished.

4. 发明专利

JPS58163581A TIG PENETRATION WELDING METHOD IN ALL POSITIONS 失效
公开(公告)号：JPS58163581A
公开(公告)日：1983-09-28
申请号：JP4558382
申请日：1982-03-24
申请人： NIPPON STEEL CORP
发明人： SATOU MAKOTO , NAMATAME YUTAKA , SHIYOUJI SHIGEJI , ISHIDA YOUICHI
IPC分类号： B23K9/16 , B23K9/167 , B23K9/23 , B23K35/30
摘要： PURPOSE:To enable penetration wleding of steel pipes of thick-walled materials easily in all butt positions, by using a high S filler wire contg. S in a specific range in automatic TIG welding. CONSTITUTION:Steel pipes of >=3mm. wall thickness are automatically TIG- welded in all butt positions by using a filler wire regulated to 0.015-0.030% S, and the content of S in weld metal is controlled to 0.012-0.025%, whereby the permissible range of the current value at which a penetration bead of a projecting shape is formed, and the selection of welding conditions is made extremely easy. The use of the high S wire results in the decreased temp. at which the solidification of molten steel is completed, the difficulty in the flow of the molten steel in a molten pool on account of an increased viscosity of the molten steel prior to solidifying, and the possibility of formation of the penetration bead having a projecting shape in a wide current range. If the content of S is

5. 发明专利

JPS5653895A WELDING CONDITION SWITCHING METHOD IN PIPE CIRCUMFERENCE AUTOMATIC WELDING 失效
公开(公告)号：JPS5653895A
公开(公告)日：1981-05-13
申请号：JP12996779
申请日：1979-10-11
申请人： NIPPON STEEL CORP
发明人： ISHIDA YOUICHI , TANINAKA KOUJI
IPC分类号： B23K9/028 , B23K9/095
摘要： PURPOSE:To simplify position adjustment for welding start to set condition switching positions arbitrarily, by providing a groove throughout the circumference of the guide device and by providing a condition switching commander so that it can be removed freely. CONSTITUTION:Commanddr 4 is mounted on groove 3 of guide rail 2 previously, and guide rail 2 is so fitted that the position of this commander 4 and the welding start position may have a prescribed relation. After that, a welding head is fitted to guide rail 2, and commander 4 is so adjusted finely that commander 4 and contact 17 in the welding head side may be brought into contact with each other in the position where welding torch 16 agrees with clamp weld zone 15. Therefoe, the welding start point is set to a prescribed position accurately. Even in the course of welding, the welding head detects commander 4 to switch welding conditions by setting commander 4 to a predetermined position, thus welding always the pipe circumference under optimum conditions.

6. 发明专利

JPS5645281A AUTOMATIC BUTT WELDING METHOD FOR OBLIQUEECUT PIPE 失效
公开(公告)号：JPS5645281A
公开(公告)日：1981-04-24
申请号：JP11785979
申请日：1979-09-17
申请人： NIPPON STEEL CORP
发明人： INAMI RIYUUICHI , ISHIDA YOUICHI
IPC分类号： B23K9/028
摘要： PURPOSE:To realize an automatic butt welding with a combination of a simple system and device, by moving the bevel working device and then the automatic welding machine along the circular track substance attached outside each pipe to be welded and in parallel to the face of the pipe end. CONSTITUTION:The circular track substance 1 is attached detachably outside the oblique-cut and right-angle cut pipes 7 and 9 by the fixing tool 6 and in parallel to the plane including each pipe end face. Then the bevel working device 2 possessing the gas torch 8 is mounted to the substance 1. And then the device 2 is moved along substance 1 to give an bevel working of an angle alpha to each pipe end. Then an automatic welding machine incorporating the welding torch, the welding wire feeding device and others is mounted to the substance 1 which is attached to one pipe to be welded in parallel to the face including the welding line. The welding machine is then moved along the substance 1 to secure a mutual butting between both pipe ends for an automatic welding.

7. 发明专利

JPS55136572A AUTOMATIC TIG WELDING METHOD OF STATIONARY PIPE 失效
公开(公告)号：JPS55136572A
公开(公告)日：1980-10-24
申请号：JP4245479
申请日：1979-04-10
申请人： MITSUBISHI ELECTRIC CORP , NIPPON STEEL CORP
发明人： UKAI JIYUN , NOGAMI MITSUO , ISHIDA YOUICHI , TANINAKA KOUJI , KIKUNO SHIROU , HIRAMATSU MASAKI
IPC分类号： B23K9/028 , B23K9/12
摘要： PURPOSE:To make operation efficient and assure the even penetration beads without any backing copper strips in the root-pass welding by performing welding with plural welding heads dividedly along the circumferential weld line. CONSTITUTION:The 1st head 3 is started from the 12 o'clock position to the counterclockwise direction and the 2nd head 4 is started from a suitable position between 3 o'clock and 6 o'clock to the clockwise direction. The shrinkage of the gap owing to weld heat shrinkage at the point when the 2nd head 4 ends welding up to the 6 o'clock position is slight. The 2nd head 4 is returned to the 12 o'clock position upon ending of the welding up to the 6 o'clock position, after which it performs welding in the clockwise direction. On the other hand, the 1st head 3 performs welding continuously but the thermal shrinkage at the C point is small by being restrained by the weld zone (4-1) having previously been welded by the 2nd head 4, where the penetration is perfect and there is no likelihood for weld defects. Similarly, even in the welding from the 12 o'clock position by the 2nd head 4, the reduction of the gap at the D point is small by the restraint of the weld zone (4-1), thus the root-pass welding of even penetration is achieved.

8. 发明专利

JPS58212877A All position non-gap tig welding of fixed tube 失效
标题翻译：所有位置固定管的无缝焊接
公开(公告)号：JPS58212877A
公开(公告)日：1983-12-10
申请号：JP9308682
申请日：1982-06-02
申请人： Nippon Steel Corp
发明人： SATOU MAKOTO , KIKUNO SHIROU , SHIYOUJI SHIGETO , ISHIDA YOUICHI , IMAMURA TATSUMI
IPC分类号： B23K9/16 , B23K9/028 , B23K9/167 , B23K37/00
CPC分类号： B23K37/003
摘要： PURPOSE:To enable all position non-gap TIG automatic welding of fixed tube, by providing two gas pressure controlling nozzles at right angles to the direction of advance of welding and one in the rear around the electrode, feeding the wire from the front, and thereby cooling the arc and the surface of motlen pool and performing root pass penetration welding. CONSTITUTION:An arc is deflected to the front by gas jetted from the rear to the direction of advance of welding. At the same time, the surface of molten metal right under the arc is cooled forcibly to form a solidified layer positively. The arc is narrowed down thinly in vertical direction by jetting gas from nozzles 7-2, 7-3 for gas pressure controlling and concentrative force of the arc is heightened and arc force is strengthened to enable penetration welding. At the same time, molten metal on the side of groove is checked by jetting gas shown by the arrow 7' to form a solidified layer positively. Thus, root pass penetration welding is performed stably at all times and at all positions.
摘要翻译：目的：为了实现固定管的所有位置无间隙TIG自动焊接，通过提供两个气体压力控制喷嘴与焊接前进方向成直角，一个在电极的后部，从前面供电，以及从而冷却电弧和絮凝池的表面，并执行根管穿透焊接。构成：通过从后方向焊接前进方向喷射的气体，电弧向前方偏转。同时，将正下方的熔融金属表面强制冷却以形成固化层。通过从气体压力控制喷嘴7-2,7-3喷射气体，使电弧在垂直方向上变薄，并且电弧的集中力被提高并且电弧力被加强以实现穿透焊接。同时，通过喷射箭头7'所示的气体来检查槽侧的熔融金属，以形成固化层。因此，贯穿贯通焊接始终在所有位置稳定地进行。

9. 发明专利

JPS5653894A CONTINUOUS WELDING METHOD FOR CIRCUMFERENCE OF FIXED PIPE 失效
公开(公告)号：JPS5653894A
公开(公告)日：1981-05-13
申请号：JP12996679
申请日：1979-10-11
申请人： NIPPON STEEL CORP
发明人： ISHIDA YOUICHI , TANINAKA KOUJI , TANAKA ISAO
IPC分类号： B23K9/028
摘要： PURPOSE:To improve efficiency and reduce generation of welding defects considerbly, by performing welding continuously from the arc start time up to the last layer. CONSTITUTION:After steel pipes are butted to each other and are fixed by the clamp device, the formed circumference weld line is welded continuously without interrupt of arc by the TIG automatic welding machine. That is, steel pipe 1 is subjected to clamp welding in plural positions 8, 9 and 10 by TIG manual welding before welding, and TIG automatic welding is started from clamp position 8. Plural commanders (a, b, c and d) are provided previously on the welding torch movement locus along the circumference weld line, and these commanders are detected by the welding torch, thereby switching and controlling automatically welding conditions. The clamp weld position is subjected to grinder processing in the welding start position of the first layer, and it is melted again by TIG automatic welding to perform welding the first layer.

10. 发明专利

JPS55141375A ARC STARTING METHOD IN AUTOMATIC TIG WELDING OF STATIONARY PIPE 失效
公开(公告)号：JPS55141375A
公开(公告)日：1980-11-05
申请号：JP4967779
申请日：1979-04-24
申请人： NIPPON STEEL CORP
发明人： ISHIDA YOUICHI , TANINAKA KOUJI
IPC分类号： B23K9/16 , B23K9/035 , B23K9/06 , B23K9/067 , B23K9/167
摘要： PURPOSE:To form the stable weld zone free from burn-through by contacting the backing strip of the specific shape to the arbitrary position on the back side of the groove of butted stationary pipes and applying arc welding with the position of the vertex of said contact surface as a start point. CONSTITUTION:In automatic TIG welding of the butt portions of stationary pipes 1a, 1b, a short-length backing strip 2 having the radius of curvature smaller than the inside diameter of the pipes is contacted to the arbitrary position on the back side of the groove and the TIG welding is started by generating an arc from an electrode 4 while spouting shielding gas from a welding torch 2 to the groove part 2a in the vertex position of said contact surface. Since the radius of curvature of the backing strip is smaller than the inside diameter of the pipe, the contact becomes linear and the spacing between the inside surface of the pipes and the groove bottom of the backing strip is maintained constant, and this makes possible the stable arc starting. In addition, the sheilding gas flows along the curved surface of the backing strip and therefore there is no likelihood for causing turbulence and the weld beads free from defects are formed.

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