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1. 发明专利

JP2000015450A ROTATIONAL ARC WELDING TORCH 失效
公开(公告)号：JP2000015450A
公开(公告)日：2000-01-18
申请号：JP18711098
申请日：1998-07-02
申请人： NIPPON KOKAN KK , JAPAN TECHNO MEITO KK
发明人： KOBAYASHI MASAO , SUGITANI YUJI , IKEDA YOSHIHISA
IPC分类号： B23K9/30 , B23K9/022 , B23K9/29
摘要： PROBLEM TO BE SOLVED: To obtain a miniaturized and lightened torch whose electrode is shortened and to which a cable and a hose or the like are easily attached by providing a spherical bearing which supports a base end part of the electrode so as to freely execute a circular motion with a circular motion transmitting means and rotating an arc with a precession generating in the electrode. SOLUTION: The rotation of a rotating motor 6 is transmitted to an eccentric shaft 5, and a circular motion of an eccentric quantity (a) is transmitted to a connecting plate 3 via an automatic aligning bearing 4a. Precession is executed with the connecting plate 3 integrally with an electrode 1 using a spherical bearing 2 as a base point. Consequently, since a prescribed circular motion is executed with the tip end of the electrode 1, an arc generating from a welding wire 9 extending from the tip end of the electrode 1 is rotated at a high speed. In such a case, a rotational locus of the arc is completely round, and a shielding gas is fed from a small hole 1a. Since hoses or the like of a cooling water hose 10, a welding wire shielding gas feed hose 11 and a power cable 12 which are attached to the base end part of the electrode 1 are disposed in the outside of a box 100, a torch is miniaturized and lightened.

2. 发明专利

JP2870190B2 失效
公开(公告)号：JP2870190B2
公开(公告)日：1999-03-10
申请号：JP33037590
申请日：1990-11-30
申请人： NIPPON KOKAN KK
发明人： SUGITANI JUJI , FUJIOKA TADASHI , KOBAYASHI MASAO
IPC分类号： B23K37/053 , B23K37/06

3. 发明专利

JP2580901B2 失效
公开(公告)号：JP2580901B2
公开(公告)日：1997-02-12
申请号：JP23493791
申请日：1991-09-13
申请人： NIPPON KOKAN KK
发明人： KOBAYASHI MASAO , SUGITANI JUJI
IPC分类号： B23K9/30

4. 发明专利

JPH08168879A ONE SIDE BUTT WELDING METHOD FOR FIXED TUBE 失效
公开(公告)号：JPH08168879A
公开(公告)日：1996-07-02
申请号：JP31514094
申请日：1994-12-19
申请人： NIPPON KOKAN KK
发明人： SUGITANI YUJI , MURAYAMA MASATOMO , KOBAYASHI MASAO
IPC分类号： B23K33/00 , B23K9/028 , B23K37/06
摘要： PURPOSE: To efficiently form satisfactory back bead for the starting part of welding and to join welding bead, without using complicated sequence for example, by using ceramics for a backing material and making a groove bottom part thin. CONSTITUTION: A ceramics backing material 6 is arranged in the proximity to the 0 o'clock position which is the starting position for welding of the cross section of fixed tubes 1, 2 arranged so as to butt against each other; and in other parts, a plurality of copper backing strips 7 are arranged. Additionally, a thin groove bottom part 8 is formed at nearly the same position as the ceramics backing material 6. Welding is performed with one welding torch such that clockwise downward welding is first performed from the thin groove bottom part 8 of the 0 o'clock position to the 6 o'clock position and that counter-clockwise downward welding is then performed from the remainder of the thin groove bottom part 8 to the 6 o'clock position. As a result, the formation of the back bead for the groove part 5 of welding and the joining the welding bead are satisfactorily performed, so that a good quality welding bead is obtained.

5. 发明专利

JPH08108274A NARROW GAP BUTT WELDING METHOD OF FIXED TUBE 失效
公开(公告)号：JPH08108274A
公开(公告)日：1996-04-30
申请号：JP24424994
申请日：1994-10-07
申请人： NIPPON KOKAN KK
发明人： SUGITANI YUJI , MURAYAMA MASATOMO , KOBAYASHI MASAO
IPC分类号： B23K9/173 , B23K9/022 , B23K9/028 , B23K9/035 , B23K9/095 , B23K9/12 , B23K9/127
摘要： PURPOSE: To prevent generation of incomplete fusion by executing high speed rotating arc welding in first layer welding, build-up layer welding and final layer welding by specifying the rotating speed and rotating diameter of arc. CONSTITUTION: Fixed tubes 1, 2 are subjected to narrow gap butt welding by gas metal arc welding. In first layer welding, a copper backing CB is abutted to the rear face of narrow gap 3. The high speed rotating arc welding of 20-100Hz arc rotating speed and 1-4mm arc rotating diameter is used. Peripheral downward welding in the range of 100-300A welding current and 15-80cm/min is executed. In build-up layer welding, the arc welding diameter D is changed to 2-6mm, welding is executed in the range of 150-400A welding current and 20-120mm/min welding speed. In final layer welding, the arc rotating speed is changed to 1-10Hz and the arc rotating diameter to 1-3mm, welding is executed in the range of 200-300A welding current and 30-120cm/min welding speed.

6. 发明专利

JPH08108270A NARROW GAP BUTT WELDING METHOD OF FIXED TUBE 失效
公开(公告)号：JPH08108270A
公开(公告)日：1996-04-30
申请号：JP24424594
申请日：1994-10-07
申请人： NIPPON KOKAN KK
发明人： SUGITANI YUJI , MURAYAMA MASATOMO , KOBAYASHI MASAO
IPC分类号： B23K9/173 , B23K9/028 , B23K9/035 , B23K9/095 , B23K9/12 , B23K9/127
摘要： PURPOSE: To prevent generation of welding defect by executing welding of a fixed tube for a first layer, build-up layer, final layer with use of root gap, welding condition values in which data base is established beforehand. CONSTITUTION: A narrow gap 3 is formed at the end part of fixed tubes 1, 2, the root part of gap 3a is made to V shape having θ of 90-150 deg.. A copper backing metal is abutted on the rear face of gap, first layer welding is done with use of the high rotary arc welding method of 20-100Hz arc rotating speed and 1-4mm arc rotating diameter. Welding torch height control and narrow gap copying control are executed by an arc sensor while sensing the arc electric current and voltage waveform. Peripheral downward welding is executed while welding condition is selected from the optimum welding condition database. Build-up welding is executed while welding condition is select from the optimum welding condition database. By weaving welding torch in final layer welding, peripheral downward welding is executed while welding condition is selected from the optimum welding condition database. By this method, the welding having reduced deposited metal quantity is executed in high efficiency.

7. 发明专利

JPH0866770A FIRST PASS WELDING METHOD IN ONE SIDE BUTT WELDING OF FIXED TUBE 失效
公开(公告)号：JPH0866770A
公开(公告)日：1996-03-12
申请号：JP20509694
申请日：1994-08-30
申请人： NIPPON KOKAN KK
发明人： SUGITANI YUJI , MURAYAMA MASATOMO , KOBAYASHI MASAO
IPC分类号： B23K9/173 , B23K9/028 , B23K9/095 , B23K9/127 , B23K37/06
摘要： PURPOSE: To improve quality of weld zone for change in welding position and root gap by executing welding of root pass with using high speed rotating arc welding and automatically adjusting application of welding condition based on respective welding position and root gap. CONSTITUTION: The metal gas arc welding method, in which a groove is constituted of narrow gap joint 3, a ceramic backing strip 5 is abutted for backing material and which is executed in carbonic acid gas atmosphere with a high speed rotating arc, is used. Changes in welding position of a welding torch and root metal gap ΔG are detected in real time during welding. By selecting the optimum welding condition set based on the detected value of welding position and detected value of root gap, circumferential welding is executed. By this method, good quality of weld zone is obtained, because the first pass is welded by using a ceramic material for backing material, high electric current can be used for welding current, forming of penetration bead at arc start part is made easy, thus, high efficiency welding is made possible.

8. 发明专利

JPH0866769A FIRST PASS WELDING METHOD IN ONE SIDE BUTT WELDING OF FIXED TUBE 失效
公开(公告)号：JPH0866769A
公开(公告)日：1996-03-12
申请号：JP20509594
申请日：1994-08-30
申请人： NIPPON KOKAN KK
发明人： SUGITANI YUJI , MURAYAMA MASATOMO , KOBAYASHI MASAO
IPC分类号： B23K9/173 , B23K9/028 , B23K9/095 , B23K9/127 , B23K37/06
摘要： PURPOSE: To improve quality of weld zone for change in welding position and root gap by executing welding of root pass with using high speed rotating arc welding and automatically adjusting application of welding condition based on respective welding position and root gap. CONSTITUTION: The metal gas arc welding method, in which a groove is constituted of narrow gap joint 3, a copper backing strip 5 is abutted for backing material and a high speed rotating arc is used. Changes in welding position of a welding torch and root metal gap ΔG are detected in real time during welding. By selecting the welding condition based on the detected value of welding position and detected value of root gap, a first pass in one side butt welding is welded circumferentially downward. By this method, good quality of weld zone is obtained, further, because the first pass is welded by using a copper backing strip, the backing strip is of low cost and easy for control, further high speed rotating arc welding is used, thus, high efficiency welding is made possible.

9. 发明专利

JPH06126527A PLATE CUTTING DEVICE 失效
公开(公告)号：JPH06126527A
公开(公告)日：1994-05-10
申请号：JP28190892
申请日：1992-10-20
申请人： NIPPON KOKAN KK
发明人： SAITO SHOJI , HASEGAWA TOSHIYUKI , SAKOTA KATSUTOSHI , KOBAYASHI MASAO
IPC分类号： B23D55/04
摘要： PURPOSE:To provide a plate cutting device capable of efficiently cutting the perimeter of a plate over the full length, and of sufficiently ensuring the safety of operators. CONSTITUTION:A first cutting mechanism 1 for performing finishing work of the width of a plate B and a second cutting mechanism 2 for performing finishing work of the length of the plate B are arranged so that an extension line of the cutting plane of a sawing machine 5 for width-finishing in the first cutting mechanism 1 and an extension line of the cutting plane of a sawing machine 6 for length-finishing in the second cutting mechanism 2 cross at right angles. A first conveying means 19 conveys the plate B in the width direction (a) of the plate between the first cutting mechanism 1 and a conveying- intermediate position 3, and a second conveying means 20 conveys the plate B in the longitudinal direction (b) of the plate between the second cutting mechanism 2 and the conveying-intermediate position 3.

10. 发明专利

JPH05104130A METAL MATERIAL FOR LINE DRAWING WITH TONG HOLD MADE OF DIFFERENT METAL AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH05104130A
公开(公告)日：1993-04-27
申请号：JP26062991
申请日：1991-10-08
申请人： NIPPON KOKAN KK
发明人： KOBAYASHI MASAO , SUGITANI YUJI
IPC分类号： B21C1/00 , B21C5/00 , B23K9/02 , B23K9/028
摘要： PURPOSE:To manufacture a metal material for line drawing with a tong hold made of a different metal in which a backing strip is not required, centering is easily performed and welding is automated. CONSTITUTION:A tong hold forming member is constituted of a hollow axis 30; first, this tong hold forming member and the axial center of a buttering welding zone 2 are welded by plug weld; then, the metal material 1 for line drawing, to which the tong hold forming member is integrated by plug weld, is freely rotatably and horizontally arranged; while rotating the material 1, the area between the opposing faces of the tong hold forming member and the buttering welding zone is welded all around; the backing strip is unnecessitated; centering is made easy; and welding is automated.

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