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11. 发明专利

JPS613683A HOLLOW ELECTRODE TYPE TIG ARC WELDING METHOD 失效
公开(公告)号：JPS613683A
公开(公告)日：1986-01-09
申请号：JP12470084
申请日：1984-06-18
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAMEI HIROMASA , IMADA TAKEHIKO , BETSUPU SEIJI
IPC分类号： B23K9/16 , B23K9/167
摘要： PURPOSE:To prevent the generation of a defect such as lack of fusion in a weld zone by feeding an inert gas to the inside of a hollow tungsten electrode and controlling the spread of an arc. CONSTITUTION:The inert gas 13 is supplied to the hollow part 12 of the cylindrical hollow electrode 11 and arc welding is executed while the gas is ejected from the arc generating end of the electrode 11. A supply pipe 4 is branched to two pipes 15, 16. The gas 13 is supplied impulsively by an intermittent pump 17 from the one pipe 15 and the gas 13 is supplied at a specified flow rate from the other supply pipe 16. The arc 3 is thus spread to the outside by the inert gas ejected to the central part of the TIG arc 3. The spread of the arc is freely controllable by changing the ejection rate of the inert gas.

12. 发明专利

JPS60231571A ROOT PASS METHOD 失效
公开(公告)号：JPS60231571A
公开(公告)日：1985-11-18
申请号：JP8598684
申请日：1984-04-27
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAMEI HIROMASA , IMADA TAKEHIKO , FUKUNAGA YOSHIAKI , NITSUTA TETSUO , SUGIMOTO YUUSAKU , OOSUMI TETSUYA
IPC分类号： B23K33/00 , B23K9/02 , B23K9/022 , B23K9/173
摘要： PURPOSE:To reduce welding time and to improve the quality of a weld zone by inserting a wire into a groove space and welding circularly the groove while changing over continuously and alternately a high-current spray arc and low- current short arc thereby executing satisfactory penetration welding. CONSTITUTION:The high-current spray arc 31 and the low-current short arc 32 are continuously and alternately changed over by using a current conducting chip 29 and a consumable electrode wire 30 while a wire 28 of a wire guide nozzle 27 is inserted into the space of the groove between members to be welded. Said arcs are moved circularly in the weld line direction to form penetration beads 33. The breakthrough of the arc 32 and molten metal on the front is thus prevented even if there is variance in the size of the space of the groove between the members to be welded. The formation of the molten metal to fill the space of the groove is made possible by the insertion of the wire 28 of the nozzle 27 into said space.

13. 发明专利

JPS5934476B2 JPS5934476B2 - 失效
公开(公告)号：JPS5934476B2
公开(公告)日：1984-08-22
申请号：JP15387879
申请日：1979-11-28
申请人： Mitsubishi Heavy Ind Ltd
发明人： SHIMOYAMA HIROSHI , IMADA TAKEHIKO , KAWAI KYOKAZU , YOSHIDA KAZUHIKO , NISHINA NAOYUKI , FUKAYA TOSHIO
IPC分类号： B23K9/00 , B23K9/013 , B23K9/028

14. 发明专利

JPS58110182A WELDING METHOD 失效
公开(公告)号：JPS58110182A
公开(公告)日：1983-06-30
申请号：JP20687781
申请日：1981-12-23
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAMEI HIROMASA , IMADA TAKEHIKO
IPC分类号： B23K9/16
摘要： PURPOSE:To eliminate the need for grinder work after welding by blowing a gas of the same components as those of a shielding gas to the areas near the boundaries between a molten pool and base materials during welding thereby widening the molten metal to the other side and improving the wettability of the molten metal and the base materials. CONSTITUTION:In TIG welding, GMA welding, plasma welding, etc., a forming gas 9 of the same components as those of a shielding gas 5 is blown from a blowing pipe 8 for forming gas mounted in the position aiming the right end or left end near the rear end of a molten pool 6 during welding. Molten metal 6 is widened and the wetting angle theta2 between the metal 6 and base materials 10 is decreased, whereby the boundaries between beads 7 and the materials 10 are made smooth and the need for grinding work is eliminated.

15. 发明专利

JPS5890374A VERTICAL NARROW GROOVE MIG WELDING METHOD 失效
公开(公告)号：JPS5890374A
公开(公告)日：1983-05-30
申请号：JP18774181
申请日：1981-11-25
申请人： MITSUBISHI HEAVY IND LTD
发明人： MATSUMOTO TAKERU , KAMEI HIROMASA , IMADA TAKEHIKO , FUKUNAGA YOSHIAKI , TAKANO GENTA , OGAWA YOSHIICHI
IPC分类号： B23K9/16 , B23K9/038 , B23K9/173
摘要： PURPOSE:To economize resources and to prevent the excessive increase in molten pools by supplying a shielding gas into a groove, oscillating a bended welding wire, and controlling the molten pool so as not to made into one pool by using low pulse currents. CONSTITUTION:A shielding gas is supplied through hollow grooves 4, 8 and a small hole 5 from a pipe for supplying of the shielding gas. On the other hand, a welding wire 9a is bended at a specified width and a specified pitch in the breadthwise direction of the groove by gears 11a, 11b for feeding and bending and forming. The curved wire is supplied through a nozzle 10 for feeding and conduction of electricity into the groove and is simultaneously oscillated in the thickness direction of materials 1, 2 together with the nozzle 10. Molten pools 13 are made shorter than the plate thickness by using a low pulse current method which changes the welding current in the thickness direction of the materials 1, 2 at every several seconds to conduct high current to both end parts of the plates and to conduct low current and high current alternately to the central part according to the plate thickness. Thus, the formation of one pool owing to an excessive increase in the molten pools is prevented and toughness is improved by the mutual refining effect of the weld layers.

16. 发明专利

JPS5677066A AUTOMATIC WELDING EQUIPMENT OF PIPE INSIDE SURFACE 失效
公开(公告)号：JPS5677066A
公开(公告)日：1981-06-25
申请号：JP15387879
申请日：1979-11-28
申请人： MITSUBISHI HEAVY IND LTD
发明人： SHIMOYAMA HIROSHI , IMADA TAKEHIKO , KAWAI KIYOKAZU , YOSHIDA KAZUHIKO , NISHINA NAOYUKI , FUKAYA TOSHIO
IPC分类号： B23K9/00 , B23K9/013 , B23K9/028
摘要： PURPOSE:To make preparatory work simple and easy and improve safety and workability by unitizing a gondola to unify a welding machine. CONSTITUTION:A gondola 3 is inserted into the pipes 1, 1' to be welded, thece a holding piece 10 on the gondola 3 side and a holding piece 11 on the pipe 1 side are connected by means of a wire 12 to suspend the gondola 3. A circumferential ring 9 and the pipes 1, 1' to be welded are set concentrical by means of a centering jig 14. The welding machine is put together with a travelling carriage 16 in the predetermined position and a welding torch 26 is set toward the weld line 2, thence a welding button in pushed. These works are made by the operator from on a central deck 7. If the welding start button is turned ON, the welding machine slews and moves together with the carriage 16 along the rack rail 15 and at the same time, a wire feeder 29 operates to supply a welding wire 28 to the torch 26, thus, the circumferential welding is automatically accomplished.

17. 发明专利

JPH03169497A AUSTENITIC STAINLESS STEEL WELDING MATERIAL HAVING EXCELLENT CREEP RUPTURE DUCTILITY AND BRITTLENESS RESISTANCE 失效
公开(公告)号：JPH03169497A
公开(公告)日：1991-07-23
申请号：JP30667289
申请日：1989-11-28
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： NAKAZAWA TAKANORI , FUJITA NOBUHIRO , YANO MITSURU , KOMATSU HAJIME , TASHIMO MASANORI , TAKANABE KIYOSHI , KAWAGUCHI SEIICHI , IMADA TAKEHIKO
IPC分类号： B23K35/30
摘要： PURPOSE:To provide a welding material for high temp. structure by constituting the welding material with the specific wt.% of C, Si, Mn, P, Cr, Ni, Mo, Al, N and the balance of Fe and making the specific vol.% of delta-ferrite quantity. CONSTITUTION:The welding material is constituted of

18. 发明专利

JPH0289577A METHOD FOR REPAIR WELDING OF DEFECTIVE PIPING 失效
公开(公告)号：JPH0289577A
公开(公告)日：1990-03-29
申请号：JP23889688
申请日：1988-09-26
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAWAI YUKIHIRO , IMADA TAKEHIKO , IKEDA TAKAO , FUKUNAGA YOSHIAKI
IPC分类号： B23K31/00 , B23K9/29
摘要： PURPOSE:To execute repair welding by generating an arc, while suppressing bleeding of an internal fluid by using a hollow electrode for a W electrode held by a TIG welding torch, feeding a welding wire from an inner cavity of the hollow electrode, and simultaneously allowing shielding gas to flow. CONSTITUTION:At the time of repairing a piping in which a fluid is contained, a hollow W electrode 9 and a welding wire 10 protruded from its tip are allowed to confront a defective part 13, and an arc 15 is generated between both of them. Subsequently, a temperature of water or vapor 14 in a piping 12 rises and the water or vapor is going to bleed out through the defective part, but shielding gas is allowed to flow intermittently from an inner cavity of the hollow W electrode 9, and the water or vapor is pushed in the direction as indicated with an arrow into the piping 12. The arc 15 and a molten pool which is formed are stabilized the welding wire 10 is supplied automatically thereto and a sound weld bead 16 is formed. In such a way, while suppressing bleeding an internal fluid from the defective part of the piping, sound repair welding can be performed.

19. 发明专利

JPS62222020A METHOD FOR REDUCING RESIDUAL STRESS IN TWO-PHASE STAINLESS STEEL STRUCTURE 失效
公开(公告)号：JPS62222020A
公开(公告)日：1987-09-30
申请号：JP6392186
申请日：1986-03-24
申请人： MITSUBISHI HEAVY IND LTD , NIPPON STAINLESS STEEL CO , SUMITOMO METAL IND
发明人： TOKURA TAKAYUKI , MATSUMOTO HISAFUMI , WATANABE TETSURO , KAWAGUCHI SEIICHI , IMADA TAKEHIKO , YAMAZAKI KATSUO , TAKASO MASASHI
IPC分类号： C21D6/00
摘要： PURPOSE:To reduce the residual stress in a two-phase stainless steel structure by heating and holding the structure at a specified temp. and rapidly cooling it to inhibit embrittlement. CONSTITUTION:A two-phase stainless steel structure is heated to 500-650 deg.C between the temp. range in which carbides and sigma-phase are precipitated and the temp. range in which embrittlement is caused and the heated structure is held at the temp. for a limited time to inhibit embrittlement caused at about 450 deg.C and to reduce the residual stress. The held structure is rapidly cooled from the temp. to inhibit embrittlement due to brittleness at 457 deg.C. This method is effective in reducing residual stress produced in a cast monolithic structure during soln. heat treatment, welding or bending.

20. 发明专利

JPS61253180A TIG ARC WELDING METHOD FOR REPAIRING 失效
公开(公告)号：JPS61253180A
公开(公告)日：1986-11-11
申请号：JP9227485
申请日：1985-05-01
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAMEI HIROMASA , TADA YOSHIHIRO , IMADA TAKEHIKO , FUKUNAGA YOSHIAKI , SHIRATA HARUO , MURAKAMI YUICHI
IPC分类号： B23K31/00 , B23K9/04 , B23K9/16 , B23K9/167
摘要： PURPOSE:To improve a welding quality and welding operability by welding by inserting a tungsten electrode and welding wire with access thereto inside the hole after removing in a small area the defective part of the defect generated in a welding zone. CONSTITUTION:The electrifying body 3 fitting the welding wire 1 and tungsten electrode 4 and insulating tip 2 are integrally turned at the position apart in several mm from the hole wall inside the hole part 7a of a base metal 7 and the current in the same direction as that of the welding arc is continuously or intermittently fed via the feeding tip from a wire heating power source 11 to the welding wire 1 to perform the welding with the welding arc 5 directed for the hole wall direction of the base metal 7. The welding work man-hour is thus reduced and the welding quality and welding operability can be improved as well.

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