WO2023013386A1 - シールド治具及びガスシールドアーク溶接装置 - Google Patents
シールド治具及びガスシールドアーク溶接装置 Download PDFInfo
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- WO2023013386A1 WO2023013386A1 PCT/JP2022/027859 JP2022027859W WO2023013386A1 WO 2023013386 A1 WO2023013386 A1 WO 2023013386A1 JP 2022027859 W JP2022027859 W JP 2022027859W WO 2023013386 A1 WO2023013386 A1 WO 2023013386A1
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- gas
- shield
- outer shell
- shielding
- shell member
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- 238000003466 welding Methods 0.000 title claims abstract description 173
- 239000006185 dispersion Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 38
- 239000011324 bead Substances 0.000 claims description 27
- 239000000945 filler Substances 0.000 claims description 27
- 230000002093 peripheral effect Effects 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 7
- 239000010936 titanium Substances 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 224
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 24
- 238000002347 injection Methods 0.000 description 16
- 239000007924 injection Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 239000012535 impurity Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000001569 carbon dioxide Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000003570 air Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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- 238000003860 storage Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/28—Supporting devices for electrodes
- B23K9/29—Supporting devices adapted for making use of shielding means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/28—Supporting devices for electrodes
- B23K9/29—Supporting devices adapted for making use of shielding means
- B23K9/291—Supporting devices adapted for making use of shielding means the shielding means being a gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
- B23K9/325—Devices for supplying or evacuating shielding gas
Definitions
- the present invention relates to shield jigs and gas-shielded arc welding equipment.
- Gas shielded arc welding in which a shield gas (inert gas) is supplied to the weld to shield the weld from the air and prevent oxidation.
- a welding torch used for such gas-shielded arc welding is described in Patent Document 1, for example.
- a shield gas passage provided in the welding torch and a control gas passage for controlling the cross-sectional shape of the weld bead are independent passages, and are symmetrical with respect to the welding progress direction around the welding arc portion. , the above passages are arranged in a vertical row. According to this, in the welding of a narrow gap, the cross-sectional shape and penetration of the welding bead are improved by providing a front shield gas flow path and a rear shield gas flow path to control the flow velocity of the gas. It is described in.
- the shielding area covered by the shielding gas is narrow in the current shield jig, it also guarantees the gas shielding performance of the surrounding welding bead that becomes hot adjacent to the welding bead during lamination manufacturing. becomes difficult. Furthermore, depending on the direction in which welding proceeds, gas shielding may be insufficient, which may limit layered manufacturing using a manipulator.
- an object of the present invention is to provide a shield jig and a gas-shielded arc welding apparatus that can always stably secure a wide range of gas-shielding properties during gas-shielded arc welding.
- the present invention consists of the following configurations.
- a shield jig attached to a welding torch for shield welding that melts and solidifies a metal filler material to form a weld bead, a first outer shell member that surrounds the welding torch and is arranged with a radial gap from the welding torch to define a first annular space having a first opening at the bottom; a first gas supply member disposed inside the first outer shell member so as to surround the welding torch and supplying shielding gas to the first annular space; a dispersing member disposed below the first gas supply member in the first annular space and dispersing the shielding gas;
- a shield jig comprising a
- a gas-shielded arc welding apparatus comprising the shield jig according to (1).
- FIG. 1 is a schematic configuration diagram of a gas-shielded arc welding apparatus.
- FIG. 2 is a perspective view of the shield nozzle at the tip of the welding torch and the shield jig of the first configuration example provided on the outer periphery of the shield nozzle.
- FIG. 3 is a schematic cross-sectional view showing the internal structure of the shield nozzle.
- FIG. 4 is a schematic cross-sectional view showing the internal structure of the shield jig of the first configuration example.
- FIG. 5 is an explanatory view schematically showing the welding torch during welding and the flow of shield gas by the shield jig of the first configuration example.
- FIG. 6A is a plan view schematically showing a weld bead formed using a shield jig.
- FIG. 6B is a side view schematically showing a weld bead formed using a shield jig.
- FIG. 7 is a graph showing the relationship between the oxygen content and the nitrogen content in the welding bead of each test example shown in FIG.
- FIG. 8 is a schematic cross-sectional view showing the internal structure of the shield jig of the second configuration example.
- FIG. 9 is an explanatory view schematically showing the welding torch during welding and the flow of shielding gas by the shielding jig of the second configuration example.
- FIG. 10 is a perspective view showing a schematic configuration of a modified shield jig provided with a rectifying section for controlling the flow direction of the shield gas in the shield jig of the second configuration example.
- FIG. 10 is a perspective view showing a schematic configuration of a modified shield jig provided with a rectifying section for controlling the flow direction of the shield gas in the shield jig of the second configuration example.
- FIG. 11A is a partial cross-sectional view of the bottom portion of the shield jig for explaining the state of the shield gas jetted from the shield jig.
- FIG. 11B is a cross-sectional view of the formed gas curtain taken along line XI-XI shown in FIG. 11A, for explaining the state of the shield gas jetted from the shield jig.
- FIG. 1 is a schematic configuration diagram of a gas-shielded arc welding apparatus.
- a gas-shielded arc welding apparatus 100 which is a laminate-molded article manufacturing apparatus, includes a welding robot 11, a robot drive unit 13, a filler material supply unit 15, a shield gas supply unit 17, a welding power supply unit 19, and a control unit. 21 and.
- the welding robot 11 is an articulated robot, and a welding torch 23 is supported on the tip shaft.
- the position and posture of the welding torch 23 can be arbitrarily set three-dimensionally within the range of degrees of freedom of the robot arm.
- the welding torch 23 holds the filler material M continuously supplied from the filler material supply unit 15 in a state of protruding from the tip of the welding torch.
- the shield gas supply unit 17 supplies inert gas to the welded portion.
- argon, helium (or a mixed gas thereof), or a gas obtained by adding a small amount of active gas such as oxygen or carbon dioxide is used as a shielding gas.
- MAG welding carbon dioxide gas or a mixed gas of argon and carbon dioxide gas is used as the shield gas
- TIG welding argon gas is used.
- nitrogen, argon, helium or the like is used as a shield gas.
- the welding torch 23 is a welding torch for shield welding that melts and solidifies a metal filler material M to form a welding bead.
- the welding torch 23 has a shield nozzle 25 that receives the shield gas supplied from the shield gas supply unit 17 (see FIGS. 2 to 5), and the shield gas is supplied from the shield nozzle 25 to the welding portion.
- the arc welding method may be a consumable electrode type such as coated arc welding or carbon dioxide gas arc welding, or a non-consumable electrode type such as TIG welding or plasma arc welding, and is appropriately selected according to the layered product to be manufactured. be.
- the heat source for melting the filler material M is not limited to the arc described above.
- a heat source using other methods such as a heating method using both an arc and a laser, a heating method using plasma, a heating method using an electron beam or a laser, or the like may be employed.
- the amount of heating can be more finely controlled, the state of the welding bead can be maintained more appropriately, and the quality of the laminate-molded product can be further improved.
- the filler material is made of pure titanium or titanium alloy, for example, a welding wire for welding titanium and titanium alloys (see, for example, JIS Z 3331). If the filler material is pure titanium or a titanium alloy, proper welding can be performed even when the base metal for welding is a titanium-based material. In addition, the filler material is not limited to the above materials, and other materials may be used.
- a shield jig 31 is attached to the outer circumference of the welding torch 23 .
- the shielding jig 31 is supplied with the shielding gas from the shielding gas supply section 17 and injects the shielding gas toward the welding portion. Details of the shield jig 31 will be described later.
- the robot drive unit 13 receives instructions from the control unit 21, drives each part of the welding robot 11, and controls the output of the welding power source as necessary.
- the control unit 21 is composed of a computer device including a CPU, memory, storage, etc., and executes a drive program prepared in advance or a drive program created under desired conditions to drive each part such as the welding robot 11. As a result, the welding torch 23 is moved according to the driving program, and a plurality of layers of welding beads B are laminated on the base plate 29, thereby forming a layered article having a multilayer structure.
- FIG. 2 is a perspective view of the shield nozzle 25 at the tip of the welding torch 23 and the shield jig 31 of the first configuration example provided on the outer periphery of the shield nozzle 25 .
- the shield gas supply section 17 supplies shield gas to both the welding torch 23 and the shield jig 31 .
- the shield nozzle 25 of the welding torch 23 protrudes the filler material M at the tip of the nozzle and jets the shield gas G0 supplied from the shield gas supply unit 17 toward the welded portion below.
- FIG. 3 is a schematic cross-sectional view showing the internal structure of the shield nozzle 25.
- the shield nozzle 25 shown here is of a consumable electrode type.
- a contact tip 27 is arranged inside the shield nozzle 25, and the contact tip 27 holds a filler material M to which a melting current is supplied.
- the welding torch 23 holds the filler material M and generates an arc from the tip of the filler material M in a shield gas atmosphere.
- the filler material M is fed to the welding torch 23 by a feeding mechanism (not shown) attached to a portion of the welding robot 11 shown in FIG.
- the continuously fed filler material M is melted and solidified to form a weld bead B, which is a melted and solidified body of the filler material M, on the base plate 29 .
- the shield gas G0 supplied from the shield gas supply unit 17 is injected through the internal space S0 defined inside the shield nozzle 25, and is injected around the filler material M. gas shield.
- a first gas supply pipe 33 is connected to the shield jig 31 shown in FIG.
- the tip of the first gas supply pipe 33 penetrates the upper surface of the shield jig 31 and is inserted into the jig, and is connected to the annular first hollow pipe 35 .
- the first hollow pipe 35 is arranged above the first annular space S1 inside the jig, and has a plurality of injection ports 35a formed at equal intervals along its entire circumference.
- the shielding gas G1 supplied from the first gas supply pipe 33 is jetted upward from the injection port 35a of the first hollow pipe 35, and then directed downward in the first annular space S1.
- FIG. 4 is a schematic cross-sectional view showing the internal structure of the shield jig 31 of the first configuration example.
- the shield jig 31 is provided on the outer circumference of the shield nozzle 25 provided at the tip of the welding torch 23 .
- the shield jig 31 includes a first outer shell member 32A, a first gas supply member 38A, and a dispersion member 41. As shown in FIG.
- the first outer shell member 32A covers the periphery of the welding torch 23, is disposed outside the outer peripheral surface of the welding torch 23 with a radial clearance, and defines a first annular space S1 having a first opening 37A at the bottom. Define.
- the first outer shell member 32A is composed of a sheet metal member having a substantially cylindrical outer peripheral surface. A hole is provided in the center of the upper surface of the first outer shell member 32A, and the shield nozzle 25 passes through this hole. fixed in some way.
- the material, structure, etc. of the first outer shell member 32A are not particularly limited.
- the first gas supply member 38A includes a first gas supply pipe 33 and a first hollow pipe 35.
- the first gas supply pipe 33 is composed of a straight hollow pipe penetrating the upper surface of the first outer shell member 32A.
- the first hollow pipe 35 is composed of an annular hollow pipe arranged in the first annular space S1, and has a plurality of injection ports 35a for supplying shielding gas on its upper surface. That is, the first gas supply member 38A is arranged in the first annular space S1 so as to surround at least the outer peripheral surface of the welding torch 23, and a plurality of injection ports 35a for supplying the shielding gas are provided with the injection direction facing upward. ing.
- the shielding gas that has passed through the first gas supply pipe 33 is supplied to the first hollow pipe 35 and is uniformly injected over the entire circumference of the first hollow pipe 35 from the injection port 35a of the first hollow pipe 35 . After that, the injected shielding gas flows downward in the first annular space S1, passes through the dispersion member 41 supported by the holding member 42, and enters the first opening 37A formed in the bottom surface of the first annular space S1. reach.
- the dispersing member 41 is arranged below the first gas supply member 38A in the first annular space S1 and serves to disperse the shielding gas supplied from the first gas supply member 38A in the first annular space S1. .
- a hole is provided in the center of the dispersion member 41, and the shield nozzle 25 passes through this hole.
- the outer periphery of the dispersion member 41 has a circular shape that contacts the inner peripheral surface of the first outer shell member 32A.
- the dispersing member 41 is made of a fibrous member such as glass wool or steel wool, and disperses the shielding gas inside the first annular space S1.
- the material of the dispersing member 41 may be a material other than the above, and is not particularly limited.
- the holding member 42 can be composed of, for example, a mesh member made of stainless steel through which the shielding gas can pass, but the material, shape, and the like of the holding member 42 are not particularly limited. Further, the holding member 42 may have a mesh size of 0.1 mm to 1.0 mm, preferably 0.3 mm to 0.7 mm, for example, so as to have a gas rectifying function. In that case, the holding member 43 also functions as a distributing member.
- the outer periphery of the holding member 42 is fixed to the inner peripheral surface of the first outer shell member 32A by welding or the like, and the dispersion member 41 is placed or attached on the upper surface of the holding member 42. Therefore, the holding member 42 can stably hold the dispersion member 41 in the first annular space S1.
- the holding member 42 may directly join the outer periphery of the dispersion member 41 to the inner peripheral surface of the first outer shell member 32A, in which case the holding member 42 may be omitted.
- the shield jig 31 configured as described above, the first hollow pipe 35 surrounding the welding torch 23 injects the shielding gas, and the dispersing member 41 disperses the shielding gas flowing through the first annular space S1. Therefore, according to this shield jig 31, the entire circumference of the welded portion can be gas-shielded in a wide range and evenly, as compared with a jig such as an after-shield jig that is generally used in welding.
- the bottom of the first outer shell member 32A is formed with a narrowed portion 45 in which the radial distance of the first outer shell member 32A gradually decreases along the axial direction of the welding torch 23. It may be composed of a straight-shaped cylindrical body.
- the outer diameter d 0 of the welding torch 23 (shield nozzle 25) and the outer diameter d 1 of the first outer shell member 32A have a relationship of d 1 >d 0 .
- the flow velocity of the shielding gas injected from the first opening 37A which is the opening of the first annular space S1
- Vout the flow velocity of the shielding gas supplied to the first annular space S1
- Vin the first opening 37A is The flow velocity Vout of the shielding gas from is obtained by equation (1).
- the shielding jig 31 is configured so that the flow velocity Vout of the shielding gas injected from below the first annular space S1 is 113.17 mm/sec or more, the velocity Vin of the source of the shielding gas, and the outer diameter d 0 , and the outer diameter d1 of the first outer shell member 32A is set.
- the source plug velocity Vin of the shield gas corresponds to the gas velocity corresponding to the gas supply pressure from the shield gas supply section 17 .
- the flow velocity Vout of the shielding gas injected from the first annular space S1 By setting the flow velocity Vout of the shielding gas injected from the first annular space S1 to 113.17 mm/sec or higher in this way, a necessary and sufficient amount of the shielding gas can flow forward in the welding progress direction. It is possible to effectively suppress entrainment of air, oxygen, nitrogen, etc. adhering to various members into the welded portion.
- the outer diameter d1 of the first outer shell member 32A is set to a predetermined size or more, the weld bead, which is close to the weld bead being welded and can reach a high temperature, can be kept under the shielding gas atmosphere. becomes possible. Therefore, reliable gas shielding can be ensured.
- the size (radial distance) of the first outer shell member 32A it is possible to suppress fluctuations in gas shielding properties due to the welding direction, and to improve the degree of freedom in modeling by the welding robot.
- a high gas shield effect can be obtained by appropriately setting the inner and outer diameters of the first outer shell member 32A according to the flow rate of the shielding gas to be used. can.
- the shielding gas G1 ejected from the first opening 37A forms a cylindrical curtain.
- the first opening 37A has an annular shape continuous in the circumferential direction, the configuration is not limited to this, and many openings may be arranged in the circumferential direction, and the shape of the first opening 37A is not particularly limited.
- FIG. 5 is an explanatory view schematically showing the welding torch 23 during welding and the shielding gas flow by the shielding jig 31 of the first configuration example.
- a shield gas G0 is jetted from the shield nozzle 25 at the tip of the welding torch 23 .
- the shield jig 31 also jets the shield gas G1 supplied to the first annular space S1 in an annular manner toward the base plate 29 from the entire circumference of the first opening 37A.
- the shielding gas G1 injected from the first opening 37A forms a cylindrical gas curtain.
- the shielding gas G1 confines the shielding gas G0 injected from the welding torch 23 inside the formed gas curtain, and has the effect of blocking the inflow of air Air from the outside.
- the welding bead B being welded is effectively isolated from external air, oxygen, nitrogen, etc. adhering to other members, and impurities can be suppressed from entering the laminate-molded article W.
- the injection direction of the shield gas G2 from the shield jig 31 approaches the welding torch 23 side due to the narrowed portion 45 at the bottom of the first outer shell member 32A.
- the position where the shielding gas G0 from the welding torch 23 hits the welded portion and the position where the shielding gas G1 from the shield jig 31 hits the welded portion become closer, and it can be expected that the effect of retaining the shielding gas is enhanced.
- FIG. 6A is a plan view schematically showing a weld bead formed using a shield jig.
- FIG. 6B is a side view schematically showing a weld bead formed using a shield jig.
- two types of shield jigs having an outer diameter d1 of ⁇ 100 mm (Test Example 1) and ⁇ 150 mm (Test Example 2) were prepared, and three rows of shielding jigs were placed on the base plate 29 under the following conditions. Three layers of welding bead B were formed.
- Filler material Titanium wire (manufactured by Daido Steel Co., Ltd.) Welding speed: 20 cpm Filler feed rate: 6.2 mpm Shield gas: Argon gas Shield gas supply to welding torch: 20 L/min Amount of shield gas supplied to shield jig: 50 L/min Axial length of shield jig: 50mm Welding torch outer diameter: ⁇ 25mm Annular diameter of the first hollow pipe: ⁇ 80 mm Holding member: Stainless steel net with a mesh size of 0.5 mm spread
- the order of formation of the welding beads B is indicated by numbers in FIG. 6B. Formation of the welding bead B was carried out by producing two samples for each of Test Examples 1 and 2, a total of four samples.
- FIG. 7 is a graph showing the relationship between the oxygen content and the nitrogen content in the welding bead B of each test example shown in FIGS. 6A and 6B.
- the intrusion of oxygen and nitrogen is kept low.
- the oxygen content and the nitrogen content are lower than in test example 1. This is because, if the amount of shielding gas supplied to the shielding jig is constant, the smaller the outer diameter d1, the faster the flow rate of the gas jetted from the shielding jig, which improves the gas shielding property and reduces the air flow caused by the arc heat. This is thought to be due to the fact that the entrainment of the
- the flow velocity of the shielding gas injected from the first opening 37A was 48.05 mm/sec in Test Example 1 and 113.17 mm/sec in Test Example 2. If the flow velocity is equal to or higher than that of Test Example 2, the intrusion of impurities can be suppressed more reliably, and good welding can be performed.
- FIG. 8 is a schematic cross-sectional view showing the internal structure of the shield jig 31A of the second configuration example.
- a shield jig 31A of this configuration includes a second outer shell member 32B and a second gas supply member 38B in addition to the configuration of the shield jig 31 of the first configuration example.
- the second outer shell member 32B is arranged with a radial gap outside the outer peripheral surface of the first outer shell member 32A, and defines a second annular space S2 with the first outer shell member 32A.
- the upper portion of the second annular space S2 is closed with a lid portion 39, and the bottom portion of the second annular space S2 has a second opening 37B.
- the outer peripheral surface of the second outer shell member 32B has a cylindrical shape . d 2 >d 1 >d 0 is established when the inner diameter of is d 2 .
- the second outer shell member 32B is composed of a substantially cylindrical sheet metal member. A hole is provided in the center of the upper surface of the second outer shell member 32B, and the first outer shell member 32A is fixed to this hole.
- the material, structure, etc. of the second outer shell member 32B are not particularly limited.
- the second gas supply member 38B includes a second gas supply pipe 34 and a second hollow pipe 36.
- the second gas supply pipe 34 is composed of a straight hollow pipe penetrating the upper surface of the second outer shell member 32B.
- the second hollow pipe 36 is composed of an annular hollow pipe arranged in the second annular space S2, and has a plurality of injection ports 36a for supplying shielding gas on its upper surface. That is, the second gas supply member 38B is arranged in the second annular space S2 so as to surround at least the outer peripheral surface of the first outer shell member 32A, and the plurality of injection ports 36a are provided with the shield gas injection direction facing upward.
- the shielding gas that has passed through the second gas supply pipe 34 is supplied to the second hollow pipe 36 and is uniformly injected over the entire circumference of the second hollow pipe 36 from the injection port 36a of the second hollow pipe 36 . After that, the injected shielding gas flows downward in the second annular space S2 and reaches the second opening 37B formed in the bottom surface of the second annular space S2.
- FIG. 9 is an explanatory view schematically showing the welding torch 23 during welding and the flow of shielding gas by the shield jig 31A of the second configuration example.
- the shield nozzle 25 at the tip of the welding torch 23 injects the filler material M and the shield gas G0.
- the shield jig 31A spreads the shield gas G1 supplied to the first annular space S1 and the shield gas G2 supplied to the second annular space S2 from the entire circumference of the first opening 37A and the second opening 37B to the welding torch. 23 is injected in an annular shape toward the tip side.
- the shielding gas G1 injected from the first opening 37A forms a cylindrical gas curtain.
- the shielding gas G1 has the effect of confining the shielding gas G0 injected from the welding torch 23 inside the formed gas curtain and blocking the inflow of air Air from the outside.
- the welding bead B being welded is effectively isolated from outside air, oxygen, nitrogen, etc. adhering to other members, and impurities can be suppressed from entering the laminate-molded article W.
- the shielding gas G2 injected from the second opening 37B also forms a cylindrical gas curtain.
- the shielding gas G2 has the effect of confining the shielding gas G0 injected from the welding torch 23 and the shielding gas G1 injected from the first opening 37A inside the formed gas curtain and blocking the inflow of air Air from the outside. play.
- the injection speed of the shield gas G2 is faster than the injection speed of the shield gas G1 due to the difference in the opening area of the bottom.
- the shielding gas G2 on the outside embraces the shielding gas G1 on the inside, forming a double gas curtain. Therefore, the synergistic effect of the shield gases G1 and G2 can further suppress the entry of impurities into the laminate-molded article W from the outside.
- a narrowed portion 45 is formed at the bottom of the second outer shell member 32B along the axial direction of the welding torch 23 so that the radial distance of the second outer shell member 32B gradually decreases.
- a corresponding narrowed portion 46 is also formed in the bottom portion of the first outer shell member 32A.
- the radial gap between the narrowed portion 45 and the narrowed portion 46 is constant along the circumferential direction, and is set substantially equal to the size of the radial gap (d 2 ⁇ d 1 )/2 other than the bottom portion.
- the shield jig 31A may be configured as a straight cylindrical body without the constricted portions 45 and 46. As shown in FIG.
- the outer diameter of the welding torch 23 is d 0
- the outer diameter of the first outer shell member 32A is d 1
- the inner diameter of the second outer shell member 32B is d 2
- the relative sizes of the first outer shell member 32A and the second outer shell member 32B with respect to the welding torch 23 are designed so that 2 -d 1 is established.
- the radial width of the first annular space S1 becomes larger than the radial width of the second annular space S2, and the amount of shielding gas can be saved.
- the shield gas supply source is the single shield gas supply unit 17 (FIG. 2), and the shield gas supply unit 17 includes the welding torch 23, the first gas supply member 38A, and the second gas supply member 38A.
- a shielding gas is supplied to each of the members 38B.
- the shielding gas supply section 17 controls the supply of the shielding gas to a specified constant amount. Therefore, the supply pressure of the shielding gas to the welding torch 23 is controlled to be constant.
- the shield jig 31A receives the same gas supply pressure as the gas supply pressure of the welding torch 23 and injects the shield gas G1 and the shield gas G2. The flow velocity of G2 increases.
- gas curtains having different flow velocities can be easily generated on the inner peripheral side and the outer peripheral side, and the gas shielding property can be improved.
- gas curtain on the outer peripheral side where the flow velocity is fast is made thinner than the gas curtain on the inner peripheral side where the flow velocity is slow, gas consumption can be suppressed.
- the supply of the shielding gas G1 may be stopped and the shielding gas may be supplied only to the second annular space S2. In that case, shield gas consumption can be saved while maintaining a sufficient gas shield effect.
- FIG. 10 is a perspective view showing a schematic configuration of a modified shield jig 31B provided with a rectifying section 47 for controlling the flow direction of the shield gas G2 in the shield jig 31A of the second configuration example.
- FIG. 10 shows only the lower portion of the second gas supply member 38B in the second outer shell member 32B.
- the shield jig 31B of the modified example has a rectifying portion 47 in the second annular space S2 inside the second outer shell member 32B.
- the rectifying section 47 is provided in the second annular space S2 and spirals the flow of the shielding gas G2.
- the rectifying portion 47 can be formed, for example, by arranging sheet metal fins 49 between the outer surface of the first outer shell member 32A and the inner surface of the second outer shell member 32B.
- the fins 49 are arranged at regular intervals along the circumferential direction and define multiple rows of spiral gas flow paths 51 .
- the flow direction of the shielding gas G2 flowing through each gas flow path 51 is regulated by the fins 49, and the shielding gas G2 is jetted as a spiral airflow from the second opening 37B. As a result, an annular gas curtain rotating in the circumferential direction is formed.
- the rectifying section 47 is composed of the fins 49, it is not limited to this.
- a rifling-like spiral hole or groove may be formed in the outer peripheral surface of the first outer shell member 32A or the inner peripheral surface of the second outer shell member 32B.
- the straightening section 47 may have a configuration in which a plurality of injection nozzles for injecting the shielding gas are arranged at the bottom of the second annular space S2 in a state in which the injection direction is inclined in the circumferential direction.
- FIG. 11A is a partial cross-sectional view of the bottom of the shield jig 31B for explaining the state of the shield gas G2 jetted from the shield jig 31B.
- FIG. 11B is a cross-sectional view of the formed gas curtain taken along the line XI-XI shown in FIG. 11A, for explaining the state of the shield gas G2 jetted from the shield jig 31B.
- the shielding gas G2 ejected from the second opening 37B of the second annular space S2 forms a gas curtain CT that is spirally flowed by the rectifying section 47 described above, and is shown in FIG. 8B.
- the cross section becomes a continuous ring.
- the gas curtain CT having this helical flow, since the shielding gas is rotated, it is possible to more reliably prevent air from flowing into the welded portion and further improve the gas shielding effect of the welded portion.
- the shielding gas is spouted while rotating, it is possible to prevent entrainment of residual air in the piping of the shielding gas.
- the supply of the shielding gas G1 is stopped, and the shielding gas is supplied only to the second annular space S2. Consumption can be saved.
- the fumes generated during welding may be sucked by separately providing a suction path in the gas curtain.
- the shield jigs 31, 31A, and 31B described above since they have a cylindrical shape centered on the welding torch 23, an annular gas curtain centered on the welding torch 23 is formed. Therefore, a gas shielding effect is obtained in any moving direction of the welding torch 23, and the trajectory of the welding torch 23 is not restricted. For example, compared to before shields and after shields that are provided according to the traveling direction of the welding torch 23, restrictions on the moving direction of the welding torch 23 can be suppressed, so welding can be performed with a high degree of freedom.
- a shield jig attached to a welding torch for shield welding that melts and solidifies a metal filler material to form a weld bead, a first outer shell member that surrounds the welding torch and is arranged with a radial gap from the welding torch to define a first annular space having a first opening at the bottom; a first gas supply member disposed inside the first outer shell member so as to surround the welding torch and supplying shielding gas to the first annular space; a dispersing member disposed below the first gas supply member in the first annular space and dispersing the shielding gas;
- a shield jig comprising a According to this shield jig, the entire circumference of the welded portion can be gas-shielded over a wide range.
- Vout is the flow velocity of the shielding gas injected from the first opening
- Vin is the flow velocity of the shielding gas supplied to the first annular space
- d0 is the outer diameter of the welding torch
- d0 is the outer diameter of the welding torch.
- this shield jig it is possible to effectively suppress the entrainment of impurities into the welded portion.
- the shield jig according to (1) or (2) further comprising a holding member attached to the inner peripheral surface of the first outer shell member in the first annular space and holding the dispersion member. According to this shield jig, the dispersion member can be stably held in the first annular space.
- the shield jig Arranged on the outside of the outer peripheral surface of the first outer shell member with a radial gap, and having a lid portion at the top and a second opening at the bottom portion between the first outer shell member and the first outer shell member. a second outer shell member defining a second annular space; a second gas supply member that supplies the shielding gas to the second annular space;
- the shield jig according to any one of (1) to (4), further comprising: According to this shield jig, it is possible to further enhance the effect of suppressing the intrusion of impurities into the welded portion.
- the shield jig When the outer diameter of the welding torch is d0 , the outer diameter of the first outer shell member is d1 , and the inner diameter of the second outer shell member is d2, d 1 ⁇ d 0 >d 2 ⁇ d 1 is established, the shield jig according to (5). According to this shield jig, since the difference in radial length between the outer circumference of the first outer shell member and the outer circumference of the welding torch is greater than the radial width of the annular space, the diameter of the first annular space from the welding torch Shield gas can also be injected at positions farther than the width of the direction. As a result, the shielding gas can be retained in the space around the welding torch.
- At least the bottom of the second outer shell member is formed with a narrowed portion in which the radial distance of the second outer shell member gradually decreases along the axial direction of the welding torch, (5) to (8) ).
- this shield jig the point at which the shielding gas injected from the welding torch and the shielding gas injected from the second annular space collide with each other is closer to the welding torch side, and the shielding gas stays. It is expected that the effect will be enhanced.
- a gas-shielded arc welding apparatus comprising the shield jig according to any one of (1) to (10). According to this gas-shielded arc welding apparatus, high gas-shielding properties can be obtained, and stable gas-shielded arc welding can be performed.
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Abstract
Description
(1) 金属製の溶加材を溶融及び凝固させて溶着ビードを形成するシールド溶接用の溶接トーチに取り付けられるシールド治具であって、
前記溶接トーチの周囲を覆うとともに、前記溶接トーチとの間に径方向隙間を有して配置され、底部に第1開口を有する第1環状空間を画成する第1外殻部材と、
前記第1外殻部材の内部に前記溶接トーチを取り囲んで配置され、前記第1環状空間にシールドガスを供給する第1ガス供給部材と、
前記第1環状空間の前記第1ガス供給部材よりも下方に配置され、前記シールドガスを分散する分散部材と、
を備えるシールド治具。
(2) (1)に記載のシールド治具を備えたガスシールドアーク溶接装置。
本発明に係るシールド治具は、ここではガスシールドアーク溶接により積層造形物を造形する場合を例に説明するが、本発明はこれに限らない。
積層造形物の製造装置であるガスシールドアーク溶接装置100は、溶接ロボット11と、ロボット駆動部13と、溶加材供給部15と、シールドガス供給部17と、溶接電源部19と、制御部21と、を備える。
図2は、溶接トーチ23の先端のシールドノズル25、シールドノズル25の外周に設けられる第1構成例のシールド治具31の斜視図である。
上述したように、シールドガス供給部17は、溶接トーチ23及びシールド治具31の双方にシールドガスを供給する。溶接トーチ23のシールドノズル25は、ノズル先端部で溶加材Mを突出させるとともに、シールドガス供給部17から供給されたシールドガスG0を下方の溶接部に向けて噴射する。
ここで示すシールドノズル25は消耗電極式である。シールドノズル25の内部には、コンタクトチップ27が配置され、溶融電流が給電される溶加材Mがコンタクトチップ27に保持される。溶接トーチ23は、溶加材Mを保持しつつ、シールドガス雰囲気で溶加材Mの先端からアークを発生する。溶加材Mは、図1に示す溶接ロボット11の一部に取り付けた不図示の繰り出し機構により溶接トーチ23に送給される。溶接トーチ23が移動しつつ、連続送給される溶加材Mを溶融及び凝固させることで、ベースプレート29上に溶加材Mの溶融凝固体である溶着ビードBが形成される。このとき、溶接トーチ23からは、シールドガス供給部17から供給されたシールドガスG0が、シールドノズル25の内部に画成された内部空間S0を通過して噴射され、溶加材Mの周囲をガスシールドする。
シールド治具31は、溶接トーチ23の先端に設けられたシールドノズル25の外周に設けられる。シールド治具31は、第1外殻部材32Aと、第1ガス供給部材38Aと、分散部材41とを備える。
溶接トーチ23が移動して、ベースプレート29上に複数層の溶着ビードBを積層することで、多層構造の積層造形物Wが造形される。その際、溶接トーチ23の先端のシールドノズル25からは、シールドガスG0が噴射される。また、シールド治具31は、第1環状空間S1に供給されたシールドガスG1を、第1開口37Aの全周からベースプレート29に向けて環状に噴射する。
本試験例においては、外周径d1がφ100mm(試験例1)と、φ150mm(試験例2)との2種類のシールド治具を用意して、下記条件の下、ベースプレート29上に3列×3層の溶着ビードBを形成した。
溶加材:チタンワイヤ(大同特殊鋼社製)
溶接速度:20cpm
溶加材送給速度:6.2mpm
シールドガス:アルゴンガス
溶接トーチへのシールドガス供給量:20L/min
シールド治具へのシールドガス供給量:50L/min
シールド治具の軸長:50mm
溶接トーチの外周径:φ25mm
第1中空パイプの環状径:φ80mm
保持部材:見開き0.5mmの網目サイズを有するステンレス製網
図8は、第2構成例のシールド治具31Aの内部構造を示す概略断面図である。
本構成のシールド治具31Aは、第1構成例のシールド治具31の構成に加え、第2外殻部材32Bと、第2ガス供給部材38Bとを備える。
溶接トーチ23が移動して、ベースプレート29上に複数層の溶着ビードBを積層することで、多層構造の積層造形物Wが造形される。この際、溶接トーチ23の先端のシールドノズル25は、溶加材MとともにシールドガスG0を噴射する。また、シールド治具31Aは、第1環状空間S1に供給されたシールドガスG1及び第2環状空間S2に供給されたシールドガスG2を、第1開口37A及び第2開口37Bの全周から溶接トーチ23の先端側に向けて環状に噴射する。
図10は、第2構成例のシールド治具31Aにおいて、シールドガスG2の流れ方向を制御する整流部47を設けた変形例のシールド治具31Bの概略構成を示す斜視図である。図10においては、第2外殻部材32Bにおける第2ガス供給部材38Bの下側部分のみを示している。
整流部47は、第2環状空間S2に設けられ、シールドガスG2の流れをらせん状にする。整流部47は、例えば、第1外殻部材32Aの外面と第2外殻部材32Bの内面の間に、板金のフィン49を配置することにより形成できる。
このらせん状の流れを有するガスカーテンCTによれば、シールドガスに回転動作が加わるため、溶接部への空気の流入をより確実に防止でき、溶接部のガスシールド効果を更に向上できる。また、シールドガスが回転しながら噴出するため、シールドガスの配管内における残存空気の巻き込みを防止できる。さらに、この場合にも第1環状空間S1内に存在した空気の排除を完了した後、シールドガスG1の供給を停止し、第2環状空間S2にだけシールドガスの供給を行うことで、シールドガス消費量を節約できる。
(1) 金属製の溶加材を溶融及び凝固させて溶着ビードを形成するシールド溶接用の溶接トーチに取り付けられるシールド治具であって、
前記溶接トーチの周囲を覆うとともに、前記溶接トーチとの間に径方向隙間を有して配置され、底部に第1開口を有する第1環状空間を画成する第1外殻部材と、
前記第1外殻部材の内部に前記溶接トーチを取り囲んで配置され、前記第1環状空間にシールドガスを供給する第1ガス供給部材と、
前記第1環状空間の前記第1ガス供給部材よりも下方に配置され、前記シールドガスを分散する分散部材と、
を備えるシールド治具。
このシールド治具によれば、溶接部の全周を広範囲にガスシールドできる。
このシールド治具によれば、分散部材を第1環状空間に安定して保持できる。
このシールド治具によれば、保持部材に遮蔽部材を設けることで、シールドガスの流量、保持部材からの噴射させる位置を自在に調整できる。
前記第2環状空間に前記シールドガスを供給する第2ガス供給部材と、
をさらに備える、(1)~(4)のいずれか1つに記載のシールド治具。
このシールド治具によれば、溶接部への不純物の侵入を抑制する効果をより高めることができる。
d1-d0>d2-d1
が成立する、(5)に記載のシールド治具。
このシールド治具によれば、第1外殻部材の外周と溶接トーチの外周との径方向長さの差が、環状空間の径方向の幅より大きいため、溶接トーチから第1環状空間の径方向の幅より離れた位置にもシールドガスを噴射できる。これにより、溶接トーチを中心とする空間にシールドガスを滞留させることができる。
が成立する、(6)に記載のシールド治具。
このシールド治具によれば、環状空間の径方向の幅が溶接トーチの外周径より小さくなることで、環状空間からシールドガスが噴射する流速を高められ、ガスシールド効果を向上できる。
このシールド治具によれば、溶接部への空気の流入をより確実に防止でき、溶接部のガスシールド効果を更に向上できる。また、シールドガスが回転しながら噴出するため、シールドガスの配管内における残存空気の巻き込みを防止できる。
このシールド治具によれば、溶接トーチから噴射されるシールドガスと、第2環状空間から噴射されるシールドガスが、互いに衝突する地点が、溶接トーチの側に近づくことになり、シールドガスの滞留効果を高めることが期待できる。
このシールド治具によれば、酸素及び窒素の侵入の影響を受けやすい溶接母材であっても、高品位な溶接を行うことができる。
このガスシールドアーク溶接装置によれば、高いガスシールド性が得られ、安定したガスシールドアーク溶接が可能となる。
13 ロボット駆動部
15 溶加材供給部
17 シールドガス供給部
19 溶接電源部
21 制御部
23 溶接トーチ
25 シールドノズル
27 コンタクトチップ
29 ベースプレート
31,31A,31B シールド治具
32A 第1外殻部材
32B 第2外殻部材
33 第1ガス供給管
34 第2ガス供給管
35 第1中空パイプ
36 第2中空パイプ
37A 第1開口
37B 第2開口
38A 第1ガス供給部材
38B 第2ガス供給部材
41 分散部材
42 保持部材
45 窄み部
47 整流部
49 フィン
51 ガス流路
100 ガスシールドアーク溶接装置
B 溶着ビード
G0,G1,G2 シールドガス
M 溶加材
S0 内部空間
S1 第1環状空間
S2 第2環状空間
W 積層造形物
Claims (19)
- 金属製の溶加材を溶融及び凝固させて溶着ビードを形成するシールド溶接用の溶接トーチに取り付けられるシールド治具であって、
前記溶接トーチの周囲を覆うとともに、前記溶接トーチとの間に径方向隙間を有して配置され、底部に第1開口を有する第1環状空間を画成する第1外殻部材と、
前記第1外殻部材の内部に前記溶接トーチを取り囲んで配置され、前記第1環状空間にシールドガスを供給する第1ガス供給部材と、
前記第1環状空間の前記第1ガス供給部材よりも下方に配置され、前記シールドガスを分散する分散部材と、
を備えるシールド治具。 - 前記第1環状空間において、前記第1外殻部材の内周面に取り付けられ、前記分散部材を保持する保持部材をさらに備える、請求項1に記載のシールド治具。
- 前記第1環状空間において、前記第1外殻部材の内周面に取り付けられ、前記分散部材を保持する保持部材をさらに備える、請求項2に記載のシールド治具。
- 前記保持部材には、前記シールドガスの通過を制限する遮蔽部材が設けられている、請求項3に記載のシールド治具。
- 前記保持部材には、前記シールドガスの通過を制限する遮蔽部材が設けられている、請求項4に記載のシールド治具。
- 前記第1外殻部材の外周面の外側に径方向隙間を有して配置され、前記第1外殻部材との間に、上部に蓋部を有し底部に第2開口を有する第2環状空間を画成する第2外殻部材と、
前記第2環状空間に前記シールドガスを供給する第2ガス供給部材と、
をさらに備える、請求項1~6のいずれか1項に記載のシールド治具。 - 前記溶接トーチの外周径をd0、前記第1外殻部材の外周径をd1、前記第2外殻部材の内周径をd2としたときに、
d1-d0>d2-d1
が成立する、請求項7に記載のシールド治具。 - d0>d2-d1
が成立する、請求項8に記載のシールド治具。 - 前記第2環状空間に前記シールドガスの流れ方向をらせん状にする整流部が設けられている、請求項7に記載のシールド治具。
- 前記第2環状空間に前記シールドガスの流れ方向をらせん状にする整流部が設けられている、請求項8に記載のシールド治具。
- 前記第2環状空間に前記シールドガスの流れ方向をらせん状にする整流部が設けられている、請求項9に記載のシールド治具。
- 前記第2環状空間に前記シールドガスの流れ方向をらせん状にする整流部が設けられている、請求項10に記載のシールド治具。
- 少なくとも前記第2外殻部材の底部に、前記溶接トーチの軸方向に沿って前記第2外殻部材の半径距離が漸減する窄み部が形成されている、請求項7に記載のシールド治具。
- 少なくとも前記第2外殻部材の底部に、前記溶接トーチの軸方向に沿って前記第2外殻部材の半径距離が漸減する窄み部が形成されている、請求項8に記載のシールド治具。
- 少なくとも前記第2外殻部材の底部に、前記溶接トーチの軸方向に沿って前記第2外殻部材の半径距離が漸減する窄み部が形成されている、請求項9に記載のシールド治具。
- 少なくとも前記第2外殻部材の底部に、前記溶接トーチの軸方向に沿って前記第2外殻部材の半径距離が漸減する窄み部が形成されている、請求項10に記載のシールド治具。
- 前記溶加材は純チタン又はチタン合金である、請求項1~6のいずれか1項に記載のシールド治具。
- 請求項1~6のいずれか1項に記載のシールド治具を備えたガスシールドアーク溶接装置。
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EP22852810.5A EP4364878A1 (en) | 2021-08-06 | 2022-07-15 | Shield jig and gas shield arc welding device |
CN202280054123.6A CN117794674A (zh) | 2021-08-06 | 2022-07-15 | 保护夹具以及气体保护电弧焊接装置 |
US18/579,337 US20240342820A1 (en) | 2021-08-06 | 2022-07-15 | Shielding jig and gas-shielded metal arc welding apparatus |
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JP2021129974A JP2023023971A (ja) | 2021-08-06 | 2021-08-06 | シールド治具及びガスシールドアーク溶接装置 |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS394226B1 (ja) * | 1963-01-08 | 1964-04-11 | ||
JPS5435726U (ja) * | 1977-08-15 | 1979-03-08 | ||
JPS6448678A (en) | 1987-08-14 | 1989-02-23 | Babcock Hitachi Kk | Method and equipment for narrow gap welding |
JP2016016430A (ja) * | 2014-07-08 | 2016-02-01 | 日鉄住金パイプライン&エンジニアリング株式会社 | 二重ノズルを備えた溶接装置 |
JP2021129974A (ja) | 2020-02-20 | 2021-09-09 | バイオチューブ株式会社 | 組織体形成装置、組織体形成方法、および結合組織体 |
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2021
- 2021-08-06 JP JP2021129974A patent/JP2023023971A/ja active Pending
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- 2022-07-15 WO PCT/JP2022/027859 patent/WO2023013386A1/ja active Application Filing
- 2022-07-15 US US18/579,337 patent/US20240342820A1/en active Pending
- 2022-07-15 EP EP22852810.5A patent/EP4364878A1/en active Pending
- 2022-07-15 CN CN202280054123.6A patent/CN117794674A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS394226B1 (ja) * | 1963-01-08 | 1964-04-11 | ||
JPS5435726U (ja) * | 1977-08-15 | 1979-03-08 | ||
JPS6448678A (en) | 1987-08-14 | 1989-02-23 | Babcock Hitachi Kk | Method and equipment for narrow gap welding |
JP2016016430A (ja) * | 2014-07-08 | 2016-02-01 | 日鉄住金パイプライン&エンジニアリング株式会社 | 二重ノズルを備えた溶接装置 |
JP2021129974A (ja) | 2020-02-20 | 2021-09-09 | バイオチューブ株式会社 | 組織体形成装置、組織体形成方法、および結合組織体 |
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JP2023023971A (ja) | 2023-02-16 |
CN117794674A (zh) | 2024-03-29 |
US20240342820A1 (en) | 2024-10-17 |
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