WO2018110657A1 - 溶接トーチ及び全姿勢溶接装置 - Google Patents
溶接トーチ及び全姿勢溶接装置 Download PDFInfo
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- WO2018110657A1 WO2018110657A1 PCT/JP2017/044946 JP2017044946W WO2018110657A1 WO 2018110657 A1 WO2018110657 A1 WO 2018110657A1 JP 2017044946 W JP2017044946 W JP 2017044946W WO 2018110657 A1 WO2018110657 A1 WO 2018110657A1
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- Prior art keywords
- flow path
- electrode
- welding torch
- sleeve
- holder
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- 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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/164—Arc welding or cutting making use of shielding gas making use of a moving fluid
-
- 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
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
-
- 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
- B23K9/296—Supporting devices adapted for making use of shielding means the shielding means being a gas using non-consumable electrodes
-
- 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
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/10—Pipe-lines
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
- B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
- B23K9/0286—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections with an electrode moving around the fixed tube during the welding operation
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
- B23K9/0288—Seam welding; Backing means; Inserts for curved planar seams for welding of tubes to tube plates
-
- 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
- B23K9/285—Cooled electrode holders
Definitions
- the present invention relates to a welding torch suitable for an all-position welding apparatus that performs butt welding of tubes, and an all-position welding apparatus equipped with this welding torch.
- Patent Document 1 discloses a welding torch capable of passing through the narrow gap as described above and an all-position welding apparatus including the welding torch.
- the welding torch of Patent Document 1 includes a non-consumable electrode, a collet into which the non-consumable electrode is inserted, a torch body, and a highly rigid porous ring.
- the torch body has a ceiling wall that penetrates the collet, and a body that surrounds the ceiling wall and the shield gas flow path facing the collet.
- the porous ring is joined to the body portion of the torch body so as to close the shield gas flow path, and has a tapered inner peripheral surface that comes into contact with the tip of the collet.
- the tip of the collet in which the non-consumable electrode is inserted is reduced in diameter by the inner peripheral surface of the porous ring, whereby the non-consumable electrode is held by the collet.
- the porous ring of the welding torch of Patent Document 1 is a rigid body with a porosity of 30 to 60%.
- the porous ring is formed integrally with the torch body by, for example, irradiating a metal powder used as a raw material with laser light in a pulse manner using a 3D printer.
- a welding torch is characterized by including a lattice-structure gas lens that rectifies shield gas.
- the all-position welding apparatus is an all-position welding apparatus that performs butt welding between tubes, The welding torch; And a rotation mechanism that rotates the welding torch around the tube.
- the gas lens has a lattice structure.
- the gas lens By making the gas lens a lattice structure, regular gaps are formed in the gas lens formed using a 3D printer. Therefore, the porosity of the gas lens is stabilized as compared with the case where the gas lens is a porous body. Thereby, the improvement of the yield of the welding torch provided with such a gas lens is expected.
- FIG. 1 is a front view of an all-position welding apparatus equipped with a welding torch according to an embodiment of the present invention.
- FIG. 2 is a side view of the all-position welding apparatus shown in FIG.
- FIG. 3 is a plan view of the welding torch.
- FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.
- FIG. 5 is a sectional view taken along line VV in FIG. 6 is a cross-sectional view taken along line VI-VI in FIG.
- FIG. 7 is a plan view of the gas lens.
- FIG. 8 is a partially enlarged plan view of the gas lens.
- FIG. 9 is a sectional view taken along line IX-IX in FIG.
- FIG. 10 is a perspective view of the gas lens.
- FIG. 11 is a plan view of a welding torch according to the second modification.
- 12 is a cross-sectional view taken along line XII-XII in FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG.
- FIG. 14 is a plan view of a welding torch according to the third modification.
- the all-position welding apparatus 1 shown in FIGS. 1 and 2 automatically performs butt welding between the tubes 10.
- the welding method may be TIG (Tungsten Inert Gas) welding, for example.
- the welding apparatus 1 includes a welding torch 3, a rotation mechanism 2 that rotates the welding torch 3 around the tube 10, and three linear motion mechanisms (first linear motion mechanism 12, first motion mechanism) that three-dimensionally moves the welding torch 3.
- first linear motion mechanism 12, first motion mechanism three linear motion mechanisms that three-dimensionally moves the welding torch 3.
- second linear motion mechanism 14 and a third linear motion mechanism 16).
- the first linear motion mechanism 12 moves the welding torch 3 in the axial direction (for example, horizontal direction) of the tube 10, and the second linear motion mechanism 14 and the third linear motion mechanism 16 move the welding torch 3 in the axial direction of the tube 10. It moves in directions orthogonal to each other (for example, the horizontal direction and the vertical direction) on the orthogonal surfaces.
- the welding torch 3 in order to move the welding torch 3 three-dimensionally, it is not always necessary to use three linear motion mechanisms.
- a radial movement mechanism that moves the welding torch 3 in the radial direction of the tube 10 with respect to the rotating member 21 described later may be employed.
- the welding torch 3 is not necessarily moved three-dimensionally, and may be moved two-dimensionally on a plane orthogonal to the axial direction of the tube 10.
- the first linear motion mechanism 12 is attached to a base plate 11 parallel to the axial direction of the tube 10.
- the base plate 11 is provided with a clamp mechanism 18 that clamps the tube 10.
- the second linear motion mechanism 14 is fixed to the movable portion of the first linear motion mechanism 12 via the mounting seat 13.
- the third linear motion mechanism 16 is fixed to the movable part of the second linear motion mechanism 14 via the mounting seat 15. Needless to say, the positions of the first to third linear motion mechanisms 12, 14, 16 can be interchanged with each other.
- the rotation mechanism 2 includes a plate-like table 20 that is orthogonal to the axial direction of the tube 10.
- the table 20 is fixed to the movable part of the third linear motion mechanism 16 via the mounting seat 17.
- a substantially U-shaped rotating member 21 into which the tube 10 can be fitted is rotatably supported.
- the table 20 is also provided with a notch 20a into which the tube 10 can be fitted.
- the rotating member 21 has an arcuate outer peripheral surface when viewed from the axial direction of the tube 10, and external teeth are formed on the outer peripheral surface.
- a motor 26 is attached to the table 20 and a gear train is supported. The gear train transmits torque from the drive gear 25 fixed to the output shaft of the motor 26 to the rotating member 21. In FIG. 2, the gear train and the motor 26 are omitted for simplification of the drawing.
- the gear train includes a large-diameter first driven gear 24 that meshes with the drive gear 25, a pair of second driven gears 23 that mesh with the first driven gear 24, and a pair of gears that mesh with the second driven gear 23 and the rotating member 21.
- a third driven gear 22 is transmitted to the rotating member 21 by the other third driven gear 22.
- the welding torch 3 is fixed, for example, at the center of the rotating member 21 so as to protrude in the axial direction of the tube 10.
- the welding torch 3 includes a plate-like torch main body 4 orthogonal to the radial direction of the tube 10 and a non-consumable electrode 5 supported by the torch main body 4 via an electrode holder 7.
- the non-consumable electrode 5 is for generating an arc between the welded portion of the tube 10.
- the welded part is the bottom part of the groove in the first layer, and the second and subsequent layers. Then, it is the last layer.
- a welding wire (not shown) is supplied between the non-consumable electrode 5 and the welding site from a wire supply device (not shown).
- the welding torch 3 is moved along a predetermined track by the first to third linear motion mechanisms 12, 14, and 16 while being rotated around the tube 10 by the rotation mechanism 2. It is done. At this time, the position of the welding torch 3 is finely adjusted by the first to third linear motion mechanisms 12, 14, and 16 so that the distance from the non-consumable electrode 5 to the welding site becomes a predetermined value.
- the rotating member 21 has conductivity
- the welding torch 3 including the torch body 4 and the non-consumable electrode 5 held thereon has conductivity
- the rotating member 21 supporting the welding torch 3 also has conductivity.
- a notch for inserting a tube is formed at an appropriate position on the table 20 that allows the rotating member 21 to rotate.
- a power supply brush (not shown) is provided between the rotating member 21 and the table 20 so as to continue to be connected to the back surface of the rotating member 21 while the rotating member 21 makes one rotation. In this way, electric power is supplied from the power supply brush to the welding torch 3 via the rotating member 21. Therefore, the lines connected to the welding torch 3 can be reduced, and the total thickness of the peripheral configuration of the torch can be reduced.
- FIG. 3 is a plan view of the welding torch 3
- FIG. 4 is a sectional view taken along line IV-IV in FIG. 3
- FIG. 5 is a sectional view taken along line VV in FIG. 4, and
- FIG. It is sectional drawing along a VI line.
- the welding torch 3 includes a non-consumable electrode 5, an electrode holder 7, and a torch body 4.
- the axial direction of the non-consumable electrode 5 is parallel to the radial direction of the tube 10.
- the non-consumable electrode 5 is held by the electrode holder 7, and the electrode holder 7 is inserted into a sleeve 44 formed in the torch body 4.
- the axial direction of the non-consumable electrode 5 is the upward (U) downward (D) direction (the tip side is downward, the opposite side is upward), and the axis of the tube 10 A direction may be referred to as a front (F) rear (B) direction, and a direction orthogonal to these two directions may be referred to as a left (L) right (R) direction.
- the electrode holder 7 includes a hexagonal plate-shaped head portion 71 that is orthogonal to the axial direction of the non-consumable electrode 5, and a holder tube portion 72 that extends downward from the head portion 71.
- the non-consumable electrode 5 is inserted into the holder cylinder portion 72 from below the holder cylinder portion 72.
- the tip of the non-consumable electrode 5 inserted into the electrode holder 7 extends from the electrode holder 7.
- a screw thread 73 is formed on the outer peripheral surface of the holder cylinder portion 72.
- a slit (not shown) for allowing a diameter reduction is formed at the tip of the holder cylinder part 72, and the holder cylinder part 72 has a function as a collet.
- the torch main body 4 integrally includes a base portion 40 that has a substantially rectangular shape when viewed from the radial direction of the tube 10 and a joint portion 48 that protrudes from the right side portion of the base portion 40 toward the right side.
- a hose (not shown) is connected to the joint portion 48, and the shield gas is supplied to the shield gas flow paths 51 and 52 formed in the base portion 40 through the hose.
- the base 40 includes a sleeve 44 that holds the electrode holder 7, a flow path forming portion 41 that forms shield gas flow paths 51 and 52 around the sleeve 44, and a tip portion that extends from the electrode holder 7 of the non-consumable electrode 5.
- a nozzle 42 that forms a shield gas guide space 53 around it, and a gas lens 9 that separates the shield gas flow path 51 and the shield gas guide space 53 are integrally formed.
- the sleeve 44 extends parallel to the radial direction of the tube 10 (that is, the axial direction of the non-consumable electrode 5).
- a thread groove 46 is formed on the inner peripheral surface of the sleeve 44.
- the screw groove 46 is screwed with a screw thread 73 of the electrode holder 7 screwed into the sleeve 44.
- the distal end portion (lower end portion) of the sleeve 44 has a tapered shape that narrows downward.
- the holder cylinder portion 72 becomes the tip of the sleeve 44.
- the non-consumable electrode 5 is held in the electrode holder 7 by being pressurized in the direction of reducing the diameter.
- the flow path forming part 41 forms shield gas flow paths 51 and 52 around the sleeve 44.
- the shield gas flow paths 51 and 52 according to the present embodiment include an inner peripheral flow path 51 and an outer peripheral flow path 52.
- the inner peripheral channel 51 is an annular channel formed around the sleeve 44 and faces the gas lens 9.
- the outer peripheral channel 52 is an annular passage formed around the inner peripheral channel 51.
- the outer peripheral flow path 52 is connected to the flow path 55 of the joint portion 48 by the connection flow path 56.
- the inner circumferential channel 51 and the outer circumferential channel 52 are separated by a partition wall 47.
- the partition wall 47 is formed with a communication port 50 that allows the inner circumferential channel 51 and the outer circumferential channel 52 to communicate with each other and allows the shield gas to flow from the outer circumferential channel 52 to the inner circumferential channel 51.
- the plurality of communication ports 50 are provided in the partition wall 47 so as to be distributed in the circumferential direction, and the shield gas flows into the inside from the entire circumference of the inner circumferential flow path 51.
- Each communication port 50 is provided above the partition wall 47 and at a position closer to the ceiling of the inner peripheral flow path 51, in other words, a position further away from the gas lens 9.
- the connection flow path 56 is connected to the outer peripheral flow path 52 below the communication port 50. Therefore, the flow of the shield gas flowing from the connection flow path 56 into the outer peripheral flow path 52 contacts the partition wall 47. This prevents the shield gas from flowing directly into the inner peripheral flow path 51 through the communication port 50.
- the ceiling of the inner circumferential flow path 51 is smoothly continuous with the proximal end portion of the sleeve 44, and the boundary portion between the proximal end portion of the sleeve 44 and the ceiling of the inner circumferential flow path 51 is connected by a curved surface.
- the curved surface portion formed on the wall forming the inner peripheral flow path 51 in this way functions as a guide portion 54 that deflects the flow of the shield gas flowing from the outer peripheral flow path 52 into the inner peripheral flow path 51 toward the gas lens 9. .
- the nozzle 42 includes a circumferential lip 45 protruding downward from the flow path forming portion 41 and is provided below the flow path forming portion 41.
- the inner peripheral wall of the nozzle 42 and the partition wall 47 are continuous in the axial direction of the non-consumable electrode 5.
- the tip (lower end) of the lip 45 is located above the tip of the non-consumable electrode 5 and below the tip of the sleeve 44.
- the tip of the lip 45 is curved so as to follow the outer peripheral surface of the opposing tube 10.
- the lip 45 extends the distance from the gas lens 9 to the opening edge of the nozzle 42, that is, the length of the nozzle 42.
- the shield gas guide space 53 is formed on the inner peripheral side of the nozzle 42.
- the shield gas flowing out from the gas lens 9 is rectified so that it does not diffuse and flows in a laminar flow parallel to the extending direction of the nozzle 42, that is, the axial direction of the non-consumable electrode 5.
- the gas lens 9 rectifies the shield gas into a laminar flow and separates the inner peripheral flow path 51 and the shield gas guide space 53 from each other.
- the gas lens 9 has a hollow disk shape centered on the non-consumable electrode 5.
- the inner peripheral portion of the gas lens 9 is connected to the outer peripheral surface of the distal end portion of the sleeve 44, and the outer peripheral portion of the gas lens 9 is connected to the inner peripheral surface of the nozzle 42 (or the inner peripheral surface of the partition wall 47).
- the gas lens 9 will be described in detail later.
- the torch body 4 is made of a conductive metal and is manufactured by a metal 3D printer.
- the joint portion 48 is not necessarily formed integrally with the torch body 4 and may be joined to the torch body 4 by a welding or screwing structure.
- a metal powder as a raw material is irradiated with laser light. By irradiation with laser light, individual metal powders are melted, and the melted metal powders are fused to produce a solid structure.
- the material of the metal powder include copper and copper alloys, steel, stainless steel, aluminum, titanium, and nickel alloys.
- the shield gas introduced through the flow path 55 of the joint portion 48 first flows into the outer peripheral flow path 52 through the connection flow path 56.
- the shield gas diffused into the outer peripheral flow path 52 flows into the inner peripheral flow path 51 through the communication port 50.
- the flow of the shield gas flowing into the inner peripheral flow path 51 is directed from the communication port 50 to the sleeve 44, abuts on the guide part 54 located at the boundary between the ceiling of the inner peripheral flow path 51 and the sleeve 44, The direction is changed by being guided to the gas lens 9.
- the shield gas is rectified while passing through the gas lens 9 and flows into the shield gas guide space 53 as a laminar flow, and is ejected from the tip of the nozzle 42 toward the tube 10.
- FIG. 7 is a plan view of the gas lens 9
- FIG. 8 is a partially enlarged plan view of the gas lens 9
- FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8, and
- FIG. 10 is a perspective view of the gas lens. .
- the gas lens 9 has a lattice structure.
- the gas lens 9 is a three-dimensional mesh lattice in which elongated beams 90 and 92 are connected in a three-dimensional manner.
- the diameter ⁇ of the elongated beams 90 and 92 forming the lattice structure is about 0.2 mm at a minimum so that the metal 3D printer can be manufactured.
- mesh sheets 91 formed by connecting horizontal beams 90 in a planar shape are stacked in the axial direction of the non-consumable electrode 5 in different phases, and further stacked vertically. It has a structure in which 91 lattice points are connected by a vertical beam 92. In the gas lens 9 having such a lattice structure, regular gaps are formed by the beams 90 and 92.
- FIG. 8 shows a lattice of 4 cells in the mesh sheet 91, and shows a state in which a plurality of mesh sheets 91 are stacked in the thickness direction with different phases. Further, in FIG. 9, a three-dimensional mesh lattice in which lattice points of the mesh sheet 91 are connected by oblique vertical beams 92 is clear.
- the inner peripheral portion of the gas lens 9 connected to the distal end portion of the sleeve 44 has an extra portion of the gas lens 9 in order to resist the pressure from the electrode holder 7 screwed into the sleeve 44.
- High rigidity is required compared with the part.
- the porosity of the inner peripheral portion of the gas lens 9, particularly the joint portion with the sleeve 44 is kept at a low value (for example, 10% or less) as compared with the remaining portion of the gas lens 9.
- the porosity can be obtained from the apparent volume and the true density of the constituent material of the gas lens 9.
- the welding torch 3 of the present embodiment is characterized by including the lattice-structure gas lens 9 that rectifies the shield gas.
- the all-position welding apparatus 1 of the present embodiment is characterized by including a welding torch 3 and a rotating mechanism 2 that rotates the welding torch 3 around the tube 10.
- the gas lens 9 has a lattice structure. Since the gas lens 9 has a lattice structure, regular gaps are formed in the gas lens 9 formed using a 3D printer. Therefore, compared with the case where the gas lens 9 is a porous body, the porosity of the gas lens 9 is stabilized. Thereby, the improvement of the yield of the welding torch 3 provided with such a gas lens 9 is expected.
- the gas lens 9 has a structure in which a mesh sheet 91 formed by connecting a plurality of beams 90 in a planar shape is overlapped in the thickness direction with different phases.
- the lattice points of the laminated mesh sheets 91 are connected by vertical beams 92.
- the gas lens 9 of the welding torch 3 has a three-dimensional three-dimensional mesh lattice structure in which the horizontal beam 90 and the vertical beam 92 are joined together.
- the gas lens 9 is not limited to this. What is necessary is just to have the lattice structure which can model a regular space
- the gas lens 9 may have a structure in which a plurality of mesh sheets 91 formed by connecting a plurality of beams 90 in a planar shape are overlapped with different phases.
- the vertical beams 92 that connect the lattice points are provided between the layers of the mesh sheet 91, so that the shielding gas that passes through the gas lens 9 is not only the lattice-shaped horizontal beam 90 but also the vertical beam. It is also rectified by the beam 92.
- the same rectifying effect can be obtained.
- the number of laminated mesh sheets 91 can be reduced, and the thickness of the gas lens 9 (that is, the dimension of the non-consumable electrode 5 in the axial direction) is suppressed. be able to.
- the welding torch 3 includes a non-consumable electrode 5, an electrode holder 7 into which the non-consumable electrode 5 is inserted, a sleeve 44 that holds the electrode holder 7, and a shield gas flow path 51 around the sleeve 44. And a torch body 4 having a nozzle 42 that forms a shield gas guide space 53 around a tip portion extending from the electrode holder 7 of the non-consumable electrode 5.
- the gas lens 9 is provided so as to separate the shield gas flow path 51 and the shield gas guide space 53 of the torch body 4.
- the inner peripheral portion of the gas lens 9 is connected to the outer peripheral surface of the sleeve 44, and the outer peripheral portion of the gas lens 9 is connected to the inner peripheral surface of the nozzle 42 (or the partition wall 47). Has been.
- the gas lens 9 is formed integrally with the other elements of the torch body 4 using a metal 3D printer, the inner periphery of the gas lens 9 is supported by a rigid sleeve 44, and the gas lens 9 Since the outer peripheral portion of the gas lens 9 is supported by the nozzle 42 which is a rigid body, the gas lens 9 is stably formed.
- the gas lens 9 is formed integrally with the sleeve 44 and the nozzle 42.
- the gas lens 9, the sleeve 44, and the nozzle 42 of the torch body 4 are formed by a metal 3D printer.
- a welding torch 3 in which a solid metal part and a gas lens 9 having a higher porosity than the solid metal part and a gas lens 9 having a higher porosity are combined with one torch body 4 is manufactured at a low cost by using a modeling technique using a metal 3D printer. Can do.
- the shield gas flow paths 51 and 52 are formed around the sleeve 44 and are formed around the inner peripheral flow path 51 facing the gas lens 9 and the inner peripheral flow path 51. 51 and an outer peripheral flow path 52 separated by a partition wall 47.
- the partition wall 47 is provided with a communication port 50 that allows the shield gas to flow from the outer peripheral channel 52 to the inner peripheral channel 51.
- the shield gas flow paths 51 and 52 have an internal / external double structure of the inner peripheral flow path 51 and the outer peripheral flow path 52 provided on the outer peripheral side thereof, whereby the axial direction of the non-consumable electrode 5 of the torch body 4 is achieved. Even if the dimension (that is, the thickness) in the direction parallel to is suppressed, the shield gas can be sufficiently laminarized. As a result, the welding torch 3 can be flattened, that is, the thickness can be reduced as compared with the case where the shield gas flow path is one space.
- the guide portion 54 that deflects the flow of the shield gas flowing from the outer peripheral flow channel 52 to the inner peripheral flow channel 51 toward the gas lens 9 on the wall forming the inner peripheral flow channel 51. Is formed.
- the communication port 50 provided in the partition wall 47 between the inner peripheral flow channel 51 and the outer peripheral flow channel 52 is a hole that penetrates the partition wall 47.
- the communication port 50 may be, for example, a slit or a tapered hole (see FIG. 12) that increases in diameter toward the inner peripheral flow path 51.
- an obstacle such as a swirl blade may be provided in the communication port 50.
- the communication ports 50 provided in the partition wall 47 between the inner peripheral flow channel 51 and the outer peripheral flow channel 52 are arranged at equal intervals in the circumferential direction in the partition wall 47.
- the arrangement of the communication ports 50 is not limited to the above embodiment, and may be provided in the circumferential direction in the partition wall 47.
- 11 is a plan view of a welding torch 3A according to Modification 2.
- FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. 11.
- FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG.
- the aperture ratio of the partition wall 47 of the second part is larger than the aperture ratio of the partition wall 47 of the first part.
- the inflow portion of the shield gas in the outer peripheral flow path 52 is a connection portion between the outer peripheral flow path 52 and the connection flow path 56.
- a plurality of communication ports 50 of the same size are formed in the partition wall 47 and provided in the partition wall 47 of the first portion.
- the number of communication ports 50 provided in the second portion partition wall 47 is larger than the number of communication ports 50 provided.
- the aperture ratio of the partition wall 47 of the second portion is larger than the aperture ratio of the partition wall 47 of the first portion.
- the opening area of the communication port 50 provided in the second partition wall 47 is made larger than the opening area of the communication port 50 provided in the first partition wall 47, so that The aperture ratio of the partition wall 47 of the second portion may be made larger than the aperture ratio.
- the shielding gas that has flowed into the first portion of the outer peripheral flow path 52 by increasing the opening ratio of the partition 47 of the second portion larger than the opening ratio of the partition 47 of the first portion of the outer peripheral flow path 52.
- the shielding gas can be diffused in the outer peripheral flow path 52.
- FIG. 14 is a plan view of a welding torch 3B according to the third modification.
- a welding torch 3B according to Modification 3 includes a non-consumable electrode 5B, an electrode holder 7B, and a torch body 4.
- the non-consumable electrode 5 is held by an electrode holder 7B, and the electrode holder 7B is inserted into a sleeve 44 formed on the torch body 4.
- the non-consumable electrode 5B has an electrode shaft portion 5a and an electrode taper portion 5b that gradually decreases in diameter from the electrode shaft portion 5a toward the tip.
- the electrode holder 7 ⁇ / b> B includes a holder cylinder part 72, a holder head 71 that closes one of the end openings of the holder cylinder part 72, and a thread 73 (first screw part) formed on the outer peripheral wall of the holder cylinder part 72. And integrally.
- the length of the holder cylindrical portion 72 of the welding torch 3 according to the above-described embodiment is substantially the same as the length from the sleeve inlet 44a to the sleeve outlet 44b (see FIG. 4), but the welding according to this modification example.
- the length of the holder cylinder portion 72 of the torch 3B is shorter than the length from the sleeve inlet 44a to the sleeve outlet 44b. Therefore, the tip of the holder cylinder part 72 screwed into the sleeve 44 does not reach the sleeve outlet 44b.
- the holder cylinder portion 72 is not formed with a slit. That is, the holder cylinder part 72 according to the present modification does not have a function as a collet.
- a screw thread 73 is provided on the outer peripheral portion of the cylindrical portion 72.
- the inner diameter of the holder cylinder portion 72 is slightly larger than the outer diameter of the electrode shaft portion 5a so that the electrode shaft portion 5a can be loosely inserted.
- the outer diameter of the electrode shaft portion 5a is larger than the outer diameter of the non-consumable electrode 5 according to the above-described embodiment, and the former may be 1.5 times or more the latter.
- the sleeve 44 is larger than the minimum diameter of the sleeve inlet 44a into which the non-consumable electrode 5B and the holder cylinder part 72 are inserted, the thread groove 46 (second thread part) screwed into the thread 73, and the electrode taper part 5b. And a sleeve outlet 44b having an inner diameter smaller than the maximum diameter.
- the sleeve 44 is provided with a thread groove 46 and the electrode holder 7B is provided with a thread 73, but the sleeve 44 is provided with a thread and the electrode holder 7B is provided with a thread groove. It doesn't matter.
- the screw thread 73 of the electrode holder 7B is screwed into the screw groove 46 of the sleeve 44, thereby allowing the electrode holder 7B to move in the insertion / removal direction. That is, when the electrode holder 7B rotates relative to the sleeve 44, the electrode holder 7B can be moved in the insertion / removal direction with respect to the sleeve 44.
- the vicinity of the sleeve outlet 44b has a tapered shape that gradually decreases toward the tip.
- the taper-shaped gradient is larger than the gradient of the electrode taper portion 5b.
- the vicinity of the sleeve outlet 44b is not necessarily tapered, and for example, the end surface of the sleeve 44 on the sleeve outlet 44b side may be closed, and an opening serving as the sleeve outlet 44b may be provided there.
- the length from the sleeve inlet 44a to the sleeve outlet 44b is longer than the length of the holder cylinder 72 and shorter than the length of the non-consumable electrode 5B. Therefore, the welding torch 3B inserted into the sleeve 44 from the sleeve inlet 44a protrudes from the sleeve outlet 44b.
- the non-consumable electrode 5B is restricted from moving in the insertion direction into the sleeve 44 when the electrode taper portion 5b contacts the opening edge of the sleeve outlet 44b. Therefore, the protruding length of the non-consumable electrode 5B from the sleeve 44 can be adjusted by the length and gradient of the tapered portion 59.
- the holder tube portion 72 is inserted into the sleeve 44, the electrode shaft portion 5a is inserted into the holder tube portion 72, the electrode taper portion 55b abuts against the opening edge of the sleeve outlet 44b, and the electrode shaft portion. 5 a is in contact with the holder head 71.
- the electrode holder 7B is screwed into the sleeve 44, the non-consumable electrode 5B is pressed between the sleeve 44 and the electrode holder 7B in the axial direction. That is, the non-consumable electrode 5B is held by the torch body 4 by the axial force of the electrode holder 7B.
- the collet is omitted, but the non-consumable electrode 5B is held in a state where the relative position is fixed to the torch body 4 by the sleeve 44 and the electrode holder 7B.
- the electrode holder 7B since the electrode holder 7B does not include a collet that is a consumable part, the electrode holder 7B can be reused when the non-consumable electrode 5B is replaced.
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Abstract
Description
前記溶接トーチと、
前記溶接トーチを前記チューブの回りに回転させる回転機構とを、備えることを特徴としている。
図1及び図2に示された全姿勢溶接装置1は、チューブ10同士の突合せ溶接を自動的に行うものである。溶接方法は、例えば、TIG(Tungsten Inert Gas)溶接であってよい。
ここで、溶接トーチ3の構成を詳細に説明する。図3は溶接トーチ3の平面図、図4は図3のIV-IV線に沿った断面図、図5は図4のV-V線に沿った断面図、図6は図4のVI-VI線に沿った断面図である。
ここで、ガスレンズ9の構成について詳細に説明する。図7はガスレンズ9の平面図、図8はガスレンズ9の部分的な拡大平面図、図9は図8のIX-IX線に沿った断面図、図10はガスレンズの斜視図である。
以上に本発明の好適な実施の形態を説明したが、本発明の精神を逸脱しない範囲で、上記実施形態の具体的な構造及び/又は機能の詳細を変更したものも本発明に含まれ得る。上記の構成は、例えば、以下のように変更することができる。なお、変形例1~3の説明では、前述の実施形態と同一又は類似の部材には図面に同一の符号を付し、説明を省略する。
上記実施形態に係る溶接トーチ3において、内周流路51と外周流路52との隔壁47に設けられた連通口50は、隔壁47を貫く孔である。但し、連通口50の態様はこれに限定されない。連通口50は、例えば、スリットであったり、内周流路51へ向けて拡径するテーパ孔(図12、参照)であったりしてもよい。また、連通口50を通過するシールドガスに流動抵抗を与えるために、連通口50に旋回羽根などの障害物が設けられてもよい。
上記実施形態に係る溶接トーチ3において、内周流路51と外周流路52との隔壁47に設けられた連通口50は、隔壁47において周方向に均等な間隔で並べられている。但し、連通口50の配置は、上記実施形態に限られず、隔壁47において周方向に偏って設けられていてもよい。図11は変形例2に係る溶接トーチ3Aの平面図、図12は図11のXII-XII線に沿った断面図、図13は図12のXIII-XIII線に沿った断面図である。図11~13に示す変形例2に係る溶接トーチ3Aでは、外周流路52を、シールドガスの流入部を含む第1部分と、余の第2部分とに周方向に2分割したときに、第1部分の隔壁47の開口率よりも、第2部分の隔壁47の開口率が大きい。なお、外周流路52におけるシールドガスの流入部とは、外周流路52と接続流路56との接続部のことである。
上記実施形態に係る溶接トーチ3において、電極ホルダ7はその筒部72にコレットとしての機能を備えている。但し、以下に説明する変形例3に係る溶接トーチ3Bのように、電極ホルダ7からコレットとしての機能を省くこともできる。図14は、変形例3に係る溶接トーチ3Bの平面図である。
2 回転機構
3,3A,3B 溶接トーチ
4 トーチ本体
5,5B 非消耗電極
5a 電極軸部
5b 電極テーパ部
5t テーパ部
7,7B 電極ホルダ
71 ホルダ頭部
72 ホルダ筒部
73 ネジ山
9 ガスレンズ
10 チューブ
11 ベースプレート
12,14,16 直動機構
18 クランプ機構
20 テーブル
21 回転部材
22,23,24 従動ギア
25 駆動ギア
26 モータ
40 基部
41 流路形成部
42 ノズル
44 スリーブ
44a スリーブ入口
44b スリーブ出口
45 リップ
46 ネジ溝
47 隔壁
48 継手部
50 連通口
51 内周流路(シールドガス通路)
52 外周流路(シールドガス通路)
53 シールドガス案内空間
54 案内部
56 接続流路
90,92 梁
91 メッシュシート
Claims (11)
- シールドガスを整流するラティス構造のガスレンズを備える、溶接トーチ。
- 前記ガスレンズは、複数の梁が平面状に繋ぎ合わされて成るメッシュシートが、位相を違えて厚み方向に重ねられた構造を有する、
請求項1に記載の溶接トーチ。 - 積層された前記メッシュシートの格子点同士が縦梁で繋ぎ合わされている、
請求項2に記載の溶接トーチ。 - 非消耗電極と、
前記非消耗電極を保持する電極ホルダと、
前記電極ホルダが挿入されるスリーブ、前記スリーブの周囲にシールドガス流路を形成する流路形成部、及び、前記非消耗電極の前記電極ホルダから延出した先端部の周囲にシールドガス案内空間を形成するノズルを有するトーチ本体とを、備え
前記ガスレンズが、前記トーチ本体の前記シールドガス流路と前記シールドガス案内空間とを隔てるように設けられている、
請求項1~3のいずれか一項に記載の溶接トーチ。 - 前記ガスレンズの内周部が前記スリーブの外周面と接続され、前記ガスレンズの外周部が前記ノズルの内周面と接続されている、
請求項4に記載の溶接トーチ。 - 前記ガスレンズが、前記スリーブ及び前記ノズルと一体的に形成されている、
請求項4又は5に記載の溶接トーチ。 - 前記シールドガス流路が、前記スリーブの周囲に形成され、前記ガスレンズに臨む内周流路と、前記内周流路の周囲に形成され、前記内周流路と隔壁により隔たれた外周流路とを含み、
前記隔壁に、前記外周流路から前記内周流路へのシールドガスの流入を許容する連通口が設けられている、
請求項4~6のいずれか一項に記載の溶接トーチ。 - 前記外周流路を、シールドガスの流入部を含む第1部分と、余の第2部分とに周方向に2分割したときに、前記第1部分の前記隔壁の開口率よりも、前記第2部分の前記隔壁の開口率が大きい、
請求項7に記載の溶接トーチ。 - 前記内周流路を形成している壁に、前記外周流路から前記内周流路へ流入したシールドガスの流れを前記ガスレンズへ向けて偏向させる案内部が形成されている、
請求項7又は8に記載の溶接トーチ。 - 前記非消耗電極は、電極軸部と、前記電極軸部から先端に向かって漸次縮径する電極テーパ部とを有し、
前記電極ホルダは、スリ割りの無いホルダ筒部と、前記ホルダ筒部の外周壁に形成された第1ネジ部と、前記ホルダ筒部の端部開口の一方を閉塞するホルダ頭部とを有し
前記スリーブは、前記非消耗電極及び前記ホルダ筒部が挿入されるスリーブ入口と、前記第1ネジ部と螺合して前記電極ホルダの挿脱方向の移動を許容する第2ネジ部と、前記電極テーパ部の最小径よりも大きく且つ最大径よりも小さい内径のスリーブ出口とを有し、
前記スリーブに前記ホルダ筒部が挿入され、当該ホルダ筒部に前記電極軸部が挿入され、前記電極テーパ部が前記スリーブ出口の開口縁に当接し、前記電極軸部が前記ホルダ頭部に当接する、
請求項4に記載の溶接トーチ。 - チューブ同士の突合せ溶接を行う全姿勢溶接装置であって、
請求項1~10のいずれか一項に記載の溶接トーチと、
前記溶接トーチを前記チューブの回りに回転させる回転機構とを、備える、
全姿勢溶接装置。
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CN201780076427.1A CN110072661A (zh) | 2016-12-14 | 2017-12-14 | 焊枪和全姿势焊接装置 |
FIEP17881150.1T FI3556504T3 (fi) | 2016-12-14 | 2017-12-14 | Hitsauspoltin ja kaikissa asennoissa käytettävä hitsauslaite |
US16/469,736 US11292073B2 (en) | 2016-12-14 | 2017-12-14 | Welding torch and all-position welding device |
EP17881150.1A EP3556504B1 (en) | 2016-12-14 | 2017-12-14 | Welding torch and all-position welding device |
KR1020197018201A KR102244677B1 (ko) | 2016-12-14 | 2017-12-14 | 용접 토치 및 전자세 용접 장치 |
JP2018556744A JP6797211B2 (ja) | 2016-12-14 | 2017-12-14 | 溶接トーチ及び全姿勢溶接装置 |
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FI3556504T3 (fi) | 2023-10-17 |
JPWO2018110657A1 (ja) | 2019-10-24 |
US11292073B2 (en) | 2022-04-05 |
EP3556504A4 (en) | 2020-09-02 |
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