JP5181268B2 - Back wave welding equipment - Google Patents

Description

The present invention relates to a reverse wave welding apparatus provided with a welding backing apparatus used during welding .

  As a technique related to welding, for example, Patent Document 1 discloses a reverse wave welding method in which a copper backing member having a groove for storing an argon gas is provided on the back side of a groove portion of an object to be welded in welding. Describes a backside welding method in which a cover is disposed on the back side of the groove and a supply pipe is provided on the cover to supply backshield gas to prevent backside bead oxidation.

  In Patent Document 2, a recessed space is formed along the groove direction on the back surface side of the base material, a tubular body having a plurality of holes is extended and disposed in the recessed space, and the space between the tubular body and the base material is located. A butt welding method is disclosed, in which an inert gas is ejected from the plurality of holes in a fixed state, and back wave welding is performed while the recessed space is filled with the inert gas.

  Furthermore, in Patent Document 3, when performing reverse wave welding of a butt weld, a welding apparatus for performing welding and an injection apparatus for injecting fluid to a welding base material at a welding position are operated synchronously. Such a welding tool is disclosed.

JP-A-8-206830 JP-A-10-291069 JP 2000-263230 A

  However, in patent document 1, the copper backing metal matched with the groove part is required, and its installation and alignment are difficult, and the backing cover of the prior art ejects gas from the opening substantially uniformly. The back shield gas (inert gas) was not economical.

  In Patent Document 2, a recessed space is formed along the groove direction on the back surface side of the base material, a tubular body having a plurality of holes is extended and disposed in the recessed space, and the space between the tubular body and the base material is located. Since the inert gas is ejected from the plurality of holes in a fixed state, there is a disadvantage that the backing device itself used for welding becomes large.

  Furthermore, in patent document 3, the injection area of the fluid of an injection apparatus is small, and there existed a case where alignment with a welding apparatus and an injection apparatus (backing apparatus) was difficult. Moreover, there is no description about an inert gas about a fluid. Furthermore, the fluid is sprayed on the back surface of the welding base material. For this reason, the inert gas was not sprayed from the back side to the welding part comprised by the board | plate material which faced | matched.

The present invention has been made in view of the above problems, and the object of the present invention is not to make the apparatus itself large, but the inert gas can be used economically by injecting the gas from the opening substantially uniformly, and the welding site and It is an object of the present invention to provide a reverse wave welding apparatus provided with a welding backing apparatus that facilitates the positioning of the welding.

The reverse wave welding apparatus 1 of the present invention is a welding backing apparatus 10 that injects an inert gas from the back side to the welded portions of the plate members 3 and 4 that are abutted , and a box having an opening 12 that is larger than the welded portion. Box main body 11, an inert gas supply unit 13 for supplying an inert gas into the box main body 11, and an inert gas supplied into the box main body 11 by the inert gas supply unit 13. for substantially uniformly ejected from the opening 12 to distribute the gas, as well as organic and dispersion structure 15 provided on the box-shaped body 11, contact with the the back surface of the butt plate materials 3, 4 A seal member 16 provided on the outer periphery of the opening 12 for sealing so as to prevent inert gas from leaking, and a pressing portion 17 for pressing the box-shaped main body 11 against the plate members 3 and 4 butt against each other by a restoring force of a spring; Box-shaped book 11 and welding backing apparatus 10 and a mobile auxiliary member 19 which helps to move allows rolling contact spherical member 19b along the plate material 3, 4 butt the can, the abutted plate 3,4 A welding apparatus 7 for welding the welding parts of the plate, the welding backing device 10 and the welding device 7 facing each other through the welding parts, and supporting the plate members 3 on the upper side of the butted plate members 3 and 4. And a motor 8b that moves the support portion 5 by rotating a wheel 8a provided inside the support portion 5 so that the upper end edge of the plate member 3 is a rail. And a moving mechanism 8 .

According to the back wave welding device 1 of the present invention, a welding backing device 10, a welding device 7 for welding the welded portions of the butted plate members 3 and 4, the welding backing device 10 and the welding device. 7 is supported with the welded portion facing each other, and a substantially gate-shaped common support portion 5 straddling the plate material 3 on the upper side of the butted plate materials 3 and 4 and the upper edge of the plate material 3 can be rotated as a rail. And a moving mechanism 8 constituted by a motor 8b for moving the support portion 5 by rotating a wheel 8a provided inside the support portion 5, so that a welding location is provided by the welding backing device 10 and the common support portion 5. Therefore, the positioning between the welding device 7 and the welding backing device 10 is facilitated, the work can be concentrated on the welding work, the workability is improved, and the good back wave welding becomes possible.
Moreover, the welding backing device 10 provided in the back wave welding device 1 of the present invention is a welding backing device 10 that injects an inert gas from the back side to the welded portions of the plate members 3 and 4 that are abutted , and the welding. A box-shaped box body 11 having an opening 12 larger than the part; an inert gas supply section 13 for supplying an inert gas into the box-shaped body 11; and the inert gas supply section 13 to form the box. for substantially uniformly ejected from the opening 12 by dispersing the inert gas supplied to the inside of the mold body 11, as well as organic and dispersion structure 15 provided on the box-shaped body 11, the butt plate member A seal member 16 provided on an outer peripheral portion of the opening 12 that contacts the back surfaces of the plates 3 and 4 and seals so that the inert gas does not leak, and a plate member 3 and 4 that abuts the box-shaped main body 11 on the springs. Pushed by the restoring force of The box-shaped main body 11 includes the pressing portion 17 and the movement-assisting member 19 that assists the spherical member 19b in contact with the plate-shaped members 3 and 4 with which the box-shaped main body 11 is abutted to move in a rollable manner. If the gas is moved, the inert gas can be appropriately injected to the welding portion 50 (the portion to be welded by the welding apparatus) that moves during welding. For this reason, the apparatus itself does not become large. Further, the opening 12 and the dispersion structure allow the inert gas to be injected at an appropriate pressure into a region including the welded portion 50 and larger than the welded portion 50, and the injection area is increased. For this reason, even if the position of the welding part 50 which a welding apparatus welds shift | deviates, the position of the welding part 50 will respond | correspond to the opening part 12, and an inert gas is injected appropriately to a welding part, Therefore Thus, it is not necessary to strictly correspond the welding site 50 and the backing device having a small spray area, and the welding backing device 10 can be easily aligned with the welding site. Further, the inert gas can be economically used by injecting the inert gas from the opening portion substantially uniformly by the dispersion structure. As described above, the welding backing apparatus 10 does not require a large apparatus itself, can inject the gas substantially uniformly from the opening, and can use the inert gas economically, and can be easily aligned with the welding site. It becomes.
Furthermore, the welding backing device 10 provided in the back wave welding device 1 of the present invention is in contact with the back surfaces of the plate members 3 and 4 that are abutted to seal the opening 12 so that the inert gas does not leak. A pressing member 17 that presses the sealing member 16 provided on the outer peripheral portion of the plate member 3 and 4 against the plate member 3 and 4 against which the box body 11 is abutted by a restoring force of a spring, and the plate members 3 and 4 where the box body 11 is abutted against the plate member 3 and 4. By having the movement auxiliary member 19 that assists the spherical member 19b in contact with the ball member 19b and moves in a rollable manner, the box-shaped main body 11 can be prevented from being pressed and the inert gas can be prevented from leaking, and welding can be performed. The backing device 10 is smoothly moved by the movement assisting member 19 that assists the spherical member 19b in contact with the plate members 3 and 4 so as to move in a rollable manner. As a result, it is possible to efficiently inject the inert gas to the welded part while maintaining an appropriate gas pressure, so that oxidation of the welded part is prevented, and an excellent aesthetic appearance with a well-defined waveform is obtained. Can do.

  An example of an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same, corresponding, and generic items will be described with the same reference numerals. The present invention is not limited to the following embodiments. It goes without saying that the embodiments can be modified without departing from the gist of the present invention.

  FIG. 1 is a perspective view of an example of a welding backing device according to the present invention as seen from the back side. FIG. 2 is a perspective view of an example of a welding backing device according to the present invention as viewed from the front side. FIG. 3 is a schematic view of an example of the back wave welding apparatus according to the present invention. FIG. 4 is a view as seen from the cross-sectional direction of the plate material in which an example of the backside welding apparatus according to the present invention is abutted.

  The welding backing device 10 is provided in the box-shaped main body 11, a box-shaped box-shaped main body 11 having an opening 12, an inert gas supply unit 13 for supplying an inert gas into the box-shaped main body 11, and the box-shaped main body 11. And a dispersion structure 15.

  The box-shaped main body 11 has a rectangular parallelepiped shape having a cavity 11a inside and having an opening 12. However, if the box-shaped main body 11 has a cavity 11a inside and has the opening 12, an appropriate shape such as a bowl shape can be used. Shape may be sufficient.

  The opening 12 is for injecting an inert gas into the welding part 50 (the part circled in FIGS. 3 and 4), and the opening 12 is larger than the welding part 50. That is, the opening 12 has a region (area) wider than the welded part 50. The opening 12 is provided on the surface of the box-type main body 11 that faces the plate materials 3 and 4 that are abutted against each other (particularly, the surface that contacts the plate-type main body 11 and the plate materials 3 and 4 in this embodiment). . The opening 12 approaches (or comes into contact with) the plate members 3 and 4 with which the box-type main body 11 is abutted.

  The welding part 50 is a part of the groove 55 between the plate materials 3 and 4 that are abutted with each other, which the welding device 7 is to weld. Naturally, since the welding apparatus 7 welds the groove 55, the welding portion 50 moves as welding is performed. Note that the shape of the groove 55 may be X-shaped, V-shaped, I-shaped, or other various shapes depending on the thickness of the plate, the number of welding passes, the welding method, and the like.

  The inert gas supply unit 13 is attached to the box-type main body 11 and is attached to a hose 30 or the like connected to an inert gas supply device (not shown) such as a gas cylinder for supplying an inert gas. The inert gas supply unit 13 includes a pipe or the like. If the inert gas can be supplied into the box-shaped main body 11, the shape of the inert gas supply unit 13 is not limited. Examples of the inert gas include argon gas and helium gas.

  The dispersion structure 15 is for dispersing the inert gas supplied into the box-shaped main body 11 by the inert gas supply unit 13 and ejecting the inert gas from the opening 12 substantially uniformly. The dispersion structure 15 includes a first dispersion member 15a such as a pore material (for example, a wire mesh) attached to the opening 13, a wire mesh, a foam metal plate, glass wool, wire wool packed in the box-type main body 11 at a constant density. Or a second dispersion member 15b such as a combination thereof. At this time, for example, a dispersion member such as a pipe having a plurality of holes formed by extending the inert gas supply unit 13 to the inside of the box-type main body 11 may be attached, and the inert gas may be injected from the holes. The dispersion structure 15 is not particularly limited as long as the inert gas supplied into the box-type main body 11 by the inert gas supply unit 13 can be dispersed and injected from the opening 12 substantially uniformly. The dispersion structure 15 includes, for example, a dispersion member such as a pipe having a plurality of holes formed by extending the inert gas supply unit 13 to the inside of the box-shaped main body 11, and an obstacle to disperse the inert gas injected from the holes. A structure having either or both of a plate and a dispersing member such as a slit may be used. Further, one or more of the first dispersion member 15a, the second dispersion member 15b, or the dispersion member described above may be adopted as the dispersion structure 15.

  The welding backing device 10 includes a seal member 16 provided in the outer peripheral portion 11b of the opening 12 (a region outside the opening 12 on the surface having the opening 12 of the box-shaped main body 11), and the box-shaped main body 11. Are pressed against the plate materials 3 and 4 that are abutted against each other, and a movement auxiliary member 19 that assists the box-type main body 11 to move along the plate materials 3 and 4 that are abutted against each other.

  The seal member 16 is in contact with the back surfaces of the butted plate members 3 and 4 (the surface opposite to the side where the welding device 7 is located) to prevent inert gas from leaking and to maintain an appropriate gas pressure. To do. The seal member 16 is made of, for example, glass wool, heat resistant rubber or the like.

  The pressing portion 17 is configured by a spring, for example. The welding backing device 10 has an attachment portion 22. The box-type main body 11 is attached to the support portion 5 by the attachment portion 22. That is, the welding backing device 10 is supported by the support portion 5. The attachment portion 22 is configured by appropriate components such as a rod 22a, a washer 22b, and a nut 22c. One end of the rod 22a passes through the spring and is fixed to the box-type main body 11, and has a thread near the other end. The portion having this thread is passed through the hole of the attachment target portion 23 of the support portion 5 and the washer 22b. And the attachment part 22 is attached to the attachment object part 23, ie, the support part 5, and the welding backing apparatus 10 is attached to the support part 5 by attaching the nut 22c to a screw thread. By the restoring force of the spring sandwiched between the attachment target portion 23 and the box-shaped main body 11, the box-shaped main body 11 is pressed against the plate members 3 and 4 (see arrows in FIG. 3). The pressing portion 17 is not limited to the above structure, and may be any structure that presses against the plate members 3 and 4 with which the box-type main body 11 is abutted.

  The movement auxiliary member 19 is attached to, for example, the side surface of the box plate main body 11. The movement assisting member 19 has an approaching portion 19a that approaches the butted plate material 3 or 4, and a spherical member 19b is attached to the tip of the approaching portion 19a so that it can roll. The spherical member 19b is in contact with the butted plate 3 or 4. By rolling the spherical member 19b in contact, the pressed box-shaped main body 11 (the welding backing device 10) can easily move. In this manner, the movement assisting member 19 assists the movement of the box-shaped main body 11 along the plate materials 3 and 4 that are abutted. The movement assisting member 19 only needs to have a structure that assists movement along the plate members 3 and 4 with which the box-shaped main body 11 is abutted.

  The inert gas supplied by the inert gas supply device passes through the hose 30 (see the arrow in FIG. 1), and passes through the inert gas supply unit 13 communicating with the hose 30. Then, an inert gas is supplied from the inert gas supply unit 13 into the box-type main body 11. The supplied inert gas is dispersed by the dispersion structure 15 and sprayed from the openings 12 in a substantially uniform manner. Thereby, an inert gas can be injected by the appropriate pressure from the back side (the side opposite to the side with the welding apparatus 7) to the welding site | part 50. FIG. By the opening 12 and the dispersion structure 15, the inert gas can be injected substantially uniformly into a region including the welded part 50 and larger than the welded part 50, and the injection area is relatively increased. Even if the position of the welded part 50 to be welded by the welding device 7 is shifted, the position of the welded part 50 corresponds to the opening 12, and the inert gas is appropriately injected into the welded part 50. The welding device and the backing device having a small spray area do not have to correspond exactly, and the welding backing device 10 can be easily aligned with the welding device 7. Further, since the welding backing device 10 employs the box-type main body 11, if the box-type main body 11 (welding backing device 10) is moved, the welding part 50 moves during welding. Inert gas can be injected appropriately. For this reason, it is not necessary to enlarge the size of the box-type main body 11 more than necessary, and the apparatus itself does not become large. Furthermore, the inert gas can be economically used by injecting the inert gas substantially uniformly from the opening by the dispersion structure 15. As described above, the welding backing apparatus 10 does not require a large scale of the apparatus itself, and the inert gas can be used economically by injecting the inert gas from the opening 12 substantially uniformly. Since the alignment becomes easy, it is possible to obtain a back wave state excellent in aesthetics with a well-formed waveform that prevents oxidation of the welded portion 50.

  Further, the box-shaped main body is pressed by the pressing portion 17 and the sealing member 16 seals, thereby preventing the inert gas injected from the opening from leaking and maintaining an appropriate gas pressure, and The movement assisting member 19 makes the movement of the welding backing device 10 smooth.

  The back wave welding device 1 includes the welding backing device 10, the welding device 7 for welding the welding site 50, and the welding backing device 10 and the welding device 7 facing each other via the welding site 50. And a substantially gate-shaped common support portion 5 that straddles the upper plate member 3 of the plate members 3 and 4 that are supported and butted together.

  The welding apparatus 7 is a general apparatus for performing TIG welding, for example, and an electrode 7b positioned corresponding to the welding site 50 is provided on the welding torch 7a. An inert gas is injected from around the welding torch 7a.

  The back welding apparatus 1 moves along the upper plate 3 (see the broken line arrow in FIG. 3), that is, the welding backing apparatus 10 and the welding apparatus 7 supported by the common support portion 5, A moving mechanism 8 is provided for moving the support portion 5 in order to move the plate members 3 and 4 along the groove 55. The moving mechanism 8 is configured by, for example, a wheel 8a that is rotatably provided inside the support portion 5 with the upper end edge of the plate 3 as a rail, and a motor 8b that moves the support portion 5 by rotating the wheel 8a. The structure of the moving mechanism 8 is a structure in which the supporting portion 5 is moved in order to move the welding backing device 10 and the welding device 7 supported by the common supporting portion 5 along the groove 55 of the plate members 3 and 4. Other structures may be used.

  The support portion 5 is formed to be movable by such a moving mechanism 8. And since the support part 5 is a member which does not deform | transform, such as steel materials, the backing device 10 for welding and the welding apparatus 7 which this common support part 5 supports are accompanied by the movement of the common support part 5. It only moves and does not move independently of the support part 5. For this reason, the upper edge and the lower edge of the plate member 3 are parallel to each other, there is no projection or obstructive member in the middle, and the support portion 5 moves along the plate member 3, the welding back surface along the groove 55. Both the abutting device 10 and the welding device 7 can be moved. For this reason, automatic welding that is continuous over a long distance is also possible. Needless to say, the welding in the vertical direction can be performed by installing a moving mechanism that moves in the vertical direction in addition to the welding in the horizontal direction as illustrated.

  In the back wave welding device 1, since the welding backing device 10 covers the opening 12 of the welding site 50, the welding backing device 10 and the welding device 7 are easily aligned. That is, when attaching the welding backing device 10 and the welding device 7 to the back wave welding device 1, it becomes easier to support the welding device 50 through the welding site 50, so that the welding operator can concentrate on welding and the posture is stable. The burden is reduced.

  As the support portion 5 moves, the opposing welding backing device 10 and the welding device 7 move along the groove 55. The welding apparatus 10 welds the welding part 50 near the electrode 7b near the groove 55 while moving. At this time, the welding backing apparatus 10 facing the welding apparatus 10 also moves, and the welding backing apparatus 10 injects an inert gas from the back side to the welding site 50. Since the inert gas is dispersed substantially uniformly from the opening 12 and is injected at an appropriate pressure, oxidation of the welded portion 50 can be prevented, and a welded bead in an excellent aesthetic appearance and sound can be obtained.

  The welding backing device 10 and the back wave welding device 1 of the present invention are not limited to those used for TIG welding, but can be applied to other welding and have sufficient industrial applicability.

It is the perspective view which looked at an example of the backing device for welding concerning the present invention from the back side. It is the perspective view which looked at an example of the backing device for welding concerning the present invention from the front side. It is the schematic of an example of the back wave welding apparatus which concerns on this invention. It is the figure seen from the cross-sectional direction of the board | plate material which faced an example of the back wave welding apparatus which concerns on this invention.

Explanation of symbols

1 Back wave welding equipment
3 Plate material
4 Plate material
5 support parts
7 Welding equipment
7a Welding torch
7b electrode
8 Movement mechanism
8a wheel
8b motor
10 Backing device for welding
11 Box body
11a cavity
11b Outer periphery
12 opening
13 Inert gas supply section
15 Distributed structure
15a First dispersion member
15b Second dispersion member
16 Seal member
17 Pressing part
19 Movement assisting member
19a Approaching part
19b Spherical member
22 Mounting part
22a Rod
22b washer
22c nut
23 Installation target part
30 hose
50 Welded part
55 Groove

Claims (1)

A box-shaped box body 11 having a welding backing device 10 for injecting an inert gas from the back side to a welded portion of the plate members 3 and 4 that are butted and having an opening 12 larger than the welded portion , and the box An inert gas supply unit 13 that supplies an inert gas into the mold body 11, and an inert gas supplied into the box body 11 by the inert gas supply unit 13 is dispersed from the opening 12. for substantially uniformly injected, while organic and dispersion structure 15 provided on the box-shaped body 11, to seal so that the inert gas does not leak in contact with the back surface of the butt plate materials 3, 4 a seal member 16 provided on the outer peripheral portion of the opening 12, the pressing portion 17 presses by the restoring force of the spring to the box-shaped body 11 to the plate 3, 4 abutting said, the plate in which the box-shaped body 11 is butted the A welding backing apparatus 10 and a mobile auxiliary member 19 to assist in the spherical member 19b is moved to be in rolling contact along the 3,4, to weld the welding portion of the abutted plate 3,4 The welding device 7 for welding, the backing device 10 for welding, and the welding device 7 are opposed to each other via the welding portion, and are substantially gate-shaped so as to straddle the plate material 3 on the upper side of the butted plate materials 3 and 4. A common support part 5 and a moving mechanism 8 constituted by a motor 8b that moves the support part 5 by rotating a wheel 8a provided inside the support part 5 so that the upper end edge of the plate member 3 is a rail. A reverse wave welding apparatus comprising:

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