JP4859745B2 - Single-side welding equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide one-side welding equipment that can reduce the number of parts upon securing strength of a backing device. <P>SOLUTION: This invention relates to the one-side welding equipment having a backing part 10 for closely sticking a backing flux W to the reverse side of a groove line M where members to be welded E are butted each other. The equipment includes: a base frame H equipped with at least two main beams H1 installed in parallel in the longitudinal direction of the groove line M and a plurality of connecting beams H2 that connect between the main beams H1 at right angles and that are installed with prescribed spaces apart in the longitudinal direction; an elevation means 2 installed on the connecting beams H2; a rack frame 3 raised/lowered by the elevation means 2; a plurality of groups of backing rollers 4 that support the backing part 10 movably in the width direction, that arrays the group of backing rollers 5 in the width direction, and that are arranged in a position corresponding to the connecting beams H2; a driving mechanism for moving the backing part 10 in the width direction; and a reinforcing member 19 that is provided in the backing part 10 along the longitudinal direction between adjacent backing rollers 4. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a single-side welding apparatus for welding a member to be welded such as a metal plate.

Conventionally, for example, the invention according to Patent Document 1 is known as a single-side welding device and a backing device provided therein. The single-sided welding apparatus according to Patent Document 1 is used, for example, when welding a groove line formed by abutting the end of a member to be welded having a side length of 20 m to 30 m.
FIG. 7 is a side sectional view showing a single-side welding apparatus according to Patent Document 1. As shown in FIG. 8 is a view showing a state in which the gantry frame is lowered, and is a cross-sectional view taken along the line DD of FIG.
A single-side welding apparatus F according to Patent Document 1 includes a plurality of rails G arranged in parallel on the installation surface at predetermined intervals in the longitudinal direction, and a rotary carriage I that moves horizontally on the rails G. The base frame H mainly includes a base frame H which is provided in the rotary carriage I and extends in the longitudinal direction and has a concave shape in cross-sectional view, and a backing device Z provided in the base frame H.

As shown in FIG. 8, the backing device Z includes a backing portion 100 extending in the longitudinal direction, a pedestal frame 101 on which the backing portion 100 is placed, and an elevating means for raising and lowering the pedestal frame 101. 102.
As shown in FIG. 8, the backing portion 100 is disposed on a flat upper surface member 101 a provided in the gantry frame 101 and below the groove line 103 formed by abutting the welded members E and E together. Is arranged. The backing portion 100 includes a pair of backing rollers 104 that roll on the upper surface member 101 a, a bottom plate 105 that pivotally supports the backing roller 104, a foundation frame 106 that is formed above the bottom plate 105, and a foundation frame 106. A pair of air hoses 107 and a copper plate 110 disposed on the air hose 107. A backing flux W is disposed on the upper portion of the copper plate 110.
As shown in FIG. 7, the pair of backing rollers 104 arranged in parallel on the same line along the moving direction are arranged in parallel in a pair of units at a predetermined interval along the longitudinal direction of the backing portion 100. ing. A drive mechanism 112 is connected to both ends of the backing portion 100. The backing part 100 is formed so as to be able to perform fine adjustment alignment for aligning the center of the groove line 103 and the copper plate 110 by moving in the width direction by the drive mechanism 112.

  The backing device Z having such a configuration performs fine adjustment of the alignment in the width direction by moving the backing portion 100 in the width direction, and places the backing portion 100 accurately under the groove line 103. Can be placed. Then, the hopper 113 is moved in the longitudinal direction to supply a powdery backing flux W onto the copper plate 110, and then air is introduced into the air hose 107 so as to expand, thereby backing the lower surface of the groove line 103. The welding operation can be performed from the front side of the groove line 103 by pressing the flux W.

Further, when a plurality of end portions of the member to be welded E are continuously transported in a temporarily fixed state, first, after the welding of one groove line 103 is finished, the gantry frame 101 is moved by the lifting means 102. A space V is formed between the member to be welded E and the copper plate 110 by lowering. Then, the hopper 113 is moved to the space V in the longitudinal direction to supply the backing flux W, and then the gantry frame 101 is raised again. Thereby, even if it is a case where the some to-be-welded member E is temporarily stopped | fastened and it conveys continuously, by raising / lowering the base frame 101 inside the base frame H by the raising / lowering means 102, welding operation | work continuously It can be performed.
JP 2006-51529 A (FIG. 4 etc.)

Here, when performing welding, in order to form a suitable bead, it is preferable that the backing flux W is in close contact with the back side of the member E to be welded. If the contact state of the backing flux W is poor, there is a high possibility that the molten metal in the welded portion will flow out between the welded member E and the backing flux W, resulting in poor welding.
Usually, the pressure applied to the air hose 107 is 0.06 to 0.1 MPa. Therefore, when the backing part 100 is lifted by the elevating means 102 and then the copper plate 110 is pressed against the welded member E by the air hose 107, a force of about 9.8 KN / m acts on the backing part 100. This stress is transmitted to the gantry frame 101 via the backing roller 104 which is a contact portion (supporting point) between the backing portion 100 and the gantry frame 101.

  The backing portion 100 has a characteristic that the longitudinal direction is very long with respect to the width direction, for example, the width is about 50 cm while the longitudinal direction is about 30 m. Therefore, in order to make the backing flux W uniformly adhere to the member E to be welded, it is preferable to arrange the backing rollers 104 at short intervals in order to avoid bending of the backing portion 100. Thereby, the backing device Z can disperse the stress acting on the backing portion 100 and transmit the stress downward.

However, if the number of the backing rollers 104 is large, there is a problem that the number of parts is increased and the equipment cost is increased.
Further, as shown in FIG. 8, the backing flux W dropped from the copper plate 110 is deposited on the upper surface member 101 a of the gantry frame 101 and adheres around the backing roller 104. When the backing flux W adheres to the periphery of the backing roller 104 as described above, when the backing portion 100 moves in the width direction due to the frictional resistance of the backing flux W, friction in the width direction is applied to all the backing rollers 104. The resistance acts as a distributed load, causing the backing part 100 to be deformed like a bow. Thereby, since the precision of the fine adjustment movement is lowered, it is necessary to remove the backing flux W around the backing roller 104 and the upper surface member 101a. For this reason, when the number of backing rollers 104 is large, the maintenance becomes complicated and the maintenance cost increases.
Then, this invention makes it a subject to provide the single side welding apparatus which can reduce the number of parts, such as a backing roller and the upper surface member of a mount frame, while ensuring the intensity | strength of a backing apparatus.

The present invention devised based on such a concept is a single-side welding apparatus provided with a backing portion that tightly attaches a backing flux to a back side of a groove line formed by abutting a member to be welded. A base frame comprising: at least two main beams provided parallel to the longitudinal direction; and a plurality of connecting beams that connect the main beams at a right angle and are provided at predetermined intervals in the longitudinal direction. When,
Elevating means installed on the connecting beam, a gantry frame that is raised and lowered by the elevating means, and supporting the backing portion so as to be movable in the width direction, and a group of backing rollers in the width direction. was set, the has a backing roller of the plurality of groups which is disposed at a position corresponding to the connecting beam, and a driving mechanism for moving the backing part in the width direction, the backing part, the longitudinal a bottom plate that extends over a copper plate or backing jig the backing flux is supplied to the lower surface of the bottom plate, provided along the longitudinal direction between the backing roller portion adjacent A reinforcing member, and an air hose for pressing the backing flux supplied to the copper plate or backing jig against the back side of the groove line, and the backing roller is formed from the upper end of the gantry frame. To the gantry frame so that a part of it protrudes While being supported, the lower surface of the bottom plate, characterized by providing so as to be supported by the backing roller.

  According to such a configuration, since the reinforcing member is disposed along the longitudinal direction on the bottom plate of the backing portion, the cross-sectional secondary moment of the backing portion can be increased. Thereby, even if it makes wide between adjacent backing roller parts, since bending of a backing part can be prevented, the number of backing rollers can be reduced. Further, when the backing portion is pushed up, the lifting means is disposed below the backing roller portion that receives the load acting on the backing portion, so that the load can be directly transmitted downward. Thereby, since it can reduce that a big bending stress acts on a mount frame, the intensity | strength of a mount frame can be set small, and thickness reduction and weight reduction of a member can be achieved.

Further , according to this configuration, the backing roller contacts from the lower surface side of the bottom plate, so that the backing flux does not accumulate between the backing roller and the bottom plate. Accordingly, it is possible to prevent the backing flux from adhering to the periphery of the backing roller, so that the positioning of the backing portion in the width direction can be accurately performed.

Engaging Ru-sided welding apparatus of the present invention, while ensuring the strength of the backing device, it is possible to reduce the number of parts.

[First embodiment]
Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall perspective view showing a single-side welding apparatus including a backing apparatus according to the first embodiment. FIG. 2 is an enlarged perspective view taken along line AA of FIG. 1 showing the single-side welding apparatus according to the first embodiment. FIG. 3 is an enlarged perspective view of line B-B in FIG. 1 showing the backing device according to the first embodiment. FIG. 4 is a partially broken cross-sectional view taken along the line BB of FIG. 1 showing the single-side welding apparatus according to the first embodiment. FIGS. 5A and 5B are diagrams showing the single-side welding apparatus according to the first embodiment, in which FIG. 5A is a plan view and FIG. 5B is a side view taken along the line CC of FIG.
In the description of the embodiment, the longitudinal direction and the width direction follow the directions of the arrows shown in FIG.

As shown in FIG. 1, the backing device 1 according to the first embodiment, for example, performs single-sided submerged arc welding by butting the ends of welded members each having a length of 20 m to 30 m. Installed in device F.
The single-sided welding device F includes a plurality of rails G arranged in parallel in the longitudinal direction of the single-sided welding device F, a base frame H disposed above the rails G, and the rail G and the base frame H. It has a rotating carriage I that is interposed therebetween and is formed so as to be movable in the width direction on the rail G, and a backing device 1 installed inside the foundation frame H. Moreover, the single-sided welding apparatus F has a backing flux hopper F1 formed so as to be able to travel in the longitudinal direction of the backing apparatus 1. Furthermore, the single-sided welding device F has a welding machine J that is movable along the longitudinal direction of the backing device 1 above the backing device 1. The welding machine J is formed so as to be movable in a guide extending along the longitudinal direction of the backing device 1, and includes a welding wire, a front flux hopper, a wire feeder, a current / voltage / speed control device, and the like. Is provided.

  As shown in FIGS. 1 and 4, for example, the single-side welding device F supports a member to be welded E guided by the panel moving roller K and the auxiliary roller L along the width direction of the single-side welding device F. After that, the backing flux W is pressed against the back side of the groove line M of the welded member E by the backing device 1, and the single-sided submerged arc welding is performed by the welding machine J from the front side of the welded member E. Is.

  As shown in FIGS. 1 and 4, the rotating carriage unit I includes two rotating bodies i arranged at a predetermined interval and two plate members arranged apart from each other in the longitudinal direction. The rotating body i is pivotally supported by a plate material and is formed so as to roll on a rail G made of steel and move in the width direction. A base frame H is abutted and supported on the upper part of the rotating carriage I.

As shown in FIGS. 1 and 4, the base frame H is formed so as to exhibit a concave shape in cross section through a steel square frame, and the upper side is open. The base frame H includes two main beams H ₁ arranged in parallel along the longitudinal direction, a connection beam H ₂ connected at a right angle between the main beams H ₁ and H ₁ , and a perpendicular to the connection beam H ₂ . H ₃ installed upright and auxiliary beams H ₄ and H ₄ installed in parallel above the main beams H ₁ and H ₁ , respectively, and the opposite side of the backing device 1 from the auxiliary beams H ₄ and H ₄ and a cantilever H ₅ was projecting toward the. The auxiliary beam H ₄ is provided with a panel moving roller K and a magnet device N, and the cantilever beam H ₅ is provided with an auxiliary roller L.
Inside the base frame H, a backing device 1 described in detail below is arranged.

As shown in FIGS. 1 and 2, the backing device 1 is a device that accurately presses the backing flux against the back side of the groove line M formed by abutting the welded members E and E. Backing device 1, a plurality of the lifting means 2 which are arranged at predetermined intervals on the upper connecting beams H _2, which is extended in the longitudinal direction of the one-side welding apparatus F, the foundation frame H A gantry frame 3 that moves up and down relative to the gantry frame, a backing roller portion 4 that is arranged on the upper portion of the gantry frame 3 at a predetermined interval, and a bottom plate 11 that is supported above the backing roller portion 4 are provided. A backing member 10, a reinforcing member 19 disposed on the lower surface of the bottom plate 11 of the backing member 10, and a drive mechanism 20 that finely moves the backing member 10 in the width direction.

As shown in FIG. 2, the elevating means 2 is means for elevating the gantry frame 3 relative to the base frame H. In the first embodiment, the elevating means 2 uses, for example, a known cylinder. As shown in FIG. 2 and FIG. 5 (b), the lifting / lowering means 2 is arranged as a set with a predetermined interval in the longitudinal direction of the backing device 1. Lifting means 2, a lower end connecting bars H _2, is in contact with the upper end holding plates 3c, to 3c.

  As shown in FIGS. 2 and 4, the gantry frame 3 is a frame that moves up and down in the vertical direction. The gantry frame 3 is formed in a substantially box shape by joining a square member and a plate member, and includes a lower frame 3a extending in the width direction, and side frames 3b formed in a ladder shape at both ends of the lower frame 3a, 3b and a pair of sandwiching plates 3c, 3c interposed between the side frames 3b, 3b. The pair of sandwiching plates 3c, 3c are spaced apart at a predetermined interval in the longitudinal direction, and the upper end of the elevating means 2 is abutted and supported at the lower end. Further, a plurality of the pair of sandwiching plates 3 c and 3 c are arranged in parallel at a predetermined interval along the longitudinal direction of the backing device 1.

  Through holes Q, Q are formed in the lower frame 3a, and the elevating means 2 is inserted therethrough. The sandwiching plates 3c and 3c are juxtaposed at a predetermined interval, and both ends are in contact with the side frames 3b and 3b.

  As shown in FIGS. 2 and 4, the backing roller portion 4 is a member that supports the backing portion 10 having the bottom plate 11 so as to be movable in the width direction. The backing roller portion 4 is formed of a plurality of backing rollers 5, 5... And rotating shafts 6, 6. The backing roller 5 is a cylindrical body having the same shape, and is formed so as to be rotatable about a rotation shaft 6 penetrating through a circle. The backing roller 5 is pivotally supported on the clamping plate 3c so that a part of the backing roller 5 protrudes from the upper end of the clamping plate 3c. The backing rollers 5 are arranged in a straight line across the width direction at a predetermined interval, and the upper surfaces of the respective cylindrical surfaces related to the backing roller 5 are formed flush with each other. The width of the backing roller 5 (the length of the cylindrical bus bar) is smaller than the width between the sandwiching plates 3c and 3c. That is, the backing roller 5 is pivotally supported with a gap between the backing roller 5 and the clamping plate 3c.

Further, as shown in FIG. 5B, the backing roller portion 4 is formed in a plurality of groups at predetermined intervals along the longitudinal direction of the backing device 1. In the first embodiment, the elevating means 2 is disposed directly below each backing roller portion 4.
The shape of the backing roller 5 is not limited to a cylindrical body, and may be a sphere, for example. Further, the number and size of the backing rollers 5 and the interval between the adjacent backing rollers 5 may be appropriately set according to the size of the backing device 1 and the like.

  2 and 4, the backing portion 10 is a portion that is supported by the backing roller portion 4 and presses the backing flux W against the back side of the groove line M. The backing portion 10 includes a bottom plate 11 that is in contact with and supported by the backing roller portion 4, a base frame 12 formed on the top of the bottom plate 11, an air hose 13 provided in the base frame 12, and an upper portion of the air hose 13. The copper plate 14 is mainly formed.

  The bottom plate 11 is a plate-like long member, extends over the longitudinal direction of the single-side welding apparatus F, and has a lower surface in contact with the backing roller portion 4. The width of the bottom plate 11 is formed smaller than the width of the backing roller portion 4. The base frame 12 is formed in the upper part of the bottom plate 11, is formed over the longitudinal direction of the bottom plate 11, and the air hose 13 is provided in the longitudinal direction. The copper plate 14 is a plate-like member formed over the longitudinal direction in the upper part of the backing part 10, and the backing flux W is supplied to the upper surface.

  As shown in FIG. 3, the reinforcing member 19 is a member that reinforces the bottom plate 11 of the backing portion 10. The reinforcing member 19 is disposed on the lower surface of the bottom plate 11 of the backing portion 10 and is fastened by a fastener (not shown). As shown in FIG. 5, the reinforcing member 19 extends in the longitudinal direction and is disposed between the adjacent backing roller portions 4 and 4. Since the reinforcing member 19 can increase the moment of inertia of the cross section of the bottom plate 11, the bottom plate 11 can be prevented from bending downward. In addition, although the reinforcement member 19 uses a square steel pipe in 1st embodiment, it does not limit a raw material and a shape.

  As shown in FIG. 2, the drive mechanism 20 is a mechanism that moves the backing portion 10 in the width direction. The drive mechanism 20 is attached to the side frame 3b, and includes a drive unit 20a provided with a motor (not shown), a screw shaft 20b directly connected to the drive unit 20a, a screw shaft 20b, and an engagement of the backing unit 10. And an engaging portion 20c joined to the bottom plate 11. Thereby, the backing part 10 moves on the backing roller part 4 in the width direction by driving the motor. As shown in FIG. 5, the drive mechanism 20 is installed at one end at each end of the backing device 1 in the first embodiment.

Further, as shown in FIG. 4, the backing device 1 is formed with a flux recovery portion P. The flux recovery part P is formed in a taper shape whose upper part is expanded inside the gantry frame 3, and includes a conveyor part Pa for discharging the falling backing flux W to the outside, and a drive source Pb for driving the conveyor part Pa. It consists of. Thus, since the flux collection | recovery part P is formed, when supplying the backing flux W to the copper plate 14, or when scraping the backing flux W from the copper plate 14, the backing flux W that has fallen is collected. Can do.

Next, the operation of the backing device 1 according to the first embodiment will be described.
First, the backing flux W is supplied by moving the backing flux hopper F <b> 1 (see FIG. 1) along the copper plate 14. Then, the temporarily welded members E and E are moved by the panel moving roller K and the auxiliary roller L, and the groove line M formed by the welded members E and E is arranged above the backing device 1. . And the drive mechanism 20 is operated and the width direction of the backing part 10 is finely adjusted so that the copper plate 14 is located directly under the groove line M.

That is, the backing portion 10 moves in the width direction on the backing roller portion 4 when the drive portion 20a of the drive mechanism 20 is operated. That is, the backing roller 5 is formed so as to be rotatable in the width direction about the rotation shaft 6 and the lower surface of the bottom plate 11 of the backing portion 10 is in contact with the upper end of the backing roller 5. The part 10 moves in the width direction.
At this time, according to the backing device 1, the backing roller portion 4 is in contact with the bottom surface of the bottom plate 11 of the backing portion 10, so that the contact surface between the bottom surface of the bottom plate 11 and the backing roller 5 is backed. The flux W is not deposited. That is, when the backing portion 10 is moved in the width direction, the backing roller 5 is not subjected to frictional resistance due to adhesion of the backing flux W, so that the positioning of the backing portion 10 is suitably and accurately performed. It can be carried out.

  The width of the bottom plate 11 is smaller than the width of the backing roller portion 4, and the backing roller 5 is pivotally supported by a pair of sandwiching plates 3c and adjacent backing rollers 5 in the width direction. Are arranged in a line at a predetermined interval. Thereby, the backing flux W falling from above passes through between the backing rollers 5 and 5 and between the pair of sandwiching plates 3c and 3c separated in the longitudinal direction and falls. Therefore, since the backing flux W does not accumulate on the backing roller portion 4 and does not hinder the rotation of the backing roller 5, the positioning can be performed by suitably rotating the backing roller 5. Further, the falling backing flux W can be efficiently recovered by the flux recovery part P (see FIG. 4).

  When fine adjustment in the width direction is completed, air is introduced into the air hose 13 and the backing flux W supplied to the copper plate 14 is pressed against the back side of the groove line M. At this time, the magnet device N is activated, and the member to be welded E that is biased so as to be pushed upward is attracted downward and fixed by magnetism. And the to-be-welded member E is welded by performing the single-sided submerged arc welding by the welding machine J from the front side of the groove line M.

Here, when the backing portion 10 is pressed against the member E to be welded, a stress of 0.06 MPa to 0.1 MPa acts on the backing portion 10. The backing portion 10 has a very long length in the longitudinal direction (about 30 m in the first embodiment) compared to the length in the width direction (about 40 cm in the first embodiment). When the abutment portion 10 is pushed up, stress acts downward on the bottom plate 11 of the abutment portion 10.
However, since the reinforcing member 19 is disposed along the longitudinal direction on the lower surface of the bottom plate 11 of the backing portion 10 according to the first embodiment, the cross-sectional secondary moment of the bottom plate 11 can be increased. Thereby, since the bending which acts on the backing part 10 can be prevented, the backing flux W can be uniformly adhered to the back surface of the groove line M.

  Further, since the strength of the backing portion 10 is secured by the reinforcing member 19, it is not necessary to provide a large number of backing roller portions 4 (support points) to prevent bending when the backing portion 10 is pushed up. That is, since the number of backing roller portions 4 that transmit stress downward can be reduced, the installation cost and the maintenance cost of the backing roller portion 4 can be reduced.

  Further, according to the backing device 1 according to the first embodiment, as shown in FIG. 5 (b), the elevating means 2 is installed immediately below the respective backing roller portions 4, 4,. The load applied to each backing roller 5 acting by pushing up the backing portion 10 is directly transmitted to the lifting means 2. Thereby, since the load acting on the gantry frame 3 can be effectively transmitted to the lifting means 2, the strength of the gantry frame 3 can be set small, and the gantry frame 3 can be made thinner and lighter. Can do.

As shown in FIGS. 4 and 5, the lifting means 2 supports the gantry frame 3 and is installed on the connecting beam H ₂ , but not only supports the weight of the backing device 1, It is necessary to withstand a load that acts when the part 10 is pressed against the member E to be welded. Therefore, depending on the arrangement position of the lifting and lowering means 2, a large bending stress acts on the base frame H, so that it is necessary to increase the strength of the base frame H itself.
In this respect, according to the single-sided welding apparatus F, since the rotary carriage part I is disposed immediately below the lifting means 2, the load is directly transmitted to the rotary carriage part I. Thereby, since the load transmitted to the elevating means 2 can be effectively transmitted to the rotary carriage I, the strength of the base frame H can be set small, and the base frame H can be made thinner and lighter. Can be planned.

[Second Embodiment]
Next, a second embodiment according to the present invention will be described. FIG. 6 is a cross-sectional view showing a backing device according to the second embodiment. The backing device 1 ′ according to the second embodiment is different from the first embodiment in that the backing portion 50 includes a hook-shaped backing jig.
That is, the backing portion 50 according to the second embodiment includes a bottom plate 11, a base frame 12 formed on the top of the bottom plate 11, a bowl-shaped backing jig 51 formed on the top of the base frame 12, It has a flux container 52 and an air hose 13 installed inside a backing jig 51, and a reinforcing member 19 disposed on the lower surface of the bottom plate 11. As described above, in the backing device 1 ′, the backing portion 50 including the backing jig 51 may be employed instead of the copper plate 10. According to this structure, even when the member to be welded E is relatively thin and there is a mistake, welding can be suitably performed.

  As mentioned above, although embodiment which concerns on this invention was described, it is not limited to an above-described form, In the range which does not deviate from the meaning of this invention, it can change suitably.

  In the first embodiment, the rotating carriage I including the rotating body i that rolls on the rail G is installed below the base frame H, but the rotating body i is not necessarily provided. Instead of the rotating carriage I, for example, a support base (not shown) made of square bar or steel mold may be used. In other words, a plurality of support bases are disposed below the elevating means 2 at a predetermined interval, so that the base frame H can be supported.

As shown in FIG. 2, in the first embodiment, the upper end of the elevating means 2 is abutted and supported by the lower part of the sandwiching plate 3 c, but is not limited to this. For example, a backing roller You may abut on and support the lower frame 3a of the gantry frame 3 below the portion 4. The lower end of the lifting means 2, in the first embodiment, but is supported by the connecting beam H _2, it may be supported on the rotary truck I. Further, the elevating means 2 is not necessarily provided directly under the backing roller portion 4 but may be provided in the vicinity of the backing roller portion 4 via a bracket or the like. At that time, the lower end of the lifting means 2, may be fixed through a known fitting to the side of connecting beam H _2.

  Moreover, although this embodiment demonstrated the form which the lower surface of the baseplate 11 of the backing part 10 and the backing roller part 4 contact | abut in the form of the backing device 1, it is not limited to this. For example, the backing device 1 may be provided with a reinforcing member (not shown) along the longitudinal direction of the lower surface or the upper surface of the bottom plate 105 shown in FIG. Even if comprised in this way, the effect similar to 1st embodiment can be acquired. In this case, in addition to the reduction in the number of parts of the backing roller unit 4, the number of parts of the upper surface member 101a of the gantry frame 101 that supports the backing roller 4 can also be reduced (upper surface member 101a in FIG. 8). reference).

It is the whole perspective view showing the single side welding device provided with the backing device concerning a first embodiment. It is the AA line expansion perspective view of FIG. 1 which showed the single-sided welding apparatus which concerns on 1st embodiment. It is the BB expanded perspective view of FIG. 1 which showed the backing device which concerns on 1st embodiment. It is a partially broken sectional view of the BB line of Drawing 1 showing the single side welding device concerning a first embodiment. It is the figure which showed the single-sided welding apparatus which concerns on 1st embodiment, Comprising: (a) is a top view, (b) is the CC line | wire side view of (a). It is sectional drawing which showed the single-sided welding apparatus which concerns on 2nd embodiment. It is the sectional side view which showed the conventional single-sided welding apparatus. It is the figure which showed the state which the mount frame which concerns on the conventional single-sided welding apparatus fell, Comprising: It is the sectional view on the AA line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Backing apparatus 2 Lifting means 3 Base frame 3c Clamping plate 4 Backing roller part 5 Backing roller 10 Backing part 11 Bottom plate 19 Reinforcement member 20 Drive mechanism E Welded member F Single-side welding apparatus M Groove line W Backing flux (flux)
H Base frame I Rotating carriage part i Rotating body

Claims (1)

It is a single-sided welding device provided with a backing part that tightly attaches a backing flux to the back side of a groove line formed by abutting a member to be welded,
At least two main beams arranged parallel to the longitudinal direction of the open top line, the main beam together connected at a right angle, a plurality of connecting beams which are provided at predetermined intervals in the longitudinal direction, A foundation frame with
Elevating means installed on the connecting beam;
A gantry frame that is raised and lowered by the elevating means;
Supporting the backing portion so as to be movable in the width direction, arranging a group of backing rollers in the width direction, and a plurality of groups of backing roller portions disposed at positions corresponding to the connecting beams;
A drive mechanism for moving the backing portion in the width direction,
The backing part is
A bottom plate that extends across the longitudinal direction, and the copper plate or backing jig the backing flux is supplied to the lower surface of the bottom plate, along said longitudinal direction between said backing roller portion adjacent A reinforcing member provided, and an air hose for pressing the backing flux supplied to the copper plate or backing jig against the back side of the groove line,
The backing roller is pivotally supported by the gantry frame so that a part thereof protrudes from the upper end of the gantry frame,
A single-side welding apparatus, wherein a bottom surface of the bottom plate is provided to be supported by the backing roller.

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