JP5039119B2 - Single-side welding equipment - Google Patents

Description

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

  Conventionally, as a single-sided welding apparatus used for single-sided welding of a member to be welded such as a metal plate, for example, one having a configuration described in Patent Document 1 is known. This single-side welding apparatus includes a pair of clamp beams 4a and 4b for clamping the steel plate 1 to be welded from above the steel plate 1 to be welded, and a traveling rail provided on the upper surface of one of the clamp beams 4a and 4b. 16, and the rail carriage 5 on which the welding unit 6 is placed performs welding while traveling on the traveling rail 16.

  This single-sided welding apparatus is capable of traveling along a welding line disposed on one of the first clamp beam 4a and the second clamp beam 4b that can be moved up and down and one of the first clamp beam 4a and the second clamp beam 4b. And a welding unit 6. Therefore, since welding can be performed while preventing deformation of the welded steel plate 1 before and during the welding process, not only the thick welded steel plate 1 but also the single-sided welding of the thin welded steel plate 1 is also used. Can be applied.

  However, in recent years, as the number of members to be welded for large ships has increased, there has been a demand for a large single-side welding apparatus that requires a beam span of several tens of meters or more. Therefore, in the welding apparatus that travels on the rail as described above, when the clamp beam becomes long, there is a problem that the influence of the deformation of the clamp beam itself and the deformation of the member to be welded cannot be avoided. Further, there is a problem that even if a slight balance is lost, it is easy to derail, and a fine meandering occurs in the welding apparatus, so that accurate welding cannot be performed.

  Therefore, conventionally, a method has been adopted in which an electromagnetic magnet is provided on a panel line which is a surface plate of a member to be welded to fix the deformation of the member to be welded. In addition, instead of providing a welding carriage on the clamp beam above the member to be welded, a method has been adopted in which the welding carriage is suspended from a beam having a beam span of 20 m or more.

Japanese Patent No. 3526152

  However, a welding carriage that travels on a rail provided on a long beam as described above fluctuates during traveling due to the influence of the deflection of the beam due to its own weight, and as a result, precise control of mm units or less is required. The problem of adversely affecting the weld occurred.

  This invention is made | formed in view of such a problem, Comprising: It aims at providing the single-sided welding apparatus in which the stable welding by the welding cart which drive | works on a welding machine beam is possible.

In order to solve the above-described problems, a single-sided welding apparatus according to the present invention includes a welding machine beam provided in a linear manner, travelable in a length direction of the welding machine beam, and on a side surface of the welding machine beam. A single-sided welding device having a welding carriage supported in a suspended state along a cantilever, and a backing device disposed on the back side of the weld line of the member to be welded, on the upper surface of the welder beam, Bearing rails and gear racks extending parallel to each other along the length direction, the welder beam is configured by joining a plurality of beam pieces in the length direction of the welder beam, the beam pieces The cross-section angle of the joint is such that the welding carriage has a convex arch shape when no load is supported while being suspended and is horizontal when the welding carriage is supported while being suspended. 90 ° Is processed fully, the welding carriage, rolling a first traveling mechanism comprising a bearing engaging said bearing rail, a pinion engaging said gear rack, the length direction while in contact with the upper surface of the gear rack A second traveling mechanism comprising a moving wheel; a welding wire supply nozzle disposed at a tip; a welding line position detection mechanism that detects a position of the welding line and generates a detection signal indicating the position; A nozzle movement control device that receives the detection signal from the welding line position detection mechanism and controls a movement direction and a movement distance of the welding wire supply nozzle according to the detection signal, the nozzle movement control device comprising: Position the welding wire supply nozzle in a direction perpendicular to the welding line in the thickness direction of the member to be welded and in a horizontal plane so that the tip of the welding wire supply nozzle is positioned above the welding line. It is set as the structure to which it moves.

In the single-side welding apparatus having such a configuration, a welding carriage suspended in a cantilever manner on a linearly provided welding machine beam moves on the welding machine beam via the first traveling mechanism and the second traveling mechanism. Then, welding is performed along the weld line of the member to be welded backed by the backing device. At that time, the welding line position detection mechanism detects the position of the welding line in advance, and the nozzle movement control device controls the moving direction and the moving distance of the welding wire supply nozzle so as to follow the detected position of the welding line. Therefore, even when the welder beam is bent downward due to the load of the welding carriage, the position of the tip of the welding wire supply nozzle can be aligned with the welding line. In the single-side welding apparatus, when the welding carriage moves on the welding machine beam, the welding machine beam is pushed down by the load, and the fluctuation of the welding carriage vertical position is reduced. Therefore, even when the load of the welding carriage is applied to the welder beam, the position of the tip of the welding wire supply nozzle can be aligned with the welding line.

  In the single-side welding apparatus according to the present invention, the second traveling mechanism includes the wheels one by one while being spaced apart at the front and rear positions along the length direction of the welder beam. It is preferable that a frame for rotatably supporting the wheel is provided between the wheels, and the frame is supported at one point by the welding cart at the center.

  The single-side welding apparatus having such a configuration supports the wheels before and after rolling on the upper surface of the gear rack with a frame, and supports the intermediate point of the frame with the welding carriage, so that the load of the welding carriage causes the frame to move. It applies evenly to the wheels at both ends of the frame. Therefore, the wheels can contact and roll without detaching from the upper surface of the gear rack, and accurate linear travelability can be obtained.

  Further, in the single-side welding apparatus according to the present invention, the welder beam is formed along a length direction of the welder beam on a side surface opposite to a side surface on which the welding carriage is suspended and supported in a cantilever state. It is preferable that the welding cart includes a fall prevention bracket that can be engaged with the protrusion.

  In the single-sided welding apparatus having such a configuration, even if the bearing or the like breaks down and the welding carriage is tilted, the overturn prevention bracket is locked by the protruding portion. Therefore, the balance of the welding carriage can be maintained and the fall can be prevented.

  In the single-side welding apparatus according to the present invention, it is preferable that the number of the fall prevention brackets is the same as the number of the bearings engaged with the bearing rail.

  In the single-sided welding device with such a configuration, the number of anti-tip brackets is the same as the number of bearings serving as the base points on which the load of the welding carriage is applied. Locked. Therefore, the balance of the welding carriage can be maintained and the fall can be prevented more effectively.

  In the single-side welding apparatus according to the present invention, the first traveling mechanism fixes the bearing to a lower end thereof, and has a through-hole formed in the length direction of the welder beam, and the through-hole. And a dustproof cover provided so as to cover the upper surface of the bearing rail.

  Since the single-sided welding device with such a structure is provided with a dustproof cover that covers the top of the bearing rail, it prevents dust and dust from entering the meshing part of the bearing rail and the bearing that engages it, and engages with it. The state can be maintained well.

  In the single-side welding apparatus according to the present invention, a cable processing device may be provided between the bearing rail and the gear rack on the upper surface of the welder beam or on the side surface of the welder beam. preferable.

  The single-sided welding apparatus having such a configuration can store the cable efficiently and safely by providing the cable processing device in an empty space of the single-sided welding apparatus.

  In the single-side welding apparatus according to the present invention, it is preferable that recesses for disposing the bearing rail and the gear rack are respectively formed on the upper surface of the welding machine beam.

  The single-sided welding apparatus having such a configuration is provided with a recess for arranging the bearing rail and the gear rack by processing the upper surface of the welding machine beam, so that welding of the processing member to the welding machine beam becomes unnecessary. The manufacturing process can be simplified and the manufacturing cost can be reduced.

  According to the single-sided welding device according to the present invention, the welding machine beam is bent downward due to the load of the welding carriage while the welding carriage supported by being suspended along the side surface of the welding machine beam is running. In addition, since the tip of the welding wire supply nozzle can be aligned with the position of the welding line, stable welding can be performed.

It is the schematic which shows the structure of the single-sided welding apparatus which concerns on embodiment, Comprising: It is a front view of the said single-sided welding apparatus. It is the schematic which shows the structure of the welder beam with which the single-sided welding apparatus which concerns on embodiment is equipped, Comprising: (a) is a side view which shows the state before joining of the several beam piece which comprises a welder beam, (b). These are side views which show the state after the joining of the several beam piece which comprises a welder beam. It is the schematic which shows the whole structure of the welding machine beam with which the single-sided welding apparatus which concerns on embodiment is equipped, Comprising: (a) is a top view of a single-sided welding apparatus, (b) is a side view of a single-sided welding apparatus. It is the schematic which shows the structure of the 1st traveling mechanism and the 2nd traveling mechanism with which the single-sided welding apparatus which concerns on embodiment is equipped, Comprising: (a) is an AA arrow line view in the right view of FIG. 1, (b). These are BB sectional drawing in the right view of FIG. It is the schematic which shows the structure of the 1st traveling mechanism and the 2nd traveling mechanism with which the single-sided welding apparatus which concerns on an Example is provided, Comprising: It is sectional drawing which shows the structure of a 1st traveling mechanism and a 2nd traveling mechanism.

Hereinafter, a single-sided welding apparatus 100 according to an embodiment will be described with reference to the drawings.
As shown in FIG. 1, the single-side welding apparatus 100 is disposed on the back side of the welding line M, a welding carriage 20 supported in a cantilever state along the side surface of the welding machine beam 10, and a welding line M. The backing device 30 is provided as a main configuration.

  As shown in FIGS. 1 and 3A, the welding machine beam 10 is a frame formed linearly to support the welding carriage 20 so as to be able to travel. The welder beam 10 is formed in a hollow square pipe shape, and is made of, for example, a metal material. The welding machine beam 10 is substantially parallel to the welding line M that abuts the member 1 to be welded, and is formed in a long shape so as to be longer than the member 1 to be welded by joining a plurality of beam pieces. Yes.

  As shown in FIGS. 1 and 3A, the bearing rail 11 and the gear rack 12 are formed on the upper surface of the welder beam 10 in parallel with each other along the length direction of the welder beam 10. The bearing rail 11 and the gear rack 12 will be described later.

Welder beam 10, FIG. 2 (a), the (b), the plurality of beams pieces (for example, the first beam piece 10a that cross angle theta ₁ of the joint is formed by machining to less than 90 °, the second Preferably, the beam pieces 10b) are joined together.

Thus, by the welder beam 10 cross-section the angle theta ₁ is formed by joining a plurality of beams piece formed is processed to less than 90 °, as shown in FIG. 3 (b), the welding carriage 20 is welded The welder beam 10 has an upwardly convex arch shape when there is no load supported by the machine beam 10, and the welder beam 10 is welded when the load is supported while the welding carriage 20 is suspended. Due to the load of the carriage 20, it is bent downward and becomes almost horizontal. Therefore, even when a long welding machine beam 10 of several tens of meters is used, welding blur can be improved and stable welding can be performed. Note that FIG. 3B is exaggerated to show the arch state of the welder beam 10.

The cross-sectional angle θ ₁ of the first beam piece 10 a and the second beam piece 10 b constituting the welder beam 10 is appropriately adjusted according to the weight of the welding carriage 20 and the length of the welder beam 10. However, the cross-sectional angle theta ₁ of the first beam piece 10a and the second beam piece 10b is too steep, if the welder beam 10 by a load of the welding carriage 20 without Kira downward push welder beam 10 does not become horizontal There, the cross-sectional angle theta ₁ is too close to 90 °, welder beam 10 too low push welder beam 10 by the load of the welding vehicle 20 may not become horizontal.

  The number of beam pieces constituting the welder beam 10 is not particularly limited, but an appropriate range is preferably 2 to 3 pieces, for example.

  As shown in FIG. 1, the welding machine beam 10 preferably has a protruding portion 13 formed on the side surface opposite to the side on which the welding carriage 20 is suspended and supported in a cantilever state. As will be described later, the protruding portion 13 is a member for enabling the fall-preventing bracket 27 to be engaged, and along the side surface of the welder beam 10 as shown in FIGS. 3 (a) and 4 (a). Are formed with a predetermined length.

  Thus, by providing the protrusion 13 on the side surface of the welder beam 10, even if the welding cart 20 is tilted to the right when the front view of FIG. The prevention bracket 27 is engaged with the protrusion 13 to prevent the welding carriage 20 from falling. Therefore, the balance of the welding cart 20 can be maintained.

  As shown in FIG. 1, the welder beam 10 is preferably provided with a cable processing device 14 between the bearing rail 11 and the gear rack 12 on the upper surface thereof. The cable processing device 14 is a device for storing various cables used in the single-sided welding device 100, and is formed along the upper surface of the welder beam 10 as shown in FIG. As described above, by providing the cable processing device 14 between the bearing rail 11 and the gear rack 12, various cables used in the single-side welding device 100 can be stored efficiently and safely. Although not shown, the cable processing device 14 may be provided on the side surface of the welder beam 10.

  As shown in FIGS. 3A and 5, the welder beam 10 has recesses 11 a and 12 a for arranging the bearing rail 11 and the gear rack 12 on the upper surface thereof in the length direction of the welder beam 10. It is preferable to form each along. In this manner, by forming the recesses 11a and 12a on the upper surface of the welder beam 10, it is not necessary to weld the processing member to the welder beam 10, the manufacturing process can be simplified, and the manufacturing cost can be reduced. Can be reduced.

  Further, as described above, when the welder beam 10 is composed of a plurality of beam pieces, the concave portions 11a and 12a are provided on the upper surfaces of the beam pieces, and the bearing rail 11 and the gear rack 12 are respectively provided in the concave portions 11a and 12a. By disposing, the bondability between the beam pieces can be further improved. Further, since the bearing rail 11 and the gear rack 12 can be linearly arranged on the welder beam 10 via the recesses 11a and 12a, the welding carriage 20 can be run more smoothly.

  As shown in FIG. 1 and FIG. 3A, the bearing rail 11 is a straight line provided on the welder beam 10 in order to allow a first travel mechanism 21 described later to travel on the welder beam 10. Rail member. The gear rack 12 is a linear rack member provided on the welder beam 10 so that a second traveling mechanism 22 described later can travel on the welder beam 10. On the side surface of the gear rack 12, a tooth profile (not shown) that can be engaged with a pinion 22a (see FIG. 5) of the second traveling mechanism 22 described later is formed along the length direction of the welder beam 10. The bearing rail 11 and the gear rack 12 are joined on the welder beam 10 by welding or bolts and nuts (not shown).

  The welding carriage 20 is for welding the welded member 1 along the welding line M while traveling in the length direction of the welding machine beam 10. As shown in FIG. 1, the welding carriage 20 is supported in a cantilever state along the side surface of the welder beam 10. The welding carriage 20 is supported by a welding machine beam 10 so as to be able to travel in the length direction of the weld line M via a first traveling mechanism 21 and a second traveling mechanism 22 which will be described later.

  As shown in FIG. 1, the welding carriage 20 includes a head frame 20 a which is a vertical base material extending substantially perpendicular to the member to be welded 1, and a horizontal base material extending substantially horizontally with respect to the member to be welded 1. A cart body 20b is provided. The head frame 20a and the carriage body 20b are preferably made of a metal material in order to have a predetermined rigidity.

  The head frame 20a includes a first traveling mechanism 21 and a second traveling mechanism 22 for traveling on the welder beam 10, and a welding wire supply nozzle 23 and a weld line position detecting mechanism 24 disposed at the tip. ing. Further, the carriage main body 20 b includes a nozzle movement control device 25 that controls the movement of the welding wire supply nozzle 23, and a flux circulator 26 for supplying flux to the member 1 to be welded.

  As shown in FIG. 1, the first traveling mechanism 21 is a member disposed so as to be suspended from the carriage main body 20 b, so that the welding carriage 20 can travel in the length direction on the welder beam 10. It is a member. As shown in FIG. 5, the first traveling mechanism 21 includes a bearing 21 a. When the bearing 21 a engages with the bearing rail 11, the welding carriage 20 travels on the welder beam 10 in the length direction. It becomes possible.

  As shown in FIGS. 4 and 5, the first traveling mechanism 21 fixes the bearing 21 a to the lower end thereof, and has a bracket 21 b having a through hole 21 c formed in the length direction of the welding machine beam 10, A dust-proof cover 21d that is inserted through the hole 21c so as to cover the upper surface of the bearing rail 11, and a flange 21e that is provided at the upper end of the bracket 21b and connects the bracket 21b and the carriage body 20b. Is preferred.

  In general, fine dust, dust and the like are likely to accumulate on the bearing rail 11 disposed at a position near the ceiling where maintenance is difficult. Therefore, the bearing 21a of the welding carriage 20 deteriorates due to the influence of the dust and the like, and as a result, the welded portion that requires precise control of mm units or less may be adversely affected. It is damaged and the welding cart 20 cannot run. However, as described above, by providing the dust-proof cover 21d so as to cover the upper portion of the bearing rail 11, entry of dust, dust and the like into the meshing portion of the bearing rail 11 and the bearing 21a engaged therewith is prevented. And stable welding can be performed.

  As shown in FIG. 1, the second traveling mechanism 22 is a member disposed so as to be suspended from the carriage main body 20 b, and along with the first traveling mechanism 21, a welding carriage in the length direction on the welder beam 10. It is a member for enabling 20 to run. As shown in FIG. 5, the second traveling mechanism 22 includes a pinion 22 a that engages with the gear rack 12, a wheel 22 b that rolls in the length direction while contacting the upper surface of the gear rack 12, and the wheel 22 b that rotates. A bracket 22c that can be supported and a flange 22d that fixes the bracket 22c to the cart body 20b are provided. In addition, a motor (not shown) for rotationally driving the pinion 22a is provided above the pinion 22a, and the welding cart 20 including the second traveling mechanism 22 and the first traveling mechanism 21 is driven by the motor. Travel in the length direction of the welder beam 10.

  As shown in FIG. 4B, the second traveling mechanism 22 includes wheels 22 b and 22 b that are spaced apart at the front and rear positions along the length direction of the welder beam 10, and the front and rear wheels. Preferably, a frame 22e that rotatably supports the wheels 22b and 22b is provided between 22b and 22b. The frame 22e is a long plate-like member made of, for example, a metal material, and supports the wheels 22b and 22b so as to be rotatable at both ends thereof.

  Further, as shown in FIG. 4B, the center portion of the frame 22 e in the length direction and the height direction is locked to the bottom surface of the carriage main body 20 b by a locking member 28. That is, the frame 22e is supported at one point on the cart body 20b via the locking member 28. As described above, the frame 22e is locked to the carriage main body 20b at one point, so that the load of the welding carriage 20 is evenly applied to the wheels 22b at both ends of the frame 22e through the frame 22e. Therefore, the wheels 22b roll in contact with each other without detaching from the upper surface of the gear rack 12, and accurate linear travelability can be obtained.

  As shown in FIG. 1, the welding wire supply nozzle 23 is a nozzle disposed at the tip of the welding carriage 20 and supplies the welding wire W to the member 1 to be welded. The welding wire supply nozzle 23 moves in the thickness direction and the width direction of the member to be welded 1 in accordance with an instruction from a nozzle movement control device 25 to be described later. Supply. Therefore, even if the welding machine beam 10 is slightly bent downward due to the load of the welding carriage 20, stable welding can be performed.

  The weld line position detection mechanism 24 is a sensor mechanism for detecting the position of the weld line M. The welding line position detection mechanism 24 moves the welding line M ahead of the welding wire supply nozzle 23 during welding, and detects position information of the welding line M. And a detection signal is produced | generated from the said positional information, and it transmits to the nozzle movement control apparatus 25 mentioned later.

  The nozzle movement control device 25 is a device that controls the moving direction and moving distance of the welding wire supply nozzle 23 at the tip of the head frame 20a in accordance with the detection signal received from the welding line position detection mechanism 24. The nozzle movement control device 25 reads the position information of the welding line M from the detection signal and covers the welding wire supply nozzle 23 so that the tip of the welding wire supply nozzle 23 is positioned above the welding line M at a predetermined height. The welding member 1 is moved in the thickness direction and the width direction. The nozzle movement control device 25 can be configured by, for example, a sequencer disposed on the carriage body 20b.

  The flux circulator 26 is a container through which the flux supplied during welding circulates. Here, on the welding wire supply nozzle 23 at the tip of the head frame 20a, a flux distribution nozzle (not shown) is arranged in parallel so as to form a pair. The flux is supplied to the flux spray nozzle through a flux supply tube (not shown) connected to the tapered bottom of the flux circulator 26. The flux remaining on the welded member 1 that has been sprayed on the welded member 1 by a flux spray nozzle (not shown) is recovered to the flux circulator 26 by a flux recovery mechanism (not shown).

  As shown in FIGS. 1 and 4A, the cart body 20b preferably includes a fall prevention bracket 27. The overturn prevention bracket 27 is a rod-shaped member made of, for example, a metal material, and prevents the welding cart 20 from overturning by engaging with the protruding portion 13 as described above. As shown in FIG. 1, the anti-tip bracket 27 is fixed to the carriage main body 20b, and the lower end of the bracket 27 is engaged with the welding machine beam through a slight gap so that it can be engaged when the lower end is inclined to the protruding portion 13. 10 is formed by being bent toward the side surface.

  As shown in FIG. 4A, it is preferable to provide the same number of fall prevention brackets 27 as the number of bearings 21 a that engage with the bearing rail 11. By making the fall prevention bracket 27 correspond to the number of the bearings 21a, the fall prevention bracket 27 is more firmly locked by the protrusion 13 when the welding carriage 20 is tilted. Therefore, the balance of the welding carriage 20 can be maintained and the fall can be prevented more effectively.

  The backing device 30 is a device that is disposed on the back side of the weld line M of the member to be welded 1 and presses the flux against the back side. The backing device 30 includes a backing portion 30a for pressing the flux from the back side of the welding line M, lifting means 30b for raising and lowering the backing portion 30a in the thickness direction of the member 1 to be welded, and a member to be welded. 1 is mounted, a panel moving roller 30c for moving the welded member 1 in the length direction, auxiliary rollers 30d and 30d, and a magnet mechanism 30e for adsorbing and fixing the welded member 1 And a beam member 30f serving as a base material for supporting these members. The beam member 30f is provided with wheels 30g and 30g that engage with a rail 40 extending in parallel with the length direction of the member 1 to be welded.

  Hereinafter, the operation of the single-side welding apparatus 100 according to the present invention will be described with reference to FIG. First, the member to be welded 1 is placed on the upper portion of the backing device 30, and the member to be welded 1 is moved in the lateral direction by the panel moving roller 30c and the auxiliary rollers 30d and 30d. Position adjustment is performed so that the portion 30a is positioned. When the position adjustment is completed, the welded member 1 is attracted and fixed by the magnet mechanism 30e.

  Next, the nozzle moving device (not shown) in the head frame 20a is moved to adjust the position so that the welding wire supply nozzle 23 and the welding line position detection mechanism 24 are positioned immediately above the welding line M. When the position adjustment is completed, the welding carriage 20 is moved in the length direction of the welding machine beam 10 and welding is performed while the welding carriage 20 is traveling along the welding line M.

  Here, during welding of the member 1 to be welded, the position of the welding line M is detected while the welding line position detection mechanism 24 moves on the welding line M prior to the supply of the welding wire W by the welding wire supply nozzle 23. In addition, the detection signal is transmitted to the nozzle movement control device 25. Then, the nozzle movement control device 25 moves the welding wire supply nozzle 23 in the thickness direction of the welded member 1 and the welding wire supply nozzle 23 so that the welding wire supply nozzle 23 is positioned on the welding line M at a predetermined height according to the detection signal. Move in the width direction. Therefore, stable welding can be performed along the weld line M even if the welder beam 10 is slightly bent downward due to the load of the welding carriage 20.

Incidentally, in addition to the above, as shown in FIG. 3 (b), a welder beam 10 was constructed arcuately sectional angle theta ₁ of the junction joining a plurality of beams pieces processed into less than 90 ° In some cases, a synergistic effect can be obtained. That is, the welding machine beam 10 has an upwardly convex arch shape when no load is applied when the welding carriage 20 is not suspended and supported by the welding machine beam 10, and the welding carriage 20 is suspended and supported by the welding machine beam 10. as the approximate horizontal during load are, by cross angle theta ₁ of the joint portion is formed by joining a plurality of beams pieces machined to less than 90 °, welder beam 10 by the load of the welding vehicle 20 Even if the wire is bent downward, the wire supply nozzle height can be kept substantially constant with respect to the member 1 to be welded, and stable welding can be performed.

  As described above, according to the single-sided welding apparatus 100 according to the embodiment, the welding machine beam 10 is lowered by the load of the welding carriage 20 while the welding carriage 20 is suspended and supported along the side surface of the welding machine beam 10. Even when it is bent in the direction, since the tip of the welding wire supply nozzle 23 can be aligned with the position of the welding line M, stable welding can be performed.

DESCRIPTION OF SYMBOLS 1 To-be-welded member 10 Welding machine beam 10a 1st beam piece 10b 2nd beam piece 11 Bearing rail 11a Recessed part 12 Gear rack 12a Recessed part 13 Projection part 14 Cable processing apparatus 20 Welding cart 20a Head frame 20b Cart body 21 First traveling mechanism 21a Bearing 21b Bracket 21c Through-hole 21d Dust-proof cover 21e Flange 22 Second traveling mechanism 22a Pinion 22b Wheel 22c Bracket 22d Flange 22e Frame 23 Welding wire supply nozzle 24 Welding line position detection mechanism 25 Nozzle movement control device 26 Flux circulator 27 Fall prevention bracket 28 Locking member 30 Backing device 30a Backing portion 30b Lifting means 30c Panel moving roller 30d Auxiliary roller 30e Magnet mechanism 30f Beam member 30g Wheel 100 Single-sided welding device M Welding line W Sectional angle of the wire theta ₁ joint

Claims (7)

A welding machine beam provided in a straight line, a welding carriage that can be run in the length direction of the welding machine beam, and is supported in a cantilever manner along a side surface of the welding machine beam; A single-side welding device having a backing device disposed on the back side of the welding line of the member,
A bearing rail and a gear rack extending parallel to each other along the length direction are provided on the upper surface of the welder beam,
The welder beam is configured by joining a plurality of beam pieces in the length direction of the welder beam, and the beam piece is upward when no load is applied when the welding carriage is not suspended and supported. It becomes a convex arch shape, and the cross-section angle of the joint is processed to be less than 90 ° so that it becomes horizontal at the time of the load supported by the welding carriage being suspended,
The welding carriage is
A first travel mechanism comprising a bearing that engages the bearing rail;
A second traveling mechanism comprising: a pinion that engages with the gear rack; and a wheel that rolls in a length direction while contacting an upper surface of the gear rack;
A welding wire supply nozzle disposed at the tip;
A welding line position detection mechanism that detects a position of the welding line and generates a detection signal indicating the position;
A nozzle movement control device that receives the detection signal from the welding line position detection mechanism and controls the movement direction and movement distance of the welding wire supply nozzle according to the detection signal;
The nozzle movement control device moves the welding wire supply nozzle in a thickness direction and a width direction of the member to be welded so that a tip of the welding wire supply nozzle is positioned on a welding line. Single side welding equipment. The second traveling mechanism is
Along the longitudinal direction of the welder beam, spaced apart at the front and rear positions, and equipped with the wheels one by one,
A frame that rotatably supports the wheel between the front and rear wheels,
The single-side welding apparatus according to claim 1, wherein a central portion of the frame is supported at one point by the welding carriage. The welder beam includes a protrusion formed along a length direction of the welder beam on a side surface opposite to a side surface on which the welding carriage is supported in a cantilever state.
The single-sided welding apparatus for a welding machine according to claim 1, wherein the welding carriage includes a fall prevention bracket that can be engaged with the protrusion. 4. The single-side welding apparatus for a welding machine according to claim 3 , wherein the number of the anti-tip brackets is the same as the number of the bearings engaged with the bearing rail. 5. The first traveling mechanism includes:
A bracket having a through hole formed in the length direction of the welder beam, while fixing the bearing to the lower end thereof;
A dust-proof cover that is inserted through the through-hole and that covers the upper surface of the bearing rail;
The single-sided welding apparatus according to claim 1, comprising: Between the bearing rail and the gear rack on the upper surface of the welding machine beam, or the side surface of the welding machine beam, one side welding according to claim 1, characterized in that the cable management device is provided apparatus. The upper surface of the welding machine beam, recess for disposing the bearing rail and the gear rack, according to claim 1, characterized in that it is formed respectively in succession in the longitudinal direction of the welding machine beam Single side welding equipment.

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