JP2007190611A - Traveling apparatus for welding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a traveling apparatus for a welding machine, in which a welding truck suspended from a welding machine beam in a cantilevered state is securely and stably supported, accurate welding can be performed, and the number of working steps and working cost can be lessened. <P>SOLUTION: The traveling apparatus for the welding machine comprises the welding machine beam 2 provided horizontally, the welding truck 10 travelably supported by the welding machine beam 2, and a welding nozzle 15 fixed to the welding truck 10. The welding machine beam 2 has a direct acting bearing rail 3 as a straight rail and a straight gear rack 4 provided parallel in the longitudinal direction on the upper face of the welding machine beam 2. The welding truck 10 includes a direct acting bearing 13 engaged with the direct acting bearing rail 3 on the upper face of the welding machine beam 2, a pinion 32 engaged with the tooth profile of the straight gear rack 4, and wheels 14 rolling on the upper flat face along the straight gear rack 4. The body 12 of the welding truck 10 is suspended and supported along the side face opposite to the side close to the direct acting bearing rail 3 on the welding machine beam 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a traveling apparatus for a welder that can reliably hold a welding carriage supported by a welder beam and that can reduce the number of processing steps and processing costs.

  In an automatic welding apparatus for performing automatic welding by running a welding machine along a beam, two running rails are installed on the beam, and four wheels arranged on the lower surface of the welding machine are placed on the rails to provide a motor. 2. Description of the Related Art There is known an automatic welding machine in which a wheel is driven by a drive source such as a motor so that a welding machine travels on a rail.

  However, such an automatic welder has a problem that it is easy to derail due to a slight balance loss. That is, when the welding wire is accidentally protruded toward the base material during automatic welding using a thick welding wire having a diameter of 4.8 mm or 6.4 mm, for example, the welding machine is lifted by the reaction and derailed. There was something to do.

  In addition, in a conventional welding machine traveling device that combines a rail and a wheel mounted on the rail, accurate linear travelability cannot be obtained, and fine meandering occurs, which impedes welding accuracy. There was a problem that. In other words, it is difficult to accurately ground all four wheels to the rail, and since one of the wheels always leaves the rail, the welding machine shakes, the tip of the welding nozzle is displaced and comes off the welding line. There is a problem in that welding is adversely affected or dust accumulates on the rail and the wheel slips to change the speed, thereby adversely affecting the welding result.

  Furthermore, because the wheels wear due to friction with the rails, and the diameter becomes smaller, the speed gradually decreases and the speed must be periodically corrected, and the wheels must be replaced within a certain limit. was there.

  On the other hand, there is known a traveling apparatus for a welding machine in which two linear motion bearing rails and one gear rack are provided on a welder beam, and the linear motion bearing and pinion drive the beam on the beam.

  FIG. 8 is an explanatory view showing a traveling device of a conventional automatic welding machine employing such a traveling mechanism, and FIG. 9 is a cross-sectional view in the direction of arrows AA in FIG.

  In FIG. 8, the welding cart 100 is formed by a flat cart body 101 with a frame assembled and a deck main body 107 having a predetermined flat portion fixed to the top of the cart body 101. The cart body 101 forms a vertical portion of the welding cart 100, and the deck body 107 forms a horizontal portion of the welding cart 100.

  The deck body 107 of the welding cart 100 is supported on the upper surface of the welder beam 112 so as to be horizontally movable, and the carriage body 101 is cantilevered so as to be suspended along one side surface of the welder beam 112. Yes.

  A plurality of, for example, three welding nozzles 102 are attached below the carriage main body 101 by a nozzle support device 103. The welding nozzle 102 is fixed so that its tip is positioned above the welding base material 109, and a flux distribution nozzle 104 is provided so as to be adjacent to the welding nozzle 102. Further, a flux collection nozzle 105 is provided at a predetermined interval so as to be adjacent to the rear of the welding nozzle 102 in the welding direction.

  The deck body 107 at the upper part of the carriage body 101 is supported so as to be positioned above the welder beam 112, and a handrail 108 is provided around the deck body 107. The deck main body 107 is provided with the same number of wire reels 106 for feeding welding wires to the welding nozzles 102 corresponding to the welding nozzles 102.

  In FIG. 9, a cart body 101 in which a frame is assembled in a flat plate shape is supported in a cantilever manner by a welder beam 112 having a square cross section, and a deck body 107 is provided on the upper part. A welding carriage 100 comprising a carriage main body 101 and a deck main body 107 is horizontally movable by two upper and lower linear motion bearings 113 provided on one side of a welding machine beam 112 and one linear gear rack 114 provided therebetween. It is supported. A cable processing unit 122 is provided immediately above the linear motion bearing 113 on the lower side of the cart body 101.

  The deck main body 107 constituting the upper horizontal portion of the welding carriage 100 is provided with a number of wire reels 106 for feeding welding wires to the welding nozzle 102 corresponding to the welding nozzles. Is provided.

  An angle member 115 projecting from the carriage body 101 to the opposite side of the welding machine beam 112 is provided below the carriage body 101 forming the vertical portion of the welding carriage 100, and a nozzle support is provided at the lower end of the angle member 115. A welding nozzle 102 is fixed via a device 103.

  The angle member 115 is provided with a wire feeding device 117 via an arm member 116, and the wire 111 is fed to the welding nozzle 102 from the wire reel 106 provided on the deck body 107 through the wire feeding device 117. Is done. The welding carriage 100 travels along the side surface of the welder beam 112 and welds the weld line of the welding base material 109 by the welding nozzle 102 that receives the welding wire 111 supplied from the wire reel 107.

  The carriage main body 101 is provided with a motor 120 with a speed reducer for giving the moving speed.

  10 is a partially cutaway side view of the welder beam of FIG. In FIG. 10, two linear motion bearing rails 113 are arranged in parallel along the length direction on the side of the welder beam 112, and adjacent to the lower side of the upper linear motion bearing rail 113. In parallel, a linear gear rack 114 is provided in parallel. Work holes 118 are provided on the back surfaces on both sides of the BB surface, which is the connecting portion of the welder beam 112.

  11 is a cross-sectional view in the direction of arrows BB in FIG. A BB surface in FIG. 10 is a connecting portion of the welder beam. In FIG. 11, a joint surface 121 is provided along the inner peripheral surface of the welder beam 112. These welder beams 112 are connected by, for example, bolts and nuts.

  12 is a cross-sectional view in the direction of arrows CC in FIG. In FIG. 12, on the side surface of the welder beam 112, linear motion bearing rails 113 are provided at two locations on the upper and lower sides, and a linear gear rack 114 is provided adjacent to the lower side of the upper linear motion bearing rail 113. . The linear bearing rail 113 and the linear gear rack 114 are provided on a machined surface obtained by cutting the surface of a horizontal member welded to a corresponding position on the side surface of the welder beam 112. Therefore, a thin steel plate is used as a constituent member of the welder beam 112.

  However, such a conventional traveling device for a welding machine uses two linear motion bearing rails, and thus has a problem that the manufacturing cost increases. Further, it is necessary to cut the welding machine beam to form a total of three rail members including two linear bearing rails and one linear gear rack, which complicates the manufacturing process and is too expensive. There was a problem.

  Examples of conventional techniques related to a welding machine traveling apparatus include Japanese Patent Application Laid-Open No. 11-47983, Japanese Patent Publication No. 51-20309, Japanese Patent Publication No. 48-34107, and the like. Japanese Patent Application Laid-Open No. 11-47983 (Patent Document 1) discloses a narrow part welding apparatus in which a traveling rail 7a and a rack 7b are attached to a cover rail body 7 and the welding carriage 6 travels along the traveling rail 7a and the rack 7b. (Patent Document 1, paragraphs 0023 and 0024, FIG. 4). Japanese Patent Publication No. 51-20309 (Patent Document 2) discloses a welding machine 4 mounted on a rail 28 for a welding machine base (Patent Document 2, page 2 column 3 of Patent Document 2). Lines 26 to 29, FIG. 2). Further, Japanese Patent Publication No. 48-34107 (Patent Document 3) discloses a welding machine 6 in which a rail 7 is installed on the girder 3 and can be loaded on the rail 7 (Patent Document 3, 2nd page, upper left column, lines 1 to 3, FIG. 2).

JP 11-47983 A Japanese Patent Publication No.51-20309 Japanese Patent Publication No. 48-34107

  However, Patent Document 1 does not relate to a traveling apparatus for a welding carriage that is eccentrically suspended so as to be cantilevered by a welder beam, and Patent Documents 2 and 3 respectively travel on a rail and on the rail. As described above, there is a problem in that linear running performance cannot be obtained and fine meandering occurs and accurate welding cannot be performed.

  The present invention has been made in view of such problems, and can accurately and stably support a welding carriage suspended in a cantilever state with respect to a welding machine beam, and perform accurate welding. It aims at providing the traveling apparatus of the welding machine which can reduce the number of processing steps and processing cost.

  A traveling device for a welding machine according to the present invention has a welding machine beam provided horizontally, a welding carriage supported so as to be able to run on the welding machine beam, and a welding nozzle fixed to the welding carriage. The welder beam has a linear rail and a linear gear rack provided parallel to the upper surface of the welder beam along the length direction, and the welding carriage engages with the linear rail on the upper surface of the welder beam; A pinion that engages the tooth profile of the linear gear rack; and a wheel that rolls on an upper plane along the linear gear rack, wherein a portion of the welding carriage is close to the linear rail in the welder beam. It is suspended and supported along the side surface opposite to the side surface.

  In the welding machine travel device according to the present invention, the wheels that roll on the upper plane along the linear gear rack are respectively provided at both ends of a frame provided along the length direction of the welder beam. In addition, it is preferable that a central portion of the frame is supported at one point on the welding carriage.

  In the traveling device for a welding machine according to the present invention, a protruding portion is provided along a longitudinal direction of a side surface of the welding machine beam adjacent to the linear rail, one end is fixed to the welding carriage, and the other end is connected to the protruding portion. It is preferable to provide a fall prevention bracket that can be engaged.

  In the traveling device for a welding machine according to the present invention, it is preferable that the overturn prevention bracket is provided corresponding to the number of the straight rails.

  In the welding machine traveling device according to the present invention, the linear rail provided on the welding carriage has a gap that penetrates in the length direction of the linear rail provided on the welder beam, and the linear rail is provided through the gap. It is preferable to provide a dustproof cover that covers the top.

  In the traveling device for a welding machine according to the present invention, a cable processing device may be disposed between a linear rail and a linear gear rack provided on the upper surface of the welder beam.

  In the traveling apparatus for a welding machine according to the present invention, the welding machine beam may be provided with a surface processing for attaching the linear rail and the linear gear rack on the upper surface thereof.

  According to the welding machine travel device of the present invention, the welding machine beam and the welding carriage are engaged with each other by the linear rail and linear gear rack provided on the upper surface of the welding machine beam, and the bearing and pinion of the welding carriage. Since a part of the welding carriage is suspended and supported along the side opposite to the side adjacent to the linear rail in the beam of the welder, the welding carriage can be reduced even if the number of linear rails is smaller than that of the prior art. Can be stably supported, and accurate welding becomes possible. In addition, since the number of manufacturing steps is reduced by reducing the number of bearings, not only material costs but also processing costs can be saved significantly.

  According to the welding machine traveling device according to claim 2 of the present application, the wheels that roll on the upper plane along the linear gear rack are provided at both ends of the frame along the length direction of the welder beam, respectively. Since the intermediate point is supported by one point on the welding carriage, the wheels at both ends of the frame abut against each other without moving away from the upper plane of the linear gear rack, and thus accurate linear travelability is obtained.

  According to the traveling device of the welding machine according to claim 3 of the present application, a protruding portion is provided along the longitudinal direction on the side surface of the welding machine beam adjacent to the linear rail, and one end is fixed to the welding carriage and the other end. Is provided with an anti-tip bracket that can be engaged with the protruding portion, so that even if the bearing is damaged and the welding cart tilts, the balance of the welding cart can be maintained and the tipping can be prevented. .

  According to the welding machine travel device according to claim 4 of the present application, since the fall prevention bracket is provided corresponding to the linear rail of the welding carriage, the engagement state between the linear rail and the bearing is favorably maintained. Further, it is possible to more reliably prevent the welding cart from falling over.

  According to the traveling device for a welding machine according to claim 5 of the present application, the bearing provided in the welding carriage has a gap penetrating in the length direction of the straight rail provided in the welding machine beam, and through this gap. Since the dust-proof cover that covers the upper part of the linear rail is provided, it is possible to prevent the entry of dust, dust, and the like into the meshing portion of the linear rail and the bearing fitted to the linear rail, and to maintain a good engagement state. .

  According to the welding machine traveling device according to claim 6 of the present application, since the cable processing device is disposed between the linear rail and the linear gear rack provided on the upper surface of the welder beam, for example, on the side surface of the welder beam. The provided cable processing apparatus becomes unnecessary.

  According to the welding machine travel device according to claim 7 of the present application, the welding machine beam has been subjected to surface processing for attaching the linear rail and the linear gear rack on the upper surface thereof. It is not necessary to weld the workpiece to the beam, the manufacturing process can be simplified, and the manufacturing cost can also be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG.1 and FIG.2 is explanatory drawing of the traveling apparatus of the welding machine which concerns on embodiment of this invention, FIG. 1 is a side view which shows the principal part, FIG. 2 is a front view.

  In FIG. 1, a square pipe welder beam 2 is stretched horizontally above a panel pass line 1. On the upper surface of the welder beam 2, linear motion bearing rails 3 and linear gear racks 4 as linear rails are provided one by one at predetermined intervals. A welding cart 10 supported by the welder beam 2 and traveling along the welder beam 2 includes a deck body 11 and a carriage body 12.

  The deck main body 11 is placed on the upper surface of the welder beam 2, and the linear motion bearing rail 3 provided on the upper surface of the welder beam 2 is disposed on the rear surface of the deck main body 11 opposite to the upper surface of the welder beam 2. A linear bearing 13 to be engaged and a pinion 31 (see FIG. 2) to be engaged with the gears of the linear gear rack 4 are provided. A wire reel 17 for feeding a welding wire 16 to a welding nozzle 15 (to be described later) and a flux circulator 18 having a rectangular shape on the upper side and a tapered shape on the lower side are provided on the upper portion of the deck body 11. A flux collection nozzle (to be described later) is connected to the flux circulator 18 via a flux collection tube 19. A handrail 20 is provided around the deck main body 11, and a ladder 21 for the operator to move up and down is disposed from a height almost the same as that of the handrail 20 to the vicinity of the panel pass line 1.

  On the back surface of the flat deck main body 11, a flat cart body 12 having a frame is assembled so as to be orthogonal to the deck main body 11. The cart main body 12 is a linear motion bearing rail 3 of the welder beam 2. Is cantilevered so as to be suspended along the side surface opposite to the side surface adjacent to.

  A welding nozzle 15 is fixed below the carriage main body 12 via a nozzle support device 25 fixed to a frame member 22 in which a horizontal member and a vertical member are combined. The wire feeding device 6 is fixed to the upper portion of the welding nozzle 15 via the arm member 24 in the frame member 22. A welding wire 16 is supplied to the welding nozzle 15 from a wire reel 17 on the deck body 11 via the wire feeding device 6.

  In FIG. 2, a linear gear rack 4 is provided on the upper surface of the welder beam 2 arranged horizontally, and a number of longitudinal tooth profiles are formed on the side surface of the linear gear rack 4. A deck main body 11 that is a constituent member of the welding carriage 10 is mounted on the upper portion of the welder beam 2, and a pinion 31 having a tooth shape that meshes with the tooth shape of the linear gear rack 4 is provided on the back surface of the deck main body 11. Yes.

  A motor 32 for driving the pinion 31 is provided adjacent to the upper portion of the pinion 31. When the motor 32 is activated, the pinion 31 rotates about a vertical rotation axis. At this time, the tooth profile of the pinion 31 meshes with the tooth profile of the linear gear rack 4 and rotates, whereby the welding carriage 10 including the deck body 11 and the carriage body 12 travels along the welder beam 2 in the horizontal direction.

  On the deck body 11, a flux circulator 18 having a box shape and having two reduced diameter portions that are reduced in diameter toward the bottom portion is disposed, and the flux circulator 18 is controlled so as to be adjacent to each other with a ladder 21 interposed therebetween. A board 40 is arranged. The ladder 21 is disposed in a portion from the same height as the handrail 20 of the deck main body 11 to the vicinity of the panel pass line 1, and this ladder 21 is used when the operator moves up and down to the deck main body 11.

  A cart body 12 that is cantilevered so as to be suspended along the side surface of the welder beam 2 is fixed to the back surface of the deck body 11. A frame 34 having a length substantially the same as the width of the carriage main body 12 is supported by a pin 33 at substantially the center of the upper end of the carriage main body 12, and a pair of wheels is provided at both ends of the frame 34. 14 is arranged. The pair of wheels 14 roll on the upper plane of the linear gear rack 4 disposed on the upper surface of the welder beam 2. Since the frame 34 is supported at one point in the center of the upper end portion of the carriage main body 12, the wheels 14 disposed at both ends of the frame 34 are, for example, in a state of being overwhelmed, and without being lifted up, respectively, Rolls in contact with.

  A plurality of welding nozzles 15 are supported and fixed to the frame material 22 at the lower part of the carriage main body 12 via a nozzle support device 25. Each welding nozzle 15 is provided with a flux distribution nozzle 35 arranged in parallel with each other, and the flux distribution nozzle 35 is connected to a tapered bottom portion of a flux circulator 18 provided on the deck body 11. The flux is supplied through the flux supply tube 36.

  A flux recovery nozzle 37 is disposed at the end opposite to the welding direction of the nozzle support device 25 that supports the welding nozzle 15, and surplus flux remaining without being used during welding causes the flux recovery nozzle 37 and the flux recovery. It is sucked through the tube 19 and collected by the flux circulator 18 provided on the deck body 11.

  FIG. 3 is a right side view showing the main part of FIG. In FIG. 3, a deck main body 11 that forms a part of the welding carriage 10 is mounted on the welder beam 2 so as to be able to travel. A linear motion bearing rail 3 is provided at the right end of the upper surface of the welder beam 2 in the drawing, and a linear gear rack 4 is provided at the left end in the drawing.

  A linear motion bearing 13 that engages with the linear motion bearing rail 3 on the upper surface of the welder beam 2 is provided on the back surface of the deck body 11. A pinion 31 that meshes with the tooth profile of the linear gear rack 4 is provided on the back surface of the deck main body 11, and a motor 32 for rotating the pinion 31 is provided above the pinion 31. A cable processing unit 47 is provided between the linear motion bearing rail 3 on the upper surface of the welding machine beam 2 and the linear gear rack 4, and a cable is wired therein. In the prior art, the cable processing unit 47 is provided on the side surface side of the welder beam 2.

  The upper part of the deck main body 11 is surrounded by a handrail 20, and a wire reel 17 for feeding the welding wire 16 to the welding nozzle 15 is provided. In addition, a flux circulator 18 having a box shape and a reduced diameter portion is disposed on the upper portion of the deck body 11. A lighting device 44 is provided below the flux circulator 18 via a support 45.

  A carriage main body 12 is provided on the back surface of the deck main body 11 so as to hang downward along the side surface of the welder beam 2, and is prevented from falling over the welding machine beam 2 so as to face the carriage main body 12. A bracket 41 is provided. The upper end of the overturn prevention bracket 41 is fixed to the deck main body 11, and the lower end is engageable with a protrusion 43 provided on the side surface of the welder beam 2 along the longitudinal direction of the welder beam. As a result, when the welding cart 10 cantilevered by the welder beam 2 is tilted to the right in FIG.

  FIG. 4 is a rear view showing the main part of FIG. In FIG. 4, a linear motion bearing rail 3 is provided on the upper surface of the welder beam 2, and the welding carriage 10 is placed on this rail via two linear motion bearings 13 that are engaged with the linear motion bearing rail 3. A deck main body 11 is mounted.

  One end of a fall prevention bracket 41 that prevents the welding cart 10 including the deck body 11 from falling is fixed to the bottom frame of the deck body 11, and the other end of the fall prevention bracket 41 is a linear motion bearing of the welder beam 2. It is provided on a side surface close to the rail 3 so as to be engageable with a protrusion 43 fixed so as to protrude along the length direction of the welder beam 2. As the welding carriage 10 moves, the tipping prevention bracket 41 moves while its tip is adjacent to the protrusion 43 of the welder beam 2. Two fall prevention brackets 41 are provided corresponding to the number of the linear motion bearings 13.

  The upper portion of the deck main body 11 is surrounded by a handrail 20, and the number of wire reels 17 corresponding to the welding nozzle 15 is provided. A cable processing device 47 is disposed in the gap between the upper surface of the welder beam 2 and the deck body 11.

  Next, a linear motion bearing and a linear gear rack applied to the present embodiment will be described with reference to FIGS.

  FIG. 5 is a view showing a linear motion bearing disposed between the welder beam 2 and the deck main body 11 of the welding carriage 10. In FIG. 5, the surface processing for providing a linear motion bearing rail is directly performed on the upper surface of the square pipe-shaped welder beam 2. That is, a cutting portion 56 having a predetermined depth is provided on the upper surface of the square pipe-shaped welder beam 2, and the linear motion bearing rail 3 is fixed in the cutting portion 56 by welding or bolts and nuts.

  The linear motion bearing rail 3 is engaged with the linear motion bearing 13 opened downward so as to be fitted to the linear motion bearing rail 3 via a bearing 58. The linear motion bearing 13 is fixed to a flat plate-like bracket 51, and the bracket 51 is fixed to a raised base 53 on the upper portion thereof by bolts via spacers 52 arranged at both left and right ends. The raising base 53 is fixed to the deck main body 11 of the welding carriage 10 via a flange 54 at the top thereof.

  The gap between the bracket 51 and the raising base 53 penetrates the linear bearing assembly formed by the linear bearing 13, the bracket 51, the raising base 53 and the like along the length direction of the linear bearing rail 3. It is formed as follows.

  In the present embodiment, a dust-proof cover 55 that covers the entire upper periphery of the linear motion bearing rail 3 provided on the upper surface of the welder beam 2 through the gap is provided. Thus, the upper part of the linear motion bearing rail 3 is covered with the dustproof cover 55, and accumulation of dust, dust and the like on the linear motion bearing rail 3 is prevented. Therefore, it is possible to eliminate the biting of dust, dust and the like between the linear motion bearing rail 3 and the linear motion bearing 13 fitted thereto, and maintain a good engagement state. The dust cover is made of, for example, a steel belt.

  FIG. 6 is an enlarged view showing the linear gear rack 4 provided on the upper surface of the welder beam 2 and the wheels 14 rolling on the upper plane of the linear gear rack 4. In FIG. 6, a cutting portion 57 is formed on the upper surface of the welder beam 2 by cutting. A linear gear rack 4 is fixed in the cutting portion 57 along the length direction of the welder beam 2.

  On the side surface of the linear gear rack 4, a tooth profile 61 that meshes with the pinion 31 described above is formed. A wheel 14 is placed on the upper plane of the linear gear rack 4, and the wheel 14 is mainly composed of a wheel main body 62 and an axle (not shown) that rotatably supports the wheel main body 62. Yes. The wheel body 62 is supported by wheel fixing plates 64 disposed on both sides thereof, and the support shaft 63 is rotatably attached to the bracket 65 via end plates 66 at both ends thereof. The bracket 65 is fixed to the lower surface of the deck main body 11 of the welding cart 10 by a flange 66 at the upper portion thereof.

  FIG. 7 is an enlarged cross-sectional view of a welder beam in the present embodiment. In FIG. 7, the cutting part 56 for linear motion bearing rails and the cutting part 57 for linear gear racks are cut directly on the upper surface of the square pipe-shaped welder beam 2. As a result, it is not necessary to weld the rail-forming plate member to the welder beam 2, and the manufacturing process can be simplified. In the present embodiment, a square pipe having such a thickness that can be formed by directly cutting the cutting portion 56 for the linear motion bearing rail and the cutting portion 57 for the linear gear rack as the welder beam 2 is used. .

  Next, operation | movement of the traveling apparatus of the welding machine which concerns on this embodiment comprised in this way is demonstrated.

  First, the welder beam 2 is moved onto the weld line of the workpiece to be welded arranged along the panel path line 1. The welding machine beam 2 is moved by a beam moving device (not shown).

  After moving the welder beam 2 onto the weld line, a backing material is placed on the back surface of the weld line. After arranging the backing material, the welding machine beam 2 is lowered, and the tip of the welding nozzle 15 is arranged on the welding line of the welding material for each welding carriage 10 supported by the welding machine beam 2.

  In this state, when the automatic welding start switch provided in the control device 40 is turned ON, the flux spray nozzle 35 fixed below the carriage main body 12 of the welding carriage 10 passes through the flux supply tube 36 from the flux circulator 18. The upper flux is supplied, and the upper flux is dispersed on the groove of the weld line. At this time, the welding wire 16 is fed from the wire reel 17 through the wire feeding device 6 to the welding nozzle 15 provided so as to be adjacent to the flux spraying nozzle 35, and the welding torch to which the welding nozzle 15 is attached. Is supplied with a predetermined voltage, and single-sided submerged arc welding using the welding nozzle 15 is started. Excess flux is recovered by the flux recovery nozzle 37.

  At this time, the motor 32 provided on the back surface of the deck main body 11 of the welding carriage 10 is activated to rotate the pinion 31. Since the pinion 32 rotates in mesh with the tooth profile of the linear gear rack 4, the welding carriage 10 including the deck main body 11 and the carriage main body 12 moves along the length direction of the welder beam 2 with this rotation.

  At this time, the linear motion bearing 13 that engages with the linear motion bearing rail 3 provided on the upper surface of the welder beam 2 via the bearing 58 is engaged with the linear motion bearing rail 3 as the deck body 11 moves. (See FIG. 5).

  On the other hand, the wheels 14 mounted on the upper plane of the linear gear rack 4 provided on the upper surface of the welder beam 2 are disposed at both ends of the frame 34 supported at one point on the upper portion of the carriage body 12. Both of them abut against the upper plane of the linear gear rack 4 and roll (see FIGS. 2 and 6). Accordingly, the welding carriage 10 stably travels along the length direction of the welder beam 2. In this way, single-sided submerged arc welding is performed along the weld line of the material to be welded by the welding nozzle 15 fixed to the welding carriage that travels stably along the welder beam 2.

  According to the present embodiment, the welding machine beam and the welding carriage 10 are engaged with each other by one linear motion bearing provided on the upper surface of the welding machine beam 2 and one linear gear rack and pinion. Since the vertical portion of the welding carriage 10 is suspended and supported along the side opposite to the side close to the dynamic bearing rail, the welding carriage 10 can be stably supported, and accurate running and welding can be performed. It becomes possible. The welding carriage 10 has a structure eccentric to one side, but the carriage main body 12 of the welding carriage 10 is cantilevered along the side surface opposite to the side surface close to the linear motion bearing rail 3 of the welding machine beam 2. Since it is supported, the overturning of the welding carriage 10 is regulated by the linear motion bearing rail 3 and the linear motion bearing 13 engaged therewith. That is, the upward acting force due to the eccentricity of the welding carriage is held by the linear motion bearing, and the downward acting force is received by the wheel 14.

  Further, according to the present embodiment, since the number of manufacturing steps is reduced by reducing the number of rails, not only the material cost but also the processing cost can be remarkably saved.

  According to the present embodiment, the linear gear rack 4 and the pinion 31 meshing with the linear gear rack 4 are combined, and the pinion 31 is rotated by the drive motor 32 so as to move the welding carriage 10 horizontally. The moving speed of the welding carriage, that is, the welding speed can be accurately maintained, and stable welding can be performed. Moreover, the linear running property of the welding trolley | bogie 10 is securable by employ | adopting a linear motion bearing rail.

  Further, according to the present embodiment, one wheel 14 that rolls on the upper plane along the linear gear rack 4 is provided at each end of the frame 34 along the length direction of the welder beam 2. Since the center point of the frame is supported by one point on the welding carriage, the wheels 14 at both ends of the frame 34 both roll in contact with the upper plane of the linear gear rack, thereby enabling accurate traveling.

  According to this embodiment, by providing the overturn prevention bracket 41, even if the bearing is broken, it is possible to prevent the welding cart, that is, the welding machine from overturning.

  In addition, according to the present embodiment, the dust-proof cover 55 is provided over the entire length of the linear motion bearing rail 3, so that accumulation of dust, dust, etc. on the linear motion bearing rail is prevented and the life of the bearing is extended. Can do.

  According to the present embodiment, since no rails other than the linear motion bearing rail 3 and the linear gear rack 4 are arranged on the upper surface of the welder beam 2, a cable processing device can be arranged between them, for example, a welder beam. It is possible to omit the cable processing device provided on the side surface.

  Moreover, according to this embodiment, the complicated operation of welding a processing member becomes unnecessary by performing the process which drills the cutting part for rails directly into the welding machine beam 2. FIG. Therefore, the number of manufacturing steps can be reduced and the manufacturing cost can be reduced.

  The traveling device of the welding machine of the present invention that can reliably hold the welding carriage that is eccentrically suspended from the beam of the welding machine and that can reduce the number of processing steps and the processing cost uses a welding robot. It was especially useful in the field of automatic welding.

It is a side view which shows the traveling apparatus of the welding machine which concerns on embodiment of this invention. It is a front view which shows the traveling apparatus of the welding machine which concerns on embodiment of this invention. It is a side view which shows the principal part of FIG. It is a rear view which shows the principal part of FIG. It is an enlarged view which shows the linear motion bearing part of FIG. It is an enlarged view which shows the linear gear rack part of FIG. It is sectional drawing which shows the welder beam of FIG. It is a front view which shows a prior art. It is an AA arrow direction sectional view of FIG. It is a side view which shows the welding machine beam of a prior art. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG.

Explanation of symbols

1: Panel pass line 2: Welding machine beam 3: Linear motion bearing rail 4: Linear gear rack 6: Wire feeding device 10: Welding cart 11: Deck main body 12: Dolly main body 13: Linear motion bearing 14: Wheel 15: Welding Nozzle 16: welding wire 17: wire reel 18: flux circulator 19: flux recovery tube 20: handrail 21: ladder 22: frame member 24: arm member 25: nozzle support device 27: auxiliary member 31: pinion 32: motor 33: Pin 34: Frame 35: Flux distribution nozzle 36: Flux supply tube 37: Flux collection nozzle 40: Control panel 41: Overturn prevention bracket 43: Projection 44: Illuminator 45: Support 47: Cable processing unit 51: Bracket 52: Spacer 53: Raising stand 54: Flange 55: Dust cover 56: Cutting Part 57: cutting part 58: bearing 61: tooth profile 62: wheel body 63: support shaft 64: wheel fixing plate 65: bracket 66: flange 100: welding carriage 101: carriage body 102: welding nozzle 103: nozzle support device 104: flux Spray nozzle 105: Flux recovery nozzle 106: Wire reel 107: Deck main body 108: Handrail 109: Welding base material 110: Stand material 111: Welding wire 112: Welding machine beam 113: Linear motion bearing rail 114: Linear gear rack 115: Angle Material 116: Arm member 117: Wire feeding device 118: Work hole 119: Horizontal member 120: Motor with speed reducer 121: Joining surface 122: Cable processing section

Claims (7)

  A welding machine beam provided horizontally, a welding carriage supported by the welding machine beam so as to be able to travel; and a welding nozzle fixed to the welding carriage; and the welding machine beam has a length on an upper surface thereof. A linear rail and a linear gear rack provided in parallel along a direction, wherein the welding carriage engages with a linear rail on the upper surface of the welder beam, and a pinion that engages with a tooth profile of the linear gear rack And a wheel rolling on an upper plane along the linear gear rack, wherein a part of the welding carriage is along a side surface opposite to a side surface adjacent to the linear rail in the welder beam. A welding machine traveling device characterized by being supported by suspension.   Wheels rolling on the upper plane along the linear gear rack are respectively provided at both ends of a frame provided along the length direction of the welder beam, and the center portion of the frame is the welding carriage. The welding machine travel device according to claim 1, wherein the welding device is supported at one point.   A protrusion is provided along the longitudinal direction on the side surface of the welder beam adjacent to the linear rail, and a fall prevention bracket is provided with one end fixed to the welding carriage and the other end engageable with the protrusion. The traveling apparatus for a welding machine according to claim 1 or 2, wherein the traveling apparatus is a welding machine.   The traveling device for a welding machine according to claim 3, wherein the overturn prevention bracket is provided corresponding to the number of the straight rails.   The straight rail provided on the welding carriage has a gap penetrating in the length direction of the straight rail provided on the welder beam, and a dustproof cover is provided to cover the upper portion of the straight rail through the gap. The traveling device for a welding machine according to any one of claims 1 to 4, wherein:   The traveling apparatus for a welding machine according to any one of claims 1 to 5, wherein a cable processing device is disposed between a linear rail and a linear gear rack provided on the upper surface of the welder beam. .   The welder beam according to any one of claims 1 to 6, wherein the welder beam has a surface processed for attaching the linear rail and the linear gear rack to an upper surface thereof. Traveling device.

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