Submerged arc welder

Abstract

To reduce a workload of handling a weld wire in loading the weld wire in a wire reel.SOLUTION: A submerged arc welder 1 includes a wire reel 10 and a drive mechanism 100. The wire reel 10 supports a weld wire 2. The drive mechanism 100 can move the wire reel 10 in the vertical direction.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a submerged arc welding machine.

Background Art

[0002] As a prior art document disclosing the configuration of a wire reel for submerged arc welding, there is Japanese Utility Model Laid-Open Publication No. 7-33461 (Patent Document 1). The wire reel for submerged arc welding described in Patent Document 1 is connected to a support shaft.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When supplying the welding wire from the wire reel, in order to reduce the load such as bending stress on the welding wire during supply, the welding wire may be arranged above the submerged arc welding machine. In this case, when manually attaching the heavy welding wire to the wire reel, it is necessary to lift the welding wire up to the height of the wire reel. Therefore, when attaching the welding wire to the wire reel, the load of the handling work of the welding wire is high.

[0005] The present invention has been made to solve the above problems, and an object thereof is to provide a submerged arc welding machine capable of reducing the load of the handling work of the welding wire when attaching the welding wire to the wire reel.

Means for Solving the Problems

[0006] The submerged arc welding machine according to the present invention includes a wire reel and a drive mechanism. The wire reel supports a welding wire. The drive mechanism is capable of moving the wire reel in the vertical direction.

[0007] In this case, when attaching the welding wire to the wire reel, the wire reel can be lowered downward in the vertical direction, and the welding wire can be attached to the wire reel. Thereby, when manually attaching the welding wire to the wire reel, it is not necessary to lift the heavy welding wire to a high position, so that the load of the handling work of the welding wire can be reduced.

[0008] In one embodiment of the present invention, the drive mechanism is capable of moving the wire reel to an arbitrary position within the above-mentioned vertical movement range.

[0009] In this case, the height of the wire reel when attaching the welding wire to the wire reel can be easily adjusted. Further, since the attachment height position of the wire reel during welding can be adjusted so as to reduce the load such as bending stress applied to the welding wire during the supply of the welding wire, the load applied to the welding wire can be reduced and the welding wire can be stably supplied.

[0010] In one embodiment of the present invention, the submerged arc welding machine further includes a column and a pulley member. The column extends in the above-mentioned vertical direction, and the wire reel is movably connected in the above-mentioned vertical direction. The pulley member is provided on the column. The drive mechanism is a winch. The winch has a rope member. The rope member is wound around the pulley member and connected to the wire reel.

[0011] In this case, compared with the case where the drive mechanism is constituted by a fluid such as hydraulic pressure, the configuration of the drive mechanism can be simplified.

[0012] In one embodiment of the present invention, the submerged arc welding machine further includes a traveling unit. The traveling unit is capable of traveling along the welding planned location. The column is mounted on the traveling unit. The winch is supported by the column.

[0013] In this case, in a submerged arc welding machine equipped with a traveling unit, by mounting a support column on the traveling unit and supporting the winch by the support column, a winch, which is a driving mechanism, can be provided at a position close to the moving location of the wire reel and stably with respect to the machine body.

[0014] In one embodiment of the present invention, the submerged arc welding machine further includes a traveling unit that can travel along the welding planned location. The main body of the submerged arc welding machine is mounted on the upper surface of the traveling unit. The driving mechanism can move the wire reel until the lower end of the wire reel is positioned below the upper surface of the traveling unit.

[0015] Thereby, the wire reel can be disposed lower compared to the case where the wire reel is lowered to the height of the upper surface of the traveling unit. As a result, by making the height for lifting the welding wire lower, the load of the handling work of the welding wire can be reduced.

Effect of the Invention

[0016] According to the present invention, when attaching the welding wire to the wire reel, the load of the handling work of the welding wire can be reduced.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiment for Carrying Out the Invention

[0018] Hereinafter, the submerged arc welding machine according to each embodiment of the present invention will be described with reference to the drawings. In the description of the following embodiments, the same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated.

[0019] In the drawings, the traveling direction of the traveling part provided in the submerged arc welding machine is defined as the X direction, the direction orthogonal to the traveling direction of the traveling part is defined as the Y direction, and the moving direction of the wire reel provided in the submerged arc welding machine is defined as the Z direction.

[0020] (Embodiment 1) FIG. 1 is a front view showing the configuration of the submerged arc welding machine according to Embodiment 1 of the present invention.

[0021] As shown in FIG. 1, the submerged arc welding machine 1 welds the workpiece 3 while supplying the flux 7 so as to cover the periphery of the welding planned location 4 of the workpiece 3.

[0022] The submerged arc welding machine 1 according to Embodiment 1 of the present invention includes a wire reel 10, a wire supply unit 20, a torch unit 30, a hopper unit 40, a traveling unit 50, a drive mechanism 100, a support column 110, and a pulley member 120.

[0023] The wire reel 10 supports the welding wire 2. The wire reel 10 includes a support portion 11. The support portion 11 supports the wound welding wire 2. One end of the welding wire 2 is drawn out toward the wire supply unit 20 while rotating in the circumferential direction in which the welding wire 2 is wound around the support portion 11.

[0024] A plurality of rollers 12 are provided on the support portion 11. The plurality of rollers 12 are rotatable along the winding axis direction in which the welding wire 2 is wound. Since the welding wire 2 rolls by the rotation of the plurality of rollers 12, it becomes easier to draw out the welding wire 2 toward the wire supply unit 20.

[0025] One end of the welding wire 2 drawn from the wire reel 10 is inserted into the inside of the wire supply unit 20. The wire supply unit 20 supplies the welding wire 2 to the torch unit 30. Note that the welding wire 2 may be protected by being coated with a flux around it between being drawn from the wire reel 10 and being supplied to the wire supply unit 20.

[0026] In the torch unit 30, the welding wire 2 protrudes from the tip toward the workpiece 3. By passing an electric current through the welding wire 2 and the workpiece 3, an arc is generated between the welding wire 2 and the workpiece 3, thereby welding the workpiece 3.

[0027] The hopper unit 40 houses the flux 7. The flux 7 is supplied through the hose 41 to the periphery of the welding wire 2 and the workpiece 3 at the welding planned location 4. By the flux 7 covering the arc and the molten metal, the intrusion of the atmosphere into the welding location is suppressed.

[0028] The traveling unit 50 is located below the submerged arc welder 1. The traveling unit 50 is placed on the rail 5. The traveling unit 50 is capable of traveling on the rail 5. Thereby, the submerged arc welder 1 can move on the rail 5 during welding by driving the traveling unit 50.

[0029] The rail 5 extends along the welding planned location 4. The welding planned location 4 in the present embodiment is linear and extends in the X direction. For this reason, the rail 5 extends linearly along the welding planned location 4. The traveling unit 50 is capable of traveling along the welding planned location 4. In the present embodiment, the traveling unit 50 travels in the X direction.

[0030] The main body of the submerged arc welder is mounted on the upper surface 55 of the traveling unit 50. Specifically, on the upper surface 55 of the traveling unit 50, components necessary for performing welding such as the wire reel 10, the wire supply unit 20, and the hopper unit 40 are mounted.

[0031] The submerged arc welding machine 1 is provided with a control unit (not shown). By operating the welding conditions in the control unit, the welding conditions of the workpiece 3 can be appropriately set.

[0032] The drive mechanism 100 can move the wire reel 10 in the vertical direction (Z direction). Specifically, the drive mechanism 100 can move the wire reel 10 to any position within the movable range in the vertical direction (Z direction).

[0033] The drive mechanism 100 in the present embodiment is a winch 130. The winch 130 has a rope member 131 and a handle 132.

[0034] The rope member 131 is wound around the pulley member 120. The rope member 131 is connected to the wire reel 10.

[0035] The winch 130 can be manually operated. By gripping and rotating the handle 132 of the winch 130, the wire reel 10 can be moved in the Z direction via the rope member 131.

[0036] The column 110 extends in the vertical direction (Z direction). The wire reel 10 is movably connected in the vertical direction (Z direction). The movable range of the winch 130, which is the drive mechanism 100, is the range that can move along the column 110.

[0037] The column 110 is mounted on the traveling unit 50. In the present embodiment, the lower end of the column 110 is connected to the side surface of the traveling unit 50. Since the lower end of the column 110 is directly connected and fixed to the side surface of the traveling unit 50, the wire reel 10 is stably arranged with respect to the submerged arc welding machine 1.

[0038] The pulley member 120 is provided on the support column 110. In the present embodiment, the pulley member 120 is provided at the upper end of the support column 110. Note that the pulley member 120 may be arranged at any position on the support column 110 as long as the wire reel 10 can move in the Z direction.

[0039] The winch 130 is supported by the support column 110. In the present embodiment, the winch 130 is located below the center of the support column 110 in the Z direction. Thereby, since the operation of attaching the welding wire 2 is performed below the fuselage, it is easy to perform both the operation of the winch 130 and the operation of attaching the welding wire 2 simultaneously. Further, by providing the configuration including the winch 130 below the fuselage, the center of gravity can be lowered and the stability of the fuselage can be improved.

[0040] FIG. 2 is a cross-sectional view of the submerged arc welding machine of FIG. 1 as viewed from the direction of the arrow II-II. As shown in FIG. 2, the wire reel 10 in the present embodiment can be fixed to the support column 110. The wire reel 10 is fixed to the support column 110 by a fixing member 140. Specifically, the shaft portion 13 of the wire reel 10 is fixed to the support column 110 by the fixing member 140.

[0041] It fits with the protrusion of the support column 110 and the recess of the shaft portion 13. Thereby, when moving the wire reel 10 relative to the support column 110, the wire reel 10 can be mainly positioned in the Y direction and moved in the vertical direction (Z direction).

[0042] The fixing member 140 includes a plate-like member 141, a first fastening member 142, and a second fastening member 143. The plate-like member 141 is connected to the shaft portion 13 by the first fastening member 142. The plate-like member 141 is in close contact so as to surround at least a part of the support column 110.

[0043] The plate-like member 141 includes a first member 145 and a second member 146. The first member 145 and the second member 146 are in close contact so as to surround at least a part of the support column 110 while avoiding interference with the rope member 131, the winch 130, and the like.

[0044] The first member 145 and the second member 146 are fastened by the second fastening member 143. As a result, the plate-like member 141 is closely fixed to the support column 110. Consequently, since the position of the wire reel 10 in the Z direction can be fixed, the tension can be prevented from always being applied to the rope member 131 of the winch 130.

[0045] Note that the method for fixing the wire reel 10 to the support column 110 is not limited. The method for fixing the wire reel 10 to the support column 110 may be, for example, directly connecting the shaft portion 13 of the wire reel 10 to the support column 110 by a fastening member. Further, the member for fixing the wire reel 10 is not limited to the support column 110, and other configurations may be used.

[0046] When moving the wire reel 10 relative to the support column 110, after loosening the second fastening member 143 and fixing the plate-like member 141 to the support column 110, the winch 130 is operated.

[0047] FIG. 3 is a front view showing a state in which the wire reel included in the submerged arc welding machine according to Embodiment 1 of the present invention has moved downward in the vertical direction.

[0048] When the welding wire 2 is consumed, it is necessary to attach a new welding wire 2 to the wire reel 10. The welding wire 2 is manually attached to the wire reel 10.

[0049] The weight of the welding wire 2 is, for example, 25 kg or more and 78 kg or less. Therefore, the welding wire 2 is a heavy object.

[0050] In the submerged arc welding machine 1 according to the present embodiment, when supplying the bundled welding wire 2 wound from the wire reel 10 to the wire supply unit 20, in order to reduce the load such as bending stress on the welding wire 2 during the supply, the welding wire 2 is disposed above the submerged arc welding machine 1. Therefore, the wire reel 10 is disposed above the submerged arc welding machine 1.

[0051] Assuming that the position of the wire reel 10 in the Z direction is fixed, when manually attaching the welding wire 2 to the wire reel 10, it is necessary to lift the welding wire 2 up to the height of the wire reel 10 disposed above the submerged arc welding machine 1. For this reason, when attaching the welding wire 2 to the wire reel 10, the load of the handling operation of the welding wire 2 is high.

[0052] As shown in FIG. 3, in the submerged arc welding machine 1 according to the present embodiment, by turning the handle 132 of the winch 130, the wire reel 10 is moved in the vertical direction (Z direction). When attaching the welding wire 2 to the wire reel 10, the wire reel 10 is moved downward in the vertical direction (Z direction) along the DR1 direction in FIG. 3. Thereby, it is not necessary to lift the welding wire 2 up to the height of the wire reel 10 disposed above the submerged arc welding machine 1. As a result, when attaching the welding wire 2 to the wire reel 10, the load of the handling operation of the welding wire 2 is reduced.

[0053] The winch 130 which is the drive mechanism 100 can move the wire reel 10 until the lower end 15 of the wire reel 10 is positioned below the upper surface 55 of the traveling unit 50. For this reason, in the submerged arc welding machine 1 including the traveling unit 50, the attachment position of the wire reel 10 can be made lower as compared with the case of lowering the wire reel 10 to the upper surface 55 in the Z direction.

[0054] After attaching the welding wire 2 to the wire reel 10, turn the handle 132 of the winch 130 to move the wire reel 10 upward in the vertical direction (Z direction). Thereafter, by fixing the wire reel 10 to the support column 110, the welding wire 2 is fixed above the submerged arc welding machine 1.

[0055] The wire reel 10 is movable to any position within the range where the vertical (Z-direction) support column 110 is located by the winch 130. Therefore, when supplying the welding wire 2 from the wire reel 10 to the wire supply unit 20, the vertical position of the wire reel 10 can be adjusted to a position where a load such as bending stress is less likely to be applied to the welding wire 2 extending from the wire reel 10 according to the thickness or length of the welding wire 2.

[0056] Note that the drive mechanism 100 may be a type driven by hydraulic pressure or pneumatic pressure. Also, the winch 130 is not limited to a manually operated type and may be an electric winch that is automatically driven. When the drive mechanism 100 is an electric winch, since the height of the wire reel 10 can be changed during welding, a load such as bending stress applied to the welding wire 2 during welding can be reduced.

[0057] In the submerged arc welding machine 1 according to Embodiment 1 of the present invention, since the wire reel 10 can be driven in the vertical direction (Z-direction) by the drive mechanism 100, when attaching the welding wire 2 to the wire reel 10, the wire reel 10 can be lowered downward in the vertical direction (Z-direction) to attach the welding wire 2 to the wire reel 10. Thereby, when manually attaching the welding wire 2 to the wire reel 10, it is not necessary to lift the heavy welding wire 2 to a high position, so the load of the handling work of the welding wire 2 can be reduced.

[0058] In the submerged arc welding machine 1 according to Embodiment 1 of the present invention, since the wire reel 10 is movable to any position within the movable range in the vertical direction (Z-direction), the height of the wire reel 10 when attaching the welding wire 2 to the wire reel 10 can be easily adjusted. Also, when the welding wire 2 is supplied to the wire supply unit 20, when the bending radius of the welding wire 2 becomes small, a load such as bending stress is likely to be applied to the welding wire 2. Since the attachment height position of the wire reel 10 during welding can be adjusted to a position where the load is reduced, the welding wire can be stably supplied.

[0059] In the submerged arc welding machine 1 according to Embodiment 1 of the present invention, by configuring the drive mechanism 100 with a winch 130, the configuration of the drive mechanism 100 can be simplified as compared with the case where the drive mechanism 100 is configured by a hydraulic drive method.

[0060] In the submerged arc welding machine 1 according to Embodiment 1 of the present invention, a support column 110 is mounted on the traveling unit 50, and the winch 130 is supported by the support column 110. Thus, in the submerged arc welding machine 1 having the traveling unit 50 and involving movement of the machine body, a winch, which is the drive mechanism 100, can be provided at a position close to the moving location of the wire reel 10 and stably with respect to the machine body.

[0061] In the submerged arc welding machine 1 according to Embodiment 1 of the present invention, since the lower end 15 of the wire reel 10 can be disposed at a position lower than the upper surface 55 of the traveling unit, the wire reel 10 can be disposed further downward as compared with the case where the wire reel 10 is lowered to the height of the upper surface 55 of the traveling unit 50. As a result, the height for lifting the welding wire 2 can be made lower, so that the load of the handling work of the welding wire 2 can be reduced.

[0062] (Embodiment 2) Hereinafter, the submerged arc welding machine according to Embodiment 2 of the present invention will be described with reference to the drawings. Since the configuration of the main body of the submerged arc welding machine mounted on the traveling unit according to Embodiment 2 of the present invention is different from that of the submerged arc welding machine 1 according to Embodiment 1 of the present invention, the description of the same configuration as that of the submerged arc welding machine 1 according to Embodiment 1 of the present invention will not be repeated.

[0063] FIG. 4 is a front view showing the configuration of the submerged arc welding machine according to Embodiment 2 of the present invention. FIG. 5 is a side view showing the configuration of the submerged arc welding machine according to Embodiment 2 of the present invention.

[0064] As shown in FIGS. 4 and 5, the submerged arc welding machine 1A in this embodiment further includes a rotation mechanism. The rotation mechanism includes an arm 60 and a rotation shaft 61.

[0065] The arm 60 is attached to the upper surface 55 of the traveling unit 50. The arm 60 supports other components such as the wire reel 10. The arm 60 can rotate on the traveling unit 50 in the circumferential direction in the Z direction (DR2 direction in FIG. 4) around the rotation shaft 61 provided on the traveling unit 50.

[0066] The control unit 70 is arranged adjacent to the wire reel 10. By operating the welding conditions in the control unit 70, the welding conditions of the workpiece 3 can be appropriately set.

[0067] The control unit 70 is provided with a handle 71. By gripping the handle 71 and rotating the control unit 70 in the circumferential direction in the Z direction, other components can be rotated in the circumferential direction in the Z direction with respect to the traveling unit 50. Thereby, it is easy to align the welding wire 2 with the planned welding location 4.

[0068] From the viewpoint of lowering the center of gravity of the machine body and maintaining the stability of the machine body, it is preferable that the traveling unit 50 has a wide area when viewed from the Z direction. However, considering the miniaturization of the machine body, etc., the housing of the traveling unit 50 can be configured as a rectangle having a longitudinal direction in the traveling direction (X direction) when viewed from the Z direction. Furthermore, considering the miniaturization of the machine body, an arrangement in which components such as the wire reel 10 are gathered near the center of the machine body can be considered. For this reason, a configuration can be adopted in which the wire reel 10 is aligned with the traveling unit 50 in the vertical direction (Z direction) at a specific rotation angle in the circumferential direction in the Z direction, and the wire reel 10 is not aligned with the traveling unit 50 in the vertical direction (Z direction) at another rotation angle in the circumferential direction in the Z direction.

[0069] In the present embodiment, as shown in FIG. 4, when the wire reel 10 and the wire supply unit 20 are arranged side by side with respect to the traveling direction (X direction) of the submerged arc welding machine 1A, the posture of the main body of the submerged arc welding machine 1A is defined as the first posture. In this case, the wire reel 10 is arranged side by side with the traveling unit 50 in the vertical direction (Z direction).

[0070] On the other hand, as shown in FIG. 5, when the wire reel 10 and the wire supply unit 20 are arranged side by side with respect to the direction (Y direction) orthogonal to the traveling direction of the submerged arc welding machine 1A, the posture of the main body of the submerged arc welding machine 1A is defined as the second posture. In this case, the wire reel 10 is not arranged side by side with the traveling unit 50 in the vertical direction (Z direction).

[0071] In the state of the second posture, when moving the wire reel 10 in the DR3 direction in FIG. 5, since the wire reel 10 is not arranged side by side with the traveling unit 50 in the vertical direction (Z direction), the lower end 15 of the wire reel 10 can be arranged at a position lower than the upper surface 55 of the traveling unit 50. As a result, in the state of the second posture, compared with the state of the first posture, the wire reel 10 can be moved to a lower position, so that the height for lifting the welding wire 2 is reduced, and the load of the replacement work of the welding wire 2 can be reduced.

[0072] In the submerged arc welding machine 1A according to Embodiment 2 of the present invention, the wire reel 10 is arranged side by side with the traveling unit 50 in the vertical direction (Z direction) in the first posture, and the wire reel 10 is not arranged side by side with the traveling unit 50 in the vertical direction (Z direction) in the second posture. By adopting such a configuration, the main body of the submerged arc welding machine 1A having the traveling unit 50 can be downsized while maintaining the stability of the machine body. Further, by adopting a configuration in which the wire reel 10 is not arranged side by side with the traveling unit 50 in the vertical direction (Z direction) in the second posture, the lower end 15 of the wire reel 10 can be positioned lower than the upper surface 55 of the traveling unit 50 as compared with the case where the wire reel 10 is lowered to the upper surface 55 of the traveling unit 50, and the height for lifting the welding wire 2 to the wire reel 10 can be made lower. As a result, in the submerged arc welding machine 1A having the traveling unit 50, while maintaining the stability of the machine body and downsizing it, the load of the handling work of the welding wire 2 can be reduced.

[0073] [Appendix] As described above, this embodiment includes the following disclosures.

[0074] [Configuration 1] A wire reel (10) for supporting a welding wire (2), A submerged arc welding machine (1) comprising a drive mechanism (100) capable of moving the wire reel (10) in the vertical direction.

[0075] [Configuration 2] The submerged arc welding machine (1) according to Configuration 1, wherein the drive mechanism (100) is capable of moving the wire reel (10) to an arbitrary position within the movable range in the vertical direction.

[0076] [Configuration 3] A column (110) extending in the vertical direction and having the wire reel (10) movably connected thereto in the vertical direction, Further comprising a pulley member (120) provided on the column (110), The drive mechanism (100) is a winch (130) having a rope member (131), The submerged arc welding machine (1) according to Configuration 1 or Configuration 2, wherein the rope member (131) is wound around the pulley member (120) and connected to the wire reel (10).

[0077] [Configuration 4] Further comprising a traveling part (50) capable of traveling along the welding planned location (4), The column (110) is mounted on the traveling part (50), The winch (130) is supported by the column (110), and the submerged arc welding machine (1) according to Configuration 3.

[0078] [Configuration 5] Further comprising a traveling part (50) capable of traveling along the welding planned location (4), The main body of the submerged arc welding machine (1) is mounted on the upper surface (55) of the traveling part (50), The driving mechanism (100) is capable of moving the wire reel (10) until the lower end (15) of the wire reel (10) is positioned below the upper surface (55) of the traveling part (50), and the submerged arc welding machine (1) according to any one of Configurations 1 to 3.

[0079] It should be noted that the above-described embodiments disclosed this time are illustrative in all respects and do not serve as a basis for a limiting interpretation. Therefore, the technical scope of the present disclosure is not construed only by the above-described embodiments. Also, all changes within the meaning and scope equivalent to the claims are included. In the description of the above-described embodiments, combinable configurations may be combined with each other.

Explanation of Reference Numerals

[0080] 1, 1A Submerged arc welding machine, 2 Welding wire, 4 Welding planned location, 10 Wire reel, 15 Lower end, 50 Traveling part, 55 Upper surface, 100 Driving mechanism, 110 Column, 120 Pulley member, 130 Winch, 131 Rope member.

Claims

1. A submerged arc welding machine comprising a wire reel for supporting a welding wire and a drive mechanism for vertically moving the wire reel.

2. The submerged arc welding machine according to Claim 1, wherein the drive mechanism is capable of moving the wire reel to any position within the vertical movement range.

3. Further comprising a column extending in the vertical direction and having the wire reel movably connected thereto in the vertical direction, and a pulley member provided on the column. The drive mechanism is a winch having a rope member. The submerged arc welding machine according to Claim 1 or Claim 2, wherein the rope member is wound around the pulley member and connected to the wire reel.

4. Further comprising a traveling unit capable of traveling along a welding planned location. The column is mounted on the traveling unit. The winch is supported by the column. The submerged arc welding machine according to Claim 3.

5. Further comprising a traveling unit capable of traveling along a welding planned location. The main body of the submerged arc welding machine is mounted on the upper surface of the traveling unit. The submerged arc welding machine according to Claim 1 or Claim 2, wherein the drive mechanism is capable of moving the wire reel until the lower end of the wire reel is positioned below the upper surface of the traveling unit.

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