Flux recovery device

Abstract

To provide a flux recovery device with improved recovery efficiency for flux.SOLUTION: A flux recovery device 1 recovers flux covering slag formed on a weld bead after submerged arc welding, and comprises a suction nozzle 10 having a suction port for sucking up the flux, and a body portion for storing the flux sucked through the suction nozzle 10. The suction nozzle 10 is configured such that a notch portion 31 selected from among the plurality of notch portions 31 in different sizes correspondingly to the size of the convex outer surface of the slag can be held at the tip of the suction port.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a flux recovery device.

Background Art

[0002] Conventionally, a flux recovery device used for recovering the flux covering the slag formed on the weld bead after performing submerged arc welding on a base material has become widespread. When recovering the flux by this flux recovery device, while directing the tip of the suction port of the suction nozzle to the convex outer surface of the slag, the suction nozzle is moved along the extending direction of the weld bead. Thereby, the flux covering the slag can be sequentially sucked from the suction port. As a document disclosing this type of flux recovery device, for example, there is Japanese Utility Model Laid-Open No. 4-129578 (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, from the viewpoint of improving the recovery efficiency of the flux by the flux recovery device, it is desirable not to generate a gap between the tip of the suction port of the suction nozzle and the convex outer surface of the slag. However, the outer surface of this slag varies in size depending on various welding conditions such as the heat input amount of welding and the groove dimensions of the base material.

[0005] In order to suppress the generation of such a gap, in some cases, the tip of the suction port is processed at the welding site so as to match the size of the outer surface of the slag. However, performing such processing places a large burden on the operator.

[0006] Accordingly, the present invention has been made in view of the above-described points, and an object thereof is to provide a flux recovery device in which the recovery efficiency of the flux is improved.

Means for Solving the Problems

[0007] The flux recovery device according to the present invention recovers the flux covering the slag formed on the weld bead after submerged arc welding, and includes a suction nozzle provided with a suction port for sucking the flux, and a main body portion for accommodating the flux sucked from the suction nozzle. In the flux recovery device according to the present invention, the suction nozzle is configured to be able to hold a notch selected from a plurality of notches having different sizes corresponding to the size of the convex outer surface of the slag at the tip of the suction port.

[0008] By configuring in this way, the gap between the tip of the suction nozzle and the outer surface of the slag can be effectively reduced, so that the flux recovery efficiency can be improved.

[0009] In the flux recovery device according to the present invention, it is preferable that the plurality of notches include a first notch and a second notch larger than the first notch. In that case, it is preferable that the first notch is formed in a first member, and the first member is detachably attached to the second notch.

[0010] By configuring in this way, the flux recovery efficiency can be improved with a simple configuration.

[0011] In the flux recovery device according to the present invention, the end face of the suction port may extend in a first direction orthogonal to the axial direction of the suction nozzle. In that case, it is preferable that each of the plurality of notches is located at the central portion of the end face in the first direction. Further in that case, it is preferable that the end face is inclined so as to intersect obliquely with respect to the axial direction when viewed from the first direction.

[0012] By configuring in this way, the burden on the operator who performs the flux suction operation can be reduced.

[0013] In the flux recovery device based on the present invention, it is preferable that each of the plurality of notches has a substantially semicircular shape when viewed from a second direction orthogonal to both the axial direction and the first direction.

[0014] By configuring in this way, the shapes of the plurality of notches can be configured to be substantially similar to the shape of the outer surface of the slag, so that the gap between the tip of the suction nozzle and the outer surface can be more effectively reduced.

Effect of the Invention

[0015] According to the present invention, it becomes possible to provide a flux recovery device in which the flux recovery efficiency is improved.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiments shown below, the same or common parts are denoted by the same reference numerals in the drawings, and the description thereof will not be repeated.

[0018] (Embodiment) FIG. 1 is a perspective view of a flux recovery device according to an embodiment. FIG. 2(A) is a schematic perspective view for explaining a state of recovering flux using the flux recovery device shown in FIG. 1. FIG. 2(B) is a schematic side view of a suction nozzle or the like as viewed from the direction of arrow IIB shown in FIG. 2(A). FIG. 3 is a schematic cross-sectional view of a base material or the like after welding along line III-III in FIG. 2(A). FIGS. 4(A) and 4(B) are a side view and a front view, respectively, of the vicinity of the head portion of the suction nozzle shown in FIG. 1, which are enlarged. FIG. 5 is a front view for explaining the configuration of the head portion shown in FIG. 4. First, with reference to FIGS. 1 to 5, the flux recovery device 1 according to the present embodiment will be described.

[0019] As shown in FIGS. 1 to 5, the flux recovery device 1 recovers the flux 100 covering the slag 200 formed on the weld bead 300 after the submerged arc welding of the base material 1000 (see particularly FIGS. 1 to 3).

[0020] The flux recovery device 1 includes a suction nozzle 10, a main body portion 50, and a gantry 60. The suction nozzle 10 is provided with a suction port for sucking the flux 100. The main body portion 50 accommodates the flux 100 sucked from the suction nozzle 10.

[0021] The root portion of the suction nozzle 10 is connected to the side wall of the main body portion 50. The main body portion 50 is fixed to the gantry 60. Casters are attached to the gantry 60. Thereby, the suction nozzle 10 and the main body portion 50 are configured to be movable.

[0022] A negative pressure source (not shown) is connected to the main body portion 50. For example, a ring blower is used as the negative pressure source.

[0023] The suction nozzle 10 is provided with a suction path 10b for sucking the flux 100 toward the accommodation space of the main body 50. The suction nozzle 10 includes a flexible hose portion 20 and a hollow head portion 30 attached to the tip of the hose portion 20. In the present embodiment, the head portion 30 corresponds to the suction port of the suction nozzle 10.

[0024] As shown in FIGS. 4(A) and 4(B), the head portion 30 has an outer shape with a tapered shape in which the dimension in the width direction (the left-right direction in FIG. 4(B)) increases from the base side toward the tip side. The end face 30a of the head portion 30 extends in a first direction D1 orthogonal to the axial direction D0 of the suction nozzle 10. The end face 30a of the head portion 30 is inclined so as to intersect obliquely with respect to the axial direction D0 when viewed from the first direction D1 (see particularly FIG. 4(A)).

[0025] The head portion 30 is detachably attached to the hose portion 20. As an example, in the present embodiment, a hose nipple (not shown) is fixed to the end of the hose portion 20 on the head portion 30 side using a hose band 70. The head portion 30 is detachably attached to the hose portion 20 by screwing a female screw provided at the base portion of the head portion 30 onto the male screw of this hose nipple. Note that the method of detachably attaching the head portion 30 to the hose portion 20 is not limited to the method described above and can be appropriately changed.

[0026] The space inside the head portion 30 communicates with the space inside the hose portion 20. These internal spaces define the suction path 10b of the suction nozzle 10. One end of the suction path 10b is connected to the accommodation space of the main body 50. The other end of the suction path 10b opens at the tip of the head portion 30. By driving the above-described negative pressure source to generate a negative pressure in the suction path 10b, the flux 100 is sucked toward the accommodation space of the main body 50 via the suction path 10b.

[0027] The hose portion 20 is made of a flexible material such as rubber, for example. The head portion 30 is made of a metal material, for example. In the present embodiment, a rubber hose portion 20 and an aluminum head portion 30 are used.

[0028] As shown in FIGS. 4(B) and 5, a notch portion 31 is provided at the tip of the head portion 30. More specifically, a plurality of notch portions 31 having different sizes are provided in each of the front side portion (i.e., the front side of the paper in FIGS. 4(B) and 5) of the tip of the head portion 30 and the back side portion (i.e., the back side of the paper in FIGS. 4(B) and 5) of the tip. In the following, only the plurality of notch portions 31 provided in the front side portion of the tip of the head portion 30 will be described, and the description of the plurality of notch portions 31 provided in the back side portion will not be repeated. This is because the configuration of the plurality of notch portions 31 provided in the back side portion is the same as the configuration of the plurality of notch portions 31 located on the front side.

[0029] The plurality of notch portions 31 are located at the center of the end face 30a of the head portion 30 in the first direction D1. The plurality of notch portions 31 include a first notch portion 31a and a second notch portion 31b larger than the first notch portion 31a. The first notch portion 31a and the second notch portion 31b have a substantially semicircular shape when viewed from the second direction D2 orthogonal to both the axial direction D0 and the first direction D1.

[0030] The first notch portion 31a is formed in the first member. The second notch portion 31b is formed in a second member integrally formed with the portion of the head portion 30 other than the first notch portion 31a.

[0031] The first member is detachably attached to the second notch portion 31b. More specifically, magnets (not shown) are attached to the surface of the portion of the first member facing the second notch portion 31b and the surface of the portion of the second notch portion 31b facing the first member. Due to the magnetic force of these pair of magnets, the first member is detachably attached to the second notch portion 31b.

[0032] Note that the method of detachably attaching the first member to the second notch portion 31b is not particularly limited to the method using the magnetic force of magnets and can be variously changed. As an example of another method, for example, an adhesive may be used instead of a magnet.

[0033] Thus, in the flux recovery device 1, the suction nozzle 10 is configured to be able to hold the notch portion 31 selected corresponding to the size of the convex outer surface 200a of the slag 200 from among a plurality of notch portions 31 having different sizes at the tip of the head portion 30 as a suction port. More specifically, in a state where the first member is attached to the second notch portion 31b (see FIG. 4(B)), the first notch portion 31a is held at the tip of the head portion 30, and in a state where the first member is detached from the second notch portion 31b (see FIG. 5), the second notch portion 31b is held at the tip of the head portion 30.

[0034] When recovering the flux 100 using the flux recovery device 1, first, a ring blower as a negative pressure source connected to the main body portion 50 is driven. Thereby, a negative pressure is generated in the suction path 10b, and the suction of the flux 100 is started.

[0035] Next, as shown in FIGS. 2(A) and 2(B), the tip of the head portion 30 as the suction port of the suction nozzle 10 is applied to the convex outer surface 200a of the slag 200. More specifically, the notch portion 31 of the head portion 30 is applied to the outer surface 200a of the slag 200 so that no gap is generated between the tip of the head portion 30 and the outer surface 200a of the slag 200.

[0036] Next, while the tip of the head portion 30 is applied to the outer surface 200a of the slag 200, the suction nozzle 10 is moved along the extending direction of the welding bead 300 (see the arrow AR in FIG. 2(A)). As a result, the flux 100 distributed along the extending direction is sequentially sucked.

[0037] Here, the size of the outer surface 200a of the slag 200 varies depending on various welding conditions. Therefore, when the size of the notch portion 31 provided at the tip of the head portion 30 of the suction nozzle 10 is significantly different from the size of the outer surface 200a of the slag 200, a large gap is generated between the tip of the head portion 30 and the outer surface 200a of the slag 200, and as a result, the recovery efficiency of the flux 100 is greatly reduced.

[0038] In this regard, in the flux recovery device 1 according to the present embodiment, as described above, the suction nozzle 10 is configured to be able to hold either one selected corresponding to the size of the outer surface 200a of the slag 200 from among the first notch portion 31a and the second notch portion 31b having different sizes at the tip of the head portion 30.

[0039] With this configuration, when the outer surface 200a of the slag 200 is large, the first notch portion 31a is detached from the second notch portion 31b, and thus the second notch portion 31b can be held at the tip of the head portion 30. When the outer surface 200a of the slag 200 is small, the first notch portion 31a is attached to the second notch portion 31b, and thus the first notch portion 31a can be held at the tip of the head portion 30. As a result, the gap between the tip of the head portion 30 and the outer surface 200a of the slag 200 can be effectively reduced.

[0040] Therefore, by configuring the flux recovery device 1 according to the present embodiment, a flux recovery device capable of improving the recovery efficiency of the flux can be obtained.

[0041] In the flux recovery device 1 according to the present embodiment, as described above, the first notch portion 31a is formed in the first member, and the first member is detachably attached to the second notch portion 31b.

[0042] By configuring in this way, without making major changes to most of the suction nozzle 10, by only performing the attachment and detachment operation of the first member, which is relatively small compared to the entire suction nozzle 10, the notch portion 31 selected corresponding to the size of the outer surface 200a of the slag 200 can be held at the tip of the head portion 30. As a result, a flux recovery device 1 with a simple configuration and improved flux recovery efficiency can be achieved.

[0043] Furthermore, in the flux recovery device 1 according to the present embodiment, as described above, the end face 30a of the head portion 30 is inclined so as to intersect obliquely with respect to the axial direction D0 when viewed from the first direction D1.

[0044] By configuring in this way, the burden on the operator performing the suction operation of the flux 100 can be reduced.

[0045] More specifically, when the operator grips the suction nozzle 10 so that the tip of the head portion 30 is applied to the outer surface 200a of the slag 200, due to the inclination of the end face 30a of the head portion 30 as described above, the operator can grip the suction nozzle 10 in a state where it is inclined more than in the state of standing upright along the vertical direction (that is, in a state where it is laid down more than in the upright state) (see Fig. 2(B)). Therefore, the operator can grip the suction nozzle 10 in a more comfortable posture.

[0046] Further, in the flux recovery device 1 according to the present embodiment, as described above, the first notch portion 31a and the second notch portion 31b have a substantially semicircular shape when viewed from the second direction D2. Thereby, the shapes of the first notch portion 31a and the second notch portion 31b can be configured to be substantially similar to the shape of the outer surface 200a of the slag 200. As a result, the gap between the tip of the head portion 30 and the outer surface 200a of the slag 200 described above can be more effectively reduced.

[0047] In addition, in the above-described present embodiment, the case where the plurality of notch portions 31 include a total of two notch portions, i.e., the first notch portion 31a and the second notch portion 31b, has been exemplified and described. However, the number of the notch portions 31 is not particularly limited to two, and may be a plurality of three or more. For example, in addition to the first notch portion 31a and the second notch portion 31b, the plurality of notch portions 31 may further include a third notch portion that is smaller than the first notch portion 31a and is detachably attached thereto.

[0048] (Modification example) FIG. 6 is a front view for explaining the configuration of the suction nozzle of the flux recovery device according to the modification example. Hereinafter, with reference to FIG. 6, a flux recovery device 1A according to a modification example based on the above-described embodiment will be described.

[0049] As shown in FIG. 6, the flux recovery device 1A according to the present modification example has a different configuration of the suction nozzle 10 when compared with the flux recovery device 1 according to the above-described embodiment.

[0050] More specifically, in the suction nozzle 10 of the flux recovery device 1A, the head portion 30 that is detachably attached to the hose portion 20 includes a first head portion 30A and a second head portion 30B. A first notch portion 31a is provided at the tip of the first head portion 30A. A second notch portion 31b is provided at the tip of the second head portion 30B. The second notch portion 31b is configured to be larger than the first notch portion 31a.

[0051] In this modification, the first notch portion 31a is formed integrally with the portion of the first head portion 30A other than the first notch portion 31a. Similarly, the second notch portion 31b is formed integrally with the portion of the second head portion 30B other than the second notch portion 31b.

[0052] In the flux recovery device 1A according to this modification, the first head portion 30A provided with the first notch portion 31a at the tip and the second head portion 30B provided with the second notch portion 31b larger than the first notch portion 31a at the tip are detachably attached to the hose portion 20 as described above. Thus, in the flux recovery device 1A, the suction nozzle 10 is configured to be able to hold the notch portion 31 selected from among a plurality of notch portions 31 (that is, the first notch portion 31a and the second notch portion 31b) having different sizes corresponding to the size of the outer surface 200a of the slag 200 at the tip of its suction port.

[0053] Even in the case of such a configuration, the same effects as those described in the above-described embodiment can be obtained, and a flux recovery device can be provided in which the flux recovery efficiency is improved.

[0054] (Other forms, etc.) In the embodiments and modifications thereof described above, the shapes, configurations, sizes, numbers, materials, etc. of the respective parts shown can be variously changed without departing from the gist of the present invention.

[0055] In addition, the characteristic configurations shown in the above-described embodiments and modifications of the present invention can be naturally combined with each other without departing from the gist of the present invention.

[0056] Thus, the above-described embodiments and modifications disclosed this time are illustrative in all respects and not restrictive. The technical scope of the present invention is defined by the scope of the claims, and includes all modifications within the meaning and scope equivalent to the description of the scope of the claims.

Description of Symbols

[0057] 1,1A flux recovery device, 10 suction nozzles, 30a end face, 31 notch, 31a first notch, 31b second notch, 50 main body, 100 flux, 200 slag, 200a outer surface, 300 weld bead.

Claims

1. A flux recovery device for recovering a flux covering slag formed on a weld bead after submerged arc welding, comprising: a suction nozzle provided with a suction port for sucking the flux; a main body portion for accommodating the flux sucked from the suction nozzle; and the suction nozzle is configured to be able to hold a notch selected from a plurality of notches having different sizes corresponding to the size of the convex outer surface of the slag at the tip of the suction port. The flux recovery device.

2. The plurality of notches include a first notch and a second notch larger than the first notch, the first notch is formed in a first member, The flux recovery device according to claim 1, wherein the first member is detachably attached to the second notch.

3. An end face of the suction port extends in a first direction orthogonal to an axial direction of the suction nozzle, each of the plurality of notches is located at a central portion of the end face in the first direction, The flux recovery device according to claim 1 or 2, wherein the end face is inclined so as to intersect obliquely with respect to the axial direction when viewed from the first direction.

4. The flux recovery device according to claim 3, wherein each of the plurality of notches has a substantially semicircular shape when viewed from a second direction orthogonal to both the axial direction and the first direction.

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