JP2021148001A - Manufacturing method for joint body - Google Patents

Abstract

To suppress welding failure.SOLUTION: A joint body has a first split member, a second split member, and a connection member. The first split member has a first base part, and a first joint part provided at an end of the first base part. The second split member has a second base part, and a second joint part provided at the end of the second base part. The connection member has a protrusion part. Then, in a state where the first joint part and the second joint part are in contact with each other, the first split member, the second split member, and the protrusion part are welded.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a method for manufacturing a bonded body by welding.

A technique for forming a cylindrical member by two divided members having an arcuate cross section is known. Specifically, such a tubular member is configured by abutting and welding the edges forming both ends of the arcuate cross section of these divided members. Further, as an example of such a technique, in Patent Document 1, each edge portion of one dividing member is formed so as to bulge outward, and when the edge portions of each dividing member are butted against each other, each edge portion of the one dividing member is formed. It is described that the edge of the other dividing member is fitted inside the edge.

However, when a tubular member is constructed by such a technique, if there is an error in the dimensions of the divided members, a gap is likely to occur when the edges of the divided members are butted against each other. Then, when the edges of the divided members that are butted against each other with such a gap are welded to each other, welding defects are likely to occur. In particular, when the split member is large, the dimensional error of the split member tends to be large, and as a result, such a gap is likely to occur. Therefore, it is necessary to form each divided member with high accuracy.

On the other hand, there is also known a technique of forming a tubular member by forming a flange portion at an edge portion of each dividing member and welding the flange portions of each dividing member. According to such a technique, even if there is some error in the dimensions of the divided members, the flange portions of the divided members can be brought into good contact with each other. Therefore, it is possible to suppress the formation of a gap when the flange portions of the divided members are butted against each other, and thereby it is possible to suppress the occurrence of welding defects.

Japanese Unexamined Patent Publication No. 2008-121550

However, the root portion of the flange portion of the split member has a roundness. Therefore, when the flange portions of the divided members are brought into contact with each other, a gap may be formed when the root portions of the flange portions face each other. As a result, when other members are welded in the vicinity of the root portion of the flange portion, welding defects may occur.

In one aspect of the present disclosure, it is desirable to suppress welding defects.

One aspect of the present disclosure is a method for manufacturing a joined body having a first divided member, a second divided member, and a connecting member. The first dividing member has a first base portion and a first joint portion provided at an end of the first base portion. The second dividing member has a second base portion and a second joint portion provided at the end of the second base portion. The connecting member has a protrusion. Then, in a state where the first joint portion and the second joint portion are in contact with each other and the protrusion is inserted between the first division member and the second division member, the first division member and the second division member , Welding with the protrusions is performed.

According to the above configuration, welding of the first division member, the second division member, and the protrusion is performed in a state where the protrusion of the coupling member is arranged in the gap between the first division member and the second division member. Is done. Therefore, at the time of welding, it is possible to suppress the occurrence of melt-off in the vicinity of the gap. In addition, it is possible to prevent spatter from entering the gap and leaving foreign matter inside the bonded body. Therefore, welding defects can be suppressed.

Further, one aspect of the present disclosure is a second divided member having a base portion and a joint portion protruding from the end of the base portion, and a curved portion formed at a portion forming a boundary between the base portion and the joint portion. The present invention relates to a method for manufacturing a joint having the first and second divided members and a connecting member. In the manufacturing method, the first and second divided members and the coupling member are arranged in the contact state. In the abutting state, the joints of the first and second divided members are in contact with each other, and the curved portions of these joints face each other to form a gap, and the joint members are the first and second divided members. Along with being in contact with the base portion of the above, a protrusion formed on the coupling member is arranged in the gap. Then, the first and second dividing members arranged in the contact state and the connecting member are joined by welding. In the joining, welding is performed from the boundary between the first dividing member and the connecting member to the boundary between the second dividing member and the connecting member while passing through the protrusion.

According to the above configuration, in the contact state, the protrusions of the coupling member are arranged in the gaps formed by the curved portions of the contacted joints. Therefore, when welding is performed from the boundary between the first dividing member and the connecting member to the boundary between the second dividing member and the connecting member across the curved portion of the abutting joint, in the vicinity of the curved portion. It is possible to suppress the occurrence of melting off. Further, in this case, it is possible to prevent spatter from entering the gap formed by the curved portion and leaving foreign matter inside the bonded body. Therefore, welding defects can be suppressed.

The dividing member may have first and second joints, which are two joints provided at both ends of the base. Further, the joint may have N (N is an integer of 2 or more) dividing members and a connecting member in which N protrusions are formed. Then, in the manufacturing method described above, N split members and coupling members may be arranged in a contact state. In the abutting state, the first joint portion of each of the divided members and the second joint portion of the other divided member are in contact with each other, and the curved portion of the first joint portion and the curved portion of the second joint portion are in contact with each other. A gap may be formed facing each other. Further, in the contact state, the coupling member may be in contact with the base of each of the dividing members, and the respective protrusions may be arranged in the respective gaps. Further, the N split members and the coupling members arranged in the contact state may be joined by welding. In the joining, welding may be performed from the boundary between one of the two dividing members adjacent to the protrusion and the connecting member to the boundary between the other and the connecting member while passing through each protrusion.

According to the above configuration, in the abutting state, the first and second joints of the divided members are abutted and arranged, and the gaps formed by the curved portions of the abutted first and second joints are formed. A protrusion of a coupling member is arranged in. For this reason, when welding is performed across the curved portions of the first and second joints that are in contact with each other, it is possible to prevent melt-through or spatter from entering the gap in the vicinity of the curved portions. .. Therefore, welding defects can be suppressed.

Further, the joint may have an outer shell member that surrounds the internal space and a cap that closes the opening of the outer shell member. Further, the outer shell member may have N divided members, and the cap may be configured as a connecting member. Further, the first and second joints may be flange-shaped portions protruding from both ends of the base portion. Then, in the contact state, the outer shell member is further formed by arranging the respective dividing members so that the base surrounds the internal space and the respective joints project toward the outside of the internal space. The cap may be arranged so as to cover the opening of the outer shell member.

According to the above configuration, when welding the outer shell member formed by the N divided members and the cap covering the opening of the outer shell member, welding defects can be suppressed.
Further, the joint may have an outer shell member surrounding the internal space and N tubular members that protrude from the opening of the outer shell member and are provided so as to cover the opening. Further, the outer shell member is configured as a connecting member, and a plurality of protrusions may be formed on the inner peripheral surface of the outer shell member. Further, each tubular member is configured as a dividing member, and a part of the tubular member forms a base, and each portion of the tubular member protruding from both ends of the base is first and second. A joint may be formed. Then, in the abutting state, each tubular member is further arranged so that the base portion is along the inner peripheral surface of the outer shell member and the first and second joint portions project toward the internal space. You may.

According to the above configuration, when welding the outer shell member and N tubular members provided so as to cover the opening of the outer shell member and project from the opening, welding defects can be suppressed.
Further, the protrusion may be formed by pressing and deforming the material constituting the coupling member.

According to the above configuration, the protrusion can be easily formed.
Further, the protrusion may be formed by joining another member to the connecting member.
According to the above configuration, the protrusion can be formed by a member having a shape corresponding to the shape of the gap formed in the abutting joint. Therefore, the gap can be closed better, and when welding is performed across the curved portion of the abutting joint, melt-down occurs in the vicinity of the curved portion, or spatter enters the gap. Welding can be further suppressed.

Further, the joint may be a component that allows the exhaust gas of the vehicle to flow down.
According to the above configuration, welding defects can be suppressed when manufacturing a part that causes the exhaust gas of the vehicle to flow down. Further, since it is possible to suppress spatter from entering the gap between the abutted joints, it is possible to suppress the residual foreign matter inside the component, and as a result, it is possible to suppress the generation of abnormal noise while the vehicle is running. ..

It is a perspective view of the joined body of 1st Embodiment. It is an enlarged view of the 1st and 2nd flange portions and the protrusions in the perspective view of FIG. It is a front view of the joined body of 1st Embodiment. It is an enlarged view of the 1st and 2nd flange portions and the protrusions in the front view of FIG. It is a perspective view of the joined body of the 2nd Embodiment. It is an enlarged view of the 1st and 2nd joints and the protrusions in the perspective view of FIG. It is a front view of the joined body of the 2nd Embodiment. It is an enlarged view of the 1st and 2nd joints and the protrusions in the front view of FIG. 7. It is an enlarged view (perspective view) of the 1st and 2nd flanges and the protrusions in the modified example of 1st Embodiment. It is an enlarged view (front view) of the 1st and 2nd flanges and the protrusions in the modified example of 1st Embodiment. It is an enlarged view (front view) of the 1st and 2nd joints and the protrusions in the modified example of 2nd Embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The embodiments of the present disclosure are not limited to the following embodiments, and various embodiments may be adopted as long as they belong to the technical scope of the present disclosure.

[First Embodiment]
[1. Structure of the joint]
The joint 1 of the first embodiment is mounted on a vehicle and is configured as a component that allows exhaust gas from the engine to flow down (see FIGS. 1 to 4). Specifically, the joint 1 may be, for example, a member constituting a muffler of a vehicle, or a member accommodating a purification device (for example, a catalyst) for purifying exhaust gas. As an example, the joint body 1 may be made of a metal such as a steel material.

The joint body 1 includes an outer shell member 10 and a cap 4.
The outer shell member 10 is a tubular member that surrounds the internal space 12. As an example, the cross section of the outer shell member 10 orthogonal to the extension direction is substantially circular. The outer shell member 10 has first and second divided members 2 and 3 (details will be described later) which are plate-shaped members.

The cap 4 is a substantially circular lid-shaped member that covers the opening 11 formed in the outer shell member 10. The cap 4 includes a main body 40, an opening 41, an edge 42, and two protrusions 43.

The cross section of the outer shell member 10 orthogonal to the extension direction may have a shape other than a substantially circular shape. Specifically, the cross section may be, for example, a circular shape or a substantially polygonal shape, or may have a shape in which irregularities are formed on the edges. Further, the cap 4 has a shape capable of covering the opening 11 of the outer shell member 10.

The main body 40 is a substantially circular plate-shaped portion.
The opening 41 is provided at substantially the center of the main body 40, and is a portion that forms an opening that penetrates the main body 40.

The edge portion 42 is a wall-shaped portion that protrudes from the outer edge of the main body portion 40 toward the internal space 12 side, and is provided so as to surround the main body portion 40.
The protrusion 43 is a portion that protrudes outward from the outer peripheral surface of the edge 42. The protrusions 43 are provided at positions facing each other with the substantially center of the main body 40 interposed therebetween.

Further, the first dividing member 2 includes a base portion 20 and first and second flange portions 21 and 22.
The base portion 20 is a plate-shaped portion having a cross section curved in an arc shape.

The first and second flange portions 21 and 22 are flange-shaped portions protruding from both ends of the base portion 20, and face each other with the base portion 20 interposed therebetween. More specifically, the first and second flange portions 21 and 22 project outward from the portions corresponding to both ends of the arcuate cross section of the base portion 20. Further, as will be described in detail later, the first dividing member 2 is formed by deforming a flat plate material by, for example, press molding or the like. Therefore, a curved portion 23 is formed at the boundary portion between each of the first and second flange portions 21 and 22 and the base portion 20 (in other words, the root portion of each flange portion). The curved portion 23 may be intentionally formed. Further, the curved portion 23 is not limited to the curved surface as shown in FIG. 4, and may extend linearly (in other words, a planar shape) from the base portion 20 toward the first or second flange portions 21 and 22. .. Further, the curved portion 23 may have a shape having a step.

On the other hand, the second dividing member 3 is configured in the same manner as the first dividing member 2, and includes a base portion 30 and first and second flange portions 31, 32. Further, similarly to the first dividing member 2, in the second dividing member 3, a curved portion 33 is formed at the boundary portion between each of the first and second flange portions 31 and 32 and the base portion 30.

[2. Manufacturing method of the joint]
The method for manufacturing the bonded body 1 includes a forming step, an arranging step, and a welding step. Each step will be described below.

(1) Forming Step In the forming step, a plurality of members including the first and second dividing members 2 and 3 constituting the joint body 1 and the cap 4 are formed. Specifically, these members may be formed by deforming a flat plate material by, for example, press molding or the like.

Each protrusion 43 on the edge 42 of the cap 4 is generated in the process of forming the cap 4 in the forming step. That is, each protrusion 43 is formed by pressing and deforming a plate material (in other words, a material) used for forming the cap 4.

(2) Arrangement Step In the arrangement step, the first and second dividing members 2, 3 and the cap 4 are arranged in contact with each other (see FIGS. 1 to 4). In the abutting state, the outer shell member 10 is formed by the first and second divided members 2 and 3, and the opening 11 of the outer shell member 10 is closed by the cap 4.

Specifically, in the abutting state, the bases 20 and 30 of the dividing members 2 and 3 arranged so as to form the outer shell member 10 surround the internal space 12, and the flanges of the dividing members 2 and 3 are provided. The portions 21, 22, 31, and 32 project toward the outside of the internal space 12. Further, in the contact state, the first flange portion of each of the split members 2 and 3 and the second flange portion of the other split member are in contact with each other, and the curved portions 23 and 33 of the two flange portions that are in contact with each other are in contact with each other. A gap 13 is formed facing each other. In the first embodiment, since the outer shell member 10 is formed by the two dividing members 2 and 3, two gaps 13 are formed. Further, in the abutting state, the edge portion 42 of the cap 4 arranged so as to close the opening 11 of the outer shell member 10 abuts on the base portions 20 and 30, and the two protrusions 43 formed on the edge portion 42. Are arranged in each gap 13 (see FIGS. 2 and 4).

In the arrangement step, one dividing member, the cap 4, and the other dividing member may be arranged in order so as to be laminated.
(3) Welding Step In the welding step, the first and second dividing members 2 and 3 arranged in contact with each other and the cap 4 are joined by welding. Specifically, in the welding step, welding extending along the boundary between the edge portion 42 of the cap 4 and the edge portion surrounding the opening 11 in the outer shell member 10 formed by the first and second dividing members 2 and 3. Welding is performed along line 100 (see FIG. 3). The welding line 100 passes through each protrusion 43 of the cap 4 arranged in each gap 13 between the first and second flanges (see FIG. 4). That is, in the welding step, while passing through each protrusion 43, welding is performed from the boundary between one of the two dividing members adjacent to the protrusion 43 and the edge 42 to the boundary between the other and the edge 42. Will be done.

Further, in the welding step, the first and second flange portions 21 and 32 and the first and second flange portions 31 and 22 arranged in contact with each other in the arrangement step are welded, respectively.

[Second Embodiment]
[3. Structure of the joint]
Similar to the first embodiment, the joint 5 of the second embodiment is also mounted on the vehicle and is configured as a component for flowing the exhaust gas from the engine (see FIGS. 5 to 8). Specifically, the joint body 5 may be, for example, a member that constitutes a part of the exhaust manifold. Further, the joint body 5 is made of a metal such as a steel material as an example, as in the first embodiment.

The joint body 5 includes an outer shell member 6 and first and second tubular members 7 and 8.
The outer shell member 6 is a tubular member that surrounds the internal space 63. As an example, the cross section of the outer shell member 6 orthogonal to the extension direction is substantially elliptical. Hereinafter, the virtual plane including the minor axis of the cross section will be referred to as the minor axis surface 64, and the virtual plane including the major axis of the cross section will be referred to as the major axis surface 65 (see FIG. 7).

Further, the outer shell member 6 is provided with two protrusions 62 that protrude toward the internal space 63. These protrusions 62 are groove-shaped portions of the outer shell member 6 that are curved so as to project toward the internal space 63, and extend in the extending direction of the outer shell member 6. These protrusions 62 are provided at positions intersecting the minor axis surface 64 of the outer shell member 6, and face each other with the internal space 63 interposed therebetween.

The first and second tubular members 7 and 8 are provided so as to project from the opening 60 of the outer shell member 6, and these members are arranged so as to cover the opening 60. Specifically, the first tubular member 7 is arranged on one side of the minor axis surface 64 in the opening 60, and the second tubular member 8 is located on the other side of the minor axis surface 64 in the opening 60. It is placed in the part where it is located. Further, the first and second tubular members 7 and 8 extend along the extension direction of the outer shell member 6, and the cross section orthogonal to the extension direction is substantially semicircular.

The first tubular member 7 includes a base 70 and first and second joints 71 and 72.
The base 70 is a wall-shaped portion that forms a substantially arc-shaped portion in a substantially semicircular cross section of the first tubular member 7.

On the other hand, the substantially linear portion in the cross section of the first tubular member 7 forms the first and second joint portions 71 and 72. Specifically, in the substantially linear portion, the portion located on one side of the long axis surface 65 corresponds to the first joint portion 71, and the portion located on the other side corresponds to the second joint portion 72. do.

That is, in the cross section of the first tubular member 7, the first joint portion 71 protrudes from the first end of the base portion 70, and the second joint portion 72 protrudes from the second end of the base portion 70. That is, the base 70 and the first and second joints 71 and 72 are arranged so as to spread in the circumferential direction, and the first and second joints 71, from each of both ends of the base 70 in the circumferential direction. 72 protrudes.

Further, the first tubular member 7 is formed by, for example, deforming a pipe or deforming a flat plate material into a cylindrical shape by press molding or the like. Therefore, a curved portion 73 is formed at the boundary portion between each of the first and second joint portions 71 and 72 and the base portion 70 (in other words, the root portion of each joint portion).

On the other hand, the second tubular member 8 is configured in the same manner as the first tubular member 7, and includes a base 80 and first and second joints 81 and 82. Further, similarly to the first tubular member 7, in the second tubular member 8, a curved portion 83 is formed at the boundary portion between each of the first and second joint portions 81 and 82 and the base portion 80.

[4. Manufacturing method of the joint]
Similar to the first embodiment, the method for manufacturing the joined body 5 includes a forming step, an arrangement step, and a welding step. Each step will be described below.

(1) Forming Step In the forming step, a plurality of members including the outer shell member 6 constituting the joint body 5 and the first and second joint members 7 and 8 are formed. Specifically, these members may be formed by deforming a flat plate material by, for example, press molding or the like.

Each protrusion 62 in the outer shell member 6 is generated in the process of forming the outer shell member 6 in the forming step. That is, each protrusion 62 is formed by pressing and deforming a plate material (in other words, a material) used for forming the outer shell member 6.

(2) Arrangement Step In the arrangement step, the outer shell member 6 and the first and second tubular members 7 and 8 are arranged in contact with each other (see FIGS. 5 to 7). In the abutting state, the first and second tubular members 7 and 8 are arranged so as to protrude from the opening 60 of the outer shell member 6. At this time, the opening 60 is covered with the openings of the first and second tubular members 7, 8.

Specifically, in the abutting state, the first tubular member 7 is arranged on one side of the minor axis surface 64 in the opening 60 so that the base 70 abuts on the inner peripheral surface of the outer shell member 6. NS. Further, in the contact state, the second tubular member 8 is arranged on the other side of the minor axis surface 64 so that the base 80 abuts on the inner peripheral surface of the outer shell member 6. That is, the bases 70 and 80 of the first and second tubular members 7 and 8 are arranged along the inner peripheral surface of the outer shell member 6. At this time, the first and second joints 71 and 72 of the first tubular member 7 project from both ends of the base 70 toward the internal space 63, and the first and second joints 81 and 82 of the second tubular member 8 Projects from both ends of the base 80 toward the internal space 63.

Further, in the contact state, the first joint portion of each of the tubular members 7 and 8 and the second joint portion of the other split member are in contact with each other, and the curved portions 73 and 83 of the two joint portions that are in contact with each other. Face each other to form a gap 50. In the second embodiment, since the two tubular members 7 and 8 are used, two gaps 50 are formed. Further, in the contact state, the two protrusions 62 formed on the inner peripheral surface of the outer shell member 6 are arranged in the respective gaps 50 (see FIGS. 5 to 7).

(3) Welding Step In the welding step, the outer shell member 6 arranged in the contact state and the first and second tubular members 7 and 8 are joined by welding. Specifically, in the welding step, along the welding line 110 extending along the boundary between the edge portion 61 surrounding the opening 60 in the outer shell member 6 and the outer peripheral surfaces of the first and second annular members 7 and 8. Welding is performed (see FIG. 7). The welding line 110 passes through each protrusion 62 of the outer shell member 6 arranged in each gap 50 between the first and second joints (see FIG. 8). That is, in the welding step, while passing through each protrusion 62, welding is performed from the boundary between one of the two tubular members adjacent to the protrusion 62 and the edge 61 to the boundary between the other and the edge 61. Will be done.

[5. About modification]
In the joint body 1 of the first embodiment, each protrusion 43 on the outer peripheral surface of the edge portion 42 of the cap 4 is formed by pressing and deforming the plate material used for forming the cap 4. However, the protrusion 44 may be formed by joining a member other than the cap 4 to the outer peripheral surface of the edge 42 (see FIGS. 9 and 10). The protrusion 44 may be joined to the outer peripheral surface of the edge 42 by, for example, welding or caulking.

In FIGS. 9 and 10, as an example, the protrusion 44 is formed by a rectangular parallelepiped member, but the protrusion 44 may be formed by a member having another shape. Specifically, the protrusion 44 may be formed by a member having a shape corresponding to the shape of the gap 13 formed in the first and second flanges that are in contact with each other.

Further, also in the joint body 5 of the second embodiment, similarly, a protrusion 66 is formed by attaching a member different from the outer shell member 6 to the edge portion 61 of the opening 60 in the outer shell member 6. Is also good (see FIG. 11).

By doing so, the protrusions 44 and 66 are formed by the members having shapes corresponding to the shapes of the first and second flange portions and the gaps 13 and 50 formed in the first and second joint portions. be able to. Therefore, the gaps 13 and 50 can be closed better, and welding defects can be further suppressed.

[6. effect]
(1) According to the first embodiment, in the contact state in the arrangement step, the protrusions of the cap 4 are formed in the gaps 13 formed in the contacted first and second flange portions 21, 22, 31, and 32. 43 and 44 are arranged. Therefore, in the welding step, when welding is performed across the curved portions 23 and 33 of the first and second flange portions that are in contact with each other, it is possible to prevent the melt-off from occurring in the vicinity of the curved portions. Further, during the welding, it is possible to prevent spatter from entering the gap 13 and leaving foreign matter inside the bonded body 1. Therefore, welding defects can be suppressed.

(2) Further, according to the second embodiment, in the contact state in the arrangement step, the outer shell member 6 is formed in the gap 50 formed in the contacted first and second joint portions 71, 72, 81, 82. The protrusions 62 and 66 of the above are arranged. Therefore, in the welding step, when welding is performed across the curved portions 73 and 83 of the first and second joints that are in contact with each other, it is possible to prevent the melt-down from occurring in the vicinity of the curved portions. Further, during the welding, it is possible to prevent spatter from entering the gap 50 and leaving foreign matter inside the joint body 5. Therefore, welding defects can be suppressed.

(3) Further, according to the first and second embodiments, the protrusions 43 and 62 of the cap 4 and the outer shell member 6 are deformed by pressing the materials constituting these members in the forming step. It is formed. Therefore, the protrusion can be easily formed.

(4) Further, the joints 1 and 5 are configured as parts for flowing down the exhaust gas of the vehicle. As a result, it is possible to prevent spatter from entering the gaps 13 and 50 of the first and second flange portions and the first and second joint portions that are in contact with each other, and as a result, foreign matter remains inside the component. Can be suppressed. Therefore, it is possible to suppress the generation of abnormal noise while the vehicle is running.

[7. Other embodiments]
(1) In the first embodiment, the outer shell member 10 is formed of two first and second divided members 2 and 3. However, the outer shell member 10 may be formed of M (M is an integer of 3 or more) divided members. Further, M protrusions may be formed on the edge 42 of the cap 4. In this case, in the arrangement step, the M dividing members and the caps 4 are arranged in contact with each other in the same manner as in the first embodiment.

That is, in the abutting state, the base of each dividing member arranged so as to form the outer shell member 10 surrounds the internal space 12, and the flanges of the dividing members 2 and 3 are outside the internal space 12. Protrude toward. Further, in the abutting state, the first flange portion of each dividing member abuts on the second flange portion of the other dividing member adjacent to one side of the dividing member, and the second flange portion of each dividing member is abutted. It abuts on the first flange portion of another dividing member adjacent to the other side of the dividing member. Then, when the curved portions of the two flange portions that are in contact with each other face each other, M gaps are formed. Further, in the contact state, the M protrusions of the edge portion 42 of the cap 4 are arranged in the respective gaps, respectively.

Then, in the welding step, as in the first embodiment, the cap 4 extends along the boundary between the edge portion 42 and the edge portion surrounding the opening 11 in the outer shell member 10 formed by the M divided members, and each extends. Welding may be performed along the welding line passing through the protrusion.

Even when having such a configuration, the same effect can be obtained.
(2) In the second embodiment, the opening 60 of the outer shell member 6 is provided with two first and second tubular members 7, 8. However, M tubular members may be provided in the opening 60 of the outer shell member 6. Further, M protrusions may be formed on the edge 61 of the opening 60 of the outer shell member 6. In this case, in the arrangement step, the M divided members and the outer shell member 6 are arranged in contact with each other in the same manner as in the second embodiment.

That is, in the abutting state, each tubular member is arranged so as to protrude from the opening 60 of the outer shell member 6, and the opening 60 is covered by the opening of these tubular members. Further, in the abutting state, the base portion of each tubular member is arranged along the inner peripheral surface of the outer shell member 6, and the first and second joint portions of each tubular member are directed from both ends of the base portion toward the internal space 63. Protruding.

Further, in the contact state, the first joint of each tubular member is in contact with the second joint of another tubular member adjacent to one side of the tubular member, and the second joint of each tubular member is abutted. It abuts on the first flange portion of another tubular member adjacent to the other side of the tubular member. Then, the curved portions of the two abutting joints face each other to form M gaps. Further, in the abutting state, M protrusions at the edge 61 of the opening 60 of the outer shell member 6 are arranged in each gap.

Then, in the welding step, as in the second embodiment, along the welding line extending along the boundary between the edge 61 of the opening 60 of the outer shell member 6 and the M tubular members and passing through each protrusion. , Welding may be performed.

Even when having such a configuration, the same effect can be obtained.
(3) The joints 1 and 5 of the first and second embodiments are configured as parts for flowing down the exhaust gas of the vehicle. However, the conjugates 1 and 5 may be used for other purposes.

(4) The cap 4 may be composed of a plurality of divided members, and the outer shell member 10 configured as a connecting member may be joined to the outer periphery of the cap 4. In this case, two flange portions are formed on each of the dividing members constituting the cap 4, and the cap 4 is formed by joining the flange portions of the dividing members to each other. Further, a plurality of protrusions are formed on the outer shell member 10, and welding is performed in a state where the protrusions are arranged in a gap between the joined flanges in the same manner as in the above embodiment.

(5) A plurality of functions possessed by one component in the above embodiment may be realized by a plurality of components, or one function possessed by one component may be realized by a plurality of components. .. Further, a plurality of functions possessed by the plurality of components may be realized by one component, or one function realized by the plurality of components may be realized by one component. Further, a part of the configuration of the above embodiment may be omitted. In addition, at least a part of the configuration of the above embodiment may be added or replaced with the configuration of the other above embodiment.

[8. Correspondence of wording]
The cap 4 and the outer shell member 6 correspond to an example of the connecting member. Further, the first and second flange portions 21, 22, 31, and 32 correspond to an example of the first or second flange portion.

1 ... Joined body, 10 ... Outer shell member, 11 ... Opening, 12 ... Internal space, 13 ... Gap, 2 ... First dividing member, 20 ... Base, 21 ... First flange part, 22 ... Second flange part, 23 ... Curved part, 3 ... 2nd dividing member, 30 ... Base part, 31 ... 1st flange part, 32 ... 2nd flange part, 33 ... Curved part, 4 ... Cap, 40 ... Main body part, 43, 44 ... Protruding part, 5 ... Joined body, 50 ... Gap, 6 ... Outer shell member, 60 ... Opening, 62, 66 ... Projection, 63 ... Internal space, 7, 8 ... First and second tubular members, 70, 80 ... Base, 71 , 81 ... 1st joint, 72, 82 ... 2nd joint, 73, 83 ... Curved part, 100 ... Weld line, 110 ... Weld line.

Claims (8)

A method for manufacturing a joined body having a first divided member, a second divided member, and a connecting member.
The first dividing member has a first base portion and a first joint portion provided at an end of the first base portion.
The second dividing member has a second base portion and a second joint portion provided at an end of the second base portion.
The connecting member has a protrusion and has a protrusion.
In a state where the first joint portion and the second joint portion are in contact with each other and the protrusion is inserted between the first division member and the second division member, the first division member and the first division member are described. A method for manufacturing a joint in which the second dividing member and the protrusion are welded. The first and second dividing members are two dividing members having a base portion and a joint portion protruding from the end of the base portion and having a curved portion formed at a portion forming a boundary between the base portion and the joint portion. A method for manufacturing a joint having a joint member and a coupling member.
In the abutting state, the first and second dividing members and the connecting member are arranged, and in the abutting state, the joint portions of the first and second dividing members are in contact with each other, and these The curved portions of the joints face each other to form a gap, and the coupling member is in contact with the bases of the first and second dividing members, and is formed in the coupling member in the gap. The protrusions are arranged,
The first and second dividing members arranged in the contacted state and the connecting member are joined by welding.
In the joining, a method for manufacturing a joined body in which welding is performed from the boundary between the first dividing member and the joining member to the boundary between the second dividing member and the joining member while passing through the protrusion. The method for manufacturing a bonded body according to claim 2.
The split member has two joints, first and second joints, provided at both ends of the base.
The joint has N (N is an integer of 2 or more) of the dividing member and N of the connecting members on which the protrusions are formed.
In the contact state, the N split members and the coupling members are arranged, and in the contact state, the first joint portion of each of the split members and the second joint of the other split members are joined. The portions are in contact with each other, and the curved portion of the first joint portion and the curved portion of the second joint portion face each other to form the gap, and the connecting member is a member of each of the divided members. In addition to being in contact with the base portion, each of the above-mentioned protrusions is arranged in each of the above-mentioned gaps.
The N split members and the coupling members arranged in the contact state are joined by welding.
In the joining, welding is performed from the boundary between one of the two dividing members adjacent to the protrusion and the connecting member to the boundary between the other and the connecting member while passing through each of the protrusions. Method of manufacturing a joint. The method for manufacturing a bonded body according to claim 3.
The joint is
The outer shell member that surrounds the internal space and
A cap that closes the opening of the outer shell member and
Have,
The outer shell member has N of the divided members.
The cap is configured as the connecting member and
The first and second joints are flange-shaped portions protruding from both ends of the base portion.
In the abutting state, each of the divided members is further arranged so that the base portion surrounds the internal space and each of the joint portions protrudes toward the outside of the internal space. A method for manufacturing a joint in which an outer shell member is formed and the cap is arranged so as to cover an opening of the outer shell member. The method for manufacturing a bonded body according to claim 3.
The joint is
The outer shell member that surrounds the internal space and
N tubular members that protrude from the opening of the outer shell member and are provided so as to cover the opening.
Have,
The outer shell member is configured as the connecting member, and a plurality of the protrusions are formed on the inner peripheral surface of the outer shell member.
Each of the tubular members is configured as the divided member, and a part of the tubular member forms the base portion, and each portion of the tubular member protruding from both ends of the base portion is the first and the above. Form a second joint,
In the abutting state, each of the tubular members has a base portion along the inner peripheral surface of the outer shell member, and the first and second joint portions project toward the internal space. A method of manufacturing a joint that is arranged in such a manner. The method for manufacturing a bonded body according to any one of claims 1 to 5.
A method for manufacturing a bonded body, wherein the protrusion is formed by pressing and deforming a material constituting the connecting member. The method for manufacturing a bonded body according to any one of claims 1 to 5.
A method for manufacturing a joined body, wherein the protrusion is formed by joining another member to the joining member. The method for manufacturing a bonded body according to any one of claims 1 to 7.
The joint is a method for manufacturing a joint, which is a component that allows exhaust gas from a vehicle to flow down.

Images