JP2020069485A - Brazing and fixing method, manufacturing method of structure, and fixing structure - Google Patents

Abstract

To provide a technique for improving positioning accuracy of a pair of metal members in a brazing and fixing method for fixing the pair of metal members mutually by brazing.SOLUTION: A brazing and fixing method for fixing a pair of metal members includes: a process of preparing a fixing and brazing filler material which disperses on the metal member and adheres to the metal member, and a support metal material containing metal powder; an engagement part forming process of forming an engagement part by arranging at least one of the fixing and brazing filler material and the support metal material on the one metal member out of the pair of metal members; an engaged part forming process of forming an engaged part by arranging at least the other of the fixing and brazing filler material and the support metal material on the other metal member out of the pair of metal members; and a fixing process of fixing the pair of metal members mutually by melting the fixing and brazing filler material contained in an engagement body of the engagement part and the engaged part and impregnating the support metal material with it in a state that the pair of metal members are arranged so as to engage the engagement part and the engaged part.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a brazing fixing method, a structure manufacturing method, and a fixing structure.

  Conventionally, there is known a brazing fixing method of fixing a pair of metal members to each other by brazing. For example, in Patent Document 1, a composite brazing material formed of a brazing material for brazing a pair of metal members and an aggregate of metal powders capable of eutectic reaction with the brazing material is used to form a pair of metals. A technique of fixing one metal member of the members to the other metal member by brazing is disclosed.

JP, 2015-111622, A

  The composite brazing material described in Patent Document 1 is provided on one metal member. When manufacturing a structure in which a pair of metal members are fixed to each other using the composite brazing material described in Patent Document 1, one metal member provided with the composite brazing material and the other metal member are provided in a predetermined manner. The composite brazing material is heated after facing each other in a positional relationship. At this time, the joining brazing material contained in the composite brazing material is melted, so that the position of one metal member may be displaced with respect to the other metal member. Therefore, the positioning accuracy of the pair of metal members may decrease.

  The present invention has been made to solve the above problems, and provides a technique for improving the positioning accuracy of a pair of metal members in a brazing fixing method for fixing a pair of metal members to each other by brazing. The purpose is to

  The present invention has been made to solve at least a part of the problems described above, and can be realized as the following modes.

  (1) According to one aspect of the invention, there is provided a brazing fixing method for fixing a pair of metal members to each other by brazing. The brazing fixing method includes a step of preparing a fixing brazing material that diffuses into the metal member and is fixed to the metal member, a supporting metal material containing metal powder, the fixing brazing material, and the supporting metal material. An engaging portion forming step of forming an engaging portion by arranging at least one of the pair of metal members on one of the pair of metal members, the fixing brazing material, and at least the other of the supporting metal material to the pair of metal members. The engaged portion forming step of forming the engaged portion by arranging it on the other metal member of the metal members, and the pair of metals so that the engaging portion and the engaged portion engage with each other. With the members arranged, the pair of metal members are fixed to each other by melting the fixing brazing material contained in the engaging body of the engaging portion and the engaged portion and impregnating the supporting metal material. And a fixing step.

  According to this configuration, when the one metal member is positioned with respect to the other metal member in the fixing step, the engaging portion arranged on the one metal member and the target member arranged on the other metal member. Engage with the engaging portion. As a result, when the fixing brazing material is melted, the one metal member and the other metal member are fixed in a state where the engaging portion and the engaged portion are engaged with each other. Therefore, it is possible to prevent the displacement of one metal member with respect to the other metal member, so that the positioning accuracy of the pair of metal members can be improved.

  (2) In the brazing / fixing method of the above aspect, in the engaging portion forming step, a recess is formed in the engaging portion using at least one of the fixing brazing material and the supporting metal material, and the engaged portion is engaged. In the joining portion forming step, a convex portion is formed on the engaged portion using at least the other of the fixing brazing material and the supporting metal material, and in the fixing step, the concave portion and the convex portion are engaged with each other. By doing so, the pair of metal members may be positioned. According to this configuration, when positioning one metal member with respect to the other metal member, the convex portion of the engaged portion is inserted into the concave portion of the engaging portion, so that the engaging portion and the engaged portion are separated from each other. The degree of close contact between the engaging portion and the engaged portion when engaging is increased. With this, it is possible to increase the degree of adhesion between one metal member and the other metal member when the pair of metal members are fixed to each other.

  (3) In the brazing fixing method of the above aspect, even if the total volume of the fixing brazing filler metal contained in the engagement body is twice or more the total volume of the supporting metal material contained in the engagement body. Good. According to this structure, the fixing brazing material, the supporting metal material, and the metal member can be reliably bonded by the eutectic reaction, so that the one metal member and the other metal member can be more firmly joined. ..

  (4) In the brazing fixing method of the above aspect, in the engaging body, the engaging portion may be restricted from moving in at least two directions orthogonal to each other by the engaged portion. With this configuration, the degree of freedom of relative movement between the one metal member and the other metal member can be reduced, and thus the positioning accuracy of the pair of metal members can be further improved.

  (5) In the brazing fixing method according to the above aspect, at least one of the one metal member and the other metal member is formed in a tubular shape, and at least one of the engaging portion and the engaged portion. May be formed on a curved surface. With this configuration, it is possible to accurately fix a tubular metal member that is difficult to perform positioning because it is formed of a curved surface.

  (6) According to another aspect of the present invention, there is provided a method of manufacturing a structure including a pair of metal members and a fixing portion that fixes the pair of metal members to each other. A method of manufacturing a structure, a step of preparing a fixing brazing material that is diffused into the metal member and fixed to the metal member, a supporting metal material containing metal powder, the fixing brazing material, and the supporting metal material. At least one of the pair of metal members is disposed in one metal member of the pair of metal members to form an engagement portion, the fixing brazing material, and at least the other of the supporting metal material The engaged portion forming step of forming the engaged portion by arranging it on the other metal member of the pair of metal members, and the pair of the pair of engaging members so that the engaging portion and the engaged portion engage with each other. A fixing portion that forms the fixing portion by melting the fixing brazing material included in the engaging body of the engaging portion and the engaged portion and impregnating the supporting metal material with the metal member arranged. And a forming step. With this configuration, it is possible to manufacture a structure in which the relative positions of the pair of metal members are adjusted with high accuracy.

  (7) According to still another aspect of the present invention, there is provided a fixing structure used for fixing a pair of metal members to each other by brazing. The fixing structure is at least one of a fixing brazing material that diffuses into the metal member and is fixed to the metal member, and a supporting metal material containing metal powder, and is provided on one metal member of the pair of metal members. An engaging portion arranged, at least the fixing brazing material, and the supporting metal material, and an engaged portion arranged on the other metal member of the pair of metal members. The engaging portion and the engaged portion are formed to be engageable with each other. According to this structure, the relative position of the pair of metal members can be set with high accuracy by the fixing structure.

It is a schematic diagram which shows the structure before manufacture of the structure of 1st Embodiment. It is a flowchart of the brazing fixing method of 1st Embodiment. It is a schematic diagram explaining the brazing fixing method of 1st Embodiment. It is a schematic diagram of the structure of 1st Embodiment. It is a schematic diagram explaining the brazing fixing method of 2nd Embodiment. It is a schematic diagram explaining the brazing fixing method of 3rd Embodiment. It is a schematic diagram explaining the brazing fixing method of 4th Embodiment. It is a schematic diagram explaining the brazing fixing method of 5th Embodiment. It is a schematic diagram explaining the brazing fixing method of 6th Embodiment. It is a schematic diagram explaining the brazing fixing method of 7th Embodiment. It is a schematic diagram explaining the brazing fixing method of 8th Embodiment. It is a schematic diagram explaining the brazing fixing method of 9th Embodiment. It is a schematic diagram explaining the brazing fixing method of 10th Embodiment. It is a schematic diagram explaining the brazing fixing method of 11th Embodiment. It is a schematic diagram explaining the fixing structure of the modification of 7th Embodiment. It is a schematic diagram explaining the fixing structure of another modification of 7th Embodiment. It is a schematic diagram explaining the fixing structure of another modification of 7th Embodiment.

<First Embodiment>
FIG. 1 is a schematic diagram showing a structure before manufacturing of a structure 10 (brazing structure) of the first embodiment. FIG. 2 is a flowchart of the brazing fixing method of the first embodiment. FIG. 3 is a schematic diagram illustrating the brazing fixing method of the first embodiment. FIG. 4 is a schematic diagram of the structure 10 according to the first embodiment. In the brazing fixing method of the first embodiment, the structure 10 is manufactured by fixing the pair of metal members 11 and 12 shown in FIG. 1 to each other by brazing.

As shown in FIG. 2, the brazing fixing method of the present embodiment includes a preparing step, an engaging portion forming step, an engaged portion forming step, and a fixing step.
In the preparation step (S11), the metal members 11 and 12 used in the subsequent engaging portion forming step and engaged portion forming step, the metal sheet material functioning as the engaging portion 21, and the engaged portion 22 are used. Prepare a functional brazing filler metal. The metal members 11 and 12 are flat plate-shaped members and are made of, for example, stainless steel.

  The engagement portion 21 is formed by forming an aggregate of metal powder into a sheet shape, and specifically, mixes the metal powder and a binder for adhering the powders of the metal powder, for example, an organic solvent. It is a sheet-shaped member that is dried to have a constant thickness. In the present embodiment, the engagement portion 21 is formed to have a rectangular ring shape as shown in FIGS. 1 (a) and 3 (a). As the metal powder, a powder of stainless steel which is the same material as the metal member 11 and having a particle size of 10 to 45 μm is used. As the binder, one that evaporates at a temperature equal to or lower than the temperature in the heating furnace in the fixing step described later is used.

  The engaged portion 22 is a material that diffuses into the metal members 11 and 12 and can be fixed to the metal members 11 and 12. Specifically, the engaged portion 22 has a low melting point with respect to the material forming the metal members 11 and 12, and is a material capable of eutectic reaction with the material forming the metal members 11 and 12, such as nickel. It is formed from a base brazing material, an iron base brazing material, a silver base brazing material, and a titanium base brazing material. In the present embodiment, as shown in FIG. 3A, the engaged portion 22 has the same volume as the engaging portion 21 and is formed in a rectangular ring shape.

  In the engaging portion forming step (S12), the engaging portion 21 is formed on the flat surface 13 of the metal member 11. Specifically, as shown by a white arrow F21 in FIG. 1A, the engaging portion 21 is brought close to the metal member 11 from the flat surface 13 side of the metal member 11, and the engaging portion 21 is placed on the flat surface 13. To place. As a result, the metal member 11 and the engaging portion 21 are in a state as shown in FIG. In the present embodiment, the engaging portion 21 is provided along the outer edge of the metal member 11 on the plane 13 of the metal member 11 as shown in FIG. The metal member 11 with the engaging portion 21 arranged at a predetermined position is referred to as a combination member 16.

  In the engaged portion forming step (S13), the engaged portion 22 is formed on the flat surface 14 of the metal member 12. Specifically, as shown by the white arrow F22 in FIG. 1A, the engaged portion 22 is brought closer to the metal member 12 from the flat surface 14 side of the metal member 12, and the flat surface 14 is engaged. The part 22 is arranged. As a result, the metal member 12 and the engaged portion 22 are in a state as shown in FIG. In the present embodiment, the engaged portion 22 is formed to be slightly smaller than the engaging portion 21, as shown in FIG. Specifically, when fixing the pair of metal members 11 and 12 to each other, the engaged portion 22 is formed so that the outer peripheral surface 24 can contact the inner peripheral surface 23 of the engaging portion 21. The metal member 12 in which the engaged portion 22 is arranged at a predetermined position is referred to as a combination member 17.

  Next, in the fixing step (S14), the pair of metal members 11 and 12 are fixed to each other. Specifically, the combination member 16 and the engaging member 21 are engaged with the outer peripheral surface 24 of the engaged portion 22 so that the engaging portion 21 and the engaged portion 22 are engaged with each other. The combination member 17 is arranged. As a result, the combination member 16 and the combination member 17 are brought into the state shown in FIG. 3C, and the engagement body 20 of the engagement portion 21 and the engagement portion 22 is formed. Then, the engaged portion 22 is melted by a heating furnace (not shown). The temperature in the heating furnace is set to, for example, 1100 ° C. so that the engaged portion 22 melts but the metal members 11 and 12 do not melt.

  When the engaged portion 22 is melted in the fixing process, the engaged portion 22 formed of the molten fixing brazing material is sucked into the engaging portion 21 formed of metal powder. As a result, the engaged portion 22 is impregnated into the engaging portion 21, and the surface of the metal powder and the fixing brazing material undergo a eutectic reaction.

  Further, the engaged portion 22 impregnated in the engaging portion 21 diffuses at the bonding interface with the metal members 11 and 12, and undergoes a eutectic reaction with the metal members 11 and 12. After that, by cooling the engaged portion 22 with which the engaging portion 21 is impregnated together with the metallic members 11 and 12, the metallic member 11 and the metallic member 12 are fixed by brazing. Thereby, the structure 10 including the metal members 11 and 12 and the fixing portion 15 generated from the engaging body 20 is manufactured (see FIG. 3D). At this time, the distance between the plane 13 of the metal member 11 and the plane 14 of the metal member 12 in the structure 10 is determined by the distance of the engaging portion 21 arranged on the plane 13 of the metal member 11 in the first arrangement step. It will be the same as the thickness.

  As shown in FIG. 4, the structure 10 manufactured by the brazing fixing method according to the present embodiment includes a pair of metal members 11 and 12 and a fixing portion 15. As shown in FIG. 4B, which is a cross-sectional view taken along the line AA of FIG. 4A, the metal members 11 and 12 are fixed by the fixing portion 15 to the flat surface 13 of the metal member 11 and the flat surface 14 of the metal member 12. And are fixed to each other so that they face each other.

  According to the brazing / fixing method of the present embodiment described above, when the metal member 11 is positioned with respect to the metal member 12 in the fixing step, the engaging portion 21 disposed on the metal member 11 and the metal member It engages with the engaged portion 22 arranged in 12. When the engaged portion 22 formed of the fixing brazing material melts, the metal member 11 and the metal member 12 are fixed to each other with the engaging portion 21 and the engaged portion 22 engaged with each other. .. In addition, the engagement portion 21 formed of metal powder serves as a pillar that makes the distance between the two metal members 11 and 12 a predetermined distance between the metal member 11 and the metal member 12. As a result, the positional deviation of the metal member 11 with respect to the metal member 12 can be prevented, so that the positioning accuracy of the pair of metal members 11, 12 can be improved.

  Further, according to the brazing / fixing method of the present embodiment, a means for positioning the metal member 11 with respect to the metal member 12 is not required in the fixing step, so that the manufacturing cost of the structure 10 can be reduced. it can.

  Further, according to the brazing fixing method of the present embodiment, before brazing the metal member 11 and the metal member 12, the metal sheet material is quantitatively arranged as the engaging portion 21 on the metal member 11, A fixing brazing material is quantitatively arranged as the engaged portion 22 on the unit 12. Thereby, the metal member 11 and the metal member 12 can be fixed to each other in a necessary amount, so that the amount of the material used for fixing the pair of metal members 11 and 12 can be reduced and the pair of metal members 11 and 12 can be reduced. It is possible to increase the degree of adhesion between the metal member 11 and the metal member 12 when they are fixed to each other.

  Further, according to the brazing / fixing method of the present embodiment, since the thickness of the engaging body 20 can be optimized, the composition of the fixing brazing material at the bonding interface can be sufficiently diffused, and the eutectic structure can be formed. Can be controlled. Further, by ensuring the proper thickness of the engaging body 20, the brazing filler metal of the engaged portion 22 and the metal members 11 and 12 can be surely caused to undergo the eutectic reaction within the area of the bonding interface.

  Further, according to the brazing / fixing method of the present embodiment, when the metal member 11 and the metal member 12 are arranged in the fixing step, the inner peripheral surface 23 of the engagement portion 21 formed in an annular shape and the engaged member 21 are engaged. The outer peripheral surface 24 of the portion 22 is brought into contact. As a result, the engaged portion 22 is surrounded by the engaging portion 21, so that the metal member 11 and the metal member 12 are separated from each other in the direction in which the engaged portion 22 is surrounded by the engaging portion 21, specifically, in the plane. Movement on 14 at least in two directions orthogonal to each other is restricted. Thereby, the positioning accuracy of the pair of metal members 11 and 12 can be further improved.

<Second Embodiment>
FIG. 5 is a schematic diagram illustrating the brazing fixing method of the second embodiment. The brazing fixing method of the second embodiment differs from the brazing fixing method of the first embodiment (FIG. 3) in the shapes of the engaging portion and the engaged portion.

  The engaging body 25 of the present embodiment is formed by engaging the engaging portion 26 and the engaged portion 27. The engaging portion 26 is provided on the metal member 11, and the engaged portion 27 is provided on the metal member 12.

  As shown in FIG. 5 (a), the engaging portion 26 has metal sheet materials 26 a and 26 b formed in a rectangular ring shape, and a fixing brazing member formed in a rectangular ring shape. And a material 26c. The metal sheet material 26 a is provided along the outer edge of the metal member 11 on the flat surface 13 of the metal member 11. The metal sheet material 26b is provided inside the metal sheet material 26a on the plane 13 of the metal member 11. The fixing brazing material 26c is provided between the metal sheet material 26a and the metal sheet material 26b on the flat surface 13 of the metal member 11. The fixing brazing material 26c is thinner than the metal sheet materials 26a and 26b. As a result, as shown in FIG. 5B, the engaging portion 26 has a concave sectional shape. The metal member 11 with the engaging portion 26 arranged at a predetermined position is referred to as a combination member 16.

  As shown in FIG. 5 (a), the engaged portion 27 is a fixing brazing material formed into a rectangular ring shape, and in the present embodiment, as shown in FIG. 5 (b). It is provided on the flat surface 14 of the metal member 12, and is formed in a convex shape so as to project from the flat surface 14. The metal member 12 in which the engaged portion 27 is arranged at a predetermined position is referred to as a combination member 17.

  In this embodiment, when the combination member 16 and the combination member 17 are combined in the fixing step of the brazing fixing method, the engaged portion 27 is inserted into the gap 26d between the metal sheet material 26a and the metal sheet material 26b. The combination member 16 and the combination member 17 are arranged such that the engaged portion 27 contacts the fixing brazing material 26c (see FIG. 5C). After that, the fixing brazing material 26c of the engaging portion 26 and the engaged portion 27 are melted by a heating furnace, the metal member 11 and the metal member 12 are fixed by brazing, and the structure 10 is manufactured. As a result, in the present embodiment, the fixing portion 15 generated from the engaging body 25 is spaced by the width of the fixing brazing material 26c and the engaged portion 27, as shown in FIG. 5 (d). Two are arranged.

  According to the brazing / fixing method of the present embodiment described above, when the metal member 11 is positioned with respect to the metal member 12 in the fixing step, the convex engaged portion 27 becomes the concave engaging portion 26. Since it is inserted, the degree of contact between the engaging portion 26 and the engaged portion 27 becomes high. Thereby, the degree of adhesion between the metal member 11 and the metal member 12 when the pair of metal members 11 and 12 are fixed to each other can be increased.

<Third Embodiment>
FIG. 6 is a schematic diagram illustrating the brazing fixing method according to the third embodiment. The brazing fixing method of the third embodiment differs from the brazing fixing method of the first embodiment (FIG. 3) in the shapes of the engaging portion and the engaged portion.

  The engaging body 30 of the present embodiment is formed by engaging the engaging portion 31 and the engaged portion 32. The engaging portion 31 is provided on the metal member 11, and the engaged portion 32 is provided on the metal member 12.

  As shown in FIG. 6A, the engaging portion 31 has a metal sheet material 31a formed in a rectangular ring shape and a fixing brazing material 31b formed in a rectangular ring shape. It consists of and. The metal sheet material 31 a is provided along the outer edge of the metal member 11 on the plane 13 of the metal member 11. The fixing brazing material 31b is provided inside the metal sheet material 31a on the plane 13 of the metal member 11. The fixing brazing material 31b is thinner than the metal sheet material 31a. As a result, as shown in FIG. 6B, the engaging portion 31 has a step-like cross-sectional shape in which the height decreases from the outer side to the inner side of the metal member 11. The metal member 11 with the engaging portion 31 arranged at a predetermined position is referred to as a combination member 16.

  As shown in FIG. 6A, the engaged portion 32 has a metal sheet material 32a formed in a rectangular ring shape and a fixing brazing material formed in a rectangular ring shape. 32b and. The metal sheet material 32 a is provided along the outer edge of the metal member 12 on the flat surface 14 of the metal member 12. The fixing brazing material 32b is provided inside the metal sheet material 32a on the plane 14 of the metal member 12. The thickness of the fixing brazing material 32b is thicker than the thickness of the metal sheet material 32a. As a result, as shown in FIG. 6B, the engaged portion 32 has a step-like cross-sectional shape in which the height increases from the outer side to the inner side of the metal member 12. The metal member 12 in which the engaged portion 32 is arranged at a predetermined position is referred to as a combination member 17.

  In this embodiment, when the combination member 16 and the combination member 17 are combined in the fixing step of the brazing fixing method, as shown in FIG. 6C, the inner peripheral surface of the metal sheet material 31a and the fixing brazing material 32b are separated. The combination member 16 and the combination member 17 are arranged so as to contact the outer peripheral surface. After that, the fixing brazing materials 31b and 32b are melted by a heating furnace, and the metal member 11 and the metal member 12 are fixed by brazing to manufacture the structure 10. As a result, in the present embodiment, as shown in FIG. 6D, the two fixing portions 15 generated from the engaging body 30 are arranged so that the metal member 11 and the metal member 12 are arranged side by side in the facing direction. It is provided.

  According to the brazing fixing method of the present embodiment described above, in the fixing step, the engaging portion 31 and the engaged portion 31 are engaged so that the inner peripheral surface of the metal sheet material 31a and the outer peripheral surface of the fixing brazing material 32b come into contact with each other. The mating portion 32 is engaged. When the fixing brazing material 31b of the engaging portion 31 and the fixing brazing material 32b of the engaged portion 32 are melted, the metal member 11 and the metal member 12 are engaged with each other by the engaging portion 31 and the engaged portion 32. They are fixed to each other in the same state. As a result, the positional deviation of the metal member 11 with respect to the metal member 12 can be prevented, so that the positioning accuracy of the pair of metal members 11, 12 can be improved.

<Fourth Embodiment>
FIG. 7 is a schematic diagram illustrating the brazing fixing method of the fourth embodiment. The brazing fixing method of the fourth embodiment differs from the brazing fixing method of the first embodiment (FIG. 3) in the volume ratio of the fixing brazing material to the metal sheet material.

  The engaging body 35 of the present embodiment is formed by engaging the engaging portion 21 and the engaged portion 37. The engaged portion 37 is provided on the metal member 12.

  The engaged portion 37 is a fixing brazing material, and in the present embodiment, as shown in FIG. 7A, is formed in a rectangular ring shape. The engaged portion 37 is provided on the flat surface 14 of the metal member 12 and is formed to be slightly smaller than the engaging portion 21 as shown in FIG. Specifically, when the metal member 11 and the metal member 12 are fixed to each other by using the engagement body 35, the engaged portion 37 has an outer peripheral surface 39 in contact with the inner peripheral surface 23 of the engaging portion 21. Has been formed. As shown in FIG. 7B, the engaged portion 37 has substantially the same height as the engaging portion 21 in the direction along the direction in which the metal member 11 and the metal member 12 face each other. It is formed so as to extend inside the metal member 12 along with and has a volume twice that of the engaging portion 21. The metal member 12 in which the engaged portion 37 is arranged at a predetermined position is referred to as a combination member 17.

  In this embodiment, when the combination member 16 and the combination member 17 are combined in the fixing step of the brazing fixing method, as shown in FIG. 7C, the inner peripheral surface 23 of the engagement portion 21 and the engaged portion 21 are engaged. The combination member 16 and the combination member 17 are arranged so that the outer peripheral surface 39 of 37 contacts. After that, the engaged portion 37 is melted by a heating furnace, the metal member 11 and the metal member 12 are fixed by brazing, and the structure 10 is manufactured. As a result, in the present embodiment, the fixing portion 15 generated from the engagement body 35 fixes the metal member 11 to the metal member 12 as shown in FIG.

  According to the brazing / fixing method of the present embodiment described above, in the fixing step, the fixing portion 15 for fixing the metal member 11 and the metal member 12 by the fixing brazing material having a volume twice that of the metal sheet material. Is generated. As a result, the eutectic reaction between the fixing brazing material, the metal sheet material, and the metal members 11 and 12 can be reliably performed, so that the metal member 11 and the metal member 12 can be joined more firmly.

<Fifth Embodiment>
FIG. 8 is a schematic diagram illustrating a brazing fixing method according to the fifth embodiment. The brazing / fixing method of the fifth embodiment differs from the brazing / fixing method of the first embodiment (FIG. 3) in the volume ratio of the brazing material to the metal sheet material.

  The engaging body 40 of the present embodiment is generated by engaging the engaging portion 41 and the engaged portion 42. The engaging portion 41 is provided on the metal member 11, and the engaged portion 42 is provided on the metal member 12.

  The engaging portion 41 is composed of a metal sheet material 41a formed in a rectangular ring shape and a fixing brazing material 41b formed in a rectangular ring shape. The metal sheet material 41 a is provided along the outer edge of the metal member 11 on the flat surface 13 of the metal member 11. The fixing brazing material 41b is provided inside the metal sheet material 41a on the plane 13 of the metal member 11. The fixing brazing material 41b has the same thickness as the metal sheet material 41a (see FIG. 8B). The metal member 11 with the engaging portion 41 arranged at a predetermined position is referred to as a combination member 16.

  The engaged portion 42 is a brazing filler metal, and in the present embodiment, as shown in FIG. 8A, is formed in a rectangular ring shape. The engaged portion 42 is provided on the flat surface 14 of the metal member 12, and is formed to be slightly smaller than the fixing brazing material 41b of the engaging portion 41, as shown in FIG. 8A. Specifically, when fixing the metal member 11 and the metal member 12 using the engaging body 40, the engaged portion 42 is formed such that the outer peripheral surface 44 contacts the inner peripheral surface 43 of the engaging portion 41. Has been done. The engaged portion 42 has the same volume as the volume of the fixing brazing material 41b. The metal member 12 in which the engaged portion 42 is arranged at a predetermined position is referred to as a combination member 17.

  In the present embodiment, when the combination member 16 and the combination member 17 are combined in the fixing step of the brazing fixing method, as shown in FIG. 8C, the inner peripheral surface 43 of the engaging portion 41 and the engaged portion are The combination member 16 and the combination member 17 are arranged so that the outer peripheral surface 44 of 42 contacts. After that, the fixing brazing material 41b and the engaged portion 37 are melted by a heating furnace, the metal member 11 and the metal member 12 are fixed by brazing, and the structure 10 is manufactured. Thereby, in the present embodiment, the fixing portion 15 generated from the engagement body 40 fixes the metal member 11 to the metal member 12 as shown in FIG.

  According to the brazing fixing method of the present embodiment described above, in the fixing step, the fixing portion 15 that fixes the pair of metal members 11 and 12 to each other by the fixing brazing material having the volume twice that of the metal sheet material 41a. Is generated. As a result, the eutectic reaction between the fixing brazing material, the metal sheet material 41a, and the metal members 11 and 12 can be reliably performed, so that the metal member 11 and the metal member 12 can be joined more firmly.

<Sixth Embodiment>
FIG. 9 is a schematic diagram illustrating a brazing fixing method according to the sixth embodiment. The brazing / fixing method of the sixth embodiment differs from the brazing / fixing method of the first embodiment (FIG. 3) in the volume ratio of the fixing brazing material to the metal sheet material.

  The engaging body 45 of the present embodiment is formed by engaging the engaging portion 21 and the engaged portion 47. The engaged portion 47 is provided on the metal member 12.

  The engaged portion 47 is a fixing brazing material, and in the present embodiment, as shown in FIG. 9A, is formed in a rectangular ring shape. The engaged portion 47 is provided on the flat surface 14 of the metal member 12, and is formed to be slightly smaller than the engaging portion 21 as shown in FIG. 9A. Specifically, when the pair of metal members 11 and 12 are fixed to each other using the engagement body 45, the engaged portion 47 is formed such that the outer peripheral surface 49 contacts the inner peripheral surface 23 of the engaging portion 21. Has been done. As shown in FIG. 9B, the engaged portion 47 has substantially the same length in the direction along the plane 14 as the engaging portion 21, but the metal member 11 and the metal member 12 face each other. The height in the direction along is higher than that of the engaging portion 21, and has a volume twice that of the engaging portion 21. The metal member 12 in which the engaged portion 47 is arranged at a predetermined position is referred to as a combination member 17.

  In the present embodiment, when the combination member 16 and the combination member 17 are combined in the fixing step of the brazing fixing method, as shown in FIG. 9C, the inner peripheral surface 23 of the engagement portion 21 and the engaged portion are The combination member 16 and the combination member 17 are arranged so that the outer peripheral surface 49 of 47 contacts. After that, the engaged portion 37 is melted by a heating furnace, the metal member 11 and the metal member 12 are fixed by brazing, and the structure 10 is manufactured. Thereby, in the present embodiment, the fixing portion 15 generated from the engagement body 45 fixes the metal member 11 to the metal member 12 as shown in FIG.

  According to the brazing / fixing method of the present embodiment described above, in the fixing step, the pair of metal members 11 and 12 are fixed by the fixing brazing material of the engaged portion 47 having a volume twice that of the engaging portion 21. The fixing part 15 for fixing each other is molded. As a result, the eutectic reaction between the fixing brazing material, the metal sheet material, and the metal members 11 and 12 can be reliably performed, so that the metal member 11 and the metal member 12 can be joined more firmly.

<Seventh Embodiment>
FIG. 10 is a schematic diagram illustrating the brazing fixing method of the seventh embodiment. The brazing fixing method of the seventh embodiment differs from the brazing fixing method of the first embodiment (FIG. 3) in the shape of the pair of metal members and the shape of the engaging body.

The structure 10 of the present embodiment includes a pair of metal members 51 and 52, and a fixing portion that joins the metal member 51 and the metal member 52.
The metal members 51 and 52 are tubular members and are made of, for example, stainless steel. In the present embodiment, the metal member 51 as “one metal member” and the metal member 52 as “the other metal member” are such that the side surface 53 of the metal member 51 and the side surface 54 of the metal member 52 face each other. Fixed to. The fixing portion of the present embodiment is heated to a temperature at which the fixing brazing material included in the engaging body 55 formed by engaging the engaging portion 56 and the engaged portion 57 shown in FIG. 10 is melted. Is generated.

  The engagement portion 56 is a metal sheet material provided on the side surface 53 of the metal member 51, and in the present embodiment, the BB of FIGS. 10A and 10B before manufacturing the structure 10. As shown in FIG. 10C, which is a sectional view taken along the line, the metal member 51 is formed along the axial direction. The metal member 51 in which the engaging portion 56 is arranged at a predetermined position is referred to as the combination member 16.

  The engaged portion 57 is a fixing brazing material provided on the side surface 54 of the metal member 52, and in the present embodiment, as shown in FIGS. 10A and 10C, in the axial direction of the metal member 52. It is formed so as to follow. The metal member 52 in which the engaged portion 57 is arranged at a predetermined position is referred to as a combination member 17. In FIG. 10C, the engaged portion 57 is indicated by a dotted line in order to easily distinguish the engaging portion 56 arranged on the metal member 51 and the engaged portion 57 arranged on the metal member 52. Shows.

  In this embodiment, when the combination member 16 and the combination member 17 are combined in the fixing step of the brazing fixing method, as shown in FIG. 10B, the side surface 58 of the engaging portion 56 and the engaged portion 57 are separated. The combination member 16 and the combination member 17 are arranged so that the side surface 59 engages. For example, while the side surface 59 of the engaged portion 57 is pressed against the radially outer end surface 56a of the engaging portion 56, the engaged portion 57 is rotated counterclockwise around the axis line, and the side surface 58 of the engaging portion 56 and The side surface 59 of the engaging portion 57 is engaged. After that, the engaged portion 57 is melted by a heating furnace, the metal member 51 and the metal member 52 are fixed by brazing, and the structure 10 is manufactured.

  According to the brazing fixing method of the present embodiment described above, in the fixing step, the engaging portion 56 arranged on the metal member 51 and the engaged portion 57 arranged on the metal member 52 are engaged. To meet. When the fixing brazing material of the engaged portion 57 is melted, the metal member 51 and the metal member 52 are fixed to each other while the engaging portion 56 and the engaged portion 57 are engaged with each other. Since the positional deviation of the metal member 51 with respect to the metal member 52 can be prevented, the positioning accuracy of the pair of metal members 51, 52 can be improved.

  Further, since the metal members 51 and 52 are tubular members, when the side surfaces 53 and 54 are joined together, the curved surfaces are aligned with each other, which makes positioning difficult. A separate means for positioning is required. However, according to the brazing and fixing method of the present embodiment, the side surface 58 of the engaging portion 56 and the side surface 59 of the engaged portion 57 are engaged with each other without using another positioning means, so that a pair of metal members can be used. The 51 and 52 can be fixed accurately.

<Eighth Embodiment>
FIG. 11 is a schematic diagram illustrating the brazing fixing method of the eighth embodiment. The brazing fixing method of the eighth embodiment differs from the brazing fixing method of the seventh embodiment (FIG. 10) in the shape of the engaging body.

  The engaging body 60 of the present embodiment is formed by engaging the engaging portion 61 and the engaged portion 62. The engaging portion 61 is provided on the metal member 51, and the engaged portion 62 is provided on the metal member 52.

  The engaging portion 61 is composed of two metal sheet materials 61a and a fixing brazing material 61b. As shown in FIG. 11A which is a side view of the metal members 51 and 52, the two metal sheet members 61a are formed along the axial direction of the metal member 51 on the side surface 53 of the metal member 51, It is arranged on the side surface 53 while maintaining a predetermined distance. As shown in FIG. 11 (a), the fixing brazing material 61 b has a circumferential direction side of the metal member 51 with respect to the two metal sheet materials 61 a, one end side of one metal sheet material 61 a in the axial direction, and another one. It is arranged on the other end side of the one metal sheet material 61a in the axial direction. The metal member 51 with the engaging portion 61 arranged at a predetermined position is referred to as a combination member 16.

  The engaged portion 62 is composed of a metal sheet material 62a and a fixing brazing material 62b. The metal sheet material 62a is provided on the side surface 54 of the metal member 52 so that it can be located between the two metal sheet materials 61a when fixing the metal member 51 and the metal member 52. As shown in FIG. 11A, the fixing brazing material 62b is on the circumferential direction side of the metal member 52 with respect to the metal sheet material 62a, and when the metal member 51 and the metal member 52 are joined, the metal sheet material 62a. It is arranged so as to be located on the opposite side of the fixing brazing material 61b with the pinch in between. Both ends of the fixing brazing material 62b in the axial direction are formed so as to come into contact with both ends of the fixing brazing material 61b in the axial direction when the metal member 51 and the metal member 52 are joined. The metal member 52 in which the engaged portion 62 is arranged at a predetermined position is referred to as a combination member 17. Note that in FIG. 11C, which is a cross-sectional view taken along the line CC of FIG. 11B, the engaging portion 61 arranged on the metal member 51 and the engaged portion 62 arranged on the metal member 52 are distinguished. In order to make it easy, the engaged portion 62 is shown by a dotted line.

  In this embodiment, when the combination member 16 and the combination member 17 are combined in the fixing step of the brazing fixing method, as shown in FIG. 11C, the side surface 61c of the metal sheet material 61a and the side surface of the fixing brazing material 62b are shown. The combination member 16 and the combination member 17 are arranged so that 62d contacts and the side surface 61d of the fixing brazing material 61b contacts the side surface 62c of the metal sheet material 62a. After that, the fixing brazing materials 61b and 62b are melted by a heating furnace, and the metal member 51 and the metal member 52 are fixed by brazing to manufacture the structure 10.

  According to the brazing / fixing method of this embodiment described above, in the fixing step, the engaging portion 61 provided on the metal member 51 and the engaged portion 62 provided on the metal member 52 are engaged. To meet. When the fixing brazing materials 61b and 62b are melted, the metal member 51 and the metal member 52 are fixed to each other with the engaging portion 61 and the engaged portion 62 engaged with each other. Thereby, the positioning accuracy of the pair of metal members 51 and 52 can be improved.

  Further, according to the brazing / fixing method of the present embodiment, when the metal member 51 and the metal member 52 are arranged in the fixing step, the metal sheet material 62a has two types when the metal member 51 and the metal member 52 are fixed. It is located between the metal sheet materials 61a. Accordingly, the engagement body 60 can prevent the metallic members 51, 52 from being displaced in the axial direction and the circumferential direction. Therefore, the positioning accuracy of the pair of metal members 51, 52 can be further improved.

<Ninth Embodiment>
FIG. 12 is a schematic diagram illustrating the brazing fixing method of the ninth embodiment. The brazing fixing method of the ninth embodiment differs from the brazing fixing method of the seventh embodiment (FIG. 10) in the shape of the engaging body.

  The engaging body 65 of the present embodiment is formed by engaging the engaging portion 66 and the engaged portion 67. The engaging portion 66 is provided on the metal member 51, and the engaged portion 67 is provided on the metal member 52.

  The engaging portion 66 is composed of two metal sheet materials 66a and a fixing brazing material 66b. As shown in FIG. 12A, which is a side view of the metal members 51 and 52, the two metal sheet materials 66a are formed along the axial direction of the metal member 51 on the side surface 53 of the metal member 51, It is arranged on the side surface 53 while maintaining a predetermined distance. As shown in FIG. 12A, the fixing brazing material 66b is arranged on the circumferential side of the metal member 51 with respect to the two metal sheet materials 66a and on one end side of the one metal sheet material 61a in the axial direction. Has been done. The metal member 51 in which the engaging portion 66 is arranged at a predetermined position is referred to as the combination member 16.

  The engaged portion 67 includes a metal sheet material 67a and a fixing brazing material 67b. The metal sheet material 67a is provided on the side surface 54 of the metal member 52 so that it can be located between the two metal sheet materials 67a when the metal member 51 and the metal member 52 are joined. As shown in FIG. 12A, the fixing brazing material 67b is on the circumferential side of the metal member 52 with respect to the metal sheet material 67a, and when the metal member 51 and the metal member 52 are joined, the metal sheet material 67a. It is arranged so as to be located on the opposite side of the fixing brazing material 61b with the pinch in between. One end of the fixing brazing material 67b in the axial direction is formed so as to come into contact with one end of the fixing brazing material 61b in the axial direction when the metal member 51 and the metal member 52 are joined. The metal member 52 in which the engaged portion 67 is arranged at a predetermined position is referred to as a combination member 17. In FIG. 12C, which is a cross-sectional view taken along the line D-D of FIG. 12B, the engaging portion 66 arranged on the metal member 51 and the engaged portion 67 arranged on the metal member 52 are distinguished. In order to make it easy to perform, the engaged portion 67 is shown by a dotted line.

  In this embodiment, when the combination member 16 and the combination member 17 are combined in the fixing step of the brazing fixing method, as shown in FIG. 12C, the side surface 66c of the metal sheet material 66a and the side surface of the fixing brazing material 67b are combined. The combination member 16 and the combination member 17 are arranged such that the side surface 66d of the fixing brazing material 66b and the side surface 67c of the metal sheet material 67a and the side surface 67d of the fixing brazing material 67b contact each other. After that, the fixing brazing materials 61b and 62b are melted by a heating furnace, and the metal member 51 and the metal member 52 are fixed by brazing to manufacture the structure 10.

  According to the brazing / fixing method of the present embodiment described above, in the fixing step, the engaging portion 66 provided on the metal member 51 and the engaged portion 67 provided on the metal member 52 are engaged. To meet. When the fixing brazing materials 66b and 67b are melted, the metal member 51 and the metal member 52 are fixed to each other with the engaging portion 66 and the engaged portion 67 engaged with each other. Thereby, the positioning accuracy of the pair of metal members 51 and 52 can be improved.

  According to the brazing / fixing method of the present embodiment, when the engaging portion 66 and the engaged portion 67 are engaged with each other in the fixing step, the metal sheet material 67a is placed between the two metal sheet materials 66a. To position. Accordingly, the engagement body 65 can prevent the metal members 51 and 52 from being displaced in the axial direction and the circumferential direction. Therefore, the positioning accuracy of the pair of metal members 51, 52 can be further improved.

<Tenth Embodiment>
FIG. 13 is a schematic diagram illustrating the brazing fixing method of the tenth embodiment. The brazing fixing method of the tenth embodiment is different from the brazing fixing method of the seventh embodiment (FIG. 10) in the shape of the engaging body.

  The engaging body 70 of the present embodiment is formed by engaging the engaging portion 71 and the engaged portion 72. The engaging portion 71 is provided on the metal member 51, and the engaged portion 72 is provided on the metal member 52.

  The engagement portion 71 is a metal sheet material provided on the side surface 53 of the metal member 51, and in the present embodiment, as shown in FIG. 13A which is a side view of the metal members 51 and 52, the metal member 51. Is formed along the axial direction of. In the present embodiment, the engagement portion 71 has a length in the axial direction of the metal member 51 that is shorter than the length in the axial direction of the metal member 51. The metal member 51 with the engaging portion 71 arranged at a predetermined position is referred to as a combination member 16.

  The engaged portion 72 is a fixing brazing material provided on the side surface 54 of the metal member 52, and in the present embodiment, as shown in FIG. 13A, when the metal member 51 and the metal member 52 are fixed to each other. It is formed to have a rectangular ring shape that can surround the engaging portion 71. The metal member 52 in which the engaged portion 72 is arranged at a predetermined position is referred to as a combination member 17. In FIG. 13C, which is a cross-sectional view taken along the line EE of FIG. 13B, the engaging portion 71 arranged on the metal member 51 and the engaged portion 72 arranged on the metal member 52 are distinguished. The engaged portion 72 is indicated by a dotted line to facilitate the operation.

  In this embodiment, when the combination member 16 and the combination member 17 are combined in the fixing step of the brazing fixing method, as shown in FIG. 13C, two side surfaces along the axial direction of the engaging portion 71 are provided. The combination member 16 and the combination member 17 are arranged so that 73 and two side surfaces 74 substantially perpendicular to the axial direction engage with the inner peripheral surface of the engaged portion 72 formed in an annular shape. .. After that, the engaged portion 72 is melted by a heating furnace, the metal member 51 and the metal member 52 are fixed by brazing, and the structure 10 is manufactured.

  According to the brazing / fixing method of the present embodiment described above, in the fixing step, the engaging portion 71 provided on the metal member 51 and the engaged portion 72 provided on the metal member 52 are engaged. To meet. When the engaged portion 72 is melted, the metal member 51 and the metal member 52 are fixed to each other with the engaging portion 71 and the engaged portion 72 engaged with each other. Thereby, the positioning accuracy of the pair of metal members 51 and 52 can be improved.

  Further, according to the brazing fixing method of the present embodiment, the engaging portion 71 engages with the engaging portion 71 so as to be surrounded by the engaged portion 72, so that the engaging body 70 has the metal members 51, 52. It is possible to prevent the positional deviation between the axial direction and the circumferential direction. Thereby, the positioning accuracy of the pair of metal members 51, 52 can be further improved.

<Eleventh Embodiment>
FIG. 14: is a schematic diagram explaining the brazing fixing method of 11th Embodiment. The brazing fixing method of the eleventh embodiment is different from the brazing fixing method of the seventh embodiment (FIG. 10) in the shape of the engaging body.

  The engaging body 75 of the present embodiment is formed by engaging the engaging portion 76 and the engaged portion 77. The engaging portion 76 is provided on the metal member 51, and the engaged portion 77 is provided on the metal member 52.

  The engaging portion 76 is a metal sheet material provided on the side surface 53 of the metal member 51, and in the present embodiment, as shown in FIG. 14A which is a side view of the metal members 51 and 52, the metal member 51. Is formed along the axial direction of. In the present embodiment, the engagement portion 76 has a length in the axial direction of the metal member 51 that is shorter than the length in the axial direction of the metal member 51. The engaging portion 76 has two side surfaces 78a and 78b formed along the axis of the metal member 51 and two end surfaces 78c and 78d formed substantially perpendicular to the axis of the metal member 51. And have. The metal member 51 in which the engaging portion 76 is arranged at a predetermined position is referred to as the combination member 16.

  The engaged portion 77 is a fixing brazing material provided on the side surface 54 of the metal member 52, and has five fixing brazing materials 77a, 77b, 77c, 77d, 77e in the present embodiment. The fixing brazing material 77a is formed along the axial direction of the metal member 52, and is provided substantially at the center of the metallic member 52 in the axial direction of the metallic member 52, as shown in FIG. The fixing brazing material 77a is formed so as to be in contact with the side surface 78a of the engaging portion 76. The two fixing brazing materials 77b and 77c are formed along the axial direction of the metal member 52, and are arranged on the side surface 53 so as to be able to contact the side surface 78b of the engaging portion 76 while maintaining a predetermined distance. There is. The fixing brazing material 77d is formed so as to be capable of contacting the side surface 78a of the engaging portion 76 and contacting the end surface 78c of the engaging portion 76. The fixing brazing material 77e is formed so as to be capable of contacting the side surface 78a at one end of the engaging portion 76 and contacting the end surface 78d at the other end of the engaging portion 76. The metal member 51 in which the engaged portion 77 is arranged at a predetermined position is referred to as a combination member 17. In FIG. 14C, which is a cross-sectional view taken along the line FF of FIG. 14B, the engaging portion 76 arranged on the metal member 51 and the engaged portion 77 arranged on the metal member 52 are distinguished. The engaged portion 77 is indicated by a dotted line to facilitate the operation.

  In the present embodiment, when the combination member 16 and the combination member 17 are combined in the fixing step of the brazing fixing method, as shown in FIG. 14C, the side surface 78a of the engaging portion 76 and the fixing brazing materials 77a, 77d. , 77e contact each other, the side surface 78b of the engaging portion 76 contacts the brazing filler metals 77b and 77c, the end surface 78c of the engaging portion 76 contacts the brazing filler material 77d, and the end surface 78d of the engaging portion 76 contacts. The combination member 16 and the combination member 17 are arranged so that the fixing brazing material 77e and the fixing brazing material 77e come into contact with each other. After that, the fixing brazing materials 77a, 77b, 77c, 77d, 77e are melted by a heating furnace, and the metal member 51 and the metal member 52 are fixed by brazing to manufacture the structure 10.

  According to the brazing fixing method of the present embodiment described above, in the fixing step of fixing the metal member 51 and the metal member 52 to each other, the engaging portion 76 provided on the metal member 51 and the metal member 52 are fixed to each other. The engaged portion 77 provided is engaged. When the fixing brazing materials 77a, 77b, 77c, 77d, 77e are melted, the metal member 51 and the metal member 52 are fixed to each other in a state where the engaging portion 76 and the engaged portion 77 are engaged with each other. Thereby, the positioning accuracy of the pair of metal members 51 and 52 can be improved.

  Further, according to the brazing / fixing method of the present embodiment, since the engaging portion 76 engages with the engaged portion 77 so as to be surrounded by the engaged portion 77, the engaging body 70 includes the metal member 51, Positional deviation of 52 in the axial direction and the circumferential direction can be prevented. Thereby, the positioning accuracy of the pair of metal members 51, 52 can be further improved.

<Modification of this embodiment>
The present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the scope of the invention, and the following modifications are possible, for example.

[Modification 1]
FIG. 15 is a schematic diagram illustrating a fixing structure of a modified example of the seventh embodiment. In the modification shown in FIG. 15A, the engaging portion 81 arranged on the metal member 11 is a linear metal sheet material. The engaged parts 82 arranged on the metal member 12 are two fixing brazing materials capable of engaging with the engaging parts 81 on both sides in the longitudinal direction of the engaging parts 81 when fixing the pair of metal members 11, 12. 83 and 84. In this modified example, the engaging portion 81 and the engaged portion 82 are arranged at other than the edge portions of the flat plate-shaped metal members 11 and 12. Also by this, the positioning accuracy of the pair of metal members 11 and 12 can be improved.

[Modification 2]
Further, in the modification shown in FIG. 15B, the engagement portion 81 arranged on the metal member 11 includes a linear metal sheet material 81a and two fixing brazing materials 81b located at both ends of the metal sheet material 81a. , 81c. The engaged parts 82 arranged on the metal member 12 are two fixing brazing materials capable of engaging with the engaging parts 81 on both sides in the longitudinal direction of the engaging parts 81 when fixing the pair of metal members 11, 12. The lengths in the longitudinal direction are the same as those of the metal sheet material 81a. Thereby, when fixing the pair of metal members 11 and 12, the engaged portion 82 is engaged with the engaging portion 81 in two directions of the longitudinal direction of the engaging portion 81 and the direction orthogonal to the longitudinal direction. Engage. This also makes it possible to improve the positioning accuracy of the pair of metal members 11 and 12, and to restrict the movement of the metal members 11 and 12 in the two directions.

[Modification 3]
FIG. 16 is a schematic diagram illustrating a fixing structure of another modification of the seventh embodiment. In the modification shown in FIG. 16A, the engaging portion 86 arranged on the metal member 11 is composed of a linear metal sheet material 86a and a linear fixing brazing material 86b. The brazing material 86a and the brazing material 86b are displaced from each other in the longitudinal direction, as shown in FIG. 16 (a). The engaged portion 87 arranged on the metal member 12 is composed of a linear metal sheet material 87a and a linear fixing brazing material 87b. The metal sheet material 87a and the fixing brazing material 87b are illustrated in the drawings. As shown in FIG. 16 (a), they are arranged so as to be offset in their respective longitudinal directions. In the modification of FIG. 16A, when fixing the metal member 11 and the metal member 12, the metal sheet material 86a and the fixing brazing material 87b are engaged, and the metal sheet material 87a and the fixing brazing material 86b are engaged. To combine. This also makes it possible to improve the positioning accuracy of the pair of metal members 11 and 12, and to restrict the movement of the metal members 11 and 12 in the two directions.

[Modification 4]
In the modification shown in FIG. 16B, the engaging portion 86 arranged on the metal member 11 has a linear metal sheet material 86a having a length shorter than the length of the metal member 11, and a metal member having a length. The fixing brazing material 86b is linear and has the same length as that of the fixing brazing material 86b. The engaged portion 87 arranged on the metal member 12 has two metal sheet materials 87a that can be located at both ends of the metal sheet material 86a when fixing the pair of metal members 11 and 12, and has a length of It is composed of a linear fixing brazing material 87b having the same length as the metal member 12. When fixing the pair of metal members 11 and 12, the metal sheet material 86a and the two metal sheet materials 87a are positioned in a line between the fixing brazing material 86b and the fixing brazing material 87b. This also makes it possible to improve the positioning accuracy of the pair of metal members 11 and 12, and to restrict the movement of the metal members 11 and 12 in the two directions.

[Modification 5]
FIG. 17 is a schematic diagram illustrating a fixing structure according to still another modification of the seventh embodiment. In the modification shown in FIG. 17, the engaging portion 91 arranged on the metal member 11 is a linear metal sheet material having a length slightly shorter than the length of the metal member 11. The engaged portion 92 arranged on the metal member 12 is a fixing brazing material, and when fixing the pair of metal members 11 and 12, the side surface 91 a along the longitudinal direction of the engaging portion 91 and the engaging portion. It is formed so as to be capable of contacting the end faces 91b and 91c at both ends of 91. This also makes it possible to improve the positioning accuracy of the pair of metal members 11 and 12, and to restrict the movement of the metal members 11 and 12 in the two directions.

[Modification 6]
In the engaging body of the first embodiment, the engaging portion 21 is a metal sheet material and the engaged portion 22 is a fixing brazing material. In the third embodiment, the engaging portions 31 and 32 are made of a metal sheet material and a fixing brazing material. However, the configuration of the engagement body is not limited to this. The engaging portion may be at least one of the metal sheet material and the fixing brazing material, and the other brazing material may be at least the other of the metal sheet material and the fixing brazing material.

[Modification 7]
In the engaging body of the first embodiment, the engaging portion 21 and the engaged portion 22 are annularly formed. However, the shapes of the engaging portions 21 and 22 are not limited to this. It suffices that the engaging portion 21 arranged on the metal member 11 and the engaged portion 22 arranged on the metal member 12 can be engaged with each other.

[Modification 8]
In the engaging body of the first embodiment, the engaging portion 21 is provided on the edge of the metal member, and the engaged portion 22 is located inside the engaging portion 21 when the combination member 16 and the combination member 17 are combined. It is supposed to be provided. However, the positions where the engaging portion and the engaged portion are provided are not limited to this. The engaging portion 21 may be arranged substantially at the center of the metal member, and the engaged portion 22 may be arranged at a position where the engaged portion 21 can engage with the engaging portion 21.

[Modification 9]
In the brazing fixing method of the first embodiment, the engaging portion 21 is a metal sheet material as a “supporting metal material” in which an aggregate of metal powder is formed into a sheet shape. However, the shape of the “supporting metal material” is not limited to the sheet shape.

[Modification 10]
In the second embodiment, the concave portion is formed in the engaging portion and the convex portion is formed in the engaged portion. However, a convex portion may be formed on the engaging portion and a concave portion may be formed on the engaged portion.

[Modification 11]
In the brazing fixing method of the seventh embodiment, the tubular metal member 51 and the tubular metal member 52 are joined together. However, one may be a tubular metal member and the other may be a flat metal member.

[Modification 12]
The configurations of the engaging bodies 25, 30, 35, 40, 45 of the second to sixth embodiments may be applied to the tubular metal members 51, 52 described in the seventh embodiment, or the eighth embodiment. The configurations of the engaging bodies 60, 65, 70, and 75 of the eleventh embodiment may be applied to the flat plate-shaped metal members 11 and 12 described in the first embodiment. The configurations of Modifications 1 to 5 may be applied to the tubular metal members 51 and 52.

  Although the present aspect has been described above based on the embodiment and the modified examples, the embodiment of the aspect described above is intended to facilitate understanding of the present aspect, and does not limit the present aspect. The present embodiment can be modified and improved without departing from the spirit and scope of the claims, and the present embodiment includes equivalents thereof. If the technical features are not described as essential in this specification, they can be deleted as appropriate.

10 ... Structure 11, 12, 51, 52 ... Metal member 13, 14 ... Plane 15 ... Fixed part 16, 17 ... Combination member 20, 25, 30, 35, 40, 45, 55, 60, 65, 70, 75 ... Engaging bodies 21, 26, 31, 41, 56, 61, 66, 71, 76, 81, 86, 91 ... Engaging portions 22, 27, 32, 37, 42, 47, 57, 62, 67, 72, 77, 82, 87, 92 ... Engaged portion 23, 43 ... Inner peripheral surface 24, 39, 44, 49 ... Outer peripheral surface 26a, 26b, 31a, 32a, 41a, 61a, 62a, 66a, 67a, 81a, 86a , 87a ... Metal sheet material 26c, 31b, 32b, 41b, 61b, 62b, 66b, 67b, 77a, 77b, 77c, 77d, 77e, 81b, 81c, 83, 84, 86b, 87b ... Fixing brazing material 26d. During 53,54,58,59,61c, 61d, 62d, 66c, 66d, 67c, 67d, 73,74,78a, 78b, 91a ... side surface 56a, 78c, 78d, 91b, 91c ... end surface

Claims (7)

A brazing fixing method for fixing a pair of metal members to each other by brazing,
A fixing brazing material that diffuses into the metal member and is fixed to the metal member, and a step of preparing a supporting metal material containing metal powder,
An engaging portion forming step of forming an engaging portion by disposing at least one of the fixing brazing material and the supporting metal material on one metal member of the pair of metal members,
An engaging portion forming step of forming an engaged portion by disposing at least the other one of the fixing brazing material and the supporting metal material on the other metal member of the pair of metal members,
The fixing brazing material included in the engaging body of the engaging portion and the engaged portion in a state in which the pair of metal members are arranged so that the engaging portion and the engaged portion engage with each other. A fixing step of fixing the pair of metal members to each other by melting and impregnating the supporting metal material.
Brazing method. The brazing fixing method according to claim 1,
In the engaging portion forming step, a recess is formed in the engaging portion using at least one of the fixing brazing material and the supporting metal material,
In the engaged portion forming step, a convex portion is formed in the engaged portion using at least the other of the fixing brazing material and the supporting metal material,
In the fixing step, the pair of metal members are positioned by engaging the concave portion and the convex portion,
Brazing method. The brazing fixing method according to claim 1 or 2, wherein
The total volume of the fixing brazing material contained in the engagement body is at least twice the total volume of the supporting metal material contained in the engagement body,
Brazing method. The brazing fixing method according to any one of claims 1 to 3,
In the engaging body, the engaging portion is restricted from moving in at least two directions orthogonal to each other by the engaged portion.
Brazing method. The brazing fixing method according to any one of claims 1 to 4,
At least one of the one metal member and the other metal member is formed in a tubular shape,
At least one of the engaging portion and the engaged portion is formed on a curved surface,
Brazing method. A method for manufacturing a structure, comprising: a pair of metal members; and a fixing portion that fixes the pair of metal members to each other,
A fixing brazing material that diffuses into the metal member and is fixed to the metal member, and a step of preparing a supporting metal material containing metal powder,
An engaging portion forming step of forming an engaging portion by disposing at least one of the fixing brazing material and the supporting metal material on one metal member of the pair of metal members,
An engaging portion forming step of forming an engaged portion by disposing at least the other one of the fixing brazing material and the supporting metal material on the other metal member of the pair of metal members,
The fixing brazing material included in the engaging body of the engaging portion and the engaged portion in a state in which the pair of metal members are arranged so that the engaging portion and the engaged portion engage with each other. A fixing portion forming step of forming the fixing portion by melting and impregnating the supporting metal material.
Method of manufacturing structure. A fixing structure used for fixing a pair of metal members to each other by brazing,
At least one of a fixing brazing material that diffuses into the metal member and is fixed to the metal member, and a supporting metal material containing metal powder, and is disposed on one metal member of the pair of metal members. Azabu,
At least the other of the fixing brazing material and the supporting metal material, and an engaged portion arranged in the other metal member of the pair of metal members,
The engaging portion and the engaged portion are formed to be engageable,
Fixed structure.

Images