JP2017013108A - Manufacturing method for brazing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for a brazing structure which suppresses a deviation of a joint position while securing an appropriate thickness of a brazing material.SOLUTION: A manufacturing method for a brazing structure comprises; a preparation process of preparing a metal member having at least one of a concave part and a convex part, and a metal plate formed as a flat plate; an arrangement step of arranging a metal powder aggregate and a brazing material on the meal plate; and a joint step of impregnating the brazing material into the metal powder aggregate to make a composite brazing material by heating the brazing material, and then joining the metal plate and the metal member using the composite brazing material.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a method for manufacturing a brazed structure.

  Patent Document 1 describes a configuration in which a release agent is disposed at a bonding interface of a substrate when the substrate and the heat sink are bonded with a brazing material. By this release agent, a non-bonded region that is not bonded to the substrate and the heat sink is formed, and by providing this non-bonded region, thermal stress at the time of bonding with the brazing material is relieved.

JP 2008-235672 A

  However, in the conventional configuration, when the metal plate and the metal member are joined with the brazing material, the movement of the brazing material cannot be controlled, and the brazing material flows out of the joining interface with the metal member. There is. Thereby, an appropriate thickness of the brazing material may not be ensured. Moreover, when joining a metal plate and a metal member with a brazing material and a joining position shifts, joining failure may arise.

  An object of this invention is to suppress the position shift of a joining position, ensuring the appropriate thickness of a brazing material.

  The method for manufacturing a brazed structure according to claim 1 includes a preparation step of preparing a metal member having at least one of a concave portion and a convex portion and a flat metal plate, and a set of metal powders on the metal plate. An arrangement step of arranging a body and a brazing material; and heating the brazing material to impregnate the brazing material into the metal powder of the aggregate to form a composite brazing material, and the composite brazing material causes the metal plate and the brazing material to be impregnated. A joining step for joining the metal member.

  According to the manufacturing method of the first aspect, the metal powder aggregate and the brazing material are arranged on the metal plate. Further, by heating the brazing material, the metal powder of the aggregate is impregnated with the brazing material to form a composite brazing material, and the metal plate and the metal member are joined by the composite brazing material.

  Here, in claim 1, since the metal powder aggregate serves as a support (spacer) when the metal plate and the metal member are joined, the metal powder aggregate is used only for brazing without using the metal powder aggregate. Compared to the case, the appropriate thickness of the brazing material is ensured.

  Further, in claim 1, the metal plate on which the aggregate of metal powder and the brazing material are arranged is a flat plate, and the metal plate has no step. For this reason, it is not necessary for the operator (or apparatus) who arranges the aggregate of metal powder and the brazing material to perform the arrangement operation (or arrangement operation) while avoiding (considering) the step. Therefore, compared with the case where the metal powder aggregate and the brazing material are arranged on the metal member having at least one of the concave portion and the convex portion, the arrangement position of the metal powder aggregate and the brazing material is set to the set position (target position). It is hard to slip. For this reason, the position shift of the joining position which joins a metal plate and a metal member can be controlled.

  In the method for manufacturing a brazed structure according to claim 2, in the preparation step, one or more metal plates and two or more metal members are prepared, and in the placement step, each of both surfaces of the metal plate is provided. In the joining step, the metal member, the metal plate, and the metal member are stacked in the order of the metal member, the metal plate, and the metal member. Joining with the composite brazing material.

  According to the manufacturing method of claim 2, when joining the metal member, the metal plate, and the metal member in a state where the metal member, the metal plate, and the metal member are laminated in this order, the aggregate of the metal powder and the brazing material are The metal plate is not a metal member. For this reason, it is not necessary for the operator (or apparatus) who arranges the aggregate of metal powder and the brazing material to perform the arrangement operation (or arrangement operation) while avoiding (considering) the step. Therefore, compared with the case where the metal powder aggregate and the brazing material are arranged on the metal member having at least one of the concave portion and the convex portion, the arrangement position of the metal powder aggregate and the brazing material is set to the set position (target position). It is hard to slip. For this reason, the position shift of the joining position which joins a metal plate and a metal member can be controlled.

  In the method for manufacturing a brazed structure according to claim 3, in the preparation step, the metal member having a convex portion extruded so as to form a concave space and a flat portion formed around the convex portion. And the metal plate, and in the joining step, the flat portion of the metal member and the metal plate are joined so that the opening of the concave space is closed by the metal plate.

  According to the manufacturing method of Claim 3, the flat part of a metal member and a metal plate are joined, and the opening of the concave space of a metal member is closed with a metal plate. Thereby, the container which makes concave space internal space can be manufactured as a brazing structure. Moreover, since the flat part of a metal member and the metal plate made into the flat plate are joined, the thickness (joining space | interval) of brazing is easy to manage.

  In the method for manufacturing a brazed structure according to a fourth aspect of the present invention, in the preparation step, the metal member having a protruding portion that is extruded so that a concave space is further formed at the top of the protruding portion is prepared.

  According to the manufacturing method of Claim 4, the flat part of a metal member and a metal plate are joined, and the opening of the concave space of a metal member is closed with a metal plate. Thereby, the container which makes concave space internal space can be manufactured as a brazing structure. And when using a container as a heat exchanger which heat-exchanges between the heat medium which distribute | circulates internal space, and the heat medium which distribute | circulates the exterior of a container, since a container has a some convex part, the contact area of a heat medium can be increased. .

  In the method for manufacturing a brazed structure according to a fifth aspect, in the placement step, the assembly formed in a sheet shape and the brazing material are placed on the metal plate.

  According to the manufacturing method of claim 5, since the assembly and the brazing material formed in a sheet shape are arranged on the metal plate, arrangement work (arrangement operation) is easier than in the case where the metal powder is arranged in a powder state. Can be.

  ADVANTAGE OF THE INVENTION According to this invention, the position shift of a joining position can be suppressed, ensuring the appropriate thickness of a brazing material.

It is a sectional side view of the heat exchanger which concerns on this embodiment. It is a perspective view of the heat exchanger which concerns on this embodiment. It is a perspective view of the metal member concerning this embodiment. It is the front view and side sectional view (4B-4B sectional view taken on the line) of the metal member concerning this embodiment. It is the front view, side sectional view (5B-5B sectional view taken on the line) of a metal plate concerning this embodiment, and a rear view. It is a sectional side view which decomposed | disassembled each member of the heat exchanger which concerns on this embodiment. It is a perspective view of the metal member which concerns on a 1st modification. It is the front view and side sectional view (8B-8B sectional view taken on the line) of the metal member concerning the 1st modification. It is a sectional side view of the heat exchanger which concerns on a 1st modification. It is a perspective view of the metal member which concerns on a 2nd modification. It is the front view and side sectional view (11B-11B sectional view taken on the line) of the metal member concerning the 2nd modification. It is the front view, side sectional view (12B-12B sectional view taken on the line) of a metal plate which concerns on a 2nd modification, and a rear view. It is a sectional side view of the heat exchanger which concerns on a 2nd modification. It is the front view and side sectional drawing (14B-14B sectional view taken on the line) of the metal member which concerns on a 3rd modification. It is the front view of the metal plate which concerns on a 3rd modification, side sectional drawing (15B-15B sectional view taken on the line), and a rear view. It is a sectional side view of the heat exchanger which concerns on a 3rd modification. The front view of the 1st member which constitutes the metal member concerning other modifications, the front view of the 2nd member, the side sectional view (17C-17C line sectional view) of the 1st member, and the side sectional view of the second member (17D) -17D sectional view).

  An example of an embodiment according to the present invention will be described with reference to the drawings. Below, the manufacturing method of the heat exchanger 10 as an example of a brazing structure and the heat exchanger 10 is demonstrated.

(Heat exchanger 10)
As shown in FIG. 1, the heat exchanger 10 includes a housing 20, two pipe members 30 and 40, a plurality (specifically four) metal members 50, and a plurality (specifically, 4) metal plates 60 and a composite brazing material 70 for joining the metal members 50 and the metal plates 60 to each other.

(Case 20)
The casing 20 is a member that accommodates two pipe members 30 and 40, a plurality (specifically, four) metal members 50, and a plurality (specifically, four) metal plates 60. It is. Specifically, the housing 20 includes a main body 22 formed in a box shape (cuboid shape) having an opening on one side (left side in FIG. 1), and a lid member 24 that closes the opening 22M of the main body 22. Have.

  As shown in FIG. 2, the main body 22 is specifically composed of an upper wall 22A, a bottom wall 22B, and side walls 22C, 22D, and 22E. The lid member 24 is formed in a plate shape. As shown in FIG. 1, circular holes 22 </ b> F and 24 </ b> A through which the pipe portions 34 and 44 of the pipe members 30 and 40 are inserted are formed in the side wall 22 </ b> E and the lid member 24, respectively.

(Tube members 30, 40)
As shown in FIG. 1, the tube members 30 and 40 have plate portions 32 and 42 and tube portions 34 and 44, respectively. The plate portions 32 and 42 are formed of flat plates. The plate portions 32 and 42 are formed in a rectangular shape along the inner walls of the upper wall 22A, the bottom wall 22B, and the side walls 22C and 22D when viewed in the thickness direction. Circular holes 32 </ b> A and 42 </ b> A are penetrated in the thickness direction at the center of the plate portions 32 and 42.

  The pipe parts 34 and 44 are formed in a tubular shape (cylindrical shape) (see FIG. 2). The pipe portions 34 and 44 project from the outer edges of the circular holes 32A and 42A of the plate portions 32 and 42 and communicate with the circular holes 32A and 42A.

(Metal member 50)
The metal member 50 is formed by pressing a metal plate made of stainless steel. Specifically, as shown in FIGS. 3 and 4A and 4B, the metal member 50 includes a protrusion 52 that is pushed out so as to form a concave space 51, and a periphery of the protrusion 52. And a formed frame-shaped flat portion 56. The convex portion 52 has a rectangular shape in front view (see FIG. 4A), and the concave space 51 has a rectangular parallelepiped shape. A rectangular hole 58 having a rectangular shape penetrating the top 52A in the thickness direction is formed in the top 52A of the convex portion 52.

(Metal plate 60)
The metal plate 60 is a metal plate made of stainless steel and formed into a flat plate, and is formed of, for example, a metal plate made into a flat plate having the same thickness as the metal member 50 before processing. The metal plate 60 is formed in a rectangular shape along the outer edge of the flat portion 56 of the metal member 50. As shown in FIGS. 5A and 5B, the metal plate 60 is formed with a rectangular hole 68 having a rectangular shape penetrating in the thickness direction.

  Specifically, when the metal plate 60 and the metal member 50 are stacked such that the outer edge of the metal plate 60 is along the outer edge of the flat portion 56 of the metal member 50, the metal plate 60 overlaps the rectangular hole 58 of the metal member 50. A rectangular hole 68 is formed. Further, the rectangular hole 68 has the same size as the rectangular hole 58 of the metal member 50.

(Composite brazing material 70)
The composite brazing material 70 (see FIG. 1) has a metal powder 72 (see FIG. 5) and a brazing material 76 (see FIG. 5).

  As the metal powder 72, stainless steel powder having the same composition as that of the metal member 50 and the metal plate 60 is used. At the brazing temperature, the brazing material 76 is impregnated into the metal powder 72 so as to coexist on the surface of the metal powder 72. Crystal bonds are formed. As the metal powder 72, for example, a powder having a particle size of 10 to 45 [μm] is used.

  As the brazing material 76, a material that has a low melting point with respect to the metal member 50 and the metal plate 60 made of stainless steel and that can be eutectic bonded to the metal member 50 and the metal plate 60 is used. As the brazing material 76, for example, a Ni-based (nickel) brazing material, a Fe-based (iron) brazing material, an Ag-based (silver) brazing material, or a Ti-based (titanium) brazing material can be used. In the embodiment, a Ni-based (nickel) brazing material is used as the brazing material 76.

  Accordingly, the composite brazing material 70 is formed by eutectic bonding of the brazing material 76, which is a Ni-based brazing material, to the metal powder 72, which is a stainless steel powder, at a brazing temperature. Furthermore, in this composite brazing material 70, the volume ratio of the brazing material 76 to the metal powder 72 is, for example, 25% or more and 50% or less. This volume ratio can be obtained by calculating from the relationship between mass and true density.

  And in this embodiment, as FIG. 1 shows, the pipe member 30, the metal member 50, the metal plate 60, the metal member 50, the metal plate 60, the metal member 50, the metal plate 60, the metal member 50, the metal plate 60 And each member is joined by the composite brazing material 70 in the state where the pipe member 40 is laminated in this order.

  Thereby, the concave space 51 of each metal member 50, the inside of the pipe part 34 of the pipe member 30, and the inside of the pipe part 44 of the pipe member 40 communicate with each other, and the first circulation space 91 through which the heat medium flows is formed. It is configured. Furthermore, a second circulation space 92 that is partitioned from the first circulation space 91 by the metal member 50 and through which the heat medium flows is formed outside the four metal members 50. In the heat exchanger 10, heat exchange is performed between the heat medium flowing through the first distribution space 91 and the heat medium flowing through the second distribution space 92. Note that the heat medium flowing through the second distribution space 92 passes through the inlet (not shown) and the outlet (not shown) formed in the side walls 22C and 22D of the casing 20 to the inside of the casing 20. Inflow and outflow.

  Note that the rectangular hole 58 (A) and the rectangular hole 68 (A) shown in FIG. 1 may be shifted upward (or lower) in FIG. 1 with respect to the circular hole 32A. Further, the rectangular hole 58 (B) and the rectangular hole 68 (B) shown in FIG. 1 are lower than the rectangular hole 58 (A) and the rectangular hole 68 (A) shown in FIG. ). Furthermore, the rectangular hole 58 (C) and the rectangular hole 68 (C) shown in FIG. 1 are the upper side (or lower side) in FIG. 1 with respect to the rectangular hole 58 (B) and the rectangular hole 68 (B) shown in FIG. ). Thereby, the heat medium can be caused to meander and circulate in the first distribution space 91.

  In this embodiment, in the below-described arrangement process when the heat exchanger 10 is manufactured, the metal sheet 72 (the metal powder 72 of the metal powder 72) is formed by forming the metal powder 72 into a sheet shape (band shape) instead of the metal powder 72 itself. An example of an aggregate) is used.

  The metal sheet material 74 is made of a sheet material having a constant thickness and extending in one direction. Specifically, the metal sheet material 74 has a thickness obtained by mixing the metal powder 72 and a binder (for example, an organic solvent or an aqueous medium) for bonding the powders of the metal powder 72, and drying the mixture. (As an example, the thickness is 90 [μm]). The binder remaining in the metal sheet material 74 evaporates at a temperature equal to or lower than the temperature in the heating furnace (brazing temperature) in the joining process described later.

  Moreover, in this embodiment, what was shape | molded by the sheet | seat shape (band | belt shape) is used for the brazing | wax material 76 in the below-mentioned arrangement | positioning process at the time of manufacturing the heat exchanger 10. FIG.

  Then, in the joining step described later when the heat exchanger 10 is manufactured, the binder of the metal sheet material 74 evaporates and the sheet-like brazing material is impregnated into the metal powder 72 to form the composite brazing material 70. It has become.

(Manufacturing method of the heat exchanger 10)
The manufacturing method of the heat exchanger 10 has a preparation process, an arrangement | positioning process, a joining process, and an accommodation process. Hereinafter, each step will be described.

(Preparation process)
In the preparation step, as shown in FIG. 6, the housing 20, the two pipe members 30, 40, the plurality (specifically, four) metal members 50, and the plurality (specifically, four). The metal plate 60 is prepared.

(Arrangement process)
In the arranging step, as shown in FIG. 6, a sheet-like brazing material 76 and a metal sheet material 74 are arranged on both surfaces of each metal plate 60.

  Specifically, on one surface of each metal plate 60, a metal sheet material 74 is arranged in a frame shape along the outer edge of the metal plate 60 as shown in FIGS. Further, the brazing material 76 is arranged in a frame shape adjacent to the inner peripheral side of the metal sheet material 74.

  Further, as shown in FIGS. 5B and 5C, the brazing material 76 is arranged in a frame shape along the outer edge of the rectangular hole 68 of the metal plate 60 on the other surface of each metal plate 60. Further, the metal sheet material 74 is arranged in a frame shape adjacent to the outer peripheral side of the brazing material 76.

  Further, a brazing material 76 is annularly disposed along the outer edge of the circular hole 32A on the surface of the tube member 30 on the side opposite to the side where the tube portion 34 is formed (see FIG. 6). Further, the metal sheet material 74 is arranged in an annular shape adjacent to the outer peripheral side of the brazing material 76.

  In addition, the arrangement | positioning operation | work (arrangement | positioning operation | movement) of the metal sheet material 74 and the brazing material 76 is performed by the operator (or apparatus) which arrange | positions the metal sheet material 74 and the brazing material 76. In addition, the brazing material 76 and the metal sheet material 74 may be disposed with a gap as long as the after-mentioned suction effect in which the molten brazing material 76 is sucked by the metal powder 72 is exhibited.

(Joining process)
In the joining step, as shown in FIG. 6, first, the pipe member 30, the metal member 50, the metal plate 60, the metal member 50, the metal plate 60, the metal member 50, the metal plate 60, the metal member 50, the metal plate 60 and The tube members 40 are laminated in this order. Then, the two pipe members 30, 40, the four metal members 50, and the four metal plates 60 are put in a heating furnace (not shown) in a state where the metal sheet material 74 and the brazing material 76 are sandwiched by these members. Then, the brazing material 76 is heated and melted. The temperature in the heating furnace is set so that the Ni-based brazing material melts but the metal member 50 and the metal plate 60 do not melt (for example, 1100 ° C.).

  In the joining process, as a result of laminating each member, the tube member 30, the metal member 50, the metal plate 60, the metal member 50, the metal plate 60, the metal member 50, the metal plate 60, the metal member 50, the metal plate 60, and the tube What is necessary is just to be the state laminated | stacked in order of the member 40. FIG. That is, the order of operations (operations) for stacking the members may not be the order described above.

  As a result, the binder of the metal sheet material 74 evaporates and the brazing material 76 melted in the metal powder 72 constituting the metal sheet material 74 is sucked (suction effect). As a result, the brazing material 76 is impregnated into the metal powder 72, and the brazing material 76 is eutectic bonded to the surface of the metal powder 72 by this impregnation, whereby the composite brazing material 70 is formed.

  Further, the brazing material 76 impregnated in the metal powder 72 diffuses at the bonding interface between the metal member 50 and the metal plate 60 and is eutectic bonded to the metal member 50 and the metal plate 60. Then, by cooling the composite brazing material 70, the metal member 50 and the metal plate 60 are joined (brazed) by the composite brazing material 70.

  Specifically, the flat portion 56 of the metal member 50 and the metal plate 60 are joined so that the opening 51 </ b> A (see FIG. 4B) of the concave space 51 of the metal member 50 is closed by the metal plate 60. . Thus, the opening 51 </ b> A of the concave space 51 of the metal member 50 is closed by the metal plate 60 by joining the flat portion 56 of the metal member 50 and the metal plate 60. Thereby, a container having the concave space 51 as an internal space is formed.

  In the state where the metal member 50 and the metal plate 60 are joined, the thickness of the composite brazing material 70 is equal to the thickness of the metal sheet material 74 and the thickness of the brazing material 76 arranged on the metal plate 60 in the arranging step. It has become. This is because the metal powder 72 serves as a support (spacer), as will be described later.

(Containment process)
The two pipe members 30, 40, the four metal members 50 and the four metal plates 60 joined in the joining process so that the pipe portion 44 of the pipe member 40 is inserted into the circular hole 22 </ b> F of the main body 22. And accommodated in the main body 22 of the housing 20. The heat exchanger 10 is manufactured by closing the lid member 24 so that the pipe portion 34 of the pipe member 30 is inserted into the circular hole 24 </ b> A of the lid member 24. The main body 22 and the lid member 24 are joined by welding, for example.

  The main body 22 and the lid member 24 may be joined using the composite brazing material 70. In this case, for example, the brazing material 76 and the metal sheet material 74 are disposed at a joint portion where the main body 22 and the lid member 24 are joined in the above-described placement step. In the above-described joining step, the two pipe members 30, 40, the four metal members 50, and the four metal plates 60 are accommodated in the main body 22, and the lid member 24 is closed, and the inside of the heating furnace (not shown) And the brazing material 76 is melted.

(Operational effect of this embodiment)
In the present embodiment, as described above, the brazing material 76 is impregnated into the metal powder 72 and the brazing material 76 is eutectic bonded to the surface of the metal powder 72 in the joining step, whereby the composite brazing material 70 is formed. . Here, when the metal powder 72 which comprises the metal sheet material 74 joins the metal member 50 and the metal plate 60, it plays the role of a support | pillar (spacer). For this reason, the composite brazing material 70 is not crushed, and the composite brazing material 70 maintains a state in which an arbitrary thickness is maintained. Thus, in this embodiment, the appropriate thickness of the brazing material can be ensured as compared with the case where the metal powder 72 is used and the brazing material 76 is used alone.

  Moreover, since the flat part 56 of the metal member 50 and the metal plate 60 made into a flat plate are joined, it is easy to manage the thickness (joining interval) of brazing.

  Further, in the present embodiment, the metal plate 60 on which the metal sheet material 74 and the brazing material 76 are arranged is a flat plate, and the metal plate 60 has no step. For this reason, the operator (or apparatus) who arranges the metal sheet material 74 and the brazing material 76 does not need to perform the arrangement operation (or arrangement operation) while avoiding (considering) the step, so the metal sheet material 74 and the brazing material Compared with the case where the material 76 is arranged on the metal member 50, the arrangement positions of the metal sheet material 74 and the brazing material 76 are less likely to be shifted from the set position (target position). For this reason, the position shift of the joining position which joins the metal member 50 and the metal plate 60 can be suppressed.

  Furthermore, in this embodiment, in order to arrange the metal sheet material 74 in which the metal powder 72 is formed into a sheet shape in the arrangement step, for example, compared to the case where the metal powder 72 is arranged in a powder state, the arrangement work (arrangement operation) ) Can be facilitated.

(First modification)
Instead of the metal member 50 described above, a metal member 150 may be used as shown in FIGS. 7 and 8A and 8B.

  Similarly to the metal member 50, the metal member 150 is formed, for example, by pressing a metal plate made of stainless steel. The metal member 150 includes a convex portion 154 pushed out so that a concave space 151 is further formed at the top portion 52A of the convex portion 52 in the metal member 50, and a rectangular rectangular hole 158 penetrating the top portion 154A of the convex portion 154. ,have. In this respect, the metal member 150 is different from the metal member 50. Other configurations are the same as those of the metal member 50. In the metal member 150, the same reference numerals are given to the same components as the metal member 50.

  Also in the first modified example, the heat exchanger 10 is manufactured through the preparation process, the arranging process, the joining process, and the housing process, as in the above-described manufacturing method.

  According to this modification, since the metal member 150 has the plurality of convex portions 52 and 154, the volume of the second circulation space 92 can be increased and the heat flowing through the second circulation space 92 as shown in FIG. The medium flow rate can be secured. Further, the contact area between the heat medium flowing through the second distribution space 92 and the metal member 50 can be increased, and the heat exchange efficiency between the heat medium flowing through the second distribution space 92 and the heat medium flowing through the first distribution space 91 is increased. Can be improved.

(Second modification)
Instead of the metal member 50 described above, a metal member 250 may be used as shown in FIGS. 10 and 11A and 11B.

  Similarly to the metal members 50 and 150, the metal member 250 is formed, for example, by pressing a metal plate made of stainless steel. The metal member 250 has two extruding portions 256 (concave portions) in which the top portion 52A of the convex portion 52 in the metal member 150 is extruded to the opposite side to the convex portion 154. The two extruding parts 256 (concave parts) are arranged with the convex part 154 at an upper position and a lower position in FIG. 11 (FIG. 8).

  The bottom surface 256 </ b> A (joint surface) of each extrusion portion 256 is joined to the metal plate 60 by the composite brazing material 70. In addition, a concave space 251 that is narrower than the combined space of the concave space 51 and the concave space 151 is formed in the metal member 250 by forming the extrusion portion 256.

  The metal member 250 is different from the metal member 150 in that it has the extruded portion 256 and the concave space 251. Other configurations are the same as those of the metal member 150. In the metal member 250, the same reference numerals are given to the same components as those of the metal member 150.

  Also in the second modified example, the heat exchanger 10 is manufactured through the preparation process, the arranging process, the joining process, and the housing process, similarly to the above-described manufacturing method. However, in the second modification, in the arrangement step, the metal sheet material 74 is placed on one surface of each metal plate 60 along the outer edge of the metal plate 60 as shown in FIGS. Arrange in a frame shape. Further, the brazing material 76 is arranged in a frame shape adjacent to the inner peripheral side of the metal sheet material 74.

  Further, the metal sheet material 74 and the brazing material 76 are disposed adjacent to each of the joint portions of the metal plate 60 to the bottom surface 256 </ b> A of the extruded portion 256 of the metal member 250. The metal sheet material 74 and the brazing material 76 are arranged linearly along the length direction of the extrusion portion 256.

  In addition, on the other surface of each metal plate 60, as shown in FIGS. 12B and 12C, a brazing material 76 is arranged in a frame shape along the outer edge of the rectangular hole 68 of the metal plate 60. Further, the metal sheet material 74 is arranged in a frame shape adjacent to the outer peripheral side of the brazing material 76.

  According to this modification, in the metal member 250, the pushing portion 256 (concave portion) formed by pushing the top portion 52A of the convex portion 52 to the side opposite to the convex portion 154 functions as a reinforcing portion (reinforcing bar). For this reason, the strength of the metal member 250 can be increased. Moreover, according to this modification, since the metal member 250 is joined to the metal plate 60 also in the extrusion part 256, the joining area can be increased and the joining strength can be increased. Furthermore, according to this modification, since the metal member 250 has the extrusion part 256, the volume of the second circulation space 92 can be increased as shown in FIG. A flow rate can be secured.

(Third modification)
Instead of the metal member 50 described above, a metal member 350 may be used as shown in FIGS.

  Similarly to the metal member 50, the metal member 350 is formed, for example, by pressing a metal plate made of stainless steel. The metal member 350 includes two convex portions 352 extruded so as to form a concave space 351, a frame-like flat portion 356 formed around the two convex portions 252, and the two convex portions 252. And a flat portion 359 formed on the substrate. Each convex portion 352 has a rectangular shape when viewed from the front (see FIG. 14A), and the concave space 51 has a rectangular parallelepiped shape. A rectangular hole 358 having a rectangular shape penetrating the top portion 352A in the thickness direction is formed in the top portion 352A of each convex portion 352.

  In the third modified example, a metal plate 360 is used instead of the metal plate 60 described above. The metal plate 360 is a metal plate made of stainless steel and made into a flat plate, and is made of a flat metal plate having the same thickness as the metal member 350 before processing. The metal plate 360 is formed in a rectangular shape along the outer edge of the flat portion 356 of the metal member 350. As shown in FIGS. 15A and 15B, the metal plate 360 has two rectangular holes 368 having a rectangular shape penetrating in the thickness direction.

  Specifically, when the metal plate 360 and the metal member 350 are stacked such that the outer edge of the metal plate 360 is along the outer edge of the flat portion 356 of the metal member 350, the position overlaps with each rectangular hole 358 of the metal member 350. In addition, each rectangular hole 368 is formed. Further, the rectangular hole 368 has the same size as the rectangular hole 358 of the metal member 350.

  Further, in the third modified example, the pipe parts 30 and 40 have two pipe parts 34 and 44 so that each pipe part 34 and 44 communicates with each rectangular hole 358 and each rectangular hole 368. (See FIG. 16). In addition, two circular holes 22F and 24A through which the pipe portions 34 and 44 are inserted are formed in the side wall 22E and the lid member 24 (see FIG. 16).

  Also in the third modified example, the heat exchanger 10 is manufactured through a preparation process, an arrangement process, a joining process, and a housing process, as in the above-described manufacturing method. However, in the third modification, the metal sheet material 74 is placed on one surface of each metal plate 360 along the outer edge of the metal plate 360 as shown in FIGS. Arrange in a frame shape. Further, the brazing material 76 is arranged in a frame shape adjacent to the inner peripheral side of the metal sheet material 74. Further, the metal sheet material 74 and the brazing material 76 are disposed adjacent to each other at the joint portion of the metal plate 360 with the flat portion 359 of the metal member 350. The metal sheet material 74 and the brazing material 76 are linearly arranged along the length direction of the flat portion 359.

  As shown in FIGS. 15B and 15C, brazing material 76 is arranged in a frame shape along the outer edge of each rectangular hole 368 of the metal plate 360 on the other surface of each metal plate 360. Further, the metal sheet material 74 is arranged in a frame shape adjacent to the outer peripheral side of each brazing material 76.

  According to this modification, as shown in FIG. 16, a circulation space 391 in which the heat medium flows can be formed by each of the two concave spaces 351 included in each metal member 350. That is, it is possible to form two channels of channels through which the heat medium flows. In this configuration, it is possible to increase the number of systems through which the heat medium flows by increasing the number of convex portions 352.

(Other variations)
In this embodiment, although the example which manufactures the heat exchanger 10 as an example of a brazing structure was demonstrated, it is not restricted to this. For example, the present invention may be applied to the case where a container as an example of a brazing structure is manufactured using the metal member 50 and the metal plate 60 described above one by one.

  As shown in FIG. 17, the metal member 150 may have a divided structure. In the example shown in FIG. 17, the metal member 150 is divided into two parts, a first member 191 shown in FIGS. 17A and 17C and a second member 192 shown in FIGS. . The first member 191 has a convex part 154 and a top part 52 </ b> A of the convex part 52. The second member 192 includes a flat part 56 and a side part 52B of the convex part 52. Similarly, the metal members 50, 250, and 350 can have a divided structure.

  The present invention is not limited to the above-described embodiment, and various modifications, changes, and improvements can be made without departing from the spirit of the present invention. For example, the modification examples described above may be appropriately combined.

10 Heat exchanger (an example of brazed structure)
50 Metal member 51 Concave space 52 Convex part 56 Flat part 60 Metal plate 74 Metal sheet material (an example of an assembly of metal powders)
76 Brazing material 151 Concave space 154 Convex part

Claims (5)

A preparation step of preparing a metal member having at least one of a concave portion and a convex portion, and a metal plate made into a flat plate;
An arrangement step of arranging an aggregate of metal powder and a brazing material on the metal plate
A joining step in which the brazing material is impregnated into the metal powder of the aggregate by heating the brazing material to form a composite brazing material, and the metal plate and the metal member are joined by the composite brazing material;
The manufacturing method of the brazing structure which has this. In the preparation step, one or more metal plates and two or more metal members are prepared,
In the arranging step, the assembly and the brazing material are arranged on both surfaces of the metal plate,
The said joining process WHEREIN: The said metal member, the said metal plate, and the said metal member are joined in the state laminated | stacked in order of the said metal member, the said metal plate, and the said metal member by the said composite brazing material. A method for manufacturing a brazed structure. In the preparation step, preparing the metal member having a convex portion extruded so as to form a concave space and a flat portion formed around the convex portion, and the metal plate,
The method for manufacturing a brazed structure according to claim 1 or 2, wherein in the joining step, the flat portion of the metal member and the metal plate are joined so that the opening of the concave space is closed by the metal plate. . The method for manufacturing a brazed structure according to claim 3, wherein in the preparation step, the metal member having a protruding portion that is extruded so that a concave space is further formed at the top of the protruding portion is prepared. The manufacturing method of the brazing structure according to any one of claims 1 to 4, wherein in the arranging step, the aggregate and the brazing material formed in a sheet shape are arranged on the metal plate.

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