WO2023248817A1

WO2023248817A1 - Method for manufacturing metal bonded body, and method for bonding diecast member

Info

Publication number: WO2023248817A1
Application number: PCT/JP2023/021385
Authority: WO
Inventors: 敏明北澤
Original assignee: 株式会社Mole′S Act
Priority date: 2022-06-22
Filing date: 2023-06-08
Publication date: 2023-12-28

Abstract

This method for manufacturing a metal bonded body comprises: a metal member preparing step for preparing a first diecast member 10 which is made of an aluminum-based material and has a first bonding-intended surface 12, and a second diecast member 20 which is made of an aluminum-based material and has a second bonding-intended surface 22; and a metal bonded body forming step in which the first diecast member 10 and a first deformation suppressing member 200 for suppressing deformation of the first diecast member 10 are combined, and, in a state in which the first bonding-intended surface 12 and the second bonding-intended surface 22 are contacted with each other, the first diecast member 10 and the second diecast member 20 are pressed relative to each other such that a pressure is applied to the first bonding-intended surface 12 and the second bonding-intended surface 22, in order to achieve a diffusion bonding of the first diecast member 10 and the second diecast member 20 to form a metal bonded body 100.　According to the method of the invention for manufacturing a metal bonded body, it is possible to suppress the escape of pressure during bonding and deformation of the diecast members.

Description

Method for manufacturing metal joined body and method for joining die-cast members

The present invention relates to a method for manufacturing a metal joined body and a method for joining die-cast members.

Conventionally, as a manufacturing method of a metal joined body made by joining steel members, there is a steel member preparation step in which two steel members (metal members) are prepared, and a process in which the two steel members are joined with the surfaces to be joined in the two steel members aligned. a joined body forming step of joining two steel members to each other to form a metal joined body by heating the two steel members to a first temperature at which the two steel members can be joined while pressing under predetermined pressure conditions. known (for example, see Patent Document 1).

Patent No. 5198458

By the way, die casting is one of the widely used metal forming methods. According to die casting, by press-fitting molten metal into a mold, it is possible to manufacture metal members with high dimensional accuracy in a short time (high cycle).

Metal members manufactured by die casting (hereinafter referred to as die-cast members) are often treated as final products, either as they are or after being subjected to simple processing and treatment, taking advantage of their high dimensional accuracy. On the other hand, since die casting is also one of the metal mold casting methods, there are restrictions on the shapes of parts that can be manufactured. For example, it is impossible to manufacture a member with an external shape that does not come out of the mold or a member with a complicated internal shape (for example, a heat exchange medium flow path) using only die casting using current technology.

For this reason, by applying the conventional manufacturing method of metal joints, which involves joining multiple metal members to manufacture metal joints, to die-cast parts, members with various external and internal shapes (metal It is thought that it will be possible to manufacture a bonded body).

However, it is not common to join die-cast members. One of the reasons for this is the properties of the metal materials used in die casting. Metal materials with relatively low melting points are used in die casting, and common materials include aluminum or aluminum alloys (hereinafter collectively referred to as "aluminum-based materials"). Aluminum-based materials have the characteristics that they are softer than steel materials and have a strong oxide film on their surfaces. Although these features are advantageous, they also present difficulties from the point of view of performing bonding. In particular, the softness of aluminum-based materials causes pressure to escape during bonding and deformation of die-cast members.

The present invention has been made in view of the above-mentioned problems, and provides a method for manufacturing a metal bonded body and a die-cast member, which are capable of suppressing pressure escape during joining and deformation of the die-cast member made of an aluminum-based material. The purpose of this invention is to provide a method for joining.

The method for manufacturing a metal joined body of the present invention includes preparing a first die-casting member made of an aluminum-based material and having a first intended joining surface, and a second die-casting member made of an aluminum-based material and having a second intended joining surface. a member preparation step, and a state in which a first deformation suppressing member that suppresses deformation of the first die-casting member and the first die-casting member are combined, and the first joining surface and the second joining surface are in contact with each other; By pressing the first die-casting member and the second die-casting member relatively so that pressure is applied to the first and second joining surfaces, the first die-casting member and the second die-casting member are pressed together. The method is characterized in that it includes a metal bonded body forming step of forming a metal bonded body by diffusion bonding the metal bonded body with the second die cast member.

The method for joining die-cast members of the present invention includes combining a first die-cast member made of an aluminum-based metal and having a first planned joining surface and a first deformation suppressing member that suppresses deformation of the first die-cast member; The first joint surface and the second joint surface are in contact with the second joint surface of a second die-cast member made of aluminum-based metal and having a second joint surface. Forming a metal bonded body by diffusion bonding the first die-casting member and the second die-casting member by relatively pressing the first die-casting member and the second die-casting member so that pressure is applied. It is characterized by

In the method for manufacturing a metal bonded body of the present invention, the first die-cast member and the second die-cast member are relative to each other in a state in which the first die-cast member and the first deformation suppressing member that suppresses deformation of the first die-cast member are combined. By pressing the first die-cast member and the second die-cast member, the first die-cast member and the second die-cast member are diffusion-bonded to form a metal bonded body, so that the metal bonded body can suppress pressure escape and deformation of the die-cast member during bonding. This is the manufacturing method.

The method for joining die-cast members of the present invention includes relatively bonding the first die-cast member and the second die-cast member in a state in which the first die-cast member and the first deformation suppressing member that suppresses deformation of the first die-cast member are combined. Since the first die-cast member and the second die-cast member are diffusion-bonded by pressing, the die-cast member joining method can suppress pressure escape and deformation of the die-cast member during joining.

It is a figure shown in order to explain the 1st die-casting member 10 and the 2nd die-casting member 20 in Embodiment 1. FIG. 3 is a diagram shown to explain a metal bonded body forming step S20 in Embodiment 1. FIG. FIG. 3 is a diagram shown to explain a first deformation suppressing member 200 in Embodiment 1. FIG. FIG. 3 is a diagram shown to explain a second deformation suppressing member 300 in Embodiment 1. FIG. 7 is a diagram shown to explain a first die-cast member 30 and a second die-cast member 40 in Embodiment 2. FIG. 7 is a diagram shown to explain a metal bonded body forming step S21 in Embodiment 2. FIG. 7 is a diagram shown to explain a first deformation suppressing member 210 in Embodiment 2. FIG. 7 is a diagram shown to explain a second deformation suppressing member 310 in Embodiment 2. FIG. It is a figure shown in order to explain the 1st die-casting member 50 and the 2nd die-casting member 60 in Embodiment 3. 7 is a diagram shown to explain a metal bonded body forming step S22 in Embodiment 3. FIG. It is a figure shown in order to explain the 2nd die-casting member 60a and the 2nd deformation suppression member 320 in Embodiment 4. FIG. 7 is a diagram shown to explain a metal joined body forming step S24 in Embodiment 4. It is a figure shown in order to explain the 2nd die-casting member 60b in Embodiment 5. FIG. 7 is a diagram shown to explain a metal bonded body forming step S25 in Embodiment 5. It is a figure shown in order to explain the 1st die-casting member 80 and the 2nd die-casting member 90 in Embodiment 6. It is a figure shown in order to explain metal joined body formation process S26 in Embodiment 6.

Hereinafter, the method for manufacturing a metal joined body and the method for joining die-cast members of the present invention will be described based on each embodiment shown in the drawings. Each drawing is a schematic diagram and does not necessarily strictly reflect the actual structure, composition, ratio, etc. Each embodiment described below does not limit the claimed invention. Furthermore, not all of the elements and combinations thereof described in each embodiment are essential to the present invention. In the following description, the same reference numerals will be used across the embodiments for components that can be considered to be substantially equivalent, and repeated description will be omitted.

[Embodiment 1]
FIG. 1 is a diagram shown to explain a first die-cast member 10 and a second die-cast member 20 in Embodiment 1. FIG. 1(a) is a perspective view (isometric view) of the first die-casting member 10, FIG. 1(b) is a plan view of the first die-casting member 10, and FIG. 1(c) is a perspective view of the first die-casting member 10. FIG. 1(d) is an enlarged sectional view showing the surface of the first joining surface 12, and FIG. 1(e) is a perspective view of the second die-cast member 20. FIG. 1(f) is a plan view of the second die-cast member 20, FIG. 1(g) is a cross-sectional view taken along A2-A2 in FIG. 1(f), and FIG. 1(h) is a plan view of the second die-cast member 20. FIG. 2 is an enlarged cross-sectional view showing the state of the surface of a surface 22 to be joined.
FIG. 2 is a diagram shown to explain the metal bonded body forming step S20 in the first embodiment. FIG. 2(a) is a sectional view showing a state in which the first die-casting member 10 and the second die-casting member 20 are pressed relative to each other, and FIG. 2(b) is a sectional view showing the first joining surface 12 and the second die-casting member 20 when pressed. FIG. 2(c) is an enlarged sectional view showing the state of the second bonding surface 22, FIG. 2(c) is a sectional view showing the metal bonded body 100 formed by diffusion bonding, and FIG. 2(d) is a bonding interface after bonding. FIG. The symbol P and thick arrows in FIG. 2A indicate that the first die-casting member 10 and the second die-casting member 20 are pressed against each other. The symbol P and thick arrows have the same meaning in "diagrams shown for explaining the metal bonded body forming process" described later. Although the two-dot chain line in FIGS. 2(c) and 2(d) indicates the bonding interface, this indication does not indicate that the bonding interface remains in the metal bonded body 100, but rather This is to clearly show that 100 is manufactured from two parts. This also applies to "diagrams shown for explaining the metal bonded body forming process" which will be described later.
FIG. 3 is a diagram shown to explain the first deformation suppressing member 200 in the first embodiment. 3(a) is a perspective view of the first deformation suppressing member 200, FIG. 3(b) is a plan view of the first deformation suppressing member 200, and FIG. 3(c) is A3- It is an A3 sectional view. In FIG. 3A, portions of the shape of the inner space that are not directly visible are indicated by broken lines. The same applies when a member having a space or a joining recess is illustrated in each perspective view described later.
FIG. 4 is a diagram shown to explain the second deformation suppressing member 300 in the first embodiment. 4(a) is a perspective view of the second deformation suppressing member 300, FIG. 4(b) is a plan view of the second deformation suppressing member 300, and FIG. 4(c) is an A4- It is an A4 sectional view.

The method for manufacturing a metal bonded body according to Embodiment 1 includes a metal member preparation step S10 and a metal bonded body formation step S20. Furthermore, the die-cast member joining method according to the first embodiment corresponds to the metal joined body forming step S20. Each step will be explained below.

1. Metal member preparation step S10
The metal member preparation step S10 is a step of preparing a first die-casting member 10 made of an aluminum-based material and having a first joining surface 12, and a second die-casting member 20 made of an aluminum-based material and having a second joining surface 22. (See Figure 1.) Any material can be used as the aluminum-based material constituting the first die-cast member 10 and the second die-cast member 20. Note that the first die-cast member 10 and the second die-cast member 20 may be made of the same material or may be made of different materials as long as they are made of an aluminum-based material.

"Die-cast member" in this specification refers to a metal member manufactured by die-casting. In this specification, the term "die-cast member" includes those that have been subjected to post-processing (for example, deburring or drilling) to the extent that the overall shape does not change significantly. Various materials can be used as the aluminum-based material constituting the first die-cast member 10 and the second die-cast member 20. A specific example is an ADC-based material (particularly ADC12), which is a casting alloy. According to the method of the present invention, it has been found that a metal bonded body with high bonding strength can be obtained for a die-cast member made of ADC12.

In the metal member preparation step S10, the first die-cast member 10 and the second die-cast member 20 are prepared in which the first and second intended joining

surfaces

12 and 22 each have a predetermined surface roughness (FIG. 1 (d) and FIG. 1(h)). Note that since FIGS. 1(d) and 1(h) are schematic diagrams, the size, ratio, shape, etc. of the surface irregularities are not limited to those shown.

In this specification, the "predetermined surface roughness" means that when the second die-casting member is pressed relatively to the first die-casting member in the metal bonding body forming process described later, the first joining surface and the second Roughness that tends to cause changes in surface microstructure such as deformation, destruction, and slippage of irregularities on the surface of the surface to be joined. Although the preferable value for the predetermined surface roughness varies depending on the type of material, the required bonding strength, etc., it is generally considered preferable that Ra=0.05 μm or more. Note that the term "surface microstructure" in this specification refers to a surface structure on an atomic scale.

The first die-casting member 10 and the second die-casting member 20, each of which has a predetermined surface roughness, a first joining surface 12 and a second joining surface 22, are formed by, for example, a process of colliding a projectile material (granules) (so-called shot It can be prepared by carrying out (blasting). Conditions such as the material of the shot material, the particle size, and the speed at which the shot material is made to collide can be arbitrarily determined depending on the type of aluminum material constituting the first die-cast member 10 and the second die-cast member 20, etc. . Regarding the material of the projectile material, for example, particles made of an aluminum material or a steel material can be suitably used. In addition, in order to make the first joint surface 12 and the second joint surface 22 each have a predetermined surface roughness, a process other than shot blasting may be performed.

2. Metal joined body forming step S20
In the metal bonding body forming step S20, the first bonding surface 12 and the second bonding surface 22 are in contact with each other, and the first bonding surface 12 and the second bonding surface 22 are heated so that pressure is applied to the first bonding surface 12 and the second bonding surface 22. By relatively pressing the first die-casting member 10 and the second die-casting member 20 (see FIG. 2(a)), the first die-casting member 10 and the second die-casting member 20 are diffusion-bonded to form a metal bonded body 100. (see FIGS. 2(c) and 2(d)).

In this specification, "relatively pressing the first die-casting member and the second die-casting member" refers only to pressing the first die-casting member by fixing it and applying a moving force to the second die-casting member. It's not a thing. It also includes pressing by fixing the second die-casting member and applying a moving force to the first die-casting member, and pressing by applying a moving force to both the first die-casting member and the second die-casting member.

In the metal joined body forming step S20, the first die cast member 10 and the second die cast member 20 are combined with the first die cast member 10 and the first deformation suppressing member 200 that suppresses deformation of the first die cast member 10. (see FIG. 2(a)).

The first deformation suppressing member 200 is a member that suppresses deformation of the first die-casting member 10 at least in a direction perpendicular to the pressing direction in which the first die-casting member 10 and the second die-casting member 20 are pressed relative to each other. (See Figure 3.) The first deformation suppressing member 200 can also be expressed as a member that can cover at least the side surface of the first die-casting member 10. The first deformation suppressing member 200 in the first embodiment is a member that can also cover the bottom surface of the first die-casting member 10. In the first deformation suppressing member 200, a space corresponding to the outer shape of the side and bottom surfaces of the first die-casting member 10 is formed. The first deformation suppressing member 200 is made of a material that is less deformable than the material that makes up the first die-casting member 10 . Examples of such materials include steel, cemented carbide, and ceramics.

The first deformation suppressing member 200 has a shape that matches the shape of the first die-casting member 10 (the external shape of the side and bottom surfaces) at the temperature when the first die-casting member 10 and the second die-casting member 20 are diffusion bonded. Then, in the metal joined body forming step S20, after the temperature of the first die-cast member 10 and the first deformation suppressing member 200 reaches the temperature at which the first die-cast member 10 and the second die-cast member 20 are diffusion-bonded, the first die-cast member 10 and the first deformation suppressing member 200 are The die cast member 10 and the first deformation suppressing member 200 are combined.

In addition, in the metal joined body forming step S20, the first die-cast member 10 and the second die-cast member The member 20 is pressed relatively (see FIG. 2(a)).

The second deformation suppressing member 300 is a member that suppresses deformation of the second die-casting member 20 at least in a direction perpendicular to the pressing direction in which the first die-casting member 10 and the second die-casting member 20 are pressed relative to each other. (See Figure 4.) The second deformation suppressing member 300 can also be expressed as a member that can cover at least the side surface of the second die-casting member 20. The second deformation suppressing member 300 in the first embodiment is a member that can also cover the upper surface of the second die-casting member 20. In the second deformation suppressing member 300, a space corresponding to the outer shape of the side and top surfaces of the second die-casting member 20 is formed. The second deformation suppressing member 300 is made of a material that is less deformable than the material that makes up the second die-casting member 20 . Examples of such materials include steel, cemented carbide, and ceramics, as in the case of the first deformation suppressing member 200.

The second deformation suppressing member 300 has a shape that matches the shape of the second die-cast member 20 at the temperature when the first die-cast member 10 and the second die-cast member 20 are diffusion bonded. Then, in the metal joined body forming step S20, after the temperature of the second die-casting member 20 and the second deformation suppressing member 300 reaches the temperature required for diffusion bonding the first die-casting member 10 and the second die-casting member 20, The die cast member 20 and the second deformation suppressing member 300 are combined.

The shapes of the first deformation suppressing member 200 and the second deformation suppressing member 300 can be formed relatively easily by repurposing the shape of a part of the die casting mold in which the first die casting member 10 and the second die casting member 20 were manufactured. It is possible to design However, it is necessary to consider the degree of thermal expansion of the first die-casting member 10 and the second die-casting member 20 and the first deformation suppressing member 200 and the second deformation suppressing member 300 at the respective temperatures at the time of joining. In addition, in FIGS. 1 and 2, the surfaces other than the first planned joining surface 12 of the first die-casting member 10 and the surfaces other than the second planned joining surface 22 of the second die-casting member 20 are surfaces of very simple shapes (planar surfaces). ), however, for example, an uneven structure or the like may be present on these surfaces for exerting a mechanical function or an electrical function. In this case, the shapes of the first deformation suppressing member 200 and the second deformation suppressing member 300 also correspond to the uneven structure and the like. This also applies to surfaces other than the first planned bonding surface of the first die-cast member and surfaces other than the second planned bonding surface of the second die-cast member in each embodiment described later.

In addition, in FIG. 2(a), when the first die-casting member 10 and the second die-casting member 20 are pressed relative to each other, the first deformation suppressing member 200 and the second deformation suppressing member 300 are in contact with each other. Although shown in the figure, the present invention is not limited thereto. In order to apply sufficient pressure to the first and second

joint surfaces

12 and 22, the first deformation suppressing member 200 and the second deformation suppressing member 300 do not come into contact with each other when pressed. Good too.

The first deformation suppressing member 200 and the second deformation suppressing member 300 are removed after the metal bonded body 100 is formed by diffusion bonding (see FIG. 2(c)).

In the metal bonding body forming step S20, by relatively pressing the first die-casting member 10 and the second die-casting member 20, a change in the surface microstructure is caused on the first intended joining surface 12 and the second intended joining surface 22. The first die-casting member 10 and the second die-casting member 20 are diffusion-bonded to form the metal bonded body 100 while generating the metal. Changes in the surface microstructure include deformation, destruction, slippage, etc. of irregularities, and these promote diffusion bonding (see FIG. 2(b)).

In the metal joined body forming step S20, the first die cast member 10 and the second die cast member 20 are heated in order to promote diffusion bonding, and the first die cast member 10 and the second die cast member 20 are heated to a certain temperature (however, below the melting point). It is preferable to carry out the process while maintaining the temperature at . That is, in the metal bonded body forming step S20, the first die-cast member 10 and the second die-cast member 20 are formed under temperature conditions that allow diffusion bonding (preferably under temperature conditions suitable for diffusion bonding). 10 and the second die-casting member 20 are preferably pressed relative to each other.

Temperature conditions suitable for diffusion bonding differ mainly depending on the type of aluminum-based material that constitutes the first die-cast member 10 and the second die-cast member 20. For example, when the aluminum-based material is ADC12, the temperature can be about 500 to 550°C. In addition, the optimum value for the pressure to be applied will vary depending on the type of aluminum material forming the first die-casting member 10 and the second die-casting member 20, the shapes of the first die-casting member 10 and the second die-casting member 20, the joining temperature, etc. Although it is difficult to give an appropriate value because the pressure varies, it is thought that a pressure on the order of approximately MPa is required.

In order to diffusion bond the first die cast member 10 and the second die cast member 20 and obtain high bonding strength, it is necessary to maintain the temperature and pressure to a certain extent. The time varies depending on the type of aluminum material forming the first die-cast member 10 and the second die-cast member 20, the shapes of the first die-cast member 10 and the second die-cast member 20, bonding temperature, pressure, etc., but for example, The time can be about 10 minutes to 3 hours.

It is preferable that the metal bonded body forming step S20 is carried out in a vacuum or in an inert gas. Further, it is also preferable that the metal bonded body forming step S20 is performed in the presence of air.

3. Effects of the method for manufacturing a metal joined body and the method for joining die cast members according to the first embodiment The method for manufacturing a metal joined body according to the first embodiment has the first die cast member 10 and the first die cast member 10 that suppress deformation of the first die cast member 10. By relatively pressing the first die-casting member 10 and the second die-casting member 20 in a state where the deformation suppressing member 200 is combined, the first die-casting member 10 and the second die-casting member 20 are diffusion-bonded to form a metal. Since the joined body 100 is formed, the metal joined body manufacturing method is capable of suppressing pressure escape and deformation of the die-cast member (at least the first die-cast member 10) during joining.

Further, according to the method for manufacturing a metal bonded body according to the first embodiment, the first deformation suppressing member 200 is perpendicular to the pressing direction in which at least the first die-casting member 10 and the second die-casting member 20 are pressed relative to each other. Since the first die-casting member 10 is prevented from being deformed in the direction of It becomes possible to further suppress the escape of pressure.

Further, according to the method for manufacturing a metal bonded body according to the first embodiment, the first deformation suppressing member 200 is capable of bonding the first die-casting member 10 and the second die-casting member 20 at a temperature when the first die-casting member 10 and the second die-casting member 20 are diffusion-bonded. In the metal joined body forming step S20, the temperature at which the first die-cast member 10 and the first deformation suppressing member 200 diffusely bond the first die-cast member 10 and the second die-cast member 20 is Since the first die-casting member 10 and the first deformation suppressing member 200 are then combined, it is possible to suppress the first die-casting member 10 from being deformed by using the first deformation suppressing member 200. It becomes possible.

Further, according to the method for manufacturing a metal bonded body according to the first embodiment, in the metal bonded body forming step S20, the second die-casting member 20 and the second deformation suppressing member 300 that suppresses deformation of the second die-casting member 20 are provided. Since the first die-casting member 10 and the second die-casting member 20 are relatively pressed in the combined state, it is possible to further suppress the escape of pressure during joining, and the second die-casting member 20 is also It becomes possible to suppress deformation.

Further, according to the method for manufacturing a metal bonded body according to the first embodiment, the second deformation suppressing member 300 is perpendicular to the pressing direction in which at least the first die-casting member 10 and the second die-casting member 20 are pressed relative to each other. Since the second die-cast member 20 is prevented from being deformed in the direction of It becomes possible to further suppress the escape of pressure.

Further, according to the method for manufacturing a metal bonded body according to the first embodiment, the second deformation suppressing member 300 is able to bond the second die-casting member 20 to the second die-casting member 20 at the temperature at which the first die-casting member 10 and the second die-casting member 20 are diffusion-bonded. In the metal joined body forming step S20, the temperature at which the second die-casting member 20 and the second deformation suppressing member 300 bond the first die-casting member 10 and the second die-casting member 20 by diffusion bonding is Since the second die-casting member 20 and the second deformation suppressing member 300 are then combined, it is possible to suppress the second die-casting member 20 from being deformed by using the second deformation suppressing member 300. It becomes possible.

Further, according to the method for manufacturing a metal joined body according to the first embodiment, in the metal member preparation step S10, the first die-casting member 10 and the second die-casting member 20 are formed as the first joining surface 12 and the second joining surface. 22 each having a predetermined surface roughness, and in the metal bonding body forming step S20, the first die-casting member 10 and the second die-casting member 20 are relatively pressed to form the first joining surface. In order to form the metal bonded body 100 by diffusion bonding the first die-casting member 10 and the second die-casting member 20 while causing a change in the surface microstructure on the first and second bonding surfaces 12 and 22, the first bonding surface 22 is By utilizing the unevenness of the surfaces of the first bonding surface 12 and the second bonding surface 22 to generate changes in the surface microstructure, it is possible to further increase the bonding strength.

Further, according to the method for manufacturing a metal bonded body according to the first embodiment, in the metal bonded body forming step S20, the first die cast member 10 and the second die cast member 20 are bonded under temperature conditions (preferably When pressing the first die-casting member 10 and the second die-casting member 20 relatively (under temperature conditions suitable for diffusion bonding), the first die-casting member 10 and the second die-casting member 20 are diffusion-bonded at the time of pressing. Since the conditions are easy, it is possible to further increase the bonding strength.

Further, according to the method for manufacturing a metal bonded body according to Embodiment 1, when the metal bonded body forming step S20 is performed in the presence of air, compared with the case where the process is performed in a vacuum or in an inert gas. This makes it possible to simplify the process and reduce costs.

The method for joining die-cast members according to the first embodiment is to join the first die-cast member 10 and the second die-cast member in a state in which the first die-cast member 10 and the first deformation suppressing member 200 that suppresses deformation of the first die-cast member 10 are combined. The first die-cast member 10 and the second die-cast member 20 are diffusion-bonded by relatively pressing the member 20, so that the die-cast member can suppress pressure escape and deformation of the die-cast member during bonding. This is the joining method.

[Embodiment 2]
FIG. 5 is a diagram shown to explain the first die-cast member 30 and the second die-cast member 40 in the second embodiment. 5(a) is a perspective view of the first die-casting member 30, FIG. 5(b) is a plan view of the first die-casting member 30, and FIG. 5(c) is a cross section taken along the line A5-A5 in FIG. 5(b). 5(d) is a perspective view of the second die-casting member 40, FIG. 5(e) is a plan view of the second die-casting member 40, and FIG. 5(f) is a perspective view of the second die-casting member 40. It is an A6-A6 sectional view.
FIG. 6 is a diagram shown to explain the metal bonded body forming step S21 in the second embodiment. FIG. 6(a) is a cross-sectional view showing a state in which the first die-casting member 30 and the second die-casting member 40 are pressed relative to each other, and FIG. 6(b) is a sectional view showing a metal bonded body 110 formed by diffusion bonding. FIG.
FIG. 7 is a diagram shown to explain the first deformation suppressing member 210 in the second embodiment. 7(a) is a perspective view of the first deformation suppressing member 210, FIG. 7(b) is a plan view of the first deformation suppressing member 210, and FIG. 7(c) is a perspective view of the first deformation suppressing member 210. It is an A7 sectional view.
FIG. 8 is a diagram shown to explain the second deformation suppressing member 310 in the second embodiment. FIG. 8(a) is a perspective view of the second deformation suppressing member 310, FIG. 8(b) is a plan view of the second deformation suppressing member 310, and FIG. 8(c) is a perspective view of the second deformation suppressing member 310. It is an A8 sectional view.

The method for manufacturing a metal bonded body according to the second embodiment includes a metal member preparation step S11 and a metal bonded body formation step S21. Further, the die-cast member joining method according to the second embodiment corresponds to the metal joined body forming step S21. Each step will be explained below.

1. Metal member preparation step S11
The metal member preparation step S11 is a step of preparing a first die-cast member made of an aluminum-based material and having a first joint surface, and a second die-cast member made of an aluminum-based material and having a second joint surface. This step is similar to the metal member preparation step S10 in Embodiment 1, but differs from the metal member preparation step S10 in Embodiment 1 in the following points. That is, in the metal member preparation step S11, the first die-cast member 30 is a joining recess in which at least a portion of the inner surface is a first inclined surface that is angled with respect to the pressing direction in the metal joined body forming step S21. 32 is prepared (see FIGS. 5(a) to 5(c)). Note that the joining recess 32 does not have a bottom and is shaped like a through hole. In addition, in the metal member preparation step S11, the second die-cast member 40 is formed such that at least a part of the side surface is a second inclined surface with an angle corresponding to the first inclined surface, and when inserted into the joining recess 32. 5(d) to 5(f)).

The first inclined surface and the second inclined surface in Embodiment 2 can also be said to be tapered surfaces. The taper angles of the first inclined surface and the second inclined surface are determined by the type of aluminum-based material constituting the first die-cast member 30 and the second die-cast member 40, the metal bonded body 110 to be manufactured (or the processing of the metal bonded body 110). The angle can be set to any desired angle depending on the shape of the product (product manufactured by the manufacturer).

At least a portion of the first inclined surface is the first planned joining surface 34. Furthermore, at least a portion of the second inclined surface is the second joining surface 44 . In the method for manufacturing a metal bonded body according to the second embodiment, the portion of the first slope and the second slope that abuts when the bonding convex portion 42 is inserted into the bonding recess 32 and the metal bonded body forming step S21. The portions that come into contact with each other by pressing are the first planned joining surface 34 and the second planned joining surface 44.

Although the reason will be described later, the first planned bonding surface 34 of the first die-cast member 30 and the second planned bonding surface 44 of the second die-cast member 40 are the same as the first planned bonding surface 12 and the second planned bonding surface 22 in the first embodiment. There is no problem even if the surface does not have a predetermined surface roughness.

2. Metal joined body forming step S21
In the metal bonded body forming step S21, the first die-casting member 30 and the second die-casting member 40 are relatively pressed while the bonding convex portion 42 is inserted into the bonding recess 32 (see FIG. 6(a)). ), the first die-casting member 30 and the second die-casting member 40 are diffusion-bonded to form a metal bonded body 110 while causing a change in the surface microstructure on the first and second intended joining

surfaces

34 and 44. (See FIG. 6(b).)

When the first die-casting member 30 and the second die-casting member 40 are pressed relative to each other with the joining convex portion 42 inserted into the joining recess 32, the first and second joining

surfaces

34 and 44 have the following properties: Not only pressure in the opposing direction but also force due to displacement will be applied. Therefore, more complex forces are applied to the first and second bonding surfaces 34 and 44 than in the first embodiment, and changes in the surface microstructure are promoted. Therefore, in the metal bonding body forming step S21, even if the first planned bonding surface 34 and the second planned bonding surface 44 do not have a predetermined surface roughness, changes in the surface microstructure are likely to occur. .

In addition, in the metal joined body forming step S21, the first die-casting member 30 and the first deformation suppressing member 210 are combined, and the second die-casting member 40 and the second deformation suppressing member 310 are combined, and the first die-casting member 30 and the first deformation suppressing member 310 are combined. The die cast member 30 and the second die cast member 40 are pressed relatively (see FIG. 6(a)).

The first deformation suppressing member 210 basically has the same configuration as the first deformation suppressing member 200 in Embodiment 1, but corresponds to the shape of the first die-cast member 30 and has a shape shown in FIG. 7. Further, the second deformation suppressing member 310 basically has the same configuration as the second deformation suppressing member 300 in the first embodiment, but corresponds to the shape of the second die-casting member 40 and has a shape shown in FIG. 8. .

Note that in the metal bonded body forming step S21, similarly to the metal bonded body forming step S20 in Embodiment 1, after the first die casting member 30 and the second die casting member 40 reach a temperature at which diffusion bonding is possible, the first die casting is performed. It is preferable to press the member 30 and the second die-cast member 40 relatively.

3. Effects of the method for manufacturing a metal joined body and the method for joining die cast members according to the second embodiment The method for manufacturing a metal joined body according to the second embodiment has the first die cast member 30 and the first die cast member 30 that suppress deformation of the first die cast member 30. By relatively pressing the first die-casting member 30 and the second die-casting member 40 in a state in which the deformation suppressing member 210 is combined, the first die-casting member 30 and the second die-casting member 40 are diffusion-bonded to form metal. In order to form the joined body 110, similarly to the method for manufacturing a metal joined body according to the first embodiment, a metal that can suppress pressure escape and deformation of the die cast member (at least the first die cast member 30) during joining is used. This is a method for manufacturing a joined body.

Further, according to the method for manufacturing a metal bonded body according to the second embodiment, in the metal member preparation step S11, at least a portion of the inner surface of the first die-cast member 30 is A die-casting member 40 is prepared in which a joining recess 32 is formed as an angled first inclined surface, and at least a part of the side surface is angled to correspond to the first inclined surface. Prepare a joint convex part 42 which is a second slope and has a shape in which the first slope and the second slope come into contact when inserted into the joint recess 32, and At least a part is the first planned joining surface 34, and at least a part of the second inclined surface is the second planned joining surface 44. By relatively pressing the first die-casting member 30 and the second die-casting member 40 in the inserted state, while causing a change in the surface microstructure on the first planned joining surface 34 and the second planned joining surface 44, Since the metal bonded body 110 is formed by diffusion bonding the first die-cast member 30 and the second die-cast member 40, the pressure and displacement between the first and second bonding surfaces 34 and 44 that occur during pressing occurs. By utilizing this to generate changes in the surface microstructure, it is possible to further increase the bonding strength.

Note that the method for manufacturing a metal bonded body according to the second embodiment also has the corresponding effects among the effects that the method for manufacturing a metal bonded body according to the first embodiment has.

The method for joining die-cast members according to the second embodiment is to join the first die-cast member 30 and the second die-cast member in a state in which the first die-cast member 30 and the first deformation suppressing member 210 that suppresses deformation of the first die-cast member 30 are combined. Since the first die-cast member 30 and the second die-cast member 40 are diffusion-bonded by pressing the member 40 relative to each other, pressure relief during joining is achieved similarly to the die-cast member joining method according to Embodiment 1. The present invention provides a method for joining die-cast members that can suppress deformation of the die-cast members.

[Embodiment 3]
FIG. 9 is a diagram shown to explain the first die-cast member 50 and the second die-cast member 60 in Embodiment 3. 9(a) is a perspective view of the first die-casting member 50, FIG. 9(b) is a plan view of the first die-casting member 50, and FIG. 9(c) is a cross section taken along the line A9-A9 in FIG. 9(b). 9(d) is a perspective view of the second die-casting member 60, FIG. 9(e) is a plan view of the second die-casting member 60, and FIG. 9(f) is a perspective view of the second die-casting member 60. It is a sectional view taken along A10-A10.
FIG. 10 is a diagram shown to explain the metal bonded body forming step S22 in the third embodiment. FIG. 10(a) is a sectional view showing a state in which the first die-casting member 50 and the second die-casting member 60 are pressed relative to each other, and FIG. 10(b) is a sectional view showing a state in which the first die-casting member 50 and the second die-casting member 60 are pressed against each other, and FIG. 10(c) is a sectional view showing a state in which two bonding surfaces 68 are in contact, and FIG. 10(c) is a sectional view showing a metal bonded body 120 formed by diffusion bonding.

The method for manufacturing a metal bonded body according to Embodiment 3 includes a metal member preparation step S12 and a metal bonded body formation step S22. Further, the die-cast member joining method according to the third embodiment corresponds to the metal joined body forming step S22. Each step will be explained below.

1. Metal member preparation step S12
The metal member preparation step S12 is a step of preparing a first die-cast member made of an aluminum-based material and having a first joint surface, and a second die-cast member made of an aluminum-based material and having a second joint surface. This step is similar to the metal member preparation step S10 in Embodiment 1 and the metal member preparation step S11 in Embodiment 2, but differs from these in the following points. That is, in the metal member preparation step S12, the first die-cast member 50 is a joining recess in which at least a portion of the inner surface is a first inclined surface that is angled with respect to the pressing direction in the metal joined body forming step S22. 52 is prepared, and the bonding recess 52 has a bottom (see FIGS. 9(a) to 9(c)). In the first die-cast member 50 as well, at least a portion of the first inclined surface is the first planned joining surface 54 , and the bottom surface of the joining recess 52 is also the first planned joining surface 58 .

In addition, in the metal member preparation step S12, the second die-cast member 60 is formed so that at least a part of the side surface is a second inclined surface with an angle corresponding to the first inclined surface, and when inserted into the joining recess 52. A bonding convex portion 62 having a shape in which a first inclined surface and a second inclined surface abut each other is prepared. In the second die-cast member 60 as well, at least a part of the second inclined surface is the second planned joining surface 64, but the tip surface of the joining convex part 62 is also the second planned joining surface 68 (FIG. 9(d) )~See Figure 9(f).)

The first planned bonding surface 54 of the first die-cast member 50 and the second planned bonding surface 64 of the second die-cast member 60 have a predetermined surface roughness as in the case of the metal member preparation step S11 in the second embodiment. Although they may be omitted, the first scheduled joining surface 58 and the second scheduled joining surface 68 have a predetermined surface roughness, similar to the first scheduled joining surface 12 and the second scheduled joining surface 22 in the first embodiment.

Note that the external dimensions of the first die-cast member 50 are the same as those of the first die-cast member 30 in the second embodiment, and in the metal joined body forming step S22, the first deformation suppression member 210 in the second embodiment is It is assumed that the member 210 can be used (see FIGS. 10(a) and 10(b)). Further, the external dimensions of the second die-casting member 60 are also the same as those of the second die-casting member 40 in the second embodiment, and in the metal joined body forming step S22, the second deformation suppressing member 310 in the second embodiment is used. It is assumed that member 310 can be used.

Although not shown in the drawings, air vent holes and grooves may be formed in the joining recess 52 of the first die-cast member 50 and the second inclined surface of the second die-cast member 60 as necessary. Further, a hole connected to the air vent hole may be formed in the first deformation suppressing member 210.

2. Metal joined body forming step S22
In the metal bonded body forming step S22, a metal bonded body is formed by diffusion bonding the first die-cast member and the second die-cast member while causing a change in the surface microstructure on the first and second bonded surfaces. Although this step is similar to the metal bonded body forming step S21 in the second embodiment, it differs from the metal bonded body forming step S21 in the second embodiment in the following points. That is, in the metal joined body forming step S22, the first die-cast member 50 and the second die-cast member 60 are relatively pressed with the joining convex part 62 inserted into the joining recess 52 (FIG. 10(a)). reference.). As a result, the first planned joining surface 58 and the second planned joining surface 68 come into contact (see FIG. 10(b)). Therefore, not only the first and second bonding surfaces 54 and 64 but also the first and second bonding surfaces 58 and 68 are diffusion bonded to form the metal bonded body 120 (see FIG. 10). c). Note that the principle by which the first and second bonding surfaces 58 and 68 are diffusion bonded is the same as in the first embodiment.

3. Effects of the method for manufacturing a metal joined body and the method for joining die cast members according to the third embodiment The method for manufacturing a metal joined body according to the third embodiment has the first die cast member 50 and the first die cast member 50 that suppress deformation of the first die cast member 50 By relatively pressing the first die-casting member 50 and the second die-casting member 60 in a state in which the deformation suppressing member 210 is combined, the first die-casting member 50 and the second die-casting member 60 are diffusion-bonded to form metal. In order to form the joined body 120, it is possible to suppress pressure escape and deformation of the die-cast member (at least the first die-cast member 50) during joining, similar to the method for manufacturing a metal joined body according to

Embodiments

1 and 2. This is a method for manufacturing a metal bonded body.

According to the method for manufacturing a metal bonded body according to the third embodiment, in the metal member preparation step S12, the first die-casting surface 58 and the second bonding surface 68 each have a predetermined surface roughness. The member 50 and the second die-cast member 60 are prepared, and in the metal joined body forming step S22, the first die-cast member 50 and the second die-cast member 60 are relatively pressed, thereby forming the first joining surface 58 and the second die-casting member 60. In order to form the metal bonded body 120 by diffusion bonding the first die-cast member 50 and the second die-cast member 60 while causing a change in the surface microstructure on the two planned-to-

be-joined surfaces

58 and 68, By utilizing the unevenness of the surface of the two planned surfaces 68 to be bonded to generate changes in the surface microstructure, it is possible to further increase the bonding strength.

Further, according to the method for manufacturing a metal bonded body according to the third embodiment, in the metal member preparation step S12, at least a part of the inner surface of the first die-cast member 50 is A die-cast member 60 is prepared in which a joining recess 52 is formed as an angled first inclined surface, and at least a part of the side surface is angled to correspond to the first inclined surface. A connector having a joining convex portion 62 which is a second inclined surface and has a shape in which the first inclined surface and the second inclined surface abut against each other when inserted into the joining recess 52 is prepared. At least a portion of the surface is the first surface to be joined 54, and at least a portion of the second inclined surface is the second surface to be joined 64. By relatively pressing the first die-casting member 50 and the second die-casting member 60 in the inserted state, while causing a change in the surface microstructure on the first planned joining surface 54 and the second planned joining surface 64, Since the first die-casting member 50 and the second die-casting member 60 are diffusion-bonded to form the metal bonded body 120, the pressure and displacement between the first and second bonding surfaces 54 and 64 that occur during pressing occur. By utilizing this to generate changes in the surface microstructure, it is possible to further increase the bonding strength.

Note that the method for manufacturing a metal bonded body according to Embodiment 3 also has the corresponding effects among the effects that the methods for manufacturing a metal bonded body according to

Embodiments

1 and 2 have.

The method for joining die-cast members according to the third embodiment is to join the first die-cast member 50 and the second die-cast member in a state in which the first die-cast member 50 and the first deformation suppressing member 210 that suppresses deformation of the first die-cast member 50 are combined. In order to diffusion-bond the first die-cast member 50 and the second die-cast member 60 by relatively pressing the member 60, the pressure at the time of joining is This is a method for joining die-cast members that can suppress run-off and deformation of the die-cast member.

[Embodiment 4]
FIG. 11 is a diagram shown to explain the second die-casting member 60a and the second deformation suppressing member 320 in the fourth embodiment. 11(a) is a perspective view of the second die-casting member 60a, FIG. 11(b) is a plan view of the second die-casting member 60a, and FIG. 11(c) is a cross section taken along A11-A11 in FIG. 11(b). 11(d) is a perspective view of the second deformation suppressing member 320, FIG. 11(e) is a plan view of the second deforming suppressing member 320, and FIG. 11(f) is a perspective view of the second deformation suppressing member 320. ) is a sectional view taken along A12-A12.
FIG. 12 is a diagram shown to explain the metal bonded body forming step S24 in the fourth embodiment. FIG. 12(a) is a sectional view showing a state in which the first die-casting member 50 and the second die-casting member 60a are pressed relative to each other, and FIG. 12(b) is a sectional view showing a state in which the first die-casting member 50 and the second die-casting member 60a are pressed against each other, and FIG. 12(c) is a cross-sectional view showing a state in which two bonding surfaces 68 are in contact, and FIG. 12(c) is a cross-sectional view showing a metal bonded body 130 formed by diffusion bonding.

The method for manufacturing a metal joined body according to Embodiment 4 is basically the same method as the method for manufacturing a metal joined body according to Embodiment 3, except that the shapes of the second die-casting member and the second deformation suppressing member are different from each other. This is different from the method for manufacturing a metal bonded body according to the third embodiment. The method for manufacturing a metal bonded body according to the fourth embodiment includes a metal member preparation step S14 and a metal bonded body formation step S24. Further, the die-cast member joining method according to the fourth embodiment corresponds to the metal joined body forming step S24. Each step will be explained below.

In the metal member preparation step S14 in the fourth embodiment, a second die-cast member 60a in which a space 69a is formed inside the joining convex portion 62 is prepared (see FIGS. 11(a) to 11(c)). ). The second die-cast member 60a has the same configuration as the second die-cast member 60 in the third embodiment except that a space 69a is formed. In addition, in the metal member preparation step S14, a member similar to the first die-cast member 50 in Embodiment 3 is prepared as the first die-cast member 50.

The second deformation suppressing member 320 in Embodiment 4 basically has the same configuration as the second deformation suppressing member 310 in Embodiments 2 and 3, but the second deformation suppressing member 310 in Embodiments 2 and 3 has In addition to the shape, it has a portion corresponding to the inner shape (space 69a) of the second die-cast member 60a (see FIGS. 11(d) to 11(f)).

In the metal joined body forming step S24 in the fourth embodiment, when the second die-casting member 60a and the second deformation suppressing member 320 are combined, the second deformation suppressing member 320 is placed in the space 69a of the joining convex portion 62. It will be in the inserted state. In this state, the first die-casting member 50 and the second die-casting member 60a are pressed relatively (see FIGS. 12(a) and 12(b)). Like the first deformation suppressing member 210, the second deformation suppressing member 320 is removed after the metal bonded body 130 is formed by diffusion bonding (see FIG. 12(c)).

The method for manufacturing a metal joined body according to Embodiment 4 is such that the first die-casting member 50 and the second die-casting member 50 are combined with the first deformation suppressing member 210 that suppresses deformation of the first die-casting member 50. The method for manufacturing a metal bonded body according to the third embodiment is to form a metal bonded body 130 by diffusion bonding the first die cast member 50 and the second die cast member 60a by relatively pressing the die cast member 60a. Similarly, this method of manufacturing a metal bonded body is capable of suppressing pressure escape and deformation of the die-cast member (at least the first die-cast member 50) during bonding.

Note that the method for manufacturing a metal bonded body according to Embodiment 4 also has the corresponding effects among the effects that the method for manufacturing a metal bonded body according to Embodiment 3 has.

The method for joining die-cast members according to the fourth embodiment is to join the first die-cast member 50 and the second die-cast member in a state in which the first die-cast member 50 and the first deformation suppressing member 210 that suppresses deformation of the first die-cast member 50 are combined. Since the first die-cast member 50 and the second die-cast member 60a are diffusion-bonded by relatively pressing the member 60a, pressure relief during joining is achieved similarly to the die-cast member joining method according to the third embodiment. The present invention provides a method for joining die-cast members that can suppress deformation of the die-cast members.

[Embodiment 5]
FIG. 13 is a diagram shown to explain the second die-cast member 60b in the fifth embodiment. 13(a) is a perspective view of the second die-casting member 60b, FIG. 13(b) is a plan view of the second die-casting member 60b, and FIG. 13(c) is a cross section taken along A13-A13 in FIG. 13(b). It is a diagram.
FIG. 14 is a diagram shown to explain the metal bonded body forming step S25 in the fifth embodiment. FIG. 14(a) is a sectional view showing a state in which the first die-casting member 50 and the second die-casting member 60b are pressed relative to each other, and FIG. 14(b) is a sectional view showing a state in which the first die-casting member 50 and the second die-casting member 60b are pressed against each other, and FIG. 14(c) is a sectional view showing a state in which two bonding surfaces 68 are in contact, and FIG. 14(c) is a sectional view showing a metal bonded body 140 formed by diffusion bonding.

The method for manufacturing the metal bonded body according to Embodiment 5 is basically the same method as the method for manufacturing the metal bonded body according to Embodiment 3, except that the shape of the second die-cast member is different from that of metal bonding according to Embodiment 3. This is different from how the body is manufactured. The method for manufacturing a metal bonded body according to the fifth embodiment includes a metal member preparation step S15 and a metal bonded body formation step S25. Furthermore, the die-cast member joining method according to the fifth embodiment corresponds to the metal joined body forming step S25. Each step will be explained below.

In the metal member preparation step S15 in the fifth embodiment, as the second die-cast member 60b, a space is formed on the second joining surface 64 even after the metal joined body forming step S25 (even after the metal joined body 140 is formed). A remaining space forming recess 69b is formed (see FIG. 11). The space forming recess 69b in the sixth embodiment has a continuous groove shape. In addition, in the metal member preparation step S15, a member similar to the first die-cast member 50 in Embodiment 3 is prepared as the first die-cast member 50.

The metal bonded body forming step S25 in the fifth embodiment is basically the same process as the metal bonded body forming step S22 in the third embodiment, but the second die cast member 60b described above is used as the second die cast member (Fig. 14(a) and FIG. 14(b)). A space-forming recess 69b remains as a space in the metal bonded body 140 formed in this way (see FIG. 14(c)). Such a space-forming recess 69b can be used, for example, as a flow path for a heat exchange medium.

To explain in more detail, a metal joint, such as the metal joint 140, in which there is a space inside that can be used as a flow path for a heat exchange medium, is a product or a product that can adjust the temperature of itself and nearby objects. It can be used as a material for such products. For example, an object that generates heat during operation (e.g., a semiconductor device) is placed on a metal bonded body having an internal space or a product manufactured from the metal bonded body, and a heat exchange medium is circulated through the internal space. This makes it possible to cool the placed object without using bulky structures such as heat radiation fins. In addition, for example, by manufacturing the joints of a robot arm using the metal joint manufacturing method described above and circulating a heat exchange medium in the internal space, it is possible to reduce the accuracy of movement due to temperature changes during operation. It becomes possible to suppress the

Additionally, products such as those described above can also be used in systems that deliver heat to objects located far away, without wastefully discarding heat into the external environment. In such a system, for example, the above-mentioned product is placed close to a heat source (engine, etc. for vehicles equipped with an internal combustion engine, motor, inverter, converter, battery, etc. for electric vehicles) to generate heat. One possibility is to deliver the absorbed heat via a heat exchange medium to things that require it (batteries in cold conditions, air conditioners, defrosters, etc.).

Since the metal bonded body that can be manufactured by the metal bonded body manufacturing method of the present invention is obtained by joining die-cast members using a deformation suppressing member, other known manufacturing methods (for example, joining members formed by cutting) Compared to products of the same shape manufactured by methods such as 3D printers or 3D printers, this product is advantageous in terms of productivity, shape accuracy, and cost, making it suitable for mass production.

The method for manufacturing a metal bonded body according to the fifth embodiment is such that the first die-cast member 50 and the second die-cast member 50 are combined with the first deformation suppressing member 210 that suppresses deformation of the first die-cast member 50. The method for manufacturing a metal bonded body according to the third embodiment is to form a metal bonded body 140 by diffusion bonding the first die cast member 50 and the second die cast member 60b by relatively pressing the die cast member 60b. Similarly, this method of manufacturing a metal bonded body is capable of suppressing pressure escape and deformation of the die-cast member (at least the first die-cast member 50) during bonding.

Further, according to the method for manufacturing a metal bonded body according to the fifth embodiment, since the space forming recess 69b that remains as a space even after becoming the metal bonded body 140 is formed in the second bonding surface 64, It becomes possible to manufacture a metal joined body having a complicated internal shape.

Note that the method for manufacturing a metal bonded body according to Embodiment 5 also has the corresponding effects among the effects that the method for manufacturing a metal bonded body according to Embodiment 3 has.

The method for joining die-cast members according to the fifth embodiment is to join the first die-cast member 50 and the second die-cast member in a state in which the first die-cast member 50 and the first deformation suppressing member 210 that suppresses deformation of the first die-cast member 50 are combined. Since the first die-cast member 50 and the second die-cast member 60b are diffusion-bonded by pressing the member 60b relative to each other, pressure relief during bonding is achieved similarly to the die-cast member bonding method according to the third embodiment. The present invention provides a method for joining die-cast members that can suppress deformation of the die-cast members.

[Embodiment 6]
FIG. 15 is a diagram shown to explain a first die-cast member 80 and a second die-cast member 90 in Embodiment 6. 15(a) is a perspective view of the first die-cast member 80, FIG. 15(b) is a plan view of the first die-cast member 80, and FIG. 15(c) is a cross section taken along A14-A14 in FIG. 15(b). 15(d) is a perspective view of the second die-casting member 90, FIG. 15(e) is a plan view of the second die-casting member 90, and FIG. 15(f) is a perspective view of the second die-casting member 90. It is a sectional view taken along A15-A15.
FIG. 16 is a diagram shown to explain the metal bonded body forming step S26 in the sixth embodiment. FIG. 16(a) is a sectional view showing a state in which the first die-casting member 80 and the second die-casting member 90 are pressed relative to each other, and FIG. 16(b) is a sectional view showing a state where the first die-casting member 80 and the second die-casting member 90 are pressed against each other. 16(c) is a cross-sectional view showing a state in which the entire metal bonded body 150 is in contact with a surface 94 to be joined. FIG. 16(c) is a cross-sectional view showing a metal bonded body 150 formed by diffusion bonding.

The method for manufacturing a metal bonded body according to Embodiment 6 is basically the same method as the method for manufacturing a metal bonded body according to Embodiment 3, but the shapes of the first die-cast member and the second die-cast member are different from those in the embodiment. This is different from the method for manufacturing a metal bonded body according to No. 3. The method for manufacturing a metal bonded body according to the sixth embodiment includes a metal member preparation step S16 and a metal bonded body formation step S26. Furthermore, the die-cast member joining method according to the sixth embodiment corresponds to the metal joined body forming step S26. Each step will be explained below.

In the metal member preparation step S16 in the sixth embodiment, a first die-cast member 80 having a substantially hemispherical joining recess 82 is prepared (see FIGS. 15(a) to 15(c)). ), a second die-cast member 90 having a substantially hemispherical joining convex portion 92 is prepared (see FIGS. 15(d) to 15(f)).

In the joining recess 82 of the first die-cast member 80, the entire inner surface (semispherical portion) becomes the first joining surface 84. The vicinity of the apex of the joining recess 82 corresponds to the first planned joining surface 58 (bottom surface) in the third embodiment, and the vicinity of the edge corresponds to the first planned joining surface 54 (first inclined surface) in the third embodiment. I can think. Therefore, at least the vicinity of the apex of the hemisphere of the joining recess 82 has a predetermined surface roughness.

Also in the joining convex portion 92 of the second die-cast member 90, the entire outer surface (semispherical portion) becomes the second joining surface 94. The vicinity of the apex of the joining convex portion 92 corresponds to the first planned joining surface 58 (tip surface) in Embodiment 3, and the vicinity of the edge corresponds to the second planned joining surface 64 (second inclined surface) in Embodiment 3. You can think about it. Therefore, at least the vicinity of the apex of the hemisphere of the joining convex portion 92 also has a predetermined surface roughness. Note that the joining convex part 92 is slightly smaller than the joining recess 82 in order to satisfy the condition that "the first inclined surface and the second inclined surface abut against each other when inserted into the joining recess 82". The diameter is larger.

Note that the external dimensions of the first die-cast member 80 are the same as those of the first die-cast member 50 in the third embodiment, and in the metal joined body forming step S26, the first deformation suppression member 210 in the third embodiment is It is assumed that the member 210 can be used (see FIGS. 16(a) and 16(b)). Further, the external dimensions of the second die-cast member 90 excluding the joining convex portion 92 are also the same as those of the second die-cast member 60 in the third embodiment, and in the metal joined body forming step S26, the second modification in the third embodiment is used. It is assumed that a second deformation suppressing member 310 similar to the suppressing member 310 can be used.

The metal joined body forming step S26 in Embodiment 6 is basically the same as the metal joined body forming step S22 in Embodiment 3, except for the difference in shape of the first die cast member 80 and the second die cast member 90. That is, in the metal joined body forming step S26, the first die cast member 80 and the second die cast member 90 are relatively pressed with the joining convex portion 92 inserted into the joining recess 82 (FIG. 16(a) reference.). As a result, the vicinity of the apex of the first planned welding surface 84 and the vicinity of the apex of the second planned welding surface 94 collide (see FIG. 16(b)). Therefore, the entire surfaces of the first and second bonding surfaces 84 and 94 are diffusion bonded to form a metal bonded body 150 (see FIG. 16(c)).

The method for manufacturing a metal joined body according to the sixth embodiment is such that the first die-casting member 80 and the second die-casting member 80 are combined with the first deformation suppressing member 210 that suppresses deformation of the first die-casting member 80. The method for manufacturing a metal bonded body according to the third embodiment is performed because the metal bonded body 150 is formed by diffusion bonding the first die cast member 80 and the second die cast member 90 by relatively pressing the die cast member 90. Similarly, this method of manufacturing a metal bonded body is capable of suppressing pressure escape and deformation of the die-cast member (at least the first die-cast member 80) during bonding.

Note that the method for manufacturing a metal bonded body according to the sixth embodiment also has the corresponding effects among the effects that the method for manufacturing a metal bonded body according to the third embodiment has.

The method for joining die-cast members according to the sixth embodiment is to join the first die-cast member 80 and the second die-cast member in a state in which the first die-cast member 80 and the first deformation suppressing member 210 that suppresses deformation of the first die-cast member 80 are combined. Since the first die-cast member 80 and the second die-cast member 90 are diffusion-bonded by pressing the member 90 relative to each other, the pressure relief during joining is achieved similarly to the die-cast member joining method according to the third embodiment. The present invention provides a method for joining die-cast members that can suppress deformation of the die-cast members.

Although the present invention has been described above based on the above embodiments, the present invention is not limited to the above embodiments. It is possible to implement the present invention in various ways without departing from the spirit thereof, and for example, the following modifications are also possible.

(1) The shapes of the first die-casting member and the second die-casting member in each of the above embodiments are merely examples, and they may have any shape without departing from the scope of the present invention.

(2) In the fifth embodiment, the space forming recess 69b has a continuous groove shape, but the present invention is not limited to this. The space-forming recess can have any shape.

(3) In the fifth embodiment, the space-forming recess 69b is formed on the second joining surface 64, but the present invention is not limited thereto. The space forming recess may be formed on the first planned joining surface, or may be formed on both the first planned joining surface and the second planned joining surface.

(4) The features in Embodiments 4 to 6 above can be applied to other embodiments as long as there are no inhibiting factors.

(5) In each of the above embodiments, the metal bonded body forming step is performed by combining both the first die-cast member and the second die-cast member with the deformation suppressing member, but the present invention is not limited to this. It's not something you can do. The metal joined body forming step may be performed by combining only one of the first die-cast member and the second die-cast member with the deformation suppressing member.

(6) In the first embodiment, the metal bonded body forming step S20 heats the first die-cast member 10 and the second die-cast member 20 in order to promote diffusion bonding, and the first die-cast member 10 and the second die-cast member Although it is preferable to carry out the process while maintaining the temperature of 20 at a certain level (however, below the melting point), the present invention is not limited thereto. For example, it is thought that diffusion bonding tends to proceed in an environment such as outer space, so when carrying out the metal bonding body forming process of the present invention in such an environment, the first die-cast member and the second die-cast member are not necessarily separated. No need to heat. This also applies to the metal bonding body forming process of other embodiments.

(7) In each of the above embodiments, each first deformation suppressing member and each second deformation suppressing member are explained as being made of one component as a whole, but the present invention is not limited to this. do not have. The first deformation suppressing member and the second deformation suppressing member may be members made up of a plurality of parts (members that can be divided and combined).

10, 30, 50, 80...First die cast member, 12, 34, 54, 58, 84... First joining surface, 20, 40, 60, 60a, 60b, 90... Second die cast member, 22, 44, 64, 68, 94... Second joining surface, 32, 52, 82, 92... Recessed part for joining, 42, 62... Convex part for joining, 69a... Space, 69b... Recessed part for space formation, 100, 110, 120, 130, 140, 150... Metal joined body, 200, 210... First deformation suppressing member, 300, 310, 320... Second deformation suppressing member

Claims

A metal member preparation step of preparing a first die-cast member made of an aluminum-based material and having a first planned-to-be-joined surface, and a second die-cast member made of an aluminum-based material and has a second planned-to-be-joined surface;
The first die-casting member and a first deformation suppressing member that suppresses deformation of the first die-casting member are combined, and the first bonding surface and the second bonding surface are in contact with each other. By relatively pressing the first die-cast member and the second die-cast member so that pressure is applied to the surface to be joined and the second surface to be joined, the first die-cast member and the second die-cast member are bonded. A method for manufacturing a metal bonded body, comprising a metal bonded body forming step of forming a metal bonded body by diffusion bonding.
The first deformation suppressing member suppresses deformation of the first die-casting member at least in a direction perpendicular to a pressing direction in which the first die-casting member and the second die-casting member are pressed relative to each other. The method for manufacturing a metal bonded body according to claim 1, characterized in that:
The first deformation suppressing member has a shape that matches the shape of the first die-cast member at a temperature when diffusion bonding the first die-cast member and the second die-cast member,
In the metal joined body forming step, after the temperature of the first die-casting member and the first deformation suppressing member reaches a temperature at which the first die-casting member and the second die-casting member are diffusion-bonded, the first die-casting member is The method for manufacturing a metal joined body according to claim 1 or 2, characterized in that the member and the first deformation suppressing member are combined.
In the metal joined body forming step, the first die-cast member and the second die-cast member are combined with the second die-cast member and a second deformation suppressing member that suppresses deformation of the second die-cast member. 2. The method of manufacturing a metal bonded body according to claim 1, wherein the metal bonded body is relatively pressed.
The second deformation suppressing member suppresses deformation of the second die-casting member at least in a direction perpendicular to a pressing direction in which the first die-casting member and the second die-casting member are pressed relative to each other. 5. The method for manufacturing a metal bonded body according to claim 4.
The second deformation suppressing member has a shape that matches the shape of the second die-cast member at a temperature when the first die-cast member and the second die-cast member are diffusion bonded,
In the metal joined body forming step, after the temperature of the second die-casting member and the second deformation suppressing member reaches a temperature at which the first die-casting member and the second die-casting member are diffusion-bonded, the second die-casting member is The method for manufacturing a metal bonded body according to claim 4 or 5, characterized in that the member and the second deformation suppressing member are combined.
In the metal member preparation step, the first die-casting member and the second die-casting member are prepared, each of which has a predetermined surface roughness, the first joining surface and the second joining surface having a predetermined surface roughness,
In the metal bonding body forming step, by relatively pressing the first die-casting member and the second die-casting member, a change in surface microstructure is caused on the first joining surface and the second joining surface. 2. The method of manufacturing a metal bonded body according to claim 1, wherein the metal bonded body is formed by diffusion bonding the first die cast member and the second die cast member while causing generation of the metal bond.
In the metal member preparation step, a joining recess is formed as the first die-cast member, in which at least a portion of the inner surface is a first inclined surface angled with respect to the pressing direction in the metal joined body forming step. The second die-cast member has at least a part of its side surface having a second inclined surface with an angle corresponding to the first inclined surface, and when inserted into the joining recess. preparing a joining convex portion having a shape in which the first inclined surface and the second inclined surface abut against each other;
At least a portion of the first inclined surface is the first joining surface,
At least a portion of the second inclined surface is the second joining surface,
In the metal bonding body forming step, the first die-casting member and the second die-casting member are relatively pressed while the bonding convex portion is inserted into the bonding recess, thereby forming the first bonding schedule. Claim 1, wherein the first die-cast member and the second die-cast member are diffusion-bonded to form a metal bonded body while causing a change in surface microstructure on the surface and the second surface to be bonded. The method for manufacturing a metal bonded body according to .
In the metal joined body forming step, the first die cast member and the second die cast member are relatively pressed under temperature conditions that allow diffusion bonding of the first die cast member and the second die cast member. The method for manufacturing a metal bonded body according to claim 1.
Claim 1, wherein a space-forming recess that remains as a space even after the metal bonding body forming step is formed in at least one of the first and second bonding surfaces. The method for manufacturing a metal bonded body according to .
The method for manufacturing a metal bonded body according to claim 1, wherein the metal bonded body forming step is performed in the presence of air.
A first die-casting member made of an aluminum-based metal and having a first planned joining surface and a first deformation suppressing member that suppresses deformation of the first die-casting member are combined, The first die-casting member is arranged such that pressure is applied to the first and second bonding surfaces while the second bonding surface of the second die-casting member having two bonding surfaces is in contact with each other. A method for joining die-cast members, characterized in that by relatively pressing the first die-cast member and the second die-cast member, the first die-cast member and the second die-cast member are diffusion-bonded to form a metal joined body.