JP2021123017A - Dissimilar material joining structure and method for manufacturing the same - Google Patents

Abstract

To provide a dissimilar material joining structure capable of obtaining a stronger joining force and a method for manufacturing the same.SOLUTION: A beam structure 30 made of a similar material as a second member 20 is formed on a surface 21 of the second member 20 by a three-dimensional modeling technique. The beam structure 30 is provided with a column part 31 erected on the surface 21 of the second member 20, and a beam part 32 connected to the column part 31. Then, the surface 21 of the second member 20 and an internal space 33 of the beam structure 30 are filled with a first member 10 before solidification and then solidified. Thereby, a dissimilar material joining structure 1 is manufactured in which the first member 10 and the second member 20 material of which is different from that of the first member 10 are joined together.SELECTED DRAWING: Figure 1

Description

The present invention relates to a dissimilar material joint structure and a method for producing the same.

In transportation equipment such as automobiles, reduction of fuel consumption is indispensable, and as one of the means, multi-materialization is being promoted in which the materials of structural members are arranged in the right places. For this multi-materialization, a technology for joining dissimilar materials that firmly joins materials with different properties is indispensable.

There are various types of dissimilar material bonding between members made of a combination of materials for which chemical bonding force cannot be obtained. For example, in the case of joining in which a strong bonding force via electrons such as melt welding can be obtained, the combination of materials of the members to be joined is limited.
When joining such as welding is difficult, mechanical joining or joining with an adhesive is performed. However, in the mechanical connection, since the members are fastened to each other by using bolts or rivets, it is necessary to form holes in the members for fitting them, and the members become larger by that amount. Further, since the bonding with an adhesive is due to a weak bonding force such as an intermolecular force or a hydrogen bond, the bonding force is not so strong as compared with welding or the like. Further, the bonding force depends on the breaking strength of the solidified adhesive.

As one means for solving these problems, there is a joining structure aiming at an anchor effect, which is used for joining dissimilar materials in a combination of metal and resin (see, for example, Non-Patent Document 1). In this case, for example, by forming fine irregularities on the surface of the metal material and allowing the liquid resin to permeate the irregularities, the resin material is joined to the metal material in a form as if the roots of a tree were stretched. As a result, not only the intermolecular force but also the frictional force between the materials acts as a bonding force, so that strong dissimilar material bonding is achieved.

Masahiro Seto, 4 outsiders, "Effects of Reinforcing Fibers on Bonding Strength of Resin-Metal Bonding Injection Molded Products", Forming Process, Vol. 28, No. 10, 2016, p. 427-433

In the technique described in Non-Patent Document 1 described above, a dissimilar material joining structure that obtains an anchor effect is produced by allowing a resin to enter the unevenness formed on the surface of a metal member. Processing techniques such as laser, shot blasting, and etching are used to form such irregularities.

However, in the case of a dissimilar material joining structure in which a resin is embedded in the unevenness formed on the surface of a metal member, a chemical joining force cannot be expected, and the joining force is the frictional force between the members. However, such a dissimilar material joining structure is weak against a tensile force in a direction perpendicular to the surface of the metal member because holes (recesses) substantially perpendicular to the surface of the metal member are formed. In particular, when one of the members is made of a material having a low Young's modulus and is deformed by a relatively small force, the interface between the members may be peeled off by an external force and the joining force may be lost.

An object of the present invention is to provide a dissimilar material joining structure capable of obtaining a stronger joining force and a method for producing the same.

In order to solve the above problems, the present invention is a method for producing a dissimilar material joining structure in which a first member and a second member whose material is different from that of the first member are joined. The method for producing the dissimilar material joint structure includes a forming step, a filling step, and a solidifying step. In the forming step, a column portion erected on the surface and a beam portion connected to the column portion are provided on the surface of the second member, and a beam structure made of the same material as the second member is formed. It is formed by three-dimensional modeling technology. In the filling step, the surface of the second member and the internal space of the beam structure are filled with the first member before solidification. The solidification step solidifies the first member before solidification filled in the filling step.

Further, the present invention is a dissimilar material joining structure in which a first member and a second member whose material is different from that of the first member are joined. On the surface of the second member, a pillar portion erected on the surface and a beam portion connected to the pillar portion are provided, and a beam structure made of the same material as the second member is formed. Then, the first member comes into contact with the surface of the second member and enters the internal space of the beam structure.

According to the present invention, it is possible to provide a dissimilar material joining structure capable of obtaining a stronger joining force and a method for producing the same.

It is a perspective view which shows typically the dissimilar material joining structure which concerns on 1st Embodiment of this invention. It is a front view which shows typically the beam structure formed on the surface of the 2nd member shown in FIG. It is a flowchart which shows the content of the manufacturing method of the dissimilar material joint structure which concerns on 1st Embodiment of this invention. It is a figure which shows the schematic structure of the 3D modeling apparatus used in the forming process shown in FIG. It is a figure which shows the schematic structure of the mold used in the filling process shown in FIG. It is a front view which shows typically the beam structure which concerns on the deformation example formed on the surface of the 2nd member. It is a front view which shows typically the beam structure which concerns on the deformation example formed on the surface of the 2nd member. It is a front view which shows typically the beam structure which concerns on the deformation example formed on the surface of the 2nd member. It is a perspective view which shows typically the beam structure which concerns on the modification formed on the surface of the 2nd member. FIG. 5 is a perspective view schematically showing a comparative example in which only a plurality of square plate-shaped columns of the beam structure according to the modified example shown in FIG. 9 are formed on the surface of the second member. It is a flowchart which shows the content of the manufacturing method of the dissimilar material joint structure which concerns on 3rd Embodiment of this invention. It is a perspective view which shows typically the dissimilar material joining structure which concerns on 3rd Embodiment of this invention.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In each figure, common components and components of the same type are designated by the same reference numerals, and duplicate description thereof will be omitted as appropriate. In addition, the size and shape of the member may be deformed or exaggerated schematically for convenience of explanation.

(First Embodiment)
First, the first embodiment will be described with reference to FIGS. 1 to 5.
FIG. 1 is a perspective view schematically showing a dissimilar material joining structure 1 according to the first embodiment of the present invention. FIG. 2 is a front view schematically showing a beam structure 30 formed on the surface 21 of the second member 20 shown in FIG. For convenience of explanation, as shown in FIG. 1, the front-back, left-right, up-down directions are set. However, in the used state, the installation direction of the dissimilar material joining structure 1 may be different from the direction shown in FIG.

As shown in FIG. 1, the dissimilar material joining structure 1 is formed by joining a first member 10 and a second member 20 whose material is different from that of the first member 10. A beam structure 30 is formed on the surface 21 of the second member 20 by a three-dimensional modeling technique.

As shown in FIGS. 1 and 2, the beam structure 30 includes a pillar portion 31 erected on the surface 21 of the second member 20, and a beam portion 32 connected to the pillar portion 31. .. The column portion 31 is formed substantially perpendicular to the surface 21 of the second member 20, and the beam portion 32 extends in a direction different from the extending direction of the column portion 31. Here, the beam portion 32 is formed in a direction orthogonal to the extending direction of the column portion 31, that is, substantially horizontally with respect to the surface 21 of the second member 20. Further, the cross-sectional shapes of the pillar portion 31 and the beam portion 32 orthogonal to the longitudinal direction are quadrangular, but are not limited to this, and may be circular or elliptical, for example. The material of the beam structure 30 is the same as or the same as that of the second member 20.

Here, the beam structure 30 includes a structure having a plurality of column portions 31 and a beam portion 32 joined to the tops of the plurality of column portions 31. Specifically, a structure having four pillars 31 arranged side by side in the horizontal direction (horizontal direction in FIG. 2) and one beam 32 joined to the tops of the four pillars 31. The bodies are arranged side by side in three rows in the vertical direction (direction perpendicular to the paper surface of FIG. 2). A plurality of internal spaces 33 are formed between the beam portion 32 and the surface 21 of the second member 20. Specifically, the space surrounded by the pillar portion 31, the beam portion 32, and the surface 21 of the second member 20 forms the internal space 33. The plurality of internal spaces 33 communicate with each other.

In the first embodiment, the material of the first member 10 is the first resin. The material of the second member 20 is metal. However, the material of the second member 20 may be ceramic or a second resin of a type different from that of the first resin.

Next, a method of manufacturing the dissimilar material joint structure 1 will be described with reference to FIGS. 3 to 5.
FIG. 3 is a flowchart showing the contents of a method for manufacturing a dissimilar material joining structure 1 (see FIG. 1, the same applies hereinafter) according to the first embodiment of the present invention. FIG. 4 is a diagram showing a schematic configuration of a three-dimensional modeling apparatus 100 used in the forming step (step S10) shown in FIG. FIG. 5 is a diagram showing a schematic configuration of a mold 200 as a molding mold used in the filling step (step S20) shown in FIG.

As shown in FIG. 3, the method for producing the dissimilar material joining structure 1 includes a forming step (step S10), a filling step (step S20), and a solidification step (step S30).

In the forming step (step S10), the beam structure 30 (see FIG. 1, the same applies hereinafter) is formed on the surface 21 (see FIG. 1, the same applies hereinafter) of the second member 20 by a three-dimensional modeling technique. In the filling step (step S20), the surface 21 of the second member 20 and the internal space 33 of the beam structure 30 (see FIG. 1, the same applies hereinafter) the first member 10 before solidification (see FIG. 1, the same applies hereinafter). ) Is filled. The solidification step (step S30) solidifies the first member 10 before solidification packed in the filling step (step S20).

Next, steps S10, S20, and S30 will be described more specifically.
The forming step (step S10) is carried out using, for example, the three-dimensional modeling apparatus 100 as shown in FIG.

In the present embodiment, the three-dimensional modeling apparatus 100 creates a three-dimensional model by irradiating a layer of metal powder 190 made of the same material as the second member 20 with a laser beam 125 as an energy beam. It is a modeling device. The three-dimensional modeling device 100 includes a powder supply device 110, a laser light irradiation device 120 as an energy beam irradiation device, a moving device 130, and a control device 160. The powder supply device 110 and the moving device 130 are housed in the chamber 170.

The powder supply device 110 drops and supplies the powder 190 toward the surface 21 of the second member 20 which is a structural component (including a finished product) as a modeling object. The powder supply device 110 can be configured by utilizing a high-precision powder supply machine. As the metal powder 190, for example, aluminum alloys, steels, stainless steels, pure titaniums, titanium alloys, nickel-based alloys and the like can be used.

The laser light irradiation device 120 irradiates the layer of the powder 190 supplied and deposited by the powder supply device 110 with the laser light 125. The laser light irradiation device 120 includes a laser light source 121 that emits laser light 125, mirrors (galvano mirrors) 122 and 123, and a lens system 124. By changing the angles of the mirrors 122 and 123, an operation of changing the irradiation direction of the laser beam 125 is performed.

The moving device 130 is a device for moving the second member 20. In the present embodiment, the moving device 130 includes a base 131 for setting the second member 20, and a driving mechanism 132 for moving the base 131. The drive mechanism 132 can move the base 131 in each of the front-back, left-right, up-down directions. The chamber 170 is a container made of a metal such as stainless steel. An inert gas such as argon or nitrogen is supplied into the chamber 170 from which oxygen has been removed by evacuation.

The control device 160 includes a CPU (Central Processing Unit) (not shown) and a storage unit such as a memory and a hard disk. The storage unit stores the three-dimensional shape data of the structure to be three-dimensionally modeled and the processing condition data. The control device 160 controls the laser light source 121, the mirrors 122, 123, and the lens system 124 based on the processing condition data to adjust the output characteristics, scanning speed, scanning interval, and irradiation position of the laser beam 125. Further, the control device 160 controls the mobile device 130. A display device 181 and an input device 182 are connected to the control device 160. The display device 181 displays various information such as an operation screen and a warning message. The input device 182 accepts a user's operation for creating or inputting three-dimensional shape data and processing condition data, and inputs various information such as a start instruction for three-dimensional modeling work.

In the forming step (step S10), first, the second member 20 is set and fixed on the base 131 of the moving device 130. Then, after the inside of the chamber 170 is evacuated, the inert gas is supplied into the chamber 170. Next, the powder supply device 110 drops an appropriate amount of the powder 190 toward the surface 21 of the second member 20 and supplies the powder 190. Here, the control device 160 controls the moving device 130 to move the second member 20 in the horizontal direction, and controls the powder supply device 110 to produce powder toward the surface 21 of the second member 20. Drop 190 by a certain amount. This forms a layer of thin powder 190 deposited on the surface 21 of the second member 20. Subsequently, the control device 160 controls the moving device 130 to move the second member 20 below the laser light irradiating device 120, and then controls the laser light irradiating device 120 to form a layer of the powder 190. The laser beam 125 is irradiated. As a result, a molding region in which the powder 190 is melted and bonded to be solidified is formed. Then, the control device 160 controls to carry out three-dimensional modeling for the next layer. By irradiating the predetermined region of the powder 190 layer with the laser beam 125 in this way, the three-dimensional modeling in which the layers of the solidified modeling region are laminated one by one is performed up to the last layer (top layer). As a result, the beam structure 30 is formed on the surface 21 of the second member 20.

The filling step (step S20) is carried out using, for example, a mold 200 as shown in FIG. The mold 200 includes an upper mold 210 and a lower mold 220 that are relatively close to each other. The upper mold 210 is formed with a passage 211 into which the first resin, which is the material of the first member 10, flows in. As the first resin, for example, an epoxy resin can be used. The lower mold 220 is formed with, for example, a concave positioning portion 221 that positions the second member 20 in the mold 200. Further, in a state where the upper mold 210 and the lower mold 220 are combined (the state shown in FIG. 5), a filling space 230 is formed between the upper mold 210 and the lower mold 220.

In the filling step (step S20), first, the second member 20 having the beam structure 30 formed on the surface 21 in a state where the upper mold 210 and the lower mold 220 are opened and separated from each other is the positioning portion of the lower mold 220. It is set to 221 and positioned. Next, the upper die 210 and the lower die 220 are moved close to each other and matched. Subsequently, the liquid first resin flows into the filling space 230 formed between the upper mold 210 and the lower mold 220 through the passage 211 in the direction indicated by the arrow 231. Then, the surface 21 of the second member 20 and the internal space 33 of the beam structure 30 are filled with the liquid first resin before solidification. Further, the liquid first resin is filled in the entire filling space 230 including the periphery of the beam structure 30.

In the solidification step (step S30), the liquid first resin before solidification filled in the filling step (step S20) is solidified. When the liquid first resin solidifies, the upper mold 210 and the lower mold 220 open and separate from each other, and the first member 10 and the second member 20 are joined via the beam structure 30 to form a dissimilar material joint structure. 1 is taken out as a molded product.

As described above, in the present embodiment, the beam structure 30 made of the same material as the second member 20 is formed on the surface 21 of the second member 20 by the three-dimensional modeling technique. The beam structure 30 includes a pillar portion 31 erected on the surface 21 of the second member 20, and a beam portion 32 connected to the pillar portion 31. Then, the surface 21 of the second member 20 and the internal space 33 of the beam structure 30 are filled with the first member 10 before solidification and then solidified. As a result, a dissimilar material joining structure 1 is produced in which the first member 10 and the second member 20 whose material is different from that of the first member 10 are joined. In the dissimilar material joining structure 1, the first member 10 comes into contact with the surface 21 of the second member 20 and enters the internal space 33 of the beam structure 30.

In the conventional dissimilar material joining structure in which the anchor effect is obtained by allowing the resin to enter the unevenness formed on the surface of the metal member, the joining force due to the frictional force can be improved. However, in the conventional dissimilar material joining structure utilizing the anchor effect due to such unevenness, a hole (recess) substantially perpendicular to the surface of the member to be joined is formed. Therefore, the conventional dissimilar material joining structure is strong against the shearing force in the direction parallel to the surface of the member to be joined, but weak against the tensile force in the vertical direction.

On the other hand, in the present embodiment, not only the holes perpendicular to the surface of the member but also the beam structure 30 in which the column portion 31 and the beam portion 32 such as the rigid frame structure are stretched is formed by the three-dimensional modeling technique. It is formed on the surface 21 of the member 20 of 2. After that, the surface 21 of the second member 20 and the internal space 33 of the beam structure 30 are filled with a liquid resin, permeated, and solidified, so that the filled resin and the material of the member to be joined are brought into close contact with each other. They are joined in such a way that they hold each other. The bonding force (bonding strength) of the dissimilar material bonding structure 1 produced in this manner depends on the strength of the material itself of the dissimilar material bonding structure 1 rather than the intermolecular force and the frictional force between the members. As a result, stronger dissimilar material bonding between the resin and, for example, metal is achieved.
Therefore, according to the present embodiment, it is possible to provide a dissimilar material joining structure 1 capable of obtaining a stronger joining force and a method for producing the same.
Further, since the shape of the beam structure 30 can be freely changed by the three-dimensional modeling technique, the joining force of the dissimilar material joining structure 1 can be adjusted according to the application.

The beam structure 30 is not limited to the shapes shown in FIGS. 1 and 2, and may be formed in any shape including a column portion and a beam portion.
6 to 8 are front views schematically showing beam structures 30a to 30c according to a modified example formed on the surface 21 of the second member 20.

The beam structure 30a shown in FIG. 6 is a gate-shaped structure having a pair of column portions 31a erected on the surface 21 of the second member 20 and a beam portion 32a joined to the tops of the pair of column portions 31a. It has multiple. An internal space 33a is formed between the beam portion 32a and the surface 21 of the second member 20. Specifically, the space surrounded by the pillar portion 31a, the beam portion 32a, and the surface 21 of the second member 20 forms the internal space 33a.

The beam structure 30b shown in FIG. 7 consists of a pair of curved column portions 31b erected on the surface 21 of the second member 20 and a curved beam portion 32b joined to the tops of the pair of curved column portions 31b. It is provided with a plurality of semicircular ring-shaped structures having the same structure. That is, the beam structure 30b is formed by forming the joint portion between the column portion 31a and the beam portion 32a in the beam structure 30a shown in FIG. 6 in an R shape. As described above, in the beam structure, the column portion and the beam portion may be bent. An internal space 33b is formed between the beam portion 32b and the surface 21 of the second member 20. Specifically, the space surrounded by the pillar portion 31b, the beam portion 32b, and the surface 21 of the second member 20 forms the internal space 33b.

The beam structure 30c shown in FIG. 8 has an inverted L-shaped structure having one column portion 31c erected on the surface 21 of the second member 20 and a beam portion 32c joined to the top of the column portion 31c. It has multiple bodies. In this case, the beam portion 32c is a so-called cantilever. An internal space 33c is formed between the beam portion 32c and the surface 21 of the second member 20. Specifically, the space surrounded by the pillar portion 31c, the beam portion 32c, and the surface 21 of the second member 20 forms the internal space 33c.

FIG. 9 is a perspective view schematically showing a beam structure 30d according to a modified example formed on the surface 21 of the second member 20.
The beam structure 30d shown in FIG. 9 includes a plurality of square plate-shaped column portions 31d erected on the surface 21 of the second member 20 and a lattice-shaped beam portion 32d joined to the tops of the plurality of column portions 31d. It has. The beam portion 32d is formed here so that a plurality of short cylindrical portions are arranged on a plane so as to be in contact with each other. An internal space 33d is formed between the beam portion 32d and the surface 21 of the second member 20. Specifically, the space surrounded by the pillar portion 31d, the beam portion 32d, and the surface 21 of the second member 20 forms the internal space 33d.

Even when the beam structures 30a to 30d according to the modified examples as shown in FIGS. 6 to 9 are formed on the surface 21 of the second member 20, the same operation and effect as those of the embodiments shown in FIGS. 1 to 5 Can be obtained. That is, when the first member 10 comes into contact with the surface 21 of the second member 20 and enters the internal spaces 33a to 33d of the beam structures 30a to 30d, a stronger joining force can be obtained.
The shapes of the beam structures 30, 30a to 30d described above are merely examples and are not limited to these, and may form, for example, a porous structure.

(Experimental example)
FIG. 10 is a perspective view schematically showing a comparative example in which only a plurality of square plate-shaped column portions 31d of the beam structure 30d according to the modified example shown in FIG. 9 are formed on the surface 21 of the second member 20. be.
The bonding force (bonding strength) is compared between the case where the beam structure 30d shown in FIG. 9 is formed on the surface 21 of the second member 20 and the case where only the plurality of square plate-shaped column portions 31d shown in FIG. 10 are formed. I conducted an experiment to do.
The material of the second member 20 was titanium. The dimensions of the surface 21 of the second member 20 are the longitudinal dimension A = 10 mm and the lateral dimension B = 5 mm. The material of the first member 10 (see FIG. 1) was an epoxy resin, which was solidified using a curing agent.
A dissimilar material joining structure 1 in which the first member 10 and the second member 20 were joined was produced, and a tensile test was performed by applying a load (force) in a direction in which the first member 10 and the second member 20 were joined.
As a result of the tensile test, the breaking load when only the plurality of square plate-shaped column portions 31d shown in FIG. 10 were formed was 10.1 kN, and the breaking load when the beam structure 30d shown in FIG. 9 was formed was 14. It was 2 kN. That is, when the beam structure 30d was formed, the joining force was about 1.4 times that when only the plurality of square plate-shaped column portions 31d were formed, and a stronger joining force could be obtained.

(Second Embodiment)
Next, the second embodiment will be mainly described in that it differs from the first embodiment described above, and common components and components of the same type are designated by the same reference numerals and description thereof will be omitted as appropriate.
In the second embodiment, the material of the first member 10 is a fiber reinforced plastic (FRP) in which reinforcing fibers are compounded with the first resin. The material of the second member 20 is metal. However, the material of the second member 20 may be ceramic or a second resin of a type different from that of the first resin.

In the filling step (step S20), the second member 20 is set in the mold 200, and the surface 21 of the second member 20 and the internal space 33 of the beam structure 30 together with the liquid first resin before solidification. Reinforcing fibers are filled. As the reinforcing fiber, for example, carbon fiber, glass fiber, cellulose nanofiber or the like can be used.

For example, a fiber-reinforced resin containing a reinforcing fiber having a length of about several mm, which is called a chopped fiber, is formed into a shape mainly by injection molding using a mold 200. At this time, the reinforcing fibers flow into the mold 200 together with the liquid first resin. A second member 20 such as a metal nut, which is called an insert component, is preliminarily fitted and set in the mold 200. As a result, the molded first resin member 10 and the second member 20 such as a nut can be integrated (insert molding). Here, even if a hole (unevenness) aimed at an anchor effect is formed for the purpose of firmly joining the insert parts, it is difficult for fibers to enter the hole because it is a dead end hole. Therefore, by forming the beam structure 30 including the column portion 31 and the beam portion 32 instead of such a dead-end hole, an internal space 33 communicating with each other is formed in which reinforcing fibers can easily enter. The internal space 33 of the beam structure 30 is preferably formed so as to be arranged in accordance with the flow of the first resin. Such a beam structure 30 is formed on the surface 21 of a second member 20 such as an insert part by a three-dimensional modeling technique. As a result, the reinforcing fibers are uniformly permeated into the internal space 33 of the beam structure 30, and a stronger dissimilar material bonding between the fiber reinforced resin and, for example, a metal is achieved.

(Third Embodiment)
Next, the third embodiment will be mainly described in terms of differences from the first embodiment described above, and common components and components of the same type will be designated by the same reference numerals and description thereof will be omitted as appropriate.
FIG. 11 is a flowchart showing the contents of a method for manufacturing a dissimilar material joining structure 1a (see FIG. 12, the same applies hereinafter) according to the third embodiment of the present invention. FIG. 12 is a perspective view schematically showing the dissimilar material joining structure 1a according to the third embodiment of the present invention.

In the third embodiment, the material of the first member 10 is a carbon fiber reinforced resin (CFRP) in which carbon fibers are compounded with the first resin. The material of the second member 20 is metal. However, the material of the second member 20 may be ceramic or a second resin of a type different from that of the first resin.

As shown in FIG. 11, the second embodiment includes a weaving step (step S12) between the forming step (step S10) and the filling step (step S20).

In the weaving step (step S12), the carbon fibers 12 are woven into the internal space 33 of the beam structure 30 formed in the forming step (step S10).

In the filling step (step S20), the second member 20 is set in the mold 200, and the liquid first resin before solidification is formed on the surface 21 of the second member 20 and the internal space 33 of the beam structure 30. It is filled. In the filling step (step S20), the weaving step (step S12) may be performed after the second member 20 is set in the mold 200.

The carbon fiber 12 woven in the weaving step (step S12) may be one in which a part of the carbon fiber in the carbon fiber reinforced resin in the prepreg state is taken out. The prepreg is made of a woven fabric made of carbon fiber or the like, impregnated with a resin, or crimped with a resin film to form a sheet, for example. When the carbon fiber reinforced resin in the prepreg state is used as the woven carbon fiber 12, a part of the carbon fiber 12 in the carbon fiber reinforced resin in the prepreg state is taken out. For example, the carbon fiber 12 at the peripheral portion of the sheet-shaped carbon fiber reinforced resin in the prepreg state is taken out. However, the carbon fiber 12 in the central portion of the sheet-shaped carbon fiber reinforced resin in the prepreg state may be taken out. The taken-out carbon fiber 12 is woven into the internal space 33 of the beam structure 30 manufactured by the three-dimensional modeling technique and is in communication with each other, and in that state, the first resin is filled and impregnated to prepare the dissimilar material bonding structure 1a. Will be done. The first resin to be filled may be the same as the resin impregnated in the prepreg. As a result, stronger dissimilar material bonding between the carbon fiber reinforced resin and, for example, a metal is achieved.

(Fourth Embodiment)
Next, the fourth embodiment will be mainly described in terms of differences from the first embodiment described above, and common components and components of the same type will be designated by the same reference numerals and description thereof will be omitted as appropriate.
In the fourth embodiment, the material of the first member 10 is a metal or ceramic sintered part. The material of the second member 20 is a metal or ceramic different from the material of the first member 10.

In the filling step (step S20) of FIG. 3, the second member 20 is set in the mold as a molding die, and before sintering, the surface 21 of the second member 20 and the internal space 33 of the beam structure 30 are formed. Metal powder or ceramic powder is filled. Further, in the solidification step (step S30), the metal powder or ceramic powder filled in the filling step (step S20) is sintered by heat treatment. As a result, stronger dissimilar material bonding between the sintered part and the structural part made of metal, for example, is achieved.

(Fifth Embodiment)
Next, the fifth embodiment will be mainly described in terms of differences from the first embodiment described above, and common components and components of the same type will be designated by the same reference numerals and description thereof will be omitted as appropriate.
In the fifth embodiment, the material of the first member 10 is a metal casting part. The material of the second member 20 is a metal or ceramic different from the material of the first member 10.

In the filling step (step S20) of FIG. 3, the second member 20 is set in the mold as a molding die, and the molten metal is formed in the surface 21 of the second member 20 and the internal space 33 of the beam structure 30. Is poured and filled. As a result, a stronger dissimilar material joining between the cast part and the structural part made of metal, for example, is achieved.

Although the present invention has been described above based on the embodiment, the present invention is not limited to the configuration described in the embodiment. The present invention can appropriately change the configuration within a range that does not deviate from the gist thereof, including appropriately combining or selecting the configurations described in the above-described embodiment. In addition, a part of the configuration of the embodiment can be added, deleted, or replaced.

For example, in the above-described embodiment, the surface 21 of the second member 20 on which the beam structures 30, 30a to 30d are formed has a flat surface, but for example, a curved surface such as an arc surface of a curved plate, a side surface of a cylinder, etc. It may exhibit the surface (spherical surface) of a sphere or the like.

Further, in the above-described embodiment, when the beam structure 30 is formed on the surface 21 of the second member 20 by the three-dimensional modeling technique, metal powder or the like is directed from the powder supply device 110 toward the surface 21 of the second member 20. Is dropped and supplied. However, the method of supplying the metal powder or the like toward the surface 21 of the second member 20 is not limited to the above-mentioned method. As a three-dimensional modeling technique, for example, a powder bed fusion bonding method (PBF method) is used in which metal powder or the like is supplied so as to be spread horizontally using a roller or a blade, and then the powder is melted and bonded by scanning a laser beam. May be done. Further, in the above-described embodiment, the energy beam that irradiates the layer of the metal powder 190, for example, is the laser beam 125, but the energy beam is not limited to this, and may be, for example, an electron beam.

1,1a Dissimilar material joint structure 10 First member 12 Carbon fiber 20 Second member 21 Surface 30, 30a to 30d Beam structure 31, 31a to 31d Pillar part 32, 32a to 32d Beam part 33, 33a to 33d Internal space 100 3D modeling equipment 200 mold (molding mold)

Claims (11)

A method for producing a dissimilar material joining structure in which a first member and a second member whose material is different from that of the first member are joined.
On the surface of the second member, a pillar portion erected on the surface and a beam portion connected to the pillar portion are provided, and a beam structure made of the same material as the second member is formed by three-dimensional modeling technology. The forming process to form and
A filling step of filling the surface of the second member and the internal space of the beam structure with the first member before solidification.
A solidification step of solidifying the first member before solidification filled in the filling step,
A method for producing a dissimilar material joint structure, which comprises. The material of the first member is the first resin.
The material of the second member is metal, ceramic, or a second resin of a type different from that of the first resin.
In the filling step, the second member is set in a molding mold, and the surface of the second member and the internal space of the beam structure are filled with the liquid first resin before solidification. The method for producing a dissimilar material joint structure according to claim 1, wherein the structure is formed. The material of the first member is a fiber-reinforced resin in which reinforcing fibers are compounded with the first resin.
The material of the second member is metal, ceramic, or a second resin of a type different from that of the first resin.
In the filling step, the second member is set in a molding mold, and reinforcing fibers are formed on the surface of the second member and the internal space of the beam structure together with the liquid first resin before solidification. The method for producing a dissimilar material joint structure according to claim 1, wherein the material is to be filled. The material of the first member is a carbon fiber reinforced resin in which carbon fibers are compounded with the first resin.
The material of the second member is metal, ceramic, or a second resin of a type different from that of the first resin.
Including a weaving step of weaving carbon fibers into the internal space of the beam structure formed in the forming step.
In the filling step, the second member is set in a molding mold, and the surface of the second member and the internal space of the beam structure are filled with the liquid first resin before solidification. The method for producing a dissimilar material joint structure according to claim 1, wherein the structure is formed. The first member is a metal or ceramic sintered part.
The material of the second member is a different kind of metal or ceramic from the material of the first member.
In the filling step, the second member is set in a molding mold, and the surface of the second member and the internal space of the beam structure are filled with metal powder or ceramic powder before sintering. ,
The method for producing a dissimilar material bonding structure according to claim 1, wherein the solidification step is for sintering the metal powder or ceramic powder filled in the filling step by heat treatment. The first member is a metal casting part.
The material of the second member is a different kind of metal or ceramic from the material of the first member.
The filling step is characterized in that the second member is set in a molding mold, and molten metal is poured into the surface of the second member and the internal space of the beam structure to fill the mold. The method for producing a dissimilar material joint structure according to claim 1. It is a dissimilar material joining structure in which a first member and a second member whose material is different from that of the first member are joined.
On the surface of the second member, a pillar portion erected on the surface and a beam portion connected to the pillar portion are provided, and a beam structure made of the same material as the second member is formed.
A dissimilar material joint structure, characterized in that the first member comes into contact with the surface of the second member and enters the internal space of the beam structure. The material of the first member is the first resin.
The dissimilar material bonding structure according to claim 7, wherein the material of the second member is a metal, ceramic, or a second resin of a type different from that of the first resin. The material of the first member is a fiber-reinforced resin in which reinforcing fibers are compounded with the first resin.
The material of the second member is metal, ceramic, or a second resin of a type different from that of the first resin.
The dissimilar material joining structure according to claim 7, wherein the reinforcing fibers are contained in the internal space of the beam structure. The first member is a metal or ceramic sintered part.
The dissimilar material joining structure according to claim 7, wherein the material of the second member is a metal or ceramic of a type different from the material of the first member. The first member is a metal casting part.
The dissimilar material joining structure according to claim 7, wherein the material of the second member is a metal or ceramic of a type different from the material of the first member.

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