JP2754193B2 - Lamination bonding molding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a complex-shaped body, and more particularly to a difficult-to-work material such as ceramics and intermetallic compounds, or a long-fiber reinforced composite material, which is difficult to perform plastic working or cutting. Or laminated composite materials,
The present invention relates to a method for forming a complex shaped body made of a material which can be relatively easily formed with a simple shaped body such as a thin plate, but is very difficult to form a massive complicated shaped body.

[0002]

2. Description of the Related Art Conventionally, long fibers reinforced composite materials such as ceramics and metals reinforced with long fibers such as ceramics, intermetallic compounds and carbon fibers, and metals reinforced with woven fabrics of long fibers such as carbon fibers. Since the laminated and formed composite material has excellent properties such as heat resistance and high strength, it is widely expected to be widely used for industrial products and the like.

For example, when the above-mentioned materials are used as structural members of various devices and facilities by making use of their characteristics, it is necessary to form a member having a complicated shape from these materials. Each of the methods of forming a complex shape body made of such a material has a problem.

[0004] That is, since ceramics and intermetallic compounds are usually difficult-to-work materials that are difficult to perform plastic working and cutting work, complex shapes made of such materials are:
It is mainly formed from a simple shape of these materials by grinding with a diamond tool, etc.In such a processing method, it is necessary to form a complicated shape with fine irregularities by grinding. In addition, a specially shaped tool corresponding to the shape to be formed is required, and a long processing time is required. As a result, the processing cost for forming is increased. For such difficult-to-process materials, a method of molding in a powder state, followed by sintering to form a desired molded product is often adopted. In that case, an injection mold used for powder molding is required, and a long processing time is required, resulting in high processing cost.

On the other hand, in the case of a long fiber reinforced composite material or a laminated composite material, it is relatively easy to form a simple shape such as a thin plate, but it is difficult to form a complex shape. Therefore, the molding of a complex shaped body made of such a material generally involves first forming a block of a simple shape such as a cylinder or a rectangular parallelepiped, and then cutting out the target complex shaped body from the formed block by grinding or the like. By
Is being done. Further, as another method of forming a complex-shaped body made of such a composite material, after forming a component such as a long fiber of the composite material or a woven fabric made of the long fiber into a shape of a formed body, sintering or the like is performed. A method of performing a process and obtaining a complex-shaped body with almost no removal processing is also practiced. However, any of these methods requires a grinding tool, a molding die, and the like, and also involves a problem that a long processing time is required for the grinding and the like, and the processing cost is increased.

[0006] By the way, a thin plate made of a material such as a metal is processed by a laser beam or the like into a thin plate having a shape corresponding to each of a plurality of sections for providing a target formed body. A technique of forming a member having a complicated three-dimensional shape by laminating materials in a predetermined order and joining adjacent thin sheet forming materials to each other, that is, a lamination joining molding method, has been developed and tested experimentally. ing. In such a laminate joining molding method, as described above, a difficult-to-work material that is difficult to perform plastic working or cutting, or a simple shape such as a thin plate can be relatively easily formed, but a massive complex shape is formed. There is a possibility that a complex body made of a material or the like which is difficult to mold can be quickly molded and manufactured at low processing cost.

However, on the other hand, in such a lamination joining molding method, since it is difficult to accurately position the thin sheet forming materials at the time of laminating the thin sheet forming materials, a great deal of time is required for positioning the thin sheet forming materials. In addition to being time-consuming, there is a tendency that relative displacement between the laminated thin plate forming materials is likely to occur, and it is difficult to obtain a molded product having an accurate predetermined shape. I have. In addition to it,
Such a lamination bonding molding method also has a problem that it is difficult to form a molded body having properties such as sufficient strength because it is difficult to firmly bond adjacent thin plate molding materials. It is. That is, in the case of the laminated joining molding method, when a joining method such as welding, brazing, adhesion, or screwing, which is usually used for joining between thin plates, is used for joining between thin sheet forming materials, In the method of joining, because it is difficult to use a joining material of a different material from the thin sheet forming material, or to join the entire surface of the laminated surface of adjacent thin sheet forming materials,
As described above, the molding method of shaving a lump material or the molding method of molding a powder material and thereafter sintering does not provide properties such as sufficient strength as compared with the obtained molded body.

Therefore, in order to solve the problem of joining between adjacent thin plate forming materials in such a laminate joining forming method, the members to be joined are pressurized at a high temperature and the material is creep-deformed by diffusion. Attempts have also been made to join adjacent thin sheet materials by a method of joining those members by causing mass transfer by diffusion in the vicinity of the joining surface, that is, by a diffusion joining method.

[0009] However, even in such a laminate bonding molding method using diffusion bonding, when the cross-sectional area of the target molded body is largely changed, etc.
Excessive stress is generated in the sheet metal forming the portion with a small cross-sectional area, and the obtained molded body may locally have large deformation. There is a problem that it cannot be done.

[0010] Thus, difficult-to-work materials containing ceramics and intermetallic compounds which are difficult to perform plastic working and cutting,
Simple shapes such as thin plates, such as long fiber reinforced composite materials and laminated composite materials, can be formed relatively easily, but it is very difficult to form massive complex shapes. Although there is a high need for a method for rapidly forming a homogeneous complex shape having the characteristics described above at low cost, it has not been established at present, and the development of a new method for forming a complex shape is expected. It is rare.

[0011]

SUMMARY OF THE INVENTION Here, the present invention has been made in view of such circumstances, and it is an object of the present invention to provide a ceramic or metal material which is difficult to perform plastic working or cutting. Simple shapes such as thin plates such as difficult-to-process materials such as compounds, long fiber reinforced composite materials and laminated composite materials can be formed relatively easily, but the formation of massive complex shapes is extremely difficult. Provided is a laminate joining molding method capable of rapidly molding a homogeneous arbitrary complex shaped body made of a difficult material at a low processing cost while having an accurate predetermined shape and properties such as sufficient strength. It is in.

[0012]

In order to solve the above-mentioned problems, the present invention provides a plurality of thin plate members each having a forming hole having a shape corresponding to each of a plurality of sections for providing a target formed body. On the other hand, a plurality of thin plate forming materials having a shape corresponding to each of the forming holes of the plurality of thin plate members are prepared, and then the thin plate member and the thin plate forming materials corresponding to the forming holes are combined to form a thin plate in the forming hole. Under the condition that the molding material is fitted, the plurality of thin plate moldings and the plurality of thin molding materials are sequentially stacked, and then uniaxially pressed in the laminating direction, whereby the plurality of laminated thin molding materials are mutually interlocked. Laminated joint molding method, characterized in that diffusion bonding is performed integrally with the obtained bonded body, and a plurality of thin plate members are removed from around the obtained bonded body to obtain a desired molded body.
This is the gist.

[0013] According to the laminated joining method according to the present invention, a thin plate member having a forming hole corresponding to each of a plurality of sections to give a target formed body is formed. Under the state in which a plurality of thin sheet moldings having a shape are fitted, the plurality of thin sheet moldings and the plurality of thin sheet moldings are sequentially laminated, so that the positioning of the thin sheet moldings is performed by the forming holes of the thin sheet moldings. It can be done easily and accurately.

According to the method of the present invention, a plurality of thin plate members are combined with a thin plate member corresponding to the forming hole, and the plurality of thin plate members are fitted into the forming hole. Since the shape obtained by sequentially stacking a thin plate material and a plurality of thin plate forming materials can be formed as a simple shape having a small change in cross-sectional area as compared with the target formed body, the thin plate is pressed by the uniaxial pressing means. As a result, the surface pressure exerted on each cross-section made of the mold material and the thin plate material becomes substantially equal,
The joining surface pressure between the adjacent thin sheet forming materials becomes substantially uniform in the laminating direction, and large deformation is prevented from occurring in the thin sheet forming material having a small area of the stacking surface. At the same time, since the thin sheet material is securely supported by the thin sheet material into which it is fitted and, in some cases, the thin sheet material above and below it, the laminated shape of a plurality of stacked thin sheet materials, and furthermore, the purpose Regardless of the shape of the molded body to be formed, it is effective that bending force and torsional moment are generated in a plurality of superimposed thin sheet materials by the pressing force from the uniaxial pressing means, regardless of the shape of the molded body. Accordingly, even when the pressing force of the uniaxial pressing means is large, it is possible to prevent the plurality of laminated thin plate forming materials, and eventually the formed body, from being locally deformed largely due to buckling or the like. And those results,
It is possible to apply a higher joining surface pressure to the plurality of stacked thin plate forming materials without significantly deforming the stacked thin plate forming materials, and it is possible to improve the properties such as the strength of the formed body.

Further, in the method of the present invention, since the molded articles are joined and formed by diffusion joining between the adjacent thin sheet moldings, a joining method such as brazing, adhesion or screwing is used. Unlike the molding by, the obtained molded body is
In addition to being homogeneous, the joint surface can also have characteristics such as strength of the material.

Further, in the method of the present invention, since uniaxial pressing is employed as the pressing method, the contact surface between the inner surface of the forming hole of the thin plate member and the outer peripheral surface of the thin plate member is formed. The pressure is kept low, and after molding of the molded body, it becomes easy to remove the thin plate material from around the molded body,
Processing time is reduced.

Therefore, according to the method of the present invention,
Despite its excellent properties, such as ceramics, intermetallic compounds, long fiber reinforced composite materials, and laminated composite materials, it has been difficult to mold members with complex shapes, which has prevented its use. It is possible to rapidly form a homogeneous and complex shaped object consisting of the following, having an accurate predetermined shape and properties such as sufficient strength, at a low processing cost.

Further, in the laminated joining method according to the present invention, a joining prevention layer made of a material for preventing mutual diffusion joining of the thin plate members is advantageously formed on at least a lamination surface of the plurality of thin plate members. . Thereby, at the time of diffusion bonding, diffusion bonding of at least the laminated surfaces of adjacent thin plate members is prevented, so that the thin plate member can be easily removed after molding of the molded body, the processing time is further reduced, and the cost is further reduced. Will be improved.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, in order to clarify the present invention more specifically, a specific configuration of the present invention will be described in detail with reference to the drawings.

First, FIG. 1 shows an example of a molded article formed by the laminate joining method according to the present invention.
In this figure, the molded body 2 has a shape including a base 4, a center 6, and a tip 8. More specifically, such a molded body 2 is formed from the end surface on the small diameter side of the base 4 having a truncated cone shape.
The cylindrical central portion 6 extends in one direction while being inclined, while the cylindrical tip portion 8 has a shape in which it extends in an inclined direction different from the inclined direction of the central portion 6 from the end face of the central portion 6. .

The material of the thin plate forming material for forming the formed body 2 having such a shape by the lamination bonding forming method according to the present invention is a material which undergoes creep deformation at a high temperature, in other words, a material which can be diffusion bonded. If you have, ceramics,
Any of an intermetallic compound, a long fiber reinforced composite material, and a composite material formed by lamination can be appropriately adopted. More specifically, as the ceramic, silicon nitride ceramic, alumina ceramic, or the like is employed. As the intermetallic compound, for example, titanium aluminum (Ti ₃ Al) can be used. Further, as the long fiber reinforced composite material, a silicon nitride based composite material reinforced with carbon fiber, etc., and as the laminated molded material, aluminum, titanium, etc. reinforced with carbon fiber or silicon carbide long fiber woven fabric. Can be adopted. It is needless to say that the laminate bonding method according to the present invention can be applied to materials other than the above examples, for example, metal materials, as long as they can be diffusion bonded.

Further, the material of the thin plate material having the forming holes respectively corresponding to the plurality of sections for providing the target formed body 2 can be appropriately selected from the above-mentioned thin plate material. It is desirable that the material is the same as the material of the thin plate material to be used. However, there is a possibility that the material of the sheet material may be vaporized by heating during diffusion bonding, but by making the material of the sheet material the same as that of the sheet material,
Even in the case where such vaporization occurs, the contamination of the joining surface between the adjacent thin sheet moldings is prevented, and the molding 2
This is because it is possible to prevent a decrease in characteristics such as strength of the steel. At the same time, by making the material of the thin plate material and the thin plate material the same, it is possible to prevent the occurrence of thermal stress that may be caused by the difference in the thermal expansion coefficient between the thin plate material and the thin plate material,
An effect of preventing breakage of the molded body 2 due to excessive thermal stress can also be obtained. Furthermore, by making the material of the thin plate material and the thin plate material the same, their creep deformation characteristics become equal, and the surface pressure exerted on the cross section composed of the thin plate material and the thin plate material by the pressing force from the pressing device. However, as a result of being substantially uniform in each cross section, the joining surface pressure between the adjacent thin sheet forming materials becomes substantially uniform in the laminating direction,
Thereby, the joining of the sheet metal members in the laminating direction becomes more uniform.

As shown in FIG. 2, the sheet material 10 is formed from the above-mentioned materials by known means.
Each having a predetermined thickness and a target molded body 2
Into a plurality of sections, that is, the molded body 2 divided in the laminating direction at intervals substantially equal to the thickness of the thin plate molded material 12 so as to have the molding holes 14 having the corresponding shapes, respectively. 12 is formed to have a predetermined thickness and a shape corresponding to each of the forming holes 14 of the thin plate member 10, in other words, to have a shape of each of a plurality of sections that give the target formed body 2. Will be done.
Here, the thickness of the thin plate forming material 12 is determined from the viewpoint of the formability of the material to be used and the reproducibility of the shape of the target formed body 2.
On the other hand, the thickness of the thin plate member 10 is set to be substantially the same as the thickness of the thin plate member 12 except for a case where a joining prevention layer described later is formed on the surface thereof. Also, if necessary,
The shape of the forming hole 14 of the thin plate member 10 and the shape of the corresponding thin plate member 12 are such that the forming hole 14 of the thin plate member 10 fits into the forming hole 14 of the thin plate member 10.
The gap may be dimensioned such that a predetermined gap is formed between the sheet material 12 and the sheet material 12, and the value of the gap is appropriately determined according to the material of the sheet material 10 and the material of the sheet material 12.

The thin plate member 10 and the thin plate member 12 are desirably formed by first forming a thin plate having a predetermined thickness by a known method, and then forming each of the thin plates. Cutting is performed by a known means such as a laser beam, an electron beam, or a water jet, and the corresponding thin sheet material 10 and thin sheet forming material 12 are simultaneously formed. As a result, the material cost can be reduced and the processing time can be shortened. As a result, the productivity and cost of the molded body 2 can be greatly improved. Further, between the forming hole 14 of the thin plate member 10 and the corresponding thin plate member 12,
Even when a predetermined gap is formed in a state where the thin plate member 12 is fitted into the forming hole 14 of the thin plate member 10, the gap can be easily realized by adjusting the cutting margin at the time of cutting. Can be done.

Furthermore, it is desirable that the outer peripheral shape of the thin plate member 10 is all the same, and thus, the thin plate member 10 and the thin plate forming member 12 corresponding to the forming hole 14 are combined to form the inside of the forming hole 14. Under the condition that the thin plate material 12 is fitted into the thin plate member 12, the shape obtained by sequentially stacking the plurality of thin plate members 10 and the plurality of thin plate members 12 becomes a simple shape having a constant cross-sectional area. As a result, the surface pressure exerted on each section composed of the thin plate member 10 and the thin plate member 12 becomes substantially equal. As a result, the joining surface pressure between the adjacent thin plate members becomes substantially uniform in the laminating direction. The joining of the sheet metal members in the stacking direction is more uniform. In addition to it,
By aligning the outer perimeters of the thin plate members 10, the relative positioning of the thin plate members 10 can be performed, and the mutual positioning of the thin plate members 10 can be easily and accurately performed. The positioning of the members 12 relative to each other can be performed easily and accurately.

Further, it is more desirable that the outer peripheral shape of the thin plate member 10 be a shape corresponding to the inner surface shape of the uniaxial pressing die as illustrated in FIG. As a result, the outer periphery of the thin plate member 10 is abutted and supported by the pressing die, so that the thin plate member 10 can be securely held even during the pressurization during the diffusion bonding, and the thin plate member 1 during the pressurization is pressed.
Occurrence of a shift in a plane perpendicular to the lamination direction of 0 is effectively prevented, and the positional relationship between the thin plate forming materials 12 is reliably maintained. At the same time, thin sheet material 1
0 The relative positioning of each other can be carried out by contact with the inner surface of the uniaxial pressing mold, so that the mutual positioning of the thin plate members 10 and, thus, the mutual positioning of the thin plate members 12 can be made easier and easier. Can be done accurately. In the case where the outer peripheral shape of the thin plate member 10 is not a shape corresponding to the inner surface shape of the uniaxial pressing die, a means for preventing the thin plate members 10 from shifting from each other may be separately formed on the thin plate member 10.

In laminating the thin plate member 10 and the thin plate member 12, the relative positioning of the thin plate member 12 is determined by the outer peripheral shape of the thin plate member 10 and the pressing shape of the thin plate member 10 as described above. Although it can be carried out by utilizing contact with the inner surface or the like, separately or in combination therewith, in order to perform relative positioning between the thin plate members 10, forming holes are formed in each of the thin plate members 10. Positioning means such as holes and corners having a predetermined positional relationship with respect to 14,
As long as there is no problem in strength and rigidity under heating and pressurization, it may be appropriately provided.

Further, each of the thin plate members 1 formed as described above
0 is a row of holes 16 or a notch 1 as shown in FIG.
8 may be appropriately formed as long as there is no problem in strength and rigidity under heat and pressure. by this,
The removal of the thin plate material 10 after the molding of the molded body 2 can be performed more easily and in a short time, and the productivity and cost performance of the molded body 2 can be further improved. In addition, these holes 1
By providing the six rows and the notches 18 so as to have a predetermined positional relationship with respect to the forming holes 14 of the respective thin plate members 10, the rows and the notches 18 of the holes 16 are used to make the relative positions of the thin plate members 10 relative to each other. Positioning can be performed,
Thus, the positioning means can be omitted.

By the way, it is desirable to form a bonding prevention layer made of a material for preventing diffusion bonding between the thin plate members 10 on at least the lamination surface of the thin plate member 10 thus formed. At the time of joining, at least joining of the adjacent thin plate members 10 is prevented, and the removal of the thin plate members 10 after the molding of the molded body 2 is facilitated, so that productivity and cost efficiency are further improved.

The material of such a bonding prevention layer may be any material that is stable under the temperature and pressure at which diffusion bonding is performed and does not react with the material of the thin plate member 10 and the thin plate member 12. It is appropriately determined according to the type of material of the thin plate forming material 12 and the atmosphere at the time of diffusion bonding, and such a bonding prevention layer is formed on the surface of the thin plate material 10 by a known method according to the material of the bonding prevention layer to be used. Is done. More specifically, from the viewpoint of stability at high temperatures, carbon and non-sinterable ceramics such as boron nitride are suitable as materials for the bonding prevention layer, and coating or fine powdering of those materials by sputtering or the like. By the application in a state or the like, a joining prevention layer is formed on the surface of the thin plate material 10. Similar effects can also be obtained by sandwiching a thin film made of these materials between the thin plate members 10. For example, when the thin plate member 10 and the thin plate forming material 12 are both silicon nitride ceramics and the diffusion bonding is performed in a nitrogen gas atmosphere, fine powder of boron nitride is preferably used, and the fine powder of boron nitride is used as a slurry. Shape material 10
For example, a coating can be advantageously applied to form a bonding prevention layer.

It is to be noted that the above-described effect can be sufficiently exerted if such a joining prevention layer is formed on the laminating surface of the thin plate member 10, but the inner peripheral surface and the outer peripheral surface of the thin plate member 10 can be obtained. It is more preferable to form the inner peripheral surface of the molding hole 14 of the thin plate member 10 and to fit into the diffusion member, not only to prevent the adjacent thin plate members 10 from being joined to each other during diffusion bonding. Bonding between the outer peripheral surface of the thin plate forming material 12 and between the outer peripheral surface of the thin plate molding 10 and the inner surface of the uniaxial pressing die is also reliably prevented, and the removal of the thin plate molding 10 after the molding of the molded body 2 is performed. , And the productivity and cost are further improved.

The thickness of the joining prevention layer should be thin as long as the joining between the adjacent thin plate members 10 can be prevented, so that the thickness of the thin plate member 10 and the thin plate forming member 12 can be reduced. And the forming hole 1
4, it is possible to suppress the influence of a shift in the laminating direction between the sheet forming material 12 and the thin plate forming material 12, but the thickness of the joining prevention layer is less than the thickness of the sheet forming material 10 or the sheet forming material 12. In comparison, when the thickness cannot be so reduced, the thickness of the thin plate member 10 may be smaller than the thickness of the thin plate member 12.

Then, the thin plate member 10 formed into a predetermined shape as described above and the thin plate forming material 12 corresponding to the forming hole 14 are combined to form a thin plate in the forming hole 14 as illustrated in FIG. Under the condition that the molding material 12 is fitted, the plurality of thin plate members 10 and the plurality of
Are sequentially stacked in a predetermined order for giving the shape of the molded body 2 to form a laminate 20 composed of the thin plate material 10 and the thin plate molded material 12 as shown in FIG. And a uniaxial pressing mold (22) made of a known material such as graphite. In this embodiment, the positional relationship between the thin plate members 10 is determined by the contact of the thin plate members 10 with the inner surface of the pressing die, and the mutual displacement of the thin plate members 10 is also prevented thereby. It is not necessary to use other positioning means or deviation prevention means. However, when positioning and prevention of deviation between the thin plate members 10 are performed by the positioning means and deviation prevention means provided on the thin plate member 10, etc. , Thin plate material 10
And at the time of lamination of the thin plate forming material 12 or the like.

Next, as shown in FIG. 5, the laminated body 20 accommodated in the inner surface of the uniaxial pressurizing mold 22 with almost no gap is placed in an electric furnace or the like under an inert gas atmosphere such as nitrogen. After being heated to a predetermined temperature by a known heating device 24, a known uniaxial pressing device 2 is applied from both sides in the laminating direction.
6 and 26 are uniaxially pressurized with a predetermined pressing force, and the thin sheet moldings 12 adjacent to each other are diffusion bonded. More specifically, the thin sheet material 12 undergoes creep deformation due to pressurization under heating, and mass transfer occurs by diffusion in the vicinity of the lamination surface of the adjacent thin sheet materials 12. And mass transfer from one sheet metal 12 to the other sheet metal 12 across the lamination surface,
And, by the mass transfer in the opposite direction, the lamination surface is closed and the joining is completed. The temperature at which such diffusion bonding is performed and the pressing force of the uniaxial pressing device depend on the material of the thin plate forming material 12, and the thin plate forming material 12 has sufficient creep deformation to have a predetermined strength. , Thin sheet material 1
It is determined appropriately so that the two are joined together.

Thereafter, the thin plate member 10 is removed from the periphery of the joined body thus obtained by a known cutting means or the like to obtain the desired molded body 2. At this time, In the case where the joining prevention layer is formed on the thin plate member 10, since the diffusion bonding between the thin plate members 10 is prevented by the joining preventing layer, it is necessary to remove the thin plate members 10 one by one from around the joined body. It becomes possible. In addition, in the case where a row of holes 16 and cuts 18 as shown in FIG. 3 are formed in the thin plate member 10 in addition to such a joining prevention layer, a predetermined tool is provided in such a hole 16. And apply force, and cut 1
As shown in FIG. 6, the thin plate member 10 can be easily broken and removed by, for example, causing a stress concentration at the tip portion of the thin plate 8. In addition, on the surface of the obtained molded body 2,
If a step-like mark due to lamination of the thin plate material and the thin plate forming material remains, it may be removed by a known grinding process or the like.

Thus, in the lamination bonding molding method of the embodiment according to the present invention, the desired molded product 2
Holes 1 each having a shape corresponding to a plurality of sections giving
4 and a plurality of thin-plate moldings 12 having a shape corresponding to each of the forming holes 14 of the plurality of thin-plate moldings 10 in the thin-plate molding 10 having an outer peripheral shape corresponding to the inner surface shape of the uniaxial pressing mold 22. Under the fitted state, the plurality of thin plate members 10 and the plurality of thin plate members 12 are sequentially laminated and accommodated in the uniaxial pressing die 22 with almost no gap, and the thin plate member 10 The mutual positional relationship is easily and accurately determined by the inner surface of the uniaxial pressing mold 22 and the like, whereby the positioning of the thin sheet moldings 12 fitted into the molding holes 14 of the respective thin sheet moldings 10 can be performed easily and accurately. It will be done.

According to the method of the present invention, the thin plate member 10 and the thin plate member 12 corresponding to the forming hole 14 are formed.
In a state where the thin plate forming material 12 is fitted in the forming hole 14, the plurality of thin plate members 10 and the plurality of thin plate forming materials 12 are sequentially stacked to form a laminate 2.
Since the shape of 0 becomes a simple shape having a constant cross-sectional area, the surface pressure exerted on the respective cross-sections of the thin plate member 10 and the thin plate member 12 by the pressing force from the uniaxial pressing devices 26, 26 is substantially As a result, the bonding surface pressure between the adjacent sheet metal members becomes substantially uniform in the laminating direction, and large deformation is prevented from occurring in the sheet metal member 12 having a small area of the stacking surface. At the same time, the sheet material 12
Is reliably supported by the thin plate member 10 into which it is fitted and the thin plate members 10 above and below the thin plate member 10, and the bending moment and the torsional moment are generated by the pressing force from the uniaxial pressing devices 26, 26. Is effectively suppressed from being generated in the laminated portion of the thin plate forming material of the laminate 20, whereby even when the pressing force of the uniaxial pressing devices 26, 26 is large, the thin plate forming material of the laminate 20 is reduced. , And the molded body 2 are prevented from being locally greatly deformed due to buckling or the like. As a result, it is possible to apply a higher joining surface pressure to the laminated portion of the thin plate forming material of the laminate 20 without significantly deforming the laminated portion of the thin plate forming material of the laminate 20. Properties such as strength can be improved.

Further, in the method of the present invention, since the molded body 2 is joined and formed by diffusion joining of the adjacent thin sheet moldings 12, the joining method such as brazing or adhesion is used. Unlike molding, the obtained molded body 2
Can be homogeneous and have properties such as strength of the material at the joint surface.

Furthermore, in the method of the present invention, since uniaxial pressing is employed as the pressing method, the inner surface of the forming hole 14 of the thin plate material 10 and the thin plate forming material 12
, The contact surface pressure with the outer peripheral surface is kept low, the removal of the thin plate material 10 from around the molded body 2 after the molding of the molded body 2 becomes easy, and the processing time is shortened.

Therefore, according to the method of the present invention,
Despite its excellent properties such as ceramics, intermetallic compounds, long-fiber reinforced composite materials, and laminated composite materials, it has been difficult to mold members with complex shapes, which has prevented its use. It is possible to rapidly form a homogeneous and complex shaped object consisting of the following, having an accurate predetermined shape and properties such as sufficient strength, at a low processing cost.

[0041]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described. However, the present invention is not limited by the description of such embodiments. Needless to say, it is not.
In addition, in addition to the following examples, the present invention, in addition to the above-described specific description, various changes, corrections, and modifications based on the knowledge of those skilled in the art without departing from the spirit of the present invention. It should be understood that improvements can be made.

A thin plate having a thickness of 1 mm of cubic zirconia ceramics containing 3 mol% of yttria added thereto was coated with a carbon dioxide gas laser, and the diameter thereof was 32, corresponding to the inner surface of a uniaxial pressing mold.
After cutting into a disk having a diameter of 1 mm, predetermined positions of each of the thin disks thus obtained were subjected to the same means, using the same means, for an outer diameter of 18 mm, a number of teeth of 8, and a total tooth length of 3.5 mm. By cutting into a gear shape having a thickness of 1 mm, it has a gear-shaped forming hole, and corresponds to a thin plate material having an outer peripheral shape corresponding to the inner surface of a uniaxial pressing mold, and a shape of the forming hole. And a thin plate formed material having the shape shown in FIG. Next, a plurality of cuts were formed on the outer periphery of each of the obtained thin plate members using a carbon dioxide gas laser.

Then, the thus obtained thin plate material is combined with a thin plate material corresponding to its forming hole,
Under a state where the thin sheet material is fitted into the forming hole of the thin sheet material, the five thin sheet materials and the thin sheet material are sequentially stacked while positioning by the cuts provided in each of the thin sheet materials. A laminate was formed. At that time, a thin sheet of carbon having a thickness of about 0.1 mm was sandwiched between the laminated surfaces of the thin plate members. Thereafter, the laminate obtained by combining the two is placed in a graphite mold having substantially the same inner diameter corresponding to the outer peripheral shape of the thin plate member, and subjected to uniaxial pressurization at 1430 ° C. and 10 MPa in nitrogen gas to form an adjacent thin plate. The molded materials were diffusion bonded to each other, and the thin plate material was removed to obtain a gear-shaped member made of zirconia ceramics.

[0044]

As is apparent from the above description, according to the lamination joining method according to the present invention, the positioning of the thin sheet materials can be easily and accurately performed by the forming holes of the thin sheet material, and the object is achieved. Regardless of the shape of the molded body, the pressing force from the uniaxial pressing means prevents the molded body from being locally largely deformed due to buckling or the like. It is possible to improve the properties such as the strength of the molded body.

Therefore, according to the method of the present invention,
Materials that are difficult to mold, such as ceramics, intermetallic compounds, long-fiber reinforced composite materials, and laminated composite materials, despite their excellent properties, which have prevented their use A molded article having a uniform, uniform, high bonding strength and an accurate predetermined shape can be easily formed quickly and at low cost, and thereby, due to the excellent properties of these materials, It is possible to improve the performance of the system incorporating the material, and expect a very widespread ripple effect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a molded body in a lamination joining molding method according to the present invention.

FIG. 2 is a cross-sectional view of the laminated joining method according to the present invention, in which a thin plate member and a thin plate member having a shape corresponding to the forming hole of the thin plate member are separated, and the thin plate member is fitted into the forming hole of the thin plate member; FIG.

FIG. 3 is a perspective view showing an example in which rows and cuts of holes are formed in a thin plate material in the lamination joining method according to the present invention.

FIG. 4 is a perspective view showing an example of a laminate obtained by laminating a plurality of thin plate members and thin plate members in the laminate joining method according to the present invention.

FIG. 5 is a cross-sectional view showing an arrangement of a laminate in a uniaxial pressing mold in a diffusion bonding step in a laminate bonding method according to the present invention.

FIG. 6 is a perspective view showing an example of removal of a thin plate member after joining of a molded article in the laminate joining method according to the present invention.

[Explanation of symbols]

 Reference Signs List 2 Molded product 4 Base 6 Central part 8 Tip 10 Thin sheet material 12 Thin sheet molding material 14 Forming hole 16 Hole 18 Notch 20 Laminated body 22 Uniaxial pressing mold 24 Heating device 26 Uniaxial pressing device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B23K 20/00 310 B23K 20/18 B32B 31/04 B32B 31/20

Claims (2)

(57) [Claims] 1. A plurality of thin plate members each having a forming hole having a shape corresponding to each of a plurality of sections for providing a target formed body, and having a shape corresponding to each of the forming holes of the plurality of thin plate members. Prepare a plurality of sheet moldings, and then combine the sheet molding and the sheet molding corresponding to the molding hole, and in a state where the sheet molding is fitted in the molding hole, the plurality of sheet moldings are prepared. After sequentially stacking the thin plate member and the plurality of thin plate forming materials, by uniaxially pressing in the laminating direction thereof, the plurality of stacked thin plate forming materials were integrally diffusion-bonded to each other, and obtained. Removing the plurality of thin plate members from around the joined body,
A laminate bonding molding method characterized by obtaining a desired molded body. 2. The method according to claim 1, wherein a bonding prevention layer made of a material for preventing the diffusion bonding of the thin plate members is formed on at least a lamination surface of the plurality of thin plate members. .