JP4126966B2 - Bonding structure of main body and lid - Google Patents

Bonding structure of main body and lid Download PDF

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Publication number
JP4126966B2
JP4126966B2 JP2002168006A JP2002168006A JP4126966B2 JP 4126966 B2 JP4126966 B2 JP 4126966B2 JP 2002168006 A JP2002168006 A JP 2002168006A JP 2002168006 A JP2002168006 A JP 2002168006A JP 4126966 B2 JP4126966 B2 JP 4126966B2
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Japan
Prior art keywords
lid
groove
main body
joined
joining
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JP2002168006A
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Japanese (ja)
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JP2004009113A (en
Inventor
和孝 岡本
昌之 土井
聡 平野
正寿 稲垣
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Hitachi Ltd
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Hitachi Ltd
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Description

【０００１】
【発明の属する技術分野】
本発明は本体内部に溝を有し、該溝が該溝より幅の大きい蓋で覆われ、該本体と蓋が接合された冷却板，吸引板などの構造体に関する。
【０００２】
【従来の技術】
本体に切削加工などでＩ字型，Ｕ字型，Ｓ字型，Ｗ字型，円型，螺旋型などの形状の溝を形成し、該本体に蓋を被せ接合した構造体は、例えば冷却板，吸引板などとして利用されている。特開２００１−３１３３５７号公報には、本体に形成された溝を該溝よりわずかに大きい蓋で覆い、摩擦攪拌接合により突合せ接合する方法が開示されている。
【０００３】
【発明が解決しようとする課題】
従来技術に記載の突合せ接合では、本体に形成された溝がＵ字型であれば、蓋も同様にＵ字型にあわせ加工せねばならず、加工に手間とコストがかかる。これに対し、蓋を本体よりわずかに小さい外寸法とし、蓋の周囲は本体と突合せ接合し、蓋の内側部は本体と重ね接合することにより、いくつかのメリットがでる。１つ目は、蓋は溝とあわせ加工しなくてもよく、蓋の加工に要した手間とコストが軽減される。２つ目は、溝を封止するために必要な接合個所を突合せ接合の場合よりも減らすことができる。しかし、重ね接合した場合には、突合せ接合した場合に比べて接合深さが大きくなりやすく、熱歪が生じて重ね部にギャップが生じ接合品質が悪くなり易い。
【０００４】
本発明の目的は、溝を有する本体と蓋とを摩擦攪拌接合技術により接合した接合体において、重ね接合を行った場合の熱歪を低減できるようにしたことにある。
【０００５】
【課題を解決するための手段】
本発明は、接合される部位に沿った蓋の表面に溝状の凹部を形成し、摩擦攪拌接合法により該溝状の凹部に沿って接合することにより、重ね接合した場合でも接合深さを大きくしないですむようにしたものである。
【０００６】
本発明の一実施形態では、接合される部位に沿った蓋の表面に溝状の凹部が形成され、該蓋は該本体とほぼ同じ外寸法を有し、摩擦攪拌接合法により該溝状の凹部に沿って重ね接合される。
【０００７】
他の実施形態では、接合される部位に沿った蓋および本体の表面に溝状の凹部を有し、蓋は本体よりわずかに小さい外寸法を有し、摩擦攪拌接合法により該溝状の凹部に沿って該蓋の周囲は該本体と突合せ接合され、該蓋の内側部は重ね接合される。
【０００８】
本発明において、前記溝の形状は、Ｉ字型，Ｕ字型，Ｓ字型，Ｗ字型，円型，螺旋型など任意である。本体および蓋の材料は、たとえば銅，銅合金，アルミニウムおよびアルミニウム合金である。本発明の接合構造体は、前記溝を冷媒の通路とする冷却板あるいは前記溝を潤滑剤の通路とする部品等に使用される。また、本体または蓋のいずれかに微細な貫通孔を形成し、本体に形成された溝を吸引用の通路とする吸引板としても使用できる。
【０００９】
【発明の実施の形態】
本発明の実施例を説明する前に、摩擦攪拌接合により突合せ接合する場合と、重ね接合する場合とについて、図１０及び図１１を用いて説明する。
【００１０】
突合せ接合する場合には、溝２を有する本体１と蓋３の突合せ面にツール４を挿入する。ツール４は、ショルダー５及びピン６からなる。摩擦攪拌接合では、ツールを設計する場合、通常接合深さとほぼ同等になるようにピンの長さを設計する。接合深さが大きくなるほど、ショルダー５の直径も大きくなる。摩擦攪拌接合における熱源は、ツール４と被接合材との摩擦熱である。ショルダー５の直径が大きいほど、接合入熱は増加し、接合後の接合変形が大きくなる。被接合材の材質，全板厚が同じ場合、一般には接合深さが大きくなるほど接合変形は大きくなる。図１１に示すように重ね接合した場合、被接合材の材質が突合せ接合の場合と同じであれば、接合深さは必然的に突合せ接合の場合よりも大きくなる。すなわちツール４も大きくなり、接合変形も大きくなる。特に摩擦攪拌接合では、入熱はツール４の摩擦熱で材料に投入され、被接合材中にはその熱拡散で伝達する。すなわち図１１の場合、ツール４を被接合材に挿入する際、まず蓋３に熱が入り、ツール４の挿入とともに本体にも熱が入る。温度は蓋３で高く、本体１で低く部材間での温度勾配が形成される。このため蓋３の熱膨張が大きくなり、熱変形は蓋３で大きくなる。蓋３が変形した場合、蓋３と本体１の重ね部にギャップが生じ、本体１への入熱が十分に行われず、接合品質に問題をきたす。したがって重ね接合では、蓋３の変形抑制が最も重要な施工因子となる。もちろんジグ等で強固に蓋３を固定することも有効ではあるが、本質的な問題は、ツール４を小型化し接合入熱を低減することにある。なおツール材料を高強度とし、ツールを小型化することも一つの手法ではあるが、ツール材料が同一の場合、やはりツール形状を小型化する必要がある。
【００１１】
次に本発明について説明する。図１に示すような予め切削加工により溝２が形成された本体１のＡ−Ａ′断面が図２である。これに蓋３を被せた様子を図３に示す。本体１および蓋３の接合される部位には予め切削加工により凹部７が形成されている。次に図４に示すように回転するツール４を各接合部位に沿って走査し、接合を実施する。接合は、図６に示すように突合せ接合部８と重ね接合部９ａ，９ｂ，９ｃが形成される。本体に予め形成される溝は、Ｉ字型，Ｕ字型，Ｓ字型，Ｗ字型，円型，螺旋型などである。本体および蓋の材質は、アルミニウム，アルミニウム合金，銅あるいは銅合金などである。前記構造体は、冷却板，吸引板などである。このような構造体は、接合後に接合変形を矯正した後、構造体表裏面を最終的には研削し、図９に示すように平坦かつ平行に仕上げることが一般的である。したがって本体１および蓋３の接合される部位に予め切削加工により形成される凹部７の深さは、最終的に研削する仕上げ代より小さければよい。また蓋３のうちで接合経路以外の部分の板厚が極力厚いことにより、蓋３の面剛性が向上するため、蓋の変形防止の効果がある。また接合に使用するツール４は、凹部７がない場合に比較して小さくできるため、接合入熱が減少し接合変形が小さくなり、矯正工程が軽減され構造体の製造コストおよび時間が軽減される。
【００１２】
（実施例１）
本発明に従い、銅製の冷却板を製造した。本体１には、図１に示すように予め切削加工により蛇行した溝２が形成されている。本体１の材質は無酸素銅であり、形状は長さ６００mm，幅３００mm，最大厚さ１５mmである。溝２はＷ字型に形成され、深さは５mmである。本体１のＡ−Ａ′断面が図２であり、これに蓋３を図３に示すように被せる。蓋３の材質も同様に無酸素銅であり、最大厚さ４mmである。本体１および蓋３の接合される部位には予め切削加工により凹部７が形成されている。すなわち蓋３と突合せ接合される部位の本体１の板厚は１４mmであり、本体１と重ね接合される部位の蓋の板厚は３mmである。
【００１３】
接合手順は次の通りである。まず蓋３の外周部をショルダー直径１３mm，ピン直径４mm，長さ１mmのツールを用いて、長さ２０mm，間隔１００mmで仮付けした。ツール回転数および接合速度は、それぞれ１４００rpm および２００mm／min とした。次に図４に示すように回転するツール４を用いて本体１と蓋３の接合を実施した。ツール４はショルダー直径１４mm，ピンの大径部直径６mm，小径部直径４mm，長さ５mmの形状とした。ツール４の回転数は１４００rpm とした。まず回転するツール４を接合部にゆっくりと挿入した後、接合線に沿って移動した。接合速度は３００mm／min とした。図５に示すように、蓋３の外周部１０を突合せ接合した後、蓋３の内側の重ね接合線１１ａ，１１ｂ，１１ｃの順に重ね接合した。なお摩擦攪拌接合では、接合終端部にピン部の形状に相当する孔が残存する。本実施例では、図示していない長さ方向の削り代の部位に終端部を形成した。接合後、図６に示すように突合せ接合部８と重ね接合部９ａ，９ｂ，９ｃが形成される。図７および図８に、突合せ接合部８および重ね接合部９ａのミクロ組織を示す。いずれの場合も蓋３および本体１は隙間や欠陥なく強固に接合されている。なお接合ままの段階での長手方向の反りは、約１.２mm であり十分に小さい。矯正により冷却板を平坦化した後、表面研削により仕上げ、上面最大切削量１.５mm ，下面最大切削量０.５mm として図９に示すように全厚１３.０mm とした。
【００１４】
【表１】

Figure 0004126966
【００１５】
表１に本実施例の方法により形成された溝２の耐圧性を、Ｈｅリークテストにより評価した結果を示す。リークテストは１×１０-7Ｐａでの漏洩試験であり、比較材として現用の電子ビーム溶接材を用いた。本実施例により摩擦攪拌接合した場合、不良率は０％で全数合格であったが、電子ビーム溶接材では不良率は５％と高い。この場合、漏洩部を再度補修せねばならず、補修のコストも考慮すると摩擦攪拌接合は非常にコストメリットが高い。
【００１６】
【発明の効果】
本発明によれば、摩擦攪拌接合により接合した蓋と本体からなる構造体は、接合に伴う熱歪が小さいため高品質である。
【図面の簡単な説明】
【図１】溝を有する本体を示す平面図。
【図２】溝を有する本体を正面からみた断面図。
【図３】本体に蓋をかぶせた状態を示す断面図。
【図４】本体と蓋の接合の施工方法を示す断面図。
【図５】本体と蓋の接合の施工手順を示す平面図。
【図６】本体と蓋の接合施工後を示す断面図。
【図７】本発明の実施例による突合せ接合部のミクロ組織図。
【図８】本発明の実施例による重ね接合部のミクロ組織図。
【図９】本発明の実施例による構造体の最終仕上げ後の断面図。
【図１０】突合せ接合の例を示す断面図。
【図１１】重ね接合の例を示す断面図。
【符号の説明】
１…本体、２…溝、３…蓋、４…ツール、５…ショルダー、６…ピン、７…凹部、８…突合せ接合部、９ａ，９ｂ，９ｃ…重ね接合部、１０…外周部、１１ａ，１１ｂ，１１ｃ…重ね接合線。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure such as a cooling plate or a suction plate having a groove inside a main body, the groove being covered with a lid having a width wider than the groove, and the main body and the lid being joined.
[0002]
[Prior art]
A structure in which a groove having a shape such as I-shape, U-shape, S-shape, W-shape, circular shape, spiral shape, etc. is formed in the main body by cutting or the like, and the main body is covered with a lid and joined. It is used as a plate and suction plate. Japanese Patent Application Laid-Open No. 2001-313357 discloses a method in which a groove formed in a main body is covered with a cover slightly larger than the groove and butt-joined by friction stir welding.
[0003]
[Problems to be solved by the invention]
In the butt joint described in the prior art, if the groove formed in the main body is U-shaped, the lid must be processed similarly to the U-shape, which requires labor and cost for processing. On the other hand, there are several merits by setting the lid to a slightly smaller outside size than the main body, butting the joint around the lid with the main body, and overlapping the inner portion of the lid with the main body. First, it is not necessary to process the lid together with the groove, and the labor and cost required for processing the lid are reduced. Second, it is possible to reduce the number of joints necessary for sealing the groove as compared with the case of butt joint. However, in the case of lap joining, the joining depth is likely to be larger than in the case of butt joining, and thermal strain is generated, resulting in a gap in the overlapped portion, which tends to deteriorate the joining quality.
[0004]
An object of the present invention is to reduce thermal strain when lap joining is performed in a joined body in which a main body having a groove and a lid are joined by a friction stir welding technique.
[0005]
[Means for Solving the Problems]
The present invention forms a groove-like recess on the surface of the lid along the part to be joined, and joins along the groove-like recess by a friction stir welding method, so that the joining depth can be increased even when lap joining is performed. It's something you don't want to make big.
[0006]
In one embodiment of the present invention, a groove-like recess is formed on the surface of the lid along the part to be joined, the lid has substantially the same outer dimensions as the main body, and the groove-like recess is formed by friction stir welding. Overlapping is performed along the recess.
[0007]
In another embodiment, the lid has a groove-like recess on the surface of the lid and the body along the part to be joined, and the lid has a slightly smaller outer dimension than the body, and the groove-like recess by friction stir welding. The periphery of the lid is butt-joined with the main body, and the inner part of the lid is lap-joined.
[0008]
In the present invention, the shape of the groove is arbitrary such as I-shaped, U-shaped, S-shaped, W-shaped, circular, and spiral. The material of the main body and the lid is, for example, copper, copper alloy, aluminum, and aluminum alloy. The joint structure of the present invention is used for a cooling plate using the groove as a coolant passage or a component using the groove as a lubricant passage. Further, it can be used as a suction plate in which a fine through hole is formed in either the main body or the lid, and a groove formed in the main body is used as a suction passage.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Before explaining the embodiments of the present invention, the case of butt joining by friction stir welding and the case of lap joining will be described with reference to FIGS.
[0010]
In the case of butt joining, the tool 4 is inserted into the butt surface of the main body 1 having the groove 2 and the lid 3. The tool 4 includes a shoulder 5 and a pin 6. In friction stir welding, when designing a tool, the length of the pin is designed to be approximately equal to the normal joining depth. As the joining depth increases, the diameter of the shoulder 5 also increases. The heat source in the friction stir welding is friction heat between the tool 4 and the material to be joined. As the diameter of the shoulder 5 is larger, the joining heat input is increased and the joining deformation after joining is increased. When the material of the materials to be joined and the total plate thickness are the same, generally, the joining deformation increases as the joining depth increases. In the case of lap joining as shown in FIG. 11, if the material of the materials to be joined is the same as in the case of butt joining, the joining depth is necessarily larger than in the case of butt joining. That is, the tool 4 is also increased and the joint deformation is also increased. Particularly in friction stir welding, heat input is input to the material by the frictional heat of the tool 4 and is transmitted to the material to be joined by the thermal diffusion. That is, in the case of FIG. 11, when the tool 4 is inserted into the material to be joined, heat first enters the lid 3, and heat enters the main body as the tool 4 is inserted. The temperature is high at the lid 3 and low at the main body 1 to form a temperature gradient between the members. For this reason, the thermal expansion of the lid 3 increases, and thermal deformation increases at the lid 3. When the lid 3 is deformed, a gap is generated in the overlapping portion between the lid 3 and the main body 1, and heat input to the main body 1 is not sufficiently performed, which causes a problem in bonding quality. Therefore, in the lap joint, the deformation control of the lid 3 is the most important construction factor. Of course, it is effective to firmly fix the lid 3 with a jig or the like, but the essential problem is to reduce the size of the tool 4 and reduce the heat input. Although it is one method to increase the strength of the tool material and reduce the size of the tool, it is also necessary to reduce the size of the tool if the tool material is the same.
[0011]
Next, the present invention will be described. FIG. 2 is a cross-sectional view taken along the line AA ′ of the main body 1 in which the grooves 2 are formed in advance by cutting as shown in FIG. FIG. 3 shows how the lid 3 is covered. A concave portion 7 is formed in advance at a portion where the main body 1 and the lid 3 are joined by cutting. Next, as shown in FIG. 4, the rotating tool 4 is scanned along each bonding portion to perform bonding. As shown in FIG. 6, butt joint 8 and lap joints 9a, 9b, and 9c are formed. The grooves formed in advance in the main body are I-shaped, U-shaped, S-shaped, W-shaped, circular, spiral-shaped, and the like. The material of the main body and the lid is aluminum, aluminum alloy, copper or copper alloy. The structure is a cooling plate, a suction plate, or the like. In general, such a structure is corrected after joining deformation after joining, and finally the front and back surfaces of the structure are ground and finished flat and parallel as shown in FIG. Therefore, the depth of the concave portion 7 formed in advance by cutting at the portion where the main body 1 and the lid 3 are joined may be smaller than the finishing allowance for final grinding. Moreover, since the surface rigidity of the lid | cover 3 improves because the plate | board thickness of parts other than a joining path | route among the lid | covers 3 is as much as possible, there exists an effect of a deformation | transformation prevention of a lid | cover. Further, since the tool 4 used for joining can be made smaller than the case where there is no recess 7, joining heat input is reduced, joining deformation is reduced, the correction process is reduced, and the manufacturing cost and time of the structure are reduced. .
[0012]
(Example 1)
In accordance with the present invention, a copper cooling plate was produced. As shown in FIG. 1, the main body 1 is formed with grooves 2 meandering in advance by cutting. The material of the main body 1 is oxygen-free copper, and the shape is 600 mm in length, 300 mm in width, and 15 mm in maximum thickness. The groove 2 is formed in a W shape and has a depth of 5 mm. FIG. 2 is a cross-sectional view of the main body 1 taken along the line AA ′, and a lid 3 is placed on the main body 1 as shown in FIG. The material of the lid 3 is similarly oxygen-free copper and has a maximum thickness of 4 mm. A concave portion 7 is formed in advance at a portion where the main body 1 and the lid 3 are joined by cutting. That is, the plate thickness of the main body 1 at the portion to be butt-joined with the lid 3 is 14 mm, and the plate thickness of the lid at the portion to be overlap-joined with the main body 1 is 3 mm.
[0013]
The joining procedure is as follows. First, the outer periphery of the lid 3 was temporarily attached at a length of 20 mm and an interval of 100 mm using a tool having a shoulder diameter of 13 mm, a pin diameter of 4 mm, and a length of 1 mm. The tool rotation speed and joining speed were 1400 rpm and 200 mm / min, respectively. Next, the main body 1 and the lid 3 were joined using a rotating tool 4 as shown in FIG. The tool 4 has a shoulder diameter of 14 mm, a pin large diameter part diameter of 6 mm, a small diameter part diameter of 4 mm, and a length of 5 mm. The rotation speed of the tool 4 was 1400 rpm. First, the rotating tool 4 was slowly inserted into the joint, and then moved along the joint line. The joining speed was 300 mm / min. As shown in FIG. 5, after the outer peripheral portion 10 of the lid 3 was butt-joined, the lap joint lines 11 a, 11 b, and 11 c inside the lid 3 were joined in order. In the friction stir welding, a hole corresponding to the shape of the pin portion remains at the joining end portion. In this embodiment, the end portion is formed at a portion of the machining allowance in the length direction (not shown). After joining, as shown in FIG. 6, a butt joint 8 and overlap joints 9a, 9b, 9c are formed. 7 and 8 show the microstructures of the butt joint 8 and the lap joint 9a. In either case, the lid 3 and the main body 1 are firmly joined without gaps or defects. Note that the warpage in the longitudinal direction at the stage of bonding is approximately 1.2 mm, which is sufficiently small. After flattening the cooling plate by straightening, it was finished by surface grinding, and the maximum cutting amount on the upper surface was 1.5 mm and the maximum cutting amount on the lower surface was 0.5 mm, so that the total thickness was 13.0 mm as shown in FIG.
[0014]
[Table 1]
Figure 0004126966
[0015]
Table 1 shows the result of evaluating the pressure resistance of the groove 2 formed by the method of this example by the He leak test. The leak test was a leak test at 1 × 10 −7 Pa, and an existing electron beam welding material was used as a comparative material. When the friction stir welding was performed according to this example, the defect rate was 0% and the total number was acceptable, but in the electron beam welding material, the defect rate was as high as 5%. In this case, the leakage portion must be repaired again, and the friction stir welding is very cost-effective considering the repair cost.
[0016]
【The invention's effect】
According to the present invention, the structure composed of the lid and the main body joined by friction stir welding is of high quality because the thermal strain accompanying the joining is small.
[Brief description of the drawings]
FIG. 1 is a plan view showing a main body having a groove.
FIG. 2 is a cross-sectional view of a main body having a groove as viewed from the front.
FIG. 3 is a cross-sectional view showing a state where a lid is put on the main body.
FIG. 4 is a cross-sectional view showing a construction method for joining a main body and a lid.
FIG. 5 is a plan view showing a construction procedure for joining the main body and the lid.
FIG. 6 is a cross-sectional view showing a state after the main body and lid are joined.
FIG. 7 is a microstructure diagram of a butt joint according to an embodiment of the present invention.
FIG. 8 is a microstructure diagram of a lap joint according to an embodiment of the present invention.
FIG. 9 is a cross-sectional view after final finishing of a structure according to an embodiment of the present invention.
FIG. 10 is a cross-sectional view showing an example of butt joining.
FIG. 11 is a cross-sectional view showing an example of lap joining.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Groove, 3 ... Cover, 4 ... Tool, 5 ... Shoulder, 6 ... Pin, 7 ... Recessed part, 8 ... Butt joint part, 9a, 9b, 9c ... Overlap joint part, 10 ... Outer peripheral part, 11a , 11b, 11c ... lap joint lines.

Claims (7)

本体内部に溝を有し、該溝が該溝より幅の大きい蓋で覆われ、該本体と蓋が接合された構造体において、接合される部位に沿った該蓋の表面に溝状の凹部を有し、摩擦攪拌接合法により該溝状の凹部に沿って接合されていることを特徴とする接合構造体。  In a structure in which a groove is formed inside the main body, the groove is covered with a lid wider than the groove, and the main body and the lid are joined, a groove-like recess is formed on the surface of the lid along the part to be joined. And is joined along the groove-like recess by a friction stir welding method. 本体内部に溝を有し、該溝が該溝より幅の大きい蓋で覆われ、該本体と蓋が接合された構造体において、接合される部位に沿った該蓋の表面に溝状の凹部が形成され、該蓋は該本体とほぼ同じ外寸法を有し、摩擦攪拌接合法により該溝状の凹部に沿って重ね接合されていることを特徴とする接合構造体。  In a structure in which a groove is formed inside the main body, the groove is covered with a lid wider than the groove, and the main body and the lid are joined, a groove-like recess is formed on the surface of the lid along the part to be joined. And the lid has substantially the same outer dimensions as the main body, and is joined by lap joining along the groove-like recess by a friction stir welding method. 本体内部に溝を有し、該溝が該溝より幅の大きい蓋で覆われ、該本体と蓋が接合された構造体において、接合される部位に沿った該蓋および該本体の表面に溝状の凹部を有し、該蓋は該本体よりわずかに小さい外寸法を有し、摩擦攪拌接合法により該溝状の凹部に沿って該蓋の周囲は該本体と突合せ接合され、該蓋の内側部は重ね接合されていることを特徴とする接合構造体。  In a structure in which a groove is formed inside the main body, the groove is covered with a lid having a width wider than the groove, and the main body and the lid are bonded, the groove along the bonded portion and the surface of the main body The lid has a slightly smaller outer dimension than the main body, and the periphery of the lid is butt-joined to the main body along the groove-shaped concave portion by a friction stir welding method. A joining structure characterized in that the inner part is lap joined. 請求項１〜３のいずれか１つにおいて、前記溝はＩ字型，Ｕ字型，Ｓ字型，Ｗ字型，円型，螺旋型の少なくとも一つであることを特徴とする接合構造体。  4. The junction structure according to claim 1, wherein the groove is at least one of an I-shape, a U-shape, an S-shape, a W-shape, a circular shape, and a spiral shape. . 請求項１〜４のいずれか１つにおいて、前記本体および蓋が銅，銅合金，アルミニウムおよびアルミニウム合金のいずれかからなることを特徴とする接合構造体。  The bonded structure according to any one of claims 1 to 4, wherein the main body and the lid are made of any one of copper, a copper alloy, aluminum, and an aluminum alloy. 請求項１〜５のいずれかに記載の接合構造体において、前記本体に形成された溝が冷媒用の通路であり冷却板として使用されることを特徴とする接合構造体。  The joining structure according to any one of claims 1 to 5, wherein the groove formed in the main body is a passage for a refrigerant and is used as a cooling plate. 請求項１〜５のいずれかに記載の接合構造体において、前記本体に形成された溝が潤滑剤用の通路であることを特徴とする接合構造体。  6. The joined structure according to claim 1, wherein the groove formed in the main body is a passage for a lubricant.
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