JP2010056196A - Liquid-cooled jacket, and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid-cooled jacket which can efficiently cool a heat release object such as a CPU, and to provide a method of manufacturing the same. <P>SOLUTION: In a jacket body 10, a first fluid flow passage 21 and a second fluid flow passage 22 through which a heat transport fluid flows are stacked and arranged with a partition portion 13 interposed along the thickness of the jacket body 10. The first fluid flow passage 21 is sectioned by a first recessed portion 11 and a first sealing body 31 of the jacket body 10, and the first sealing body 31 is joined to the jacket body 10 by moving a rotary tool T along an abutting portion 40 between an opening peripheral edge 14a of the first recessed portion 11 and a peripheral edge 31a of the first sealing body 31 to carry out frictional agitation. The second fluid flow passage 32 is sectioned by a second recessed portion 12 and a second sealing body 32 of the jacket body 10, and the second sealing body 32 is joined with the jacket body 10 by moving the rotary tool T along an abutting portion 40 between an opening peripheral edge 15a of the second recessed portion 12 and a peripheral edge 32a of the second sealing body 32 to carry out frictional agitation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid cooling jacket for cooling a heat generating body such as a CPU and a method for manufacturing the same.

  Electronic devices typified by personal computers tend to increase the amount of heat generated by a mounted CPU (heat generating body) as their performance improves, and cooling of the CPU is becoming increasingly important. Conventionally, air-cooled fan type heat sinks have been used to cool CPUs, but problems such as fan noise and cooling limit in air-cooled systems have come to be highlighted. Jackets (also called water-cooled jackets or liquid-cooled modules) are attracting attention.

With regard to such a technique, for example, Patent Document 1 proposes a liquid cooling jacket in which a recess is formed on the surface of a jacket body, and an opening of the recess is closed with a sealing body to form a heat transport fluid flow path. Yes.
JP 2006-324647 A

  However, in recent years, the number of heat generators such as CPUs has further increased, and the amount of heat generated from them has increased. In the liquid cooling jacket described in Patent Document 1, the contact area between the heat transport fluid and the flow path is insufficient. There is a problem that the CPU or the like may not be efficiently cooled. Furthermore, with the recent miniaturization of computers, it is required to efficiently cool a heat generating body such as a CPU in a narrow space.

  Accordingly, an object of the present invention is to provide a liquid cooling jacket capable of efficiently cooling a heat generating body such as a CPU and a method for manufacturing the same in order to solve the above problems.

  As means for solving the above-mentioned problems, the present invention according to claim 1 is directed to a first fluid channel and a second fluid in which a heat transport fluid that transports heat generated by a heat generator to the outside flows in a jacket body. And the first fluid channel includes a first recess for the first fluid channel formed in the jacket body. And a first sealing body that seals the opening of the first recess, and the first sealing body includes an opening peripheral edge of the first recess and a peripheral edge of the first sealing body. The second tool is joined to the jacket body by moving the rotary tool along the abutting portion and performing frictional stirring, and the second fluid channel is a second fluid channel second channel formed in the jacket body. It is divided by a recess and a second sealing body that seals the opening of the second recess, and the second The stationary body is joined to the jacket body by moving the rotary tool along the abutting portion between the opening peripheral edge of the second recess and the peripheral edge of the second sealing body to perform friction stirring. Is a liquid cooling jacket characterized by

  According to such a liquid cooling jacket, since the two layers of fluid flow paths are arranged in the thickness direction of the jacket body, the contact area between the heat transport fluid and the fluid flow path is widened, and heat exchange is efficiently performed. In addition, a fluid flow path is formed in the vicinity of the front and back surfaces of the jacket body, and even when heat generating bodies are provided on both the front and back surfaces of the liquid cooling jacket, the heat generating body is efficiently cooled. It can be performed. Moreover, since the fluid flow path is formed by sealing the opening of the concave portion with the sealing body, the hermeticity of the fluid flow path is improved.

  The invention according to claim 2 is characterized in that a communication hole for communicating the first fluid channel and the second fluid channel is formed in the partition part. It is a cold jacket.

  According to such a liquid cooling jacket, since the circulation path of the heat transport fluid can be reduced, the cooling device can be simplified, and the initial cost and the running cost can be reduced.

The invention according to claim 3 is characterized in that the first recess is formed to open on the front surface side of the jacket body, and the second recess is formed to open on the back surface side of the jacket body. 3. The liquid cooling jacket according to claim 1, wherein the portion is configured by a part of the jacket main body located between the first concave portion and the second concave portion.
According to such a liquid cooling jacket, the distance between the heat generating body and the fluid flow path can be reduced, and the heat generating body can be efficiently cooled.

  The invention according to claim 4 is characterized in that at least one of the first sealing body and the second sealing body is integrally provided with a plurality of fins extending to the bottom surface side of the respective recesses. The liquid cooling jacket according to any one of claims 1 to 3.

  According to such a liquid cooling jacket, since the contact area between the sealing body and the heat transport fluid is widened, the heat conduction efficiency between the heat transport fluid and the fluid flow path is increased, and the heat generating body is cooled more efficiently. It can be performed.

  The invention according to claim 5 is the liquid cooling according to claim 4, wherein the first sealing body and the second sealing body are made of an extruded shape member made of aluminum or an aluminum alloy. It is a jacket.

  According to such a liquid cooling jacket, even if the first sealing body and the second sealing body have a complicated shape in which a plurality of fins are formed, the extruded shape member is cut at an appropriate length to obtain fins. It is possible to easily manufacture a sealing body having a complicated shape by simply cutting the end portion. In addition, an extruded shape made of aluminum or an aluminum alloy has high dimensional accuracy and is lightweight for its strength.

  In the invention according to claim 6, a partition guide wall that partitions the flow path of the heat transport fluid and guides the flow is formed on at least one of the bottom surface of the first recess and the bottom surface of the second recess. The liquid cooling jacket according to claim 3.

  According to such a liquid cooling jacket, since the contact area between the recess and the heat transport fluid is widened, the heat conduction efficiency between the heat transport fluid and the fluid flow path is increased, and the heat generating body is cooled more efficiently. be able to.

  In the invention according to claim 7, the first recess is formed to open on the surface side of the jacket body, and the second recess is formed to have a step shape opening to the bottom surface of the first recess. 3. The liquid cooling jacket according to claim 1, wherein the partition portion is configured by a second sealing body that seals the opening of the second recess.

  According to such a liquid-cooled jacket, it is possible to process the recesses and friction stir work from the surface side of the jacket body, so only one side of the jacket body needs to be processed, efficient processing can be performed, and construction Reduces labor and construction time.

  The invention according to claim 8 is characterized in that at least one of the first sealing body and the second sealing body is integrally provided with a plurality of fins extending to the bottom surface side of the respective recesses. A liquid cooling jacket according to claim 7.

  According to such a liquid cooling jacket, since the contact area between the sealing body and the heat transport fluid is widened, the heat conduction efficiency between the heat transport fluid and the fluid flow path is increased, and the heat generating body is cooled more efficiently. It can be performed.

  The invention according to claim 9 is the liquid according to claim 8, wherein the first sealing body and the second sealing body are formed of an extruded shape member made of aluminum or an aluminum alloy. It is a cold jacket.

  According to such a liquid cooling jacket, even if the first sealing body and the second sealing body have a complicated shape in which a plurality of fins are formed, the extruded shape member is cut at an appropriate length to obtain fins. It is possible to easily manufacture a sealing body having a complicated shape by simply cutting the end portion. In addition, an extruded shape made of aluminum or an aluminum alloy has high dimensional accuracy and is lightweight for its strength.

  The invention according to claim 10 guides the flow by partitioning the flow path of the heat transport fluid on at least one of the bottom surface of the second recess and the surface of the second sealing body on the first sealing body side. The liquid cooling jacket according to claim 7, wherein a partition guide wall is formed.

  According to such a liquid cooling jacket, the contact area between at least one of the recess and the sealing body and the heat transport fluid is widened, so that the heat conduction efficiency between the heat transport fluid and the fluid flow path is increased, and more efficiently. The heat generating body can be cooled.

  According to an eleventh aspect of the present invention, in the jacket body, the first fluid channel and the second fluid channel through which the heat transport fluid that transports heat generated by the heat generator to the outside flows are in the thickness direction of the jacket body. A method for manufacturing a liquid cooling jacket formed by laminating and arranging a partition portion on a surface of the jacket body, wherein a first recess portion is formed on the surface of the jacket body, and a second recess portion is formed on the back surface of the jacket body. A first sealing body for sealing the opening in the opening of the first recess and the second sealing body for sealing the opening in the opening of the second recess; The sealing body installation step to be installed, and the friction tool is moved by moving the rotary tool along the abutting portion between the opening peripheral edge of the first recess and the peripheral edge of the first sealing body. Move the rotary tool along the abutment between the opening edge and the edge of the second sealing body A liquid cooling jacket manufacturing method which is characterized in that a bonding step of performing friction stir allowed.

  According to such a liquid cooling jacket manufacturing method, since the two layers of fluid flow paths are arranged in the thickness direction of the jacket main body, the contact area between the heat transport fluid and the fluid flow path is widened and efficient. Heat exchange can be performed, and a fluid flow path is formed in the vicinity of the front and back sides of the jacket body. Even when heat generators are provided on both sides of the liquid cooling jacket, heat is generated efficiently. The body can be cooled. Moreover, since the fluid flow path is formed by sealing the opening of the concave portion with the sealing body, the hermeticity of the fluid flow path is improved.

  According to a twelfth aspect of the present invention, there is provided a communication hole forming step of forming a communication hole for communicating the first fluid channel and the second fluid channel in the partition before the sealing body installation step. The method for producing a liquid cooling jacket according to claim 11, further comprising:

  According to such a liquid cooling jacket manufacturing method, it is possible to simplify the cooling device that can reduce the circulation path of the heat transport fluid, and to reduce initial costs and running costs.

  The invention according to claim 13 is characterized in that, in the joining step, the rotary tool is rotated in the same direction as the moving direction with respect to the opening. Is the method.

  According to such a liquid cooling jacket manufacturing method, even if a cavity defect occurs during friction stirring, it will occur in a part separated from the abutting part, and the heat transport fluid leaks to the outside. Since it becomes difficult, the sealing property of a fluid flow path becomes still higher.

  The invention according to claim 14 further comprises a temporary joining step of temporarily joining a part of the abutting portion using a temporary joining rotary tool smaller than the rotating tool before the joining step. It is a manufacturing method of the liquid cooling jacket of any one of Claim 11 thru | or 13.

  According to such a liquid cooling jacket manufacturing method, by temporarily joining the jacket body and the sealing body, the sealing body does not move during the main joining, and the main joining is facilitated. The positioning accuracy of the sealing body is improved. In addition, since the rotary tool for temporary joining is smaller than the rotary tool for main joining, the plasticizing region in temporary joining is covered simply by moving the rotary tool for main joining on the temporary joining portion and friction stirring. The final joining is finished.

  In the invention according to claim 15, the abutting portion has a rectangular annular shape, and in the temporary joining step, one diagonal portion of the abutting portion is provisionally joined first, and then the other diagonal portion is provided respectively. The method for manufacturing a liquid cooling jacket according to claim 14, wherein temporary bonding is performed.

  According to such a liquid cooling jacket manufacturing method, the sealing body can be temporarily joined in a well-balanced manner, and the positioning accuracy of the sealing body with respect to the jacket body is improved.

  In the invention according to claim 16, the abutting portion has a rectangular ring shape, and in the temporary joining step, an intermediate portion of one opposite side of the abutting portion is first temporarily joined, and then an intermediate portion of the other opposite side. The method for manufacturing a liquid cooling jacket according to claim 14, wherein the two are temporarily joined.

  According to such a liquid cooling jacket manufacturing method, the sealing body can be temporarily joined in a well-balanced manner, and the positioning accuracy of the sealing body with respect to the jacket body is improved. Furthermore, since temporary joining is performed linearly, processing becomes easy.

  According to the present invention, it is possible to provide a liquid cooling jacket capable of efficiently cooling a heat generating body such as a CPU.

  Hereinafter, embodiments of the present invention will be described in detail with appropriate reference to the drawings.

(First embodiment)
First, the liquid cooling jacket and the manufacturing method thereof according to the present invention will be described. The liquid cooling jacket is a component of a cooling system mounted on an electronic device such as a personal computer, for example, and is a component that cools a CPU (heat generating body) and the like. The liquid cooling system includes a liquid cooling jacket in which a CPU is mounted at a predetermined position, a radiator (heat dissipating means) that discharges heat transported by cooling water (heat transport fluid) to the outside, and a micro pump (heat transport) that circulates cooling water. Fluid supply means), a reserve tank that absorbs expansion / contraction of cooling water due to temperature change, a flexible tube that connects these, and cooling water that transports heat. As the cooling water, for example, an ethylene glycol antifreeze is used. And if a micropump act | operates, cooling water will circulate through these apparatuses.

  As shown in FIGS. 1 and 2, the liquid cooling jacket 1 includes a first fluid flow path 21 in which a heat transport fluid that transports heat generated by a heat generator (not shown) flows inside the jacket body 10. (Refer FIG. 2) and the 2nd fluid flow path 22 (refer FIG. 2) are laminated | stacked and formed in the thickness direction of the jacket main body 10 on both sides of the partition part 13. As shown in FIG.

  The jacket body 10 is a metal member having a rectangular parallelepiped shape, and a first recess 11 is formed on the front surface 10a side, and a second recess 12 is formed on the back surface 10b side. Such a jacket main body 10 is produced by die casting, casting, forging or the like, for example. The jacket body 10 is formed from aluminum or an aluminum alloy. Thereby, the liquid cooling jacket 1 has been reduced in weight and is easy to handle.

  The first fluid channel 21 includes a first recess 11 for the first fluid channel formed on the surface 10 a side of the jacket body 10 and a first sealing body that seals the opening 14 of the first recess 11. It is divided by 31. The first sealing body 31 includes a rotating tool T (see FIG. 3A) along the abutting portion 40 (see FIG. 3A) between the opening peripheral edge portion 14a of the first recess 11 and the peripheral edge portion 31a of the first sealing body 31. It is joined to the jacket body 10 by moving the friction stir by moving (see FIG. 4). A plasticized region (second plasticized region) 43 (see FIG. 2 and FIG. 3C) is formed in a portion through which the rotary tool T has passed. In the present specification, the “plasticization region” includes both a state in which the rotating tool T is heated by frictional heat and is actually plasticized, and a state in which the rotating tool T passes and returns to room temperature. To do.

  The first concave portion 11 has a square bottom surface, and a stepped portion 16 that is lowered by one step on the bottom surface side of the first concave portion 11 is formed in the opening peripheral edge portion 14a at the upper end. The height difference between the surface 10 a of the jacket body 10 and the stepped portion 16 is equivalent to the thickness dimension of the first sealing body 31. On the step portion 16, the peripheral edge portion 31a of the first sealing body 31 is placed. The width of the stepped portion 16 is preferably set as small as possible in order to secure the volume of the first recess 11 through which the cooling water flows. A through-hole 18 is formed in each of the pair of opposing wall portions 17a and 17a of the peripheral wall 17 of the first recess 11 so that the cooling water flows through the first recess 11. In the present embodiment, the through-hole 18 extends in the opposing direction of the walls 17a and 17a (the wall thickness direction of the wall 17a), has a circular cross section, and is formed at the intermediate portion in the depth direction of the first recess 11. Is formed. In addition, the shape and position of the through-hole 18 are not restricted to this, It can change suitably according to the kind and flow volume of cooling water.

  The first sealing body 31 includes a plate-like lid plate portion 33 having a planar shape having the same shape (square in the present embodiment) as the opening 14 (see FIG. 1) of the first recess 11 of the jacket body 10, and a lid A plurality of fins 34, 34... Provided on one surface (lower surface) of the plate portion 33 are configured.

  The plurality of fins 34, 34... Are arranged parallel to each other and orthogonal to the lid plate portion 33, and are configured integrally with the lid plate portion 33. Thereby, heat is transmitted favorably between the cover plate portion 33 and the fins 34, 34. As shown in FIG. 1, the fins 34, 34... Are along a direction perpendicular to the wall portions 17 a, 17 a of the peripheral wall 17 in which the through holes 18, 18 are formed (a direction along the central axis direction of the through hole 18). Are arranged so as to spread.

  In the present embodiment, the fin 34 has a height (depth) dimension that is slightly shorter than the depth dimension below the step portion 16 of the first recess 11, and the tip (lower end) thereof is the first. A bottom surface of one recess 11 and a slight clearance (dimension of 1 mm or less) are provided (see FIG. 2).

  When the first sealing body 31 is attached to the jacket body 10, a cylindrical space is defined by the cover plate portion 33 of the first sealing body 31, the adjacent fins 34 and 34, and the bottom surface of the first recess 11. The space functions as a flow path 35 (see FIGS. 2 and 3A) through which cooling water flows.

  The fins 34, 34... Have a length dimension (a direction along the central axis direction of the through hole 18) that is shorter than the length dimension of one side of the first recess 11. Both ends of the fin 34 are configured to be spaced apart from the inner wall surfaces of the wall portions 17a and 17a of the peripheral wall 17 of the first recess 11 by a predetermined distance. In this way, when the first sealing body 31 is attached to the jacket body 10, the space between the fins 34, 34... And the wall portion 17 a of the peripheral wall 17 of the first concave portion 11 is the flow path header portion. It will function as 36. The flow path header portion 36 extends from the through hole 18 in a direction orthogonal to the extending direction of the fins 34 (see FIGS. 2 and 3A).

  The first fluid channel 21 is configured by the plurality of channels 35, 35... And the channel header portions 36 and 36. Then, cooling water (heat transport fluid) flows into and out of the first fluid flow path 21 through the through holes 18 and 18.

  The first sealing body 31 is also made of aluminum or an aluminum alloy, like the jacket body 10. Thereby, the liquid cooling jacket 1 has been reduced in weight and is easy to handle. The first sealing body 31 is made of aluminum or an aluminum alloy and is formed by cutting a block. The manufacturing method is not limited to this. For example, a member having a cross-sectional shape including a lid plate portion 33 and a plurality of fins 34, 34... Is formed by extrusion molding or grooving, and the longitudinal direction of the fins 34. You may comprise by removing both ends.

  The second fluid channel 22 includes a second recess 12 for the second fluid channel formed on the back surface 10 b side of the jacket body 10 and a second sealing body that seals the opening 15 of the second recess 12. 32. The second sealing body 32 moves the rotating tool T along the abutting portion (not shown) between the opening peripheral edge portion 15a of the second concave portion 12 and the peripheral edge portion 32a of the second sealing body 32, thereby friction stir. Is joined to the jacket main body 10. A plasticized region (second plasticized region) 43 (see FIG. 2) is formed in a portion through which the rotary tool T has passed.

  The second recessed portion 12 has a shape obtained by inverting the first recessed portion 11, and a stepped portion 16 having the same shape as the stepped portion 16 of the first recessed portion 11 is formed in the opening peripheral edge portion 15 a. In addition, a through hole 18 having the same shape as the through hole 18 on the surface 10a side is formed in each of the pair of wall portions 17a and 17a facing each other of the peripheral wall 17 of the second recess 12.

  The second sealing body 32 has the same shape as the first sealing body 31 and is attached to the jacket body 10 with the first sealing body 31 inverted. The second sealing body 32 includes a plate-like lid plate portion 33 having a planar shape having the same shape (square in the present embodiment) as the opening 15 (see FIG. 1) of the second recess 12 of the jacket body 10, and a lid A plurality of fins 34, 34... Provided on the upper surface of the plate portion 33 are provided. Since the structure of the cover plate part 33 and the fin 34 is the same structure as that of the first sealing body 31, the description thereof is omitted.

  And when this 2nd sealing body 32 is attached to the jacket main body 10, the flow path header part 36 which spreads in the direction orthogonal to the extension direction of the fin 34 in the 2nd recessed part 12 into which the cooling water flows. And are formed.

  The partition 13 is constituted by a part of the jacket body 10 located between the first recess 11 and the second recess 12. That is, the partition 13 has a square shape in plan view and has a flat plate shape with a predetermined thickness, the surface on the front surface 10 a side forms the bottom surface of the first recess 11, and the surface on the back surface 10 b side has the bottom surface of the second recess 12. Is configured.

  According to such a configuration, for example, in each of the first fluid flow path 21 and the second fluid flow path 22, the cooling water (heat transport fluid) flowing from one through hole 18 is flown by the flow path header portion 36. After spreading in each flow path 35 and flowing through the flow path 35, it flows into the other flow path header portion 36. After that, it flows in the direction of the other through hole 18 in the flow path header portion 36 and flows out from the through hole 18.

  Next, a method for manufacturing the liquid cooling jacket 1 having the above-described configuration and a method for fixing the first sealing body 31 to the jacket body 10 by friction stir welding will be described with reference to FIGS. 3 and 4. .

  First, as shown in FIG. 1, in a known processing method such as cutting, the first concave portion 11 is formed on the surface 10 a of the square jacket body 10 having a predetermined thickness in plan view, and then the jacket body 10 The 2nd recessed part 12 is formed in the back surface 10b (recessed part formation process).

  Next, as shown in FIG. 3A, the first sealing body 31 is inserted into the first recess 11 with the fins 34 on the lower side, and the periphery of the first sealing body 31 is inserted. It installs so that the part 31a may be mounted on the level | step-difference part 16 of the opening peripheral part 14a of the 1st recessed part 11 (sealing body installation process). Here, the opening peripheral part 14a of the 1st recessed part 11 of the jacket main body 10 and the peripheral part 31a of the 1st sealing body 31 are faced | matched, and the abutting part 40 is comprised.

  Next, the friction stir is performed by relatively moving the friction stir welding rotary tool T along the abutting portion 40 (joining step). At this time, it is preferable that a jig (not shown) surrounding the jacket body 10 from four directions is applied in advance to the peripheral surface of the peripheral wall 17 of the jacket body 10. According to this, the thickness of the peripheral wall 17 is thin, and the distance (gap) between the outer peripheral surface of the shoulder portion 51 (see FIG. 4) of the rotary tool T and the outer peripheral surface of the peripheral wall 17 is, for example, 2.0 mm or less. Even if it exists, the surrounding wall 17 becomes difficult to deform | transform outside by the pressing force of the rotation tool T. In addition, when the thickness of the surrounding wall 17 is thick, the said jig | tool does not need to be installed.

  The rotary tool T is made of a metal material that is harder than the jacket body 10 and the first sealing body 31, and as shown in FIG. 4, a shoulder portion 51 having a columnar shape and a lower end surface of the shoulder portion 51 are projected. The agitating pin (probe) 52 is provided. What is necessary is just to set the dimension and shape of the rotary tool T according to the material, thickness, etc. of the jacket main body 10 and the 1st sealing body 31 (2nd sealing body 32). The protruding length dimension L1 of the stirring pin 52 is preferably 60% or less of the thickness dimension T1 of the lid plate portion 33 of the first sealing body 31 (in this embodiment, approximately 50%). According to such a configuration, the first sealing body 31 is not easily deformed to the first recess 11 side by friction stir welding, and the volume of the first recess 11 is prevented from being reduced. The rotational speed of the rotary tool T is 500 to 15000 (rpm), the feed speed is 0.05 to 2 (m / min), and the pushing force for pressing the abutting portion 40 is about 1 to 20 (kN). 10 and the first sealing body 31 are appropriately selected according to the material, plate thickness, and shape.

  First, as shown in FIG. 3A, the rotary tool T is inserted into the jacket main body 10. Surface 10a). The rotation tool T is moved while rotating from the insertion position 53 to the abutting portion 40. When the axis of the rotary tool T moves to a portion located on the abutting surface 40a of the abutting portion 40, the rotating tool T is moved so that the shaft core is along the abutting surface 40a. At this time, the rotation direction (spinning direction) of the rotary tool T is set to be the same direction as the moving direction (revolution direction). That is, in this embodiment, since the rotary tool T is moved clockwise with respect to the opening 14 of the first recess 11 (see arrow Y1 in FIG. 3A), the rotary tool T is rotated clockwise. (See arrow Y2 in FIG. 3A). In addition, when moving the rotation tool T counterclockwise with respect to the opening part 14 of the 1st recessed part 11, the rotation tool T will be rotated counterclockwise.

  Thereafter, the rotation and movement of the rotary tool T are continued, and the plasticizing region 41 is formed by making the rotary tool T go around the opening 14 as shown in FIG. At this time, the start end 54a (see FIG. 3A) and the end 54b (see FIG. 3B) in the first round of the rotary tool T overlap, and a part of the plasticized region 41 overlaps. Is configured to do.

  Then, as shown in (c) of FIG. 3, after the movement of the first round of the rotary tool T is finished, the rotary tool T is further rotated once along the plasticizing region 41. In the present embodiment, the rotation and movement of the second turn of the rotary tool T are the same as the rotation direction, rotation speed, movement direction, and movement speed of the first turn (see arrows Y3 and Y4 in FIG. 3). Further, when entering the second round of movement, the rotating tool T is not exchanged and is continuously rotated and moved while being inserted into the abutting portion 40, and the pushing amount is not changed. Note that the rotation speed, movement speed, and the like of the rotary tool T may be changed as appropriate according to the shape and material of the jacket body 10 and the first sealing body 31.

  Here, the rotary tool T forms the plasticized region 41 in the movement of the first round, and further stirs the formed plasticized region 41 in the movement of the second round, thereby reducing the cavity defects existing therein. I am letting. Hereinafter, a region formed after the second movement of the rotary tool T is completed may be referred to as a “second plasticizing region 43”.

  Then, as shown in FIG. 3 (c), when the movement of the second turn of the rotary tool T is completed, the upper surface of the peripheral wall 17 where the rotary tool T is removed from the plasticizing region 43 (butting portion 40). The rotary tool T is pulled out at that position. As described above, the extraction position 55 of the rotary tool T is located outside the abutting portion 40, so that the extraction trace of the stirring pin 52 is not formed in the abutting portion 40. Thereby, the joining property of the jacket main body 10 and the 1st sealing body 31 can further be improved. In addition, you may process a drawing trace flatly, such as filling a weld metal.

  As described above, by rotating the rotating tool T around the opening 14 of the first recess 11 along the abutting portion 40 (see FIG. 3A) and performing friction stir welding, the jacket body The first sealing body 31 is fixed to 10.

  Thereafter, the jacket body 10 is inverted so that the second recess 12 on the back surface 10b side faces upward. And the 2nd sealing body 32 is inserted in the 2nd recessed part 12 so that the fin 34 may become a lower side, and the peripheral part 32a of the 2nd sealing body 32 is the opening peripheral part of the 2nd recessed part 12. It installs so that it may be mounted on the level | step-difference part 16 of 15a. Thereafter, the same operation process as that of the first sealing body 31 described above is performed, and the second sealing body 32 is joined to the jacket body 10 by friction stirring (joining process). A plurality of flow paths 35, 35... (See FIG. 2) formed in this step and flow path header portions 36, 36 (see FIG. 2) constitute the second fluid flow path 22. Cooling water (heat transport fluid) flows into the second fluid flow path 22 through the through holes 18 and 18 formed in the pair of wall portions 17a and 17a facing each other of the peripheral wall 17 of the first recess 11. Leaked.

  In the present embodiment, the friction stir welding is performed by rotating the rotary tool T twice. However, the friction stir welding can be performed only by making one rotation.

  By completing the above steps, the first sealing body 31 and the second sealing body 32 are joined to the jacket body 10 to form the liquid cooling jacket 1.

  According to the liquid cooling jacket 1 and the manufacturing method thereof according to the present embodiment, two layers of fluid flow paths (first fluid flow path 21 and second fluid flow path 22) are arranged in the thickness direction of the jacket body 10. Therefore, the contact area between the heat transport fluid and the fluid flow path is widened. Thereby, heat exchange can be performed efficiently between the heat transport fluid and the liquid cooling jacket 1. Furthermore, fluid flow paths are formed in the vicinity of both surfaces of the front surface 10a and the back surface 10b of the jacket main body 10, and heat generators (not shown) are arranged in contact with the front and back surfaces of the liquid cooling jacket 1, respectively. Even in this case, the heat generating body can be efficiently cooled.

  Moreover, the opening part 14 (15) of the 1st recessed part 11 (2nd recessed part 12) is sealed with the 1st sealing body 31 (2nd sealing body 32), and friction stirring is carried out along the abutting part 40. FIG. Since the first fluid channel 21 (second fluid channel) is formed by joining, the hermeticity of the first fluid channel 21 (second fluid channel) is enhanced.

  Furthermore, the first sealing body 31 and the second sealing body 32 are exposed on both the front surface 10a and the back surface 10b of the jacket main body 10, respectively. Therefore, when the heat generating body is placed in contact with both the front and back surfaces of the liquid cooling jacket 1, the distance between the heat generating body and each of the fluid flow paths 21 and 22 can be reduced, and more efficiently. The heat generating body can be cooled.

  In the present embodiment, since the first sealing body 31 and the second sealing body 32 are integrally provided with a plurality of fins 34, 34. The contact area between 32 and the heat transport fluid is increased. Thereby, the heat transfer efficiency between the heat transport fluid and the first sealing body 31 and the second sealing body 32 is increased, so that the heat generating body can be cooled more efficiently. Further, since the fins 34, 34... And the cover plate portion 33 are integrally formed, heat conductivity is high.

  And since the 1st sealing body 31 and the 2nd sealing body 32 are comprised by the extruded shape material made from aluminum or aluminum alloy, even if it is the complicated shape in which the several fin 34 was formed, The first sealing body 31 and the second sealing body 32 having complicated shapes can be easily manufactured simply by cutting the extruded shape member with an appropriate length and cutting both ends of the fin 34 in the extrusion direction. . In addition, an extruded shape made of aluminum or an aluminum alloy has high dimensional accuracy and is lightweight for its strength.

  Further, in the friction stirrer according to the present embodiment, after the rotating tool T is made to make one round and the plasticized region 41 is formed, the rotating tool T is made to make one more round along the plasticizing region 41, thereby making it more than the plasticizing region 41. Furthermore, the agitated second plasticization region 43 is formed. That is, even when a cavity defect occurs in the plasticized region 41, the defect is automatically repaired, and the cavity defect in the second plasticized region 43 can be greatly reduced. Accordingly, the sealing performance of the joint can be further improved, and the highly reliable liquid cooling jacket 1 can be supplied.

  Further, the second movement of the rotary tool T is continuously performed following the movement of the first round without exchanging the rotary tool T, so that it is possible to suppress an increase in the joining time.

  Further, the start end 54a and the end end 54b in the first round of the rotary tool T overlap, and a part of the plasticized region 41 overlaps, so that the peripheral wall 17 of the jacket body 10 and the first sealing body 31 can be bonded satisfactorily. That is, since the plasticized region 41 reliably covers the entire circumference of the abutting portion 40, the heat transport fluid is less likely to leak to the outside, and the sealing performance of the joint portion can be further improved.

  Further, by rotating the rotary tool T in the same direction as the movement direction around the opening 14 of the first recess 11, even if a cavity defect occurs in the second plasticization region 43, the rotation tool T is more than the butt 40. It will occur in the part closer to the outside. Therefore, since the heat transport fluid in the first recess 11 does not flow through the cavity defect, it becomes difficult to leak to the outside of the first recess 11 and the sealing performance of the joint can be further improved.

  Further, the first sealing body 31 is formed by integrally forming the lid plate portion 33 and the fins 34, 34... So that the rigidity of the lid plate portion 33 is increased. It can prevent that the stationary body 31 deform | transforms. Thereby, the abutting state of the opening peripheral part 14a of the opening part 14 of the 1st recessed part 11 and the peripheral part 31a of the 1st sealing body 31 becomes favorable, and the sealing performance of a junction part can further be improved.

(Second Embodiment)
Next, a liquid cooling jacket and a manufacturing method thereof according to the second embodiment will be described with reference to FIG.

  In this embodiment, as shown in FIG. 5A, prior to the step of forming the plasticized region 41 with the rotary tool T of the first embodiment, the opening 14 of the first recess 11 (see FIG. 1). Temporarily joining a part of the abutting portion 40 between the opening peripheral edge portion 14a (see FIG. 1) and the peripheral edge portion 31a of the first sealing body 31 using a temporary joining rotary tool T2 smaller than the rotary tool T. It is characterized by. In addition, after performing temporary joining, the main joining similar to 1st Embodiment is performed using the rotation tool T (refer FIG.5 (b)).

  The temporary joining rotary tool T2 includes a stirring pin (not shown) having a smaller diameter than the stirring pin 52 of the rotating tool T, and the plasticized region 45 to be formed is formed by the rotating tool T in a later step. It has a width smaller than the width of the plasticized region 41 (see FIG. 5B). As a result, the plasticizing region 45 in the temporary joining is completely covered with the plasticizing region 41, and therefore the trace of the drawing of the temporary joining rotary tool T2 remaining in the plasticizing region 45 and the trace of the plasticizing region 45 are present. Does not remain.

  In the present embodiment, as in the first embodiment, the abutting portion 40 has a square shape (rectangular ring), and in the step of temporarily joining the abutting portion 40 with the temporary joining rotary tool T2, one of the abutting portions 40 is provided. After the diagonals 44a and 44b are temporarily joined together, the other diagonals 44c and 44d are temporarily joined. By temporarily joining in this order, the first sealing body 31 can be temporarily joined to the jacket body 10 in a well-balanced manner, and the positioning accuracy of the first sealing body 31 with respect to the jacket body 10 is improved. The deformation of the one sealing body 31 can be prevented. Moreover, by performing temporary joining of the 1st sealing body 31, the shift | offset | difference of the 1st sealing body 31 at the time of the main joining by the rotary tool T can be prevented, and the sealing performance of a junction part can be improved further. .

  The temporary bonding is also performed on the second sealing body 32. The work process is the same as described above.

(Third embodiment)
Next, a liquid cooling jacket and a manufacturing method thereof according to the third embodiment will be described with reference to FIG.

  In this embodiment, as shown in FIG. 6A, prior to the step of forming the plasticized region 41 with the rotary tool T of the first embodiment, the opening 14 of the first recess 11 (see FIG. 1). Temporarily joining a part of the abutting portion 40 between the opening peripheral edge portion 14a (see FIG. 1) and the peripheral edge portion 31a of the first sealing body 31 using a temporary joining rotary tool T2 smaller than the rotary tool T. It is characterized by. Temporary joining here is performed in a straight line by friction stir welding at the middle part of each side, while the second embodiment is friction stir welding the corners of the square butt 40. ing. Specifically, the abutting portion 40 has a square shape (rectangular ring shape), and in the step of temporarily joining the abutting portion 40 with the temporary joining rotary tool T2, an intermediate portion 46a of one side 46, 46 of the abutting portion 40 is provided. , 46b are temporarily joined together, and then the intermediate portions 47a, 47b of the other opposite sides 47, 47 are temporarily joined. At this time, the plasticized regions 48 formed by the temporary joining rotary tool T2 are linear with the same length.

  In the present embodiment, the first sealing body 31 can be temporarily joined to the jacket main body 10 in a balanced manner by temporarily joining in the order as described above, and the positioning accuracy of the first sealing body 31 with respect to the jacket main body 10 is determined. And the deformation of the first sealing body 31 can be prevented. In addition, since the first sealing body 31 is temporarily joined, the first sealing body 31 can be prevented from being displaced during the main joining by the rotary tool T. Furthermore, according to this embodiment, since the friction stir welding of the temporary bonding is linear, it is only necessary to move the temporary bonding rotary tool T2 linearly and the processing is easy.

(Fourth embodiment)
Next, a liquid cooling jacket according to a fourth embodiment will be described with reference to FIGS.

  As shown in FIGS. 7 and 8, the liquid cooling jacket 60 according to this embodiment includes a first fluid channel 21, a second fluid channel 22, and a partition portion 13 of the liquid cooling jacket 1 according to the first embodiment. A communication hole 61 is formed to communicate the. In the first embodiment, in each of the first concave portion 11 and the second concave portion 12, the pair of wall portions 17a and 17a of the peripheral wall 17 facing each other are provided with the through holes 18 and 18 facing each other. In 4 embodiment, in each peripheral wall 17 of the 1st recessed part 11 and the 2nd recessed part 12, the through-hole 18 is formed only in the wall part 17a located in the same side. That is, two through-holes 18 are formed on the same side surface (only one surface) of the jacket main body 10 so as to be arranged vertically.

  In addition, since structures other than the communication hole 61 and the through-hole 18 in the liquid cooling jacket 60 are equivalent to the liquid cooling jacket 1 of 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The communication hole 61 is formed so as to penetrate from the bottom surface of the first recess 11 to the bottom surface of the second recess 12. The communication hole 61 is formed on the bottom surface of the first concave portion 11 (the bottom surface of the second concave portion 12) located on the opposite side to the wall portion 17a in which the through hole 18 is formed. When the first sealing body 31 and the second sealing body 32 are attached to the jacket main body 10, the flow formed outside both ends of the flow path 35 (see FIG. 8) formed between the adjacent fins 34, 34. A communication hole 61 is formed so as to open to the flow path header portion 36 (see FIG. 8) on the side where the through-hole 18 is not formed among the path header portions 36 and 36. The communication holes 61 are formed in a plurality (three in the present embodiment) at a predetermined interval in the direction in which the flow path header portion 36 spreads (the direction perpendicular to the extending direction of the fins 34). The number of the communication holes 61 may be single.

  According to such a configuration, for example, the cooling water (heat transport fluid) flowing in from the through hole 18 formed on the first fluid channel 21 side spreads to each channel 35 by the one channel header portion 36. Then, after flowing through the flow path 35, it flows into the other flow path header part 36 and flows into the flow path header part 36 of the second fluid flow path 22 through the communication hole 61. After that, after spreading in each flow path 35 of the second fluid flow path 22 and flowing in the flow path 35, it flows into the flow path header portion 36 on the through hole 18 side and flows out from the through hole 18. The flow direction of the cooling water (heat transport fluid) is not limited to the flow direction from the first fluid flow path 21 to the second fluid flow path 22, and may be reversed. .

  The communication hole 61 is a sealing body installation in which the first sealing body 31 is installed in the opening 14 of the first recess 11 after the recess forming step of forming the first recess 11 and the second recess 12 in the jacket body 10. Before the step, the partition 13 is formed using a known cutting tool such as a drill (communication hole forming step).

  According to the liquid cooling jacket 60 having such a configuration, in addition to the same effects as the liquid cooling jacket 1 of the first embodiment, it is possible to reduce the circulation path of the heat transport fluid, thereby simplifying the cooling device. Thus, the effect that the initial cost and the running cost can be reduced can be obtained.

(Fifth embodiment)
Next, a liquid cooling jacket according to a fifth embodiment will be described with reference to FIGS.

  In the liquid cooling jacket 1 of the first embodiment, the flow path 35 in the first fluid flow path 21 and the second fluid flow path 22 is formed by the fins 34 formed in the first seal body 31 and the second seal body 32. In contrast, as shown in FIGS. 9 to 11, the liquid cooling jacket 70 according to the present embodiment is formed on the bottom surface of the first recess 11 and the bottom surface of the second recess 12 with the heat transport fluid. A partition guide wall 71 that partitions the flow path 35 and guides the flow is formed.

  In addition, the partition guide walls 71, 71... Formed on the bottom surface of the first recess 11 and the bottom surface of the second recess 12 in the liquid cooling jacket 70, and other than the first sealing body 31 and the second sealing body 32. Since the configuration is the same as that of the liquid cooling jacket 1 of the first embodiment, the same reference numerals are given and description thereof is omitted.

  As shown in FIGS. 9 to 11, a plurality of partition guide walls 71 are formed in parallel, and are erected so as to be parallel to each other and perpendicular to the bottom surfaces of the first recess 11 and the second recess 12. Yes. The partition guide wall 71 is configured integrally with the bottom surfaces of the first recess 11 and the second recess 12, and heat is transmitted favorably between the jacket body 10 and the partition guide wall 71. The partition guide walls 71, 71... Are spread out along the direction perpendicular to the wall portions 17 a, 17 a of the peripheral wall 17 in which the through holes 18, 18 are formed (the direction along the central axis direction of the through holes 18). Has been.

  The partition guide wall 71 has a height dimension equivalent to the depth dimension from the step part 16 to the bottom part of the first concave part 11 (second concave part 12), and the tip part thereof is the first concave part 11 (second secondary part 11). It is desirable to contact the bottom side surface (bottom surface) of the first sealing body 31 (second sealing body 32) fixed to the recess 12) (see FIG. 11). Thereby, heat is favorably transmitted between the partition guide wall 71 and the first sealing body 31 (second sealing body 32).

  The 1st sealing body 31 (2nd sealing body 32) is formed in flat form, and is exhibiting planar view square. When the first sealing body 31 (second sealing body 32) is attached to the jacket body 10, the first sealing body 31 (second sealing body 32), the adjacent partition guide walls 71, 71, and the first A cylindrical space is defined by the bottom surface of the recess 11 (second recess 12), and the space functions as a flow path 35 (see FIGS. 10 and 11) through which cooling water flows.

  The partition guide walls 71, 71... Have a length dimension (a direction along the central axis direction of the through hole 18) that is shorter than the length dimension of one side of the first recess 11 (second recess 12). Both ends of the partition guide wall 71 are configured to be spaced apart from the inner wall surfaces of the wall portions 17a and 17a of the peripheral wall 17 of the first recess 11 (second recess 12), respectively. If it does in this way, when the 1st sealing body 31 (2nd sealing body 32) is attached to the jacket main body 10, the 1st recessed part 11 (2nd recessed part 12) of the both ends outer side of the division guide walls 71 and 71 ... will be demonstrated. ) Between the peripheral wall 17 and the wall portion 17a functions as the flow path header portion 36 (see FIGS. 10 and 11). The flow path header portion 36 extends from the through hole 18 in a direction orthogonal to the extending direction of the partition guide wall 71 (see FIGS. 10 and 11). The plurality of flow paths 35, 35... And the flow path header portions 36, 36 constitute a first fluid flow path 21 (second fluid flow path 22). And this 1st fluid flow path 21 (2nd fluid flow path 22) is through the through-holes 18 and 18 formed in a pair of wall part 17a, 17a which the surrounding wall 17 of the 1st recessed part 11 mutually opposes. Cooling water (heat transport fluid) flows in and out.

  The partition guide wall 71 is formed at the same time when the first recess 11 (second recess 12) is formed in the jacket body 10 by cutting. That is, the partition guide wall 71 is formed by cutting the first recess 11 (second recess 12) while leaving the partition guide wall 71 using a known cutting tool. The manufacturing method is not limited to this. For example, the partition guide wall 71 may be formed separately and fixed to the bottom surface of the first recess 11 (second recess 12). .

  According to the liquid cooling jacket 70 configured as described above, the contact area between the jacket body 10 and the heat transport fluid is widened, so that the heat between the heat transport fluid and the first fluid channel 21 and the second fluid channel 22 is increased. The conduction efficiency is increased. As a result, the heat generating body can be cooled more efficiently. In addition, according to the liquid cooling jacket 70, the same operational effects as in the first embodiment can be obtained.

  In the present embodiment, the first fluid channel 21 and the second fluid channel 22 are formed independently of each other. However, the present invention is not limited to this, as in the fourth embodiment. A communication hole (not shown) may be formed in the partition 13 (a part of the jacket body 10 located between the first recess 11 and the second recess 12).

(Sixth embodiment)
Next, a liquid cooling jacket according to a sixth embodiment will be described with reference to FIGS.

  In the liquid cooling jacket 1 of the first embodiment, recesses (first recess 11 and second recess 12) are formed on both sides of the front surface 10a and the back surface 10b of the jacket main body 10, respectively, and a sealing body (first While the sealing body 31 and the second sealing body 32) are fixed to form the first fluid channel 21 and the second fluid channel 22, the liquid cooling jacket 80 according to this embodiment As shown in FIGS. 12 to 14, both the first recess 81 and the second recess 82 are formed on one side (surface 10 a) of the jacket body 10. Specifically, the first recess 81 is formed to open on the surface 10 a side of the jacket body 10, and the second recess 82 is formed to open on the bottom surface of the first recess 81. That is, a second recess 82 is formed in a step shape in the back (lower part) of the first recess 81. The opening 84 of the second recess 82 is sealed with the second sealing body 92 to form the second fluid channel 102 (see FIG. 13), and the opening 14 of the first recess 81 above the The first fluid channel 101 (see FIG. 13) is formed by being sealed with one sealing body 91.

  The first recessed portion 81 has a square shape in plan view, and a stepped portion 16 that is lowered by one step on the bottom surface side of the first recessed portion 81 is formed in the opening peripheral edge portion 14 a at the upper end. The height difference between the surface 10 a of the jacket body 10 and the stepped portion 16 is equivalent to the thickness dimension of the first sealing body 31. On the step portion 16, the peripheral edge portion 91a of the first sealing body 91 is placed. The width of the stepped portion 16 is preferably set as small as possible in order to secure the volume of the first recess 11 through which the cooling water flows.

  Through holes 18 and 18 are formed in the peripheral wall 17 of the first recess 81. The through-hole 18 is for flowing cooling water through the first recess 81, and is formed in a pair of wall portions 17a and 17a facing each other. In the present embodiment, the through holes 18 and 18 extend in the opposing direction of the wall portions 17a and 17a (the wall thickness direction of the wall portion 17a), have a circular cross section, and are intermediate in the depth direction of the first recess 81. It is formed in the part. In addition, the shape and position of the through-hole 18 are not restricted to this, It can change suitably according to the kind and flow volume of cooling water.

  The second recess 82 is formed by further cutting the bottom surface of the first recess 81, and the bottom surface of the first recess 81 is a rectangular frame-shaped bottom surface extending inward from the inner peripheral wall of the first recess 81 with a predetermined width. The peripheral edge 83 is opened. The width of the bottom peripheral edge 83 is such that when the second sealing body 92 is installed in the opening 84 of the second recess 82, the opening peripheral edge 84 a of the second recess 82 and the peripheral edge 92 a of the second sealing body 92. Rotation tool T (see FIG. 4) can be moved along the abutting portion 49a (see FIG. 14), that is, the radius of shoulder 51 (see FIG. 4) of rotating tool T is necessary for rotation. It is the dimension which added a certain clearance.

  The second concave portion 82 has a square prism shape that is smaller inward than the bottom surface of the first concave portion 81 by a width dimension of the bottom peripheral edge portion 83 in plan view. A stepped portion 86 that is stepped down to the bottom surface side of the second recessed portion 82 is formed on the opening peripheral portion 84 a that is the periphery of the opening 84 at the upper end of the second recessed portion 82 (located on the bottom surface of the first recessed portion 81). Is formed. The stepped portion 86 has a step having the same dimension as the thickness of the second sealing body 92. On the stepped portion 86 lowered by one step, the peripheral portion 92a of the second sealing body 92 is placed. The width of the stepped portion 86 is preferably set as small as possible in order to secure the volume of the second recess 82 through which the cooling water flows.

  Through holes 18 and 18 for circulating cooling water through the second recess 82 are formed in the lower portions of the pair of wall portions 17a and 17a facing each other of the peripheral wall 17 of the second recess 82, respectively. In the present embodiment, the through holes 18 and 18 are arranged in parallel to the through holes 18 and 18 that open in the first recess 81 (extend in the opposing direction of the wall portions 17a and 17a). The through hole 18 opening in the second recess 82 has a circular cross section similar to that of the through hole 18 opening in the first recess 81, and is formed in the intermediate portion in the depth direction of the second recess 82.

  The second sealing body 92 includes a plate-like lid plate portion 95 having a planar shape having the same shape (square in the present embodiment) as the opening 84 (see FIG. 12) of the second recess 82 of the jacket body 10, and a lid A plurality of fins 96, 96... Provided on the lower surface of the plate portion 95.

  The plurality of fins 96, 96... Are arranged in parallel to each other and orthogonal to the lid plate portion 95, and are configured integrally with the lid plate portion 95. 12 and 13, the fins 96, 96... Are perpendicular to the wall portions 17 a, 17 a of the peripheral wall 17 in which the through holes 18, 18 are formed (directions along the central axis direction of the through holes 18). ) Are spread out along the line. Further, the fin 96 has a height (depth) dimension equivalent to the depth dimension below the stepped portion 86 of the second recess 82, and the tip thereof is in contact with the bottom surface of the second recess 82. It is desirable. Thereby, heat is transferred favorably between the bottom surface of the second recess 82 and the fins 96, 96.

  When the second sealing body 92 is attached to the jacket main body 10, a cylindrical space is defined by the cover plate portion 95 of the second sealing body 92, the adjacent fins 96 and 96, and the bottom surface of the second recess 82. The space functions as a flow path 105 (see FIG. 13) through which cooling water flows.

  The fins 96, 96... Have a length dimension (direction along the direction of the central axis of the through hole 18) that is shorter than the length dimension of one side of the second recess 82. The peripheral wall 17 is configured to be spaced apart from the inner wall surfaces of the wall portions 17a and 17a by a predetermined distance. In this way, when the second sealing body 92 is attached to the jacket main body 10, the space between the outer ends of the fins 96, 96... And the wall portion 17 a of the peripheral wall 17 of the second recess 82 flows. It will function as the road header section 106. The flow path header portion 106 extends from the through hole 18 in a direction orthogonal to the extending direction of the fins 96 (see FIG. 13). The plurality of flow paths 105, 105... And the flow path header portions 106, 106 constitute a second fluid flow path 102. Then, cooling water (heat transport fluid) flows into and out of the second fluid channel 102 through the through holes 18 and 18.

  The first sealing body 91 includes a plate-like lid plate portion 93 having a planar shape having the same shape (square in this embodiment) as the opening 14 (see FIG. 12) of the first recess 81 of the jacket body 10, and a lid A plurality of fins 94, 94... Provided on the lower surface of the plate portion 93.

  The lid plate portion 93 of the first sealing body 91 is slightly larger than the lid plate portion 95 of the second sealing body 92 (difference between the opening 14 of the first recess 81 and the opening 84 of the second recess 82). Is formed. The plurality of fins 94, 94... Are arranged parallel to each other and orthogonal to the lid plate portion 93, and are configured integrally with the lid plate portion 93. 12, the fins 94, 94... Are along a direction perpendicular to the wall portions 17a, 17a of the peripheral wall 17 in which the through holes 18, 18 are formed (a direction along the central axis direction of the through hole 18). Are arranged so as to spread.

  The fin 94 has a height (depth) dimension slightly shorter than the depth dimension from the step portion 16 of the first recess 81 to the bottom peripheral edge portion 83 (the surface of the second sealing body 92). The tip portion is provided with a bottom surface of the first recess 81 (surface of the second sealing body 92) and a slight clearance (dimension of 1 mm or less).

  When the first sealing body 91 is attached to the jacket body 10, the lid plate portion 93 of the first sealing body 91, the adjacent fins 94, 94, and the surface of the lid plate portion 95 of the second sealing body 92. A cylindrical space is defined, and the space functions as a flow path 103 (see FIG. 13) through which cooling water flows. The fins 94, 94... Have a length dimension (a direction along the central axis direction of the through hole 18) shorter than the length dimension of one side of the first recess 81, The inner wall surface of each wall part 17a of the peripheral wall 17 of the recessed part 81 is comprised so that a predetermined space | interval may be spaced apart, respectively.

  Thereby, when the first sealing body 91 is attached to the jacket main body 10, the space between the end portions of the fins 94, 94... And the wall portion 17 a of the peripheral wall 17 of the first recess 11 is formed from the through hole 18. The flow path header portion 104 (see FIG. 13) that extends in a direction orthogonal to the extending direction of the fins 94 is configured. The plurality of flow paths 103, 103... And the flow path headers 104, 104 constitute a first fluid flow path 101 (see FIG. 13). And in this 1st fluid flow path 101, cooling water (heat transport fluid) is through the through-holes 18 and 18 formed in a pair of wall part 17a, 17a which the surrounding wall 17 of the 1st recessed part 81 mutually opposes. Inflow and outflow.

  The first sealing body 91 and the second sealing body 92 are made of aluminum or an aluminum alloy, like the jacket body 10. As a result, the liquid cooling jacket 80 is lighter and easier to handle. The first sealing body 91 and the second sealing body 92 are made of aluminum or an aluminum alloy and are formed by cutting a block. Further, the manufacturing method is not limited to this. For example, a member having a cross-sectional shape including a lid plate portion 93 (95) and a plurality of fins 94, 94 (96, 96). The fin 94 (96) 34 may be formed by removing both ends in the longitudinal direction.

  In this embodiment, the first fluid channel 101 and the second fluid channel 102 are partitioned by the second sealing body 92, and the second sealing body 92 constitutes the partition portion 107.

  Next, a manufacturing method of the liquid cooling jacket 80 having the above-described configuration and a method of fixing the second sealing body 92 and the first sealing body 91 to the jacket body 10 by friction stir welding are mainly shown in FIG. Will be described with reference to FIG.

  First, as shown in FIG. 12, in a known processing method such as cutting, a first concave portion 81 is formed on the surface 10a of the square jacket body 10 having a predetermined thickness in plan view, and thereafter or simultaneously, A second recess 82 is formed at the bottom of the recess 81 (recess forming step).

  Next, the second sealing body 92 is inserted into the second recess 82 from the surface 10a side of the jacket body 10 with the fins 96 on the lower side. And the 2nd sealing body 92 is installed so that the peripheral part 92a of the 2nd sealing body 92 may be mounted on the level | step-difference part 86 of the opening peripheral part 84a of the 2nd recessed part 82 (sealing body installation process) ). Here, the opening peripheral part 84a of the second recessed part 82 of the jacket main body 10 and the peripheral part 92a of the 2nd sealing body 92 are faced | matched, and the abutting part 49a (refer FIG. 14) is comprised.

  Next, as shown in FIG. 14A, friction stir is performed by relatively moving the rotary tool T for friction stir welding along the abutting portion 49a (joining step). At this time, the rotation tool T is the same as that used in the first embodiment.

  First, the rotary tool T is inserted into the jacket main body 10. As shown in FIG. 14A, the insertion position 110 of the rotary tool T is such that the inner peripheral wall of the first recess 81 is close to the abutting portion 49a. Therefore, it is on the abutting part 49a. Then, the rotary tool T is moved so that the axis is along the abutting portion 49a. At this time, the rotation direction (spinning direction) of the rotary tool T is set to be the same direction as the moving direction (revolution direction). That is, in the present embodiment, the rotary tool T is moved clockwise with respect to the opening 84 (see FIG. 12) of the second recess 82 (see arrow Y5 in FIG. 14A). The tool T is rotated right (see arrow Y6 in FIG. 14A). When the rotary tool T is moved counterclockwise with respect to the opening 84 (see FIG. 12) of the second recess 82, the rotary tool T is rotated counterclockwise.

  Thereafter, the rotation and movement of the rotary tool T are continued, and the plastic tool region 41 is formed by making the rotary tool T go around the opening 14. When the movement of the rotary tool T is finished, the rotary tool T is pulled out. The extraction position 111 overlaps with the insertion position 110 and is configured such that a part of the plasticizing region 41 overlaps. In addition, you may process the extraction trace of the rotation tool T so that it may become flat, for example, by burying a weld metal.

  As described above, the rotary tool T is moved around the opening portion 84 (see FIG. 12) of the second recess 82 (see FIG. 12) along the abutting portion 49a to perform the friction stir welding, whereby the jacket is obtained. The second sealing body 92 is fixed to the main body 10.

  Thereafter, the first sealing body 91 is inserted into the first recess 81 (see FIG. 14A) from the surface 10a side of the jacket body 10 with the fin 94 (see FIG. 12) on the lower side. To do. And the peripheral part 91a (refer FIG. 12) of the 1st sealing body 91 is the level | step-difference part 16 (FIG. 12 and FIG. 14) of the opening peripheral part 14a (refer FIG. 12 and FIG. 14 (a)) of the 1st recessed part 81. The first sealing body 91 is installed so as to be placed on (see (a)) (sealing body installation step). Here, the opening peripheral part 14a of the 1st recessed part 81 of the jacket main body 10 and the peripheral part 91a of the 1st sealing body 91 are faced | matched, and the abutting part 49b (refer FIG.14 (b)) is comprised.

  First, the rotary tool T is inserted into the jacket main body 10. As shown in FIG. 14B, the insertion position 112 of the rotary tool T is the upper surface of the peripheral wall 17 that is outside the abutting portion 49b. . The rotation tool T is moved while rotating from the insertion position 112 to the abutting portion 49b. When the axis of the rotating tool T moves to a portion located on the abutting portion 49b, the rotating tool T is moved so that the shaft core follows the abutting portion 49a. At this time, the rotation direction (spinning direction) of the rotary tool T is set to be the same direction as the moving direction (revolution direction). That is, in this embodiment, since the rotary tool T is moved clockwise with respect to the opening 14 of the first recess 81 (see arrow Y7 in FIG. 14B), the rotary tool T is rotated clockwise. (See arrow Y8 in FIG. 14B). When the rotary tool T is moved counterclockwise with respect to the opening 14 of the first recess 81, the rotary tool T is rotated counterclockwise.

  Thereafter, the rotation and movement of the rotary tool T are continued, and the plasticizing region 41 is formed by making the rotary tool T go around the opening 14 as shown in FIG. At this time, the start end 114a and the end end 114b of the rotary tool T are overlapped, and a part of the plasticizing region 41 is configured to overlap.

  When the movement of the rotary tool T is completed, the rotary tool T is moved to the upper surface of the peripheral wall 17 that is outside the plasticizing region 41 (butting portion 49b), and the rotary tool T is pulled out at that position. As described above, the extraction position 113 of the rotary tool T is located outside the abutting portion 49b, so that the extraction trace of the stirring pin 52 is not formed in the abutting portion 49b. Thereby, the joining property of the jacket main body 10 and the 1st sealing body 91 can further be improved. In addition, you may process a drawing trace flatly, such as filling a weld metal.

  As described above, the first sealing body 91 is fixed to the jacket body 10 by performing the friction stir welding by moving the rotary tool T around the opening 14 of the first recess 81 along the abutting portion 49b. Is done.

  In this embodiment, the rotary tool T is rotated once to perform friction stir welding, but it is needless to say that the rotation tool T may be rotated twice as in the first embodiment. According to this, the bondability between the jacket main body 10 and the first sealing body 91 and the second sealing body 92 can be further improved.

  By completing the above steps, the first sealing body 91 and the second sealing body 92 are joined to the jacket main body 10, and the liquid cooling jacket 80 is formed.

  According to the liquid cooling jacket 80 configured as described above, the first recess 81 and the second recess 82 are processed from the surface 10a side of the jacket body 10 and the friction stirring operation (the first sealing body 91 and the second sealing member). The body 92 can be joined). Therefore, it is sufficient to process only one side of the jacket main body 10 and it is not necessary to invert it. Therefore, efficient processing can be performed, and construction labor and time can be reduced.

  Also in the liquid cooling jacket 80, the first fluid channel 101 and the second fluid channel 102 are formed in the vicinity of both the front surface 10 a and the back surface 10 b of the jacket body 10. Even when heat generating bodies (not shown) are arranged in contact with both surfaces, the heat generating bodies can be efficiently cooled.

  In addition, according to the liquid cooling jacket 80, the same effects as those of the first embodiment can be obtained.

  In the present embodiment, the first fluid channel 101 and the second fluid channel 102 are formed independently of each other. However, the present invention is not limited to this, as in the fourth embodiment. You may make it form a communicating hole (not shown) in the partition part 107 (the cover-plate part 95 of the 2nd sealing body 92).

  Further, in the present embodiment, fins 94 and 96 are formed in the first fluid channel 101 and the second fluid channel 102, respectively, and the channels 103 and 105 are partitioned, but the present invention is not limited to this. Instead, a partition guide wall that partitions the second fluid flow path 102 may be provided on the bottom surface of the second recess 82.

(Seventh embodiment)
Next, a liquid cooling jacket according to a seventh embodiment will be described with reference to FIGS. 15 to 18.

  As shown in FIGS. 15 to 18, the liquid cooling jacket 90 according to the present embodiment has both the first concave portion 121 and the second concave portion 122 formed on one side (surface 10 a) side of the jacket body 10. At least one of the bottom surface of the second recess 122 and the surface of the second sealing body 132 on the side of the first sealing body 131 (both in the present embodiment), a heat transport fluid channel (the first fluid channel 151 and the first sealing channel). A partition guide wall 153 for partitioning the two-fluid flow path 152) and guiding the flow is formed.

  As shown in FIG. 15, the 1st recessed part 121 is formed in the surface 10a of the jacket main body 10, and the bottom face is exhibiting square prism shape with a square. A stepped portion 124 is formed at the opening peripheral edge 123 a of the opening 123 at the upper end of the first recess 121, which is lowered by one step on the bottom surface side of the first recess 121. The step portion 124 has a step having the same dimension as the thickness of the first sealing body 131. On the stepped portion 124 lowered by one step, the peripheral portion 131a of the first sealing body 131 is placed.

  As shown in FIG. 17A, the second recess 122 is configured by a flow channel 125 formed on the bottom surface of the first recess 121 and a partition guide wall 153 formed around the channel groove 125. The channel groove 125 is formed on the bottom surface of the first recess 121 by meandering so as to repeat an S shape from the vicinity of one corner to the vicinity of another corner located on a diagonal line by a known cutting process. The second fluid channel 152 is defined by the channel groove 125 and the bottom surface of the second sealing body 132. The surrounding portion (excluding the bottom) remaining when the flow channel 125 is formed constitutes a partition guide wall 153 that partitions the flow channel 125 and guides the cooling water (heat transport fluid).

  A through hole 18 is formed in the peripheral wall 126 of the second recess 122 located at one end of the flow channel 125 to allow cooling water to flow through the second fluid flow channel 152. In the present embodiment, the through hole 18 has a circular cross section and is formed in the intermediate portion in the depth direction of the flow channel groove 125. In addition, the shape and position of the through-hole 18 are not restricted to this, It can change suitably according to the kind and flow volume of cooling water.

  The first sealing body 131 is formed in a flat plate shape and has a square shape in plan view. The square has a side length that is the same length as one side of the opening peripheral edge 123 a of the first recess 121.

  The second sealing body 132 has a planar shape equivalent to the inner peripheral shape of the step portion 124 of the first recess 121, and has a thickness equivalent to the depth from the step portion 124 to the bottom surface of the first recess 121. A flow channel 127 is formed on the surface of the body on the first sealing body 131 side. The first fluid channel 151 is defined by the channel groove 127 and the bottom surface of the first sealing body 131. The surrounding portion (excluding the bottom) remaining when the flow channel 127 is formed constitutes a partition guide wall 154 that partitions the flow channel 127 and guides cooling water (heat transport fluid). The channel groove 127 is formed by meandering and extending so as to repeat an S-shape from the vicinity of one corner of the second sealing body 132 to the vicinity of another corner positioned diagonally, and the path is When mounted on the jacket main body 10, it is formed so as to substantially overlap the flow path groove 125 in plan view. The partition guide wall 154 located at one end of the flow channel 127 on the same side as the side where the through hole 18 of the flow channel 125 is formed has a through hole 133 for circulating cooling water through the flow channel 125. Is formed. A communication hole 134 that allows the first fluid channel 151 and the second fluid channel 152 to communicate with each other is formed on the bottom surface located at the other end of the channel groove 127 opposite to the side where the through hole 133 is formed. Is formed. The through hole 133 and the communication hole 134 are formed by drilling using a known cutting tool such as a drill.

  A through hole 18 is formed in the peripheral wall 126 of the first recess 121 to allow cooling water to flow through the first fluid channel 151. The through hole 18 is formed at a position continuous with the through hole 133 when the second sealing body 132 is inserted into the first recess 121. In the present embodiment, the through hole 18 has a circular cross section and is formed in the intermediate portion in the depth direction of the flow channel 127. In addition, the shape and position of the through-hole 18 are not restricted to this, It can change suitably according to the kind and flow volume of cooling water. The through holes 18 and 18 communicating with the first fluid channel 151 and the second fluid channel 152 are formed by drilling using a known cutting tool such as a drill.

  In such an embodiment, the first fluid channel 151 and the second fluid channel 152 are partitioned at the bottom surface of the second sealing body 132, and the second sealing body 92 constitutes the partition portion 155. Yes.

  According to such a configuration, for example, cooling water (heat transport fluid) flowing from the upper through-hole 18 formed on the first fluid flow path 151 side is passed through the through-hole formed in the second sealing body 132. 133 and flows into one end of the first fluid flow path 151. Then, the cooling water (heat transport fluid) flows to the other end of the first fluid channel 151, flows through the communication hole 134, and flows into the other end of the second fluid channel 152. Thereafter, the cooling water (heat transport fluid) flows to one end side of the second fluid flow path 152 and then flows out from the lower through hole 18. The flow direction of the cooling water (heat transport fluid) is not limited to the flow direction from the first fluid flow path 151 to the second fluid flow path 152, and may of course be reversed. .

  Next, a manufacturing method of the liquid cooling jacket 90 having the above-described configuration and a method of fixing the second sealing body 132 and the first sealing body 131 to the jacket body 10 by friction stir welding are mainly shown in FIG. Will be described with reference to FIG.

  First, as shown in FIG. 15 and FIG. 17 (a), in a known processing method such as cutting, a first recess 121 is formed on the surface 10a of the square jacket body 10 having a predetermined thickness in plan view. Then, the flow channel 125 is formed in the bottom of the first recess 121 (recess forming step). The flow path groove 125 and the surrounding partition guide wall 153 constitute a second recess 122.

  Next, as shown in FIG. 17B, the second sealing body 132 in which the flow channel 127, the through-hole 133 and the communication hole 134 are formed in advance is arranged so that the flow channel 127 is on the upper side. Then, it inserts into the 1st recessed part 121 from the surface 10a side of the jacket main body 10 (sealing body installation process). Here, the inner peripheral edge 124a (see FIG. 15) of the stepped portion 124 of the first recess 121 and the peripheral edge 132a (see FIG. 15) of the second sealing body 132 are abutted to form an abutting portion 156a. .

  Next, friction stir is performed by relatively moving the rotary tool T for friction stir welding along the abutting portion 156a (joining step). At this time, the rotation tool T is the same as that used in the first embodiment.

  First, the rotation tool T is inserted into the insertion position 160 on the abutting portion 156a. Then, the rotary tool T is moved so that the axis is along the abutting portion 156a. At this time, the rotation direction (spinning direction) of the rotary tool T is set to be the same direction as the moving direction (revolution direction). Thereafter, the rotation and movement of the rotary tool T is continued, and the plastic tool region 41 is formed by making the rotary tool T go around the inner peripheral edge 124 a of the stepped portion 124. When the movement of the rotary tool T is finished, the rotary tool T is pulled out. The drawing position 161 overlaps with the insertion position 160 and is configured so that a part of the plasticizing region 41 overlaps. In addition, you may process the extraction trace of the rotation tool T so that it may become flat, for example, by burying a weld metal.

  As described above, the second sealing body 132 is attached to the jacket body 10 by moving the rotary tool T around the inner peripheral edge 124a of the stepped portion 124 along the abutting portion 156a and performing friction stir welding. Fixed.

  Thereafter, as shown in FIG. 18, the first sealing body 131 is placed on the stepped portion 124 of the first recess 121 and the second sealing body 132 from the surface 10a side of the jacket body 10 (sealing). Body installation process). Here, the opening peripheral part 123a of the 1st recessed part 121 of the jacket main body 10 and the peripheral part 131a of the 1st sealing body 131 are faced | matched, and the abutting part 156b (refer FIG. 18) is comprised.

  First, the rotary tool T is inserted into the jacket main body 10. As shown in FIG. 18, the insertion position 162 of the rotary tool T is the upper surface of the peripheral wall 126 (surface 10 a of the jacket main body 10) deviated outward from the abutting portion 156 b. It has become. The rotation tool T is moved while rotating from the insertion position 162 to the abutting portion 156b. When the axis of the rotary tool T is moved to a portion located on the abutting portion 156b, the rotating tool T is moved so that the axis is along the abutting portion 156a. At this time, the rotation direction (spinning direction) of the rotary tool T is set to be the same direction as the moving direction (revolution direction). Thereafter, the rotation and movement of the rotary tool T is continued, and the plastic tool region 41 is formed by making the rotary tool T go around the opening 123. At this time, the start end 164a and the end end 164b of the rotary tool T overlap each other, and a part of the plasticizing region 41 is configured to overlap.

  When the movement of the rotary tool T is completed, the rotary tool T is moved to the upper surface of the peripheral wall 126 that is outside the plasticizing region 41 (butting portion 156b), and the rotary tool T is pulled out at that position. As described above, the extraction position 163 of the rotary tool T is located outside the abutting portion 156b, so that the extraction trace of the stirring pin 52 is not formed in the abutting portion 156b. Thereby, the joining property of the jacket main body 10 and the 1st sealing body 131 can further be improved. In addition, you may process a drawing trace flatly, such as filling a weld metal.

As described above, the first sealing body 131 is fixed to the jacket body 10 by performing the friction stir welding by moving the rotary tool T around the opening 123 of the first recess 121 along the abutting portion 156b. Is done.
By completing the above steps, the first sealing body 131 and the second sealing body 132 are joined to the jacket main body 10, and the liquid cooling jacket 90 is formed.

  According to the liquid cooling jacket 90 configured as described above, the first concave portion 81 and the second concave portion 82 are processed from the surface 10a side of the jacket main body 10 and the friction stirring operation (the first sealing body 91 and the second sealing member). The body 92 can be joined). Therefore, it is sufficient to process only one side of the jacket main body 10 and it is not necessary to invert it. Therefore, efficient processing can be performed, and construction labor and time can be reduced.

  Also in the liquid cooling jacket 90, the first fluid channel 151 and the second fluid channel 152 are formed in the vicinity of both the front surface 10 a and the back surface 10 b of the jacket body 10, and the front and back surfaces of the liquid cooling jacket 90 are formed. Even when heat generating bodies (not shown) are arranged in contact with both surfaces, the heat generating bodies can be efficiently cooled.

  In addition, according to the liquid cooling jacket 90, the same operational effects as those of the first embodiment can be obtained.

  In the present embodiment, the first fluid channel 151 and the second fluid channel 152 are formed to communicate with each other through the communication hole 134. However, the present invention is not limited to this, and the first fluid channel Through holes may be formed at both ends of the channel 151 and the second fluid channel 152, and may be formed independently.

It is a disassembled perspective view of the liquid cooling jacket which concerns on 1st Embodiment. It is sectional drawing of the liquid cooling jacket which concerns on 1st Embodiment. (A)-(c) is the top view which showed the friction stirring process of the liquid cooling jacket which concerns on 1st Embodiment. It is sectional drawing which showed the friction stirring process of the liquid cooling jacket which concerns on 1st Embodiment. (A), (b) is the top view which showed the friction stirring process of the liquid cooling jacket which concerns on 2nd Embodiment. (A), (b) is the top view which showed the friction stirring process of the liquid cooling jacket which concerns on 3rd Embodiment. It is a disassembled perspective view of the liquid cooling jacket which concerns on 4th Embodiment. It is sectional drawing of the liquid cooling jacket which concerns on 4th Embodiment. It is a disassembled perspective view of the liquid cooling jacket which concerns on 5th Embodiment. It is the top view which showed the jacket main body of the liquid cooling jacket which concerns on 5th Embodiment. It is sectional drawing of the liquid cooling jacket which concerns on 5th Embodiment. It is a disassembled perspective view of the liquid cooling jacket which concerns on 6th Embodiment. It is sectional drawing of the liquid cooling jacket which concerns on 6th Embodiment. (A), (b) is the top view which showed the friction stirring process of the liquid cooling jacket which concerns on 6th Embodiment. It is a disassembled perspective view of the liquid cooling jacket which concerns on 7th Embodiment. It is sectional drawing of the liquid cooling jacket which concerns on 7th Embodiment. (A), (b) is the top view which showed the friction stirring process of the liquid cooling jacket which concerns on 7th Embodiment. It is a top view of the liquid cooling jacket which concerns on 7th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid cooling jacket 10 Jacket body 10a Front surface 10b Back surface 11 1st recessed part 12 2nd recessed part 13 Partition part 14 Opening part 14a Opening peripheral part 15 Opening part 15a Opening peripheral part 21 1st fluid flow path 22 2nd fluid flow path 31 1st One sealing body 31a Peripheral part 32 Second sealing body 32a Peripheral part 40 Abutting part 60 Liquid cooling jacket 61 Communication hole 70 Liquid cooling jacket 71 Partition guide wall 80 Liquid cooling jacket 81 First concave part 82 Second concave part 84 Opening part 84a Opening peripheral edge 90 Liquid cooling jacket 91 First sealing body 91a Peripheral part 92 Second sealing body 92a Peripheral part 101 First fluid flow path 102 First fluid flow path 121 First concave part 122 Second concave part 123 Opening part 123a Opening Peripheral part 131 1st sealing body 131a Peripheral part 132 2nd sealing body 132a Peripheral part 134 Communication hole 151 1st Body passage 152 partition the guide wall 155 partitioning portion first fluid flow path 153 partitioning guide wall 154 156a butting portion 156b butting portion

Claims (16)

In the jacket body, a first fluid channel and a second fluid channel through which a heat transport fluid that transports heat generated by the heat generating body flows to the outside are stacked with a partition in the thickness direction of the jacket body Being formed,
The first fluid channel is partitioned by a first recess for the first fluid channel formed in the jacket body and a first sealing body that seals the opening of the first recess,
The first sealing body is joined to the jacket body by moving the rotary tool along the abutting portion between the opening peripheral edge of the first recess and the peripheral edge of the first sealing body to perform friction stirring. Has been
The second fluid channel is partitioned by a second recess for the second fluid channel formed in the jacket body and a second sealing body that seals the opening of the second recess,
The second sealing body is joined to the jacket body by moving the rotating tool along the abutting portion between the opening peripheral edge of the second recess and the peripheral edge of the second sealing body to perform friction stirring. A liquid-cooled jacket characterized by The liquid cooling jacket according to claim 1, wherein a communication hole for communicating the first fluid channel and the second fluid channel is formed in the partition part. The first recess is formed to open on the surface side of the jacket body,
The second recess is formed to open on the back side of the jacket body,
The liquid cooling jacket according to claim 1 or 2, wherein the partition portion is configured by a part of the jacket body located between the first recess and the second recess. The plurality of fins extending toward the bottom surface of each of the recesses are integrally provided on at least one of the first sealing body and the second sealing body. The liquid cooling jacket according to any one of the above. The liquid cooling jacket according to claim 4, wherein the first sealing body and the second sealing body are made of an extruded shape made of aluminum or an aluminum alloy. The partition guide wall which partitions the flow path of the heat transport fluid and guides the flow is formed on at least one of the bottom surface of the first recess and the bottom surface of the second recess. The liquid cooling jacket as described. The first recess is formed to open on the surface side of the jacket body,
The second recess is formed in a stepped shape opening to the bottom surface of the first recess.
The liquid cooling jacket according to claim 1, wherein the partition portion is configured by a second sealing body that seals the opening of the second recess. The liquid cooling according to claim 7, wherein a plurality of fins extending toward the bottom surface of each of the recesses are integrally provided on at least one of the first sealing body and the second sealing body. Jacket. The liquid cooling jacket according to claim 8, wherein the first sealing body and the second sealing body are made of an extruded shape member made of aluminum or an aluminum alloy. A partition guide wall that partitions the flow path of the heat transport fluid and guides the flow is formed on at least one of the bottom surface of the second recess and the surface of the second sealing body on the first sealing body side. The liquid cooling jacket according to claim 7. In the jacket body, a first fluid channel and a second fluid channel through which a heat transport fluid that transports heat generated by the heat generating body flows to the outside are stacked with a partition in the thickness direction of the jacket body A method for manufacturing a liquid cooling jacket formed by:
Forming a first recess on the surface of the jacket body and forming a second recess on the back surface of the jacket body; and
A first sealing body that seals the opening is installed in the opening of the first recess, and a second sealing body that seals the opening is installed in the opening of the second recess. Stopping body installation process;
The rotary tool is moved along the abutting portion between the opening peripheral edge of the first recess and the peripheral edge of the first sealing body to perform friction stir, and the opening peripheral edge of the second recess and the second sealing A method for manufacturing a liquid cooling jacket, comprising: a joining step of moving a rotating tool along a butt portion with a peripheral edge of a body to perform friction stirring. Before the sealing body installation step,
The liquid cooling jacket according to claim 11, further comprising a communication hole forming step of forming a communication hole in the partitioning portion for communicating the first fluid channel and the second fluid channel. Production method. The method for manufacturing a liquid cooling jacket according to claim 11 or 12, wherein, in the joining step, the rotating tool is rotated in the same direction as a moving direction with respect to the opening. The temporary joining step of temporarily joining a part of the abutting part using the rotating tool for temporary joining smaller than the rotating tool before the joining step. 14. A method for producing a liquid cooling jacket according to any one of items 13 to 13. The abutting portion has a rectangular ring shape;
15. The liquid cooling jacket according to claim 14, wherein, in the temporary joining step, one diagonal portion of the abutting portion is provisionally joined first, and then the other diagonal portion is provisionally joined. Method. The abutting portion has a rectangular ring shape;
15. The liquid cooling jacket according to claim 14, wherein, in the temporary joining step, the intermediate part of one opposite side of the abutting part is temporarily joined first, and then the intermediate part of the other opposite side is temporarily joined. Manufacturing method.

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