JP5725098B2 - Manufacturing method of liquid cooling jacket - Google Patents

Description

  The present invention relates to a method for manufacturing a liquid cooling jacket.

  In recent years, as the performance of electronic devices typified by personal computers has improved, the amount of heat generated by a CPU (heat generating body) mounted has increased, and cooling of the CPU has become 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. The jacket is drawing attention.

  In such a liquid cooling jacket, Patent Document 1 discloses a technique in which constituent members are joined to each other by friction stir welding (FSW = Friction Stir Welding). Friction stir welding is a technique in which metal members are fixed to each other by causing the metal at the abutting portion to plastically flow by frictional heat between the rotating tool and the metal member by moving the rotating tool along the abutting portion while rotating the rotating tool. Phase joining is performed. The liquid cooling jacket of Patent Document 1 includes, for example, a jacket main body having a fin housing chamber that houses metal fins and a sealing body that seals the fin housing chamber, and surrounds the fin housing chamber (concave portion). The liquid cooling jacket is manufactured by friction stir welding along the abutting portion between the peripheral wall of the jacket body and the sealing body.

JP 2006-324647 A (FIGS. 18 to 20)

  However, since the conventional jacket body cuts a metal block to form the fin housing chamber (recess), the manufacturing process of the jacket body requires a lot of labor and time, and a lot of material loss occurs. There was a problem that would occur.

  Accordingly, an object of the present invention is to provide a method for manufacturing a liquid cooling jacket capable of simplifying the processing of the liquid cooling jacket and shortening the time and reducing material loss.

As means for solving the above-mentioned problems, the present invention is configured by fixing a sealing body that seals the plurality of openings to a jacket main body having a plurality of openings, and a heat generating body is provided therein. A manufacturing method of a liquid cooling jacket in which a heat transport fluid for transporting generated heat to the outside flows, wherein the jacket body is constituted by a metal frame structure having a plurality of openings on both sides, wherein the opening edge of the opening, a support surface composed of one step lower step bottom from the surface in the thickness direction of the jacket body, formed flush to span a plurality of said openings, both sides of the jacket body on at least one inner surface of the sealing body to be secured to, leave upright fins, on the supporting surface, by placing the sealing member so as to cover a plurality of the opening, the jacket The step side surface of the main body and the sealing body The upper surface of the partition wall partitioning the adjacent openings and the lower surface of the sealing body are overlapped with each other, and the step side surface of the jacket body and the outer peripheral surface of the sealing body A rotating tool for friction stir welding is moved along the entire circumference of the abutting portion to form a plasticized region, and the rotating tool is moved along the overlapping portion of the upper surface of the partition wall and the lower surface of the sealing body When forming the plasticized region, the rotating tool is continuously moved along the abutting portion and the overlapping portion along one moving locus, and the joining of the abutting portion and the overlapping portion are continuously performed. And a method for manufacturing a liquid cooling jacket, wherein the rotation tool is moved so that the movement trajectory of the rotation tool in one overlapping portion is not overlapped.

According to such a method, cutting can be reduced as compared with the conventional manufacturing process of the jacket body, so that the processing can be simplified and the time can be shortened, and the material loss can be reduced. Moreover, a fin accommodating chamber can be easily formed by fixing a sealing body to the opening part of both surfaces of a frame structure. Further, since the plasticizing region is formed by rotating the rotary tool on both sides of the frame structure, distortion due to frictional heat of the jacket body can be suppressed. In addition, the contact area between the sealing body and the heat transport fluid can be increased, so that efficient heat transfer can be performed, and the channel wall of the heat transport fluid can be formed in the jacket body, so that the efficient heat transport fluid can be formed. Flow can be formed.

And this invention is comprised by fixing the sealing body which seals the said several opening part to the jacket main body which has several opening part, and transports the heat | fever which a heat generating body generate | occur | produces in the inside to the exterior A manufacturing method of a liquid cooling jacket through which a heat transport fluid flows, wherein the jacket main body is formed of a metal frame structure having a plurality of openings on both sides, and is formed on an opening peripheral edge of the plurality of openings. A sealing surface that is formed on the same surface so as to straddle a plurality of the openings, and is fixed to both surfaces of the jacket body. Fins are erected on at least one of the inner surfaces, a sealing body is placed on the support surface so as to cover the plurality of openings, and the step side surface of the jacket body and the sealing body While matching the outer peripheral surface of The upper surface of the partition wall that partitions the openings and the lower surface of the sealing body are overlapped, and along the entire circumference of the abutting portion between the step side surface of the jacket body and the outer peripheral surface of the sealing body. A rotating tool for friction stir welding is moved to form a plasticized region, and the rotating tool is moved along the overlapping portion of the upper surface of the partition wall and the lower surface of the sealing body to form the plasticized region. At the time, after completing the joining of the abutting portion, the overlapping portion is joined as a separate process, and in the joining of the overlapping portion, the insertion position of the rotary tool for friction stir welding is removed from the abutting portion. In addition to setting the upper surface of the peripheral wall of the jacket body, the pulling position of the rotary tool is set on the upper surface of the peripheral wall of the jacket body that is outside the abutting portion on the side opposite to the insertion position, This A liquid cooling jacket manufacturing method, wherein a moving locus of the rotary tool to move the rotary tool so as to be one without overlapping.

According to such a method, cutting can be reduced as compared with the conventional manufacturing process of the jacket body, so that the processing can be simplified and the time can be shortened, and the material loss can be reduced. Moreover, a fin accommodating chamber can be easily formed by fixing a sealing body to the opening part of both surfaces of a frame structure. In addition, the contact area between the sealing body and the heat transport fluid can be increased, so that efficient heat transfer can be performed, and the channel wall of the heat transport fluid can be formed in the jacket body, so that the efficient heat transport fluid can be formed. Flow can be formed.

  Further, in the present invention, when the rotation tool is moved clockwise with respect to the opening, the rotation tool is rotated clockwise, and when the rotation tool is moved counterclockwise with respect to the opening, The rotation tool is rotated leftward.

  According to such a method, the shear side where the relative speed of the rotating tool with respect to the bonded portion is increased is located on the thick jacket body side. For this reason, even if a cavity defect occurs, it will occur on the jacket main body side and at a part separated from the abutting part (shear side), and the heat transport fluid will be difficult to leak to the outside. The sealing performance is not reduced.

Further, according to the present invention, the support surface and the step side surface of the jacket main body and the peripheral portion and the outer peripheral surface of the sealing body are chamfered and flattened, and then degreased to remove oil on the surface. It is characterized by.

  Further, the present invention is characterized in that the fin is formed by cutting a metal block with a plurality of cutters arranged in parallel to each other.

  According to such a method, since a plurality of fins can be formed together by one processing, the processing time and labor can be shortened.

  Furthermore, the present invention is characterized in that, prior to the step of forming the plasticized region with the rotary tool, a part of the abutting portion is temporarily joined using a temporary joining rotary tool smaller than the rotary tool. And

  According to such a method, by temporarily joining the jacket body and the sealing body, the sealing body does not move during friction stir welding (hereinafter sometimes referred to as “main joining”). And it becomes easy to join and the positioning accuracy of a sealing body improves. Further, since the temporary welding rotary tool is smaller than the main welding rotary tool, the main welding can be completed only by moving the main welding rotary tool on the temporary bonding portion and performing frictional stirring.

  Further, the present invention is characterized in that a pilot hole is formed at an insertion position of the rotary tool.

  According to such a method, the load at the time of pushing in the rotating tool can be reduced.

  Further, according to the present invention, the frame structure has a rectangular frame shape, the end surface of the linear metal member is butted against the side surface of another adjacent linear metal member, and the butted portion between the metal members It is comprised by moving a rotation tool along and forming a plasticization area | region and joining.

  According to such a method, a large-sized jacket main body can be easily formed, and a frame structure with high airtightness and watertightness of the joint can be formed.

  According to the present invention, it is possible to simplify the processing of the liquid cooling jacket and to shorten the time, and to exhibit an excellent effect that the material loss can be reduced.

It is a perspective view of the liquid cooling jacket which concerns on 1st Embodiment. 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), (b) is a top view for demonstrating the manufacturing process of the jacket main body of the liquid cooling jacket which concerns on 1st Embodiment. (A), (b) is a top view for demonstrating the friction stir welding process of the manufacturing method of the liquid cooling jacket which concerns on 1st Embodiment. It is sectional drawing which showed the friction stir welding of the manufacturing method of the liquid cooling jacket which concerns on 1st Embodiment. (A), (b) is a top view for demonstrating the temporary joining process of the manufacturing method of the liquid cooling jacket which concerns on 2nd Embodiment. (A), (b) is a top view for demonstrating the temporary joining process of the manufacturing method of the liquid cooling jacket which concerns on 3rd Embodiment. It is a perspective view for demonstrating the formation process of the frame structure of the manufacturing method of the liquid cooling jacket which concerns on 4th Embodiment. It is a disassembled perspective view of the liquid cooling jacket which concerns on 4th Embodiment. (A), (b) is a top view for demonstrating the friction stir welding process of the manufacturing method of the liquid cooling jacket which concerns on 4th Embodiment. It is a perspective view for demonstrating the formation process of the frame structure of the manufacturing method of the liquid cooling jacket which concerns on 5th Embodiment. It is a disassembled perspective view of the liquid cooling jacket which concerns on 5th Embodiment. (A), (b) is a top view for demonstrating the friction stir welding process of the manufacturing method 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. (A)-(c) is a top view for demonstrating the friction stir welding process of the manufacturing method of the liquid cooling jacket which concerns on 6th Embodiment. (A), (b) is a top view for demonstrating the other friction stir welding process of the manufacturing method of the liquid cooling jacket which concerns on 6th Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with appropriate reference to the drawings. The first to fifth embodiments described below are reference embodiments, and the sixth embodiment is an embodiment according to the present invention.

(First embodiment)
First, the liquid cooling jacket formed by the method for manufacturing a liquid cooling jacket according to the first embodiment 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 generator) 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 releases heat transported by a heat transport fluid (cooling water), and a micropump (heat) that circulates the heat transport fluid. It mainly includes a transport fluid supply means), a reserve tank that absorbs expansion / contraction of the heat transport fluid due to temperature change, a flexible tube that connects these, and a heat transport fluid that transports heat. The heat transport fluid transports heat generated by a CPU (not shown), which is a heat generator, to the outside. As the heat transport fluid, for example, an ethylene glycol antifreeze is used. When the micropump is activated, the heat transport fluid circulates through these devices.

  The liquid cooling jacket is configured such that a CPU (not shown) is attached to the center of the lower side via a heat diffusion sheet (not shown), receives the heat generated by the CPU, and Exchanges heat with circulating heat transport fluid. Thereby, the liquid cooling jacket transfers the heat received from the CPU to the heat transport fluid, and as a result, the CPU is efficiently cooled. The thermal diffusion sheet is a sheet for efficiently transferring the heat of the CPU to the liquid cooling jacket, and is formed of a metal having high thermal conductivity such as copper, for example.

  As shown in FIG. 1, the liquid cooling jacket 1 includes a jacket main body 10 and a sealing body 30 that is fixed to both front and back surfaces of the jacket main body 10, and is configured so that a heat transport fluid flows therein. ing.

  As shown in FIG. 2, the jacket body 10 is composed of a metal frame structure, and has an inner space 11 inside thereof. The inner space 11 extends through the jacket body 10 in the thickness direction. The jacket body 10 includes openings 12 and 12 of the inner space 11 on both sides thereof. The opening 12 is constituted by both end portions in the thickness direction of the inner space 11 of the jacket body 10.

  As shown in FIGS. 2 and 4, the jacket main body (frame structure) 10 has a rectangular frame shape that is rectangular in plan view, and is formed by combining four linear metal members 20. The metal member 20 is made of aluminum or an aluminum alloy. As a result, the jacket body 10 is lighter and easier to handle. The plurality of metal members 20 include a long rectangular parallelepiped metal member 20 (hereinafter sometimes referred to as “20a”) that constitutes the long side and a long rectangular metal member 20 that constitutes the short side (hereinafter referred to as “20a”). , “20b” may be displayed). And after abutting the end face in the longitudinal direction of the long rectangular parallelepiped metal member 20a constituting the long side to the side surface of the long rectangular parallelepiped metal member 20b constituting the short side, the abutting portion The metal members 20a and 20b are joined together by moving a rotating tool (not shown) along the line 21 to form the plasticized region 43. In addition, the joining positional relationship between the metal members 20 and 20 is not limited to the above relationship, and the end surface in the longitudinal direction of the long rectangular parallelepiped metal member 20b constituting the short side is the long length constituting the long side. You may make it butt | match and join to the side surface of the rectangular parallelepiped metal member 20a.

  As shown in FIG. 2, the friction stir welding for joining the metal members 20, 20 is performed from both the front and back surfaces of the jacket body 10. The front end portion (the deepest portion in the depth direction) of the plasticizing region 43 formed from the front surface side and the front end portion of the plasticizing region 43 formed from the back surface side are superposed with each other. As a result, friction stir is performed over the entire thickness of the abutting portion 21 between the metal members 20 and 20, and the plasticized region 43 is formed. In the present specification, the “plasticization region” includes both a state in which the rotating tool is heated by frictional heat and is actually plasticized, and a state in which the rotating tool passes and returns to room temperature.

  Among the metal members 20 constituting the peripheral wall of the jacket main body 10, a pair of metal members 20 b, 20 b facing each other are formed with through holes 16, 16 for allowing the heat transport fluid to flow through the inner space portion 11. Yes. In the present embodiment, the through holes 16 and 16 extend in the opposing direction of the metal members 20b and 20b (X-axis direction in FIG. 2), have a circular cross section, and are intermediate in the thickness direction of the jacket body 10. It is formed in the part. In addition, the shape, number, and formation position of the through-hole 16 are not restricted to this, It can change suitably according to the kind and flow volume of heat transport fluid.

  A support surface 15a is formed on the peripheral edge (hereinafter referred to as “opening peripheral edge”) 12a of the opening 12 of the jacket main body 10 and is a step bottom surface that is stepped down from the surface of the jacket main body 10 in the thickness direction. The height difference between the surface of the jacket body 10 and the support surface 15a is set to the same dimension H1 (see FIG. 6) as the thickness dimension T1 (see FIG. 6) of the sealing body 30. The support surface 15a is a surface that supports the sealing body 30, and the sealing body 30 is installed on the jacket body 10 so that the peripheral edge 30a of the sealing body 30 abuts on the support surface 15a.

  The support surface 15a is formed on the opening peripheral portions 12a on both the front and back surfaces of the jacket body 10, and sealing is performed on the front and back surfaces of the jacket body 10 so that the peripheral portion 30a of the sealing body 30 abuts on the support surface 15a. A body 30 is installed.

  The sealing body 30 includes a plate-shaped lid plate portion 31 having the same outer peripheral shape (rectangular shape in the present embodiment) as the stepped side surface 15b of the jacket body 10, and a plurality of fins 32 provided on one surface of the lid plate portion 31. 32... The fins 32 are provided to increase the surface area of the sealing body 30.

  The plurality of fins 32, 32... Are arranged parallel to each other and orthogonal to the lid plate portion 31, and are configured integrally with the lid plate portion 31. Thereby, heat is transmitted favorably between the cover plate portion 31 and the fins 32, 32. As shown in FIGS. 2 and 3, the fins 32, 32... Extend in a direction (X-axis direction in FIG. 2) perpendicular to the longitudinal direction of the metal members 20b, 20b in which the through holes 16, 16 are formed. Are arranged to be. The fin 32 has a protruding dimension (length in the Z-axis direction in FIG. 2) that is substantially the same as the distance from the support surface 15a to the middle portion in the thickness direction of the jacket body 10, and the tip portion of the fin 32 faces the seal. It comes into contact with or close to the tip surface of the stop 30 (see FIG. 3). Thus, in a state where the pair of sealing bodies 30 are attached to the jacket main body 10, a space extending in the X-axis direction is defined by the cover plate portion 31 of the sealing body 30 and the adjacent fins 32 and 32. The space functions as a flow path 33 (see FIGS. 3 and 5A) through which the heat transport fluid flows. Further, the fins 32, 32... Have a length dimension (length in the X-axis direction in FIG. 2) shorter than the length dimension of the metal member 20a, and both ends in the longitudinal direction thereof are the metal members 20b, 20b. It is comprised so that a predetermined space | interval may be spaced apart from the inner surface of each. A space between the end portions of the fins 32, 32... And the metal member 20b constitutes a flow path header portion 34 (see FIGS. 3 and 5A) that connects the flow path 33 and the through hole 16. .

  The sealing body 30 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 sealing body 30 is produced, for example, by forming a cover plate portion 31 and fins 32 by cutting a metal block formed of aluminum or an aluminum alloy. The fins 32 are formed by cutting with a plurality of cutters arranged in parallel to each other. Thereby, since the several fin 32 can be collectively formed by one process, the time and effort of a process can be shortened. Note that the manufacturing method of the sealing body 30 is not limited to this. For example, a member having a cross-sectional shape including the lid plate portion 31 and the plurality of fins 32, 32... Is formed by extrusion molding or groove processing. Alternatively, both ends of the fin 32 may be removed.

  As shown in FIGS. 1 and 3, the sealing body 30 is installed in the openings 12 and 12 (only one side is shown in FIG. 1) on both sides of the jacket body 10, and the opening 12 and the sealing body 30 are The sealing body 30 is fixed to the jacket body 10 by forming the plasticizing region 41 by making the rotation tool 50 (see FIG. 6) around the abutting portion 40 (see FIG. 1).

  Next, a method for manufacturing the liquid cooling jacket 1 having the above configuration will be described. First, a method for forming the jacket body 10 will be described with reference to FIG.

  As shown in FIG. 4A, in order to join the metal members 20a and 20b by friction stirring, a block-shaped metal member joining first tab member 61 (hereinafter simply referred to as "first tab") having a rectangular parallelepiped shape is used. And a second tab member 62 for joining metal members (hereinafter simply referred to as “second tab member”). The 1st tab member 61 and the 2nd tab member 62 are arrange | positioned so that the abutting part 21 of metal member 20a, 20b may be pinched | interposed from the inner peripheral side of the jacket main body 10, and an outer peripheral side.

  In addition, although there is no restriction | limiting in particular in the material of the 1st tab member 61 and the 2nd tab member 62, In this embodiment, it forms with the metal material of the same composition as the metal member 20. FIG. Further, the shape and dimensions of the first tab member 61 and the second tab member 62 are not particularly limited, but in this embodiment, the thickness dimension is the same as the thickness dimension of the metal member 20 in the abutting portion 21. .

  When the jacket body 10 is manufactured, first, the four metal members 20, 20... To be joined are arranged in a rectangular frame shape in plan view, and the long side is formed on the side surface of the end of the metal member 20 b constituting the short side. The end surfaces of the metal members 20a constituting the two are brought into close contact with each other. In addition, before abutting the metal members 20 and 20, it is preferable that the abutting surfaces are chamfered and flattened, and then degreased to remove the oil on the surface. If it does in this way, since metal members 20 and 20 will adhere closely without gap, and organic substances and moisture, such as oil, can be removed from a mating surface, an organic residue and decomposition gas will mix in a plasticization field. Can be prevented, and the bondability of friction stir welding is improved.

  Then, the 1st tab member 61 and the 2nd tab member 62 are each arrange | positioned at the both sides of each butt | matching part 21,21 ... comprised by the edge part side surface of the metal member 20b, and the end surface of the metal member 20a. Further, the first tab member 61 and the second tab member 62 are temporarily fixed to the metal members 20a and 20b by welding.

  Then, the metal members 20, 20,..., The first tab member 61 and the second tab member 62 are placed on a frame of a friction stirrer (not shown) and restrained so as not to move using a jig (not shown) such as a clamp. To do. Then, a small temporary rotating tool for temporary joining (not shown) is connected to the abutting portion 63 between the first tab member 61 and the outer peripheral surface of the metal member 20, the abutting portion 21 between the metal members 20 and 20, and the second tab member 62. And the abutting portion 64 between the metal member 20 and the inner peripheral surface of the metal member 20 are appropriately moved so as to form a moving stroke (not shown) written in a single stroke in order to continuously agitate the abutting portions 63, 16, 64. To perform temporary bonding.

  Thereafter, a start position 65 is set at an appropriate position of the first tab member 61, and a pilot hole (not shown) into which a stirring pin of a main rotating tool (not shown) (not shown) is inserted is formed at the start position 65. To do. The starting position 65 is set on the surface of the first tab member 61 on the extension line of the abutting portion 21. The pilot hole is provided for the purpose of reducing the insertion resistance (press-fit resistance) of the stirring pin of the rotating tool for main joining. There is no restriction | limiting in the formation method of a pilot hole, For example, it can form by rotatingly inserting the well-known drill which is not shown in figure.

  When the formation of the pilot hole is completed, the main joining is performed to join the butt portion 21 in earnest. In the main joining, a main welding rotary tool having a diameter larger than that of the temporary joining rotary tool is used, and first, friction agitation is performed from the surface side of the jacket body 10 to the abutting portion 21 in the temporarily joined state. The stirring pin of the main rotating tool is inserted (press-fitted) into the pilot hole formed at the start position 65 on the first tab member 61 while rotating, and the inserted stirring pin is moved toward the abutting portion 21 side. When frictional stirring is performed up to one end (outer peripheral side) of the abutting portion 21, the main rotating tool is directly inserted into the abutting portion 21, and frictional stirring is performed along the abutting portion 21. When the main joining rotary tool is moved to the other end (inner peripheral side) of the abutting portion 21, the main joining rotary tool is moved away from the metal member 20b on the second tab member 62 while continuing frictional stirring. Is moved obliquely and moved toward the end position 66 set at an appropriate position on the second tab member 62 as it is.

  When the main welding rotating tool reaches the end position 66, the main rotating tool is raised while rotating, and the stirring pin is detached from the end position 66. At this time, if the stirring pin is removed upward at the end position 66, a pull-out hole 67 having substantially the same shape as the stirring pin is inevitably formed, but in this embodiment, it is left as it is.

  The above process is performed at each of the four abutting portions 21, 21,... To join the metal members 20, 20,.

  Then, the burr | flash which generate | occur | produced by each friction stirring is removed, Furthermore, the metal members 20, 20, ... are turned over, and a back surface (not shown) is turned up. Then, pilot hole formation and main joining are performed in the same process as described above. At this time, the friction stir in the main bonding on the back surface is performed so that the stirring pin of the rotating tool for main bonding enters the front side plasticized region 43 formed by the friction stirring from the front side. As a result, the abutting portion 21 is formed such that the plasticized region 43 formed from the front surface side and the bottom portions of the plasticized region 43 formed from the back surface side (see FIG. 3) are overlapped with each other.

  As described above, when the main joining from the front surface side and the back surface side is completed, the first tab member 61 and the second tab member 62 are cut off. As a result, the four metal members 20 are assembled in a rectangular frame shape, and the inner space portion 11 is formed on the inner peripheral side. And the opening part 12 (refer FIG. 2) of the inner space part 11 will be formed in the front and back both surfaces.

  In this embodiment, the start position 65 is set on the first tab member 61 and the end position 66 is set on the second tab member 62. However, the present invention is not limited to this. The end position may be set in the opposite direction.

  Thereafter, as shown in FIG. 4B, the opening peripheral edge portion 12a is cut to a predetermined depth to form the support surface 15a. There is no restriction | limiting in the formation method of the support surface 15a, For example, it can cut and form by well-known milling etc. Further, before and after the formation of the support surface 15a, through holes 16 and 16 (see FIG. 2) are formed in the pair of metal members 20b and 20b facing each other. There is no restriction | limiting in the formation method of the through-hole 16, For example, it can cut and form with a well-known drill. The jacket body 10 is formed by the above steps.

  Next, a method of fixing the sealing body 30 to the jacket body 10 by friction stir welding will be described with reference to FIGS. 5 and 6.

  First, a contact surface (a support surface 15a and a stepped side surface 15b of the jacket main body 10, a peripheral edge 30a and an outer peripheral surface 30b of the sealing body 30) on which the jacket main body 10 and the sealing body 30 are in contact with each other is chamfered. Then, after the surface is flattened, the oil and fat on the surface is removed by degreasing. By doing so, the jacket main body 10 and the sealing body 30 are closely adhered to each other, and organic matter such as oil and moisture can be removed from the joint surface, so that organic residue and decomposition gas are present in the plasticized region. It can prevent mixing, and the joining property of friction stir welding improves.

  Thereafter, as shown in FIG. 5A, the sealing body 30 is inserted into the inner space 11 of the jacket body 10 with the fins 32 on the lower side, and the peripheral portion of the sealing body 30 is inserted. 30a is placed on the support surface 15a. Then, the step side surface 15b of the jacket main body 10 and the outer peripheral surface 30b of the sealing body 30 are abutted to form the abutting portion 40.

  Subsequently, a pilot hole 54 (see FIG. 4B) is formed at the insertion position 53 of the rotary tool 50 (see FIG. 6) for joining the jacket body 10 and the sealing body 30. The pilot hole 54 is provided for the purpose of reducing the insertion resistance (press-fit resistance) of the stirring pin 52 (see FIG. 6) of the joining rotary tool 50 in a later step. There is no restriction | limiting in the formation method of the pilot hole 54, For example, it can form by rotatingly inserting the well-known drill which is not shown in figure. The timing of forming the pilot hole 54 is not limited to this, and may be formed before the support surface 15a is formed, or the sealing body 30 may be placed on the support surface 15a after the support surface 15a is formed. You may form before installing.

  Next, after the rotational tool 50 for friction stir welding is inserted into the insertion position 53, it is moved to the abutting portion 40, and subsequently moved along the abutting portion 40. 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 outer peripheral surface of the jacket body 10. According to this, the metal member 20 is thin, and the distance (gap) between the outer peripheral surface of the shoulder portion 51 (see FIG. 6) of the rotary tool 50 and the outer peripheral surface of the jacket body 10 is, for example, 2.0 mm. Even if it is below, the jacket main body 10 is hardly deformed outward by the pressing force of the rotary tool 50. In addition, when the thickness of the metal member 20 is thick, the said jig | tool does not need to be installed.

  The rotary tool 50 is made of a metal material that is harder than the jacket body 10 and the sealing body 30, and as shown in FIG. 6, the rotary tool 50 protrudes from the shoulder 51 having a columnar shape and the lower end surface of the shoulder 51. A stirring pin (probe) 52 is provided. The dimensions and shape of the rotary tool 50 may be set according to the material and thickness of the jacket body 10 and the sealing body 30. In the present embodiment, the stirring pin 52 has a truncated cone shape with a reduced diameter at the lower portion, and the protruding length dimension L1 is equal to or greater than the thickness dimension T1 of the lid plate portion 31 of the sealing body 30. . At the time of friction stir welding, the rotary tool 50 is pushed so that the tip of the stirring pin 52 penetrates the support surface 15a. The rotation speed of the rotary tool 50 is, for example, 500 to 15000 (rpm), the feed speed is, for example, 0.05 to 2 (m / min), and the pushing force for pressing the abutting portion 40 is, for example, 1 to 20 ( kN), which is appropriately selected according to the material, plate thickness, and shape of the jacket body 10 and the sealing body 30.

  Hereinafter, the movement of the rotary tool 50 will be specifically described. First, the rotary tool 50 is inserted into the insertion position 53 while rotating. As shown in FIG. 5A, the insertion position 53 of the rotary tool 50 is the upper surface of the metal member 20 that is outside the abutting portion 40. At this time, since a pilot hole 54 (see FIG. 4B) is formed in advance at the insertion position 53 of the rotary tool 50, the load when the rotary tool 50 is pushed in can be reduced. The insertion time (pressing time) of the rotary tool 50 can be shortened.

  Thereafter, the rotary tool 50 is moved from the insertion position 53 toward the abutting portion 40. If the axis is located on the abutting surface of the abutting portion 40, the moving direction is changed so that the rotary tool 50 moves along the abutting portion 40. At this time, the rotation direction (rotation direction) of the rotary tool 50 is set to be the same direction as the movement direction (revolution direction). That is, in the present embodiment, the rotary tool 50 is moved clockwise with respect to the opening 12 of the jacket body 10 (see arrow Y1 in FIG. 5A), so the rotary tool 50 is rotated to the right. (See arrow Y2 in FIG. 5A). When the rotary tool 50 is moved counterclockwise with respect to the opening 12, the rotary tool 50 is rotated counterclockwise.

  By doing in this way, the sealing body 30 side inside the abutting part 40 is the flow side 50a of the rotary tool 50 (the relative speed of the outer periphery of the rotary tool 50 with respect to the joined part is the tangential speed of the outer periphery of the rotary tool 50). The outer jacket body 10 is the shear side 50b of the rotating tool 50 (the relative speed of the outer periphery of the rotating tool 50 with respect to the joined portion is the rotating tool 50). Of the tangential velocity at the outer circumference of the sword and the value obtained by adding the magnitude of the moving speed). That is, the relative speed of the rotary tool 50 with respect to the bonded portion is large on the jacket body 10 side and small on the sealing body 30 side.

  Thereafter, the rotation and movement of the rotary tool 50 are continued, and the plasticizing region 41 is formed by making the rotary tool 50 go around the sealing body 30 as shown in FIG. At this time, after rotating the rotation tool 50 along the abutting portion 40, the rotation tool 50 is further moved along the start end including a portion (end 54b) advanced from the start end 54a of the first turn by a certain distance. As a result, the start end 54a and the end end 54b in the first round of the rotary tool 50 overlap, and a part of the plasticizing region 41 overlaps. Here, the “plasticization region” includes both a state in which the rotary tool 50 is heated by frictional heat and is actually plasticized, and a state in which the rotary tool 50 passes and returns to room temperature.

  Then, when the circular movement of the rotary tool 50 is completed, the rotary tool 50 is moved to the upper surface of the metal member 20 of the jacket body 10 that is outside from the plasticizing region 41 (butting portion 40), and at that position, The rotary tool 50 is pulled out. In this way, the extraction position 55 of the rotary tool 50 is located outside the abutting portion 40, so that the extraction hole 56 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 sealing body 30 can further be improved. The extraction hole 56 on the upper surface of the metal member 20 may be repaired by performing a process such as filling a weld metal.

  Then, the burr | flash which generate | occur | produced by friction stirring is removed, Furthermore, the jacket main body 10 is turned over and the back surface (not shown) is turned up. Then, pilot hole formation and main joining are performed in the same process as described above.

  As described above, the rotary tool 50 is moved along the abutting portion 40 around the opening 12 of the jacket body 10 on the front surface side and the back surface side of the jacket body 10, and friction stir welding is performed. By fixing the sealing body 30, the liquid cooling jacket 1 through which the heat transport fluid flows is formed.

  According to the manufacturing method of the liquid cooling jacket 1 according to the present embodiment, the jacket main body 10 is constituted by the frame structure, so that the metal block is cut as in the prior art to form the fin housing chamber (recess). It is not necessary to form. Thus, since there is no cutting process of the recessed part which requires much effort, while being able to attain simplification and time reduction of a process, material loss can be reduced.

  In addition, by fixing the sealing body 30 to the openings 12 on both sides of the jacket main body 10 (frame structure), a space serving as the flow path 33 can be easily formed inside, and the through hole 16 is interposed. Heat transport fluid can flow.

  When the rotary tool 50 is rotated while being moved, the rotary tool 50 is rotated clockwise when the rotary tool 50 is moved clockwise with respect to the opening 12, and the left is rotated when the rotary tool 50 is moved counterclockwise with respect to the opening 12. By rotating, the shear side 50b in which the relative speed of the rotary tool 50 with respect to the bonded portion is increased is positioned on the thick jacket body 10 side. On the shear side 50b, the relative speed of the rotary tool 50 with respect to the bonded portion is large, so that the amount of metal flow increases, the temperature tends to be higher than that on the flow side 50a, and a cavity defect may occur. However, even if a cavity defect occurs, it occurs on the jacket main body 10 side and in a portion away from the heat transport fluid flow path 33 at a position outside the abutting portion 40 (the shear side 50b). Since the fluid is less likely to leak to the outside, the sealing performance of the joint is not deteriorated.

  In addition, since the start end 54a and the end end 54b in the circular movement of the rotary tool 50 overlap and a part of the plasticized region 41 overlaps, there is no portion where the plasticized region 41 is interrupted in the opening peripheral edge portion 12a. . Therefore, since the jacket main body 10 and the sealing body 30 can be favorably joined, the sealing performance of the joined portion can be improved, and the heat transport fluid is less likely to leak to the outside.

  Furthermore, since the fins 32 are erected on the inner surface of the sealing body 30, the contact area between the sealing body 30 and the heat transport fluid increases in the inner space 11 of the jacket body 10 through which the heat transport fluid flows. Efficient heat transfer. At the same time, since the fins 32 can serve as walls in the inner space 11 of the jacket body 10 to form the flow path 33, the flow direction of the heat transport fluid is unified and an efficient heat transport fluid flow is formed. be able to.

  Moreover, in this embodiment, the frame structure which comprises the jacket main body 10 is exhibiting the rectangular frame shape, and butt | matches the end surface of the linear metal member 20a with the side surface of the other adjacent linear metal member 20b. Since the rotation tool is moved along the abutting portion 21 between the metal members 20a and 20b to form the plasticized region 43 and joined, the length and thickness of each side can be freely set. be able to. Thereby, the large jacket body 10 can be easily formed. Moreover, since the metal members 20a and 20b are joined together by friction stirring, a frame structure with high airtightness and watertightness at the joint can be formed. In particular, since the bottom portions of the plasticized regions 43 and 43 formed from the front and back surfaces of the jacket body 10 are polymerized with each other, the air tightness and the water tightness are further improved.

(Second Embodiment)
Next, the manufacturing method of the liquid cooling jacket which concerns on 2nd Embodiment is demonstrated with reference to FIG.

  In this embodiment, as shown in FIG. 7A, prior to the step of forming the plasticized region 41 (see FIG. 7B) with the rotary tool 50 of the first embodiment, the jacket body 10 A part of the abutting portion 40 between the opening peripheral edge portion 12 a of the opening 12 and the peripheral edge portion 30 a of the sealing body 30 is temporarily joined using a temporary joining rotary tool 60 smaller than the rotary tool 50. . After performing temporary joining, the main joining similar to 1st Embodiment is performed using the rotation tool 50 (refer FIG.7 (b)). In addition, the same code | symbol is attached | subjected to the structure similar to 1st Embodiment, and the description is abbreviate | omitted.

  The temporary joining rotary tool 60 includes a stirring pin (not shown) having a diameter smaller than that of the stirring pin 52 of the rotating tool 50, and the plasticized region 45 to be formed is formed by the rotating tool 50 in a later step. It has a width smaller than the width of the plasticized region 41 (see FIG. 7B). 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 extraction hole and the plasticizing region 45 of the temporary joining rotary tool 60 remaining in the plasticizing region 45 is left. 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 60, 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 such an order, the sealing body 30 can be temporarily joined to the jacket body 10 in a well-balanced manner, and the positioning accuracy of the sealing body 30 with respect to the jacket body 10 is improved. Deformation can be prevented. Moreover, by performing the temporary joining of the sealing body 30, it is possible to prevent the sealing body 30 from being displaced at the time of the main joining by the rotary tool 50, and to further improve the sealing performance of the joint portion.

(Third embodiment)
Next, the manufacturing method of the liquid cooling jacket which concerns on 3rd Embodiment is demonstrated with reference to FIG.

  In this embodiment, as shown in FIG. 8A, prior to the step of forming the plasticized region 41 (see FIG. 8B) with the rotary tool 50 of the first embodiment, the jacket body 10 A part of the abutting portion 40 between the opening peripheral edge portion 12 a of the opening 12 and the peripheral edge portion 30 a of the sealing body 30 is temporarily joined using a temporary joining rotary tool 60 smaller than the rotary tool 50. . 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 60, an intermediate portion 46 a of one opposite side 46, 46 of the abutting portion 40. , 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 plasticizing regions 48 formed by the temporary bonding rotary tool 60 are linearly formed with the same length.

  In this embodiment, by temporarily joining in the order as described above, the sealing body 30 can be temporarily joined to the jacket body 10 in a balanced manner, and the positioning accuracy of the sealing body 30 with respect to the jacket body 10 is improved. The deformation of the sealing body 30 can be prevented. Further, by performing temporary bonding of the sealing body 30, it is possible to prevent the sealing body 30 from being displaced during the main bonding by the rotary tool 50. Furthermore, according to this embodiment, since the friction stir welding for temporary bonding is linear, it is only necessary to move the temporary bonding rotary tool 60 linearly, and the processing is easy.

(Fourth embodiment)
Next, the manufacturing method of the liquid cooling jacket which concerns on 4th Embodiment is demonstrated with reference to FIG. 9 thru | or FIG.

  In this embodiment, as shown in FIG. 9, the frame structure 110 a constituting the jacket main body 110 (see FIG. 10) is formed by cutting the extruded shape member 120 having a rectangular frame-shaped cross-sectional shape. It is characterized by. The extruded shape member 120 is made of aluminum or an aluminum alloy. As a result, the jacket body 110 is lightened and easy to handle. The extruded shape member 120 has a long cylindrical shape having a hollow portion inside, and the cross-sectional shape thereof is the same as the planar shape of the jacket main body 110. And the frame structure 110a which comprises the jacket main body 10 is formed by leaving the space | interval of the thickness dimension of the jacket main body 110 in the longitudinal direction (extrusion direction) from the extruded shape member 120, and forming. The hollow portion of the extruded shape member 120 constitutes the inner space portion 11 of the jacket main body 110.

  After forming the frame structure 110a, as shown in FIG. 10, the opening peripheral edge 12a of the opening 12 of the inner space 11 of the frame structure 110a is cut to a predetermined depth to form a support surface 15a. The support surfaces 15a are formed on both surfaces of the frame structure 110a as in the first embodiment. In this embodiment, the support surface 15a is formed using a reamer (not shown). Thus, the support surface 15a and the step side surface 15b having a smooth surface are formed. Since the support surface 15a is formed using a reamer, the outer peripheral corner portion is formed in an arc shape. Accordingly, the outer peripheral corner portion of the sealing body 130 is also formed in an arc shape. In the present embodiment, since the frame structure 110a (see FIG. 9) is formed from the extruded profile 120, the jacket body 110 is smaller than the first embodiment, and the thickness dimension thereof is also small. Therefore, the sealing body 130 is formed in a flat plate shape. In this embodiment, the sealing body 130 is not provided with fins, but this is not intended to exclude the sealing body provided with fins.

  Before and after the formation of the support surface 15a, the through holes 16 and 16 are formed in the pair of peripheral walls 14 and 14 facing each other of the frame structure 110a. The jacket body 110 is formed through the above steps.

  If the jacket main body 110 is formed, contact surfaces (the support surface 15a and the stepped side surface 15b of the jacket main body 110, and the peripheral portion 30a and the outer peripheral surface 30b of the sealing body 130) where the jacket main body 110 and the sealing body 130 contact each other. Etc.) is chamfered and flattened, and then degreased to remove the oil on the surface.

  Thereafter, as shown in FIG. 11A, the peripheral edge 30a of the sealing body 130 is placed on the support surface 15a. Then, the step side surface 15b of the jacket main body 110 and the outer peripheral surface 30b of the sealing body 130 are abutted to form the abutting portion 40.

  Then, a pilot hole (not shown) is formed at the insertion position 53 set on the upper surface of the jacket main body 110 that is outside the abutting portion 40, and the rotary tool 50 is rotated and inserted into the insertion position 53.

  Thereafter, the rotary tool 50 is moved from the insertion position 53 toward the abutting portion 40. If the axis is located on the abutting surface of the abutting portion 40, the moving direction is changed so that the rotary tool 50 moves along the abutting portion 40. At this time, the rotation direction (spinning direction) of the rotary tool 50 is set to be the same direction as the moving direction (revolution direction) as in the first embodiment. Specifically, in this embodiment, both the rotation direction (see arrow Y2 in FIG. 11) and the movement direction (see arrow Y1 in FIG. 11) are clockwise.

  Thereafter, the rotation and movement of the rotary tool 50 are continued, and the plasticizing region 41 is formed by making the rotary tool 50 go around the opening 12 as shown in FIG. At this time, the rotating tool 50 makes a round along the abutting portion 40 and then moves along the starting end including a portion (end 54b) advanced from the starting end 54a in the first round by a certain distance. As a result, the start end 54a and the end end 54b in the first round of the rotary tool 50 overlap, and a part of the plasticizing region 41 overlaps.

  When the circular movement of the rotary tool 50 is completed, the rotary tool 50 is moved to the upper surface of the jacket main body 110 that is outside from the plasticizing region 41 (butting portion 40), and at that position (withdrawal position 55). Then, the rotary tool 50 is pulled out.

  Then, the burr | flash which generate | occur | produced by friction stirring is removed, Furthermore, the jacket main body 10 is turned over and the back surface (not shown) is turned up. Then, pilot hole formation and main joining are performed in the same process as described above. The liquid cooling jacket 1 is formed by the above process.

  According to the method for manufacturing the liquid cooling jacket 1 according to the present embodiment, in addition to the effects obtained in the first embodiment, the frame structure 110a is formed by cutting the extruded shape member 120. In addition, it is possible to obtain an effect that the jacket main body 110 with high shape accuracy can be easily formed. In addition, since the extruded shape member 120 is formed by plastic working, the strength is increased and it is possible to prevent the occurrence of cavity defects inside.

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

  In this embodiment, as shown in FIG. 12, a frame structure 210a constituting a jacket main body 210 (see FIG. 10) is formed by cutting an extruded shape member 220 having a rectangular frame-shaped cross section. The structure in which the frame structure 210a is formed by cutting the extruded shape member 220 is the same as that of the fourth embodiment, but the shape of the hollow portion is different from that of the fourth embodiment.

  The extruded shape member 220 has two rows of hollow portions having a circular cross section inside. As shown in FIG. 13, the frame structure 210a has two circular inner spaces 211 formed at a predetermined interval. Accordingly, the support surface 215a is formed in an annular shape at the opening peripheral edge 212a of the opening 212. Moreover, the sealing body 230 is formed in a disk shape.

  Thereafter, as shown in FIG. 14A, the peripheral portion 230a of the sealing body 230 is placed on the support surface 215a. Then, the step side surface 215b of the jacket main body 210 and the outer peripheral surface 230b of the sealing body 230 are abutted to form a circular abutting portion 240.

  Then, a pilot hole (not shown) is formed at an insertion position 253 set on the upper surface of the jacket main body 210 that is outside the abutting portion 240, and the rotary tool 50 is inserted into the insertion position 253 while rotating.

  Thereafter, the rotary tool 50 is moved from the insertion position 253 toward the abutting portion 240. If the axis is located on the abutting surface of the abutting portion 240, the moving direction is changed so that the rotary tool 50 moves along the abutting portion 240. At this time, the rotation direction (spinning direction) of the rotary tool 50 is set to be the same direction as the moving direction (revolution direction) as in the first embodiment. Specifically, in the present embodiment, the rotation direction (see arrow Y2 in FIG. 14) and the movement direction (see arrow Y1 in FIG. 14) are both counterclockwise.

  Thereafter, the rotation and movement of the rotary tool 50 are continued, and the plasticizing region 41 is formed by making the rotary tool 50 go around the sealing body 230 as shown in FIG. In the present embodiment, the rotating tool 50 makes one turn along the abutting portion 240, and then moves to the upper surface of the jacket body 210 that is outside from the start end 254 of the first turn, and at that position (withdrawal position 255), The rotary tool 50 is pulled out. The adjacent inner space 211 is also subjected to the same friction stir to fix the sealing body 230.

  Thereafter, burrs generated by friction stirring are removed, the jacket body 210 is turned over, and the back surface (not shown) is turned up. Then, pilot hole formation and main joining are performed in the same process as described above. The liquid cooling jacket 1 is formed by the above process.

  According to the method for manufacturing the liquid cooling jacket 1 according to this embodiment, in addition to the effects obtained in the first embodiment, the frame structure 210a is formed by cutting the extruded shape member 220. In addition, it is possible to easily form the jacket main body 210 with high shape accuracy, and it is possible to obtain the operational effect that the two inner space portions 211 can be simultaneously formed by one processing with less effort. Since the two inner space portions 211 are formed, the amount of flowing heat transport fluid is large and efficient cooling can be performed.

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

  In this embodiment, the structure in which the frame structure constituting the jacket main body 310 is formed by cutting an extruded shape member (not shown) is the same as that of the fourth and fifth embodiments, but the inner space The shape of the jacket main body 310 is different in terms of the number and arrangement of the parts.

  The jacket main body 310 has a rectangular shape in plan view and includes three inner space portions 311 having a substantially square cross section. The inner space 311 is arranged in a straight line along the longitudinal direction of the jacket main body 310, and a partition wall 317 is located between adjacent inner spaces 311. In the present embodiment, three inner space portions 311 are formed. Therefore, on both sides of the inner space portion 311 located in the middle, partition walls facing each other (hereinafter referred to as “first partition wall 317a, second space”). The partition wall 317b may be referred to as a support wall 315a that is one step lower than the surface of the jacket main body 310. The support surface 315a is integrally formed on the same plane continuously from the opening peripheral edge 312a of the inner cavity 311 at one end in the longitudinal direction to the opening peripheral edge 312a of the inner cavity 311 at the other end. It is formed also in the part of the 1st partition wall 317a and the 2nd partition wall 317b.In this embodiment, the support surface 315a is formed using the reamer (not shown). The outer peripheral corner portion of 15a is formed in an arc shape.

  Through holes 16 and 16 for flowing a heat transport fluid are formed in the peripheral walls 314 located at both ends in the longitudinal direction of the jacket main body 310, respectively. Further, through holes 316 and 316 are also formed in the first partition wall 317a and the second partition wall 317b between the adjacent inner space portions 311. These through holes 16, 316, 316, 16 are formed so as to extend along the longitudinal direction of the jacket main body 310, so that the three inner spaces 311, 311, 311 communicate as one flow path. It is configured. The through holes 16, 316, 316, 16 are formed so as to be alternately staggered on the left and right when viewed from the longitudinal direction of the jacket main body 310 so that the heat transport fluid meanders alternately on the left and right. It is configured. The through holes 16 and 316 are formed in the middle portion of the jacket body 310 in the thickness direction.

  Corresponding to the shape of the support surface 315a as described above, the sealing body 330 is formed of a single plate so as to cover the three inner spaces 311. And the outer periphery corner part of the sealing body 130 is also formed in circular arc shape.

  As shown in FIG. 16C, the sealing body 330 includes an abutting portion 340 between the outer peripheral surface 330 b of the sealing body 330 and the step side surface 315 b of the jacket main body 310, the first partition wall 317 a and the second partition wall 317 a. The rotating tool 50 is moved along the partition wall 317b to form the plasticized region 41, thereby being fixed to the jacket main body 310.

  Below, the process of the friction stir welding fixed to the sealing body 330 and the jacket main body 310 is demonstrated.

  First, a contact surface (a support surface 315a and a stepped side surface 315b of the jacket main body 310, a peripheral portion 330a and an outer peripheral surface 330b of the sealing body 330, etc.) where the jacket main body 310 and the sealing body 330 are in contact with each other is chamfered. Then, after the surface is flattened, the oil and fat on the surface is removed by degreasing.

  Thereafter, as shown in FIG. 16A, the peripheral portion 330a of the sealing body 330 is placed on the support surface 315a. Then, the step side surface 315b of the jacket main body 310 and the outer peripheral surface 330b of the sealing body 330 are abutted to form an abutting portion 340. Further, the upper surface (support surface 315a) of the first partition wall 317a and the second partition wall 317b between the adjacent inner space portions 311 and the lower surface of the sealing body 330 are overlapped to form a superposed portion.

  Then, a pilot hole (not shown) is formed at the insertion position 53 set on the upper surface of the jacket main body 310 that is outside the abutting portion 340, and the rotary tool 50 is rotated and inserted into the insertion position 53.

  Thereafter, the rotary tool 50 is moved from the insertion position 53 toward the abutting portion 340. If the axis is located on the abutting surface of the abutting portion 340, the moving direction is changed so that the rotary tool 50 moves along the abutting portion 340. At this time, the rotation direction (spinning direction) of the rotary tool 50 is the same as the movement direction (revolution direction) as in the first embodiment. In this embodiment, the rotation direction (in FIG. 16, Both the arrow Y2) and the moving direction (see arrow Y1 in FIG. 16) are clockwise.

  Thereafter, the rotation tool 50 continues to rotate and move, and moves from the short side 340a (lower side in FIG. 16) to the long side 340b (left side in FIG. 16) of the butt portion 340, and the first section of the long side 340b. It moves to the short side 340c (upper side in FIG. 16) beyond the intersection 341b with the wall 317a and the intersection 341c with the second partition wall 317b. Furthermore, it moves to the long side 340d (right side in FIG. 16), and moves to the intersection 341a with the first partition wall 317a beyond the intersection 341d with the second partition wall 317b of the long side 340d. Here, the rotating tool 50 moves on the first partition wall 317a while changing the moving direction to the right side.

  Then, as shown in FIG. 16 (b), when the rotary tool 50 reaches the intersection 341b between the long side 340b and the first partition wall 317a, the moving direction is bent and changed to the right to change the long side 340b. Move along. Then, when the rotary tool 50 moves to the intersection 341c between the long side 340b and the second partition wall 317b, the rotation tool 50 is moved on the second partition wall 317b while bending the direction of movement to the right. Then, when the rotary tool 50 reaches the intersection 341d between the long side 340d and the second partition wall 317b, the rotation tool 50 is further bent to the right to change the movement direction and move along the long side 340d.

  Thereafter, as shown in FIG. 16C, the rotary tool 50 returns to the short side 340a beyond the intersection 341a of the long side 340d with the first partition wall 317a and goes around the abutting portion 340. As a result, the rotation tool 50 moves on the abutting portion 340, the first partition wall 317a, and the second partition wall 317b (overlapping portion) with a one-stroke movement trajectory to form the plasticized region 41. And the rotation tool 50 will always rotate clockwise with respect to the abutting part 340.

  Then, after rotating around the abutting portion 340, the rotary tool 50 moves along the start end including a portion of a certain distance from the start end 54a in the first turn. As a result, the start end 54a and the end end 54b in the first round of the rotary tool 50 overlap, and a part of the plasticized region 41 overlaps.

  When the circular movement of the rotary tool 50 is completed, the rotary tool 50 is moved to the upper surface of the jacket main body 310 that is outside from the plasticizing region 41 (abutting portion 340). Pull out 50.

  Thereafter, burrs generated by friction stirring are removed, the jacket body 310 is turned over, and the back surface (not shown) is turned up. Then, pilot hole formation and main joining are performed in the same process as described above. The liquid cooling jacket 1 is formed by the above process.

  According to the method for manufacturing the liquid cooling jacket 1 according to the present embodiment, in addition to the operational effects obtained in the first embodiment, the frame structure is formed by cutting the extruded shape. It is possible to easily form the jacket body 310 with high accuracy and to obtain the operational effect that the three inner space portions 311 can be formed with less effort.

  In addition, since the through holes 16 and 316 that communicate with the inner space portions 311 are arranged in a staggered manner, the heat transport fluid is stirred and flows uniformly in the entire inner space portion 311, and efficient cooling is achieved. It can be carried out.

  Further, when the rotary tool 50 is moved along the movement locus as described above, the rotary tool 50 always rotates clockwise with respect to the abutting portion 340. Here, since the rotary tool 50 rotates to the right, the shear side 50b where the relative speed of the rotary tool 50 with respect to the joined portion increases is located on the thick jacket body 310 side. On the shear side 50b, the relative speed of the rotary tool 50 with respect to the bonded portion is large, so that the amount of metal flow increases, the temperature tends to be higher than that on the flow side 50a, and a cavity defect may occur. However, even if a cavity defect occurs, it occurs on the jacket main body 310 side and in a portion separated from the heat transport fluid flow path (inner space portion 311) at a position outside the abutting portion 340 (shear side 50b). As a result, the heat transport fluid is less likely to leak to the outside, and the sealing performance of the joint is not deteriorated.

  In addition, the movement locus | trajectory of the rotation tool 50 is not limited to the said locus | trajectory, The rotation tool 50 should just always move around the same direction with respect to the butt | matching part 340. FIG. Further, the movement of the rotary tool 50 is not limited to a one-stroke stroke.

  For example, as shown in FIG. 17A, after rotating the rotary tool 50 once with respect to the abutting portion 340 and pulling it out, as shown in FIG. 17B, the rotary tool 50 is moved to the first partition wall 317a. The top and the second partition wall 317b (overlapping portion) may be moved separately. When moving on the first partition wall 317a and the second partition wall 317b, the rotary tool 50 is inserted into an insertion position 356 set on the upper surface of the jacket main body 310 that is out of the abutting portion 340. To the abutting portion 340 (long side 340b) and moves on the first partition wall 317a (or on the second partition wall 317b). Further, the rotary tool 50 further pulls out on the upper surface of the jacket main body 310 that crosses the abutting portion 340 (long side 340d) on the opposite side and comes out of the abutting portion 340 on the opposite side to the insertion position 356. It moves to position 357 and is pulled out at that position.

  Even in this case, the rotary tool 50 always rotates clockwise while moving clockwise around the sealing body 330. Therefore, the shear side 50b is thick and has a large amount of metal. It will be located in the 310 side and the effect as mentioned above can be acquired.

  As mentioned above, although embodiment of this invention was described, embodiment of this invention is not limited to this, In the range which does not deviate from the meaning of this invention, it can change suitably, For example, in the said embodiment, Although the sealing body 30 is substantially rectangular or circular in plan view, the shape is not limited to this, and may be other shapes such as a polygon. Furthermore, the shape, number, and arrangement shape of the inner space are not limited to the above embodiment, and can be changed as appropriate.

  Furthermore, in the above-described embodiment, the friction stir welding is performed using the rotary tool 50 with the stirring pin. However, when the sealing body is thin, the rotary tool 50 without the pin is used. Also good.

DESCRIPTION OF SYMBOLS 1 Liquid cooling jacket 10 Jacket main body 12 Opening part 12a Opening peripheral part 20 Metal member 21 Butting part 30 Sealing body 30b Outer peripheral surface 32 Fin 40 Butting part 41 Plasticizing area | region 43 Plasticizing area | region 50 Rotating tool 54 Pilot hole 110 Jacket main body 110a Frame structure 12a Opening peripheral edge portion 130 Sealing body 210 Jacket body 210a Frame structure 230 Sealing body 240 Butting portion 310 Jacket body 330 Sealing body 340 Butting portion

Claims (8)

A liquid in which a sealing body that seals the plurality of openings is fixed to a jacket body having a plurality of openings, and a heat transport fluid that transports heat generated by the heat generator to the outside flows in the jacket body A method of manufacturing a cold jacket,
The jacket body is composed of a metal frame structure having a plurality of openings on both sides,
A support surface consisting of a step bottom surface that is stepped down in the thickness direction from the surface of the jacket main body is formed on the peripheral edge of the plurality of openings, so as to straddle the plurality of openings.
A fin is erected on the inner surface of at least one of the sealing bodies fixed on both surfaces of the jacket body,
On the support surface, by placing the sealing member so as to cover a plurality of the openings, with matching an outer peripheral surface of the stepped side surface and the sealing body of the jacket body, wherein the adjacent opening portions And the upper surface of the partition wall that partitions the upper surface and the lower surface of the sealing body,
Moving the rotary tool for friction stir welding along the entire circumference of the abutting portion between the step side surface of the jacket body and the outer peripheral surface of the sealing body to form a plasticized region;
When forming the plasticized region by moving the rotary tool along the overlapping portion of the upper surface of the partition wall and the lower surface of the sealing body,
The rotary tool is continuously moved along the abutting portion and the overlapping portion in one movement locus, and the joining of the abutting portion and the overlapping portion are continuously performed, and the one in the overlapping portion A method for manufacturing a liquid cooling jacket, characterized in that the rotating tool is moved so that the movement trajectory of the rotating tool becomes one without overlapping. A liquid in which a sealing body that seals the plurality of openings is fixed to a jacket body having a plurality of openings, and a heat transport fluid that transports heat generated by the heat generator to the outside flows in the jacket body A method of manufacturing a cold jacket,
The jacket body is composed of a metal frame structure having a plurality of openings on both sides,
A support surface consisting of a step bottom surface that is stepped down in the thickness direction from the surface of the jacket main body is formed on the peripheral edge of the plurality of openings, so as to straddle the plurality of openings.
A fin is erected on the inner surface of at least one of the sealing bodies fixed on both surfaces of the jacket body,
On the support surface, by placing the sealing member so as to cover a plurality of the openings, with matching an outer peripheral surface of the stepped side surface and the sealing body of the jacket body, wherein the adjacent opening portions And the upper surface of the partition wall that partitions the upper surface and the lower surface of the sealing body,
Moving the rotary tool for friction stir welding along the entire circumference of the abutting portion between the step side surface of the jacket body and the outer peripheral surface of the sealing body to form a plasticized region;
When forming the plasticized region by moving the rotary tool along the overlapping portion of the upper surface of the partition wall and the lower surface of the sealing body,
After completing the joining of the abutting portion, performing the joining of the overlapping portion as a separate process, and in the joining of the overlapping portion, the jacket main body where the insertion position of the rotary tool for friction stir welding is removed from the abutting portion And setting the pulling position of the rotating tool to the upper surface of the peripheral wall of the jacket body that is outside the abutting portion on the side opposite to the insertion position, and the rotation in one overlapping portion A method of manufacturing a liquid cooling jacket, characterized in that the rotating tool is moved so that the movement trajectory of the tool becomes one without overlapping. When moving the rotary tool clockwise with respect to the opening, rotate the rotary tool clockwise,
The method for manufacturing a liquid cooling jacket according to claim 1, wherein when the rotating tool is moved counterclockwise with respect to the opening, the rotating tool is rotated counterclockwise. The said support surface of the said jacket main body, the said level | step difference side surface, the peripheral part of the said sealing body, and the said outer peripheral surface are made into a flat surface, and after that, it degreases and removes the oil on the surface. The manufacturing method of the liquid cooling jacket of any one of Claim 1 thru | or 3. The liquid cooling jacket according to any one of claims 1 to 4, wherein the fin is formed by cutting a metal block with a plurality of cutters arranged in parallel to each other. Method. Prior to the step of forming the plasticized region with the rotary tool, a part of the abutting portion is temporarily joined using a rotary tool for temporary joining that is smaller than the rotary tool. The manufacturing method of the liquid cooling jacket of any one of Claim 5. The method for manufacturing a liquid cooling jacket according to any one of claims 1 to 6, wherein a pilot hole is formed at an insertion position of the rotary tool. The frame structure has a rectangular frame shape, the end surface of the linear metal member is abutted against the side surface of another adjacent linear metal member, and the rotating tool is moved along the abutting portion between the metal members. The manufacturing method of the liquid cooling jacket according to any one of claims 1 to 7, wherein the manufacturing method is configured by moving and forming a plasticized region and joining.

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