JP5949836B2 - Liquid cooling jacket - Google Patents

Description

  The present invention relates to a liquid cooling jacket.

  A technique for bonding or mechanically fixing a resin member and a metal member is required from a wide range of fields such as the automobile industry and the industrial equipment industry. Although an adhesive can be used as a method for joining the resin member and the metal member relatively easily, there is a problem that sufficient strength cannot be obtained with the adhesive. Therefore, Patent Document 1 discloses a technique in which a metal member made of an aluminum alloy is inserted into a mold in advance, and then a plastic plastic material is injected into the mold to join both members.

JP 2007-50630 A

  Conventionally, for example, a liquid cooling jacket used for cooling a heat generating body such as a CPU (Central Processing Unit) is known. The liquid cooling jacket is required to be further reduced in weight.

  From such a viewpoint, an object of the present invention is to provide a liquid cooling jacket capable of reducing the weight.

In order to solve such a problem, the present invention provides a jacket body made of a thermoplastic resin having a recess that is partially opened while a heat transport fluid that transports heat generated by a heat generator flows to the outside. A liquid cooling jacket to which an aluminum or aluminum alloy sealing body that seals the opening of the thermoplastic resin is bonded, wherein the jacket body made of thermoplastic resin comprises a bottom wall and a peripheral wall, and the sealing The stationary body includes a lid plate portion and a plurality of fins formed on the lid plate portion and extending toward the concave portion, and an opening peripheral portion of the concave portion of the jacket body made of thermoplastic resin. Is formed with a step surface at a position one step down from the peripheral wall, and the step surface and the periphery of the lid plate portion of the sealing body are joined together, and the jacket body made of thermoplastic resin The bottom surface of the recess Are of the fin and in compartment cylindrical space in the recess, the space, is functioning as a flow path for cooling water flows, said sealing body, the contact between the jacket body made of thermoplastic resin The thermoplastic resin is contained in the concave and convex portions formed on the surface.

Also, the present invention seals the opening of the recess to a jacket body made of a thermoplastic resin having a recess that is partially opened while a heat transport fluid that transports heat generated by the heat generator flows to the outside. A liquid cooling jacket to which a sealing body made of aluminum or an aluminum alloy is joined, wherein the jacket body made of thermoplastic resin includes a bottom wall and a peripheral wall, and the sealing body includes a lid plate portion And a plurality of fins formed on the cover plate portion and extending toward the recess, and the opening peripheral portion of the recess of the jacket body made of thermoplastic resin is one step from the peripheral wall. A stepped surface is formed at a lowered position, the stepped surface is joined to a peripheral edge of the lid plate portion of the sealing body, and a bottom surface of the concave portion of the jacket body made of thermoplastic resin and a plurality of bottom surfaces The fin and the concave Cylindrical space are partitioned within, its space, which functions as a flow path through which cooling water flows, the encapsulant, the anodized film on the contact surface between the jacket body made of thermoplastic resin is formed The thermoplastic resin is contained in the concave and convex portions formed on the anodic oxide film.

According to such a configuration, since the jacket body is made of resin, the weight can be reduced. Moreover, since the melted thermoplastic resin enters the concave portion of the jacket body and the contact area between the jacket body and the sealing body increases, the jacket body can be more firmly joined. Moreover, according to this structure, the space divided by the bottom face of the said recessed part and the said several fin can be made into the flow path through which a heat transport fluid flows.

  The liquid cooling jacket according to the present invention can reduce the weight.

It is the perspective view which showed the joining method of the resin member and metal member which concern on 1st embodiment. It is the figure which showed the rotary tool for friction stirring, Comprising: (a) is sectional drawing, (b) is a bottom view. It is the disassembled perspective view which showed the liquid cooling jacket which concerns on 2nd embodiment. It is a perspective view which faces the sealing body of the liquid cooling jacket which concerns on 2nd embodiment from the downward direction. It is the top view which showed the friction stirring process which concerns on 2nd embodiment in steps. It is the II sectional view taken on the line of (a) of FIG. It is sectional drawing which showed the modification of the friction stirring process which concerns on 2nd embodiment. It is the perspective view which showed the joining method of the resin member and metal member which concern on 3rd embodiment. It is a perspective view for demonstrating an Example.

[First embodiment]
A first embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, in this embodiment, the case where the composite member 1 is formed by joining a plate-like resin member 2 and a plate-like metal member 3 will be described as an example.

  The resin member and metal member joining method according to the present embodiment (hereinafter simply referred to as “joining method”) includes a superposing step of superposing the resin member 2 and the metal member 3, and friction stirring on the metal member 3. And a friction stirring step to be performed.

  First, in the overlapping process, as shown in FIG. 1, the metal member 3 is placed on the resin member 2, and a part of the upper surface of the resin member 2 and a part of the lower surface of the metal member 3 are brought into contact with each other. In this embodiment, the resin member 2 is a plate-like member made of PET (Polyethylene terephthalate). The material of the resin member 2 is not limited to PET, and may be appropriately selected from thermoplastic resins according to applications.

  In the present embodiment, the metal member 3 is a plate-like member made of aluminum alloy (A5052-O). The metal member 3 may be appropriately selected from metal materials capable of friction stir, such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy, depending on the application. Hereinafter, the metal member 3 is also referred to as “aluminum alloy member 3”.

  Next, in the friction agitation step, as shown in FIGS. 2A and 2B, a rotary tool G (hereinafter also referred to as a friction agitation rotary tool G) is used from the upper surface side of the aluminum alloy member 3. Friction stirring is performed on the aluminum alloy member 3. The friction stirring tool G includes a shoulder portion G1 having a substantially columnar shape and a pin portion G2 protruding from the lower surface (end surface) of the shoulder portion G1. The rotary tool G for friction stirring is made of a metal material harder than the aluminum alloy member 3 such as tool steel. As shown in FIG. 2B, the pin portion G2 has a spiral portion G11 that exhibits a spiral shape in plan view, and a circular portion G12 that is formed in the center of the shoulder portion G1 and has a circular shape in plan view. What is necessary is just to set suitably the shape of a shoulder part G1, the pin part G2, a magnitude | size, etc. according to the target object to join. Moreover, you may use the rotation tool for friction stirring that the lower surface (end surface) of the shoulder part G1 is flat, without providing the pin part G2.

  In the friction stirring step, the resin member 2 and the aluminum alloy member 3 are restrained so as not to move, and then the lower surface (end surface) of the friction stirring rotary tool G is opposed to the aluminum alloy member 3, so that an arbitrary upper surface of the aluminum alloy member 3 is formed. The position is pushed (pressed) at a predetermined depth, and the friction stirring rotary tool G is relatively moved along the longitudinal direction of the aluminum alloy member 3. The rotational speed and the traveling speed of the friction stir rotating tool G are not particularly limited, but are moved at, for example, a rotational speed of 1000 rpm and a traveling speed of 300 mm / min.

  A plasticized region W is formed on the upper surface of the aluminum alloy member 3 along the movement locus of the friction stirring rotary tool G. Here, the “plasticization region” includes both the state heated by the frictional heat of the friction stirring rotary tool G and actually plasticized, and the state where the friction stirring rotary tool G passes and returns to normal temperature. I will do it. In the present embodiment, the friction stir is performed with a pressing amount such that the plasticized region W does not contact the resin member 2. In addition, it is preferable that the burr | flash which generate | occur | produced on the upper surface of the aluminum alloy member 3 by friction stirring is excised by cutting.

  According to this joining method, the frictional heat is generated by pressing and moving the rotating tool G for friction stirring rotated from above the aluminum alloy member 3 with respect to the overlap of the resin member 2 and the aluminum alloy member 3. Thus, the resin on the surface (surface layer portion) of the resin member 2 is melted and cured again as the temperature decreases. Thereby, the resin member 2 is welded and joined to the lower surface of the aluminum alloy member 3. That is, both members can be joined relatively easily by simply pressing the friction stirring rotary tool G. Further, in the above-described conventional method, since the injection molding of the resin and the joining of the resin member and the aluminum alloy member were performed at the same time, it was impossible to join the existing member. According to the joining method, the existing resin member 2 and the aluminum alloy member 3 can be joined.

  Moreover, since the friction stir rotating tool G is simply pressed against a desired joint location, the degree of freedom in design can be increased. Moreover, since the metal member can be pressed in a balanced manner by pressing the end surface of the rotating tool G for friction stirring against the aluminum alloy member 3, the joining accuracy can be increased. Further, the plasticized c region W formed by friction stirring may be joined so as to be in contact with the resin member 2, but it is shallow so that the plasticized region W does not contact the resin member 2 as in this embodiment. Bonding can also be performed by friction stirring.

  In addition, it is preferable to set the outer diameter of the shoulder part G1 of the rotary tool G for friction stirring to 2 to 5 times the thickness of the aluminum alloy member 3. Moreover, it is preferable to set the pressing amount of the rotary tool G for friction stirring (the pressing length from the upper surface of the aluminum alloy member 3 to the lower surface of the shoulder portion G1) to 5% to 20% of the thickness of the aluminum alloy member 3. . By setting the outer diameter of the shoulder part G1 or the pressing amount of the friction stirring rotary tool G in this way, the bonding strength can be increased. The reason will be described later.

  Moreover, after performing the etching process or the alumite (anodization) process to the surface which contacts the resin member 2 among the aluminum alloy members 3, the said friction stirring process may be performed after forming the said contact surface in unevenness. preferable. According to such a joining method, since the molten resin enters the concave portion of the aluminum alloy member 3 and the contact area between the resin member 2 and the aluminum alloy member 3 is increased, the joining can be performed more firmly.

  The etching process is performed, for example, by immersing the aluminum alloy member 3 in an etching solution prepared by adding aluminum chloride hexahydrate to a hydrochloric acid solution. On the other hand, the alumite treatment is performed by electrochemically oxidizing the surface of the aluminum alloy member 3 by electrolyzing the aluminum alloy as an anode using dilute sulfuric acid or oxalic acid.

  In addition, as surface treatment which makes the surface of the aluminum alloy member 3 uneven, it is not limited to an etching process or an alumite process, For example, the surface may be rough-cut with a wire brush etc. and unevenness may be formed.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the present embodiment, as shown in FIG. 3, as an example, a liquid cooling jacket P having a resin jacket body 10 and a metal (aluminum alloy in this embodiment) sealing body 30 is manufactured. explain. The liquid cooling jacket P is used for cooling a heat generating body such as a CPU (Central Processing Unit), for example.

  As shown in FIG. 3, the liquid cooling jacket P partially includes cooling water (not shown) that is a heat transport fluid that transports heat generated by a CPU (not shown) that is a heat generator to the outside. A sealing body 30 that seals the opening 12 of the recess 11 is fixed to the jacket body 10 having the recess 11 that is open.

  The liquid cooling jacket P is configured such that a CPU (not shown) is attached to the lower center of the liquid cooling jacket P via a heat diffusion sheet (not shown). As the cooling water flows through P, the heat generated by the CPU is received and exchanged with the cooling water flowing through the inside. Thereby, the liquid cooling jacket P transfers the heat received from the CPU to the cooling water, and as a result, the CPU is efficiently cooled. The thermal diffusion sheet is a sheet for efficiently transmitting the heat of the CPU to the jacket body 10 and is formed of a metal having high thermal conductivity such as copper, for example.

  The jacket main body 10 is a shallow box that is open on one side (the upper side in the present embodiment), and has a recess 11 formed therein, and has a bottom wall 13 and a peripheral wall 14. . In the present embodiment, the jacket body 10 is formed of a thermoplastic resin. Thereby, the liquid cooling jacket P has been reduced in weight and is easy to handle.

  A step surface 15 is formed on the opening peripheral edge portion 12 a of the recess 11 of the jacket body 10 at a position one step down from the upper surface of the peripheral wall 14. The distance (depth) from the upper surface of the peripheral wall 14 to the step surface 15 is equal to the thickness dimension of the cover plate portion 31 of the sealing body 30 described later. On the step surface 15, the periphery of the cover plate portion 31 of the sealing body 30 is placed. The width W1 of the step surface 15 is preferably set to be as small as possible in order to secure the volume of the recess 11 through which the cooling water flows. However, in the present embodiment, the width W1 is larger than the outer diameter of the shoulder portion G1 of the friction stirring tool G. Largely formed.

  Through-holes 16 and 16 for circulating cooling water through the recess 11 are formed in a pair of wall portions 14a and 14a facing each other of the peripheral wall 14, respectively. In the present embodiment, the through-holes 16 and 16 extend in the opposing direction of the walls 14a and 14a (in the X-axis direction in FIG. 3), have a circular cross section, and are formed in the intermediate portion in the depth direction of the recess 11. Is formed. In addition, the shape and position of the through-hole 16 are not restricted to this, It can change suitably according to the kind and flow volume of cooling water.

  As shown in FIGS. 3 and 4, the sealing body 30 is a plate-like lid having a planar shape that is the same shape (square in this embodiment) as the opening 12 (see FIG. 3) of the recess 11 of the jacket body 10. It comprises a plate portion 31 and a plurality of fins 32, 32... Provided on the lower surface of the lid plate portion 31.

  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 FIG. 3, the fins 32, 32... Are arranged so as to extend in a direction (X-axis direction in FIG. 3) perpendicular to the wall portions 14a, 14a of the peripheral wall 14 in which the through holes 16, 16 are formed. ing. The fin 32 has a height (depth) dimension (length in the Z-axis direction in FIG. 3) equivalent to the depth dimension of the recess 11, and its tip end abuts against the bottom surface of the recess 11. It has become. Thus, in a state where the sealing body 30 is attached to the jacket body 10, a cylindrical space is partitioned by the cover plate portion 31 of the sealing body 30, the adjacent fins 32 and 32, and the bottom surface of the recess 11. The space functions as a flow path 33 (see FIG. 5A) through which cooling water flows. Further, the fins 32, 32... Have a length dimension (length in the X-axis direction in FIG. 3) that is shorter than the length dimension of one side of the recess 11, and both ends of the fins 32, 32. Each of the wall portions 14a, 14a is configured to be spaced from the inner wall surface by a predetermined distance. Thus, in a state where the sealing body 30 is attached to the jacket main body 10, a space between the outer ends of the fins 32, 32... The flow path header portion 34 (see FIG. 5A) extending in the direction orthogonal to the extending direction of 32 (the Y-axis direction in FIG. 3) is configured.

  The sealing body 30 is formed from an aluminum alloy. The sealing body 30 is formed by cutting a block made of an aluminum alloy. The sealing body 30 may be appropriately selected from metal materials capable of friction stir, such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy, depending on the application.

  Next, a method for manufacturing the liquid cooling jacket P will be specifically described with reference to FIG. The manufacturing method of the liquid cooling jacket according to the present embodiment includes a placing step of placing the sealing body 30 on the jacket body 10 and a friction stirring step of performing friction stirring along the inside of the abutting portion 40.

  In the placing step, as shown in FIGS. 3 and 5A, the sealing body 30 is inserted into the recess 11 of the jacket body 10 with the fins 32 on the lower side, and the sealing body 30 is inserted. The lid plate portion 31 is placed on the step surface 15. Here, the opening peripheral part 12a of the recessed part 11 of the jacket main body 10 and the peripheral part 30a of the sealing body 30 are faced | matched, and the abutting part 40 is comprised.

  In the friction stirring step, the friction stirring rotary tool G is relatively moved along the inside of the abutting portion 40. That is, the lower surface (end surface) of the friction stir rotating tool G is opposed to the sealing body 30 and pressed by a predetermined pressing amount, and then the step surface 15 (see FIG. 3) of the jacket body 10 and the sealing body 30 are pressed. It moves along the overlap allowance with which the cover plate part 31 overlaps. 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 14 of the jacket body 10 so that the jacket body 10 does not move.

  In the friction stirring step, as shown in FIGS. 5A and 6, the insertion position (starting end 54 a) of the friction stirring rotary tool G is set inside the abutting portion 40. Then, with the rotation center Q of the friction stirring rotary tool G overlapped with the center of the step surface 15 in the width direction, the lid plate portion 31 is friction stirred while moving the friction stirring rotary tool G.

  Thereafter, the rotation and movement of the friction stirring rotary tool G is continued, and as shown in FIG. 5B, the friction stirring rotary tool G is rotated around the opening 12 to form the plasticized region W. . At this time, the start end 54a (see FIG. 5A) and the end 54b (see FIG. 5B) of the friction stir rotating tool G overlap, and a part of the plasticizing region W overlaps. Is configured to do.

  As described above, the rotating tool G for friction stirring is rotated around the inside of the abutting portion 40 (see FIG. 5A) to perform friction stirring, and the sealing body 30 is fixed to the jacket body 10. A liquid cooling jacket P is formed.

  According to the manufacturing method of the liquid cooling jacket P according to the present embodiment, the resin related to the jacket main body 10 is melted by the frictional heat by the frictional stirring with respect to the aluminum alloy sealing body 30, and is cured again. At this time, the sealing body 30 is welded and firmly joined. That is, the jacket body 10 and the sealing body 30 can be joined simply by pressing and rotating the friction stir rotating tool G, so that the liquid cooling jacket P can be easily manufactured. Moreover, by rotating the friction stirring rotary tool G along the circumference of the sealing body 30, it is possible to increase the bonding strength and to improve the bonding workability. Further, even if the pressing amount is such that the plasticized region W does not contact the stepped surface 15, the bonding can be performed.

  In addition, it is preferable to set the outer diameter of the shoulder part G1 of the rotary tool G for friction stirring to 2 to 5 times the thickness of the cover plate part 31 of the sealing body 30. Further, the pressing amount (the pressing length from the upper surface of the lid plate portion 31 to the lower surface of the shoulder portion G1) of the rotary tool G for friction stirring is set to 5% to 20% of the thickness of the lid plate portion 31 of the sealing body 30. It is preferable to set. By setting the outer diameter of the shoulder part G1 or the pressing amount of the friction stirring rotary tool G in this way, the bonding strength can be increased. The reason will be described later.

  Moreover, before performing a friction stirring process, you may perform an above-mentioned etching process or alumite process to the surface which contacts the level | step difference surface 15 of the jacket main body 10 among the cover board parts 31 of the sealing body 30. FIG. By forming the surface of the sealing body 30 made of an aluminum alloy so as to be uneven, the melted resin enters the concave portion, so that the contact area is increased and a stronger bond can be achieved.

  In the present embodiment, the jacket body 10 is provided with the step surface 15 and the sealing body 30 is placed on the step surface 15. However, the present invention is not limited to this. For example, as shown in FIG. 7, the cover plate portion 31 of the sealing body 30 is placed on the upper surface of the peripheral wall 14 of the jacket body 10, and the sealing body 30 is disposed along the overlapping margin of the peripheral wall 14 and the cover plate portion 31. The friction stirring step may be performed by relatively moving the friction stirring rotary tool G from above.

[Third embodiment]
Next, a third embodiment of the present invention will be described. In 1st embodiment and 2nd embodiment, although the friction stirring process was performed and the resin member 2 and the metal member 3 were joined using the rotation tool G for friction stirring, in 3rd embodiment, the rotation tool F is used. It differs from 1st embodiment and 2nd embodiment by the point which uses and performs a friction process.

  The joining method according to the present embodiment includes a superposing step of superposing the resin member 2 and the metal member 3 and a friction step of performing frictional joining on the superposed members. Since the overlapping process is the same as that of the first embodiment, the description thereof is omitted.

  In the friction process, as shown in FIG. 8, friction bonding is performed on the resin member 2 and the metal member 3 (aluminum alloy member 3) using a rotary tool F (hereinafter also referred to as a friction welding rotary tool F).

  The friction welding rotary tool F includes a rotary shaft F1 and a tool main body F2 provided at the tip of the rotary shaft F1. The rotation shaft F1 and the tool body F2 are formed coaxially. The proximal end side of the rotation shaft F1 is connected to a drive device (not shown). The tool main body F2 rotates at high speed around the axis when the drive of the driving device is transmitted via the rotation axis F1. The tool body F2 has a disk shape and is made of a metal material harder than an aluminum alloy such as tool steel.

  The shape, size, etc. of the friction welding rotary tool F may be appropriately set according to the members to be joined. In this embodiment, for example, the tool body F2 has a diameter of 100 mm and the peripheral surface F3 has a width of 4 mm. The thing was adopted. Further, the pushing amount, rotation speed, and joining speed (feeding speed) of the friction welding rotary tool F may be appropriately set according to the members to be joined. In this embodiment, for example, the pushing amount is 0.2 mm, The number of revolutions was set to 3000 rpm, and the joining speed was set to 500 to 1500 mm / min.

  In the friction process, after the resin member 2 and the aluminum alloy member 3 are restrained so as not to move, the peripheral surface F3 of the tool body F2 is rotated to a predetermined depth on the upper surface of the aluminum alloy member 3 while rotating the friction welding rotary tool F. Is pushed (pressed) and moved along the overlap margin of the resin member 2 and the aluminum alloy member 3. According to the friction welding, the surface of the resin member 2 is melted by the frictional heat between the friction welding rotary tool F and the aluminum alloy member 3, and when the resin member 2 is hardened again, it is welded and firmly joined to the aluminum alloy member 3.

  Also by the joining method according to the third embodiment, substantially the same effect as that of the first embodiment can be obtained. Moreover, since it can join by a small pressing force compared with 1st embodiment in a friction process, it is suitable when the member to join is thin.

  In the third embodiment, the surface of the aluminum alloy member 3 that is in contact with at least the resin member 2 is subjected to etching treatment or anodizing (anodization) treatment, and the contact surface is formed to be uneven. You may perform a process. In the third embodiment, the case where the plate-like resin member 2 and the aluminum alloy member 3 are joined is described as an example. However, the present invention is not limited to this. For example, as described in the second embodiment, when manufacturing a liquid cooling jacket, a friction process may be performed instead of the friction stirring process.

  Examples 1 to 3 using the rotating tool G for friction stirring and Example 4 using the rotating tool F for friction welding were performed.

  FIG. 9 is a perspective view for explaining the first to third embodiments. In Example 1 to Example 3, as shown in FIG. 9, after the plate-like resin member 2 and the plate-like aluminum alloy member 3 are overlapped, the aluminum alloy member 3 is positioned above the overlap allowance. The rotary tool G for friction stirring was pressed in a spot manner, and the fracture strength of the composite member 1 joined by frictional heat was measured. The breaking strength is measured by installing the composite member 1 shown in FIG. 9 in a known tensile testing machine, pulling the outer end of the resin member 2 and the outer end of the aluminum alloy member 3 in directions away from each other, and breaking. did.

  The resin member 2 in Examples 1 to 3 is made of PET, and is formed with a length of 100 mm, a width of 30 mm, and a thickness of 3 mm. On the other hand, the aluminum alloy member 3 is formed with a length of 100 mm, a width of 30 mm, and a thickness of 3 mm or 5 mm. The overlap margin of the resin member 2 and the aluminum alloy member 3 is 30 mm.

  In Example 1, in order to derive the optimum indentation amount of the friction stir rotating tool G, the fracture strength when joining with a predetermined indentation amount under the six kinds of conditions of Test 1-a to Test 1-f ( Tensile strength) was measured. Table 1 shows the conditions of each test.

  In Test 1-a to Test 1-f, the results of the fracture strength at a predetermined indentation amount are shown in Table 2. In addition, the judgment column in Table 2, Table 4 and Table 6 indicates that “x” is not joined, “△” is joined but the tensile strength is weak, and “◯” is sufficient tensile strength. .

As shown in Table 2, when the results of Test 1-a and Test 1-b are seen, if the indentation amount is 0.2 mm or more, the fracture strength is 3000 N or more, but the indentation amount is 0.05 mm or less. Since the pressing amount is too shallow and the surface layer portion of the resin member 2 does not melt, it is not joined. Further, it was found that when the push-in amount is 0.1 mm, the aluminum alloy member 3 is not joined when the plate thickness is 5 mm, and when the plate thickness is 3 mm, it is joined but the breaking strength is small. When the pressing amount is 0.2 mm, the ratio of the aluminum alloy member 3 to the plate thickness is 6.7% when the plate thickness is 3 mm, and 4% when the plate thickness is 5 mm.
Further, when the test 1-c, the test 1-d, the test 1-e, and the test 1-f are seen, the results are almost the same as those of the test 1-a and the test 1-b. It was found that there was no effect on the fracture strength depending on the type.

As described above, even if the pressing amount of the friction stirring rotary tool G is set to be smaller than 5% of the thickness of the aluminum alloy member 3, the resin member 2 and the aluminum alloy member 3 can be joined. In order to obtain a sufficient tensile strength, it is desirable to set the pressing amount of the friction stirring tool G to 5% or more of the thickness of the aluminum alloy member 3.
On the other hand, if the pushing amount of the friction stir rotating tool G is set large, the plasticized region formed by the friction stir may come into contact with the resin member 2 and the metal and the resin may be mixed. Further, when the pressing amount of the friction stirring tool G is set large, an overload acts on the friction stirring device. Therefore, in consideration of these, it is desirable to set the pressing amount of the friction stirring rotary tool G to 20% or less of the plate thickness of the aluminum alloy member 3.

  In Example 2, in order to derive the optimum outer diameter of the shoulder portion G1 (see FIG. 2) of the rotary tool G for friction stir, a predetermined shoulder is used under two conditions of Test 2-a to Test 2-b. The fracture strength (tensile strength) was measured when joining was performed with the rotating tool G for friction stirrer having the outer diameter of the part G1. Table 3 shows the conditions of each test.

  Table 4 shows the results of the breaking strength at the outer diameter of the predetermined shoulder portion in Test 2-a and Test 2-b.

As shown in Table 4, in Test 2-a, when the outer diameter of the shoulder portion is larger than φ10.0 mm, the breaking strength is 3000 N or more, but when it is φ7.5 mm or less, the breaking strength is remarkably lowered.
On the other hand, in Test 2-b, when the outer diameter of the shoulder portion is φ7.5 mm or more, the breaking strength is 3000 N or more, but when it is φ5.0 mm or less, the breaking strength is remarkably lowered.
From the above, even if the outer diameter of the shoulder portion G1 of the rotating tool G for friction stirring is set to be smaller than twice the plate thickness of the aluminum alloy member 3, the resin member 2 and the aluminum alloy member 3 are joined. Although it is possible, in order to obtain sufficient tensile strength, it is desirable that the outer diameter of the shoulder portion G1 of the rotating tool G for friction stirrer is at least twice the plate thickness of the aluminum alloy member 3. Even if the outer diameter of the shoulder portion G1 is larger than 5 times the plate thickness of the aluminum alloy member 3, the strength does not change. Therefore, considering the load on the friction stirrer, the outer diameter of the shoulder portion G1 is It is desirable to set it to 5 times or less the plate thickness of the aluminum alloy member 3.

  In Example 3, a test was conducted on the relationship with the fracture strength when the surface of the aluminum alloy member 3 was formed to be uneven. The fracture strength (tensile strength) in the case of joining after performing a predetermined treatment on the surface of the aluminum alloy member 3 under the three types of conditions of Test 3-a to Test 3-c was measured. Table 5 shows the conditions of each test.

Table 6 shows the results of the fracture strength in each surface treatment of the aluminum alloy member 3 in Test 3-a to Test 3-c.
Of the surface treatments applied to the aluminum alloy member 3 in Table 6, “no treatment” indicates that the aluminum alloy member 3 is not subjected to surface treatment.

  In “etching A”, the following pre-etching treatment and main etching treatment are performed. In the pre-etching treatment, first, the aluminum alloy member 3 is immersed in a 30 wt% nitric acid solution at room temperature for 5 minutes, then thoroughly washed with ion-exchanged water, and then immersed in a 5 wt% sodium hydroxide solution at 50 ° C. for 1 minute. Then, it is washed with water, and further immersed in a 30 wt% nitric acid solution at room temperature for 3 minutes, and then washed with water.

  In this etching process, the aluminum alloy member 3 subjected to the pre-etching process is prepared in an etching solution (chlorine ion concentration: 48 g / L) prepared by adding 54 g / L of aluminum chloride hexahydrate to a 25 wt% hydrochloric acid solution. The sample was immersed in 66 ° C. for 4 minutes and then washed with water, further immersed in a 30 wt% nitric acid solution at room temperature for 3 minutes, washed with water, and dried with hot air at 120 ° C. for 5 minutes.

  In “etching B”, the main etching process shown below is performed after the above-described pre-etching process. That is, in this etching main treatment, the aluminum alloy member 3 after the pre-etching treatment was immersed in a 50 wt% phosphoric acid solution at 66 ° C. for 4 minutes, washed with water, and then dried with hot air at 120 ° C. for 5 minutes. .

  In “no alumite sealing”, the following alumite pretreatment and alumite main treatment are performed. In the alumite pretreatment, the aluminum alloy member 3 is first immersed in a 30 wt% nitric acid solution at room temperature for 5 minutes, then thoroughly washed with ion-exchanged water, and then immersed in a 5 wt% sodium hydroxide solution at 50 ° C. for 1 minute. Then, it is washed with water, and further immersed in a 30 wt% nitric acid solution at room temperature for 3 minutes, and then washed with water.

  In the main anodizing treatment, the aluminum alloy member 3 after the anodizing pretreatment is anodized in a solution having a sulfuric acid concentration of 160 g / L to a liquid temperature of 18 ° C. and a film thickness of 10 μm, and then washed with water to 120 ° C. For 5 minutes.

  In the case of “with alumite sealing”, the alumite main treatment is performed after the alumite pretreatment. Further, it is boiled for 10 minutes in boiling water. As a result, in “with anodized pores”, the pores are narrowed by the sealing treatment.

  Moreover, in the “wire brush”, the surface of the aluminum alloy member 3 was roughly cut by using a known wire brush and processed to be uneven.

As shown in Table 6, when the results of Test 3-a and Test 3-b were viewed, it was found that the surface treatment was performed such that the surface of the aluminum alloy member 3 was uneven, and the tensile strength was higher. . It was also found that sufficient tensile strength was obtained even when the aluminum alloy member 3 was not subjected to surface treatment.
Further, when the results of Test 3-c in which the outer diameter of the shoulder portion of the friction stir rotating tool G is reduced while the plate thickness of the aluminum alloy member 3 is reduced, “etching A”, “etching B” and “ It was found that a high tensile strength was obtained when the surface treatment of “no alumite sealing” was performed.

  In Example 4, the fracture strength of the joined members in the joining method described in the third embodiment (see FIG. 8) was measured. The breaking strength was measured by placing the joined members on a tensile testing machine, pulling the outer end of the resin member 2 and the outer end of the aluminum alloy member 3 in directions away from each other, and breaking.

  The resin member 2 in Example 4 is made of PET and has a thickness of 5 mm. The aluminum alloy member 3 is an 1100 alloy and has a thickness of 1 mm or 2 mm. The overlap margin of the resin member 2 and the aluminum alloy member 3 is 30 mm.

  As the rotary tool F for friction welding, two types of tools, a tool A having a tool body F2 with a diameter of 100 mm and a width of 4 mm, and a tool B with a tool body F2 having a diameter of 105 mm and a width of 10 mm, were employed. For tool A, the rotation speed was set to 3000 rpm, and for tool B, the rotation speed was set to 2857 rpm. For both Tool A and Tool B, the peripheral speed was set to 942000 (mm / min).

  In Example 4, three types of preconditions (Test 4 to Test 6) were set by changing the thickness of each member and the combination of rotating tools, and a destructive test was performed using the indentation amount and the joining speed (feed speed) as parameters. It was.

  The results of Test 4 are shown in Table 7.

  The results of Test 5 are shown in Table 8.

  From Tables 7 and 8, both the tool A and the tool B had low bonding strength when the indentation amount was 0.2 mm, and high bonding strength when the indentation amount was 0.4 mm. When the joining speed was 500 mm / min, the resin member 2 was broken. The bonding speed was sufficient up to 1500 mm / min, but the bonding strength was low at 2000 mm / min.

  On the other hand, in order to see the influence of the plate thickness of the aluminum alloy member 3, Table 9 shows the results of Test 6 in which the thickness of the aluminum alloy member 3 is 1 mm.

  As shown in Table 9, even when the plate thickness of the aluminum alloy member 3 was 1 mm, a result substantially equivalent to that obtained when the plate thickness was 2 mm (see Table 5) was obtained.

DESCRIPTION OF SYMBOLS 1 Composite member 2 Resin member 3 Metal member (aluminum alloy member)
10 Jacket body (resin member)
DESCRIPTION OF SYMBOLS 11 Concave part 12 Opening part 12a Opening peripheral part 14 Perimeter wall 15 Level | step difference surface 30 Sealing body (aluminum alloy member)
30a Peripheral part 31 Cover plate part 32 Fin F Rotary tool (Friction welding rotary tool)
G Rotating tool (Rotating tool for friction stirring)
P Liquid cooling jacket

Claims (2)

Made of aluminum or aluminum alloy that seals the opening of the recess to the jacket body made of thermoplastic resin having a recess that is partially opened while a heat transport fluid that transports heat generated by the heat generator flows to the outside A liquid cooling jacket to which the sealing body of
The jacket body made of thermoplastic resin includes a bottom wall and a peripheral wall,
The sealing body includes a lid plate portion, and a plurality of fins formed on the lid plate portion and extending toward the concave portion,
A stepped surface is formed at the opening peripheral edge of the recess of the jacket body made of thermoplastic resin at a position one step down from the peripheral wall, and the stepped surface and the peripheral edge of the lid plate portion of the sealing body Are joined,
A cylindrical space is defined in the recess by the bottom surface of the recess and the plurality of fins of the jacket body made of thermoplastic resin , and the space functions as a flow path through which cooling water flows .
The liquid cooling jacket, wherein the sealing body has the thermoplastic resin in a concave and convex portion formed on a contact surface with the jacket body made of thermoplastic resin. Made of aluminum or aluminum alloy that seals the opening of the recess to the jacket body made of thermoplastic resin having a recess that is partially opened while a heat transport fluid that transports heat generated by the heat generator flows to the outside A liquid cooling jacket to which the sealing body of
The jacket body made of thermoplastic resin includes a bottom wall and a peripheral wall,
The sealing body includes a lid plate portion, and a plurality of fins formed on the lid plate portion and extending toward the concave portion,
A stepped surface is formed at the opening peripheral edge of the recess of the jacket body made of thermoplastic resin at a position one step down from the peripheral wall, and the stepped surface and the peripheral edge of the lid plate portion of the sealing body Are joined,
A cylindrical space is defined in the recess by the bottom surface of the recess and the plurality of fins of the jacket body made of thermoplastic resin , and the space functions as a flow path through which cooling water flows .
The sealing body has an anodized film formed on a contact surface with the jacket body made of a thermoplastic resin, and the thermoplastic resin has entered the concave and convex portions formed on the anodized film. Liquid-cooled jacket characterized by

Images