JP2019076948A - Method for manufacturing liquid-cooled jacket - Google Patents

Abstract

To provide a method for manufacturing a liquid-cooled jacket in which aluminium alloy made of different materials can be preferably joined to each other.SOLUTION: A method for manufacturing a liquid-cooled jacket that is constituted of a jacket main body 2 and a sealing body 3 which comprises a hole part 4 into which a tip of a support post 15 is inserted and seals an opening part of the jacket main body 2, in which the jacket main body 2 is jointed to the sealing body 3 by friction stir, includes: a first normal joining step of inserting only a rotating stirring pin into the sealing body 3 and performing friction stir by circling a rotary tool around a first butting part J1 while contacting only the stirring pin with the sealing body 3; and a second normal joining step of inserting only the rotating stirring pin into the sealing body 3 and performing friction stir by circling the rotary tool around a third butting part J3 while slightly contacting the stirring pin with an uneven side 17b of a support post uneven part 17.SELECTED DRAWING: Figure 2

Description

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

  For example, Patent Document 1 discloses a method of manufacturing a liquid cooling jacket. FIG. 21 is a cross-sectional view showing a method of manufacturing a conventional liquid cooling jacket. In the conventional method of manufacturing a liquid cooling jacket, a butt portion J10 formed by butting the step side surface 101c provided on the step portion of the aluminum alloy jacket body 101 with the side surface 102c of the aluminum alloy sealing body 102. Against friction stir welding. Further, in the conventional method of manufacturing a liquid cooling jacket, friction stir welding is performed by inserting only the stirring pin F2 of the rotary tool F into the butt portion J10. Moreover, in the manufacturing method of the conventional liquid cooling jacket, the rotation center axis C of the rotation tool F is accumulated on the butt joint part J10, and is relatively moved.

JP, 2015-131321, A

  Here, the jacket main body 101 tends to have a complicated shape, for example, is formed of a cast material of a 4000 series aluminum alloy, and a relatively simple shape such as the sealing body 102 is a drawn material of a 1000 series aluminum alloy There are cases where it is formed by As described above, members having different aluminum alloy grades may be joined to produce a liquid-cooled jacket. In such a case, the hardness of the jacket main body 101 is generally higher than that of the sealing body 102. Therefore, when friction stir welding is performed as shown in FIG. The material resistance received from the jacket main body 101 side is larger than the material resistance received from the side. Therefore, it becomes difficult to agitate different material types with good balance by the stirring pin of the rotary tool F, and there is a problem that a cavity defect occurs in the plasticized area after bonding, and the bonding strength is lowered.

  From such a point of view, an object of the present invention is to provide a method of manufacturing a liquid-cooled jacket capable of suitably bonding aluminum alloys of different grades.

  In order to solve the above problems, the present invention comprises a bottom portion, a jacket body having a peripheral wall portion rising from the periphery of the bottom portion, and a support body having a support rising from the bottom, and a hole for inserting the tip of the support And a sealing body for sealing the opening of the housing, wherein the jacket main body and the sealing body are joined by friction stirring, and the jacket main body is formed of a first aluminum alloy. The sealing body is formed of a second aluminum alloy, the first aluminum alloy is a grade higher in hardness than the second aluminum alloy, and the outer peripheral surface of the stirring pin of the rotary tool is tapered The inner peripheral edge of the peripheral wall portion, and the bottom surface of the step, and the diagonally rising so as to extend outward from the bottom surface of the step toward the opening portion. Forming a peripheral step portion having a stepped side surface, and forming a column stepped portion having a stepped bottom surface and a stepped side surface rising from the stepped bottom surface at a tip end of the column; By placing the sealing body on the side wall of the peripheral wall step portion to abut the outer peripheral side surface of the sealing body to form a first abutment portion, and the bottom surface of the step surface of the peripheral wall step portion and the sealing A second butt portion is formed by overlapping the back surface of the stopper, and the third butt portion is formed by butting the step side surface of the step portion of the support with the hole wall of the hole of the sealing body. A mounting step of forming a fourth abutment portion by superposing the bottom surface of the stepped portion of the supporting column and the back surface of the sealing body, and inserting only the stirring pin to be rotated into the sealing body; Only contact the seal In the closed state, the first main joining step of frictionally stirring by rotating the rotating tool around the first abutting portion, inserting only the rotating stirring pin into the sealing body, and inserting the stirring pin And a second main joining step of frictionally agitating the rotary tool around the third abutment portion in a state of being slightly in contact with the step side surface of the column step portion.

  According to this manufacturing method, the second aluminum alloy mainly on the sealing body side of the first abutting portion is stirred and plasticized by the frictional heat of the sealing body and the stirring pin, and the step side surface and the sealing are performed in the first abutting portion. It can be joined to the outer peripheral side of the body. In addition, since only the stirring pin is brought into contact with only the sealing body to perform friction stirring, there is almost no mixing of the first aluminum alloy from the jacket main body to the sealing body. Also, at the third abutment portion, only the stirring pin is slightly brought into contact with the side surface of the step. As a result, since the second aluminum alloy on the sealing body side is mainly friction-stirred in the first butted portion and the third butted portion, it is possible to suppress a decrease in bonding strength. In addition, since the step side surface of the jacket main body is inclined outward, the contact between the stirring pin and the jacket main body can be easily avoided without causing a decrease in the joint strength. In addition, the strength of the liquid cooling jacket can be enhanced by joining the support and the sealing body.

  Further, in the second main joining step, the rotary tool is rotated along the third butting portion in a state where the agitating pin is slightly in contact with the step bottom of the step portion of the support, and friction stirring is performed. Is preferred.

  According to this manufacturing method, only the stirring pin is kept in slight contact with the bottom of the step at the fourth abutting portion. As a result, the aluminum alloy on the sealing body side is mainly friction-stirred at the fourth butted portion, so that it is possible to prevent a decrease in bonding strength. Further, the friction strength can be further enhanced by frictionally stirring the fourth butted portion.

  Further, according to the present invention, there is provided a bottom body, a jacket body having a peripheral wall portion rising from the peripheral edge of the bottom portion, and a column body having a column rising from the bottom portion, and a hole into which the tip of the column is inserted A method of manufacturing a liquid-cooled jacket comprising the sealing body and the sealing body joined by friction stirring, the jacket body being formed of a first aluminum alloy, the sealing body The stopper is formed of a second aluminum alloy, the first aluminum alloy is a grade having a hardness higher than that of the second aluminum alloy, and the outer peripheral surface of the stirring pin of the rotary tool is inclined to be tapered. The inner peripheral edge of the peripheral wall portion, a step bottom surface, and a step side surface rising obliquely from the step bottom surface so as to extend outward toward the opening portion; Forming the circumferential wall step portion and forming the support step portion having the step bottom surface and the step side surface rising from the step bottom at the tip of the support, and mounting the sealing body on the jacket main body By placing the step, the step side surface of the peripheral wall step portion and the outer peripheral side surface of the sealing body are butted to form a first abutment portion, and the step bottom surface of the peripheral wall step portion and the back surface of the sealing body are overlapped. In addition, a second abutment portion is formed, and further, a side surface of the stepped portion of the support pillar portion and a hole wall of the hole portion of the sealing body are butted to form a third abutment portion, and the stepped portion of the support pillar stepped portion A mounting step of forming a fourth butt portion by superposing the bottom surface and the back surface of the sealing body, inserting only the rotating stirring pin into the sealing body, and inserting the stirring pin on the stepped side surface of the peripheral wall portion Slightly in contact with A first main joining step of frictionally stirring by rotating the rotary tool around the first abutment portion, and inserting only the rotating stirring pin into the sealing body, the stirring pin being the step difference of the column And a second main joining step of frictionally agitating the rotary tool along the third abutment portion while slightly contacting the step side surface of the portion.

  According to this manufacturing method, since the outer peripheral surface of the stirring pin is kept in slight contact with the step side surface of the jacket main body, the mixing of the first aluminum alloy from the jacket main body to the sealing body can be minimized. Further, also in the third abutting portion, since the stirring pin is kept in slight contact with the side surface of the step, the mixing of the first aluminum alloy from the jacket main body to the sealing body can be minimized. As a result, since the second aluminum alloy on the sealing body side is mainly friction-stirred in the first butted portion and the third butted portion, it is possible to suppress a decrease in bonding strength. In addition, since the step side surface of the jacket main body is inclined outward, it is possible to join the first abutment portion without the stirring pin largely invading the jacket main body side. In addition, the strength of the liquid cooling jacket can be enhanced by joining the support and the sealing body.

  Further, in the first main joining step, the rotary tool is rotated along the first butting portion in a state where the stirring pin is slightly in contact with the bottom of the stepped portion of the peripheral wall step to perform friction stirring. Is preferred.

  According to this manufacturing method, only the stirring pin is kept in slight contact with the bottom of the step at the second abutment portion. As a result, the second aluminum alloy on the sealing body side is mainly friction-stirred at the second abutting portion, so that it is possible to prevent a decrease in bonding strength. In addition, the joint strength can be further enhanced by frictionally stirring the second abutment portion.

  Further, in the second main joining step, the rotary tool is rotated along the third butting portion in a state where the agitating pin is slightly in contact with the step bottom of the step portion of the support, and friction stirring is performed. Is preferred.

  According to this manufacturing method, only the stirring pin is kept in slight contact with the bottom of the step at the fourth abutting portion. As a result, the second aluminum alloy on the sealing body side is mainly friction-stirred at the fourth butted portion, so that it is possible to prevent a decrease in bonding strength. Further, the friction strength can be further enhanced by frictionally stirring the fourth butted portion.

  In the preparing step, the jacket body may be formed by die casting and the bottom portion may be formed to be convex on the surface side, and the sealing body may be formed to be convex on the surface side. preferable.

  Although heat shrinkage occurs in the plasticized area due to heat input in friction stir welding, and there is a risk that the liquid-cooled jacket will be deformed so as to be concave on the sealing body side. According to such a manufacturing method, the jacket main body and sealing body Can be made flat beforehand by utilizing heat contraction.

  Further, the deformation amount of the jacket main body is measured in advance, and in the first main bonding step and the second main bonding step, while adjusting the insertion depth of the stirring pin of the rotary tool according to the deformation amount. It is preferable to carry out frictional stirring.

  According to this manufacturing method, even when friction stir welding is performed by curving the jacket main body and the sealing body in a convex shape, the length and width of the plasticized region formed in the liquid cooling jacket can be made constant. it can.

  In addition, it is preferable to include a temporary bonding step of temporarily bonding at least one of the first butting portion and the third butting portion prior to the first main bonding step and the second main bonding step.

  According to this manufacturing method, by performing temporary bonding, it is possible to prevent the openings of the butted portions in the first main bonding step and the second main bonding step.

  Further, in the first main bonding step and the second main bonding step, a cooling plate through which a cooling medium flows is disposed on the back side of the bottom portion, and friction is performed while cooling the jacket main body and the sealing body by the cooling plate. Preferably, stirring is performed.

  According to this manufacturing method, since the frictional heat can be suppressed to a low level, the deformation of the liquid cooling jacket due to the thermal contraction can be reduced.

  Moreover, it is preferable to make surface contact of the surface of the said cooling plate and the back surface of the said bottom part. According to this manufacturing method, the cooling efficiency can be enhanced.

  Moreover, it is preferable that the said cooling plate has a cooling flow path through which the said cooling medium flows, and the said cooling flow path is provided with the planar shape in alignment with the movement trace of the said rotation tool in the said 1st main joining process.

  According to this manufacturing method, since the portion to be frictionally stirred can be intensively cooled, the cooling efficiency can be further enhanced.

  Moreover, it is preferable that the cooling flow path through which the cooling medium flows is configured by a cooling pipe embedded in the cooling plate. According to this manufacturing method, the cooling medium can be easily managed.

  Further, in the first main bonding step and the second main bonding step, a cooling medium is caused to flow through the hollow portion formed by the jacket main body and the sealing body to cool the jacket main body and the sealing body. It is preferable to carry out frictional stirring.

  According to this manufacturing method, since the frictional heat can be suppressed to a low level, the deformation of the liquid cooling jacket due to the thermal contraction can be reduced. In addition, cooling can be performed using the jacket body itself without using a cooling plate or the like.

  According to the method of manufacturing a liquid cooling jacket according to the present invention, aluminum alloys different in grade can be suitably joined.

It is a perspective view which shows the preparatory process of the manufacturing method of the liquid cooling jacket which concerns on 1st embodiment of this invention. It is sectional drawing which shows the mounting process of the manufacturing method of the liquid cooling jacket which concerns on 1st embodiment. It is a perspective view which shows the 1st main joining process of the manufacturing method of the liquid cooling jacket which concerns on 1st embodiment. It is sectional drawing which shows the 1st main joining process of the manufacturing method of the liquid cooling jacket which concerns on 1st embodiment. It is sectional drawing which shows after the 1st main joining process of the manufacturing method to the liquid cooling jacket which concerns on 1st embodiment. It is a perspective view which shows the 2nd main joining process of the manufacturing method of the liquid cooling jacket which concerns on 1st embodiment. It is sectional drawing which shows the 2nd main joining process of the manufacturing method of the liquid cooling jacket which concerns on 1st embodiment. It is sectional drawing which shows the mounting process of the manufacturing method of the liquid cooling jacket which concerns on the 1st modification of 1st embodiment. It is sectional drawing which shows the mounting process of the manufacturing method of the liquid cooling jacket which concerns on the 2nd modification of 1st embodiment. It is sectional drawing which shows the 1st main joining process of the manufacturing method of the liquid cooling jacket which concerns on 2nd embodiment of this invention. It is sectional drawing which shows the 1st main joining process of the manufacturing method of the liquid cooling jacket which concerns on 3rd embodiment of this invention. It is sectional drawing which shows the 1st main joining process of the manufacturing method of the liquid cooling jacket which concerns on 4th embodiment of this invention. It is sectional drawing which shows the 1st main joining process of the manufacturing method of the liquid cooling jacket which concerns on the 1st modification of 4th embodiment. It is sectional drawing which shows the 2nd main joining process of the manufacturing method of the liquid cooling jacket which concerns on 5th embodiment of this invention. It is sectional drawing which shows the 2nd main joining process of the manufacturing method of the liquid cooling jacket which concerns on the 1st modification of 5th embodiment. It is sectional drawing which shows the 2nd main joining process of the manufacturing method of the liquid cooling jacket which concerns on 6th embodiment of this invention. It is a perspective view which shows the 3rd modification of the manufacturing method of the liquid cooling jacket which concerns on 1st embodiment. It is a figure which shows the 4th modification of the manufacturing method of the liquid cooling jacket which concerns on 1st embodiment, Comprising: (a) is a perspective view which shows a table, (b) fixes a jacket main body and a sealing body to a table It is a perspective view which shows the state which was carried out. It is a disassembled perspective view which shows the 5th modification of the manufacturing method of the liquid cooling jacket which concerns on 1st embodiment. It is a perspective view which shows the state which fixes the jacket main body and sealing body of the 5th modification of the manufacturing method of the liquid cooling jacket which concerns on 1st embodiment to a table. It is sectional drawing which shows the manufacturing method of the conventional liquid cooling jacket.

First Embodiment
A method of manufacturing a liquid cooling jacket according to an embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the liquid-cooled jacket 1 is manufactured by friction stir welding of the jacket main body 2 and the sealing body 3. The liquid cooling jacket 1 is a member in which a heating element (not shown) is placed on the sealing body 3 and a fluid is allowed to flow inside to exchange heat with the heating element. In the following description, "surface" means a surface opposite to "back side".

  The manufacturing method of the liquid cooling jacket which concerns on this embodiment performs a preparatory process, a mounting process, a 1st main joining process, and a 2nd main joining process. The preparation step is a step of preparing the jacket body 2 and the sealing body 3. The jacket main body 2 is mainly configured by a bottom portion 10, a peripheral wall portion 11, and a plurality of support columns 15. The jacket body 2 is formed mainly including the first aluminum alloy. As the first aluminum alloy, for example, an aluminum alloy cast material such as JISH5302 ADC12 (Al-Si-Cu system) is used.

  As shown in FIG. 1, the bottom portion 10 is a plate-like member exhibiting a rectangular shape in a plan view. The peripheral wall portion 11 is a wall portion rising from the peripheral portion of the bottom portion 10 in a rectangular frame shape. A circumferential wall stepped portion 12 is formed on the inner peripheral edge of the circumferential wall portion 11. The peripheral wall stepped portion 12 is configured of a stepped bottom surface 12 a and a stepped side surface 12 b rising from the stepped bottom surface 12 a. As shown in FIG. 2, the stepped side surface 12 b is inclined so as to extend outward from the stepped bottom surface 12 a toward the opening. The inclination angle β of the stepped side surface 12b may be set as appropriate, but is, for example, 3 ° to 30 ° with respect to the vertical surface. A recess 13 is formed by the bottom portion 10 and the peripheral wall portion 11.

  As shown in FIG. 1, the columns 15 stand vertically from the bottom 10. The number of columns 15 is not particularly limited, but four are formed in the present embodiment. Moreover, although the shape of the support | pillar 15 is cylindrical shape in this embodiment, another shape may be sufficient. A protrusion 16 is formed at the tip of the support 15. The shape of the protrusion 16 is not particularly limited, but in the present embodiment, it is cylindrical. The height of the protrusion 16 is the same as the thickness of the sealing body 3. A support step portion 17 is formed by the end face of the support 15 and the protrusion 16. The pillar step portion 17 is configured of a step bottom surface 17 a and a step side surface 17 b rising from the step bottom surface 17 a. The stepped bottom surface 17 a is formed at the same height as the stepped bottom surface 12 a of the peripheral wall stepped portion 12.

  The sealing body 3 is a plate-like member that seals the opening of the jacket body 2. The sealing body 3 is sized to be placed on the peripheral wall step portion 12. The plate thickness of the sealing body 3 is substantially equal to the height of the stepped side surface 12 b. A hole 4 is formed in the sealing body 3 at a position corresponding to the support 15. The hole 4 is formed so that the protrusion 16 can be fitted with almost no gap. The sealing body 3 is formed mainly including the second aluminum alloy. The second aluminum alloy is a material having a hardness lower than that of the first aluminum alloy. The second aluminum alloy is formed of, for example, an aluminum alloy wrought material such as JIS A1050, A1100, A6063 or the like.

  The placing step is a step of placing the sealing body 3 on the jacket main body 2 as shown in FIG. In the mounting step, the back surface 3b of the sealing body 3 is mounted on the bottom surface 12a of the step. The stepped side surface 12b and the outer peripheral side surface 3c of the sealing body 3 are butted to form a first abutting portion J1. The first abutment portion J1 has both a case where the step side surface 12b and the outer peripheral side surface 3c of the sealing body 3 are in surface contact, and a case where the V-shaped cross section is butted as in the present embodiment. May be included. Further, the step bottom surface 12a and the back surface 3b of the sealing body 3 are butted to form a second butted portion J2. In the present embodiment, when the sealing body 3 is placed, the end face 11 a of the peripheral wall portion 11 and the surface 3 a of the sealing body 3 become flush.

  Further, in the mounting step, the hole wall 4a of the hole 4 and the step side 17b of the pillar step portion 17 are butted to form the third abutment portion J3. Furthermore, the back surface 3b of the sealing body 3 and the stepped bottom surface 17a of the support stepped portion 17 are butted to form a fourth butted portion J4.

  As shown in FIGS. 3 and 4, the first main bonding step is a step of friction stir welding the first abutting portion J <b> 1 using a rotary tool F. The rotating tool F includes a connecting portion F1 and a stirring pin F2. The rotating tool F is formed of, for example, a tool steel. The connecting portion F1 is a portion connected to the rotation shaft of the friction stir device (not shown). The connecting portion F1 has a cylindrical shape, and a screw hole (not shown) in which a bolt is fastened is formed.

  The stirring pin F2 is suspended from the connecting portion F1 and is coaxial with the connecting portion F1. The stirring pin F2 is tapered as it separates from the connecting portion F1. As shown in FIG. 4, a flat surface F3 which is perpendicular to the rotation center axis C and flat is formed at the tip of the stirring pin F2. That is, the outer surface of the stirring pin F2 is constituted by the outer peripheral surface which becomes tapered and the flat surface F3 formed at the tip. When viewed from the side, the inclination angle α between the rotation center axis C and the outer peripheral surface of the stirring pin F2 may be set as appropriate, for example, in the range of 5 ° to 30 °. It is set so as to be the same as the inclination angle β of the step side surface 12b.

  A spiral groove is engraved on the outer peripheral surface of the stirring pin F2. In the present embodiment, in order to rotate the rotation tool F to the right, the spiral groove is formed in the counterclockwise direction from the proximal end toward the distal end. In other words, the spiral groove is formed counterclockwise as viewed from above when the spiral groove is traced from the proximal end to the distal end.

  In addition, when rotating the rotation tool F to the left, it is preferable to form a spiral groove rightward as it goes to a tip from a base end. In other words, the spiral groove in this case is formed clockwise as viewed from above when the spiral groove is traced from the proximal end to the distal end. By setting the spiral groove in this manner, the plastically fluidized metal is guided to the tip side of the stirring pin F2 by the spiral groove during friction stirring. Thereby, the quantity of the metal which overflows to the exterior of a to-be-joined metal member (jacket main body 2 and sealing body 3) can be decreased.

  As shown in FIG. 3, when friction stirring is performed using the rotary tool F, only the stirring pin F2 rotated right is inserted into the sealing body 3 and the sealing body 3 and the connecting portion F1 are separated. Move it. In other words, friction stirring is performed in a state where the base end of the stirring pin F2 is exposed. A plasticized region W1 is formed on the movement trajectory of the rotary tool F by hardening of the friction-stirred metal. In the present embodiment, the stirring pin F2 is inserted into the start position Sp set in the sealing body 3, and the rotation tool F is moved relative to the sealing body 3 around the right.

  As shown in FIG. 4, in the first main bonding step, only the stirring pin F2 is brought into contact with only the sealing body 3 to make a round along the first abutment portion J1. In the present embodiment, the insertion depth is set so that the flat surface F3 of the stirring pin F2 does not contact the jacket body 2 as well. The "state in which only the stirring pin F2 is in contact with only the sealing body 3" refers to a state in which the outer surface of the stirring pin F2 is not in contact with the jacket main body 2 while performing friction stirring. This can also include the case where the distance between the outer peripheral surface of the step and the step side surface 12b is zero, or the case where the distance between the flat surface F3 of the stirring pin F2 and the step bottom surface 12a is zero.

  If the distance from the stepped side surface 12b to the outer peripheral surface of the stirring pin F2 is too long, the bonding strength of the first abutting portion J1 is reduced. Although the separation distance L from the stepped side surface 12b to the outer peripheral surface of the stirring pin F2 may be appropriately set according to the materials of the jacket main body 2 and the sealing body 3, the outer peripheral surface of the stirring pin F2 is stepped side surface 12b as in this embodiment. In the case where the flat surface F3 is not in contact with the stepped bottom surface 12a, for example, it is preferable to set 0 ≦ L ≦ 0.5 mm, preferably 0 ≦ L ≦ 0.3 mm.

  When the rotary tool F is made to go around the sealing body 3, the start and end of the plasticized area W1 are overlapped. The rotating tool F may be gradually raised and withdrawn on the surface 3 a of the sealing body 3. FIG. 5 is a cross-sectional view of the bonding portion after the main bonding step according to the present embodiment. The plasticization area W1 is formed on the sealing body 3 side with the first abutting portion J1 as a boundary. Further, the flat surface F3 of the stirring pin F2 is not in contact with the bottom surface 12a of the step (see FIG. 4), and the plasticizing region W1 is formed to reach the jacket main body 2 beyond the second abutting portion J2.

  The second main joining step is a step of friction stir welding the third abutting portion J3 using the rotary tool F as shown in FIGS. 6 and 7. In the second main bonding step, as shown in FIG. 6, only the stirring pin F2 rotated right is inserted into the start position Sp set on the surface 3a of the sealing body 3, and the sealing body 3 and the connecting portion F1 are separated Move while moving. In other words, friction stirring is performed in a state where the base end of the stirring pin F2 is exposed. The plasticized region W2 is formed on the start-up trajectory of the rotary tool F by hardening the friction-stirred metal.

  In the second main joining step, as shown in FIG. 7, the outer circumferential surface of the agitating pin F2 is in contact with the stepped side surface 17b (projected portion 16) of the column stepped portion 17 along the third abutment portion J3. The rotation tool F is moved relatively. When the rotary tool F is made to go around the protrusion 16, the start and end of the plasticized area W2 are overlapped. The flat surface F3 of the stirring pin F2 is not in contact with the bottom surface 17a of the stepped portion, but the plasticized region W2 is formed to reach the fourth abutting portion J4.

  According to the method of manufacturing a liquid-cooled jacket according to the present embodiment described above, the stirring pin F2 of the rotating tool F and the step side surface 12b of the peripheral wall stepped portion 12 are not in contact with each other. The second aluminum alloy mainly on the side of the sealing body 3 of the first butt portion J1 is stirred and plasticized by friction heat with the first side butt portion 12b and the outer peripheral side surface 3c of the sealing body 3 in the first butt portion J1. Can be joined. Further, since only the stirring pin F2 is brought into contact with only the sealing body 3 to perform friction stirring, the mixing of the first aluminum alloy from the jacket main body 2 to the sealing body 3 is hardly caused. As a result, the second aluminum alloy on the side of the sealing body 3 is friction-stirred mainly in the first abutting portion J1, so that it is possible to suppress a decrease in bonding strength.

  Further, in the first main joining step, since the step side surface 12b of the jacket main body 2 is inclined outward, the contact between the stirring pin F2 and the jacket main body 2 can be easily avoided. Further, in this embodiment, since the inclination angle β of the step side surface 12b and the inclination angle α of the stirring pin F2 are the same (the step side surface 12b and the outer peripheral surface of the stirring pin F2 are parallel to each other), The stirring pin F2 and the stepped side surface 12b can be made as close as possible while avoiding contact with the stepped side surface 12b.

  In addition, in the first main joining step, only friction pin F2 is brought into contact with sealing body 3 alone to perform friction stir welding. Therefore, the stirring pin on one side and the other side with respect to rotation center axis C of stirring pin F2. It is possible to eliminate the material resistance imbalance that F2 receives. As a result, the plastic flow material is frictionally stirred in a well-balanced manner, so that it is possible to suppress a decrease in bonding strength.

  Further, in the first main joining process, the rotational direction and the advancing direction of the rotary tool F may be set appropriately, but the jacket main body 2 side becomes the shear side in the plasticization region W1 formed on the movement trajectory of the rotary tool F The rotation direction and the traveling direction of the rotation tool F were set such that the sealing body 3 side was the flow side. By setting the jacket main body 2 side to be a shear side, the stirring action by the stirring pin F2 around the first abutment portion J1 is enhanced, and a temperature rise in the first abutment portion J1 can be expected, and the first abutment portion J1 The stepped side surface 12 b and the outer peripheral side surface 3 c of the sealing body 3 can be joined more reliably.

  In addition, the shear side (Adancing side) means the side where the relative velocity of the outer periphery of the rotary tool to the part to be joined is a value obtained by adding the magnitude of the moving velocity to the size of the tangential velocity at the outer periphery of the rotary tool . On the other hand, the flow side (Retreating side) refers to the side where the relative speed of the rotating tool relative to the part to be joined becomes low by rotating the rotating tool in the direction opposite to the moving direction of the rotating tool.

  Further, the first aluminum alloy of the jacket body 2 is a material harder than the second aluminum alloy of the sealing body 3. Thereby, the durability of the liquid cooling jacket 1 can be enhanced. Further, it is preferable that the first aluminum alloy of the jacket main body 2 be an aluminum alloy cast material, and the second aluminum alloy of the sealing body 3 be an aluminum alloy wrought material. The castability, strength, machinability and the like of the jacket main body 2 can be enhanced by using, for example, an Al—Si—Cu based aluminum alloy cast material such as JISH 5302 ADC 12 as the first aluminum alloy. Moreover, processability and thermal conductivity can be improved by making a 2nd aluminum alloy into JIS A1000 type | system | group or A6000 type | system | group, for example.

  In the first butt portion J1, the flat surface F3 of the agitating pin F2 is not inserted deeper than the stepped bottom surface 12a in the present embodiment, but the joining is achieved by causing the plasticized region W1 to reach the second butt portion J2. The strength can be increased.

  Further, in the third abutment portion J3, only the stirring pin F2 is slightly brought into contact with the stepped side surface 17b (projected portion 16) of the column stepped portion 17. Thereby, in the third butting portion J3, mixing of the first aluminum alloy from the support column 15 of the jacket main body 2 to the sealing body 3 can be prevented as much as possible, and the second aluminum alloy mainly on the sealing body 3 side is Since friction stirring is performed, a decrease in bonding strength can be suppressed. Moreover, the strength of the liquid cooling jacket can be enhanced by joining the support 15 and the sealing body 3.

  Either of the first main bonding step and the second main bonding step may be performed first. In addition, before performing the first main bonding step and the second main bonding step, temporary bonding may be performed on at least one of the first abutting portion J1 and the third abutting portion J3 by friction stirring or welding. By performing the temporary bonding step, it is possible to prevent the opening of the first butted portion J1 and the third butted portion J3 in the first main bonding step or the second main bonding step.

First Modification
Next, a first modified example of the first embodiment will be described. As in the first modified example shown in FIG. 8, the plate thickness of the sealing body 3 may be set to be larger than the height dimension of the stepped side surface 12 b of the peripheral wall stepped portion 12. Since the first abutment portion J1 is formed to have a gap, there is a possibility that the bonding portion may run short of metal. However, the metal shortage can be compensated for as in the first modification.

Second Modification
Next, a second modified example of the first embodiment will be described. As in the second modification shown in FIG. 9, the outer peripheral side surface 3c of the sealing body 3 may be inclined to provide an inclined surface. The outer peripheral side surface 3c is inclined outward as going from the back surface 3b to the front surface 3a. The inclination angle γ of the outer peripheral side surface 3c is the same as the inclination angle β of the stepped side surface 12b. Thereby, in the mounting step, the stepped side surface 12 b and the outer peripheral side surface 3 c of the sealing body 3 are in surface contact with each other. According to the second modified example, no gap is generated in the first abutting portion J1, so that the metal shortage of the bonding portion can be compensated.

Second Embodiment
Next, a method of manufacturing a liquid cooling jacket according to a second embodiment of the present invention will be described. The manufacturing method of the liquid cooling jacket which concerns on 2nd embodiment performs a preparatory process, a mounting process, a 1st main joining process, and a 2nd main joining process. In the second embodiment, the preparation step, the mounting step, and the second main bonding step are the same as in the first embodiment, and thus the description thereof is omitted. In the second embodiment, parts different from the first embodiment will be mainly described.

  As shown in FIG. 10, the first main bonding step is a step of friction stir welding the first abutting portion J1 using a rotary tool F. In this bonding step, when the stirring pin F2 is relatively moved along the first abutment portion J1, the outer peripheral surface of the stirring pin F2 is slightly brought into contact with the stepped side surface 12b of the peripheral wall stepped portion 12 and the flat surface F3 is Friction stir welding is performed so as not to be in contact with the bottom surface 12 a of the step.

  Here, the contact margin of the outer peripheral surface of the stirring pin F2 with respect to the stepped side surface 12b is taken as an offset amount N. As in the present embodiment, when the outer peripheral surface of the stirring pin F2 is in contact with the stepped side surface 12b and the flat surface F3 of the stirring pin F2 is not in contact with the stepped bottom surface 12a, the offset amount N is 0 <N ≦ 0. It is set between 0.5 mm, preferably between 0 <N ≦ 0.25 mm.

  According to the method of manufacturing the conventional liquid-cooled jacket shown in FIG. 21, since the hardness differs between the jacket main body 101 and the sealing body 102, the stirring pin F2 is received by one side and the other side across the rotation center axis C. Material resistance also differs greatly. Therefore, the plastic fluid material is not stirred in a well-balanced manner, which is a factor that reduces the bonding strength. However, according to the present embodiment, since the contact margin between the outer peripheral surface of the stirring pin F2 and the jacket main body 2 is minimized, the material resistance that the stirring pin F2 receives from the jacket main body 2 can be minimized. Further, in the present embodiment, the inclination angle β of the step side surface 12b of the peripheral wall step portion 12 and the inclination angle α of the stirring pin F2 are the same (the step side surface 12b and the outer peripheral surface of the stirring pin F2 are parallel). The contact margin between the stirring pin F2 and the step side surface 12b can be made uniform over the height direction. Thereby, in the present embodiment, since the plastic fluid material is stirred in a well-balanced manner, it is possible to suppress a decrease in strength of the joint.

  In the second embodiment, as in the first and second modified examples of the first embodiment, the plate thickness of the sealing body 3 may be increased, or inclined surfaces may be provided on the side surfaces. In the second main bonding step, the fifth embodiment, the first modification of the fifth embodiment, or the sixth embodiment described later may be applied.

Third Embodiment
Next, a method of manufacturing a liquid cooling jacket according to a third embodiment of the present invention will be described. The manufacturing method of the liquid-cooling jacket which concerns on 3rd embodiment performs a preparatory process, a mounting process, a 1st main joining process, and a 2nd main joining process. In the third embodiment, the preparation step, the mounting step, and the second main bonding step are the same as those in the first embodiment, and thus the description thereof is omitted. In the third embodiment, parts different from the first embodiment will be mainly described.

  The first main bonding step is a step of friction stir welding the jacket main body 2 and the sealing body 3 by using a rotary tool F as shown in FIG. In this bonding step, when the stirring pin F2 is relatively moved along the first abutment portion J1, the outer peripheral surface of the stirring pin F2 is not in contact with the step side 12b, and the flat surface F3 is deeper than the step bottom 12a. Friction stir welding is performed in the inserted state.

  According to the method of manufacturing a liquid cooling jacket according to the present embodiment, the stirring pin F2 and the stepped side surface 12b of the peripheral wall stepped portion 12 are not in contact with each other, but the first butt is caused by the frictional heat of the sealing body 3 and the stirring pin F2. The second aluminum alloy mainly on the side of the sealing body 3 of the portion J1 is stirred and plasticized, and the stepped side surface 12b and the outer peripheral side surface 3c of the sealing body 3 can be joined at the first abutment portion J1. Further, in the first abutting portion J1, only the stirring pin F2 is brought into contact with only the sealing body 3 to perform friction stirring, and therefore, mixing of the first aluminum alloy from the jacket main body 2 to the sealing body 3 is hardly occurred. As a result, the second aluminum alloy on the side of the sealing body 3 is friction-stirred mainly in the first abutting portion J1, so that it is possible to suppress a decrease in bonding strength.

  Further, since the step side surface 12b of the jacket main body 2 is inclined outward, the contact between the stirring pin F2 and the step side surface 12b can be easily avoided. Further, in this embodiment, since the inclination angle β of the step side surface 12b and the inclination angle α of the stirring pin F2 are the same (the step side surface 12b and the outer peripheral surface of the stirring pin F2 are parallel to each other), The stirring pin F2 and the stepped side surface 12b can be made as close as possible while avoiding the contact of the stepped side surface 12b.

  Further, since the outer peripheral surface of the stirring pin F2 is separated from the stepped side surface 12b to perform the friction stir welding, the material resistance that the stirring pin F2 receives on one side and the other side with respect to the rotation center axis C of the stirring pin F2 is not The balance can be reduced. As a result, the plastic flow material is frictionally stirred in a well-balanced manner, so that it is possible to suppress a decrease in bonding strength. As in the present embodiment, when the outer peripheral surface of the stirring pin F2 is not in contact with the stepped side surface 12b and the flat surface F3 is inserted deeper than the stepped bottom surface 12a, the distance from the stepped side surface 12b to the outer peripheral surface of the stirring pin F2 For example, it is preferable to set the separation distance L to 0 ≦ L ≦ 0.5 mm, and preferably to set 0 ≦ L ≦ 0.3 mm.

  Further, by inserting the flat surface F3 of the stirring pin F2 into the stepped bottom surface 12a, the lower part of the joint portion can be frictionally stirred more reliably. As a result, it is possible to prevent the occurrence of a void defect or the like in the plasticized region W1, and to increase the bonding strength. Further, the entire flat surface F3 of the stirring pin F2 is located on the center side of the sealing body 3 with respect to the outer peripheral side surface 3c of the sealing body 3. As a result, the bonding area of the second abutting portion J2 can be enlarged, and thus the bonding strength can be increased.

  In the third embodiment, as in the first and second modified examples of the first embodiment, the plate thickness of the sealing body 3 may be increased, or an inclined surface may be provided on the side surface. In the second main bonding step, the fifth embodiment, the first modification of the fifth embodiment, or the sixth embodiment described later may be applied.

Fourth Embodiment
Next, a method of manufacturing a liquid cooling jacket according to a fourth embodiment of the present invention will be described. The manufacturing method of the liquid cooling jacket which concerns on 4th embodiment performs a preparatory process, a mounting process, a 1st main joining process, and a 2nd main joining process. In the fourth embodiment, the preparation step, the mounting step, and the second main bonding step are the same as those in the first embodiment, and thus the description thereof is omitted. In the fourth embodiment, parts different from the third embodiment will be mainly described.

  The first main joining step is a step of friction stir welding the first abutting portion J1 using a rotary tool F as shown in FIG. In this bonding step, when the stirring pin F2 is relatively moved along the first abutment portion J1, the outer peripheral surface of the stirring pin F2 is slightly brought into contact with the stepped side surface 12b of the peripheral wall stepped portion 12 and the flat surface F3 is The friction stir welding is performed by inserting it deeper than the bottom surface 12a of the step.

  Here, the contact margin of the outer peripheral surface of the stirring pin F2 with respect to the stepped side surface 12b is taken as an offset amount N. As in the present embodiment, when the flat surface F3 of the stirring pin F2 is inserted deeper than the stepped bottom surface 12a of the peripheral wall stepped portion 12 and the outer peripheral surface of the stirring pin F2 is in contact with the stepped side surface 12b, the offset amount N Is set between 0 <N ≦ 1.0 mm, preferably between 0 <N ≦ 0.85 mm, more preferably between 0 <N ≦ 0.65 mm.

  According to the method of manufacturing the conventional liquid-cooled jacket shown in FIG. 21, since the hardness differs between the jacket main body 101 and the sealing body 102, the stirring pin F2 is received by one side and the other side across the rotation center axis C. Material resistance also differs greatly. Therefore, the plastic fluid material is not stirred in a well-balanced manner, which is a factor that reduces the bonding strength. However, according to the present embodiment, since the contact margin between the outer peripheral surface of the stirring pin F2 and the jacket main body 2 is minimized, the material resistance that the stirring pin F2 receives from the jacket main body 2 can be reduced. Further, in this embodiment, since the inclination angle β of the step side surface 12b and the inclination angle α of the stirring pin F2 are the same (the step side surface 12b and the outer peripheral surface of the stirring pin F2 are parallel to each other), The contact margin with the stepped side surface 12b can be made uniform over the height direction. Thereby, in the present embodiment, since the plastic fluid material is stirred in a well-balanced manner, it is possible to suppress a decrease in strength of the joint.

  Further, by inserting the flat surface F3 of the stirring pin F2 into the stepped bottom surface 12a, the lower part of the joint portion can be frictionally stirred more reliably. As a result, it is possible to prevent the occurrence of a void defect or the like in the plasticized region W1, and to increase the bonding strength. That is, both the first butting portion J1 and the second butting portion J2 can be firmly joined.

  In the fourth embodiment, as in the first and second modified examples of the first embodiment, the plate thickness of the sealing body 3 may be increased, or sloped surfaces may be provided on the side surfaces. In the second main bonding step, the fifth embodiment, the first modification of the fifth embodiment, or the sixth embodiment described later may be applied.

First Modification of Fourth Embodiment
Next, a first modified example of the fourth embodiment will be described. As shown in FIG. 13, the first modification is different from the fourth embodiment in that a rotation tool FA is used. In the modified example, parts different from the fourth embodiment will be mainly described.

  The rotary tool FA used in the main bonding step includes a connecting portion F1 and a stirring pin F2. The stirring pin F2 is configured to include a flat surface F3 and a protrusion F4. The protrusion F4 is a portion that protrudes downward from the flat surface F3. The shape of the protrusion F4 is not particularly limited, but in the present embodiment, it is cylindrical. A stepped portion is formed by the side surface of the protrusion F4 and the flat surface F3.

  In the main bonding step of the first modified example, the tip of the rotary tool FA is inserted deeper than the stepped bottom surface 12a. As a result, the plastic fluid material that is friction-stirred along the protrusion F4 and wound up to the protrusion F4 is pressed by the flat surface F3. As a result, it is possible to frictionally agitate the periphery of the protrusion F4 more reliably and, at the same time, the oxide film of the second abutting portion J2 is reliably divided. Thus, the bonding strength of the second abutment portion J2 can be increased. Further, as in the modification, by setting only the protrusion F4 to be inserted deeper than the second abutment portion J2, plasticity is obtained as compared to the case where the flat surface F3 is inserted deeper than the second abutment portion J2. The width of the conversion area W1 can be reduced. Thus, the plastic fluid material can be prevented from flowing out to the recess 13, and the width of the step bottom surface 12a can be set small.

  In the first modification of the fourth embodiment shown in FIG. 13, the projection F4 (the tip of the stirring pin F2) is set to be inserted deeper than the second abutment J2, but the flat surface F3 is You may set so that it may insert more deeply than the 2nd butting part J2.

Fifth Embodiment
Next, a method of manufacturing a liquid cooling jacket according to the fifth embodiment will be described. In the method of manufacturing a liquid-cooled jacket according to the fifth embodiment, a preparation step, a placement step, a first main bonding step, and a second main bonding step are performed. In the fifth embodiment, the preparation step, the mounting step, and the first main bonding step are the same as those in the first embodiment, and thus the description thereof is omitted. In the fifth embodiment, parts different from the first embodiment will be mainly described.

  In the second main joining step, as shown in FIG. 14, the friction stir welding is performed by making the circumference of the third abutment portion J3 go around without bringing the rotary tool F into contact with the support column 15 and the projecting part 16. In the second main joining step, the friction stir welding is performed without the stirring pin F2 coming into contact with either the step side 17b or the step bottom 17a of the column step 17, but the insertion depth of the stirring pin F2 is the plasticization region W2 Are set to reach the fourth abutment portion J4. That is, the fourth abutment portion J4 is plasticized and joined by the frictional heat of the stirring pin F2 and the sealing body 3. The insertion depth may be set such that the stirring pin F2 contacts the stepped bottom surface 17a of the column support 17.

First Modification of Fifth Embodiment
Next, a method of manufacturing a liquid cooling jacket according to a first modification of the fifth embodiment will be described. In the manufacturing method of the liquid cooling jacket which concerns on the 1st modification of 5th embodiment, a preparatory process, a mounting process, a 1st main joining process, and a 2nd main joining process are performed. The modification is different from the fifth embodiment in that the rotary tool FA is used in the second main bonding step.

  In the second main joining step, as shown in FIG. 15, the friction stir welding is performed by making the circumference of the third abutting portion J3 go around without bringing the rotary tool FA into contact with the step side surface 17b (projecting portion 16). In the second main joining step, the tip of the rotary tool FA is inserted deeper than the stepped bottom surface 17 a of the column stepped portion 17. As a result, the plastic fluid material that is friction-stirred along the protrusion F4 and wound up to the protrusion F4 is pressed by the flat surface F3. As a result, it is possible to frictionally stir around the protrusion F4 more reliably, and the oxide film of the fourth butt portion J4 is reliably divided. Thereby, the joint strength of the fourth butt portion J4 can be increased. Further, as in the modification, by setting only the protrusion F4 to be inserted deeper than the fourth butting portion J4, plasticity is obtained as compared to the case where the flat surface F3 is inserted deeper than the fourth butted portion J4. The width of the conversion area W2 can be reduced. Thus, the plastic flow material can be prevented from flowing out to the recess 13 and the width of the step bottom surface 17 a of the column step portion 17 can be set small.

  In the first modified example of the fifth embodiment shown in FIG. 15, the protrusion F4 (the tip of the stirring pin F2) is set to be inserted deeper than the fourth butting portion J4, but the flat surface F3 is You may set so that it may insert more deeply than the 4th butt part J4.

Sixth Embodiment
Next, a method of manufacturing a liquid cooling jacket according to the sixth embodiment will be described. In the method of manufacturing a liquid-cooled jacket according to the sixth embodiment, a preparation step, a placement step, a first main bonding step, and a second main bonding step are performed. In the sixth embodiment, the preparation step, the mounting step, and the first main bonding step are the same as in the first embodiment, and thus the description thereof is omitted.

  In the second main joining step, the friction stir welding is performed on the third abutting portion J3 in a state in which the rotary tool F is inclined outward with respect to the protrusion 16. In the second main bonding step, the friction stir welding is performed in a state in which the rotation center axis C of the rotary tool F is inclined outward by an angle α with respect to the protrusion 16. As a result, the outer peripheral surface of the stirring pin F2 and the stepped side surface 17b of the column stepped portion 17 become parallel. The stepped side surface 17b and the stirring pin F2 may be separated or may be slightly in contact with each other.

  In the method of manufacturing a liquid-cooled jacket according to the sixth embodiment, friction stirring can be performed in a state where the outer peripheral surface of the stirring pin F2 and the stepped side surface 17b are parallel to each other, so the stepped side surface 17b and the outer peripheral surface of the stirring pin F2 are separated In this case, the rotary tool F can be brought close to the projection 16 as much as possible. Thereby, the first aluminum alloy can be prevented from being mixed from the jacket main body 2 side to the sealing body 3 side, and the bonding strength can be enhanced. On the other hand, when the step side 17b and the stirring pin F2 are slightly brought into contact with each other, it is possible to prevent the first aluminum alloy from being mixed from the jacket body 2 side to the sealing body 3 as much as possible. It can be uniformly contacted. The stirring pin F2 may be in contact with the stepped bottom surface 17a.

Third Modification of First Embodiment
Next, the manufacturing method of the liquid cooling jacket which concerns on the 3rd modification of 1st embodiment is demonstrated. As shown in FIG. 17, the third modification is different from the first embodiment in that the temporary bonding step, the first main bonding step, and the second main bonding step are performed using a cooling plate. In the third modified example of the first embodiment, parts different from the first embodiment will be mainly described.

  As shown in FIG. 17, in the third modified example of the first embodiment, the jacket main body 2 is fixed to the table K when performing the fixing step. The table K is composed of a substrate K1 having a rectangular parallelepiped shape, clamps K3 formed at four corners of the substrate K1, and a cooling pipe WP disposed inside the substrate K1. The table K is a member which restrains the jacket body 2 so as not to move and functions as a "cooling plate" in the claims.

  The cooling pipe WP is a tubular member embedded inside the substrate K1. Inside the cooling pipe WP, a cooling medium for cooling the substrate K1 flows. The arrangement position of the cooling pipe WP, that is, the shape of the cooling flow path through which the cooling medium flows is not particularly limited, but in the third modification, it has a planar shape along the movement trajectory of the rotary tool F in the first main joining step. There is. That is, when viewed in plan, the cooling pipe WP is disposed such that the cooling pipe WP and the first abutment portion J1 substantially overlap.

  In the temporary joining step, the first main joining step, and the second main joining step of the third modification, after the jacket body 2 is fixed to the table K, friction stir welding is performed while flowing the cooling medium through the cooling pipe WP. Thereby, since the frictional heat at the time of frictional stirring can be restrained low, the deformation of liquid cooling jacket 1 resulting from heat contraction can be made small. Moreover, in the said 3rd modification, when it planarly views, since a cooling flow path and the 1st butting part J1 (moving track of the rotating tool for temporary joining and the rotating tool F) overlap, it is a frictional heat. It is possible to intensively cool the part where the Thereby, the cooling efficiency can be enhanced. Further, since the cooling pipe WP is disposed to circulate the cooling medium, the management of the cooling medium becomes easy. Moreover, since the table K (cooling plate) and the jacket main body 2 are in surface contact, the cooling efficiency can be enhanced.

  In addition, while cooling the jacket main body 2 and the sealing body 3 using a table K (cooling plate), friction stir welding may be performed while flowing a cooling medium also to the inside of the jacket main body 2.

Fourth Modified Example of First Embodiment
Next, the manufacturing method of the liquid cooling jacket concerning the 4th modification of a first embodiment is explained. As shown in (a) and (b) of FIG. 18, in the fourth modification of the first embodiment, the surface side of the jacket main body 2 and the surface 3 a of the sealing body 3 are curved to be convex. It is different from the first embodiment in that the first main bonding step and the second main bonding step are performed in the state. In the fourth modification, the differences from the first embodiment will be mainly described.

  As shown in FIGS. 18A and 18B, the fourth modification uses the table KA. The table KA is composed of a substrate KA1 in the form of a rectangular parallelepiped, a spacer KA2 formed at the center of the substrate KA1, and clamps KA3 formed at the four corners of the substrate KA1. The spacer KA2 may be integral with or separate from the substrate KA1.

  In the fixing step of the fourth modified example, the jacket body 2 and the sealing body 3 integrated by performing the temporary bonding step are fixed to the table KA by the clamp KA3. The plasticizing region W is formed by the temporary joining process. As shown in FIG. 18A, when the jacket body 2 and the sealing body 3 are fixed to the table KA, the bottom 10, the end face 11a and the surface 3a of the sealing body 3 of the jacket body 2 are upwardly convex. As curved. More specifically, the first side 21 of the wall 11A of the jacket body 2, the second side 22 of the wall 11B, the third side 23 of the wall 11C, and the fourth side 24 of the wall 11D are curved. Curve to become.

  In the first main bonding step and the second main bonding step of the fourth modification example, friction stir welding is performed using a rotary tool F. In the first main bonding step and the second main bonding step, the deformation amount of at least one of the jacket main body 2 and the sealing body 3 is measured, and the insertion depth of the stirring pin F2 is adjusted according to the deformation amount. While performing friction stir welding. That is, along the curved surface of the end face 11 a of the jacket main body 2 and the surface 3 a of the sealing body 3, the movement trajectory of the rotary tool F is moved so as to be a curved line. By doing so, the depths and widths of the plasticized regions W1 and W2 can be made constant.

  Heat shrinkage may occur in the plasticized areas W1 and W2 due to the heat input of friction stir welding, and the sealing body 3 side of the liquid-cooled jacket 1 may be deformed in a concave shape, but the first main bonding step of the fourth modification According to the second main bonding step, the jacket main body 2 and the sealing body 3 are fixed in advance so that tensile stress acts on the end face 11a and the surface 3a, so thermal contraction after friction stir welding is achieved. By using it, the liquid cooling jacket 1 can be made flat. When the main joining step is performed with the conventional rotary tool, if the jacket main body 2 and the sealing body 3 are bent in a convex shape, the shoulder portion of the rotary tool contacts the jacket main body 2 and the sealing body 3 to operate There is a problem that sex is bad. However, according to the fourth modification, since there is no shoulder portion in the rotating tool F, the operability of the rotating tool F is good even when the jacket main body 2 and the sealing body 3 are warped in a convex shape. It becomes.

  In addition, about measurement of the deformation amount of the jacket main body 2 and the sealing body 3, what is necessary is just to use a well-known height detection apparatus. Also, for example, using a friction stir device equipped with a detection device for detecting the height from table KA to at least one of jacket main body 2 and sealing body 3, deformation of jacket main body 2 or sealing body 3 The first main bonding step and the second main bonding step may be performed while detecting the amount.

  Moreover, in the said 4th modification, although the jacket main body 2 and the sealing body 3 were curved so that all of the 1st side part 21-4th side part 24 might become a curve, it is not limited to this. For example, the first side 21 and the second side 22 may be straight, and the third side 23 and the fourth side 24 may be curved. Also, for example, the first side portion 21 and the second side portion 22 may be curved, and the third side portion 23 and the fourth side portion 24 may be curved so as to be straight.

  Moreover, in the said 4th modification, although the height position of the stirring pin F2 was changed according to the deformation of the jacket main body 2 or the sealing body 3, the height of the stirring pin F2 with respect to the table KA is made constant, and this joining process You may

  Further, the spacer KA2 may have any shape as long as it can be fixed so that the surface sides of the jacket main body 2 and the sealing body 3 are convex. Further, the spacer KA2 may be omitted as long as the surface side of the jacket main body 2 and the sealing body 3 can be fixed so as to be convex. In addition, the rotary tool F may be attached to, for example, a robot arm provided with rotary drive means such as a spindle unit at its tip. According to this configuration, the rotation center axis of the rotation tool F can be easily changed to various angles.

Fifth Modification of First Embodiment
Next, a method of manufacturing a liquid cooling jacket according to a fifth modification of the first embodiment will be described. As shown in FIG. 19, in the fifth modification of the first embodiment, in the preparing step, the jacket main body 2 and the sealing body 3 are formed in advance so as to be convexly curved toward the surface side. It is different from. In the fifth modification of the first embodiment, parts different from the first embodiment will be mainly described.

  At the preparation process which concerns on the 5th modification of 1st embodiment, it forms by die casting so that the surface side of the jacket main body 2 and the sealing body 3 may curve in convex shape. Thereby, the jacket main body 2 is formed so that the bottom part 10 and the surrounding wall part 11 may become convex on the surface side, respectively. Moreover, it forms so that the surface 3a of the sealing body 3 may become convex.

  As shown in FIG. 20, in the fifth modification, the jacket body 2 and the sealing body 3 temporarily joined are fixed to the table KB when performing the fixing step. The table KB includes a substrate KB1 having a rectangular parallelepiped shape, a spacer KB2 disposed at the center of the substrate KB1, clamps KB3 formed at four corners of the substrate KB1, and a cooling pipe WP embedded in the substrate KB1. It is done. The table KB is a member that restrains the jacket body 2 so as not to move and functions as a "cooling plate" in the claims.

  The spacer KB2 is composed of a curved surface KB2a which is curved to be convex upward, and elevations KB2b and KB2b which are formed at both ends of the curved surface KB2a and rise from the substrate KB1. The first side portion Ka and the second side portion Kb of the spacer KB2 are curved, and the third side portion Kc and the fourth side portion Kd are straight.

  The cooling pipe WP is a tubular member embedded inside the substrate KB1. A cooling medium for cooling the substrate KB1 flows in the cooling pipe WP. The arrangement position of the cooling pipe WP, that is, the shape of the cooling flow passage through which the cooling medium flows is not particularly limited, but in the fifth modification, it has a planar shape along the movement trajectory of the rotary tool F in the first main joining step. There is. That is, when viewed in plan, the cooling pipe WP is disposed such that the cooling pipe WP and the first abutment portion J1 substantially overlap.

  In the fixing step of the fifth modified example, the jacket main body 2 and the sealing body 3 which are temporarily joined and integrated are fixed to the table KB by the clamp KB3. More specifically, it is fixed to the table KB so that the back surface of the bottom portion 10 of the jacket body 2 is in surface contact with the curved surface KB 2 a. When the jacket main body 2 is fixed to the table KB, the first side 21 of the wall 11A of the jacket main body 2 and the second side 22 of the wall 11B become curved, and the third side 23 of the wall 11C and the wall 11D Curved so that the fourth side 24 of the

  In the first main bonding step and the second main bonding step of the fifth modification, friction stir welding is performed on the first butting portion J1 and the second butting portion J2 using the rotary tool F. In the first main bonding step and the second main bonding step, the deformation amount of at least one of the jacket main body 2 and the sealing body 3 is measured, and the insertion depth of the stirring pin F2 is adjusted according to the deformation amount. While performing friction stir welding. That is, the movement trajectory of the rotary tool F is moved along the end surface 11 a of the jacket main body 2 and the surface 3 a of the sealing body 3 so as to form a curve or a straight line. By doing this, the depth and width of the plasticized region W1 can be made constant.

  There is a possibility that thermal contraction occurs in the plasticized areas W1 and W2 due to the heat input of the friction stir welding, and the sealing body 3 side of the liquid cooling jacket 1 may be deformed in a concave shape, but the first main joining process of the fifth modification And, according to the second main bonding step, since the jacket main body 2 and the sealing body 3 are formed in a convex shape in advance, the liquid cooling jacket 1 is flattened by utilizing the thermal contraction after the friction stir welding. Can.

  In the fifth modification, the curved surface KB2a of the spacer KB2 is in surface contact with the concave back surface of the bottom portion 10 of the jacket main body 2. Thereby, friction stir welding can be performed, cooling the jacket main body 2 and the sealing body 3 more effectively. Since the frictional heat in the friction stir welding can be suppressed low, the deformation of the liquid cooling jacket due to the thermal contraction can be reduced. Thereby, when forming the jacket main body 2 and the sealing body 3 in a convex shape in the preparation process, the curvature of the jacket main body 2 and the sealing body 3 can be reduced.

  In addition, about measurement of the deformation amount of the jacket main body 2 and the sealing body 3, what is necessary is just to use a well-known height detection apparatus. Also, for example, using a friction stir device equipped with a detection device that detects the height from table KB to at least one of jacket main body 2 and sealing body 3, deformation of jacket main body 2 or sealing body 3 The main bonding step may be performed while detecting the amount.

  Moreover, in the said 5th modification, although the jacket main body 2 and the sealing body 3 were curved so that the 1st side part 21 and the 2nd side part 22 might become a curve, it is not limited to this. For example, a spacer KB2 having a spherical surface may be formed, and the rear surface of the bottom portion 10 of the jacket body 2 may be in surface contact with the spherical surface. In this case, when the jacket main body 2 is fixed to the table KB, all of the first side portion 21 to the fourth side portion 24 are curved.

  Moreover, in the said 5th modification, although the height position of the stirring pin F2 was changed according to the deformation of the jacket main body 2 or the sealing body 3, the height of the stirring pin F2 with respect to the table KB is made constant, and this joining process You may

DESCRIPTION OF SYMBOLS 1 Liquid cooling jacket 2 Jacket main body 3 Sealing body 3a Surface 3b Back surface 3c Outer peripheral side 10 Bottom part 11 Peripheral wall part 11a Peripheral wall end surface 12 Peripheral wall level difference part 12a Level difference bottom surface 12b Level difference side 13 Recess 17 Strut level difference part 17a Level difference bottom surface 17b Level difference side F rotation Tool F2 Stirring pin J1 First abutment part J2 Second abutment part J3 Third abutment part J4 Fourth abutment part K Table (cooling plate)
W1 plasticization area W2 plasticization area WP cooling pipe

Claims (13)

A bottom portion, a jacket body having a peripheral wall portion rising from the periphery of the bottom portion, and a column body having a column rising from the bottom portion, and a sealing body including a hole into which the tip of the column is inserted and sealing the opening of the jacket body It is a manufacturing method of the liquid cooling jacket which comprises the said jacket main body and the said sealing body by friction stirring,
The jacket body is formed of a first aluminum alloy, the sealing body is formed of a second aluminum alloy, and the first aluminum alloy is a grade whose hardness is higher than that of the second aluminum alloy.
The outer peripheral surface of the stirring pin of the rotating tool is inclined to be tapered,
At the inner peripheral edge of the peripheral wall portion, there is formed a peripheral wall stepped portion having a stepped bottom surface and a stepped side surface that obliquely rises so as to extend outward from the stepped bottom surface toward the opening, and at the tip of the support A preparatory step of forming a support stepped portion having a stepped bottom surface and a stepped side surface rising from the stepped bottom surface;
By mounting the sealing body on the jacket main body, the step side surface of the peripheral wall step portion and the outer peripheral side surface of the sealing body are butted to form a first abutment portion, and the step bottom surface of the peripheral wall step portion And the back surface of the sealing body are overlapped to form a second butting portion, and the side surface of the stepped portion of the support and the hole wall of the hole of the sealing body are butted to form a third abutting portion. Mounting step of forming a fourth butt portion by superposing the step bottom surface of the pillar step portion and the back surface of the sealing body while forming the fourth butt portion;
In a state in which only the rotating stirring pin is inserted into the sealing body and only the stirring pin is in contact with only the sealing body, the rotary tool is made to go around along the first abutment portion to perform friction stirring. The first primary bonding process to be performed,
Only the rotating stirring pin is inserted into the sealing body, and while the stirring pin is slightly in contact with the step side surface of the column step portion, the rotary tool is made to go around along the third abutment portion. And b) a second main joining step of frictionally stirring.   In the second main joining step, friction stirring is performed by causing the rotary tool to go around along the third butting portion in a state where the stirring pin is slightly in contact with the step bottom of the column step portion. The manufacturing method of the liquid cooling jacket according to claim 1 characterized by the above-mentioned. A bottom portion, a jacket body having a peripheral wall portion rising from the periphery of the bottom portion, and a column body having a column rising from the bottom portion, and a sealing body including a hole into which the tip of the column is inserted and sealing the opening of the jacket body It is a manufacturing method of the liquid cooling jacket which comprises the said jacket main body and the said sealing body by friction stirring,
The jacket body is formed of a first aluminum alloy, the sealing body is formed of a second aluminum alloy, and the first aluminum alloy is a grade whose hardness is higher than that of the second aluminum alloy.
The outer peripheral surface of the stirring pin of the rotating tool is inclined to be tapered,
At the inner peripheral edge of the peripheral wall portion, there is formed a peripheral wall stepped portion having a stepped bottom surface and a stepped side surface that obliquely rises so as to extend outward from the stepped bottom surface toward the opening, and at the tip of the support A preparatory step of forming a support stepped portion having a stepped bottom surface and a stepped side surface rising from the stepped bottom surface;
By mounting the sealing body on the jacket main body, the step side surface of the peripheral wall step portion and the outer peripheral side surface of the sealing body are butted to form a first abutment portion, and the step bottom surface of the peripheral wall step portion And the back surface of the sealing body are overlapped to form a second butting portion, and the side surface of the stepped portion of the support and the hole wall of the hole of the sealing body are butted to form a third abutting portion. Mounting step of forming a fourth butt portion by superposing the step bottom surface of the pillar step portion and the back surface of the sealing body while forming the fourth butt portion;
In a state where only the rotating stirring pin is inserted into the sealing body and the stirring pin is slightly in contact with the stepped side surface of the peripheral wall portion, the rotation tool is made to go around along the first abutment portion to perform friction. A first primary joining step of stirring;
Only the rotating stirring pin is inserted into the sealing body, and while the stirring pin is slightly in contact with the step side surface of the column step portion, the rotary tool is made to go around along the third abutment portion. And b) a second main joining step of frictionally stirring.   In the first main joining step, in a state where the agitating pin is slightly brought into contact with the step bottom of the peripheral wall step portion, the rotational stirring is performed around the first abutment portion to perform friction stirring. The manufacturing method of the liquid cooling jacket of Claim 3 characterized by the above-mentioned.   In the second main joining step, friction stirring is performed by causing the rotary tool to go around along the third butting portion in a state where the stirring pin is slightly in contact with the step bottom of the column step portion. The manufacturing method of the liquid cooling jacket of Claim 3 or 4 characterized by the above-mentioned.   In the preparing step, the jacket main body is formed by die-casting, the bottom is formed to be convex on the surface side, and the sealing body is formed to be convex on the surface side. The manufacturing method of the liquid cooling jacket as described in any one of Claim 1 thru | or 5.   The amount of deformation of the jacket body is measured in advance, and in the first main bonding step and the second main bonding step, the friction stirring is performed while adjusting the insertion depth of the stirring pin of the rotary tool according to the amount of deformation. The method for producing a liquid cooling jacket according to claim 6, characterized in that:   The temporary joining step of temporarily joining at least one of the first butting portion and the third butting portion prior to the first main joining step and the second main joining step is included. The manufacturing method of the liquid cooling jacket as described in any one of claim | item 7.   In the first main bonding step and the second main bonding step, a cooling plate in which a cooling medium flows is disposed on the back surface side of the bottom, and friction stirring is performed while cooling the jacket main body and the sealing body The manufacturing method of the liquid cooling jacket as described in any one of the Claims 1 thru | or 8 characterized by doing.   The method for manufacturing a liquid cooling jacket according to claim 9, wherein the surface of the cooling plate and the back surface of the bottom portion are brought into surface contact. The cooling plate has a cooling channel through which the cooling medium flows,
The method for manufacturing a liquid cooling jacket according to claim 9 or 10, wherein the cooling channel has a planar shape along a movement trajectory of the rotating tool in the first main joining step.   The method of manufacturing a liquid cooling jacket according to any one of claims 9 to 11, wherein the cooling flow path through which the cooling medium flows is constituted by a cooling pipe embedded in the cooling plate. .   In the first main bonding step and the second main bonding step, a cooling medium is caused to flow through the hollow portion formed by the jacket main body and the sealing body, and the stirring is performed while cooling the jacket main body and the sealing body The method for producing a liquid cooling jacket according to any one of claims 1 to 12, characterized in that:

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