WO2019202754A1 - 液冷ジャケットの製造方法 - Google Patents

液冷ジャケットの製造方法 Download PDF

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Publication number
WO2019202754A1
WO2019202754A1 PCT/JP2018/034605 JP2018034605W WO2019202754A1 WO 2019202754 A1 WO2019202754 A1 WO 2019202754A1 JP 2018034605 W JP2018034605 W JP 2018034605W WO 2019202754 A1 WO2019202754 A1 WO 2019202754A1
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WO
WIPO (PCT)
Prior art keywords
sealing body
stirring pin
jacket
peripheral wall
stirring
Prior art date
Application number
PCT/JP2018/034605
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English (en)
French (fr)
Japanese (ja)
Inventor
堀　久司
伸城 瀬尾
Original Assignee
日本軽金属株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2018081331A external-priority patent/JP2019188413A/ja
Priority claimed from JP2018081343A external-priority patent/JP6927134B2/ja
Application filed by 日本軽金属株式会社 filed Critical 日本軽金属株式会社
Priority to CN201880054879.4A priority Critical patent/CN111163895A/zh
Publication of WO2019202754A1 publication Critical patent/WO2019202754A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding

Definitions

  • the present invention relates to a method for manufacturing a liquid cooling jacket.
  • Patent Document 1 discloses a method for manufacturing a liquid cooling jacket.
  • FIG. 30 is a cross-sectional view showing a conventional method for manufacturing a liquid cooling jacket.
  • a butt J10 formed by abutting a step side surface 101c provided on a step portion of an aluminum alloy jacket body 101 and a side surface 102c of an aluminum alloy sealing body 102. Friction stir welding is performed. 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 abutting portion J10. Further, in the conventional method for manufacturing a liquid cooling jacket, the rotation center axis C of the rotary tool F is overlapped with the abutting portion J10 and relatively moved.
  • the jacket body 101 is likely to have a complicated shape.
  • the jacket body 101 is formed of a cast material of 4000 series aluminum alloy, and a relatively simple shape such as the sealing body 102 is a stretched material of 1000 series aluminum alloy.
  • members having different aluminum alloy grades may be joined together to produce a liquid cooling jacket.
  • the jacket body 101 is generally harder than the sealing body 102, when the 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. For this reason, it is difficult to stir different materials in a balanced manner by the stirring pin of the rotary tool F, and there is a problem that a cavity defect occurs in the plasticized region after joining and the joining strength is lowered.
  • an object of the present invention is to provide a manufacturing method of a liquid cooling jacket capable of suitably joining aluminum alloys of different grades.
  • the present invention includes a jacket body having a bottom portion, a peripheral wall portion rising from a peripheral edge of the bottom portion, and a support column rising from the bottom portion, and a recess into which a tip end of the support column is inserted.
  • a liquid cooling jacket manufacturing method comprising: a sealing body that seals an opening; and joining the jacket body and the sealing body by friction stir, wherein the jacket body is formed of a first aluminum alloy.
  • the sealing body is made of a second aluminum alloy, the first aluminum alloy is a material having a higher hardness than the second aluminum alloy, and the outer peripheral surface of the stirring pin of the rotary tool is tapered.
  • a flat surface perpendicular to the rotation center axis of the rotary tool is formed on the tip side of the stirring pin, and the flat surface protrudes.
  • a third abutting portion is formed by abutting the step side surface of the column stepped portion with the inner wall of the recess of the sealing body, and a fourth abutting is performed by overlapping the end surface of the column and the bottom surface of the recess.
  • the flat surface of the stirring pin is brought into contact with only the sealing body, and friction stirring is performed on the fourth butting portion in a state where the protruding portion of the stirring pin is in contact with the end surface of the support column. And a two-joining step.
  • the second aluminum alloy on the sealing body side is mainly stirred and plastically fluidized by frictional heat between the sealing body and the stirring pin, and the step side surface and the outer peripheral side surface of the sealing body can be joined. it can.
  • the first butting portion since the friction stir is performed without bringing the stirring pin into contact with the stepped side surface of the peripheral wall portion, the first aluminum alloy is hardly mixed into the sealing body from the jacket body.
  • the periphery of the protruding portion can be frictionally stirred more reliably, and the oxide film on the second butting portion can be reliably divided. Thereby, the joining strength of a 2nd butt
  • the step side surface of the jacket body is inclined outward, contact between the stirring pin and the jacket body can be easily avoided without causing a decrease in bonding strength.
  • the flat surface of the stirring pin is brought into contact with only the sealing body, and the friction stirring is performed in a state where the protruding portion of the stirring pin is in contact with the end surface of the support column.
  • the rotating tool is caused to make a round along the first butting portion in a state where the flat surface of the stirring pin is slightly in contact with the step bottom surface of the peripheral wall step portion. It is preferable to perform stirring.
  • the flat surface of the stirring pin is slightly brought into contact with the bottom surface of the step at the second butting portion, and the protruding portion is only inserted into the jacket body.
  • the present invention includes a jacket body having a bottom portion, a peripheral wall portion rising from a peripheral edge of the bottom portion, and a support column rising from the bottom portion, a recess into which a tip of the support column is inserted, and sealing an opening portion of the jacket body.
  • a liquid cooling jacket manufacturing method comprising: a sealing body, wherein the jacket body and the sealing body are joined by friction stir, wherein the jacket body is formed of a first aluminum alloy, The body is formed of a second aluminum alloy, and the first aluminum alloy is a material having a higher hardness than the second aluminum alloy, and the outer peripheral surface of the stirring pin of the rotary tool is inclined so as to be tapered.
  • a flat surface perpendicular to the rotation center axis of the rotary tool is formed on the tip side of the stirring pin, and the flat surface includes a protruding protrusion.
  • a peripheral wall step portion having a step bottom surface and a step side surface rising obliquely so as to spread outward from the step bottom surface toward the opening is formed on the inner peripheral edge of the recording wall portion, and at the tip of the column
  • a first abutting portion is formed by abutting the outer peripheral side surface of the stationary body, and a second abutting portion is formed by overlapping a step bottom surface of the peripheral wall step portion and a back surface of the sealing body.
  • a third abutting portion is formed by abutting the step side surface of the portion and the inner wall of the concave portion of the sealing body, and a fourth abutting portion is formed by overlapping the end surface of the column and the bottom surface of the concave portion Process Then, only the rotating stirring pin is inserted into the sealing body, the stirring pin is slightly in contact with the step side surface of the peripheral wall step portion, and the protruding portion of the stirring pin is further on the step bottom surface of the peripheral wall step portion.
  • a first main joining step in which the rotating tool is rotated around the first abutting portion to perform frictional stirring, and only the rotating stirring pin is inserted into the sealing body.
  • a second main joining step in which frictional stirring is performed on the fourth abutting portion in a state where the flat surface of the contact is brought into contact with the sealing body, and the protruding portion of the stirring pin is in contact with the end surface of the support column, It is characterized by including.
  • the second aluminum alloy on the sealing body side is mainly stirred and plastically fluidized by frictional heat between the sealing body and the stirring pin, and the step side surface and the outer peripheral side surface of the sealing body can be joined. it can.
  • the outer peripheral surface of the stirring pin is kept in slight contact with the step side surface of the jacket body, so that the mixing of the first aluminum alloy from the jacket body to the sealing body can be minimized.
  • the periphery of the protruding portion can be frictionally stirred more reliably, and the oxide film on the second butting portion can be reliably divided. Thereby, the joining strength of a 2nd butt
  • the step side surface of the jacket body is inclined outward, contact between the stirring pin and the jacket body can be easily avoided without causing a decrease in bonding strength.
  • the flat surface of the stirring pin is brought into contact with only the sealing body, and the friction stirring is performed in a state where the protruding portion of the stirring pin is in contact with the end surface of the support column.
  • the rotating tool is caused to make a round along the first butting portion in a state where the flat surface of the stirring pin is slightly in contact with the step bottom surface of the peripheral wall step portion. It is preferable to perform stirring.
  • the flat surface of the stirring pin is slightly brought into contact with the bottom surface of the step at the second butting portion, and the protruding portion is only inserted into the jacket body.
  • the jacket body may be formed by die casting, 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.
  • the jacket body and the sealing body can be made flat and the liquid cooling jacket can be flattened by utilizing heat shrinkage.
  • the deformation amount of the jacket body is measured in advance, and the insertion depth of the stirring pin of the rotary tool is adjusted in accordance with the deformation amount in the first main joining step and the second main joining step. It is preferable to perform friction stirring.
  • the length and width of the plasticized region formed in the liquid cooling jacket can be made constant. it can.
  • a temporary joining step of temporarily joining the first butted portion is included prior to the first main joining step.
  • a cooling plate through which a cooling medium flows is installed on the back side of the bottom portion, and the jacket main body and the sealing body are cooled by the cooling plate while friction is performed. It is preferable to perform stirring.
  • the surface of the cooling plate and the back surface of the bottom portion are in surface contact. According to this manufacturing method, the cooling efficiency can be increased.
  • the cooling plate has a cooling flow path through which the cooling medium flows, and the cooling flow path has a planar shape along a movement locus of the rotary tool in the first main joining step.
  • the friction stir part can be intensively cooled, so that the cooling efficiency can be further increased.
  • the cooling flow path through which the cooling medium flows is constituted by a cooling pipe embedded in the cooling plate. According to this manufacturing method, the cooling medium can be easily managed.
  • a cooling medium is allowed to flow through a hollow portion constituted by the jacket main body and the sealing body, and the jacket main body and the sealing body are cooled. It is preferable to perform friction stirring.
  • the frictional heat can be kept low, the deformation of the liquid cooling jacket due to thermal contraction can be reduced. Further, the jacket body itself can be used for cooling without using a cooling plate or the like.
  • the present invention includes a jacket body having a bottom portion, a peripheral wall portion rising from a peripheral edge of the bottom portion, and a support column rising from the bottom portion, a recess into which a tip of the support column is inserted, and sealing an opening portion of the jacket body.
  • a liquid cooling jacket manufacturing method comprising: a sealing body, wherein the jacket body and the sealing body are joined by friction stir, wherein the jacket body is formed of a first aluminum alloy, The body is made of a second aluminum alloy, the first aluminum alloy is a material having a hardness higher than that of the second aluminum alloy, and the outer peripheral surface of the stirring pin of the rotary tool used for friction stirring is tapered.
  • a stepped portion having a stepped bottom surface and a stepped side surface rising from the stepped bottom surface, and a plate of the sealing body.
  • Friction stirring is performed with respect to the fourth butting 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 end face of the support column.
  • the second aluminum alloy mainly on the sealing body side of the first butt portion is agitated and plastically fluidized by the frictional heat between the sealing body and the stirring pin, and the step side surface and the seal are sealed in the first butt portion.
  • the outer peripheral side surface of the body can be joined.
  • only the stirring pin is brought into contact with only the sealing body to perform frictional stirring, so that the first aluminum alloy is hardly mixed into the sealing body from the jacket body.
  • only the stirring pin is kept in slight contact with the end face of the support column.
  • the 2nd aluminum alloy by the side of a sealing body is mainly friction-stirred, the fall of joining strength can be suppressed.
  • the step side surface of the jacket body is inclined outward, contact between the stirring pin and the jacket body can be easily avoided without causing a decrease in bonding strength.
  • the strength of the liquid cooling jacket can be increased by joining the support column and the sealing body.
  • the metal shortage of a junction part can be prevented by enlarging the plate
  • the friction stir is performed in a state where the stirring pin is slightly in contact with the step bottom surface of the peripheral wall step portion.
  • the joint strength of the second butt portion can be increased.
  • the stirring pin has a flat surface perpendicular to the rotation center axis at the tip, and has a protrusion on the flat surface, and in the second main joining step, only the rotating stirring pin is sealed. Inserted into the body, and the flat surface of the stirring pin is in contact with only the sealing body, while the protrusion of the stirring pin is in contact with the end surface of the support column, the friction against the fourth butting portion It is preferable to perform stirring.
  • the stirring pin since the stirring pin has a flat surface and a protrusion protruding on the flat surface, the plastic that is frictionally stirred along the protrusion and wound up on the protrusion.
  • the fluidized material is held down on a flat surface. Accordingly, the periphery of the protrusion can be more reliably frictionally stirred, and the oxide film at the interface can be reliably divided, so that the bonding strength can be increased.
  • the present invention includes a jacket body having a bottom portion, a peripheral wall portion rising from a peripheral edge of the bottom portion, and a support column rising from the bottom portion, a recess into which a tip of the support column is inserted, and sealing an opening portion of the jacket body.
  • a liquid cooling jacket manufacturing method comprising: a sealing body, wherein the jacket body and the sealing body are joined by friction stir, wherein the jacket body is formed of a first aluminum alloy, The body is made of a second aluminum alloy, the first aluminum alloy is a material having a hardness higher than that of the second aluminum alloy, and the outer peripheral surface of the stirring pin of the rotary tool used for friction stirring is tapered.
  • a stepped portion having a stepped bottom surface and a stepped side surface rising from the stepped bottom surface, and a plate of the sealing body.
  • the rotary tool In a state where the step is slightly in contact with the step side surface of the peripheral wall portion, the rotary tool is moved along the first abutting portion, and the second aluminum alloy of the sealing body is caused to flow into the gap.
  • the first main joining step for stirring only the rotating stirring pin is inserted into the sealing body, and the stirring pin is in slight contact with the end face of the support column, with respect to the fourth butted portion.
  • a second main joining step in which friction stirring is performed.
  • the second aluminum alloy mainly on the sealing body side of the first butt portion is agitated and plastically fluidized by the frictional heat between the sealing body and the stirring pin, and the step side surface and the seal are sealed in the first butt portion.
  • the outer peripheral side surface of the body can be joined.
  • the outer peripheral surface of the stirring pin is kept in slight contact with the stepped side surface of the jacket body, mixing of the first aluminum alloy from the jacket body to the sealing body can be minimized.
  • the stirring pin is kept in slight contact with the end face of the support column also in the fourth butting portion, it is possible to minimize the mixing of the first aluminum alloy from the jacket body into the sealing body.
  • the 2nd aluminum alloy by the side of a sealing body is mainly friction-stirred, the fall of joining strength can be suppressed.
  • the step side surface of the jacket main body is inclined outward, the first butting portion can be joined without the agitation pin entering the jacket main body side greatly.
  • the strength of the liquid cooling jacket can be increased by joining the support column and the sealing body.
  • the metal shortage of a junction part can be prevented by enlarging the plate
  • the friction stir is performed in a state where the stirring pin is slightly in contact with the step bottom surface of the peripheral wall step portion.
  • the joint strength of the second butt portion can be increased.
  • the stirring pin has a flat surface perpendicular to the rotation center axis at the tip, and has a protrusion on the flat surface, and in the second main joining step, only the rotating stirring pin is sealed. Inserted into the body, and the flat surface of the stirring pin is in contact with only the sealing body, while the protrusion of the stirring pin is in contact with the end surface of the support column, the friction against the fourth butting portion It is preferable to perform stirring.
  • the stirring pin since the stirring pin has a flat surface and a protrusion protruding on the flat surface, the plastic that is frictionally stirred along the protrusion and wound up on the protrusion.
  • the fluidized material is held down on a flat surface. Accordingly, the periphery of the protrusion can be more reliably frictionally stirred, and the oxide film at the interface can be reliably divided, so that the bonding strength can be increased.
  • a temporary joining step of temporarily joining the first butted portion is included prior to the first main joining step.
  • the jacket body may be formed by die casting, 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.
  • the jacket body and the sealing body can be made flat and the liquid cooling jacket can be flattened by utilizing heat shrinkage.
  • the deformation amount of the jacket body is measured in advance, and the insertion depth of the stirring pin of the rotary tool is adjusted in accordance with the deformation amount in the first main joining step and the second main joining step. It is preferable to perform friction stirring.
  • the length and width of the plasticized region formed in the liquid cooling jacket can be made constant. it can.
  • a cooling plate through which a cooling medium flows is installed on the back side of the bottom portion, and the jacket main body and the sealing body are cooled by the cooling plate while friction is performed. It is preferable to perform stirring.
  • the surface of the cooling plate and the back surface of the bottom portion are in surface contact. According to this manufacturing method, the cooling efficiency can be increased.
  • the cooling plate has a cooling flow path through which the cooling medium flows, and the cooling flow path has a planar shape along a movement locus of the rotary tool in the first main joining step.
  • the friction stir part can be intensively cooled, so that the cooling efficiency can be further increased.
  • the cooling flow path through which the cooling medium flows is constituted by a cooling pipe embedded in the cooling plate. According to this manufacturing method, the cooling medium can be easily managed.
  • a cooling medium is allowed to flow through a hollow portion constituted by the jacket main body and the sealing body, and the jacket main body and the sealing body are cooled. It is preferable to perform friction stirring.
  • the frictional heat can be kept low, the deformation of the liquid cooling jacket due to thermal contraction can be reduced. Further, the jacket body itself can be used for cooling without using a cooling plate or the like.
  • a liquid cooling jacket 1 is manufactured by friction stir welding a jacket body 2 and a sealing body 3.
  • the liquid cooling jacket 1 is a member that installs a heating element (not shown) on the sealing body 3 and exchanges heat with the heating element by flowing a fluid therein.
  • “front surface” means a surface opposite to the “back surface”.
  • the manufacturing method of the liquid cooling jacket according to the present embodiment performs a preparation step, a placing step, a first main joining step, and a second main joining step.
  • the preparation process is a process of preparing the jacket body 2 and the sealing body 3.
  • the jacket body 2 is mainly composed of a bottom portion 10, a peripheral wall portion 11, and a plurality of support columns 15.
  • the jacket body 2 is formed mainly including a first aluminum alloy.
  • As the first aluminum alloy for example, an aluminum alloy casting material such as JISH5302 ADC12 (Al—Si—Cu system) is used.
  • the bottom 10 is a plate-like member that has a rectangular shape in plan view.
  • the peripheral wall portion 11 is a wall portion that rises in a rectangular frame shape from the peripheral edge portion of the bottom portion 10.
  • a peripheral wall step portion 12 is formed on the inner peripheral edge of the peripheral wall portion 11.
  • the peripheral wall step portion 12 includes a step bottom surface 12a and a step side surface 12b rising from the step bottom surface 12a.
  • the step side surface 12b is inclined so as to spread outward from the step bottom surface 12a toward the opening.
  • the inclination angle ⁇ of the step side surface 12b may be set as appropriate, and is, for example, 3 ° to 30 ° with respect to the vertical surface.
  • a recess 13 is formed at the bottom 10 and the peripheral wall 11.
  • the support column 15 stands vertically from the bottom 10. Although the number of the support
  • the shape of the protrusion 16 is not particularly limited, but in the present embodiment, it is a columnar shape. The height from the end surface of the protrusion 16 is substantially half of the thickness of the sealing body 3.
  • a column step portion 17 is formed on the tip side of the column 15.
  • the columnar stepped portion 17 is composed of a step bottom surface 17a and a step side surface 17b rising from the step bottom surface 17a.
  • the step bottom surface 17 a is formed at the same height as the step bottom surface 12 a of the peripheral wall step 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 step side surface 12b.
  • a recess 4 is formed in the sealing body 3 at a position corresponding to the support column 15.
  • the recessed part 4 is opened toward the lower side, and is formed so that the protruding part 16 is fitted with almost no gap.
  • the sealing body 3 is formed mainly including a second aluminum alloy.
  • the second aluminum alloy is a material having a lower hardness than the first aluminum alloy.
  • the second aluminum alloy is made of, for example, a wrought aluminum alloy such as JIS A1050, A1100, A6063.
  • the placing step is a step of placing the sealing body 3 on the jacket body 2 as shown in FIG.
  • the back surface 3b of the sealing body 3 is mounted on the step bottom surface 12a.
  • the step side surface 12b and the outer peripheral side surface 3c of the sealing body 3 are butted to form the first butted portion J1.
  • the first butting portion J1 is 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 first butting portion J1 is abutted with a gap having a substantially V-shaped cross section as in this embodiment. May be included.
  • the step bottom surface 12a and the back surface 3b of the sealing body 3 are abutted to form the second abutting portion J2.
  • the end surface 11a of the peripheral wall portion 11 and the surface 3a of the sealing body 3 are flush with each other.
  • step-difference part 17 are abutted by the mounting process, and the 3rd abutting part J3 is formed. Further, the bottom surface 4b of the recess 4 and the tip end surface 16a of the protrusion 16 of the support column 15 (end surface of the support column 15) are abutted to form a fourth abutting portion J4.
  • the first main joining step is a step of friction stir welding the first butt portion J1 using the rotary tool F as shown in FIGS.
  • the rotary tool F includes a connecting portion F1 and a stirring pin F2.
  • the rotary tool F is made of, for example, tool steel.
  • the connection part F1 is a part connected to the rotating shaft of a friction stirrer (not shown).
  • the connecting portion F1 has a cylindrical shape, and is formed with a screw hole (not shown) in which a bolt is fastened.
  • the stirring pin F2 hangs down from the connecting part F1, and is coaxial with the connecting part F1.
  • the stirring pin F2 is tapered as it is separated from the connecting portion F1.
  • a flat surface F3 that is perpendicular to the rotation center axis C and is flat is formed at the tip of the stirring pin F2.
  • the flat surface F3 includes a protrusion F4 that protrudes downward along the rotation center axis C.
  • the shape of the protrusion F4 is not particularly limited, but in the present embodiment, it is a columnar shape. That is, the outer surface of the stirring pin F2 is composed of a tapered outer peripheral surface, a flat surface F3 formed at the tip, a side surface of the protrusion F4, and a tip surface F5.
  • the inclination angle ⁇ formed by the rotation center axis C and the outer peripheral surface of the stirring pin F2 may be set as appropriate within a range of 5 ° to 30 °, for example. Is set to be the same as the inclination angle ⁇ of the step side surface 12b.
  • a spiral groove is engraved on the outer peripheral surface of the stirring pin F2.
  • the spiral groove in order to rotate the rotary tool F to the right, is formed in a 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.
  • the spiral groove when rotating the rotation tool F counterclockwise, it is preferable to form the spiral groove clockwise as it goes from the proximal end to the distal end.
  • the spiral groove in this case is formed clockwise when viewed from above when the spiral groove is traced from the proximal end to the distal end.
  • the rotating stirring pin F2 (not including the connecting portion F1) is inserted into the sealing body 3, and the stirring pin F2 is moved along the first abutting portion J1.
  • the outer peripheral surface of the stirring pin F2 is not brought into contact with the step side surface 12b of the peripheral wall step portion 12, and the protrusion F4 of the stirring pin F2 is further brought into contact with the step bottom surface 12a of the peripheral wall step portion 12.
  • the insertion depth and position of the stirring pin F2 are set.
  • the flat surface F3 of the stirring pin F2 is not in contact with the step bottom surface 12a of the peripheral wall step portion 12.
  • the front end surface F5 of the protrusion F4 of the stirring pin F2 comes into contact with the peripheral wall 11.
  • the state in which the outer peripheral surface of the stirring pin F2 is not in contact with the step side surface 12b of the peripheral wall step portion 12 means that the outer peripheral surface of the stirring pin F2 is in contact with the jacket main body 2 during friction stirring. This may include a case where the distance between the outer peripheral surface of the stirring pin F2 and the step side surface 12b is zero.
  • the flat surface F3 of the stirring pin F2 does not contact the step bottom surface 12a of the peripheral wall step portion 12 means that the flat surface F3 of the stirring pin F2 contacts the jacket body 2 when performing frictional stirring. This may include a case where the distance between the flat surface F3 of the stirring pin F2 and the step bottom surface 12a is zero.
  • the separation distance L from the step side surface 12b to the outer peripheral surface of the stirring pin F2 may be set as appropriate depending on the material of the jacket body 2 and the sealing body 3, but the outer peripheral surface of the stirring pin F2 is set to the step side surface 12b as in the present embodiment.
  • 0 ⁇ L ⁇ 0.5 mm is set, and preferably 0 ⁇ L ⁇ 0.3 mm.
  • the flat surface F3 of the stirring pin F2 is located above the step bottom surface 12a and is not in contact with the step bottom surface 12a, and the tip surface F5 of the protrusion F4 enters the step bottom surface 12a of the peripheral wall step portion 12. Yes.
  • FIG. 5 is a cross-sectional view of the joint after the first main joining process according to the present embodiment.
  • the plasticized region W1 is formed on the sealing body 3 side with the first butted portion J1 as a boundary.
  • the plasticized region W1 is formed so as to reach the jacket body 2 beyond the second butted portion J2.
  • the second main joining step is a step of friction stir welding the fourth butted portion J4 using the rotary tool F as shown in FIGS.
  • the second main joining step as shown in FIG. 6, only the stirring pin F2 rotated clockwise 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 from each other. Move while moving. In other words, frictional stirring is performed with the base end portion of the stirring pin F2 exposed.
  • a plasticized region W2 is formed by hardening the friction-stirred metal.
  • the flat surface F3 of the stirring pin F2 is not in contact with the tip surface 16a, but the tip surface F5 of the protrusion F4 of the stirring pin F2 is inserted into the tip surface 16a of the protrusion 16 of the support column 15.
  • the plasticized region W2 is formed so as to reach the fourth butted portion J4.
  • the stirring pin F2 of the rotary tool F and the step side surface 12b of the peripheral wall step portion 12 are not in contact, but the sealing body 3 and the stirring pin F2 are used.
  • the second aluminum alloy mainly on the sealing body 3 side of the first butted portion J1 is agitated and plastically fluidized by the frictional heat between the stepped side surface 12b and the outer peripheral side surface 3c of the sealing body 3 at the first butting portion J1. Can be joined.
  • friction stirring is performed by bringing only the stirring pin F2 into contact with only the sealing body 3, the first aluminum alloy is hardly mixed from the jacket body 2 to the sealing body 3.
  • matching part J1 since the 2nd aluminum alloy by the side of the sealing body 3 is mainly friction-stirred, the fall of joint strength can be suppressed.
  • the step side surface 12b of the jacket body 2 is inclined outward, so that contact between the stirring pin F2 and the jacket body 2 can be easily avoided.
  • the stirring pin F2 While avoiding contact with the step side surface 12b, the stirring pin F2 and the step side surface 12b can be brought as close as possible.
  • the stirring pin F2 is brought into contact with only the sealing body 3 to perform friction stir welding, so that the stirring pin is provided on one side and the other side with respect to the rotation center axis C of the stirring pin F2.
  • the material resistance imbalance experienced by F2 can be eliminated. Thereby, since a plastic fluidized material is friction-stirred with sufficient balance, the fall of joining strength can be suppressed.
  • the rotation direction and the traveling direction of the rotary tool F may be set as appropriate, but the jacket body 2 side is the shear side in the plasticizing region W1 formed in the movement locus of the rotary tool F.
  • the rotation direction and the traveling direction of the rotary tool F were set so that the sealing body 3 side was the flow side.
  • the stirring action by the stirring pin F2 around the first butting portion J1 is increased, and a temperature increase at the first butting portion J1 can be expected.
  • the step side surface 12b and the outer peripheral side surface 3c of the sealing body 3 can be more reliably joined.
  • the shear side means the side where the relative speed of the outer periphery of the rotating tool with respect to the welded portion is a value obtained by adding the moving speed to the size of the tangential speed on the outer periphery of the rotating tool.
  • the flow side refers to a side where the relative speed of the rotating tool with respect to the bonded portion is reduced by rotating the rotating tool in the direction opposite to the moving direction of the rotating tool.
  • the first aluminum alloy of the jacket body 2 is a material having higher hardness than the second aluminum alloy of the sealing body 3. Thereby, durability of the liquid cooling jacket 1 can be improved.
  • the first aluminum alloy of the jacket body 2 is preferably an aluminum alloy cast material
  • the second aluminum alloy of the sealing body 3 is preferably an aluminum alloy wrought material.
  • the first aluminum alloy as an Al—Si—Cu-based aluminum alloy casting material such as JISH5302 ADC12, for example, the castability, strength, machinability, etc. of the jacket body 2 can be improved.
  • workability and heat conductivity can be improved by making a 2nd aluminum alloy into JIS A1000 type
  • the flat surface F3 of the stirring pin F2 is not inserted deeper than the step bottom surface 12a, but joining is performed by allowing the plasticized region W1 to reach the second butting portion J2. Strength can be increased.
  • the plastic fluid material that is frictionally stirred along the protrusion F4 and wound up on the protrusion F4 is a flat surface. Pressed with F3.
  • the periphery of the protrusion F4 (around the second abutting portion J2) can be friction-stirred more reliably, and the oxide film of the second abutting portion J2 is reliably divided.
  • matching part J2 can be raised.
  • the plasticized region W1 is compared with the case where the flat surface F3 is inserted deeper than the second abutting part J2.
  • the width of can be reduced. Thereby, it is possible to prevent the plastic fluid material from flowing out into the recess 13 and to set the width of the step bottom surface 12a to be small.
  • the flat surface F3 of the stirring pin F2 is brought into contact with only the sealing body 3, and the protruding portion F4 of the stirring pin F2 is connected to the end surface of the support column 15 (the tip surface 16a of the protruding portion 16).
  • Friction stirring is performed on the fourth butted portion J4 in the contact state.
  • the material is held down by the flat surface F3.
  • the periphery of the protrusion F4 (around the fourth abutting portion J4) can be frictionally stirred more reliably, and the oxide film of the fourth abutting portion J4 is surely divided.
  • the joint strength of the fourth butted portion J4 can be further increased.
  • the sealing body 3 can be easily positioned with respect to the jacket body 2.
  • first main bonding step or the second main bonding step may be performed first.
  • By performing the temporary joining step it is possible to prevent the opening of the first butted portion J1 during the first main joining step.
  • the plate thickness of the sealing body 3 may be set to be larger than the height dimension of the step side surface 12 b of the peripheral wall step portion 12. Since the first butting portion J1 is formed so as to have a gap, there is a possibility that the joining portion may be short of metal, but the shortage of metal can be compensated by using the first modification. By increasing the plate thickness of the sealing body 3, the heat exchange efficiency can be increased.
  • the peripheral wall (inner wall) 4 a of the concave portion 4 of the sealing body 3 and the step side surface 17 b (side peripheral surface of the protruding portion 16) of the column stepped portion 17 are inclined.
  • a tapered inclined surface may be provided.
  • the inclined surface of the concave portion 4 is inclined so that the concave portion 4 is reduced in diameter toward the bottom surface 4b.
  • the protruding portion 16 is inclined so as to be reduced in diameter toward the tip.
  • the manufacturing method of the liquid cooling jacket which concerns on 2nd embodiment of this invention performs a preparatory process, a mounting process, a 1st main joining process, and a 2nd main joining process.
  • the preparation process, the placing process, and the second main joining process are the same as those in the first embodiment, and thus the description thereof is omitted.
  • it demonstrates centering on the part which is different from 1st embodiment.
  • the first main joining step is a step of friction stir welding the first butt joint J1 using the rotary tool F as shown in FIG.
  • the main joining step when the stirring pin F2 is relatively moved along the first abutting portion J1, the outer peripheral surface of the stirring pin F2 is slightly brought into contact with the step side surface 12b of the peripheral wall step portion 12, and the flat surface F3 is formed. Friction stir welding is performed so as not to contact the step bottom surface 12a. Further, the front end face F5 of the protrusion F4 of the stirring pin F2 comes into contact with the peripheral wall 11.
  • the contact amount of the outer peripheral surface of the stirring pin F2 with respect to the step side surface 12b is defined as an offset amount N.
  • the offset amount N is set to 0 ⁇ N ⁇ 0. Set between .5 mm, preferably between 0 ⁇ N.ltoreq.0.25 mm.
  • the stirring pin F2 receives on one side and the other side across the rotation center axis C. Material resistance is also very different. For this reason, the plastic fluidized material is not agitated in a well-balanced manner, which has been a factor in reducing the bonding strength.
  • the contact allowance between the outer peripheral surface of the stirring pin F2 and the jacket body 2 is made as small as possible, the material resistance that the stirring pin F2 receives from the jacket body 2 can be made as small as possible.
  • the inclination angle ⁇ of the step side surface 12b of the peripheral wall step portion 12 and the inclination angle ⁇ 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 allowance between the stirring pin F2 and the step side surface 12b can be made uniform over the height direction.
  • the thickness of the sealing body 3 may be increased or an inclined surface may be provided on the side surface as in the first and second modifications of the first embodiment. Moreover, you may apply 5th embodiment mentioned later in a 2nd main joining process.
  • the manufacturing method of the liquid cooling jacket which concerns on 3rd embodiment of this invention performs a preparatory process, a mounting process, a 1st main joining process, and a 2nd main joining process.
  • a preparation process, a mounting process, and a 2nd main joining process are equivalent to 1st embodiment, description is abbreviate
  • a description will be given focusing on portions that are different from the first embodiment.
  • the first main joining step is a step of friction stir welding the jacket main body 2 and the sealing body 3 using the rotary tool F as shown in FIG.
  • the main joining step when the stirring pin F2 is relatively moved along the first abutting portion J1, the outer peripheral surface of the stirring pin F2 is not brought into contact with the step side surface 12b, and the flat surface F3 is deeper than the step bottom surface 12a.
  • the friction stir welding is performed in a state where the step is inserted and slightly brought into contact with the step bottom surface 12 a of the peripheral wall step portion 12.
  • the entire protrusion F4 is inserted into the step bottom surface 12a.
  • the stir pin F2 and the step side surface 12b of the peripheral wall step portion 12 are not in contact with each other, but the first butt is caused by frictional heat between the sealing body 3 and the stir pin F2.
  • the second aluminum alloy mainly on the sealing body 3 side of the portion J1 is agitated and plastically fluidized, and the stepped side surface 12b and the outer peripheral side surface 3c of the sealing body 3 can be joined at the first butt portion J1.
  • only the stirring pin F2 is brought into contact with only the sealing body 3 to perform frictional stirring, so that the first aluminum alloy is hardly mixed from the jacket body 2 into the sealing body 3.
  • matching part J1 since the 2nd aluminum alloy by the side of the sealing body 3 is mainly friction-stirred, the fall of joint strength can be suppressed.
  • the stirring pin F2 since the step side surface 12b of the jacket body 2 is inclined outward, the contact between the stirring pin F2 and the step side surface 12b can be easily avoided.
  • the separation distance L is set, for example, to 0 ⁇ L ⁇ 0.5 mm, preferably 0 ⁇ L ⁇ 0.3 mm.
  • the lower part of the joint can be frictionally stirred more reliably. Thereby, it is possible to prevent the occurrence of a cavity defect or the like in the plasticized region W1 and increase the bonding strength.
  • the entire flat surface F3 of the stirring pin F2 is located closer to the center of the sealing body 3 than the outer peripheral side surface 3c of the sealing body 3. Thereby, since the joining area
  • the metal of the peripheral wall 11 is wound up by the protrusion F4 and pressed by the flat surface F3. Thereby, the metal of the surrounding wall part 11 can be stirred efficiently.
  • the thickness of the sealing body 3 may be increased or an inclined surface may be provided on the side surface as in the first and second modifications of the first embodiment. Moreover, you may apply 5th embodiment mentioned later in a 2nd main joining process.
  • the first main joining step is a step of friction stir welding of the first butting portion J1 using the rotary tool F as shown in FIG.
  • the main joining step when the stirring pin F2 is relatively moved along the first abutting portion J1, the outer peripheral surface of the stirring pin F2 is slightly brought into contact with the step side surface 12b of the peripheral wall step portion 12, and the flat surface F3 is formed. Friction stir welding is performed in a state of being inserted deeper than the step bottom surface 12 a and slightly contacting the step bottom surface 12 a of the peripheral wall step portion 12. The entire protrusion F4 is inserted into the step bottom surface 12a.
  • the contact amount of the outer peripheral surface of the stirring pin F2 with respect to the step side surface 12b is defined as an offset amount N.
  • the offset amount N Is set between 0 ⁇ N ⁇ 1.0 mm, preferably between 0 ⁇ N ⁇ 0.85 mm, and more preferably between 0 ⁇ N ⁇ 0.65 mm.
  • the stirring pin F2 receives on one side and the other side across the rotation center axis C. Material resistance is also very different. For this reason, the plastic fluidized material is not agitated in a well-balanced manner, which has been a factor in reducing the bonding strength.
  • the contact allowance between the outer peripheral surface of the stirring pin F2 and the jacket body 2 is made as small as possible, the material resistance that the stirring pin F2 receives from the jacket body 2 can be reduced.
  • the stirring pin F2 since the inclination angle ⁇ of the step side surface 12b and the inclination angle ⁇ 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 stirring pin F2 The contact allowance with the step side surface 12b can be made uniform over the height direction. Thereby, in this embodiment, since a plastic fluid material is stirred with sufficient balance, the strength reduction of a junction part can be suppressed.
  • the lower part of the joint can be frictionally stirred more reliably. Thereby, it is possible to prevent the occurrence of a cavity defect or the like in the plasticized region W1 and increase the bonding strength. That is, both the first butting portion J1 and the second butting portion J2 can be firmly joined.
  • the metal of the peripheral wall 11 is wound up by the protrusion F4 and pressed by the flat surface F3. Thereby, the metal of the surrounding wall part 11 can be stirred efficiently.
  • the thickness of the sealing body 3 may be increased, or an inclined surface may be provided on the side surface. Moreover, you may apply 5th embodiment mentioned later in a 2nd main joining process.
  • the friction stir welding is performed in a state where the flat surface F3 of the stirring pin F2 is slightly in contact with the front end surface 16a of the protruding portion 16 of the support column 15 (end surface of the support column 15). Do.
  • the entire protrusion F4 is inserted into the protrusion 16.
  • the stirring pin F ⁇ b> 2 is relatively moved along the outer peripheral edge of the recess 4.
  • the rotating tool F makes a round along the outer peripheral edge portion of the protruding portion 16
  • the start end and the end end of the plasticizing region W2 are overlapped.
  • the plasticized region W2 is formed so as to reach the fourth butted portion J4.
  • the flat surface F3 of the stirring pin F2 is inserted in contact with the end surface (the front end surface 16a) of the support column 15 so that the lower portion of the fourth butted portion J4. Can be more reliably frictionally stirred. Thereby, it is possible to prevent the occurrence of a cavity defect or the like in the plasticized region W2 and increase the bonding strength.
  • the metal of the support column 15 is wound up by the protrusion F4 and pressed by the flat surface F3. Thereby, the metal of the support
  • the manufacturing method of the liquid cooling jacket which concerns on the 4th modification of 1st embodiment is demonstrated.
  • the fourth modified example is different from the first embodiment in that a temporary joining step, a first main joining step, and a second main joining step are performed using a cooling plate.
  • a description will be given centering on portions that are different from the first embodiment.
  • the jacket body 2 is fixed to the table K when the fixing process is performed.
  • the table K is configured by 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 that restrains the jacket body 2 from being immovable and functions as a “cooling plate” in the claims.
  • the cooling pipe WP is a tubular member embedded in the substrate K1.
  • a cooling medium for cooling the substrate K1 flows in the cooling pipe WP.
  • 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 fourth modified example, it is a planar shape along the movement locus of the rotary tool F in the first main joining process. Yes. That is, the cooling pipe WP is disposed so that the cooling pipe WP and the first abutting portion J1 substantially overlap when viewed in plan.
  • the cooling flow path and the first abutting portion J1 overlap each other when viewed in a plan view. It is possible to intensively cool the part where the water is generated Thereby, cooling efficiency can be improved.
  • the cooling pipe WP is provided to distribute the cooling medium, the management of the cooling medium becomes easy. Further, since the table K (cooling plate) and the jacket body 2 are in surface contact, the cooling efficiency can be increased.
  • the friction stir welding may be performed while flowing the cooling medium inside the jacket main body 2.
  • the manufacturing method of the liquid cooling jacket which concerns on the 5th modification of 1st embodiment is demonstrated.
  • the first main body 2 is curved so that the surface side of the jacket body 2 and the surface 3a of the sealing body 3 are convex. It differs from the first embodiment in that the joining step and the second main joining step are performed.
  • the fifth modification will be described with a focus on the differences from the first embodiment.
  • the fifth modification uses a table KA.
  • the table KA includes a substrate KA1 having a rectangular parallelepiped shape, a spacer KA2 formed at the center of the substrate KA1, and clamps KA3 formed at four corners of the substrate KA1.
  • the spacer KA2 may be integral with or separate from the substrate KA1.
  • the jacket body 2 and the sealing body 3 integrated by performing a temporary joining step are fixed to the table KA by the clamp KA3.
  • the plasticized region W is formed by the temporary joining process.
  • FIG. 16A when the jacket body 2 and the sealing body 3 are fixed to the table KA, the bottom portion 10, the end surface 11a of the jacket body 2 and the surface 3a of the sealing body 3 are curved so as to be convex upward. . 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. To bend.
  • friction stir welding is performed using the rotary tool F.
  • the deformation amount of at least one of the jacket 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.
  • Friction stir welding is performed. That is, it is moved along the curved surfaces of the end surface 11a of the jacket body 2 and the surface 3a of the sealing body 3 so that the movement locus of the rotary tool F becomes a curve. By doing in this way, the depth and width
  • the sealing body 3 side of the liquid cooling jacket 1 may be deformed into a concave shape, but the first main joining process of the fifth modification example According to the second main joining step, since the jacket 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, the heat shrinkage after the friction stir welding is performed. By using it, the liquid cooling jacket 1 can be made flat. Further, when the main joining process is performed with a conventional rotating tool, if the jacket body 2 and the sealing body 3 are warped in a convex shape, the shoulder portion of the rotating tool comes into contact with the jacket body 2 and the sealing body 3, and the operation is performed.
  • the jacket body 2 and the sealing body 3 are curved so that all of the first side portion 21 to the fourth side portion 24 are curved, but the present invention is not limited to this.
  • the first side 21 and the second side 22 may be curved so that the third side 23 and the fourth side 24 are curved.
  • the first side 21 and the second side 22 may be curved, and the third side 23 and the fourth side 24 may be curved.
  • the height position of the stirring pin F2 is changed according to the deformation amount of the jacket body 2 or the sealing body 3, but the main joining step with the height of the stirring pin F2 with respect to the table KA being constant. May be performed.
  • the spacer KA2 may have any shape as long as it can be fixed so that the surface sides of the jacket body 2 and the sealing body 3 are convex. Further, the spacer KA2 may be omitted as long as the front surface side of the jacket body 2 and the sealing body 3 can be fixed in a convex shape. Further, the rotary tool F may be attached to, for example, a robot arm provided with a rotation driving means such as a spindle unit at the tip. According to such a configuration, the rotation center axis of the rotary tool F can be easily changed to various angles.
  • the jacket body 2 and the sealing body 3 are formed by die casting so that the surface sides of the jacket body 2 and the sealing body 3 are curved in a convex shape.
  • the jacket main body 2 is formed so that the bottom portion 10 and the peripheral wall portion 11 are convex on the surface side.
  • the temporarily bonded jacket body 2 and sealing body 3 are fixed to the table KB when performing the fixing step.
  • the table KB is composed of a substrate KB1 having a rectangular parallelepiped shape, a spacer KB2 disposed in 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.
  • 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 that is curved so as to be convex upward, and rising surfaces KB2b and KB2b that are formed at both ends of the curved surface KB2a and rise from the substrate KB1.
  • the first side Ka and the second side Kb of the spacer KB2 are curved, and the third side Kc and the fourth side Kd are straight lines.
  • the cooling pipe WP is a tubular member embedded in 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 path through which the cooling medium flows is not particularly limited, but in the sixth modified example, it is a planar shape along the movement locus of the rotary tool F in the first main joining process. Yes. That is, the cooling pipe WP is disposed so that the cooling pipe WP and the first abutting portion J1 substantially overlap when viewed in plan.
  • the jacket body 2 and the sealing body 3 integrated by temporary joining are fixed to the table KB by the clamp KB3. More specifically, the jacket body 2 is fixed to the table KB so that the back surface of the bottom portion 10 is in surface contact with the curved surface KB2a.
  • 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 and the wall 11D of the wall 11C.
  • the fourth side 24 is curved so as to be a straight line.
  • friction stir welding is performed on the first butting portion J1 and the second butting portion J2 using the rotary tool F, respectively.
  • the deformation amount of at least one of the jacket 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.
  • Friction stir welding is performed. That is, it is moved along the end surface 11a of the jacket body 2 and the surface 3a of the sealing body 3 so that the movement locus of the rotary tool F becomes a curve or a straight line. By doing in this way, the depth and width
  • the sealing body 3 side of the liquid cooling jacket 1 may be deformed into a concave shape, but the first main joining process of the sixth modification example According to the second main joining step, since the jacket 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 heat shrinkage after the friction stir welding. Can do.
  • the curved surface KB2a of the spacer KB2 is brought into surface contact with the concave back surface of the bottom portion 10 of the jacket body 2.
  • friction stir welding can be performed while cooling the jacket main body 2 and the sealing body 3 more effectively. Since the frictional heat in the friction stir welding can be kept low, the deformation of the liquid cooling jacket due to the heat shrinkage can be reduced. Thereby, in a preparatory process, when forming the jacket main body 2 and the sealing body 3 in convex shape, the curvature of the jacket main body 2 and the sealing body 3 can be made small.
  • the jacket body 2 and the sealing body 3 are curved so that the first side 21 and the second side 22 are curved, but the present invention is not limited to this.
  • the spacer KB2 having a spherical surface may be formed, and the back surface of the bottom portion 10 of the jacket body 2 may be in surface contact with the spherical surface.
  • all of the first side portion 21 to the fourth side portion 24 are curved.
  • the height position of the stirring pin F2 is changed according to the deformation amount of the jacket body 2 or the sealing body 3, but the main joining step with the height of the stirring pin F2 with respect to the table KB being constant. May be performed.
  • the manufacturing method of the liquid cooling jacket which concerns on 6th embodiment of this invention is demonstrated in detail with reference to drawings.
  • the jacket body 2 and the sealing body 203 are friction stir welded to manufacture the liquid cooling jacket 1.
  • the liquid cooling jacket 1 is a member that installs a heating element (not shown) on the sealing body 203 and exchanges heat with the heating element by flowing a fluid therein.
  • “front surface” means a surface opposite to the “back surface”.
  • the manufacturing method of the liquid cooling jacket according to the present embodiment performs a preparation step, a placing step, a first main joining step, and a second main joining step.
  • the preparation step is a step of preparing the jacket body 2 and the sealing body 203.
  • the jacket body 2 is mainly composed of a bottom portion 10, a peripheral wall portion 11, and a plurality of support columns 15.
  • the jacket body 2 is formed mainly including a first aluminum alloy.
  • the first aluminum alloy for example, an aluminum alloy casting material such as JISH5302 ADC12 (Al—Si—Cu system) is used.
  • the bottom 10 is a plate-like member that has a rectangular shape in plan view.
  • the peripheral wall portion 11 is a wall portion that rises in a rectangular frame shape from the peripheral edge portion of the bottom portion 10.
  • a peripheral wall step portion 12 is formed on the inner peripheral edge of the peripheral wall portion 11.
  • the peripheral wall step portion 12 includes a step bottom surface 12a and a step side surface 12b rising from the step bottom surface 12a.
  • the step side surface 12b is inclined so as to spread outward from the step bottom surface 12a toward the opening.
  • the inclination angle ⁇ of the step side surface 12b may be set as appropriate, and is, for example, 3 ° to 30 ° with respect to the vertical surface.
  • a recess 13 is formed at the bottom 10 and the peripheral wall 11.
  • the support column 15 stands vertically from the bottom 10.
  • pillar 15 is not restrict
  • pillar 15 is a column shape in this embodiment, another shape may be sufficient.
  • a protrusion 16 is formed at the tip of the column 15.
  • the shape of the protrusion 16 is not particularly limited, but in the present embodiment, it is a columnar shape.
  • the height of the protruding portion 16 is substantially half the plate thickness of the sealing body 203.
  • a columnar step 17 is formed on the tip side of the column 15.
  • the columnar stepped portion 17 includes a stepped bottom surface 17a and a stepped side surface (side surface of the protruding portion 16) 17b rising from the stepped bottom surface 17a.
  • the step bottom surface 17 a is formed at the same height as the step bottom surface 12 a of the peripheral wall step portion 12.
  • the sealing body 203 is a plate-like member that seals the opening of the jacket body 2.
  • the sealing body 203 is sized to be placed on the peripheral wall step portion 12.
  • board thickness of the sealing body 203 is larger than the level
  • a recess 4 is formed at a position corresponding to the column 15.
  • the recessed part 4 is opened toward the lower side, and is formed so that the protruding part 16 is fitted with almost no gap.
  • the sealing body 203 is formed mainly including a second aluminum alloy.
  • the second aluminum alloy is a material having a lower hardness than the first aluminum alloy.
  • the second aluminum alloy is made of, for example, a wrought aluminum alloy such as JIS A1050, A1100, A6063.
  • the placing step is a step of placing the sealing body 203 on the jacket body 2 as shown in FIG.
  • the back surface 203b of the sealing body 203 is mounted on the step bottom surface 12a.
  • the step side surface 12b and the outer peripheral side surface 203c of the sealing body 203 are abutted to form a first abutting portion J1.
  • the first butting portion J1 is both when the step side surface 12b and the outer peripheral side surface 203c of the sealing body 203 are in surface contact with each other and when they are abutted with a substantially V-shaped gap as in this embodiment. May be included.
  • the step bottom surface 12a and the back surface 203b of the sealing body 203 are butted to form the second butted portion J2.
  • step-difference part 17 are abutted by the mounting process, and the 3rd abutting part J3 is formed. Further, the bottom surface 4b of the recess 4 and the tip end surface 16a of the protrusion 16 of the support column 15 (end surface of the support column 15) are abutted to form a fourth abutting portion J4.
  • the first main joining step is a step of friction stir welding the first abutting portion J1 using the rotary tool F as shown in FIGS.
  • the rotary tool F includes a connecting portion F1 and a stirring pin F2.
  • the rotary tool F is made of, for example, tool steel.
  • the connection part F1 is a part connected to the rotating shaft of a friction stirrer (not shown).
  • the connecting portion F1 has a cylindrical shape, and is formed with a screw hole (not shown) in which a bolt is fastened.
  • the stirring pin F2 hangs down from the connecting part F1, and is coaxial with the connecting part F1.
  • the stirring pin F2 is tapered as it is separated from the connecting portion F1.
  • a flat surface F3 that is perpendicular to the rotation center axis C and is flat is formed at the tip of the stirring pin F2.
  • the inclination angle ⁇ formed by the rotation center axis C and the outer peripheral surface of the stirring pin F2 may be set as appropriate within a range of 5 ° to 30 °, for example. Is set to be the same as the inclination angle ⁇ of the step side surface 12b.
  • a spiral groove is engraved on the outer peripheral surface of the stirring pin F2.
  • the spiral groove in order to rotate the rotary tool F to the right, is formed in a 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.
  • the spiral groove when rotating the rotation tool F counterclockwise, it is preferable to form the spiral groove clockwise as it goes from the proximal end to the distal end.
  • the spiral groove in this case is formed clockwise when viewed from above when the spiral groove is traced from the proximal end to the distal end.
  • the second aluminum alloy of the sealing body 203 flows into the gap of the first abutting portion J1 with only the rotating stirring pin F2 inserted into the sealing body 203.
  • the stirring pin F2 is made to make a round along the first butting portion J1.
  • the insertion depth of the stirring pin F2 and the outer surface of the stirring pin F2 are not brought into contact with the step side surface 12b of the peripheral wall stepped portion 12, and the flat surface F3 of the stirring pin F2 is not in contact with the step bottom surface 12a. The position is set.
  • the state in which the outer peripheral surface of the stirring pin F2 is not in contact with the step side surface 12b of the peripheral wall step portion 12 means that the outer peripheral surface of the stirring pin F2 is in contact with the jacket main body 2 during friction stirring. This may include a case where the distance between the outer peripheral surface of the stirring pin F2 and the step side surface 12b is zero.
  • the flat surface F3 of the stirring pin F2 does not contact the step bottom surface 12a of the peripheral wall step portion 12 means that the flat surface F3 of the stirring pin F2 contacts the jacket body 2 when performing frictional stirring. This may include a case where the distance between the flat surface F3 of the stirring pin F2 and the step bottom surface 12a is zero.
  • the separation distance L from the step side surface 12b to the outer peripheral surface of the stirring pin F2 may be set as appropriate depending on the material of the jacket body 2 and the sealing body 203. However, as in the present embodiment, the outer peripheral surface of the stirring pin F2 is set to the step side surface 12b.
  • the flat surface F3 is not brought into contact with the step bottom surface 12a, for example, 0 ⁇ L ⁇ 0.5 mm is set, and preferably 0 ⁇ L ⁇ 0.3 mm.
  • the flat surface F3 of the stirring pin F2 is located above the step bottom surface 12a and is not in contact with the step bottom surface 12a.
  • FIG. 23 is a cross-sectional view of the joint after the first main joining process according to the present embodiment.
  • the plasticized region W1 is formed on the sealing body 203 side with the first butted portion J1 as a boundary.
  • the plasticized region W1 is formed so as to reach the jacket body 2 beyond the second butted portion J2.
  • the second main joining step is a step of friction stir welding the fourth butted portion J4 using the rotary tool F as shown in FIGS.
  • the stirring pin F2 rotated clockwise is inserted into the start position Sp set on the surface 203a of the sealing body 203, and the sealing body 203 and the connecting portion F1 are separated from each other. Move while moving. In other words, frictional stirring is performed with the base end portion of the stirring pin F2 exposed.
  • a plasticized region W2 is formed by hardening the friction-stirred metal.
  • the stirring pin F2 of the rotary tool F and the step side surface 12b of the peripheral wall step portion 12 are not in contact with each other, but the sealing body 203 and the stirring pin F2 are used.
  • the second aluminum alloy mainly on the sealing body 203 side of the first butting portion J1 is agitated and plastically fluidized by the frictional heat between the stepped side surface 12b and the outer peripheral side surface 203c of the sealing body 203 at the first butting portion J1. Can be joined.
  • friction stirring is performed by bringing only the stirring pin F2 into contact with the sealing body 203, the first aluminum alloy is hardly mixed from the jacket body 2 into the sealing body 203. Thereby, in the 1st butt
  • the step side surface 12b of the jacket body 2 is inclined outward, so that contact between the stirring pin F2 and the jacket body 2 can be easily avoided.
  • the stirring pin F2 While avoiding contact with the step side surface 12b, the stirring pin F2 and the step side surface 12b can be brought as close as possible.
  • the stirring pin F2 is brought into contact with only the sealing body 203 to perform friction stir welding. Therefore, the stirring pin is provided on one side and the other side with respect to the rotation center axis C of the stirring pin F2.
  • the material resistance imbalance experienced by F2 can be eliminated. Thereby, since a plastic fluidized material is friction-stirred with sufficient balance, the fall of joining strength can be suppressed.
  • the rotation direction and the traveling direction of the rotary tool F may be set as appropriate, but the jacket body 2 side is the shear side in the plasticizing region W1 formed in the movement locus of the rotary tool F.
  • the rotation direction and the traveling direction of the rotary tool F were set so that the sealing body 203 side was the flow side.
  • the stirring action by the stirring pin F2 around the first butting portion J1 is increased, and a temperature increase at the first butting portion J1 can be expected.
  • the step side surface 12b and the outer peripheral side surface 203c of the sealing body 203 can be more reliably joined.
  • the shear side means the side where the relative speed of the outer periphery of the rotating tool with respect to the joined portion is a value obtained by adding the moving speed to the size of the tangential speed on the outer periphery of the rotating tool.
  • the flow side refers to the side on which the relative speed of the rotating tool with respect to the joined portion is reduced by rotating the rotating tool in the direction opposite to the moving direction of the rotating tool.
  • the plate thickness of the sealing body 203 is made larger than the step side surface 12b, it is possible to prevent metal shortage at the joint (first butting portion J1). Further, the heat conduction efficiency can be increased by increasing the plate thickness of the sealing body 203.
  • the first aluminum alloy of the jacket body 2 is a material having higher hardness than the second aluminum alloy of the sealing body 203. Thereby, durability of the liquid cooling jacket 1 can be improved. Moreover, it is preferable that the first aluminum alloy of the jacket body 2 is an aluminum alloy cast material, and the second aluminum alloy of the sealing body 203 is an aluminum alloy stretched material.
  • the first aluminum alloy as an Al—Si—Cu-based aluminum alloy casting material such as JISH5302 ADC12, for example, the castability, strength, machinability, etc. of the jacket body 2 can be improved.
  • workability and heat conductivity can be improved by making a 2nd aluminum alloy into JIS A1000 type
  • the flat surface F3 of the stirring pin F2 is not inserted deeper than the step bottom surface 12a, but joining is performed by allowing the plasticized region W1 to reach the second butting portion J2. Strength can be increased.
  • the fourth abutting portion J4 friction stir with respect to the fourth abutting portion J4 in a state where the flat surface F3 of the agitating pin F2 is slightly in contact with the end surface of the support column 15 (the front end surface 16a of the protruding portion 16). It is carried out.
  • matching part J4 while being able to prevent mixing of the 1st aluminum alloy from the support
  • the sealing body 203 can be easily positioned with respect to the jacket body 2.
  • first main bonding step or the second main bonding step may be performed first.
  • temporary joining may be performed on the first butted portion J1 by friction stirring or welding. By performing the temporary joining step, it is possible to prevent the opening of the first butted portion J1 during the first main joining step or the second main joining step.
  • the rotary tool FA includes a connecting portion F1 and a stirring pin F2.
  • the agitation pin F2 includes a flat surface F3 that is flat with respect to the rotation center axis C, and a protrusion F4 that protrudes from the flat surface F3.
  • the stirring pin F2 is inserted from the surface 203a of the sealing body 203, and the friction stir welding of the fourth butted portion J4 is performed.
  • the agitation pin F2 is arranged such that the flat surface F3 of the agitation pin F2 is brought into contact with only the sealing body 203 and the tip surface F5 of the projection F4 is brought into contact with the support column 15 (projection 16).
  • Set the insertion depth In other words, the insertion depth of the stirring pin F2 is set so that the side surface of the protrusion F4 is positioned at the fourth butting portion J4.
  • the friction stir along the protrusion F4 causes the protrusion.
  • the plastic fluid material wound up on the portion F4 is pressed by the flat surface F3.
  • the friction around the protrusion F4 (fourth abutting portion J4) can be more reliably agitated and the oxide film of the fourth abutting portion J4 can be reliably divided.
  • the joint strength of the fourth butted portion J4 can be further increased.
  • the peripheral wall (inner wall) 4a of the recess 4 of the sealing body 203 and the step side surface 17b (side surface of the protruding portion 16) of the column step portion 17 are inclined.
  • a tapered inclined surface may be provided.
  • the inclined surface of the concave portion 4 is inclined so that the concave portion 4 is reduced in diameter toward the bottom surface 4b.
  • the protruding portion 16 is inclined so as to be reduced in diameter toward the tip.
  • the manufacturing method of the liquid cooling jacket which concerns on 7th embodiment of this invention performs a preparatory process, a mounting process, a 1st main joining process, and a 2nd main joining process.
  • the preparation process, the placing process, and the second main joining process are the same as those in the sixth embodiment, and thus the description thereof is omitted. Further, in the seventh embodiment, description will be made centering on parts different from the sixth embodiment.
  • the first main joining process is a process of friction stir welding the first butt joint J1 using the rotary tool F as shown in FIG.
  • the main joining step when the stirring pin F2 is relatively moved along the first abutting portion J1, the outer peripheral surface of the stirring pin F2 is slightly brought into contact with the step side surface 12b of the peripheral wall step portion 12, and the flat surface F3 is formed. Friction stir welding is performed so as not to contact the step bottom surface 12a.
  • the contact amount of the outer peripheral surface of the stirring pin F2 with respect to the step side surface 12b is defined as an offset amount N.
  • the offset amount N is set to 0 ⁇ N ⁇ 0. Set between .5 mm, preferably between 0 ⁇ N.ltoreq.0.25 mm.
  • the stirring pin F2 receives on one side and the other side across the rotation center axis C. Material resistance is also very different. For this reason, the plastic fluidized material is not agitated in a well-balanced manner, which has been a factor in reducing the bonding strength.
  • the contact allowance between the outer peripheral surface of the stirring pin F2 and the jacket body 2 is made as small as possible, the material resistance that the stirring pin F2 receives from the jacket body 2 can be made as small as possible.
  • the inclination angle ⁇ of the step side surface 12b of the peripheral wall step portion 12 and the inclination angle ⁇ 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 allowance between the stirring pin F2 and the step side surface 12b can be made uniform over the height direction.
  • the manufacturing method of the liquid cooling jacket which concerns on 8th embodiment of this invention performs a preparatory process, a mounting process, a 1st main joining process, and a 2nd main joining process.
  • the preparation process, the placing process, and the second main joining process are the same as those in the sixth embodiment, and thus the description thereof is omitted. Further, in the eighth embodiment, description will be made centering on parts different from the sixth embodiment.
  • the first main joining step is a step of friction stir welding the jacket body 2 and the sealing body 203 using the rotary tool F as shown in FIG.
  • the main joining step when the stirring pin F2 is relatively moved along the first abutting portion J1, the outer peripheral surface of the stirring pin F2 is not brought into contact with the step side surface 12b, and the flat surface F3 is deeper than the step bottom surface 12a.
  • the friction stir welding is performed in a state where the step is inserted and slightly brought into contact with the step bottom surface 12 a of the peripheral wall step portion 12.
  • the stir pin F2 and the step side surface 12b of the peripheral wall step portion 12 are not in contact with each other, but the first butt is caused by frictional heat between the sealing body 203 and the stir pin F2.
  • the second aluminum alloy mainly on the sealing body 203 side of the part J1 is agitated and plastically fluidized, and the stepped side surface 12b and the outer peripheral side surface 203c of the sealing body 203 can be joined at the first butt portion J1.
  • only the stirring pin F2 is brought into contact with only the sealing body 203 to perform frictional stirring, so that the first aluminum alloy is hardly mixed from the jacket body 2 into the sealing body 203.
  • matching part J1 since the 2nd aluminum alloy by the side of the sealing body 203 is mainly friction-stirred, the fall of joining strength can be suppressed.
  • the stirring pin F2 since the step side surface 12b of the jacket body 2 is inclined outward, the contact between the stirring pin F2 and the step side surface 12b can be easily avoided.
  • the separation distance L is set, for example, to 0 ⁇ L ⁇ 0.5 mm, preferably 0 ⁇ L ⁇ 0.3 mm.
  • the lower part of the joint can be frictionally stirred more reliably. Thereby, it is possible to prevent the occurrence of a cavity defect or the like in the plasticized region W1 and increase the bonding strength.
  • the entire flat surface F3 of the stirring pin F2 is located closer to the center side of the sealing body 203 than the outer peripheral side surface 203c of the sealing body 203. Thereby, since the joining area
  • the manufacturing method of the liquid cooling jacket which concerns on 9th embodiment of this invention performs a preparatory process, a mounting process, a 1st main joining process, and a 2nd main joining process.
  • the preparation step, the placing step, and the second main joining step are the same as those in the sixth embodiment, and a description thereof will be omitted. Further, in the ninth embodiment, description will be made centering on portions that are different from the sixth embodiment.
  • the first main joining step is a step of friction stir welding the first butt joint J1 using the rotary tool F as shown in FIG.
  • the main joining step when the stirring pin F2 is relatively moved along the first abutting portion J1, the outer peripheral surface of the stirring pin F2 is slightly brought into contact with the step side surface 12b of the peripheral wall step portion 12, and the flat surface F3 is formed. Friction stir welding is performed in a state of being inserted deeper than the step bottom surface 12 a and slightly contacting the step bottom surface 12 a of the peripheral wall step portion 12.
  • the contact amount of the outer peripheral surface of the stirring pin F2 with respect to the step side surface 12b is defined as an offset amount N.
  • the offset amount N Is set between 0 ⁇ N ⁇ 1.0 mm, preferably between 0 ⁇ N ⁇ 0.85 mm, and more preferably between 0 ⁇ N ⁇ 0.65 mm.
  • the stirring pin F2 receives on one side and the other side across the rotation center axis C. Material resistance is also very different. For this reason, the plastic fluidized material is not agitated in a well-balanced manner, which has been a factor in reducing the bonding strength.
  • the contact allowance between the outer peripheral surface of the stirring pin F2 and the jacket body 2 is made as small as possible, the material resistance that the stirring pin F2 receives from the jacket body 2 can be reduced.
  • the stirring pin F2 since the inclination angle ⁇ of the step side surface 12b and the inclination angle ⁇ 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 stirring pin F2 The contact allowance with the step side surface 12b can be made uniform over the height direction. Thereby, in this embodiment, since a plastic fluid material is stirred with sufficient balance, the strength reduction of a junction part can be suppressed.
  • the lower part of the joint can be frictionally stirred more reliably. Thereby, it is possible to prevent the occurrence of a cavity defect or the like in the plasticized region W1 and increase the bonding strength. That is, both the first butting portion J1 and the second butting portion J2 can be firmly joined.
  • the manufacturing method of the liquid cooling jacket which concerns on the 3rd modification of 6th embodiment is demonstrated.
  • the third modification is different from the sixth embodiment in that a temporary joining step, a first main joining step, and a second main joining step are performed using a cooling plate.
  • the 3rd modification of 6th Embodiment is the same as the 3rd modification of 1st Embodiment except the plate
  • the first surface is curved so that the surface side of the jacket body 2 and the surface 3a of the sealing body 3 are convex.
  • the sixth embodiment is different from the sixth embodiment in that the main bonding step and the second main bonding step are performed.
  • the 4th modification of 6th Embodiment is the same as the 4th modification of 1st Embodiment except the plate
PCT/JP2018/034605 2018-04-20 2018-09-19 液冷ジャケットの製造方法 WO2019202754A1 (ja)

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