JP2021079421A - Method of manufacturing liquid-cooled jacket - Google Patents

Abstract

To provide a method of manufacturing a liquid-cooled jacket capable of manufacturing a liquid-cooled jacket at low costs.SOLUTION: A method of manufacturing a liquid-cooled jacket includes a first permanent joining step of inserting only agitation pin F2 of a rotary tool F in a surface 3a of a sealing body 3, and friction-stirring a first butting portion J1 by making an outer peripheral edge of the surface 3a of the sealing body 3 relatively round along a peripheral wall portion 11 while only the agitation pin F2 is contacted with the sealing body 3 and an end surface 11a of a peripheral wall portion 11. In the first permanent joining step, while a bottom portion 10 of a jacket body 2 and the surface 3a of the sealing body 3 are pressed and held by a pair of holding portions 22 from both outer sides, and the jacket body 2 and the sealing body 3 are rotated or moved in parallel by using the holding portions 22 to friction-stir the jacket body 2 and the sealing body 3.SELECTED DRAWING: Figure 4

Description

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

For example, Patent Document 1 discloses a method for manufacturing a liquid-cooled jacket in which a jacket body and a sealing body that seals an opening of the jacket body are joined by friction stir welding. In the method for manufacturing the liquid-cooled jacket, a rotating tool is inserted vertically from the side surface of the jacket body and the sealing body, and friction stir welding is performed by rotating the jacket body around the jacket body.

JP-A-2018-69322

In the invention according to Patent Document 1, in order to rotate the rotation tool around the jacket body with the rotation tool and the side surface of the jacket body perpendicular to each other, a rotation tool is provided, for example, a rotation driving means such as a spindle unit at the tip. It is necessary to change / adjust the angle and insertion position of the rotation center axis of the rotation tool by attaching it to the arm robot. For this reason, there is a problem that ancillary equipment such as a device for driving the rotary tool is costly, and as a result, the manufacturing cost is high.

From such a viewpoint, it is an object of the present invention to provide a method for manufacturing a liquid-cooled jacket capable of manufacturing the liquid-cooled jacket at low cost.

In order to solve the above problems, the present invention comprises a jacket body having a bottom, a peripheral wall portion rising from the peripheral edge of the bottom, and a support column rising from the bottom, and a sealing body for sealing the opening of the jacket body. This is a method for manufacturing a liquid-cooled jacket in which the jacket body and the sealing body are joined by frictional stirring, and the outer peripheral surface of the stirring pin of the rotary tool used in frictional stirring is inclined so as to be tapered. By placing the sealing body on the jacket body, the end surface of the peripheral wall portion and the back surface of the sealing body are overlapped to form the first butt portion, and the end face of the support column and the sealing body are formed. A mounting step of superimposing the back surface to form a second butt portion, and inserting only the stirring pin of the rotating tool from the surface of the sealing body and inserting only the stirring pin into the sealing body or the sealing body or First, the first butt portion is rubbed and agitated by making a relative circumference around the peripheral wall portion at a predetermined depth along the first butt portion in a state of being in contact with the peripheral wall portion and the sealing body. Including the main joining step, in the first main joining step, the holding portion is held while pressing the bottom portion of the jacket body and the surface of the sealing body from both outer sides with a pair of holding portions. It is characterized in that the jacket body and the sealing body are rotated or moved in parallel by the use to rub and stir the jacket body and the sealing body.

Further, the present invention includes a jacket body having a bottom portion, a peripheral wall portion rising from the peripheral edge of the bottom portion, and a support column rising from the bottom portion, and a hole into which the tip of the support column is inserted, and seals the opening of the jacket body. This is a method for manufacturing a liquid-cooled jacket which is composed of a sealing body and joins the jacket body and the sealing body by friction stirring, and the outer peripheral surface of a stirring pin of a rotating tool used for friction stirring is tapered. A column step portion having a step bottom surface and a step side surface rising from the step bottom surface is formed at the tip of the column, and the step bottom surface of the column is positioned at the same height as the end surface of the peripheral wall portion. In the preparatory step of forming the sealing body to be larger than the step side surface, and by placing the sealing body on the jacket body, the end surface of the peripheral wall portion and the back surface of the sealing body The first butt portion is formed by superimposing the above columns, and the step side surface of the support column and the hole wall of the hole portion are abutted to form a step side surface butt portion. A mounting step of forming a step bottom surface abutting portion by superimposing the above, and inserting only the stirring pin of the rotating tool from the surface of the sealing body, and inserting only the stirring pin into the sealing body or the sealing body or the said The first one that rubs and stirs the first butt portion by making a relative circumference around the peripheral wall portion at a predetermined depth along the first butt portion in a state of being in contact with the peripheral wall portion and the sealing body. In the first main joining step, the holding portion is used while pressing and holding the bottom portion of the jacket body and the surface of the sealing body from both outer sides with a pair of holding portions. The jacket body and the sealing body are rotated or moved in parallel to rub and stir the jacket body and the sealing body.

According to such a manufacturing method, the jacket body and the sealing body are rotated or translated while the bottom of the jacket body and the surface of the sealing body are held by the pair of holding portions, so that the jacket body and the sealing body are held during the first joining step. The part and the rotation tool do not interfere. That is, the jig for positioning the jacket body and the sealing body does not hinder the movement of the rotating tool. As a result, ancillary equipment such as a device for driving the rotary tool can be simplified, and a liquid-cooled jacket can be manufactured at low cost.

Further, only the stirring pin of the rotating tool is inserted into the second butt portion from the surface of the sealing body, and only the stirring pin is brought into contact with the sealing body or the sealing body and the support column. It is preferable to further include a second joining step in which the second butt portion is moved relative to the second butt portion at a predetermined depth and the second butt portion is frictionally agitated.

Further, only the stirring pin of the rotating tool is inserted into the step side surface abutting portion from the surface of the sealing body, and the step side surface abutting is performed in a state where only the stirring pin is in contact with the sealing body and the support column. It is preferable to further include a second joining step of frictionally agitating the step side surface abutting portion by relatively moving along the portion at a predetermined depth.

According to such a manufacturing method, the bonding strength can be increased.

Further, it is preferable to perform the second main joining step after the first main joining step.

Further, it is preferable to perform the first main joining step after the second main joining step.

Further, in the first main joining step, the stirring pin is rotated at a predetermined rotation speed to perform frictional stirring, and when the stirring pin is pulled out in the first main joining step, the stirring pin is gradually pulled out from the predetermined rotation speed. It is preferable to move the rotation tool relative to the end position while increasing the rotation speed.

Further, in the first main joining step, the stirring pin is rotated at a predetermined rotation speed to perform frictional stirring, and when the stirring pin is inserted in the first main joining step, the rotation speed is higher than the predetermined rotation speed. It is preferable that the stirring pin is inserted in a state of being rotated at a speed, and the stirring pin is relatively moved to the first butt portion while gradually reducing the rotation speed.

According to such a manufacturing method, friction stir welding can be preferably performed.

According to the method for manufacturing a liquid-cooled jacket according to the present invention, the liquid-cooled jacket can be manufactured at low cost.

It is an exploded perspective view of the liquid-cooled 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-cooled 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-cooled 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-cooled 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-cooled jacket which concerns on 1st Embodiment. It is sectional drawing which shows the 2nd joining process of the manufacturing method of the liquid-cooled jacket which concerns on 1st Embodiment. It is sectional drawing which shows the 2nd main joining process of the manufacturing method of the liquid-cooled jacket which concerns on 2nd Embodiment of this invention.

[First Embodiment]
Embodiments of the present invention will be described with reference to the drawings as appropriate. As shown in FIG. 1, the liquid-cooled jacket 1 according to the first embodiment is composed of a jacket body 2 and a sealing body 3. The liquid-cooled jacket 1 is a device that circulates a fluid inside to cool an arranged heating element. The jacket body 2 and the sealing body 3 are integrated by friction stir welding. In the following description, the "front surface" means the surface opposite to the "back surface".

The jacket body 2 is mainly composed of a bottom portion 10 and a peripheral wall portion 11. The jacket body 2 may be any metal (aluminum, aluminum alloy, magnesium, magnesium alloy, copper, copper alloy, titanium, titanium alloy, etc.) that can be agitated by friction, but in this embodiment, it is made of an aluminum alloy.

The bottom portion 10 is a plate-shaped member having a rectangular shape. 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. The corner of the peripheral wall portion 11 may be a right angle, but in the present embodiment, a round chamfering process is performed. A support column 12 stands up at the bottom 10. The number of columns 12 is not particularly limited, but is two in this embodiment. The end surface 12a of the support column 12 has the same height as the end surface 11a of the peripheral wall portion 11. A recess 13 is formed in the bottom portion 10 and the peripheral wall portion 11. Although the jacket body 2 of the present embodiment is integrally formed, for example, the peripheral wall portion 11 may be divided and joined by a seal member to be integrated.

The sealing body 3 is a plate-shaped member that seals the opening of the jacket body 2. The corners of the sealing body 3 may be right angles, but in the present embodiment, round chamfering is performed. The sealing body 3 is not particularly limited as long as it is a metal capable of friction stir welding, but in the present embodiment, it is formed mainly containing an aluminum alloy.

Next, a method for manufacturing the liquid-cooled jacket according to the present embodiment will be described. In the method for manufacturing a liquid-cooled jacket according to the present embodiment, a preparation step, a mounting step, a first main joining step, and a second main joining step are performed.

The preparation step is a step of preparing the jacket body 2 and the sealing body 3. The jacket body 2 and the sealing body 3 are not particularly limited in terms of manufacturing method, but the jacket body 2 is molded by die casting, for example. The sealing body 3 is formed by, for example, extrusion molding.

As shown in FIG. 2, the mounting step is a step of mounting the sealing body 3 on the jacket body 2. By the mounting step, the end surface 11a of the peripheral wall portion 11 and the back surface 3b of the sealing body 3 are abutted to form the first abutting portion J1. The first butt portion J1 is formed in a rectangular shape in a plan view along the periphery of the sealing body 3. Further, the end surface 12a of the support column 12 and the back surface 3b of the sealing body 3 are abutted to form the second abutting portion J2. The side surface 11c of the peripheral wall portion 11 and the side surface 3c of the sealing body 3 are flush with each other. The jacket body 2 and the sealing body 3 may be temporarily joined by welding, friction stir welding, or the like.

As shown in FIGS. 3 and 4, the first main joining step is a step of friction stir welding the first butt portion J1 using the rotary tool F. In the first main joining step, a holding step and a friction stir welding step are performed. In the holding step, the jacket body 2 and the sealing body 3 are pressed from both outer sides by a holding device (jig) provided with a pair of holding portions 22 to hold the jacket body 2. In the present embodiment, an intermediate plate 21 is interposed between the holding portion 22 and the bottom portion 10 and between the holding portion 22 and the sealing body 3, respectively. The holding portion 22 has a columnar shape, and its end faces come into surface contact with the intermediate plates 21 and 21, respectively. By providing the intermediate plate 21, the pressing force of the holding portion 22 can be dispersed, and the jacket body 2 and the sealing body 3 can be reliably held. The intermediate plate 21 may be omitted.

The holding portion 22 of the holding device, the jacket body 2 and the sealing body 3 rotate or move in parallel in synchronization with each other. That is, the sandwiching device rotates the jacket body 2 and the sealing body 3 in the circumferential direction while the bottom portion 10 of the jacket body 2 and the surface 3a of the sealing body 3 are pressed and sandwiched by the holding portions 22 and 22, respectively. At the same time, it can be linearly moved up and down, left and right, and front and back.

As shown in FIG. 4, the rotation tool F includes a connecting portion F1 and a stirring pin F2. The rotary tool F is made of, for example, tool steel. The connecting portion F1 is a portion connected to the rotating shaft of the friction stir device (not shown). The connecting portion F1 has a columnar shape, and a screw hole (not shown) for fastening a bolt is formed.

The stirring pin F2 hangs down from the connecting portion F1 and is coaxial with the connecting portion F1. The stirring pin F2 is tapered as it is separated from the connecting portion F1. A flat flat surface perpendicular to the rotation center axis C and flat is formed at the tip of the stirring pin F2.

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 clockwise, the spiral groove is formed counterclockwise from the base end to the tip end. In other words, the spiral groove is formed counterclockwise when viewed from above when the spiral groove is traced from the base end to the tip end.

When the rotation tool F is rotated counterclockwise, it is preferable to form the spiral groove clockwise from the base end to the tip end. In other words, the spiral groove in this case is formed clockwise when viewed from above when the spiral groove is traced from the base end to the tip end. By setting the spiral groove in this way, the metal plastically fluidized during friction stir welding is guided to the tip end side of the stirring pin F2 by the spiral groove. As a result, the amount of metal that overflows to the outside of the metal member to be joined (jacket body 2 and sealing body 3) can be reduced.

In this embodiment, the rotation tool F is attached to a friction stir device that can move in the horizontal direction and the vertical direction. The rotation tool F may be attached to a robot arm having a rotation driving means such as a spindle unit at its tip.

In the first main joining step, first, the rotary tool F attached to the friction stir welder is rotated clockwise. In this embodiment, the position of the rotation tool F is fixed so as not to move relative to the friction stir device. That is, the rotating tool F is not displaced with respect to the friction stir welding device, but the jacket body 2 and the sealing body 3 side are moved with respect to the rotating tool F to perform friction stir welding.

Next, as shown in FIGS. 3 and 4, a holding step of holding the jacket body 2 and the sealing body 3 is performed, and the jacket body 2 and the sealing body 3 are held by using a holding device (jig). Then, the holding device is operated to insert the rotary tool F into the start position SP1 set on the surface 3a of the sealing body 3 to perform the friction stir welding step. In the friction stir welding step, the press-in section, the main section, and the detachment section are continuously subjected to friction stir welding.

The closet section is a section from the start position SP1 set on the surface 3a of the sealing body 3 to the intermediate point S1 also set on the surface 3a of the sealing body 3. This section is set on the surface 3a of the sealing body 3 after moving around the peripheral wall portion 11 from the intermediate point S1 and moving along the outer edge portion of the surface 3a of the sealing body 3 and passing through the intermediate point S1. It is a section up to the intermediate point S2. The detachment section is a section from the intermediate point S2 to the end position EP1 set on the surface 3a of the sealing body 3. The intermediate points S1 and S2 are set at positions corresponding to the first butt portion J1 on the surface 3a of the sealing body 3 so as to be separated from each other. Further, the start position SP1 and the end position EP1 are set inside the surface 3a of the sealing body 3 from the positions corresponding to the first butt portion J1.

In the closet section, the rotation center axis C of the rotation tool F is arranged so as to be perpendicular to the start position SP1, and the stirring pin F2 is gradually pushed in until it reaches a predetermined depth while moving relative to the intermediate point S1. I will go. When the rotation tool F reaches the intermediate point S1, the section shifts to this section as it is. A plasticized region W1 is formed in the movement locus of the rotation tool F. When shifting the rotation tool F from the closet section to this section, move the rotation tool F in a straight line or arc shape in a plan view so that the rotation tool F does not stop or the movement speed decreases in the middle. Is preferable.

In this section, the rotation tool F is moved while maintaining a predetermined depth while keeping the rotation center axis C of the rotation tool F, the surface 3a of the sealing body 3 and the end surface 11a of the peripheral wall portion 11 perpendicular to each other. The outer edge portion of the sealing body 3 is moved relative to the outer edge portion of the surface 3a so as to go around the outer edge portion. Here, the "predetermined depth" refers to the depth at which the stirring pin F2 of the rotating tool F is inserted from the intermediate point S1 to the intermediate point S2 in this section. In the present embodiment, the flat surface F3 of the stirring pin F2 of the rotating tool F is set to reach the end surface 11a of the peripheral wall portion 11. At the corners of the jacket body 2 and the sealing body 3, the rotating tool F is relatively moved while rotating the holding portions 22 and 22. In this section, only the stirring pin F2 is brought into contact with the peripheral wall portion 11 and the sealing body 3, and friction stirring is performed with the base end side of the stirring pin F2 exposed. When the rotation tool F reaches the intermediate point S2 by overlapping the start end and the end end of the plasticization region W1, the process shifts to the detachment section as it is. When shifting the rotation tool F from this section to the departure section, the rotation tool F is moved in a linear or arcuate shape in a plan view so that the rotation tool F does not stop or the movement speed decreases in the middle. Is preferable.

In the detachment section, as shown in FIG. 5, the stirring pin F2 is gradually pulled out while moving relative to the end position EP1 from the intermediate point S2, and is detached at the end position EP1. When the first main joining step is completed, the holding device is detached from the jacket body 2 and the sealing body 3.

In the present embodiment, in this section, the flat surface F3 at the tip of the stirring pin F2 is set to reach the end surface 11a, but friction stir welding is performed with the stirring pin F2 in contact with only the sealing body 3. May be good. In this case, the first butt portion J1 is plastically fluidized and joined by the frictional heat between the stirring pin F2 and the sealing body 3.

As shown in FIG. 6, the second main joining step is a step of friction stir welding the sealing body 3 and the support column 12 using the rotary tool F. In the second main joining step, the rotating tool F is inserted vertically from the surface 3a of the sealing body 3, is relatively moved along the second butt portion J2 by one or more turns, and then the rotating tool F is separated from the sealing body 3. Let me. In the second main joining step, only the stirring pin F2 is brought into contact with the support column 12 and the sealing body 3 of the jacket body 2, and friction stirring is performed with the base end side of the stirring pin F2 exposed.

In the present embodiment, the flat surface F3 at the tip of the stirring pin F2 reaches the end surface 12a, but friction stir welding may be performed in a state where the stirring pin F2 and the sealing body 3 are in contact with each other. In this case, the second butt portion J2 is plastically fluidized and joined by the frictional heat between the stirring pin F2 and the sealing body 3. The second joining step may be omitted.

According to the method for manufacturing a liquid-cooled jacket according to the first embodiment described above, the jacket main body is held in a state where the bottom portion 10 of the jacket main body 2 and the surface 3a of the sealing body 3 are held from both outer sides by a pair of holding portions 22. Since the 2 and the sealing body 3 are rotated or moved, the holding portion 22 and the rotating tool F do not interfere with each other during the first main joining process. That is, since the jig for positioning the jacket body 2 and the sealing body 3 is not on the movement route of the rotation tool F, the movement of the rotation tool F is not hindered. As a result, the cost is not required for ancillary equipment such as a device for driving the rotary tool F, and as a result, the manufacturing cost of the liquid-cooled jacket 1 can be reduced.

Further, the joining strength can be increased by performing the second joining step. If the stirring pin F2 is brought into contact with the support column 12 in the second main joining step, the second butt portion J2 can be joined more reliably. Further, by inserting only the rotating tool F into the jacket body 2 and the sealing body 3, the load acting on the friction stir welding device can be reduced.

Here, the start position SP1 may be set on the first butt portion J1 and the rotation tool F may be inserted vertically to perform friction stir welding, but in this form, excessive frictional heat is generated at the start position SP1. It may occur and cause poor joining. On the other hand, as in the present embodiment, the start position SP1 is set inside the first butt portion J1, and the stirring pin F2 is gradually pushed toward the first butt portion J1 while being relatively moved. It is possible to prevent the frictional heat from becoming excessive on the one butt portion J1.

Similarly, the end position EP1 may be set on the first butt portion J1 and the rotation tool F may be vertically detached at the end position EP1, but in this form, excessive frictional heat is generated at the end position EP1. However, there is a risk of poor joining. On the other hand, as in the present embodiment, the end position EP1 is set inside the first butt portion J1, and the stirring pin F2 is gradually pulled out from the first butt portion J1 while moving relative to the first butt portion J1. It is possible to prevent the frictional heat from becoming excessive on J1.

Further, in the first main joining step, since the start end and the end end of the plasticized region W1 on the surface 3a of the sealing body 3 are overlapped, the airtightness and watertightness can be improved.

The first main joining step may be performed after the second main joining step. Further, in the first joining step of the present embodiment, the position of the rotating tool F is set so as not to be displaced with respect to the friction stir welding device, but the rotating tool F, the jacket body 2 and the sealing body 3 (holding device) are used. May be moved to perform friction stir welding. For example, when the rotary tool F is attached to the robot arm, the robot arm, the jacket body 2 and the sealing body 3 (holding device) may both be moved to perform friction stir welding.

Further, in this joining step, the rotation speed of the rotation tool F may be constant or variable. In the indentation section of the main joining step, if the rotation speed of the rotation tool F at the start position SP1 is V1 and the rotation speed of the rotation tool F in this section is V2, V1> V2 may be satisfied. The rotation speed V2 is a preset constant rotation speed in the set movement route L1. That is, at the start position SP1, the rotation speed may be set high, and the rotation speed may be gradually reduced in the closet section to shift to the main section.

Further, in the detachment section of the first main joining step, if the rotation speed of the rotation tool F in this section is V2 and the rotation speed of the rotation tool F when detached at the end position EP1 is V3, V3> V2 may be satisfied. That is, after shifting to the detachment section, the rotation tool F may be detached from the sealing body 3 while gradually increasing the rotation speed toward the end position EP1. When the rotary tool F is pushed into the sealing body 3 or separated from the sealing body 3, by setting as described above, it is possible to supplement the small pressing force in the pushing-in section or the separating section with the rotation speed. Therefore, friction stir welding can be preferably performed.

[Second Embodiment]
Next, a method for manufacturing the liquid-cooled jacket according to the second embodiment of the present invention will be described. As shown in FIG. 7, the second embodiment is mainly different from the first embodiment in that the support column 12 is provided with the support column step portion 14. In the second embodiment, the parts different from the first embodiment will be mainly described.

The jacket body 2A is composed of a bottom portion 10, a peripheral wall portion 11, and a support column 12. The bottom portion 10 and the peripheral wall portion 11 are the same as those in the first embodiment. A protrusion 15 is formed on the tip end side of the support column 12. The shape of the protruding portion 15 is not particularly limited, but in the present embodiment, it has a columnar shape. By forming the projecting portion 15, a strut step portion 14 is formed at the tip of the strut 12. The strut step portion 14 is formed with a step bottom surface 14a and a step side surface 14b rising from the step bottom surface 14a. The step bottom surface 14a is formed at the same height as the end surface 11a of the peripheral wall portion 11.

A hole 4 is formed in the sealing body 3A. The hole 4 is formed at a position corresponding to the protrusion 15 of the support column 12. The hole 4 is formed in a size such that the protrusion 15 can be inserted.

In the method for manufacturing a liquid-cooled jacket according to the second embodiment, a preparation step, a mounting step, a first main joining step, and a second main joining step are performed. The preparation step is a step of preparing the jacket body 2A and the sealing body 3A.

As shown in FIG. 7, the mounting step is a step of mounting the sealing body 3A on the jacket body 2A. In the mounting step, the protruding portion 15 of the support column 12 is inserted into the hole portion 4 while the sealing body 3A is mounted on the end surface 11a of the peripheral wall portion 11. As a result, the end surface 11a of the peripheral wall portion 11 and the back surface 3b of the sealing body 3 are abutted to form the first abutting portion J1. Further, the step side surface 14b and the hole wall 4a of the hole portion 4 are abutted to form the step side surface abutting portion J12. Further, the step bottom surface 14a and the back surface 3b of the sealing body 3 are abutted to form the step bottom surface abutting portion J13. The thickness of the sealing body 3 may be appropriately set, but in the present embodiment, it is larger than the height dimension of the step side surface 14b.

The first main joining step is the same as that of the first embodiment. In the second main joining step, only the stirring pin F2 of the rotation tool F is inserted into the step side surface butt portion J12 and the step bottom surface butt portion J13, and the rotation tool F is relatively moved one or more turns along the step side surface butt portion J12. In the present embodiment, the insertion depth is set so that the flat surface F3 at the tip of the stirring pin F2 reaches the step bottom surface 14a. In the second main joining step, a plasticized region W2 is formed in the movement locus of the rotation tool F. In the second joining step, the flat surface F3 at the tip of the rotary tool F may be set so as not to come into contact with the step bottom surface 14a.

According to the second joining step according to the present embodiment described above, the jacket body 2A and the sealing body 3A can be positioned by inserting the hole 4 of the sealing body 3A into the protruding portion 15 of the support column 12. It can be done easily. Further, since the plate thickness of the sealing body 3A is set to be larger than that of the step side surface 14b, it is possible to prevent the joint portion from becoming short of metal.
Although the embodiments of the present invention have been described above, the design can be appropriately changed within a range not contrary to the gist of the present invention.

1 Liquid-cooled jacket 2 Jacket body 3 Encapsulant 10 Bottom 11 Peripheral wall 11a End face 22 Holding F Rotating tool F2 Stirring pin J1 First butt J2 Second butt J12 Step side butt J13 Step bottom butt SP1 Start position EP1 end position W1 plasticization region

Claims (8)

The jacket body is composed of a bottom portion, a peripheral wall portion rising from the peripheral edge of the bottom portion, a jacket main body having a support column rising from the bottom portion, and a sealing body for sealing the opening of the jacket main body. A method for manufacturing a liquid-cooled jacket that is joined by friction stir welding.
The outer peripheral surface of the stirring pin of the rotary tool used for friction stir is inclined so as to be tapered.
By placing the sealing body on the jacket body, the end surface of the peripheral wall portion and the back surface of the sealing body are overlapped to form the first butt portion, and the end face of the support column and the sealing body are formed. A mounting process in which the back surface is overlapped to form a second butt portion,
Only the stirring pin of the rotating tool is inserted from the surface of the sealing body, and the first abutting is performed in a state where only the stirring pin is in contact with the sealing body, the peripheral wall portion and the sealing body. Including a first main joining step of frictionally agitating the first butt portion by making a relative circumference around the peripheral wall portion at a predetermined depth along the portion.
In the first main joining step, the bottom of the jacket body and the surface of the sealing body are pressed and held by a pair of holding portions from both outer sides, and the jacket body and the sealing are used by using the holding portions. A method for producing a liquid-cooled jacket, which comprises rotating or translating a stop body to frictionally stir the jacket body and the sealing body. A state in which only the stirring pin of the rotating tool is inserted into the second butt portion from the surface of the sealing body, and only the stirring pin is in contact with the sealing body or the sealing body and the support column. The first aspect of claim 1, further comprising a second joining step of frictionally agitating the second butt portion by moving the second butt portion relative to the second butt portion at a predetermined depth. How to manufacture a liquid-cooled jacket. A jacket body having a bottom portion, a peripheral wall portion rising from the peripheral edge of the bottom portion, and a support column rising from the bottom portion, and a sealing body provided with a hole into which the tip of the support column is inserted and sealing an opening of the jacket body. It is a method for manufacturing a liquid-cooled jacket, which is configured and joins the jacket body and the sealing body by friction stir welding.
The outer peripheral surface of the stirring pin of the rotary tool used for friction stir is inclined so as to be tapered.
A strut step portion having a step bottom surface and a step side surface rising from the step bottom surface is formed at the tip of the strut, and the step bottom surface of the strut is formed at the same height position as the end surface of the peripheral wall portion, and the sealing is performed. The preparatory step of forming the body thickness larger than the step side surface, and
By placing the sealing body on the jacket body, the end surface of the peripheral wall portion and the back surface of the sealing body are overlapped to form the first abutting portion, and the stepped side surface of the support column and the hole portion are formed. A mounting step of forming a step side surface abutting portion by abutting the hole wall and superimposing the step bottom surface of the support column and the back surface of the sealing body to form a step bottom surface abutting portion.
Only the stirring pin of the rotating tool is inserted from the surface of the sealing body, and the first abutting is performed in a state where only the stirring pin is in contact with the sealing body, the peripheral wall portion and the sealing body. Including a first main joining step of frictionally agitating the first butt portion by making a relative circumference around the peripheral wall portion at a predetermined depth along the portion.
In the first main joining step, the bottom of the jacket body and the surface of the sealing body are pressed and held by a pair of holding portions from both outer sides, and the jacket body and the sealing are used by using the holding portions. A method for producing a liquid-cooled jacket, which comprises rotating or translating a stop body to frictionally stir the jacket body and the sealing body. Only the stirring pin of the rotating tool is inserted into the step side surface abutting portion from the surface of the sealing body, and only the stirring pin is brought into contact with the sealing body and the supporting column into the step side surface abutting portion. The method for manufacturing a liquid-cooled jacket according to claim 3, further comprising a second joining step of frictionally agitating the step side surface abutting portion by relatively moving the step side surface abutting portion along a predetermined depth. The method for manufacturing a liquid-cooled jacket according to claim 2 or 4, wherein the second main joining step is performed after the first main joining step. The method for manufacturing a liquid-cooled jacket according to claim 2 or 4, wherein the first main joining step is performed after the second main joining step. In the first main joining step, the stirring pin is rotated at a predetermined rotation speed to perform frictional stirring.
Claims 1 to 6 are characterized in that when the stirring pin is pulled out in the first main joining step, the rotation tool is relatively moved to the end position while gradually increasing the rotation speed from the predetermined rotation speed. The method for manufacturing a liquid-cooled jacket according to any one of the above. In the first main joining step, the stirring pin is rotated at a predetermined rotation speed to perform frictional stirring.
When the stirring pin is inserted in the first main joining step, the stirring pin is inserted in a state of being rotated at a speed higher than the predetermined rotation speed, and the rotation speed is gradually reduced to the first butt portion. The method for manufacturing a liquid-cooled jacket according to any one of claims 1 to 7, wherein the liquid-cooled jacket is relatively moved.

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