WO2017119232A1

WO2017119232A1 - Joining method and method of manufacturing liquid-cooled jacket

Info

Publication number: WO2017119232A1
Application number: PCT/JP2016/086583
Authority: WO
Inventors: 堀　久司; 伸城瀬尾
Original assignee: 日本軽金属株式会社
Priority date: 2016-01-06
Filing date: 2016-12-08
Publication date: 2017-07-13
Also published as: CN108025391A

Abstract

A joining method for joining a first metal member (1) and a second metal member (2) using a rotating tool for joining (F) provided with a stirring pin (F2) is characterized by including: an abutting step of causing the first metal member (1) and the second metal member (2) to abut against one another in substantially an L-shape or T-shape as seen in a cross section, to form an abutting portion (J1); a disposing step of disposing an auxiliary member (10) in an inner corner between the first metal member (1) and the second metal member (2), in such a way as to come into surface contact with the first metal member (1) or the second metal member (2); and a friction stirring step of inserting the rotating stirring pin (F2) into the inner corner, and with only the stirring pin (F2) in contact with the first metal member (1), the second metal member (2) and the auxiliary member (10), causing the rotating tool for joining (F) to move in a relative manner along the inner corner to join the first metal member (1), the second metal member (2) and the auxiliary member (10) to one another.

Description

Joining method and liquid cooling jacket manufacturing method

The present invention relates to a joining method for joining metal members by friction stir and a manufacturing method for a liquid cooling jacket.

For example, in Patent Document 1, after joining a first metal member and a second metal member in an L-shaped cross section to form a butted portion, a rotating tool is inserted into the inner corner, and the butted portion is friction stir welded A method is described. In the friction stir welding, friction stirring is performed with only the stirring pin in contact with the first metal member and the second metal member.

Further, for example, Patent Document 2 discloses a joining method in which a first metal member and a second metal member having different sizes are subjected to friction stir welding. In the joining method, a butting step of abutting the first metal member and the second metal member, a step of arranging a triangular prism-shaped auxiliary member at the inner corner of the first metal member and the second metal member, The stirring pin of the rotary tool is inserted from above, and friction stirring is performed on the butt portion in a state where only the stirring pin is in contact with the first metal member, the second metal member, and the auxiliary member.

In addition, as the performance of electronic devices typified by personal computers is improved, the amount of heat generated by a CPU (heating element) mounted on the electronic device increases, and cooling of the CPU is important. Conventionally, air-cooled fan type heat sinks have been used to cool CPUs, but problems such as fan noise and cooling limit in air-cooled systems have come to be highlighted. The jacket is drawing attention.

As a method for manufacturing such a liquid cooling jacket, Patent Document 3 discloses a technique for joining metal components together by friction stir welding. A conventional liquid cooling jacket is composed of a box-shaped jacket body that is open at the top and a plate-shaped sealing body that seals the opening of the jacket body.

In the conventional method for manufacturing a liquid cooling jacket, a plate-shaped sealing body is placed on the stepped portion of the jacket body, and a stirring pin of a rotating tool is inserted from an inner corner formed by the jacket body and the sealing body, The rotating tool is rotated around the sealing body.

JP 2013-49072 A JP 2015-223607 A JP 2016-2558 A

In the joining method of Patent Document 1, since the plastic fluidized metal is not pressed by the shoulder portion, there is a problem that the plastic fluidized metal overflows to the outside and the joint becomes insufficient.

In addition, in the joining method of Patent Document 2, an auxiliary member is disposed in the inner corner, and friction agitation is performed on the butt portion in a state where the agitation pin is in contact with the first metal member, the second metal member, and the auxiliary member. Since it does, it can prevent that a junction part (inner corner) becomes metal shortage. However, since many burrs are generated in the inner corner after the friction stirring step, there is a problem that the operation of removing the burrs becomes complicated.

Further, in the method for manufacturing a liquid cooling jacket disclosed in Patent Document 3, since frictional stirring is performed with only the stirring pin inserted in the inner corner, the plastic fluid material may overflow to the outside and the joint may become insufficient in metal. . Further, since the metal is not pressed by the shoulder portion of the rotary tool, a lot of burrs are generated, and there is a problem that the process of removing the burrs becomes complicated.

Therefore, an object of the present invention is to provide a joining method that can prevent metal shortage at the joint. It is another object of the present invention to provide a joining method that can prevent the burrs from being easily removed while preventing the joining portion from becoming insufficient in metal. Furthermore, this invention makes it a subject to provide the manufacturing method of the liquid cooling jacket which can remove a burr | flash easily while preventing the metal shortage of a junction part.

In order to solve the above problems, the present invention provides a joining method for joining a first metal member and a second metal member using a rotary tool having a stirring pin, the first metal member and the second metal member. A butting step of butting a metal member in a substantially L-shaped or substantially T-shaped cross section to form a butting portion; and in the inner corner of the first metal member and the second metal member, the first metal member or the An arrangement step of arranging an auxiliary member so as to be in surface contact with the second metal member, and the rotating stirring pin is inserted into the inner corner, and only the stirring pin is inserted into the first metal member, the second metal member, and the A friction stir process for joining the first metal member, the second metal member, and the auxiliary member by relatively moving the rotary tool along the inner corner in a state of being in contact with the auxiliary member. And
In addition, the present invention is a joining method for joining a first metal member and a second metal member using a rotary tool provided with a stirring pin, wherein the first metal member and the second metal member are substantially cut in cross section. A butting step of butting in an L shape or a substantially T shape to form a butting portion, and an inner corner of the first metal member and the second metal member, the first metal member and the second metal member facing each other An arrangement step of arranging an auxiliary member having a substantially L-shaped cross section so as to come into contact with the rotating stirring pin is inserted into an inner corner of the auxiliary member, and only the stirring pin is used for the first metal member and the second metal. A friction stir process for joining the first metal member, the second metal member, and the auxiliary member by relatively moving the rotary tool along the inner corner in a state of being in contact with the member and the auxiliary member. It is characterized by that.

According to this joining method, the first metal member and the second metal member are joined, and in addition to the first metal member and the second metal member, the auxiliary member is also simultaneously friction stir welded, whereby Shortage can be prevented.

Further, it is preferable to include a removing step of removing the auxiliary member on which the burr is formed from the first metal member or the second metal member. In addition, it is preferable to include a removing step of removing the auxiliary member, which is divided by the friction stirring step and has a burr formed thereon, from the first metal member and the second metal member.

According to such a joining method, since the auxiliary member on which the burr is formed can be removed, the burr can be easily removed.

In the friction stir step, it is preferable to set the joining conditions so that burrs generated in the friction stir welding are formed on the auxiliary member.

According to such a joining method, since the burrs can be concentrated on the auxiliary member, the work of removing the burrs can be performed more easily.

Further, in order to solve the above-mentioned problem, the present invention is a joining method for joining two metal members having different shapes of surfaces to be abutted using a rotary tool provided with a stirring pin, A butting step of butting the metal member and the other metal member to form a butting portion; and an arrangement step of placing an auxiliary member at the inner corner of the metal members over the circumferential direction of the other metal member; The rotated stirring pin is inserted into the inner corner, and only the stirring pin is in contact with the metal members and the auxiliary member, and the friction stir of the butted portion is performed over the circumferential direction of the other metal member. And a removing step of removing the auxiliary member from at least one of the one metal member and the other metal member.

According to such a joining method, in addition to the metal members, the auxiliary member is also friction stir welded at the same time, so that a metal shortage at the joint can be prevented. Further, since the burrs can be removed together with the auxiliary member by the removing step, the burrs can be easily removed.

In the friction stirring step, it is preferable to set the joining conditions so that burrs generated by friction stirring are formed on the auxiliary member. According to such a joining method, since the burrs are collected on the auxiliary member, the burrs can be removed more easily.

Moreover, all the said metal members are plate-shaped, and it is preferable to abut | match the surface of one said metal member, and the back surface of the other said metal member in the said butt | matching process.
Further, one of the metal members has a plate shape, and the other metal member has a columnar shape, and in the butting step, the surface of one of the metal members and the end surface of the other metal member are butted. Is preferred.
In addition, one of the metal members has a plate shape, and the other metal member has a cylindrical shape. In the butting step, the surface of one of the metal members and the end surface of the other metal member are butted. Is preferred.
In addition, one of the metal members has a plate shape, and the other metal member has a cylindrical shape. In the butting step, the surface of one of the metal members and the end surface of the other metal member are butted. Is preferred.
Further, it is preferable that a through hole is formed in one of the metal members, and the through hole is covered with the other metal member in the butting step.
Further, it is preferable that a through hole is formed in one of the metal members, and the through hole and the hollow portion of the other metal member are communicated with each other in the butting step.

According to such a joining method, metal members having various shapes can be joined together.

In order to solve the above-mentioned problem, the present invention is a method for manufacturing a liquid cooling jacket comprising a jacket body having a recess through which a heat transport fluid flows and a sealing body that seals the opening of the recess. A step bottom surface having a bottom portion and a frame-shaped peripheral wall portion rising from a peripheral edge of the bottom portion, the step bottom surface formed at a position one step lower than an end surface of the peripheral wall portion, and the step bottom surface A step of preparing the jacket body including a step side surface rising from the step side, placing the sealing body having a thickness larger than the height dimension of the step side surface on the step bottom surface, A butting step of forming a butting portion in which the side surface of the sealing body is butted, a disposing step of disposing an auxiliary member at an inner corner formed by an end surface of the peripheral wall portion and a side surface of the sealing body, Time with a stirring pin in the inner corner A friction stirring step of inserting a tool and stirring the butt portion in a state where only the stirring pin is in contact with the jacket body, the sealing body and the auxiliary member, and the auxiliary member on which a burr is formed. Removing from at least one of the jacket body and the sealing body, and in the friction stirring step, the rotating tool is caused to make a round around the sealing body along the inner corner, and the butt portion It is characterized by joining.

According to such a manufacturing method, an auxiliary member is disposed in the inner corner, and the auxiliary member in addition to the jacket main body and the sealing body is frictionally stirred at the same time, thereby preventing metal shortage at the joint. Further, since the burr can be removed together with the auxiliary member by the removing step, the burr can be easily removed.

Further, in the friction stirring step, it is preferable to set a joining condition so that the burr is generated in the auxiliary member. According to this manufacturing method, burrs can be removed more easily.

Further, in the friction stirring step, it is preferable to perform the friction stirring in a state where the rotation center axis of the rotary tool is inclined outward. According to this manufacturing method, the rotary tool can be easily inserted into the inner corner.

Further, in the preparation step, a support portion provided with an end surface flush with the step bottom surface and a protruding portion protruding from the support portion are formed on the bottom portion, and a concave groove is formed on the back surface of the sealing body, In the butting step, the sealing body is placed while inserting the protruding portion into the concave groove, and in the friction stirring step, the fitting portion in which the protruding portion and the concave groove are fitted to each other. Friction stirring is preferably performed in a state where only the stirring pin of the rotary tool is in contact with only the sealing body or with the protruding portion and the sealing body.

According to this manufacturing method, since the sealing body is supported by the support portion and the support portion and the sealing body are also friction stir welded, the strength of the liquid cooling jacket can be increased. Moreover, the positioning work of the sealing body can be easily performed by inserting the protruding portion into the concave groove.

Further, the support portion extends from the peripheral wall portion, and in the friction stirring step, after the friction stir of the fitting portion, the support portion is moved as it is to the peripheral wall portion, and the It is preferable to release the rotating tool.

According to this manufacturing method, since the hole for the stirring pin is formed at a position away from the concave portion of the jacket body, the water-tightness and air-tightness of the liquid-cooled jacket can be improved.

In order to solve the above-mentioned problem, the present invention is a method for manufacturing a liquid cooling jacket comprising a jacket body having a recess through which a heat transport fluid flows and a sealing body that seals the opening of the recess. The preparation step of preparing the jacket body having the bottom and the frame-shaped peripheral wall portion rising from the peripheral edge of the bottom portion, and the sealing body, and the end surface of the peripheral wall portion and the back surface of the sealing body are overlapped A superposition step of forming a superposition part, an arrangement step of arranging an auxiliary member in an inner corner constituted by an end face of the peripheral wall portion and a side surface of the sealing body, and a rotary tool provided with a stirring pin in the inner corner A friction stirring step of inserting and stirring the overlapping portion with only the stirring pin in contact with the jacket body, the sealing body and the auxiliary member; and the auxiliary member having a burr formed therein. Body and said seal Removing from at least one of the bodies, and in the friction stir step, the rotation tool is made to make a round around the sealing body along the inner corner, and the overlapping portion is joined. To do.

According to such a manufacturing method, an auxiliary member is disposed in the inner corner, and the auxiliary member in addition to the jacket main body and the sealing body is frictionally stirred at the same time, thereby preventing metal shortage at the joint. Further, since the burrs can be removed together with the auxiliary member by the removing step, the burrs can be easily removed.

Further, in the preparation step, a support portion provided with an end surface flush with the end surface of the peripheral wall portion is erected on the bottom portion, and a protruding portion is formed on the end surface of the support portion. In the polymerization step, the sealing body is placed so as to cover the end surface of the peripheral wall portion and the end surface of the support portion while inserting the protruding portion into the concave groove. In the agitation step, the rotating tool is rubbed against the fitting portion in which the concave groove and the protruding portion are fitted to each other, or in a state where the rotating tool is in contact with only the sealing body or the sealing body and the protruding portion. It is preferable to stir.

In the friction stirring step, it is preferable that the rotating tool is moved away from the sealing body after the stirring pin of the rotating tool is relatively moved along the projecting portion for one or more rounds.

According to such a manufacturing method, the bonding strength can be increased, and the water tightness and the air tightness can be improved.

According to the joining method according to the present invention, metal shortage at the joint can be prevented. Further, according to the joining method according to the present invention, it is possible to prevent the burrs from being easily removed while preventing the joining portion from becoming a metal shortage. Moreover, according to the manufacturing method of the liquid cooling jacket which concerns on this invention, the metal shortage of a junction part can be prevented and a burr | flash can be removed easily.

It is sectional drawing which shows the matching process and arrangement | positioning process of 1st embodiment of this invention. It is sectional drawing which shows the friction stirring process which concerns on 1st embodiment. It is sectional drawing which shows the removal process which concerns on 1st embodiment. It is sectional drawing which shows the removal process after 1st embodiment. It is sectional drawing which shows the modification of the friction stirring process which concerns on 1st embodiment. It is sectional drawing which shows the matching process and arrangement | positioning process which concern on 2nd embodiment. It is sectional drawing which shows the friction stirring process which concerns on 2nd embodiment. It is sectional drawing which shows the removal process which concerns on 2nd embodiment. It is sectional drawing which shows the friction stirring process which concerns on 3rd embodiment. It is sectional drawing which shows the friction stirring process which concerns on 4th embodiment. It is a perspective view which shows the preparation process and butt | matching process of the joining method which concern on 5th embodiment of this invention. It is a perspective view which shows the arrangement | positioning process of the joining method which concerns on 5th embodiment. It is a perspective view which shows the friction stirring process of the joining method which concerns on 5th embodiment. It is sectional drawing which shows the friction stirring process of the joining method which concerns on 5th embodiment. It is a perspective view which shows the completion | finish position of the friction stirring process of the joining method which concerns on 5th embodiment. It is a perspective view which shows the removal process of the joining method which concerns on 5th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 5th embodiment. It is a perspective view which shows the preparation process and butt | matching process of the joining method which concern on 6th embodiment of this invention. It is a perspective view which shows the arrangement | positioning process of the joining method which concerns on 6th embodiment. It is a perspective view which shows the friction stirring process of the joining method which concerns on 6th embodiment. It is sectional drawing which shows the friction stirring process of the joining method which concerns on 6th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 6th embodiment. It is a perspective view which shows the preparation process and butt | matching process of the joining method which concern on 7th embodiment. It is a perspective view which shows the arrangement | positioning process of the joining method which concerns on 7th embodiment. It is a perspective view which shows the arrangement | positioning process of the joining method which concerns on 8th embodiment. It is sectional drawing which shows the arrangement | positioning process of the joining method which concerns on 8th embodiment. It is a disassembled perspective view of the liquid cooling jacket which concerns on 9th embodiment of this invention. It is a perspective view which shows the butt | matching process of the manufacturing method of the liquid cooling jacket which concerns on 9th embodiment. It is sectional drawing which shows the butt | matching process of the manufacturing method of the liquid cooling jacket which concerns on 9th embodiment. It is a perspective view which shows the auxiliary member of the manufacturing method of the liquid cooling jacket which concerns on 9th embodiment. It is a perspective view which shows the arrangement | positioning process of the manufacturing method of the liquid cooling jacket which concerns on 9th embodiment. It is a perspective view which shows the 1st friction stirring process of the manufacturing method of the liquid cooling jacket which concerns on 9th embodiment. It is sectional drawing which shows the 1st friction stirring process of the manufacturing method of the liquid cooling jacket which concerns on 9th embodiment. It is a perspective view which shows the 2nd friction stirring process of the manufacturing method of the liquid cooling jacket which concerns on 9th embodiment. It is sectional drawing which shows the 2nd friction stirring process of the manufacturing method of the liquid cooling jacket which concerns on 9th embodiment. It is a perspective view which shows the removal process of the manufacturing method of the liquid cooling jacket which concerns on 9th embodiment. It is sectional drawing which shows the removal process of the manufacturing method of the liquid cooling jacket which concerns on 9th embodiment. It is a perspective view which shows the auxiliary member of the manufacturing method of the liquid cooling jacket which concerns on 10th embodiment. It is a perspective view which shows the arrangement | positioning process of the manufacturing method of the liquid cooling jacket which concerns on 10th embodiment. It is a perspective view which shows the 1st friction stirring process and the 2nd friction stirring process of the manufacturing method of the liquid cooling jacket which concerns on 10th embodiment. It is sectional drawing which shows the 2nd friction stirring process of the manufacturing method of the liquid cooling jacket which concerns on 10th embodiment. It is sectional drawing which shows the removal process of the manufacturing method of the liquid cooling jacket which concerns on 10th embodiment. It is a disassembled perspective view of the liquid cooling jacket which concerns on 11th embodiment of this invention. It is a perspective view which shows the superposition | polymerization process of the manufacturing method of the liquid cooling jacket which concerns on 11th embodiment. It is sectional drawing which shows the superposition | polymerization process of the manufacturing method of the liquid cooling jacket which concerns on 11th embodiment. It is a perspective view which shows the auxiliary member of the manufacturing method of the liquid cooling jacket which concerns on 11th embodiment. It is a perspective view which shows the arrangement | positioning process of the manufacturing method of the liquid cooling jacket which concerns on 11th embodiment. It is a perspective view which shows the 1st friction stirring process of the manufacturing method of the liquid cooling jacket which concerns on 11th embodiment. It is sectional drawing which shows the 1st friction stirring process of the manufacturing method of the liquid cooling jacket which concerns on 11th embodiment. It is a perspective view which shows the 2nd friction stirring process of the manufacturing method of the liquid cooling jacket which concerns on 11th embodiment. It is sectional drawing which shows the 2nd friction stirring process of the manufacturing method of the liquid cooling jacket which concerns on 11th embodiment. It is a perspective view which shows the removal process of the manufacturing method of the liquid cooling jacket which concerns on 11th embodiment. It is sectional drawing which shows the removal process of the manufacturing method of the liquid cooling jacket which concerns on 11th embodiment. It is a perspective view which shows the auxiliary member of the manufacturing method of the liquid cooling jacket which concerns on 12th embodiment. It is a perspective view which shows the arrangement | positioning process of the manufacturing method of the liquid cooling jacket which concerns on 12th embodiment. It is a perspective view which shows the 1st friction stirring process and the 2nd friction stirring process of the manufacturing method of the liquid cooling jacket which concerns on 12th embodiment. It is sectional drawing which shows the 2nd friction stirring process of the manufacturing method of the liquid cooling jacket which concerns on 12th embodiment. It is sectional drawing which shows the removal process of the manufacturing method of the liquid cooling jacket which concerns on 12th embodiment.

[First embodiment]
A joining method according to a first embodiment of the present invention will be described in detail with reference to the drawings. In the joining method according to the present embodiment, a butt process, an arrangement process, a friction stirring process, and a removal process are performed. In the following description, “front surface” means a surface opposite to the “back surface”.

The butting process is a process in which the first metal member 1 and the second metal member 2 are butted in a substantially L-shaped cross section as shown in FIG. The first metal member 1 and the second metal member 2 are metal plate-like members. The material of the first metal member 1 and the second metal member 2 is not particularly limited as long as it is a metal that can be frictionally stirred. For example, aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy, etc. May be selected as appropriate. The plate | board thickness of the 1st metal member 1 and the 2nd metal member 2 is equivalent. The plate thicknesses of the first metal member 1 and the second metal member 2 may be set as appropriate.

In the butting process, the end surface 1a of the first metal member 1 and the side surface 2b of the second metal member 2 are butted to form a butting portion J1. The end surface 2a of the second metal member 2 and the side surface 1c of the first metal member 1 are flush with each other. In the butting step, the side surface 1b of the first metal member 1 and the end surface 2a of the second metal member 2 may be butted.

The placement step is a step of placing the auxiliary member 10 at the inner corner formed by the first metal member 1 and the second metal member 2. The auxiliary member 10 is a metal plate member. The auxiliary member 10 is not particularly limited as long as it is a metal capable of friction stirring, but in the present embodiment, the auxiliary member 10 is made of the same material as the first metal member 1 and the second metal member 2. The plate | board thickness of the auxiliary member 10 is suitably set so that the plasticization area | region W after the friction stirring process mentioned later may not become metal shortage.

In the arranging step, the end surface 10a of the auxiliary member 10 and the side surface 1b of the first metal member 1 are brought into contact with each other, and the side surface 10c of the auxiliary member 10 and the side surface 2b of the second metal member 2 are brought into surface contact. Thereby, auxiliary member 10 can be arranged stably. Moreover, the 1st metal member 1, the 2nd metal member 2, and the auxiliary member 10 are restrained immovably using a jig | tool (illustration omitted). In addition, although the auxiliary member 10 is plate-shaped in this embodiment, another shape may be sufficient.

The friction stirring step is a step of joining the butted portion J1 of the first metal member 1 and the second metal member 2 by friction stirring using the rotating tool F for bonding as shown in FIG. The joining rotary tool F includes a connecting portion F1 and a stirring pin F2. The joining rotary tool F corresponds to a “rotary tool” in the claims. The joining rotary tool F is made of, for example, tool steel. The connecting part F1 is a part connected to a rotating shaft (not shown) of the friction stirrer. The connecting portion F1 has a cylindrical shape.

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

In addition, when rotating the rotation tool F for joining counterclockwise, it is preferable to form a spiral groove clockwise as it goes to the front-end | tip from a base 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 proximal end to the distal end. By setting the spiral groove in this way, the metal plastically fluidized during friction stirring is guided to the tip side of the stirring pin F2 by the spiral groove. Thereby, the quantity of the metal which overflows outside the to-be-joined metal member (the 1st metal member 1, the 2nd metal member 2) can be decreased. The spiral groove may be omitted.

The rotating tool F for joining may be attached to a friction stirrer such as a machining center, but may be attached to, for example, an arm robot having a rotation driving means such as a spindle unit at the tip. By attaching the welding rotary tool F to the arm robot, the insertion angle of the rotation center axis of the welding rotary tool F can be easily changed.

In the friction stirring step, only the stirring pin F2 rotated to the right is inserted into the inner corner, and the metal member to be joined and the connecting portion F1 are moved relative to each other while being separated from each other. In other words, the friction stir welding is performed with the base end portion of the stirring pin F2 exposed. And the rotation tool F for joining is relatively moved along an inner corner in the state which made the 1st metal member 1, the 2nd metal member 2, the auxiliary member 10, and only the stirring pin F2 contact. In the present embodiment, the traveling direction of the joining rotary tool F is set so that the auxiliary member 10 is positioned on the left side in the traveling direction of the joining rotary tool F. The rotation direction and the traveling direction of the joining rotary tool F are not limited to those described above, and may be set as appropriate. For example, the joining rotary tool F may be rotated counterclockwise while the auxiliary member 10 is disposed on the left side in the traveling direction of the joining rotary tool F. The conditions such as the rotation direction of the bonding rotary tool F and the preferred positional relationship of the auxiliary member 10 will be described later.

What is necessary is just to set the insertion depth of the stirring pin F2 suitably according to the plate | board thickness of the 1st metal member 1 and the 2nd metal member 2, etc., making the stirring pin F2 and the butt | matching part J1 contact. Thereby, the butt J1 is friction stir welded. A plasticized region W is formed on the movement locus of the welding rotary tool F.

The insertion angle of the agitation pin F2 in the friction agitation process may be set as appropriate. In this embodiment, the angle between the first metal member 1 and the rotation center axis of the joining rotary tool F is set to about 45 °. ing. In the present embodiment, the insertion angle of the stirring pin F2 may be set to 45 to 75 °. Thereby, friction stir welding can be performed to a deep position of the butt portion J1. After the friction stirring step, burrs V and V are formed on the side surface 1b of the first metal member 1 and the end of the auxiliary member 10, respectively, as shown in FIG.

The removal step is a step of removing the auxiliary member 10 from the second metal member 2. In the removing step, the auxiliary member 10 is bent away from the second metal member 2 and removed from the second metal member 2. Moreover, the burr | flash V formed in the side surface 1b of the 1st metal member 1 is removed using a cutting device etc. Thereby, as shown in FIG. 4, the 1st metal member 1 and the 2nd metal member 2 are joined by cross-sectional substantially L shape.

According to the joining method according to the present embodiment described above, the first metal member 1 and the second metal member 2 are joined in a substantially L-shaped cross section, and the first metal member 1 and the second metal member 2 are joined. In addition, the auxiliary member 10 is also subjected to friction stir welding at the same time, so that a metal shortage at the joint (plasticized region W) can be prevented. Moreover, according to this embodiment, metal shortage can be prevented only by arrange | positioning the auxiliary member 10 only to one side instead of the both sides of the 1st metal member 1 and the 2nd metal member 2. FIG.

Further, according to the present embodiment, the burrs V are formed in the auxiliary member 10 by the friction stirring process, but it can be removed together with the auxiliary member 10 in the removing process. Thereby, the operation | work which removes a burr | flash can be performed easily. As shown in FIG. 3, after the friction stirring step, the end surface of the auxiliary member 10 is inclined so as to become thinner as it goes toward the inner corner. Although the auxiliary member 10 may use a removing device or the like, in this embodiment, the auxiliary member 10 can be easily removed manually.

Here, in the friction stirring process according to the present embodiment, the auxiliary member 10 is disposed on the left side in the traveling direction and the rotating tool F for rotation is rotated to the right, so the auxiliary member 10 side is the Ad side. The Ad side (shear side) is the side on which the magnitude of the feed speed is added from the magnitude of the tangential speed on the outer circumference of the welding rotary tool F. On the other hand, the side opposite to the Ad side is the Re side. The Re side (flow side) is a side on which the magnitude of the feed speed is subtracted from the magnitude of the tangential speed on the outer periphery of the welding rotary tool F.

In this embodiment, since the temperature of the plastic fluidized material is likely to increase on the Ad side as compared to the Re side of the plasticized region W, a large number of burrs V tend to be generated on the Ad side. In the present embodiment, the rotation direction and the traveling direction of the welding rotary tool F are set so that many burrs V are formed on the auxiliary member 10 side. Thereby, since the burr | flash V formed in the auxiliary member 10 is removed with the auxiliary member 10, the burr | flash removal process can be performed more easily.

For example, when the rotational speed of the rotating tool F for joining is set to be high, the temperature of the plastic fluidized material increases on the Ad side, but there is a tendency that burrs V are generated on the Re side due to the high rotational speed. . In such a case, the auxiliary member 10 may be disposed on the Re side (first metal member 1 side) to perform the friction stirring step. In the friction stirring step, which side of the traveling direction of the welding rotary tool F the burr V is generated differs depending on the joining conditions. The joining conditions include the rotational speed, rotational direction, traveling direction, moving speed (feed speed) of the rotating tool F for joining, the inclination angle (taper angle) of the stirring pin F2, the first metal member 1, and the second metal member 2. And the material of the auxiliary member 10, the thickness of the auxiliary member 10, etc., and the combination of these elements. It is preferable to set the side where the burrs V are generated or the side where the burrs V are generated to be the auxiliary member 10 side according to the joining conditions because the removal process can be easily performed.

[Modification of First Embodiment]
FIG. 5 is a cross-sectional view showing a friction stirring process according to a modification of the first embodiment. In the modification, the end surface 10a of the auxiliary member 10 and the side surface 2b of the second metal member 2 are brought into contact with each other, and the side surface 1b of the first metal member 1 and the side surface 10b of the auxiliary member 10 are in surface contact. The member 10 is arranged.

In the friction stirring step according to the modification, the traveling direction of the joining rotary tool F is set so that the auxiliary member 10 is positioned on the right side in the traveling direction of the joining rotary tool F while rotating the joining rotary tool F counterclockwise. Thereby, in the said modification, the auxiliary member 10 side turns into Ad side. The modification can also provide substantially the same effect as the bonding method according to the first embodiment.
In this case as well, when the rotational speed of the welding rotary tool F is set to be high, the temperature of the plastic fluidized material increases on the Ad side, but the burr V tends to occur on the Re side due to the higher rotational speed. It is in. In such a case, the auxiliary member 10 may be disposed on the Re side (second metal member 2 side) to perform the friction stirring step.

[Second Embodiment]
Next, the joining method according to the second embodiment will be described. As shown in FIG. 6, the joining method according to the second embodiment is different from the first embodiment in that an auxiliary member 20 having an L-shaped cross section is used. The joining method according to the second embodiment will be described with a focus on the differences from the first embodiment.

The joining method according to the present embodiment performs a butt process, an arrangement process, a friction stirring process, and a removal process. Since the matching process is the same as that of the first embodiment, description thereof is omitted. The arranging step is a step of arranging the auxiliary member 20 at the inner corners of the first metal member 1 and the second metal member 2.

The placement step is a step of placing the auxiliary member 20 in the inner corner composed of the first metal member 1 and the second metal member 2 as shown in FIG. The auxiliary member 20 is a metal member having an L-shaped cross section. The auxiliary member 20 is not particularly limited as long as it is a metal capable of friction stirring, but in the present embodiment, the auxiliary member 20 is made of the same material as the first metal member 1 and the second metal member 2. The plate | board thickness of the auxiliary member 20 is suitably set so that the plasticization area | region W after the friction stirring process mentioned later may not become metal shortage.

In the arranging step, the

outer surfaces

20c, 20c of the auxiliary member 20, the side surface 1b of the first metal member 1, and the side surface 2b of the second metal member 2 are brought into surface contact with each other. Moreover, the 1st metal member 1, the 2nd metal member 2, and the auxiliary member 20 are restrained immovably using a jig | tool (illustration omitted).

As shown in FIG. 7, the friction stirring step is a step of joining the butted portion J1 of the first metal member 1 and the second metal member 2 by friction stirring using the rotating tool F for joining. In the friction stirring step, the stirring pin F2 rotated to the right is inserted from the inner corner of the auxiliary member 20 (the corners of the

inner surfaces

20b and 20b), and the insertion depth of the stirring pin F2 is set so as to reach the abutting portion J1. In the friction stirring step, only the stirring pin F2 rotated to the right is inserted into the inner corner, and the bonded metal member and the connecting portion F1 are moved while being separated from each other. In other words, the friction stir welding is performed with the base end portion of the stirring pin F2 exposed. And the rotation tool F for joining is relatively moved along an inner corner in the state which contacted the 1st metal member 1, the 2nd metal member 2, the auxiliary member 20, and the stirring pin F2. Thereby, the butt J1 is friction stir welded. A plasticized region W is formed on the movement locus of the welding rotary tool F.

The removing step is a step of removing the

auxiliary members

20 and 20 separated by the friction stirring step from the first metal member 1 and the second metal member 2 as shown in FIG. In the removing step, the

auxiliary members

20 and 20 are bent and removed in directions away from the first metal member 1 and the second metal member 2, respectively.

According to the joining method according to the present embodiment described above, the first metal member 1 and the second metal member 2 are joined in a substantially L-shaped cross section, and the first metal member 1 and the second metal member 2 are joined. In addition, the auxiliary member 20 can also be friction stir welded at the same time to prevent metal shortage at the joint (plasticization region W).

Further, according to the present embodiment, the burrs V and V are formed on the

auxiliary members

20 and 20 divided by the friction stirring process, respectively. However, the auxiliary member 20 can be removed together in the removing process. Thereby, the operation | work which removes a burr | flash can be performed easily. In the second embodiment, the divided

auxiliary members

20 and 20 are formed on both sides of the inner corner, so that the work of removing burrs becomes easier. As shown in FIG. 8, after the friction stirring step, the end surface of the auxiliary member 20 is inclined so that the plate thickness becomes thinner as it goes to the inner corner. Although the auxiliary member 20 may use a removing device or the like, in the present embodiment, the auxiliary member 20 can be easily removed manually.

[Third embodiment]
Next, the joining method according to the third embodiment of the present invention will be described. As shown in FIG. 9, the joining method according to the third embodiment is different from the first embodiment in that the first metal member 1 and the second metal member 2 are butted in a T-shaped cross section. The joining method according to the third embodiment will be described with a focus on differences from the first embodiment. The joining method which concerns on 3rd embodiment performs a butt | matching process, an arrangement | positioning process, a friction stirring process, and a removal process.

The butting process is a process in which the first metal member 1 and the second metal member 2 are butted in a T-shaped cross section. In the butting step, the side surface 1b of the first metal member 1 and the end surface 2a of the second metal member 2 are butted to form a butting portion J2.

The arranging step is a step of arranging the

auxiliary members

10 and 10 at inner corners formed on both sides with the second metal member 2 sandwiched between the first metal member 1 and the second metal member 2. At the inner corner on one side, the side surface 10c of the auxiliary member 10 and the side surface 2b of the second metal member 2 are brought into surface contact. In the inner corner on the other side, the side surface 10c of the auxiliary member 10 and the side surface 1b of the first metal member 1 are brought into surface contact. Moreover, the 1st metal member 1, the 2nd metal member 2, and the auxiliary member 10 are restrained immovably using a jig | tool (illustration omitted).

As shown in FIG. 9, the friction stirring step is a step of joining the abutting portion J <b> 2 between the first metal member 1 and the second metal member 2 by friction stirring using the rotating tool F for joining. In the friction stirring step, friction stirring is performed on the inner corners formed on both sides of the second metal member 2 in the same manner as the friction stirring step according to the first embodiment. Thereby, the plasticization area | regions W and W are formed along the butt | matching part J2.

The removal step is a step of removing the auxiliary members 10 from the first metal member 1 and the second metal member 2. In the removing step, the auxiliary member 10 is bent from the first metal member 1 or the second metal member 2 and removed from the second metal member 2. Moreover, the burr | flash V formed in the side surface 1b of the 1st metal member 1 or the side surface 2c of the 2nd metal member 2 is removed using a cutting device etc. By the above, the 1st metal member 1 and the 2nd metal member 2 are joined by cross-sectional substantially T shape.

According to the joining method according to the present embodiment described above, the first metal member 1 and the second metal member 2 are joined in a substantially T-shaped cross section, and the first metal member 1 and the second metal member 2 are joined. In addition, the auxiliary member 10 is also subjected to friction stir welding at the same time, thereby preventing metal shortage at each joint (plasticization region W). In the friction stirring step, the insertion depth and insertion angle of the welding rotary tool F may be set so that the adjacent plasticized regions W, W overlap. By overlapping the plasticized regions W and W, airtightness and watertightness can be improved.

[Fourth embodiment]
Next, the joining method according to the fourth embodiment of the present invention will be described. As shown in FIG. 10, the joining method according to the fourth embodiment is different from the third embodiment in that

auxiliary members

20 and 20 having an L-shaped cross section are used. The joining method according to the fourth embodiment will be described with a focus on differences from the third embodiment. The joining method according to the fourth embodiment performs a butting process, an arranging process, a friction stirring process, and a removing process. Since the matching process is the same as that of the third embodiment, description thereof is omitted.

The placement step is a step of arranging the

auxiliary members

20 and 20 at inner corners formed on both sides of the second metal member 2 with the second metal member 2 sandwiched between the first metal member 1 and the second metal member 2. The auxiliary member 20 is made of metal and has an L-shaped cross section. In the arrangement step, the

outer surfaces

20c and 20c of the auxiliary member 20 are brought into surface contact with the side surface 1b of the first metal member 1 and the side surfaces 2b and 2c of the second metal member 2, respectively. Moreover, the 1st metal member 1, the 2nd metal member 2, and the

auxiliary members

20 and 20 are restrained immovably using a jig | tool (illustration omitted).

As shown in FIG. 10, the friction stirring step is a step of joining the abutting portion J2 between the first metal member 1 and the second metal member 2 by friction stirring using the rotating tool F for bonding. In the friction stirring step, friction stirring is performed on the inner corners formed on both sides of the second metal member 2 in the same manner as the friction stirring step according to the second embodiment. Thereby, the plasticization area | regions W and W are formed along the butt | matching part J2.

The removal step is a step of removing the

auxiliary members

20 and 20 separated in the friction stirring step from the first metal member 1 and the second metal member 2. In the removing step, the divided

auxiliary members

20 and 20 are bent and removed in directions away from the first metal member 1 and the second metal member 2.

According to the joining method according to the present embodiment described above, the first metal member 1 and the second metal member 2 are joined in a substantially T-shaped cross section, and the first metal member 1 and the second metal member 2 are joined. In addition, the auxiliary member 20 is also subjected to friction stir welding at the same time, thereby preventing metal shortage at each joint (plasticized region W). In the friction stirring step, the insertion depth and insertion angle of the welding rotary tool F may be set so that the adjacent plasticized regions W, W overlap.

Although the embodiment of the present invention has been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, although the removal process is performed in the present embodiment, the

auxiliary members

10 and 20 may be left as they are in the first metal member 1 or the second metal member 2 without being removed.

In the butting step, the end surface 1a of the first metal member 1 and the end surface 2a of the second metal member 2 may be cut obliquely so that both members are butted.

[Fifth embodiment]
A joining method according to a fifth embodiment of the present invention will be described in detail with reference to the drawings. In the joining method according to the present embodiment, a preparation process, a butting process, an arranging process, a friction stirring process, and a removing process are performed.

The preparation step is a step of preparing the first metal member 101, the second metal member 102, and the auxiliary member 110 as shown in FIG. Both the first metal member 101 and the second metal member 102 have a rectangular parallelepiped shape (plate shape). The first metal member 101 is larger than the second metal member 102. “Two metal members having different shapes of the surfaces to be faced” in the claims means that the shape of the surfaces to be faced of the metal members is different from that of the first metal member 101 as in this embodiment. This also includes the case where the surface 101b and the surface of the second metal member 102, such as the back surface 102c, have different sizes (similar cases).

The material of the first metal member 101 and the second metal member 102 is not particularly limited as long as it is a metal that can be frictionally stirred. For example, aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy, etc. May be selected as appropriate.

The auxiliary member 110 is a metal thin plate-like frame member having a rectangular hollow portion 111 at the center. The auxiliary member 110 is not particularly limited as long as it is a metal capable of friction stirring, but in the present embodiment, the auxiliary member 110 is made of the same material as the first metal member 101 and the second metal member 102. A slit 110d that extends continuously in the width direction is formed in a part of the auxiliary member 110.

The butting process is a process in which the first metal member 101 and the second metal member 102 are butted together. In the butting process, the center portion of the front surface 101b of the first metal member 101 and the back surface 102c of the second metal member 102 are butted. Thereby, the butt | matching part J11 is formed. In addition, an inner corner is formed by the surface 101 b of the first metal member 101 and the four side surfaces 102 d of the second metal member 102. Further, a frame-shaped exposed portion that is not covered with the second metal member 102 is formed on the surface 101 b of the first metal member 101.

The placement step is a step of placing the auxiliary member 110 in the inner corner as shown in FIG. In the arranging step, the second metal member 102 is inserted through the hollow portion 111 of the auxiliary member 110, and the auxiliary member 110 is arranged on the surface 101 b of the first metal member 101. The planar shape of the auxiliary member 110 is the same as the exposed portion of the first metal member 101. That is, when the hollow portion 111 of the auxiliary member 110 is passed through the second metal member 102, the second metal member 102 is disposed on the exposed portion of the surface 101b of the first metal member 101 without a gap. The inner peripheral edge of the auxiliary member 110 contacts the side surface 102d of the second metal member 102 or faces the side surface 102d with a fine gap. The plate | board thickness of the auxiliary member 110 is suitably set to such an extent that the plasticization area | region W after the friction stirring process mentioned later does not become metal shortage. Moreover, the 1st metal member 101, the 2nd metal member 102, and the auxiliary member 110 are restrained on a mount so that a movement is impossible using a jig | tool (illustration omitted).

The friction stirring step is a step of joining the butted portion J11 of the first metal member 101 and the second metal member 102 by friction stirring using the rotating tool F for bonding, as shown in FIGS. The joining rotary tool F includes a connecting portion F1 and a stirring pin F2.

In the present embodiment, the spiral groove is formed in a counterclockwise direction from the base end toward the tip end in order to rotate the joining rotary tool F to the right. 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. By setting the spiral groove in this way, the metal plastically fluidized during friction stirring is guided to the tip side of the stirring pin F2 by the spiral groove. Thereby, the quantity of the metal which overflows outside the to-be-joined metal member (the 1st metal member 101, the 2nd metal member 102, and the auxiliary member 110) can be decreased. The spiral groove may be omitted.

The rotating tool F for joining may be attached to a friction stirrer such as a machining center, but may be attached to, for example, an arm robot having a rotation driving means such as a spindle unit at the tip. By attaching the joining rotary tool F to the arm robot, the inclination angle of the rotation center axis Fc of the joining rotary tool F can be easily changed.

In the friction agitation step, as shown in FIG. 13, first, the agitation pin F2 of the rotating tool F for rotation rotated to the start position Sp set on the surface 110b of the auxiliary member 110 is inserted and moved toward the inner corner. Move. When the stirring pin F2 reaches the inner corner, the rotation center axis Fc of the joining rotary tool F is inclined outward with respect to the second metal member 102 as shown in FIG. Then, the joining rotary tool F is relatively moved over the periphery of the second metal member 102 in the inclined state, and the butt joint J1 is friction stir welded. A plasticized region W is formed in the movement locus of the welding rotary tool F.

In the friction stirring process, only the stirring pin F2 rotated to the right is inserted into the abutting portion J11, and the metal member to be joined and the connecting portion F1 are moved relative to each other while being separated from each other. In other words, the friction stir welding is performed with the base end portion of the stirring pin F2 exposed. Then, the joining rotary tool F is relatively moved along the abutting portion J11 in a state where the first metal member 101, the second metal member 102, the auxiliary member 110, and the stirring pin F2 are in contact with each other.

In this embodiment, the traveling direction of the joining rotary tool F is set so that the auxiliary member 110 is positioned on the right side in the traveling direction of the joining rotary tool F. The rotation direction and the traveling direction of the joining rotary tool F are not limited to those described above, and may be set as appropriate. For example, the joining rotary tool F may be rotated counterclockwise while the auxiliary member 110 is disposed on the right side in the traveling direction of the joining rotary tool F. Alternatively, the auxiliary member 110 may be arranged on the left side in the traveling direction of the joining rotary tool F, and the joining rotary tool F may be rotated to the left or right. The preferable positional relationship between the auxiliary member 110 and the conditions such as the rotation direction of the joining rotary tool F will be described later.

The insertion depth of the stirring pin F2 may be set so that the stirring pin F2 and the butting portion J11 are in contact with each other. As shown in FIG. 15, when the joining rotary tool F is made to make a round around the second metal member 102 and the plasticizing region W is overlapped, joining is performed at the end position Ep set on the surface 110 b of the auxiliary member 110. The rotary tool F is removed. At this time, the punched hole of the bonding rotary tool F is formed, but the welded hole may be repaired by overlay welding. Alternatively, the joining rotary tool F may be gradually pulled out so as not to form a punched hole.

The removal step is a step of removing the auxiliary member 10 from the first metal member 1 as shown in FIG. The auxiliary member 110 flips up the end of the auxiliary member 110 with the slit 110d (see FIG. 15) as a boundary, and as shown in FIG. 17, the auxiliary member 110 is away from the surface 101b of the first metal member 101. And the auxiliary member 110 is removed from the first metal member 101.

According to the joining method according to the present embodiment described above, the first metal member 101 and the second metal member 102 are joined, and in addition to the first metal member 101 and the second metal member 102, the auxiliary member 110 is also used. By performing friction stir welding at the same time, it is possible to prevent metal shortage at the joint (plasticized region W).

Further, according to the present embodiment, the burr V is formed on the auxiliary member 110 by the friction stirring process, but the auxiliary member 110 can be removed together in the removing process. Thereby, the operation | work which removes the burr | flash V can be performed easily. Although the auxiliary member 110 may use a removing device or the like, in the present embodiment, the auxiliary member 110 can be easily removed manually. Moreover, in this embodiment, since only the stirring pin F2 is made to contact with a to-be-joined metal member, the load which acts on a friction stirring apparatus can be reduced compared with the case where the shoulder part of a rotary tool is made to contact.

In addition, since the friction stir is performed in a state where only the stirring pin F2 of the rotating tool F for welding is in contact with the first metal member 101, the second metal member 102, and the auxiliary member 110, the stirring pin is inserted to a deep position of the butt portion J11. Can be inserted. Thereby, the 1st metal member 101 and the 2nd metal member 102 can be joined suitably.

Further, as shown in FIG. 14, in the friction stir process according to the present embodiment, the auxiliary member 110 is arranged on the right side in the traveling direction and the welding rotary tool F is rotated to the right, so the auxiliary member 110 side is the Re side.

For example, when the rotational speed of the welding rotary tool F is low, the temperature of the plastic fluidized material is more likely to rise on the Ad side than on the Re side of the plasticizing region W, so that more burrs V are generated on the Ad side. Tend to. On the other hand, for example, when the rotational speed of the bonding rotary tool F is high, the temperature of the plastic fluidized material increases on the Ad side, but there is a tendency that burrs V are generated on the Re side due to the higher rotational speed.

In this embodiment, since the rotation speed of the welding rotary tool F is set to be high, burrs V are generated on the Re side, that is, on the auxiliary member 110 side. That is, in the present embodiment, the rotational speed, the rotational direction, the traveling direction, and the like of the joining rotary tool F are set so that many burrs V are formed on the auxiliary member 110 side. Thereby, since the burr | flash V formed in the auxiliary member 110 is removed with the auxiliary member 110, the burr removal process can be performed more easily. Moreover, the moving speed (feeding speed) of the joining rotary tool F can be increased by setting the rotational speed of the joining rotary tool F faster. Thereby, a joining cycle can be shortened.

As described above, in the friction stirring step, which side of the traveling direction of the welding rotary tool F the burr V is generated varies depending on the joining conditions. The joining conditions include the rotational speed, the rotational direction, the traveling direction, the moving speed (feeding speed), the inclination angle (taper angle) of the stirring pin F2, the first metal member 101, and the second metal member 102. Further, it is determined by each element such as the material of the auxiliary member 110, the thickness of each member, and the combination of these elements. It is preferable to arrange the auxiliary member 110 on the side where burrs V are generated or on the side where many burrs V are generated, depending on the joining conditions, because the burr removing step can be easily performed.

Further, since the slit 110d is provided in the auxiliary member 110, the auxiliary member 110 can be easily removed from the slit 110d as a starting point in the removal process. In the friction stirring step, the joining strength can be increased by overlapping the start and end of the plasticized region W.

[Sixth embodiment]
Next, the joining method according to the sixth embodiment will be described. In the joining method according to the present embodiment, a preparation process, a butting process, an arranging process, a friction stirring process, and a removing process are performed. As shown in FIG. 18, the sixth embodiment is mainly different from the fifth embodiment in that the auxiliary member 120 is arranged along the second metal member 102 side. In the description according to the present embodiment, the description will focus on parts that are different from the fifth embodiment.

The preparation step is a step of preparing a first metal member 101, a second metal member 102, and four auxiliary members 120 as shown in FIG. The auxiliary member 120 is a plate-like member made of the same material as the first metal member 101 and the second metal member 102. The plate | board thickness of the auxiliary member 120 is suitably set to such an extent that the plasticization area | region W after the friction stirring process mentioned later does not become metal shortage. The height of the auxiliary member 120 is substantially equal to the height of the side surface 102 d of the second metal member 102. The length of the auxiliary member 120 is substantially the same as the length of the side surface 102d. In addition, although the auxiliary member 120 is comprised by the four plate-shaped members in this embodiment, it is good also as an integrally formed frame-shaped member.

Since the matching process is the same as that of the fifth embodiment, the description is omitted. An arrangement | positioning process is a process of arrange | positioning the auxiliary member 20 in an inner corner. As shown in FIGS. 18 and 19, in the arranging step, four auxiliary members 120 are arranged on the four side surfaces 102 d of the second metal member 102, respectively. That is, in the arranging step, the side surface 102 d of the second metal member 102 and the side surface 120 b of the auxiliary member 120 are brought into surface contact, and the outer peripheral surface of the second metal member 102 is covered with the auxiliary member 120. The end surface of the auxiliary member 120 is brought into contact with the surface 101 b of the first metal member 101.

20 and FIG. 21, the friction stirring step is a step of joining the butted portion J1 between the first metal member 101 and the second metal member 102 by friction stirring using the welding rotary tool F. First, the agitation pin F2 of the rotating tool for welding F rotated counterclockwise is inserted into the start position Sp set on the surface 101b of the first metal member 101, and is relatively moved toward the inner corner. When the agitating pin F2 reaches the inner corner, the rotation center axis Fc of the welding rotary tool F is inclined outward as shown in FIG. And the rotating tool F for joining is relatively moved over the circumference | surroundings of the 2nd metal member 2 in the inclined state, and the butt | matching part J1 is friction-stir-welded. A plasticized region W is formed in the movement locus of the welding rotary tool F.

In the friction stirring step, only the stirring pin F2 rotated counterclockwise is inserted into the butting portion J1, and the metal member to be joined and the connecting portion F1 are moved relative to each other while being separated from each other. In other words, the friction stir welding is performed with the base end portion of the stirring pin F2 exposed. And the rotation tool F for joining is relatively moved along the abutting part J11 in the state which made the 1st metal member 101, the 2nd metal member 102, the auxiliary member 120, and the stirring pin F2 contact.

In this embodiment, the traveling direction of the joining rotary tool F is set so that the auxiliary member 120 is positioned on the left side in the traveling direction of the joining rotary tool F. Further, the rotational speed of the joining rotary tool F is rotated at such a high speed that burrs V are generated on the Re side. What is necessary is just to set the insertion depth of the stirring pin F2 so that the stirring pin F2 and the butt | matching part J11 may contact. As shown in FIG. 20, when the joining rotary tool F is made to make a round around the second metal member 102 and the plasticized region W is overlapped, the end position Ep set on the surface 101 b of the first metal member 101. Then, the joining rotary tool F is detached.

The removal step is a step of removing the four auxiliary members 120 from the second metal member 102 as shown in FIG. In the removing step, the auxiliary member 120 is bent in a direction away from the side surface 102d of the second metal member 102, and the auxiliary member 120 is removed from the second metal member 102, respectively.

According to the joining method according to the present embodiment described above, the first metal member 101 and the second metal member 102 are joined, and in addition to the first metal member 101 and the second metal member 102, the auxiliary member 120 is also used. By performing friction stir welding at the same time, it is possible to prevent metal shortage at the joint (plasticized region W).

Further, according to the present embodiment, the burrs V are formed in the auxiliary member 120 by the friction stirring process, but the auxiliary member 120 can be removed together in the removing process. Thereby, the operation | work which removes the burr | flash V can be performed easily. Although the auxiliary member 120 may use a removing device or the like, in the present embodiment, the auxiliary member 120 can be easily removed manually. Moreover, in this embodiment, since only the stirring pin F2 is made to contact with a to-be-joined metal member, the load which acts on a friction stirring apparatus can be reduced compared with the case where the shoulder part of a rotary tool is made to contact.

Further, as shown in FIG. 21, in the friction stirring step according to the present embodiment, the auxiliary member 120 is disposed on the left side in the traveling direction of the welding rotary tool F, and the auxiliary member 120 is rotated in order to rotate the bonding rotary tool F counterclockwise. The side is the Re side. In the present embodiment, since the rotation speed of the bonding rotary tool F is set to be high, burrs V are generated on the Re side, that is, on the auxiliary member 120 side. That is, in the present embodiment, the rotational speed, the rotational direction, the traveling direction, and the like of the bonding rotary tool F are set so that a large number of burrs V are formed on the auxiliary member 20 side. Thereby, since the burr | flash V formed in the auxiliary member 120 is removed with the auxiliary member 120, the burr removal process can be performed more easily. Moreover, the moving speed (feeding speed) of the joining rotary tool F can be increased by setting the rotational speed of the joining rotary tool F faster. Thereby, a joining cycle can be shortened. Moreover, you may arrange | position the auxiliary member 120 in an inner corner so that it may follow the side surface 102d of the 2nd metal member 102 like the arrangement | positioning process of this embodiment.

[Seventh embodiment]
Next, the joining method according to the seventh embodiment will be described. In the joining method according to the present embodiment, a preparation process, a butting process, an arranging process, a friction stirring process, and a removing process are performed. As shown in FIG. 23, the seventh embodiment is mainly different from the sixth embodiment in that the second metal member 103 has a cylindrical shape.

The preparation step is a step of preparing a first metal member 201, a second metal member 203, and an auxiliary member 230 as shown in FIG. The second metal member 203 is a metal member having a cylindrical shape. The material of the second metal member 203 is the same as that of the first metal member 201.

The auxiliary member 230 is a metal member having a thin plate shape and a cylindrical shape. The material of the auxiliary member 230 is the same as that of the first metal member 201. The inner diameter of the auxiliary member 230 is substantially equal to the outer diameter of the second metal member 203. The plate thickness of the auxiliary member 230 is appropriately set to such an extent that the plasticized region W does not run out of metal during the friction stirring process described later. A part of the auxiliary member 230 is formed with a slit 230d continuous in the height direction.

The butting process is a process in which the surface 201b of the first metal member 201 and the end surface 203c of the second metal member 203 are butted. The butted portion J12 is formed by butting the surface 201b of the first metal member 201 and the end surface 203c of the second metal member 203. The planar shape of the butted portion J12 is a circle. By the butting process, an inner corner is formed by the surface 201 b of the first metal member 201 and the outer peripheral surface 203 d of the second metal member 203.

The placement step is a step of placing the auxiliary member 230 at the inner corner as shown in FIG. In the arrangement step, the side surface 230b of the auxiliary member 230 is brought into surface contact with the outer peripheral surface 203d of the second metal member 203 while the end surface of the auxiliary member 230 is brought into contact with the surface 201b of the first metal member 201.

Although the specific illustration is omitted, the friction stirring step is a step of joining the abutting portion J12 of the first metal member 201 and the second metal member 203 by friction stirring using the welding rotary tool F. The joining conditions of the friction stirring step are set so that burrs are generated in the auxiliary member 230 in the same manner as in the sixth embodiment. The friction stir process is substantially the same as the friction stir process of the sixth embodiment, and detailed description thereof is omitted.

The removal step is a step of removing the auxiliary member 230 from the second metal member 203, although a specific illustration is omitted. In the removing step, the auxiliary member 230 is removed from the second metal member 203 by bending the upper end portion of the auxiliary member 230 in a direction away from the second metal member 203. In the removing step, the auxiliary member 230 can be easily removed by turning the slit 230d as a starting point.

According to the joining method according to the seventh embodiment described above, substantially the same effect as the joining method according to the sixth embodiment can be obtained. Moreover, according to the joining method which concerns on this embodiment, the 1st metal member 201 which exhibits plate shape, and the 2nd metal member 203 which exhibits columnar shape can be joined. Moreover, in addition to the 1st metal member 201 and the 2nd metal member 203, the auxiliary member 230 can be friction-stirred simultaneously, and the metal shortage of a junction part (plasticization area | region W) can be prevented. Moreover, according to the removal process which concerns on this embodiment, the auxiliary member 230 can be easily removed starting from the slit 230d.

In the joining method according to the seventh embodiment, for example, the second metal member may be a columnar member having a polygonal cross section. Further, a through hole penetrating in the height direction of the first metal member 201 may be provided. In the butting process in this case, butting is performed so that the through hole of the first metal member 201 is covered with the second metal member.

[Eighth embodiment]
Next, the joining method according to the eighth embodiment will be described. In the joining method according to the eighth embodiment, a preparation process, a butting process, an arranging process, a friction stirring process, and a removing process are performed. As shown in FIG. 25, the eighth embodiment is different from the seventh embodiment in that the second metal member 204 has a cylindrical shape.

The preparation step is a step of preparing a first metal member 201, a second metal member 204, and an auxiliary member 240 as shown in FIG. A through hole 201e that penetrates in the height direction is formed in the center of the first metal member 201. The second metal member 204 is a metal member having a cylindrical shape. The material of the auxiliary member 240 is the same as that of the first metal member. The hollow portion of the second metal member 204 communicates with the through hole 201e.

The auxiliary member 240 is a plate-shaped metal member provided with a hollow portion 241. The material of the auxiliary member 240 is the same as that of the first metal member 201. The inner diameter of the hollow portion 241 is substantially the same as the outer diameter of the second metal member 204. The plate thickness of the auxiliary member 240 is appropriately set to such an extent that the plasticized region W does not run out of metal during the friction stirring step described later. The auxiliary member 240 has a slit 240d continuous in the width direction.

The butting process is a process of butting the surface 201b of the first metal member 201 and the end surface 204c of the second metal member 204 as shown in FIG. The butted portion J13 is formed by butting the surface 201b of the first metal member 201 with the end surface 204c of the second metal member 204. The planar shape of the butting portion J13 is a ring shape. By the butting process, an inner corner is formed by the surface 201b of the first metal member 1 and the outer peripheral surface 204d of the second metal member 204.

The placement step is a step of placing the auxiliary member 240 at the inner corner as shown in FIG. In the arranging step, the back surface 240 c of the auxiliary member 240 is brought into surface contact with the front surface 201 b of the first metal member 201.

Although the specific illustration is omitted, the friction stirring step is a step of joining the abutting portion J13 of the first metal member 201 and the second metal member 204 by friction stirring using the welding rotary tool F. The joining conditions of the friction stirring process are set so that burrs are generated in the auxiliary member 240 in the same manner as in the seventh embodiment. The friction stir process is substantially the same as the friction stir process of the seventh embodiment, and detailed description thereof is omitted.

The removal step is a step of removing the auxiliary member 240 from the first metal member 201, although a specific illustration is omitted. In the removing step, the auxiliary member 240 is bent in a direction away from the first metal member 201, and the auxiliary member 240 is removed from the first metal member 201. Further, in the removing process, it is easy to remove if the slit 240d is turned to the starting point.

According to the joining method according to the eighth embodiment described above, substantially the same effect as the joining method according to the seventh embodiment can be obtained. Moreover, according to the joining method which concerns on this embodiment, the 1st metal member 201 which exhibits plate shape, and the 2nd metal member 204 which exhibits cylindrical shape can be joined. Moreover, in addition to the 1st metal member 201 and the 2nd metal member 204, the auxiliary member 240 can be friction-stirred simultaneously, and the metal shortage of a junction part (plasticization area | region W) can be prevented. Moreover, according to the removal process which concerns on this embodiment, the auxiliary member 240 can be easily removed starting from the slit 240d.

In the joining method according to the eighth embodiment, the second metal member 204 has a cylindrical shape, but may be a cylindrical member having another cross section, for example. Further, the through hole 201e of the first metal member 201 may not be provided.

In the above embodiment, the auxiliary member is arranged only on one side with respect to the joining rotary tool F. However, the auxiliary member may be arranged on both sides of the joining rotary tool F. In the removing step in this case, the auxiliary members arranged on both sides of the joining rotary tool F are removed. That is, in the removing step of the present invention, the auxiliary member may be removed from at least one of the first metal member 201 and the second metal member 203. Moreover, in the arrangement | positioning process of 7th embodiment and 8th embodiment, the whole circumference of the outer peripheral surface 203d of the 2nd metal member 203 or the whole surface 201b (exposed part) of the 1st metal member 201 is made into the

auxiliary members

230 and 240. Although each is covered, you may make it cover at least one part.

[Ninth embodiment]
A manufacturing method of a liquid cooling jacket and a liquid cooling jacket according to a ninth embodiment of the present invention will be described in detail with reference to the drawings. In the method for manufacturing a liquid cooling jacket according to the present embodiment, as shown in FIG. 27, a preparation process, a butting process, an arranging process, a friction stirring process, and a removing process are performed.

The preparation step is a step of preparing the jacket main body 302 and the sealing body 303. The jacket body 302 includes a bottom portion 310, a peripheral wall portion 311, and a support portion 312. The material of the jacket main body 302 may be a metal capable of friction stir, but is formed of a metal capable of friction stir, such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy. . The jacket main body 302 is a box-shaped member having an upper opening. The bottom portion 310 has a rectangular shape in plan view. The peripheral wall portion 311 rises from the periphery of the bottom portion 310 and has a rectangular frame shape.

The peripheral wall portion 311 includes

wall portions

311A, 311B, 311C, and 311D. The

walls

311A and 311B are opposed to each other and are short sides. The

wall portions

311C and 311D are opposed to each other and are long side portions. A recess 313 is formed inside the jacket body 302. A step portion 315 is formed on the inner peripheral edge of the end surface 311 a of the peripheral wall portion 311. The step portion 315 includes a step bottom surface 315a formed at a position lower than the end surface 311a and a step side surface 315b rising from the step bottom surface 315a.

The support portion 312 rises from the bottom portion 310 and extends from the wall portion 311B of the peripheral wall portion 311. The support portion 312 may be formed away from the peripheral wall portion 311 or may be omitted. The end surface 312a of the support portion 312 is flush with the step bottom surface 315a. A projecting portion 312 b is formed on the end surface 312 a of the support portion 312. The protrusion 312b has a cylindrical shape in the present embodiment. The protruding portion 312 b is a portion that is fitted with the sealing body 303.

The sealing body 303 is a metal member that covers the opening of the jacket main body 302. The material of the sealing body 303 is not particularly limited, but is formed of the same material as that of the jacket body 302 in the present embodiment. The sealing body 303 includes a main body portion 321 and a plurality of fins 322.

The main body 321 is a plate-like member having a rectangular shape in plan view. The main body portion 321 is a part placed on the step portion 315. The plate | board thickness dimension of the main-body part 321 is larger than the height dimension of the level | step difference side surface 315b. In the present embodiment, the plate thickness dimension of the main body 321 is about twice the height dimension of the step side surface 315b. The fins 322 are plate-like members formed on the back surface 321b of the main body portion 321. A plurality of fins 322 are formed at a predetermined interval.

Three concave grooves 323 are formed on the back surface 321b of the main body 321. The concave groove 323 is formed so that the protruding portion 312b is inserted at a position corresponding to the protruding portion 312b. The hollow portion of the concave groove 323 has a cylindrical shape in the present embodiment, but may be any shape as long as the protruding portion 312b can be inserted.

The butting process is a process of matching the jacket main body 302 and the sealing body 303 as shown in FIG. As shown in FIG. 29, in the butting process, the sealing body 303 is placed on the step portion 315 of the jacket main body 302. The side surface 321c of the main body portion 321 and the step side surface 315b are abutted to form the abutting portion J31. Further, the back surface 321b of the main body 321 and the step bottom surface 315a are overlapped. The butting portion J31 is formed over the entire circumference of the sealing body 303. Further, an inner corner is formed by the end surface 311 a of the peripheral wall portion 311 and the four side surfaces 321 c of the main body portion 321. In the butting step, the recessed groove 323 of the sealing body 303 is fitted into the protruding portion 312 b of the support portion 312. Thereby, the fitting part J32 is formed.

The placement step is a step of placing the auxiliary member 330 on the jacket main body 302 as shown in FIG. The auxiliary member 330 is a plate-like member in which a hollow portion 331 having a rectangular shape in plan view is formed. The plate thickness dimension of the auxiliary member 330 is appropriately set to such an extent that a metal shortage does not occur at the joint in the second friction stirring step described later. The hollow portion 331 has the same shape as the planar shape of the sealing body 303. The material of the auxiliary member 330 is not particularly limited as long as it is a metal capable of friction stir, but in this embodiment, the material is the same as that of the jacket main body 302 and the sealing body 303. A slit 332 that is continuous in the width direction is formed in a part of the auxiliary member 330.

In the arranging step, the auxiliary member 330 is arranged on the end surface 311a of the peripheral wall 311 as shown in FIG. Thereby, the end surface 311 a is covered with the auxiliary member 330. The inner peripheral edge of the auxiliary member 330 is in surface contact with the side surface 321c of the main body 321 or is arranged with a fine gap. In the present embodiment, the entire end surface 311a is covered with the auxiliary member 330, but the size of the auxiliary member 330 may be adjusted so that a part of the end surface 311a is covered.

The friction stir process is a process in which the jacket main body 302 and the sealing body 303 are friction stir welded using the rotating tool F for joining. As shown in FIGS. 32 and 33, the joining rotary tool F includes a connecting portion F1 and a stirring pin F2. In the present embodiment, the spiral groove is formed in a counterclockwise direction from the proximal end toward the distal end in order to rotate the joining rotary tool F to the right. By setting the spiral groove in this way, the metal plastically fluidized during friction stirring is guided to the tip side of the stirring pin F2 by the spiral groove. Thereby, the quantity of the metal which overflows outside the to-be-joined metal member (the jacket main body 302, the sealing body 303, and the auxiliary member 330) can be decreased.

In the friction stirring step of the present embodiment, a first friction stirring step and a second friction stirring step are performed. The first friction stirring step is a step of joining the support portion 312 and the sealing body 303. As shown in FIG. 32, in the first friction agitation step, the agitation pin F2 of the rotating tool F for bonding rotated to the right is inserted into the start position Sp1 set on the surface 321a of the sealing body 303, and the wall 311B is The auxiliary member 330 is relatively moved toward the end position Ep1 set. As shown in FIG. 33, in the first friction stirring process, the stirring pin F2 reaches the protruding portion 312b, or the protruding portion 312b and the groove 323 are in contact with the stirring pin F2 only in the sealing body 303. The fitting portion J32 is friction stir welded. A plasticized region W1 is formed in the movement locus of the welding rotary tool F. When the joining rotary tool F reaches the end position Ep1, the joining rotary tool F is once detached. At this time, a punch hole of the bonding rotary tool F is formed, but overlay welding may be performed on the punch hole. Alternatively, the joining rotary tool F may be gradually pulled out so as not to form a punched hole.

The second friction stirring step is a step of joining the peripheral wall portion 311 and the sealing body 303. As shown in FIG. 34, first, the agitation pin F2 of the welding rotary tool F rotated to the right is inserted into the start position Sp2 set on the auxiliary member 330, and is relatively moved toward the inner corner. When the stirring pin F2 reaches the inner corner, as shown in FIG. 35, the rotation center axis Fc of the joining rotary tool F is inclined outward. And the rotating tool F for joining is relatively moved over the circumference | surroundings of the sealing body 303 in the inclined state, and the butt | matching part J31 is friction stir-welded. A plasticized region W2 is formed in the movement locus of the welding rotary tool F.

In the second friction stirring step, only the stirring pin F2 rotated to the right is inserted into the abutting portion J31, and the metal member to be joined and the connecting portion F1 are moved relative to each other while being separated. In other words, the friction stir welding is performed with the base end portion of the stirring pin F2 exposed. Then, the joining rotary tool F is relatively moved along the abutting portion J31 in a state where the jacket main body 302, the sealing body 303 and the auxiliary member 330 are in contact with the stirring pin F2.

In this embodiment, the traveling direction of the joining rotary tool F is set so that the auxiliary member 330 is positioned on the right side of the traveling direction of the joining rotary tool F. The rotation direction and the traveling direction of the joining rotary tool F are not limited to those described above, and may be set as appropriate. For example, the joining rotary tool F may be rotated counterclockwise while the auxiliary member 330 is disposed on the right side in the traveling direction of the joining rotary tool F. Alternatively, the auxiliary member 330 may be arranged on the left side in the traveling direction of the joining rotary tool F, and the joining rotary tool F may be rotated to the left or right. The preferable positional relationship between the auxiliary member 330 and the conditions such as the rotation direction of the joining rotary tool F will be described later.

The insertion depth of the stirring pin F2 may be set so that the stirring pin F2 and the butting portion J31 are in contact with each other. As shown in FIG. 34, when the joining rotary tool F is made to make a round around the sealing body 303 and the plasticizing region W2 is overlapped, the joining rotary tool F is set at the end position Ep2 set on the auxiliary member 330. To leave.

The removal step is a step of removing the auxiliary member 330 from the jacket main body 302 as shown in FIG. The auxiliary member 330 turns up the end of the auxiliary member 330 with the slit 332 (see FIG. 34) as a boundary, and bends the auxiliary member 330 in a direction away from the end surface 311a of the peripheral wall 311 as shown in FIG. Then, the auxiliary member 330 is removed from the peripheral wall portion 311. The liquid cooling jacket 301 is formed by the above manufacturing method.

The liquid cooling jacket 301 is a metal hollow member having a hollow portion. By circulating a heat transport fluid (for example, water) through the hollow portion of the liquid cooling jacket 301, heat exchange can be performed with a heating element (not shown) installed in the jacket main body 302 or the sealing body 303. Moreover, since the liquid cooling jacket 301 which concerns on this embodiment has the several fin 322, it can improve heat exchange efficiency.

According to the method for manufacturing a liquid cooling jacket and the liquid cooling jacket described above, the auxiliary member 330 is disposed in the inner corner, and the auxiliary member 330 is simultaneously frictionally stirred in addition to the jacket main body 302 and the sealing body 303 to thereby join the joint portion. It is possible to prevent metal shortage in (plasticized region W2). Further, since the burr V can be removed together with the auxiliary member 330 by the removing step, the burr V can be easily removed.

Further, in the second friction stirring step, by performing friction stirring with the rotation center axis Fc of the rotation tool F for bonding inclined to the outside of the sealing body 303, the rotation tool F for bonding can be easily placed at the inner corner. Can be inserted. Although the support portion 312 may be omitted, the support portion 312 is provided as in the present embodiment, and the support portion 312 (protruding portion 312b) and the sealing body 303 are joined to each other, so that the liquid cooling jacket 301 is connected. Strength can be increased. Further, since the protruding portion 312b of the support portion 312 is fitted in the concave groove 323 of the sealing body 303 in the butting step, the positioning operation of the sealing body 303 can be easily performed. Moreover, the position shift of the sealing body 303 can be prevented in the first friction stirring step.

Further, in the first friction stirring step, the end position (detachment position) Ep1 of the welding rotary tool F is set on the peripheral wall portion 311 so that a hole for the stirring pin F2 is formed at a position away from the recess 313. Therefore, the water tightness and air tightness of the liquid cooling jacket 301 can be improved.

Further, according to the present embodiment, the burr V is formed on the auxiliary member 330 by the second friction stirring step, but the auxiliary member 330 can be removed together in the removing step. Thereby, the operation | work which removes the burr | flash V can be performed easily. Although the auxiliary member 330 may use a removing device or the like, in the present embodiment, the auxiliary member 330 can be easily removed manually.

Moreover, in this embodiment, since only the stirring pin F2 is brought into contact with the metal member to be joined, the load acting on the friction stirrer can be reduced as compared with the case where the shoulder portion of the rotary tool is brought into contact. Further, since the friction stir is performed in a state where only the stirring pin F2 of the rotating tool for joining F is in contact with the jacket main body 302 and the sealing body 303, the stirring pin F2 can be inserted to a deep position of the butt portion J31. Thereby, the jacket main body 302 and the sealing body 303 can be joined suitably.

In addition, as shown in FIG. 35, in the second friction agitation process according to the present embodiment, the auxiliary member 330 is disposed on the right side in the traveling direction and the rotating tool F for rotation is rotated to the right, so the auxiliary member 330 side is the Re side. . On the other hand, the side opposite to the Re side is the Ad side.

For example, when the rotational speed of the rotating tool F for bonding is slow, the temperature of the plastic fluidized material is likely to rise more on the Ad side than on the Re side of the plasticizing region W2, so that more burrs V are generated on the Ad side. Tend to. On the other hand, for example, when the rotational speed of the bonding rotary tool F is high, the temperature of the plastic fluidized material increases on the Ad side, but there is a tendency that more burrs V are generated on the Re side due to the higher rotational speed.

In this embodiment, since the rotational speed of the joining rotary tool F is set to be high, a burr V is generated on the Re side, that is, the auxiliary member 330 side. That is, in the present embodiment, the rotational speed, the rotational direction, the traveling direction, and the like of the bonding rotary tool F are set so that many burrs V are formed on the auxiliary member 330 side. Thereby, since the burr | flash V formed in the auxiliary member 330 is removed with the auxiliary member 330, the burr | flash removal process can be performed more easily. Moreover, the moving speed (feeding speed) of the joining rotary tool F can be increased by setting the rotational speed of the joining rotary tool F faster. Thereby, a joining cycle can be shortened.

As described above, in the friction stirring step, which side of the traveling direction of the welding rotary tool F the burr V is generated varies depending on the joining conditions. The joining conditions include the rotational speed, rotational direction, traveling direction, moving speed (feed speed) of the rotating tool F for joining, the inclination angle (taper angle) of the stirring pin F2, the jacket body 302, the sealing body 303, and the auxiliary member. It is determined by each element such as 330 materials and the thickness of each member and the combination of these elements. It is preferable to arrange the auxiliary member 330 on the side where the burrs V are generated or on the side where many burrs V are generated, depending on the joining conditions, because the burr removing step can be easily performed.

In addition, since the slit 332 is provided in the auxiliary member 330, the auxiliary member 330 can be easily removed from the slit 332 as a starting point during the removal process.

Further, according to the liquid cooling jacket 301 according to the present embodiment, since the sealing body 303 having a large thickness is used, it is possible to prevent the sealing body 303 from being deformed by frictional heat. Moreover, like the 2nd friction stirring process of this embodiment, the water-tightness and airtightness of the liquid cooling jacket 301 can be improved more by making the start end and terminal end side of the plasticization area | region W2 overlap (overlap). it can.

[Tenth embodiment]
Next, a method for manufacturing the liquid cooling jacket according to the tenth embodiment will be described. In the joining method according to the present embodiment, a preparation process, a butting process, an arranging process, a friction stirring process, and a removing process are performed. As shown in FIG. 38, the tenth embodiment is mainly different from the ninth embodiment in that the auxiliary member 440 is brought into surface contact with the side surface 421c of the sealing body 403. In the description according to the present embodiment, the description will focus on parts that are different from the ninth embodiment.

Since the preparation process is the same as that of the ninth embodiment, description thereof is omitted. The butting process is a process of butting the jacket body 402 and the sealing body 403 in the same manner as in the ninth embodiment to form the butting portion J41. As shown in FIG. 38, an inner corner is formed by the end surface 411 a of the peripheral wall portion 411 and the side surface 421 c of the sealing body 403.

The placement step is a step of placing the auxiliary member 440 in the inner corner. The auxiliary member 440 is a frame-like member having a hollow portion 441 that is rectangular in plan view. The plate thickness of the auxiliary member 440 is appropriately set so that the joining portion does not run out of metal during the second friction stir welding described later. The hollow part 441 has the same shape as the planar shape of the main body part 421. In the arranging step, as shown in FIG. 39, the end surface of the auxiliary member 440 is brought into contact with the end surface 411a of the peripheral wall portion 411, and the inner peripheral surface of the auxiliary member 440 is brought into surface contact with the four side surfaces 421c of the main body portion 421.

The height dimension of the auxiliary member 440 is the same as the height dimension of the portion of the side surface 421c of the main body 421 that is exposed to the outside. In the present embodiment, the entire side surface 421c is covered with the auxiliary member 440, but a part thereof may be covered.

The friction stirring step is a step of friction stir welding the jacket main body 402 and the sealing body 403 using the rotating tool F for bonding as shown in FIGS. 40 and 41. In the friction stirring process according to the present embodiment, a first friction stirring process and a second friction stirring process are performed. Since the first friction stirring step is the same as that of the ninth embodiment, detailed description thereof is omitted.

The second friction stirring step is a step of performing friction stir welding between the peripheral wall portion 411 of the jacket body 402 and the sealing body 403 using the rotating tool F for bonding. First, the stirring pin F2 of the rotating tool F for rotation rotated to the left is inserted into the start position Sp2 set on the end surface 411a of the peripheral wall portion 411, and is relatively moved toward the inner corner. When the stirring pin F2 reaches the inner corner, as shown in FIG. 41, the rotation center axis Fc of the joining rotary tool F is inclined outward. Then, the rotating tool F for bonding is relatively moved over the periphery of the sealing body 403 in the inclined state, and the butt portion J41 is friction stir welded. A plasticized region W2 is formed in the movement locus of the welding rotary tool F.

In the second friction stirring step, only the stirring pin F2 rotated counterclockwise is inserted into the abutting portion J41, and the metal member to be joined and the connecting portion F1 are moved relative to each other while being separated. In other words, the friction stir welding is performed with the base end portion of the stirring pin F2 exposed. Then, the joining rotary tool F is relatively moved along the abutting portion J41 in a state where the jacket main body 402, the sealing body 403, and the auxiliary member 440 are in contact with the stirring pin F2.

In this embodiment, the traveling direction of the joining rotary tool F is set so that the auxiliary member 440 is positioned on the left side in the traveling direction of the joining rotary tool F. Further, the rotational speed of the joining rotary tool F is rotated at such a high speed that burrs V are generated on the Re side. What is necessary is just to set the insertion depth of the stirring pin F2 so that the stirring pin F2 and the butt | matching part J41 may contact. As shown in FIG. 40, when the rotating tool F for welding is made to make a round around the sealing body 403 and the plasticized region W2 is overlapped, it is used for joining at the end position Ep2 set on the end surface 411a of the peripheral wall portion 411. Release the rotary tool F.

The removing step is a step of removing the auxiliary member 440 from the sealing body 403 as shown in FIG. In the removing step, the auxiliary member 440 is bent in a direction away from the side surface 421c of the sealing body 403, and the auxiliary member 440 is removed from the sealing body 403. The liquid cooling jacket 401 is formed by the above process.

According to the joining method according to the present embodiment, the jacket main body 402 and the sealing body 403 are joined, and in addition to the jacket main body 402 and the sealing body 403, the auxiliary member 440 is also simultaneously joined by friction stir welding. It is possible to prevent metal shortage in the portion (plasticization region W2).

Further, according to the present embodiment, the burr V is formed on the auxiliary member 440 by the friction stirring process, but it can be removed together with the auxiliary member 440 in the removing process. Thereby, the operation | work which removes the burr | flash V can be performed easily. Although the auxiliary member 440 may use a removing device or the like, in the present embodiment, the auxiliary member 440 can be easily removed manually. Moreover, in this embodiment, since only the stirring pin F2 is made to contact with a to-be-joined metal member, the load which acts on a friction stirring apparatus can be reduced compared with the case where the shoulder part of a rotary tool is made to contact.

As shown in FIG. 41, in the second friction agitation process according to the present embodiment, the auxiliary member 440 is disposed on the left side in the traveling direction of the welding rotary tool F, and the auxiliary rotating tool F is rotated counterclockwise. The member 440 side is the Re side. In the present embodiment, since the rotational speed of the joining rotary tool F is set to be high, burrs V are generated on the Re side, that is, on the auxiliary member 440 side. That is, in the present embodiment, the rotational speed, the rotational direction, the traveling direction, and the like of the joining rotary tool F are set so that many burrs V are formed on the auxiliary member 440 side. Thereby, since the burr | flash V formed in the auxiliary member 440 is removed with the auxiliary member 440, a burr | flash removal process can be performed more easily. Moreover, the moving speed (feeding speed) of the joining rotary tool F can be increased by setting the rotational speed of the joining rotary tool F faster. Thereby, a joining cycle can be shortened. Moreover, you may arrange | position the auxiliary member 440 in an inner corner so that the side surface 421c of the sealing body 403 may be followed like the arrangement | positioning process of this embodiment.

Although the embodiments of the present invention have been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, in the above-described embodiment, the auxiliary member is arranged on one side of the inner corner, but the auxiliary member may be arranged on both sides of the inner corner. In the removing step in this case, auxiliary members on which burrs are formed are removed on both sides of the plasticized region. That is, in the removing process according to the present invention, the auxiliary member may be removed from at least one of the jacket main body 402 and the sealing body 403.

In the present embodiment, the protruding portion 412b is provided on the support portion 412, but the protruding portion 412b may be omitted and the support portion 412 and the sealing body 403 may be joined. Further, in the present embodiment, the first friction stirring step and the second friction stirring step are performed discontinuously. However, after the first friction stirring step is finished, the welding rotary tool F is not detached and the second friction stirring step is performed as it is. You may perform a friction stirring process. Thereby, a joining cycle can be raised more.

Further, in the present embodiment, the liquid cooling jacket 401 is a rectangular parallelepiped in appearance, but may be a columnar body having a cylindrical shape in appearance and other polygonal sections, for example.

[Eleventh embodiment]
A method for manufacturing a liquid cooling jacket and a liquid cooling jacket according to an eleventh embodiment of the present invention will be described in detail with reference to the drawings. In the manufacturing method of the liquid cooling jacket according to the present embodiment, a preparation process, a polymerization process, an arrangement process, a friction stirring process, and a removal process are performed.

The preparation step is a step of preparing a jacket body 502 and a sealing body 503 as shown in FIG. The jacket main body 502 includes a bottom portion 510, a peripheral wall portion 511, and a support portion 512. The material of the jacket main body 502 may be a metal capable of friction stir, but is formed of a metal capable of friction stir, such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy, and the like. . The jacket main body 502 is a box-shaped member that opens upward. The bottom 510 has a rectangular shape in plan view. The peripheral wall portion 511 rises from the periphery of the bottom portion 510 and has a rectangular frame shape.

The peripheral wall portion 511 includes

wall portions

511A, 511B, 511C, and 511D. The

walls

511A and 511B are opposed to each other and are short sides. The

walls

511C and 511D are opposed to each other and are long sides. A recess 513 is formed inside the jacket body 502.

The support portion 512 rises from the bottom portion 510 and extends from the wall portion 511B of the peripheral wall portion 511. The support portion 512 may be formed away from the peripheral wall portion 511 or may be omitted. The end surface 512 a of the support portion 512 is flush with the end surface 511 a of the peripheral wall portion 511. A projecting portion 512 b is formed on the end surface 512 a of the support portion 512. The protrusion 512b has a columnar shape in the present embodiment. The protruding portion 512b is a portion that is fitted to the sealing body 503.

The sealing body 503 is a metal member that covers the opening of the jacket body 502. The material of the sealing body 503 is not particularly limited, but is formed of the same material as that of the jacket body 502 in the present embodiment. The sealing body 503 is a plate-like member having a rectangular shape in plan view. Three concave grooves 504 are formed on the back surface 503 b of the sealing body 503. The concave groove 504 is formed so that the protruding portion 512b is inserted at a position corresponding to the protruding portion 512b. The hollow portion of the concave groove 504 has a columnar shape in the present embodiment, but may be any shape as long as the protruding portion 512b can be inserted.

The polymerization step is a step of overlapping the jacket main body 502 and the sealing body 503 as shown in FIG. As shown in FIG. 45, in the polymerization process, the sealing body 503 is placed on the end surface 511 a of the peripheral wall portion 511. The end surface 511a of the peripheral wall portion 511 and the back surface 503b of the sealing body 503 are overlapped to form the overlapping portion J51. The overlapping portion J51 is formed over the entire circumference of the sealing body 503. In addition, an inner corner is formed by the end surface 511 a of the peripheral wall portion 511 and the four side surfaces 503 c of the sealing body 503. In the polymerization step, the concave groove 504 of the sealing body 503 is fitted into the protruding portion 512 b of the support portion 512. Thereby, the fitting part J52 is formed.

The placement step is a step of placing the auxiliary member 530 on the jacket body 502 as shown in FIG. The auxiliary member 530 is a plate-like member in which a hollow portion 531 having a rectangular shape in plan view is formed. The plate thickness dimension of the auxiliary member 530 is appropriately set to such an extent that a metal shortage does not occur at the joint in the second friction stirring step described later. The hollow portion 531 has the same shape as the planar shape of the sealing body 503. The material of the auxiliary member 530 is not particularly limited as long as it is a metal capable of friction stir, but in this embodiment, the material is the same as that of the jacket body 502 and the sealing body 503. A slit 532 continuous in the width direction is formed in a part of the auxiliary member 530.

In the arranging step, the auxiliary member 530 is arranged on the end surface 511a of the peripheral wall portion 511 as shown in FIG. Thereby, the end surface 511a is covered with the auxiliary member 530. The inner peripheral edge of the auxiliary member 530 is in surface contact with the side surface 503c of the sealing body 503 or is disposed with a fine gap. In the present embodiment, the entire end surface 511a is covered with the auxiliary member 530, but the size of the auxiliary member 530 may be adjusted so that a part of the end surface 511a is covered.

The friction stir process is a process in which the jacket main body 502 and the sealing body 503 are friction stir welded using the joining rotary tool F. As shown in FIGS. 48 and 49, the joining rotary tool F includes a connecting portion F1 and a stirring pin F2. In the present embodiment, the spiral groove is formed in a counterclockwise direction from the proximal end toward the distal end in order to rotate the joining rotary tool F to the right. Thereby, the quantity of the metal which overflows outside the to-be-joined metal member (the jacket main body 502, the sealing body 503, and the auxiliary member 530) can be reduced. The spiral groove may be omitted.

In the friction stirring step of the present embodiment, a first friction stirring step and a second friction stirring step are performed. The first friction stirring step is a step of joining the support portion 512 and the sealing body 503. As shown in FIG. 48, in the first friction stirring step, the stirring pin F2 of the rotating tool F for bonding rotated to the right is inserted into the start position Sp1 set on the surface 503a of the sealing body 503. The start position Sp1 is set to a position corresponding to the outer edge of the protruding portion 512b.

As shown in FIG. 49, in the first friction stirring step, the stirring pin F2 reaches the protruding portion 512b, or the protruding portion 512b and the concave groove 504 are in contact with the stirring pin F2 only in the sealing body 503. The fitting portion J52 is friction stir welded. A plasticized region W1 is formed in the movement locus of the welding rotary tool F. When the rotating tool F for joining is made to make one or more rounds around the protruding portion 512b, the rotating tool F for joining is detached. The same process is performed for each protrusion 512b (fitting portion J52). At this time, a punch hole of the rotating tool F for bonding is formed on the surface 503a of the sealing body 503. However, the punch hole may be repaired by overlay welding. Alternatively, the joining rotary tool F may be gradually pulled out so as not to form a punched hole.

The second friction stirring step is a step of joining the peripheral wall portion 511 and the sealing body 503. As shown in FIG. 50, first, the agitation pin F2 of the welding rotary tool F rotated to the right is inserted into the start position Sp2 set on the auxiliary member 530, and is relatively moved toward the inner corner. When the stirring pin F2 reaches the inner corner, as shown in FIG. 51, the rotation center axis Fc of the bonding rotary tool F is inclined outward with respect to the sealing body 503. And the superposition | polymerization part J51 is friction-stir-welded by making it relatively move over the circumference | surroundings of the sealing body 503 in the state which inclined the rotation tool F for joining. A plasticized region W2 is formed in the movement locus of the welding rotary tool F.

In the second friction stirring step, only the stirring pin F2 rotated to the right is inserted into the overlapping portion J51, and the bonded metal member and the connecting portion F1 are moved relative to each other while being separated. In other words, the friction stir welding is performed with the base end portion of the stirring pin F2 exposed. And the rotation tool F for joining is relatively moved along the superposition | polymerization part J51 in the state which contacted the jacket main body 502, the sealing body 503, the auxiliary member 530, and the stirring pin F2.

In this embodiment, the traveling direction of the joining rotary tool F is set so that the auxiliary member 530 is positioned on the right side in the traveling direction of the joining rotary tool F. The rotation direction and the traveling direction of the joining rotary tool F are not limited to those described above, and may be set as appropriate. For example, the joining rotary tool F may be rotated counterclockwise while the auxiliary member 530 is disposed on the right side in the traveling direction of the joining rotary tool F. Alternatively, the auxiliary member 530 may be arranged on the left side in the traveling direction of the joining rotary tool F, and the joining rotary tool F may be rotated to the left or right. The preferable positional relationship between the auxiliary member 530 and the conditions such as the rotation direction of the joining rotary tool F will be described later.

The insertion depth of the stirring pin F2 may be set so that the stirring pin F2 and the overlapping portion J51 are in contact with each other. As shown in FIG. 50, when the joining rotary tool F is made to make a round around the sealing body 503 and the plasticizing region W2 is overlapped, the joining rotary tool F is set at the end position Ep2 set in the auxiliary member 530. To leave.

The removing step is a step of removing the auxiliary member 530 from the jacket main body 502, as shown in FIG. The auxiliary member 530 turns up the end of the auxiliary member 530 with the slit 532 (see FIG. 50) as a boundary, and bends the auxiliary member 530 in a direction away from the end surface 511a of the peripheral wall 511 as shown in FIG. Then, the auxiliary member 530 is removed from the peripheral wall portion 511. The liquid cooling jacket 501 is formed by the above manufacturing method.

The liquid cooling jacket 501 is a metal hollow member having a hollow portion. By circulating a heat transport fluid (for example, water) through the hollow portion of the liquid cooling jacket 501, heat exchange can be performed with a heating element (not shown) installed in the jacket body 502 or the sealing body 503.

According to the manufacturing method and the liquid cooling jacket of the liquid cooling jacket described above, the auxiliary member 530 is disposed in the inner corner, and the auxiliary member 530 is simultaneously frictionally stirred in addition to the jacket main body 502 and the sealing body 503 to thereby join the joint portion. It is possible to prevent metal shortage in (plasticized region W2). Further, since the burr V can be removed together with the auxiliary member 530 by the removing step, the burr V can be easily removed.

In the second friction agitation step, the agitation rotating tool F can be easily inserted into the inner corner by performing friction agitation while the rotation center axis Fc of the agitation rotating tool F is inclined outward. . Although the support portion 512 may be omitted, the support portion 512 is provided as in the present embodiment, and the support portion 512 (protruding portion 512b) and the sealing body 503 are joined to each other, so that the liquid cooling jacket 501 Strength can be increased. Further, in the polymerization process, the projecting portion 512b of the support portion 512 is fitted into the concave groove 504 of the sealing body 503, so that the positioning operation of the sealing body 503 can be easily performed. Moreover, the position shift of the sealing body 503 can be prevented in the first friction stirring step.

Moreover, according to this embodiment, the burr | flash V is formed in the auxiliary member 530 by the 2nd friction stirring process, However It can remove with the auxiliary member 530 in a removal process. Although the auxiliary member 530 may use a removing device or the like, in this embodiment, the auxiliary member 530 can be easily removed manually.

Moreover, in this embodiment, since only the stirring pin F2 is brought into contact with the metal member to be joined, the load acting on the friction stirrer can be reduced as compared with the case where the shoulder portion of the rotary tool is brought into contact. In addition, since the friction stir is performed in a state where only the stirring pin F2 of the bonding rotary tool F is in contact with the jacket main body 502 and the sealing body 503, the stirring pin F2 can be inserted to a deep position of the overlapping portion J51. Thereby, the jacket main body 502 and the sealing body 503 can be joined suitably.

Further, as shown in FIG. 51, in the second friction stirring step according to the present embodiment, the auxiliary member 530 is disposed on the right side in the traveling direction and the rotating tool F for rotation is rotated to the right, so that the auxiliary member 530 side is the Re side. . On the other hand, the side opposite to the Re side is the Ad side. For example, when the rotational speed of the rotating tool F for bonding is slow, the temperature of the plastic fluidized material is likely to rise more on the Ad side than on the Re side of the plasticizing region W2, so that more burrs V are generated on the Ad side. Tend to. On the other hand, for example, when the rotational speed of the bonding rotary tool F is high, the temperature of the plastic fluidized material increases on the Ad side, but there is a tendency that more burrs V are generated on the Re side due to the higher rotational speed.

In this embodiment, since the rotational speed of the joining rotary tool F is set to be high, burrs V are generated on the Re side, that is, on the auxiliary member 530 side. That is, in the present embodiment, the rotational speed, the rotational direction, the traveling direction, and the like of the bonding rotary tool F are set so that many burrs V are formed on the auxiliary member 530 side. Thereby, since the burr | flash V formed in the auxiliary member 530 is removed with the auxiliary member 530, a burr | flash removal process can be performed more easily. Moreover, the moving speed (feeding speed) of the joining rotary tool F can be increased by setting the rotational speed of the joining rotary tool F faster. Thereby, a joining cycle can be shortened.

As described above, in the friction stirring step, which side of the traveling direction of the welding rotary tool F the burr V is generated varies depending on the joining conditions. The joining conditions include the rotational speed of the joining rotary tool F, the rotational direction, the traveling direction moving speed (feed speed), the inclination angle (taper angle) of the stirring pin F2, the jacket body 502, the sealing body 503, and the auxiliary member 530. The material, the thickness of each member, etc., and the combination of these elements. It is preferable to arrange the auxiliary member 530 on the side where the burrs V are generated or on the side where many burrs V are generated, depending on the joining conditions, because the burr removing step can be easily performed.

In addition, since the slit 532 is provided in the auxiliary member 530, the auxiliary member 530 can be easily removed from the slit 532 as a starting point in the removal process. Moreover, the water-tightness and airtightness of the liquid cooling jacket 501 can be further improved by overlapping (overlapping) the start end and the end side of the plasticizing region W2 as in the second friction stirring step of the present embodiment. .

[Twelfth embodiment]
Next, a method for manufacturing the liquid cooling jacket according to the twelfth embodiment will be described. In the joining method according to the present embodiment, a preparation process, a polymerization process, an arrangement process, a friction stirring process, and a removal process are performed. As shown in FIG. 54, the twelfth embodiment is mainly different from the eleventh embodiment in that the auxiliary member 540 is in surface contact with the side surface 503c of the sealing body 503. In the description according to the present embodiment, the description will focus on parts that are different from the eleventh embodiment.

Since the preparation process is the same as that of the eleventh embodiment, the description thereof is omitted. A superposition | polymerization process is a process of abutting the jacket main body 502 and the sealing body 503 in the same way as 11th embodiment, and forming the superposition | polymerization part J51. As shown in FIG. 54, an inner corner is formed by the end surface 511a of the peripheral wall portion 511 and the side surface 503c of the sealing body 503.

The placement step is a step of placing the auxiliary member 540 in the inner corner. The auxiliary member 540 is a frame-like member provided with a hollow portion 541 that is rectangular in plan view. The auxiliary member 540 has a slit 542 that is continuous in the height direction. The plate thickness of the auxiliary member 540 is appropriately set so that the joined portion does not run out of metal during the second friction stir welding described later. The hollow part 541 has the same shape as the planar shape of the sealing body 503. In the arranging step, as shown in FIG. 55, the end surface of the auxiliary member 540 is brought into contact with the end surface 511a of the peripheral wall portion 511, and the inner peripheral surface of the auxiliary member 540 is brought into surface contact with the four side surfaces 503c of the sealing body 503. .

The height dimension of the auxiliary member 540 is the same as the height dimension of the side surface 503c of the sealing body 503. In the present embodiment, the entire side surface 503c is covered with the auxiliary member 540, but a part thereof may be covered.

The friction stir step is a step of friction stir welding the jacket main body 502 and the sealing body 503 using the rotating tool F for bonding, as shown in FIGS. In the friction stirring process according to the present embodiment, a first friction stirring process and a second friction stirring process are performed. Since the first friction stirring step is equivalent to the eleventh embodiment, detailed description thereof is omitted.

The second friction stirring step is a step of friction stir welding the peripheral wall portion 511 of the jacket main body 502 and the sealing body 503 using the rotating tool F for bonding. First, the stirring pin F2 of the rotating tool F for welding rotated to the left is inserted into the start position Sp2 set on the end surface 511a of the peripheral wall portion 511, and is relatively moved toward the inner corner. When the stirring pin F2 reaches the inner corner, as shown in FIG. 57, the rotation center axis Fc of the joining rotary tool F is inclined outward. And the superposition | polymerization part J51 is friction-stir-welded by relatively moving the rotary tool F for joining over the circumference | surroundings of the sealing body 503 in the inclined state. A plasticized region W2 is formed in the movement locus of the welding rotary tool F.

In the second friction stirring step, only the stirring pin F2 rotated counterclockwise is inserted into the overlapping portion J51, and the bonded metal member and the connecting portion F1 are moved relative to each other while being separated. In other words, the friction stir welding is performed with the base end portion of the stirring pin F2 exposed. And the rotation tool F for joining is relatively moved along the superposition | polymerization part J51 in the state which contacted the jacket main body 502, the sealing body 503, the auxiliary member 540, and the stirring pin F2.

In this embodiment, the traveling direction of the joining rotary tool F is set so that the auxiliary member 540 is positioned on the left side in the traveling direction of the joining rotary tool F. Further, the rotational speed of the joining rotary tool F is rotated at such a high speed that burrs V are generated on the Re side. What is necessary is just to set the insertion depth of the stirring pin F2 so that the stirring pin F2 and the superposition | polymerization part J51 may contact. As shown in FIG. 56, when the rotating tool F for welding is made to make a round around the sealing body 503 and the plasticized region W2 is overlapped, it is used for joining at the end position Ep2 set on the end surface 511a of the peripheral wall portion 511. Release the rotary tool F.

The removing step is a step of removing the auxiliary member 540 from the sealing body 503 as shown in FIG. In the removing step, the auxiliary member 540 is bent in a direction away from the side surface 503c of the sealing body 503, and the auxiliary member 540 is removed from the sealing body 503. The liquid cooling jacket 501 is formed by the above process.

According to the joining method according to the present embodiment, the jacket body 502 and the sealing body 503 are joined, and in addition to the jacket body 502 and the sealing body 503, the auxiliary member 540 is also joined by friction stir welding at the same time. It is possible to prevent metal shortage in the portion (plasticization region W2).

Further, according to the present embodiment, the burr V is formed on the auxiliary member 540 by the friction stirring process, but it can be removed together with the auxiliary member 540 in the removing process. Thereby, the operation | work which removes the burr | flash V can be performed easily. Although the auxiliary member 540 may use a removing device or the like, in the present embodiment, the auxiliary member 540 can be easily removed manually. Moreover, in this embodiment, since only the stirring pin F2 is made to contact with a to-be-joined metal member, the load which acts on a friction stirring apparatus can be reduced compared with the case where the shoulder part of a rotary tool is made to contact.

As shown in FIG. 57, in the second friction stirring step according to the present embodiment, the auxiliary member 540 is disposed on the left side in the traveling direction of the welding rotary tool F, and the auxiliary rotary tool F is rotated counterclockwise. The member 540 side is the Re side. In the present embodiment, since the rotation speed of the joining rotary tool F is set to be high, a burr V is generated on the Re side, that is, the auxiliary member 540 side. That is, in this embodiment, the rotational speed, the rotational direction, the traveling direction, and the like of the joining rotary tool F are set so that many burrs V are formed on the auxiliary member 540 side. Thereby, since the burr | flash V formed in the auxiliary member 540 is removed with the auxiliary member 540, a burr removal process can be performed more easily. Moreover, the moving speed (feeding speed) of the joining rotary tool F can be increased by setting the rotational speed of the joining rotary tool F faster. Thereby, a joining cycle can be shortened. Moreover, you may arrange | position the auxiliary member 540 in an inner corner so that the side surface 503c of the sealing body 503 may be followed like the arrangement | positioning process of this embodiment.

Although the embodiments of the present invention have been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, in the above-described embodiment, the auxiliary member is arranged on one side of the inner corner, but the auxiliary member may be arranged on both sides of the inner corner. In the removing step in this case, auxiliary members on which burrs are formed are removed on both sides of the plasticized region. That is, in the removing step according to the present invention, the auxiliary member may be removed from at least one of the jacket main body 502 and the sealing body 503.

In the present embodiment, the protrusion 512b is provided on the support 512, but the protrusion 512b may be omitted and the support 512 and the sealing body 503 may be joined. In the present embodiment, the liquid cooling jacket 501 is a rectangular parallelepiped in appearance, but may be a columnar body having a cylindrical shape in appearance and other polygonal sections, for example. A plurality of fins may be provided on the back surface of the sealing body 503. The heat exchange efficiency can be increased by forming the fins.

DESCRIPTION OF SYMBOLS 1 1st metal member 2 2nd metal member 10 Auxiliary member 20 Auxiliary member F Rotating tool for rotation (rotary tool)
F1 connecting part F2 stirring pin J1 butt part J2 butt part V burr W plasticization region

Claims

A joining method for joining the first metal member and the second metal member using a rotary tool equipped with a stirring pin,
A butting step of butting the first metal member and the second metal member into a substantially L-shaped or substantially T-shaped cross section to form a butting portion;
An arrangement step of arranging an auxiliary member so as to make surface contact with the first metal member or the second metal member at an inner corner of the first metal member and the second metal member;
The rotating agitating pin is inserted into the inner corner, and the rotating tool is relatively moved along the inner corner with only the agitating pin in contact with the first metal member, the second metal member and the auxiliary member. A friction stirring step of moving and joining the first metal member, the second metal member, and the auxiliary member.
2. The joining method according to claim 1, further comprising a removing step of removing the auxiliary member on which the burr is formed from the first metal member or the second metal member.
3. The joining method according to claim 2, wherein in the friction stir step, joining conditions are set so that burrs generated in the friction stir welding are formed on the auxiliary member.
A joining method for joining the first metal member and the second metal member using a rotary tool equipped with a stirring pin,
A butting step of butting the first metal member and the second metal member into a substantially L-shaped or substantially T-shaped cross section to form a butting portion;
An arrangement step of disposing an auxiliary member having a substantially L-shaped cross section so as to make surface contact with the first metal member and the second metal member at the inner corners of the first metal member and the second metal member;
The rotating stirring pin is inserted into the inner corner of the auxiliary member, and only the stirring pin is in contact with the first metal member, the second metal member, and the auxiliary member, and the rotation is performed along the inner corner. A friction stirring step of joining the first metal member, the second metal member, and the auxiliary member by relatively moving a tool.
5. A joining step according to claim 4, further comprising a removing step of removing the auxiliary member, which has been divided by the friction stirring step and formed with burrs, from the first metal member and the second metal member. Method.
Using a rotary tool equipped with a stirring pin, a joining method for joining two metal members having different shapes of surfaces to be abutted with each other,
A butting step of butting one metal member and the other metal member to form a butting portion;
An arrangement step of arranging an auxiliary member at an inner corner between the metal members over the circumferential direction of the other metal member;
The rotated stirring pin is inserted into the inner corner, and only the stirring pin is in contact with the metal members and the auxiliary member, and the friction stir of the butted portion is performed over the circumferential direction of the other metal member. A friction stirring step,
And a removing step of removing the auxiliary member from at least one of the one metal member and the other metal member.
The joining method according to claim 6, wherein in the friction stirring step, joining conditions are set so that burrs generated by friction stirring are formed on the auxiliary member.
Each of the metal members has a plate shape,
The joining method according to claim 6 or 7, wherein, in the butting step, a surface of one of the metal members and a back surface of the other metal member are butted together.
One of the metal members has a plate shape,
The other metal member has a cylindrical shape,
The joining method according to claim 6 or 7, wherein, in the butting step, a surface of one of the metal members and an end surface of the other metal member are butted together.
One of the metal members has a plate shape,
The other metal member has a cylindrical shape,
The joining method according to claim 6 or 7, wherein, in the butting step, a surface of one of the metal members and an end surface of the other metal member are butted together.
One of the metal members has a plate shape,
The other metal member has a cylindrical shape,
The joining method according to claim 6 or 7, wherein, in the butting step, a surface of one of the metal members and an end surface of the other metal member are butted together.
A through hole is formed in one of the metal members,
The joining method according to claim 6 or 7, wherein in the butting step, the through hole is covered with the other metal member.
A through hole is formed in one of the metal members,
The joining method according to claim 10, wherein in the abutting step, the through hole and the hollow portion of the other metal member are communicated with each other.
A through hole is formed in one of the metal members,
The joining method according to claim 11, wherein in the abutting step, the through hole and the hollow portion of the other metal member are communicated with each other.
A method for manufacturing a liquid cooling jacket comprising a jacket body having a recess through which a heat transport fluid flows, and a sealing body for sealing an opening of the recess,
While preparing the sealing body, having a bottom portion and a frame-shaped peripheral wall portion rising from the periphery of the bottom portion, a step bottom surface formed at a position one step lower than the end surface of the peripheral wall portion, and from the step bottom surface A preparation step of preparing the jacket main body with a stepped side surface that rises;
A butting step in which the sealing body having a thickness larger than the height dimension of the step side surface is placed on the step bottom surface to form a butt portion in which the step side surface and the side surface of the sealing body are abutted against each other. When,
An arranging step of arranging an auxiliary member at an inner corner constituted by an end surface of the peripheral wall portion and a side surface of the sealing body;
A friction stirring step of inserting a rotary tool having a stirring pin in the inner corner and performing friction stirring on the butt portion in a state where only the stirring pin is in contact with the jacket body, the sealing body and the auxiliary member; ,
Removing the auxiliary member formed with burrs from at least one of the jacket body and the sealing body,
In the friction stirring step, the rotating tool is rotated around the sealing body along the inner corner, and the butt portion is joined.
The method for manufacturing a liquid cooling jacket according to claim 15, wherein, in the friction stirring step, a joining condition is set so that the burr is generated in the auxiliary member.
The method for manufacturing a liquid cooling jacket according to claim 15 or 16, wherein in the friction stirring step, friction stirring is performed in a state where a rotation center axis of the rotary tool is inclined outward.
In the preparation step, a support portion provided with an end surface flush with the step bottom surface and a protruding portion protruding from the support portion are formed on the bottom portion, and a concave groove is formed on the back surface of the sealing body,
In the butting step, the sealing body is placed while inserting the protruding portion into the concave groove,
In the friction agitation step, only the agitation pin of the rotary tool is applied to the fitting part in which the protruding part and the concave groove are fitted together, only the sealing body, or the protruding part and the sealing body. The method for producing a liquid cooling jacket according to claim 15, wherein friction stirring is performed in a contact state.
The support portion extends from the peripheral wall portion,
19. The liquid according to claim 18, wherein, in the friction stirring step, after the friction stir of the fitting portion is performed, the fitting portion is moved as it is to the peripheral wall portion, and the rotary tool is detached on the peripheral wall portion. Manufacturing method for cold jacket.
A method for manufacturing a liquid cooling jacket comprising a jacket body having a recess through which a heat transport fluid flows, and a sealing body for sealing an opening of the recess,
A preparation step of preparing the jacket body having the bottom part and a frame-shaped peripheral wall part rising from the periphery of the bottom part, and the sealing body;
A polymerization step of overlapping the end surface of the peripheral wall portion and the back surface of the sealing body to form a polymerization portion;
An arranging step of arranging an auxiliary member at an inner corner constituted by an end surface of the peripheral wall portion and a side surface of the sealing body;
A friction stirring step of inserting a rotating tool having a stirring pin in the inner corner and performing friction stirring on the overlapping portion in a state where only the stirring pin is in contact with the jacket body, the sealing body, and the auxiliary member; ,
Removing the auxiliary member formed with burrs from at least one of the jacket body and the sealing body,
In the friction stirring step, the liquid cooling jacket manufacturing method is characterized in that the rotating tool is rotated around the sealing body along the inner corner to join the overlapped portion.
21. The method of manufacturing a liquid cooling jacket according to claim 20, wherein in the friction stirring step, a joining condition is set so that the burr is generated in the auxiliary member.
The method for manufacturing a liquid cooling jacket according to claim 20 or 21, wherein, in the friction stirring step, friction stirring is performed in a state where a rotation center axis of the rotary tool is inclined outward.
In the preparation step, a support portion having an end surface flush with the end surface of the peripheral wall portion is erected on the bottom portion, a protrusion is formed on the end surface of the support portion, and a recess is formed on the back surface of the sealing body. Forming grooves,
In the polymerization step, the sealing body is placed so as to cover the end surface of the peripheral wall portion and the end surface of the support portion while inserting the protruding portion into the concave groove,
In the friction stirring step, the rotating tool is brought into contact with only the sealing body or the sealing body and the protruding portion with respect to the fitting portion where the concave groove and the protruding portion are fitted together. The method for producing a liquid-cooled jacket according to claim 20, wherein friction stirring is performed using
24. The liquid according to claim 23, wherein, in the friction stirring step, the rotating tool is moved away from the sealing body after the stirring pin of the rotating tool is relatively moved one or more times along the protruding portion. Manufacturing method for cold jacket.