TWI579085B - The method of manufacturing heat transfer plate and the joining method thereof - Google Patents

Description

Heat transfer plate manufacturing method and joining method

The present invention relates to a method of manufacturing a heat transfer plate and a method of joining.

As is well known, Friction Stir Welding (FSW) is a method of joining a pair of metal members to each other. The friction stir welding causes the rotating rotary tool to move along the fitting portions of the metal members, and the frictional heat of the rotary tool and the metal member causes the metal of the fitting portion to plastically flow, whereby the metal members are solid-bonded to each other. Further, the turning tool generally has a stirring needle (probe) protruding from the lower end surface of the cylindrical shoulder.

For example, Patent Document 1 describes a heat transfer plate formed by joining a base member and a cover plate by friction stir. As shown in Fig. 29(a), the base member 301 has a cover groove 302 and a recess 303 formed in the bottom surface of the cover groove 302. The cover plate 310 is disposed in the cover groove 302 in such a manner as to cover the recess 303. In the invention related to Patent Document 1, the rotating rotary tool N is moved along the fitting portion of the cover groove 302 and the cover plate 310 to perform friction stir welding. The rotary tool N has a shoulder N1 and a stirring needle N2 formed at the lower end surface of the shoulder N1. A plasticized region W is formed on the movement locus of the rotary tool N.

When the friction stir welding is performed as described above, the surface 301A of the base member 301 is curved into a concave shape due to heat shrinkage. Therefore, the invention related to Patent Document 1 discloses a technique of frictionally stirring the back surface 301B of the base member 301 with the rotary tool N as shown in Fig. 29(b). After this process, due to the back Since the surface 301B also undergoes heat shrinkage, the flatness of the heat transfer plate can be improved.

On the one hand, for example, Patent Document 2 reveals that the use of shoulders and the former A rotating tool comprising a stirring needle protruding from a lower end surface of the shoulder is a technique for frictionally agitating and joining the fitting portions of the metal members.

On the other hand, for example, Patent Document 3 discloses that a plate-shaped metal member is made After overlapping each other to form an overlap portion, a technique of inserting a rotary tool from the surface of the metal member disposed on the upper layer to perform friction stir is employed. The friction stir joining associated with Patent Documents 2 and 3 is such that the lower end surface of the shoulder of the rotary tool is pushed into the surface of the metal member to a degree of several millimeters for friction stir.

[Previous Technical Document] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2009-195940

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2008-290092

[Patent Document 3] Japanese Patent Laid-Open Publication No. 2002-79383

As shown in Fig. 29 (a), the invention of Patent Document 1 pushes the lower end surface of the shoulder portion N1 into the surface 301A of the base member 301 to perform friction stir welding. Pushing into the shoulder N1 prevents the plastically fluidized metal from overflowing around the rotating tool N. However, the plastic flow material may flow into the groove 303 due to the large pressing force applied to the base member 301 by the lower end surface of the shoulder portion N1. On the one hand, in order to prevent the plastic flow material from flowing into the groove 303 and set the position of the friction stir, there is a problem that the design flexibility of the heat transfer plate is restricted.

Further, as shown in Fig. 29(b), the back surface 301B of the base member 301 When the turning tool N is moved in the E1 direction, the front side of the lower end surface of the shoulder portion N1 is in contact with the back surface 301B. Further, when the turning tool N is moved in the E2 direction, the rear side of the lower end surface of the shoulder portion N1 is in contact with the back surface 301B. Therefore, there is a problem that the operational performance of the rotary tool N is lowered.

Moreover, the metal members having the inclined surface and the curved surface are fitted to each other At the time, the height of the fitting portion changes. Further, when the plate-like metal members having the inclined surface and the curved surface are overlapped with each other, the height of the overlapping portion changes. In this case, when the friction stir welding is performed with a conventional rotary tool, since the shoulder of the rotary tool comes into contact with the inclined surface or the like, the rotary tool may have a problem of difficulty in moving. Further, when the fitting portion and the overlapping portion formed by the inclined surface are joined, it is difficult to insert the stirring needle at a position deep in the fitting portion, and thus a joint failure may occur.

On the other hand, a table of a metal member having a certain thickness The surface of the other metal member whose surface height is changed is superimposed on the surface to form an overlapping portion, and the case where frictional stirring is performed on the overlapping portion is also considered. In this case, the metal member inserted on the side of the rotary tool, that is, because the surface height of the other metal member is changed, the use of the conventional rotary tool causes difficulty in moving the rotary tool and causes a problem of poor joint. .

Therefore, the heat transfer plate manufacturing method provided by the present invention can be manufactured The flat heat transfer plate, as well as the operation of the rotating tool, and the design of the heat transfer plate are highly elastic.

Moreover, the bonding method provided by the present invention is in a fitting portion or an overlapping portion. When the height of the change is changed, the operability of the rotary tool can be improved and Make sure. Moreover, in the joining method provided by the present invention, when the height of the surface of the metal member on the side where the rotary tool is inserted is changed, the operability of the rotary tool can be improved and the joint can be surely joined.

In order to solve the foregoing problems, the present invention provides a method of manufacturing a heat transfer plate, comprising: a preparation step of inserting a cover plate in a cover groove formed around a groove formed on a surface of a base member, and the aforementioned base member And the surface of the cover plate is convexly fixed to the table; and in the joining step, the rotating tool provided with the stirring needle is provided along the fitting portion of the side wall of the cover groove and the side surface of the cover plate The above-described joining step is performed by inserting the agitating needle into the fitting portion, and performing friction stir in a state in which only the agitating needle is in contact with the base member and the cap plate.

Moreover, the present invention provides a method of manufacturing a heat transfer plate, comprising: a preparation step of inserting a tube for a heat medium into a groove formed in a bottom surface of a lid groove opened on a surface of a base member, and inserting in the cover groove The cover plate is fixed to the table so that the front side of the base member and the cover plate are convex; and the joining step is along the fitting portion of the side wall of the cover groove and the side surface of the cover plate. The rotating tool in which the stirring needle is disposed is relatively moved to perform friction stirring; in the bonding step, the stirring needle is inserted into the fitting portion, and only the stirring needle is in contact with the base member and the cover plate. Friction stir.

According to the method for producing a heat transfer plate, the bonding step is performed in a predetermined state in which the surface of the base member and the cover surface is convex in advance in the preparation step, so that the heat shrinkage by the bonding step can be transmitted. heat The board is flattened. Moreover, since only the agitating needle in the rotating tool is in contact with the base member and the cover plate, even if the surfaces of the base member and the cover plate are curved into a convex shape, as in the conventional manufacturing method, since the shoulder portion does not hit the base member and the cover plate , so the operation performance of the turning tool becomes better.

Again, like the traditional manufacturing method, because the shoulders are not and the base Since the member and the cover plate are in contact, the pressing force to the base member and the cover plate becomes small, and the width of the plasticized region becomes smaller as compared with the conventional manufacturing method. In this way, the rotating tool can approach the groove in a conventional manner to enhance the design flexibility of the heat transfer plate. Moreover, compared with the conventional manufacturing method, the friction between the joined base member and the cover plate and the rotary tool can be reduced, and the load on the friction stirrer can be reduced. In this way, the friction stir welding can be easily performed to a deep position of the fitting portion.

Further, before the foregoing bonding process, it is desirable to perform the dummy The joining step is to falsely join the fitting portion. According to the related manufacturing method, it is possible to prevent the gap generated in the fitting portion at the time of performing the joining step.

Further, in the above-described false joining step, it is desirable to rotate only the aforementioned The agitating needle of the tool is inserted into the fitting portion to perform a false engagement. According to the related manufacturing method, since the same rotating tool can be used in the bonding process and the dummy bonding process, the manufacturing cycle can be shortened.

Further, measuring the change of at least one of the base member and the cover plate In the above-described joining step, it is preferable to perform friction stir while adjusting the insertion depth of the stirring needle in accordance with the amount of deformation.

According to the related manufacturing method, the stirring can be applied to the base member And the depth position of the cover is kept constant.

Moreover, the present invention provides a method of manufacturing a heat transfer plate, comprising: a preparation step of superposing a cover plate on a surface of the base member so as to cover a surface of the base member and covering the surface of the base member, and fixing the surface of the base member and the cover plate to be convex In the joining step, a rotating tool equipped with a stirring needle is inserted from the surface of the cover plate, and the rotating tool is relatively moved along the overlapping portion of the surface of the base member and the back surface of the cover plate. In the bonding step described above, friction stir is performed only in a state where the stirring needle is in contact with both the base member and the cover, or only in contact with the cover.

According to the manufacturing method of the relevant heat transfer plate, in the preparation process Since the surface of the base member and the cover plate is fixed in a convex shape and then the bonding step is performed, the heat transfer plate can be flattened by heat shrinkage in the bonding step. Moreover, since only the agitating needle in the rotating tool is in contact with the cover plate, even if the surface of the cover plate is curved into a convex shape, as in the conventional manufacturing method, since the shoulder does not hit the cover plate, the operation performance of the rotary tool becomes good. .

Also, like the traditional manufacturing method, because the shoulder is not covered with the cover Since the contact pressure is small, the pressing force to the cover plate becomes small, and the width of the plasticized region W becomes smaller than that of the conventional manufacturing method. In this way, the rotating tool can be closer to the groove or recess than the conventional method, improving the design flexibility of the heat transfer plate. Moreover, compared with the conventional manufacturing method, the friction between the joined base member and the cover plate and the rotary tool can be reduced, and the load on the friction stirrer can be reduced. In this way, the friction stir welding can be easily performed to a deep position of the overlap portion.

Further, before the foregoing bonding process, it is desirable to perform the dummy The joining step is to falsely join the overlapping portions. According to the related manufacturing method, it is possible to prevent the gap generated in the overlapping portion when the bonding process is performed.

Further, measuring the change of at least one of the base member and the cover plate In the above-described joining step, it is preferable to perform friction stir while adjusting the insertion depth of the stirring needle in accordance with the amount of deformation. Moreover, in this case, the amount of deformation of the base member can be measured from the back side of the heat transfer plate and converted into the amount of deformation on the surface side of the heat transfer plate.

According to the related manufacturing method, the depth position of the stirring for the base member and the cover can be kept constant.

Further, after the completion of the joining step, it is preferable to further include a burr cutting step for removing the burr generated by the friction stirring of the turning tool. The surface of the heat transfer plate can be flattened according to the relevant manufacturing method.

Moreover, in order to solve the above problems, the present invention provides a method of manufacturing a heat transfer plate, comprising: a deforming step of applying a tensile stress to a surface side of a base member and a cover, and forming the base portion such that the surface side is convex Deformation of the member and the cover plate; a cover groove occluding step of inserting the cover plate into a cover groove formed around the opening of the surface of the base member; and the joining process along the side wall of the cover groove And a fitting portion on a side surface of the cover plate, wherein a rotating tool equipped with a stirring needle is relatively moved to perform friction stirring; and in the bonding step, the stirring needle is inserted into the fitting portion so that only the stirring needle and the base portion are Friction stirring is performed in a state where the member and the cover plate are in contact with each other.

Moreover, the method for producing a heat transfer plate according to the present invention includes a deformation step of applying a tensile stress to the surface side of the base member and the cover, and the base member and the cover are formed such that the surface side is convex. a plate deformation process; a tube for inserting a heat medium into a groove formed in a bottom surface of a cover groove opening on a surface of the base member; a cover insertion process, inserting the cover In the bonding step, the rotating tool provided with the stirring needle is relatively moved to perform friction stir along the fitting portion of the side wall of the cover groove and the side surface of the cover plate, and the bonding process is performed. The agitating needle is inserted into the fitting portion, and friction stir is performed in a state where only the agitating needle is in contact with the base member and the cap plate.

According to the manufacturing method of the relevant heat transfer plate, Since the tensile stress acts on the surface side of the base member and the cover plate, the bonding step is performed after the deformation. Therefore, the heat transfer plate can be flattened by the heat shrinkage generated in the bonding step. Moreover, since only the agitating needle in the rotating tool is in contact with the base member and the cover plate, even if the surfaces of the base member and the cover plate are curved into a convex shape, as in the conventional manufacturing method, since the shoulder portion does not hit the base member and the cover plate , so the operation performance of the turning tool becomes better.

Again, like the traditional manufacturing method, because the shoulders are not and the base Since the member and the cover plate are in contact, the pressing force to the base member and the cover plate becomes small, and the width of the plasticized region becomes smaller as compared with the conventional manufacturing method. In this way, the rotating tool can approach the groove in a conventional manner to enhance the design flexibility of the heat transfer plate. Moreover, compared with the conventional manufacturing method, the friction between the joined base member and the cover plate and the rotary tool can be reduced, and the load on the friction stirrer can be reduced. In this way, the friction stir welding can be easily performed to a deep position of the fitting portion.

Further, before the foregoing bonding process, it is desirable to perform the dummy The joining step is to falsely join the fitting portion. According to the related manufacturing method, it is possible to prevent the gap generated in the fitting portion at the time of performing the joining step.

Further, in the dummy joining step, it is preferable that only the stirring needle of the turning tool is inserted into the fitting portion to perform the false joining. According to the relevant manufacturer In the method, since the same rotating tool can be used in the bonding process and the dummy bonding process, the manufacturing cycle can be shortened.

Further, in measuring the amount of deformation of at least one of the base member and the cover plate, in the present joining step, it is preferable to perform friction stir while adjusting the insertion depth of the stirring needle in accordance with the amount of deformation.

According to the related manufacturing method, the depth position of the stirring for the heat transfer plate can be kept constant.

Moreover, the present invention provides a method of manufacturing a heat transfer plate, comprising: a deformation step of causing a tensile stress to act on a surface side of a base member and a cover, and the base member and the cover such that the surface side is convex a damming step of superposing the cover plate on a surface of the base member so as to cover a groove or a recess that is open on a surface of the base member; and a dummy joining step of overlapping the base member and the cover plate a dummy joint; and, in the joining step, a rotary tool equipped with a stirring needle is inserted from a surface of the cover plate, and the rotating tool is relatively moved along an overlapping portion of a surface of the base member and a back surface of the cover plate; In the bonding step, the friction stirrage of the overlapping portion is performed only in a state where the stirring needle is in contact with both the base member and the cover, or only in contact with the cover.

According to the method for producing a heat transfer plate, the bonding step is performed after the deformation is applied to the surface of the base member and the cover, so that the heat shrinkage by the bonding step can be performed. The heat transfer plate is flattened. Moreover, since only the agitating needle in the rotating tool is in contact with the cover plate, even if the surface of the cover plate is curved into a convex shape, as in the conventional manufacturing method, since the shoulder does not hit the cover plate, the operation performance of the rotary tool becomes good. .

Also, like the traditional manufacturing method, because the shoulder is not covered with the cover With contact, the pressing force to the cover plate becomes small, and the width of the plasticized region becomes smaller than that of the conventional manufacturing method. In this way, the rotating tool can be closer to the groove or recess than the conventional manufacturing method, improving the design flexibility of the heat transfer plate. Moreover, compared with the conventional manufacturing method, the friction between the joined base member and the cover plate and the rotary tool can be reduced, and the load on the friction stirrer can be reduced. In this way, the friction stir welding can be easily performed to a deep position of the overlap portion.

Further, measuring the change of at least one of the base member and the cover plate In the above-described joining step, it is preferable to perform friction stir while adjusting the insertion depth of the stirring needle in accordance with the amount of deformation.

According to the relevant manufacturing method, it is possible to stir the heat transfer plate The depth position remains constant.

Moreover, after the completion of the bonding process described above, it is desirable to further include burrs. The cutting step is performed to remove burrs generated by the above-described rotating tool for friction stir. The surface of the heat transfer plate can be flattened according to the relevant manufacturing method.

Moreover, in order to solve the aforementioned problems, the present invention provides a bonding method, In the fitting step, the metal members whose surface height changes are fitted to each other to form a fitting portion having a height change; and the joining step, in which the stirring needle of the rotating tool is brought into contact with the knitting portion of the rotating tool Friction stirring is performed in the state of the metal member.

Conventionally, when friction stir is applied, the shoulder does not contact the metal member. According to the related joining method, since the shoulder portion does not contact the metal member, the agitating needle can be inserted to a sufficient depth on the one hand, and the height position of the fitting portion can be easily adjusted to easily adjust the relative height position of the rotating tool. Again, even at height Since the changing fitting portion can easily insert the stirring needle into the deep position of the fitting portion, the fitting portion can be surely joined. Further, since the friction stir is performed in a state where only the stirring needle is brought into contact with the metal member, the load acting on the friction stirrer can be reduced. Thereby, it is possible to frictionally stir the deep position of the fitting portion in a state where the friction stirrer does not have a large load.

Further, in the joining step, it is preferable that the stirring is performed on one side. The insertion depth of the fitting portion with respect to the height change is kept relatively constant, and friction stir is performed while being held. In the joining step, the depth of the plasticizing region formed by the friction stir is approximately constant, and the depth of insertion of the fitting portion with respect to the height change is adjusted.

The joint strength of the fitting portion can be made according to the related joining method Keep it constant.

Moreover, the present invention provides a bonding method including: overlapping work a step of superimposing at least a back surface of the other metal member having a height change on the back surface of the metal member having at least a height change on the surface thereof to form an overlapping portion having a height change; and a joining step from the other side The surface of the metal member is inserted into the rotary tool, and the overlapping portion is rubbed in a state where only the stirring pin of the rotating tool contacts either the one of the metal member and the other of the metal members, or only the other metal member. Stir.

Conventionally, when friction stir is applied, the shoulder does not contact the metal member. According to the related joining method, since the shoulder portion does not contact the metal member, the agitating needle can be inserted to a sufficient depth on the one hand, and the height position of the overlapping portion can be adjusted to easily adjust the relative height position of the rotating tool. Moreover, since the agitating needle can be easily inserted into the overlapping portion at the deep position, it is possible to surely The overlapping portions are joined. Further, since the friction stir is performed in a state where only the stirring needle is brought into contact with the metal member, the load acting on the friction stirrer can be reduced. Thereby, it is possible to friction stir the overlapping portion at the deep position without the large load of the friction stirrer.

Moreover, in the joining step, it is preferable to perform friction stir while keeping the insertion depth of the overlapping portion of the stirring for height change approximately constant. Moreover, in the joining step, the depth of insertion of the overlapping portion with respect to the height change is adjusted so that the depth of the plasticized region formed by the friction stir is approximately constant.

According to the related joining method, the joint strength of the fitting portion can be kept constant.

Moreover, a bonding method according to the present invention includes an overlapping step of forming an overlapping portion on a surface of one of the metal members by overlapping the back surface of the other metal member whose surface height is changed, and a bonding step from the other side The surface of the metal member is inserted into the rotary tool, and the overlapping portion is performed in a state in which only the stirring pin of the rotating tool contacts either the one of the metal member and the other of the metal members, or only the other metal member. Friction stir.

Conventionally, when the friction stir is performed, the shoulder does not contact the metal member. According to the related joining method, since the shoulder does not contact the metal member, the stirring can be easily performed even if the surface of the other metal member has a height change. The needle is inserted into the overlap. Thereby, the overlapping portion can be surely joined. Moreover, since the agitating needle can be easily inserted into the overlapping portion at the deep position, the overlapping portion can be surely joined. In addition, since only the stirring pin is in contact with the metal member The friction stir is performed in the state, so that the load acting on the friction stirrer can be reduced. Thereby, it is possible to friction stir the overlapping portion at the deep position without the large load of the friction stirrer.

Further, a spiral groove is engraved on the peripheral surface of the agitating needle. It is to be noted that, in the case where the rotary tool is rotated to the right, the spiral groove is engraved counterclockwise (to the left) from the base end of the agitating needle to the front end; and the rotation tool is rotated to the left. Next, the spiral groove is engraved clockwise (to the right) from the base end to the front end of the agitating needle.

According to the relevant joining method, due to the plastic flow Since the metal material is introduced into the spiral groove and moved on the tip end side of the stirring needle, the amount of metal overflowing the outside of the metal member can be reduced.

According to the method for producing a heat transfer plate according to the present invention, it is possible to manufacture a flat heat transfer plate, to improve the workability of the rotary tool, and to improve the flexibility of the design. Moreover, according to the joining method according to the present invention, in the case where the height of the fitting portion or the overlapping portion is changed, the operability of the turning tool and the sure joining can be improved. Moreover, according to the joining method according to the present invention, the height of the surface of the metal member on the side where the rotary tool is inserted is changed, and the operability and the positive engagement of the rotary tool can be improved.

1‧‧‧heat transfer plate

2‧‧‧Base components

2a‧‧‧ Surface of the base member

2b‧‧‧Back of the base member

3‧‧‧ Cover

3a‧‧‧ Surface of the cover

3c‧‧‧ side of the cover

4‧‧‧Hot media tube

K‧‧ table

K1‧‧‧ substrate

K2‧‧‧ spacer

K3‧‧‧ clamps

10‧‧‧ Groove

11‧‧‧ Cover

11a‧‧‧ underside of the cover

11b‧‧‧ sidewall of the cover

101‧‧‧Metal components

210‧‧‧Metal components

211‧‧‧Metal components

F‧‧‧This joint turning tool (rotating tool)

F1‧‧‧Link Department

F2‧‧‧ stir needle

D‧‧‧Rotary axis

G‧‧‧False joint rotation tool

J1, J10‧‧‧Mate

J21‧‧‧ overlap

J25‧‧‧ overlap

W, W1‧‧‧ plasticized area

Fig. 1(a) is a side view showing the joining rotary tool of the present embodiment, and Fig. 1(b) is a typical cross-sectional view showing a joining form of the joining rotary tool.

Fig. 2(a) is a side view showing the rotary joining rotary tool of the present embodiment, Fig. 2(b) is a typical cross-sectional view showing a joined form of the dummy joining rotary tool.

Fig. 3(a) is an exploded perspective view showing the heat transfer plate according to the first embodiment and the second embodiment of the present invention; and Fig. 3(b) is a side view showing the main portion of Fig. 3(a).

Fig. 4 is a perspective view showing a heat transfer plate according to a first embodiment of the present invention and a second embodiment.

Fig. 5 is a perspective view showing a pseudo joining step in the method of manufacturing a heat transfer plate according to the first embodiment of the present invention and the second embodiment.

Fig. 6(a) is a perspective view showing the table; Fig. 6(b) is a perspective view showing a preparation process in the heat transfer plate manufacturing method relating to the first embodiment and the second embodiment.

Fig. 7(a) is a side view showing a preparation process in the heat transfer plate manufacturing method according to the first embodiment and the second embodiment, and Fig. 7(b) is a cross-sectional view showing the bonding process.

Fig. 8 is a perspective view showing a variation of the heat transfer plate relating to the first embodiment.

Fig. 9 is a perspective view showing a deformation process in the method of manufacturing the heat transfer plate according to the second embodiment.

Fig. 10 is a perspective view showing a first variation related to the second embodiment.

11(a) and 11(b) are perspective views showing a second modification of the second embodiment, wherein Fig. 11(a) shows a modification process, and Fig. 11(b) shows a state after completion of the deformation process.

Fig. 12 is an exploded perspective view showing a heat transfer plate according to a third embodiment of the present invention and a fourth embodiment.

Fig. 13 is a cross-sectional view showing the bonding step in the third embodiment and the fourth embodiment of the present invention.

Fig. 14 is an exploded perspective view showing a heat transfer plate according to a fifth embodiment of the present invention and a sixth embodiment.

Fig. 15(a) is a perspective view showing a pseudo joining step in the heat transfer sheet manufacturing method according to the fifth embodiment and the sixth embodiment, and Fig. 15(b) is a view showing preparation in the method for manufacturing the related heat transfer sheet. A perspective view of the process.

Fig. 16 is a cross-sectional view showing the bonding step in the method of manufacturing the heat transfer plate according to the fifth embodiment and the sixth embodiment.

Figure 17 (a) is an exploded perspective view of a heat transfer plate according to a seventh embodiment of the present invention and an eighth embodiment, and Figure 17 (b) shows a seventh embodiment and an eighth embodiment of the present invention. A cross-sectional view of the bonding process.

Fig. 18(a) is a perspective view showing a metal member of a joining method according to a ninth embodiment of the present invention; and Fig. 18(b) is a perspective view showing a fitting step relating to the ninth embodiment.

Fig. 19 is a perspective view showing a joining step of the ninth embodiment-related joining method, wherein Fig. 19(a) is a perspective view, and Fig. 19(b) is a cross-sectional view taken along line I-I of Fig. 19(a).

Fig. 20(a) is a longitudinal sectional view showing a joining method of a first variation of the ninth embodiment, and Fig. 20(b) is a longitudinal sectional view showing a joining method relating to a second modification of the ninth embodiment. .

Fig. 21 is a longitudinal sectional view showing a joining method relating to a third modification of the ninth embodiment.

Fig. 22 is a perspective view showing a joining method relating to the tenth embodiment of the present invention.

Fig. 23 is a longitudinal sectional view showing a joining method relating to the tenth embodiment.

Fig. 24(a) is a longitudinal sectional view showing a joining method relating to a first modification of the tenth embodiment, and Fig. 24(b) is a longitudinal sectional view showing a joining method relating to a second modification of the tenth embodiment. Figure.

Fig. 25(a) is a longitudinal sectional view showing a metal member according to a third modification of the tenth embodiment, and Fig. 25(b) is a longitudinal sectional view showing a joining method relating to a third modification of the tenth embodiment. Figure.

Fig. 26 is a longitudinal sectional view showing a joining method relating to a fourth modification of the tenth embodiment.

Fig. 27 is a longitudinal sectional view showing a joining method relating to a fifth modification of the tenth embodiment.

Fig. 28 is a longitudinal sectional view showing a joining method relating to the eleventh embodiment of the present invention.

Fig. 29 (a) is a cross-sectional view showing a conventional heat transfer plate manufacturing method, and Fig. 29 (b) is a longitudinal sectional view thereof.

[First embodiment]

The heat transfer plate and the heat transfer plate manufacturing method according to the first embodiment of the present invention will be described in detail with reference to the drawings. First, the joining rotary tool (standard joining rotary tool) and the false joining rotary tool (temporary joining rotary tool) used in the present embodiment will be described.

As shown in Fig. 1(a), the joining rotary tool F is composed of a coupling portion F1 and a stirring needle F2. The joining rotary tool F corresponds to the "rotating tool" of the patent application. The joining rotary tool F is, for example, a tool steel form. The joint portion F1 is a portion that is connected to the rotation shaft D of the friction stirrer shown in Fig. 1(b). The joint portion F1 has a cylindrical shape and has spiral holes B and B for screwing in.

The stirring needle F2 is suspended downward from the joint portion F1 and is formed with the joint portion F1. For the coaxial. The agitating needle F2 is tapered toward the distal end away from the joint portion F1. A spiral groove F3 is engraved on the outer circumferential surface of the stirring needle F2. In the present embodiment, since the joining rotary tool F is rotated to the right, the spiral groove F3 is formed counterclockwise (leftward) from the base end toward the tip end. In other words, the trajectory is viewed from the base toward the front end from above, and the spiral groove F3 is formed in a counterclockwise manner.

Further, when the joining rotary tool F is rotated to the left, it is preferably a screw. The spiral groove F3 is formed clockwise (to the right) from the base end toward the front end. In other words, in this case, the trajectory is viewed from the base toward the front end from above, and the spiral groove F3 is formed in a clockwise manner. The spiral groove F3 is set as described above, and when friction stir is performed, the plastic fluidized metal is guided to the front end of the stirring needle F2 by the spiral groove F3. Thereby, the amount of metal overflowing to the outside of the joined metal member (such as the base member 2 and the cover plate 3 described later) can be largely reduced.

As shown in Fig. 1(b), use the joining rotary tool F to perform the friction. When the stirring is performed, only the rotating stirring pin F2 is inserted into the joined metal member, and the joined metal member and the connecting portion F1 are separated from each other to move the stirring needle F2. In other words, the friction stir welding is performed in a state where the base end portion of the stirring needle F2 is exposed. On the movement locus of the joining rotary tool F, the frictionally stirred metal is hardened to form a plasticized region W.

False joint rotation tool G, as shown in Fig. 2(a), by shoulder G1 It is composed of a stirring needle G2. False joint rotation tool G, for example, tool steel to make. As shown in Fig. 2(b), the shoulder portion G1 is a portion that is coupled to the rotary shaft D of the friction stirrer, and is a portion for suppressing the plastic fluidized metal. The shoulder G1 has a cylindrical shape. The lower end surface of the shoulder G1 is concave to prevent the fluidized metal from flowing out to the outside.

The stirring needle G2 is lowered from the shoulder G1 and becomes a total of the shoulder G1. axis. The portion of the stirring needle G2 that is away from the shoulder G1 is tapered. A spiral groove G3 is engraved on the outer circumferential surface of the stirring needle G2.

As shown in Fig. 2(b), the dummy engagement tool G is used to execute the motor. When the friction stir welding is performed, the rotating needle G2 and the lower end surface of the shoulder G1 are inserted into the metal member to be joined, and the stirring needle G2 is moved. On the movement locus of the dummy joining rotary tool G, the metal subjected to friction stir hardens to form the plasticized region W1.

Next, the heat transfer plate of this embodiment will be described. As shown in Fig. 3(a), the heat transfer plate 1 according to this embodiment is mainly composed of a base member 2 and a cover 3. The base member 2 is a flat plate member. The base member 2 is formed with a groove 10 and a cover groove 11. The material of the base member 2 is not particularly limited as long as friction stir can be applied. However, in the present embodiment, an aluminum alloy is exemplified.

The groove 10 is formed on the surface 2a of the base member 2, and the plane is considered to be a meandering shape. As shown in Fig. 3(b), the recess 10 is provided on the bottom surface 11a of the cover groove 11. In this embodiment, the groove 10 has a rectangular cross section, but may be a cross section of another shape. The opening of the groove 10 is provided on the side of the surface 2a of the base member 2. The planar shape of the recess 10 can be appropriately designed in accordance with the needs of the application.

The cover groove 11 has a width larger than the groove 10, and is continuously formed on the groove 10 on the side of the surface 2a. The cover groove 11 presents a rectangular cross section, and the opening is on the surface 2a side.

The cover plate 3 is a flat plate-like member to be inserted into the cover groove 11. Cover In the present embodiment, it is formed of an aluminum alloy of the same material as the base member 2. The cover plate 3 and the hollow portion of the cover groove 11 have substantially the same shape so as to be insertable into the cover groove 11.

As shown in Figs. 3 and 4, the side walls 11b, 11b of the cover groove 11 are respectively fitted. The fitting portions J1 and J1 are formed on the side faces 3c and 3c of the cover plate 3. The fitting portions J1 and J1 are joined by friction stir welding over the entire length in the depth direction. The space surrounded by the groove 10 of the heat transfer plate 1 and the back surface 3b of the cover plate 3 serves as a fluid flow path.

Next, the manufacturing method of the heat transfer plate related to the first embodiment will be described. law. The manufacturing method of the heat transfer plate needs to perform a preparation process, this joining process, and a burr cutting process.

Insertion process, false engagement process, and fixing are performed in the preparation process Process. As shown in Fig. 3, in the insertion step, the cover 3 is inserted into the cover groove 11 of the base member 2, and the side walls 11b and 11b of the cover groove 11 and the side faces 3c and 3c of the cover 3 are fitted, respectively. Thereby, as shown in Fig. 5, the fitting portions J1, J1 are formed. The surface 3a of the cover plate 3 and the surface 2a of the base member 2 are flush.

The dummy joining process performs a false engagement of the base member 2 and the cover plate 3. Such as As shown in Fig. 5, in the dummy joining step, the fitting portions J1 and J1 are friction stir welded using the dummy joining rotary tool G. The plasticized region W1 is formed on the movement locus of the dummy bonding rotary tool G. The dummy engagement can be performed continuously or intermittently as shown in Fig. 5. Since the dummy joining rotary tool G is a small device, the amount of thermal deformation of the base member 2 and the cover plate 3 in the false engagement becomes small.

As shown in Fig. 6, the fixing process will be the base member 2 after the false joint And the cover plate 3 is fixed to the table K. As shown in Fig. 6(a), the table K is composed of a substrate K1 having a flat outer surface, a spacer K2 disposed at the center of the substrate K1, and four clamps K3 respectively formed at four corners of the substrate K1. . The spacer K2 is cylindrical in the present state. The height of the spacer K2 can be appropriately set in accordance with conditions such as the amount of heat input in the bonding step.

As shown in Fig. 6(b), the fixing process is to bend the surface 2a side into a convex In a manner, the base member 2 and the cover plate 3 which are falsely joined are placed on the spacer K2, and the four corners are fixed by the clamp K3. In this way, as shown in Fig. 7(a), the surfaces 2a and 3a of the base member 2 and the cover plate 3 are in a state of tensile stress.

As shown in Fig. 7(b), the joining process uses the joining rotary worker. The friction stir joining is performed on the fitting portions J1 and J1 with F. In this bonding step, the friction stir welding is performed in accordance with the plasticized region W1 and the fitting portion J1 which are formed by the dummy joining step. When the joining rotary tool F is inserted in the joining step, it is preferable that the leading end of the joining rotary tool F can reach the bottom surface 11a of the lid groove 11.

Since the length of the stirring pin F2 is larger than the depth of the cover groove 11, even if it is stirred The tip end of the needle F2 reaches the bottom surface 11a of the lid groove 11, and the joint portion F1 does not come into contact with the base member 2 and the lid 3. That is, in the joining step, the lower end surface of the coupling portion F1 does not come into contact with the surfaces 2a and 3a of the base member 2 and the lid 3. The plasticized region W is formed on the movement locus of the joining rotary tool F. Further, in the present embodiment, the distance between the fitting portion J1 and the recess 10 is desirably set so that the plastic flowing material does not flow into the recess 10 when the joining step is performed.

In addition, before the present joining process, the base fixed to the table K is measured. The amount of deformation of the member member 2 in the height direction is preferably in the present joining step. In accordance with the amount of deformation described above, friction stir is performed while adjusting the insertion depth of the stirring needle F2. That is, along the curved surfaces of the surfaces 2a and 3a of the base member 2 and the cover plate 3, the movement trajectory of the joining rotary tool F is curved. In this way, the depth and width of the plasticized region W can be kept constant.

Also, the base member 2 can be measured using a conventional height detecting device And the amount of deformation of the cover plate 3. Further, for example, there is a detecting device for detecting the height from at least one of the surface Ka of the table K to the surface 2a of the base member 2 and the surface 3a of the cover member 3, and the base member can be detected while using the friction stirrer device provided with the above-described detecting device. 2 or the deformation amount of the cover plate 3 is performed in this joining process.

After the joining process is completed, the base member 2 and the cover 3 are removed from the clamp K3 detached and stood still. Since the plasticized region W formed in the joining step is thermally contracted, the base member 2 and the lid member 3 are deformed in a direction in which the surfaces 2a and 3a are concave. As a result, the base member 2 and the cover 3 become flat.

The burr removal process is performed at the base after removing the bonding process The step of burrs on the member 2 and the cover plate 3. In the above manner, the heat transfer plate 1 as shown in Fig. 4 is completed.

Manufacture of heat transfer plates according to the embodiment described above In the preparation step, the bonding process is performed in a fixed state in which the surfaces 2a and 3a of the base member 2 and the lid 3 are convex in advance. Therefore, the heat transfer plate 1 can be flattened by heat shrinkage in the bonding step. Chemical.

Moreover, only the stirring needle F2 in the joining rotary tool F will be combined with the base. Since the member 2 and the cover 3 are in contact with each other, even if the surfaces 2a and 3a of the base member 2 and the cover 3 are curved in a convex shape, the joint portion F1 does not come into contact with the base member 2 and the cover 3, and the joint turning tool F is The operability will be better.

Further, since the joint portion F1 of the joining rotary tool F has no base Since the surfaces 2a and 3a of the member member 2 and the cover member 3 are in contact with each other, the pressing force to the base member 2 and the cover member 3 becomes small, and the width of the plasticized region W becomes smaller than that of the conventional manufacturing method. In this way, the joining rotary tool F can approach the groove 10 in a conventional manner to enhance the design flexibility of the heat transfer plate. Moreover, compared with the conventional manufacturing method, the friction between the joined base member 2 and the cover plate 3 and the present joining rotary tool F can be reduced, and the load on the friction stirrer can be reduced. In this way, the friction stir welding can be easily performed to the deep position of the fitting portion J1. In addition, it is not necessary to perform friction stir in the entire range in the depth direction of the fitting portion J1. However, the entire range in the depth direction of the fitting portion J1 is friction stir, and the watertightness and airtightness of the heat transfer plate 1 can be improved.

Moreover, since the dummy joining process is performed, the joint worker is executed. At the time of the order, the gap between the base member 2 and the cover 3 can be prevented. Moreover, since the burr removal process is performed, the heat transfer plate 1 can be beautifully modified.

In addition, before the bonding process, the configuration standard can also be performed. Identify the material identification process of the material. The specific illustration is omitted, and one or a plurality of marking materials are provided on the side surface of the base member 2 in the marking material disposing step. In the present joining step, the friction stir welding can be performed by setting the start position and the end position on the marker material. After the bonding process is completed, the marking material can be removed from the base member 2. Since the marker material is used, it is possible to prevent the through hole from remaining in the heat transfer plate 1 and to beautifully modify the side surface of the heat transfer plate 1. Moreover, the workability of this joining process can be improved.

Moreover, in this embodiment, although it is the reaction base member 2 and the cover The amount of deformation of 3, and the height of the joining rotary tool F relative to the table K is changed. However, the bonding process may be performed by keeping the height of the joining rotary tool F constant with respect to the table K.

Further, the substrate K1 and the spacer K2 of the table K may be integrated. Further, an upward convex curved surface may be formed on the surface of the substrate K1 in place of the spacer K2. That is, as long as the structure of the table K is maintained, the base member 2 and the cover 3 can be kept convex upward.

Moreover, in the pseudo-joining process, although the present embodiment uses the dummy connection The turning tool G is used in combination, but it is also possible to perform the false joining using the joining turning tool F. In this case, only the tip end of the stirring needle F2 of the joining rotary tool F is inserted into the fitting portion J1 to perform friction stirring. When the dummy joining is performed by the joining rotary tool F, since it is not necessary to replace the turning tool, the manufacturing cycle can be shortened.

Further, as shown in Fig. 6(b), the fixing process of this embodiment is such that The surfaces 2a, 3a of the base member 2 and the cover 3 are bent to be approximately spherical. In other words, in the fixing step, both of the side edges 2c and 2c facing the base member 2 and the sides 2d and 2d facing the other side are curved convexly upward, but the invention is not limited thereto. For example, the base member 2 can be held in a straight line with respect to one of the sides 2c, 2c, and the base member 2 can be bent upward to the other side 2d, 2d. Alternatively, the base member 2 may be held in a straight line toward the other side 2d, 2d, and the base member 2 may be curved to be convex upward toward the one side 2c, 2c.

Moreover, after the bonding process, the groove formed by friction stir is changed. In the large case, it can be repaired by surfacing in the tank. Alternatively, a cover member is disposed in the groove, and the cover member and the base member 2 are joined by friction stir or the like to be repaired.

[variation]

Next, a method of manufacturing the heat transfer plate according to the first embodiment will be described Variations. As shown in Fig. 8, in this modification, the shapes of the base member 2A and the cover 3A are different from those of the first embodiment. The base member 2 and the cover plate 3 according to the first embodiment are flat members before the insertion step. In the modification, the surfaces 2a and 3a of the base member 2A and the cover 3A are changed in a convex shape before the insertion step.

In this modification, the base member 2A and the cover 3A which are convex on the surface 2a, 3a side are formed by die casting. The curvature of the base member 2A and the lid member 3A can be appropriately set in response to conditions such as the amount of heat input in the joining step. In the scope of the patent application, the "surface side of the base member and the cover plate is convex" includes: as in the foregoing embodiment, the base member 2 and the cover plate 3 are convex, and the tensile stress is continuously applied to the surfaces 2a, 3a. In addition, as in this modification, the base member 2 and the cover plate 3 are convex, but the surface 2a, 3a does not have a tensile stress to continue to act.

In the method for producing a heat transfer plate according to a variation, a preparation step, a bonding step, and a burr removal step are performed. These processes are substantially the same as those of the first embodiment, and thus detailed description thereof will be omitted herein.

According to this modification, substantially the same effects as those of the first embodiment can be obtained. Moreover, since the base member 2A and the cover 3A are deformed in advance into a convex shape, the fixing process of clamping the base member can be easily performed. Further, although the modified example uses die casting to prepare the base member 2A and the cover 3A, it is also possible to deform the flat member to a desired curvature after forming a flat member.

[Second embodiment]

A method of manufacturing a heat transfer plate and a heat transfer plate according to a second embodiment of the present invention will be described in detail with reference to the drawings. In the second embodiment, The heat transfer plate 1 which is the same as the first embodiment shown in Figs. 3 and 4 is formed.

Next, a method of manufacturing the heat transfer plate according to the second embodiment will be described. In the method of manufacturing the heat transfer plate according to the second embodiment, the preparation step, the bonding step, and the burr removal step are performed.

The preparation step is an insertion process, a dummy bonding process, a deformation process, and a fixing process. Performing the deformation process in the second embodiment is the main difference from the foregoing first embodiment. The insertion process and the dummy joining process are the same as in the first embodiment.

In the deforming step, the base member 2 and the cover plate 3 which have been subjected to the false joining are deformed into a convex shape on the surfaces 2a and 3a. As shown in Fig. 9, in the present embodiment, a deformation process is performed using a stamper M. The stamper M is composed of a lower mold M1 and an upper mold M2. The lower mold M1 is formed larger than the base member 2. In the present embodiment, the upper surface of the lower mold M1 is a concave spherical surface. The upper mold M2 is formed larger than the base member 2. In the present embodiment, the lower surface of the upper mold M2 is a convex spherical surface.

In the deformation step, the base member 2 and the cover plate 3 that have been subjected to the false engagement are placed on the lower mold M1, and then the upper mold M2 is lowered to deform the base member 2 and the cover plate 3. In this manner, the tensile stress acts on the surfaces 2a and 3a of the base member 2 and the cover plate 3, and the surfaces 2a and 3a are plastically deformed into a convex shape.

As shown in Fig. 6, in the fixing step, the base structure 2 and the cover 3 which have been deformed by the deformation step are fixed to the table K. As shown in Fig. 6(b), in the fixing step, the base member 2 and the cover 3 which have been deformed by the deformation step are placed on the spacer K2, and the four corners are fixed by the clamp K3. As shown in Fig. 7(a), the surfaces 2a and 3a of the base member 2 and the cover 3 are arranged in a convex shape by a fixing step.

As shown in Fig. 7(b), the joining process is performed using the joint rotation. The tool F performs a friction stir welding process on the fitting portions J1 and J1. This joining step is substantially the same as the first embodiment described above.

The burr removal step is a step of removing the burrs generated in the base member 2 and the cover 3 after the bonding step. As described above, the heat transfer plate 1 as shown in Fig. 4 is completed.

According to the method for manufacturing a heat transfer plate according to the embodiment described above, the tensile stress acts on the surfaces 2a and 3a of the base member 2 and the cover 3, and the surfaces 2a and 3a are plastically deformed into a convex shape and then fixed. In the table K, the bonding process is performed in a state in which the surfaces 2a and 3a are convex, and the heat transfer plate 1 can be flattened by heat shrinkage generated in the bonding process. That is, according to the present embodiment, substantially the same effects as those of the first embodiment can be achieved.

Further, in the present embodiment, after the dummy joining step, the deformation step is not limited. Before the insertion process, the base member 2 and the cover 3 may be subjected to a deformation process, and then the insertion process, the dummy bonding process, and the fixing process may be sequentially performed.

Further, as shown in Fig. 6, the deformation step of this embodiment bends the surfaces 2a, 3a of the base member 2 and the cover 3 into a nearly spherical surface. In other words, in the deformation step, the base member 2 faces the one side 2c, 2c and the other side 2d, 2d, both of which are curved downward, but are not limited thereto. For example, when the lower mold M1 whose upper surface is a concave cylindrical surface and the upper mold M2 whose lower surface is a convex cylindrical surface are used, the opposite sides 2c, 2c of the base member 2 can be kept straight, and the base member 2 The sides 2d, 2d facing the other side can be bent to be convex downward. Alternatively, the other sides 2d, 2d may be kept in a straight line, and one side 2c, 2c may be curved to be convex downward.

[First variation]

Next, a first modification of the heat transfer plate manufacturing method relating to the second embodiment will be described. As shown in Fig. 10, the deformation process of the first modification is different from the deformation process of the second embodiment. In the first variation, the portion different from the second embodiment is mainly explained.

As shown in Fig. 10, in the deformation step according to the first modification, the base member 2 and the cover 3 are deformed by the pressure device H. The pressure device H mainly includes a gantry H1 having a flat surface, a spacer H2 disposed at four corners of the gantry H1, an auxiliary member H3 disposed at the center of the back surface 2b of the base member 2, and a presser H4.

In the deformation step, the base member 2 and the cover plate 3 which have been subjected to the false engagement are disposed such that the back surface 2b of the base member 2 faces upward, and the auxiliary member H3 is disposed at the center of the back surface 2b. Then, the presser H4 is lowered, and the tensile stress acts on the surfaces 2a and 3a of the base member 2 and the cover 3, and the surfaces 2a and 3a are plastically deformed into a convex shape. In this way, the surfaces 2a, 3a of the base member 2 and the cover plate 3 are deformed into a convex shape.

In the second embodiment described above, the base member 2 and the cover plate 3 are deformed by using the stamper M. However, the pressure device H may be used as in the first modification. The spacer H2 and the auxiliary member H3 can prevent the base member 2 and the cover 3 from being damaged.

[Second variation]

Next, a second modification of the heat transfer plate manufacturing method relating to the second embodiment will be described. As shown in Fig. 11, the deformation process of the second modification is different from the deformation process of the second embodiment. The second modification will be described mainly with a portion different from the second embodiment.

As shown in Fig. 11(a), the deformation step related to the second modification is subjected to friction stir to deform the base member 2 and the cover plate 3. In the deformation step related to the second modification, the back surface 2b of the base member 2 is frictionally stirred by the joining rotary tool F. This friction stir is maintained in a state in which only the stirring pin F2 of the joining rotary tool F is in contact with the base member 2 and the cover plate 3, and the joining rotary tool F is in the same path as the fitting portions J1 and J1. mobile. The insertion depth of the agitating needle F2 is set to be larger than the insertion depth of the agitating needle F2 when the present joining process is performed.

According to the deformation step related to the second modification, the two plasticized regions W are formed by the friction stir of the joining rotary tool F. As a result, as shown in Fig. 11(b), heat shrinkage occurs, and the back surface 2b side of the base member 2 is concave, and the surfaces 2a and 3a of the base member 2 and the cover 3 are deformed into a convex shape. The fixing step and the bonding step are performed in the same manner as in the second embodiment.

In the second embodiment described above, the base member 2 and the cover plate 3 are deformed by using the stamper M. However, as in the second modification, the heat can be deformed by frictional agitation. In the second modification, since the same joining rotary tool F is used in the deforming step and the joining step, the working time and complexity can be reduced.

In addition, the movement locus of the joining rotary tool F in the deformation step according to the second modification is not limited to the above-described trajectory, and can be appropriately designed in response to the movement of the joining rotary tool F in the joining step. Further, in the deformation step, the type of the rotary tool can be appropriately designed, and the generated heat shrinkage can cause the base member 2 and the cover plate 3 to be concave.

At this time, it is ideal to heat the friction stir in the deformation process. The amount is set to be larger than the amount of heat input by friction stir in the joining step. As shown in Fig. 7(b), in the joining step, the four corners of the base member 2 and the portions other than the center are separated from the table K, so that the heat generated in the joining process becomes difficult from the table. K heats to the outside. Therefore, when the amount of heat input during the joining step is set to be smaller than the amount of heat input during the deformation step, the balance of heat shrinkage can be obtained, and the flattening of the heat transfer plate can be facilitated.

Further, although the specific drawings are omitted, the deformation process of the second embodiment may be performed by deforming the surfaces 2a and 3a of the base member 2 and the cover 3 into a convex shape by another method. For example, the back surface 2b of the base member 2 can be tapped using a tool such as a hammer to deform it. Further, the base member 2 and the cover 3 may be deformed by rolling deformation caused by a plurality of cylindrical tubes or auxiliary tools.

[Third embodiment]

Next, a method of manufacturing the heat transfer plate and the heat transfer plate according to the third embodiment of the present invention will be described. As shown in Fig. 12, the heat transfer plate 1B relating to the third embodiment uses the heat medium tube 4, which is different from the first embodiment. The heat transfer plate 1B is composed of a base member 2, a cover plate 3, and a heat medium tube 4.

The base member 2 has a groove 10 and a cover groove 11. The bottom surface of the groove 10 is a curved surface that is in surface contact with the heat medium tube 4. Further, the width and height of the groove 10 are approximately equal to the diameter of the heat medium tube 4. The heat medium tube 4 is a hollow tube for inserting the groove 10. The heat medium tube 4 is a member that internally circulates a heat medium.

In the method of manufacturing a heat transfer plate according to the third embodiment, a preparation step, a bonding step, and a burr removal step are performed. The heat transfer plate manufacturing method according to the third embodiment is substantially the same as the first embodiment except for the step of inserting the heat medium tube 4 in the groove 10 in the preparation step. According to the third embodiment According to the related heat transfer plate manufacturing method, the heat transfer plate having the heat medium tube 4 can be manufactured, and substantially the same effects as those of the first embodiment can be obtained.

Further, in the third embodiment, as in the variation of the first embodiment described above, the base member 2, the cover plate 3, and the heat medium tube 4 may be previously formed into a convex shape before the insertion process.

Further, as shown in Fig. 13, in the present joining step of the heat transfer sheet manufacturing method according to the third embodiment, the plastic flowing material can flow into the gap portion Q around the heat medium tube 4. Since the plastic flow material flows into the gap portion Q surrounded by the cover plate 3, the heat medium tube 4, and the groove 10, the watertightness and airtightness of the heat transfer plate can be improved.

[Fourth embodiment]

Next, a method of manufacturing the heat transfer plate and the heat transfer plate according to the fourth embodiment of the present invention will be described. In the fourth embodiment, a heat transfer plate 1B as shown in Fig. 12 is manufactured.

In the method for producing a heat transfer plate according to the fourth embodiment, a preparation step, a bonding step, and a burr removal step are performed. In the preparation step, an insertion step (cover insertion step), a dummy joining step, a deforming step, and a fixing step are performed. The fourth embodiment differs from the third embodiment described above mainly in the progress of the deformation process. The fourth embodiment is mainly described in terms of its differences from the third embodiment.

In the deformation step of the fourth embodiment, the base member 2 and the cover 3 of the tube 4 and the cover plate 3, which are falsely joined and embedded with the heat medium tube, are deformed into a convex shape on the surfaces 2a and 3a. The deformation step, for example, as shown in Fig. 9, is performed using the stamper M described in the second embodiment. Moreover, the deformation process is, for example, as shown in FIG. This is carried out using the pressure device H described in the first modification of the second embodiment. Further, the deformation step is performed, for example, as shown in Fig. 11 by the friction stir described in the second modification of the second embodiment.

Further, in the deformation step of the fourth embodiment, the surfaces 2a and 3a of the base member 2 and the cover 3 may be deformed into a convex shape by another method. For example, the back surface 2b of the base member 2 is tapped and deformed using a tool such as a hammer. Further, the base member 2 and the cover 3 may be deformed by using a plurality of cylindrical tubes or auxiliary tools to cause rolling deformation.

Even in the heat transfer plate according to the fourth embodiment and the method of manufacturing the same, substantially the same effects as those in the third embodiment can be achieved.

[Fifth Embodiment]

Next, a method of manufacturing a heat transfer plate according to a fifth embodiment of the present invention will be described. As shown in Fig. 14, the heat transfer plate manufacturing method according to the fifth embodiment uses the base member 22 and the cover 23 to manufacture a heat transfer plate.

The base member 22 is a flat plate member. A groove 30 is formed on the surface 22a of the base member 22. The opening of the recess 30 is on top, and the planar view is in a meandering shape. The planar shape of the groove 30 can be appropriately designed in response to the use.

The cover plate 23 is a flat plate-like member. In the present embodiment, the cover plate 23 has substantially the same shape as the base member 22, and at least the member covering the entire groove 30 may be used.

The method for producing a heat transfer plate according to the fifth embodiment is a preparation step, a bonding step, and a burr removal step. In the preparation step, the groove clogging step, the false joining step of the dummy joint base member 22 and the lid 23, and the surfaces 22a and 23a of the base member 22 and the lid 23 are fixed on the table K. It is a convex fixing process.

As shown in Fig. 14 and Fig. 15(a), in the groove clogging step, a cover plate 23 is disposed on the surface 22a of the base member 22 to cover the groove 30. In the groove closing step, the surface 22a of the base member 22 and the back surface 23b of the cover 23 are overlapped to form the overlapping portion J2.

As shown in Fig. 15 (a), the dummy joining step is falsely joined by the base member 22 and the lid 23 by welding. The false joint is intermittently or continuously performed along the overlapping portion J2 of the base member 22 and the cover plate 23. Instead of welding, the dummy joining rotary tool G may be used to falsely join the overlapping portion J2.

As shown in Fig. 15(b), in the fixing step, the base member 22 and the cover 23 after the false joining are arranged such that the surfaces 22a and 23a are convex, and the four corners are fixed by the clamp K3. Thereby, the surfaces 22a and 23a of the base member 22 and the cover plate 23 are in a state of being subjected to tensile stress.

As shown in Fig. 16, in the joining step, the joining rotary tool F is inserted from the surface 23a of the cover 23, and the joining rotary tool F is moved on the cover 23 to friction stir the overlapping portion J2. In the present joining step, the joining rotary tool F is inserted, and it is preferable that the front end of the joining rotary tool F reaches the base member 22. A plasticized region W is formed on the movement locus of the joining rotary tool F. The distance between the plasticized region W and the groove 30 is desirably set so that the plastic flowing material does not flow into the groove 30 when the present joining step is performed.

Further, before the joining step, the amount of deformation of the base member 22 and the lid 23 fixed to the table K in the height direction is measured, and in the joining step, it is preferable to adjust the insertion depth of the stirring needle F2 in accordance with the amount of deformation. Friction stir on one side. That is, the movement of the joining rotary tool F is along the cover plate 23 The curved surface of the surface 23a is such that the movement locus of the joining rotary tool F becomes a curve. Thereby, the depth and width of the plasticized region W can be kept constant.

Further, the amount of deformation of the base member 22 and the cover 23 is measured, for example, a detecting device for detecting the height from the table K to the surface 23a of the cover 23, and can be detected by using a friction stirrer equipped with the above-described detecting device. This joining process is performed on the deformation amount of the base member 22 and the cover plate 23. In this embodiment, only the amount of deformation of at least one of the base member 22 and the cover plate 23 can be measured. Further, in the present embodiment, the amount of deformation of the base member 22 can be measured from the back side of the heat transfer plate 21 and converted into the amount of deformation on the surface side of the heat transfer plate 21.

After the completion of the joining process, the base member 22 and the lid 23 are separated from the jaw K3 and allowed to stand. Since the plasticized region W formed in the joining step is thermally contracted, the base member 22 and the lid 23 are deformed in a direction in which the surfaces 22a and 23a are concave. As a result, the base member 22 and the cover 23 become flat.

The burr cutting step is a step of removing burrs on the base member 22 and the lid 23 after the joining step. In the above manner, the heat transfer plate 21 is completed.

According to the method for manufacturing a heat transfer plate according to the present embodiment described above, in the preparation step, the surfaces of the base member 22 and the cover 22 are fixed in a convex state in advance, and the bonding step is performed. The heat transfer plate 21 can be flattened by heat shrinkage generated in the bonding process.

Further, only the agitating needle F2 in the joining rotary tool F is in contact with the surface 23a of the cover plate 23, so that even if the surface 23a of the cover plate 23 is curved in a convex shape, the joint portion F1 does not come into contact with the surface 23a of the cover plate 23. Therefore, the operability of the joining rotary tool F is improved.

Further, since the joint portion F1 of the joining rotary tool F has no cover The surface 23a of the contact 23 is in contact with each other, so that the pressing force to the cover plate 23 becomes small, and the width of the plasticized region W becomes smaller than that of the conventional manufacturing method. In this way, the joining rotary tool F can approach the groove 30 in a conventional manner to enhance the design flexibility of the heat transfer plate. Moreover, compared with the conventional manufacturing method, the friction between the cover plate 23 and the present joining rotary tool F can be reduced, and the load on the friction stirrer can be reduced. In this way, even if the overlapping portion J2 is located at a deep position, the friction stir welding can be easily performed.

Further, since the dummy joining step is performed, the gap between the base member 22 and the lid 23 can be prevented when the joining step is performed. Moreover, since the burr removal process is performed, the heat transfer plate 21 can be beautifully modified.

Further, in the fifth embodiment, as in the modification of the first embodiment, when the base member 22 and the cover 23 are overlapped, the base member 22 and the cover 23 can be deformed into a convex shape in advance.

[Sixth embodiment]

Next, a heat transfer plate according to a sixth embodiment of the present invention and a method of manufacturing the same will be described. The heat transfer plate manufacturing method according to the sixth embodiment is to manufacture the heat transfer plate 21 as shown in Figs.

The heat transfer plate manufacturing method according to the sixth embodiment is a preparation process, a bonding process, and a burr cutting process. The preparation process is performed by a groove closing process, a dummy joining process of the dummy joining base member 22 and the cover 23, a deforming process, and a fixing process. The sixth embodiment is mainly different from the fifth embodiment described above in that the deformation process is performed. The sixth embodiment mainly describes the difference between it and the fifth embodiment.

The sixth embodiment of the deformation process, the base that has been subjected to the false joint The member 22 and the cover plate 23 are formed such that their surfaces 22a and 23a are convex. The deformation step, for example, as shown in Fig. 9, is performed using the stamper M described in the second embodiment. Further, the deformation step, for example, as shown in Fig. 10, is performed using the pressure device H described in the first modification of the second embodiment. Further, the deformation step is performed, for example, as shown in Fig. 11 by the friction stir described in the second modification of the second embodiment.

Further, in the sixth embodiment, the surfaces 22a and 23a of the base member 22 and the cover plate 23 may be deformed into a convex shape by other methods. For example, the back surface 22b of the base member 22 is tapped and deformed using a tool such as a hammer. Further, the base member 22 and the cover 23 may be deformed by rolling deformation using a plurality of cylindrical tubes or auxiliary tools.

Even in the heat transfer plate according to the sixth embodiment and the method of manufacturing the same, substantially the same effects as those in the fifth embodiment can be achieved.

[Seventh embodiment]

Next, a method of manufacturing a heat transfer plate according to a seventh embodiment of the present invention will be described. As shown in Fig. 17, in this embodiment, the shape of the base member 22A is different from that of the fifth embodiment. A concave portion 31 is formed on the surface 22Aa of the base member 22A of this embodiment. The recessed portion 31 is opened upward and becomes a hollow portion that exhibits a rectangular parallelepiped.

In the method for producing a heat transfer plate according to this embodiment, a preparation step, a bonding step, and a burr removal step are performed. Since the preparation process and the burr removal process are substantially the same as those of the fifth embodiment, detailed description thereof will be omitted. As shown in Fig. 17(b), in the joining step, the joining rotary tool F is inserted from the front surface 23a of the cover plate 23, and is surrounded by the circumference of the recessed portion 31 to face the weight. The stack J2 is subjected to friction stirring. Thereby, the heat transfer plate 21A can be manufactured. According to this embodiment, substantially the same effects as those of the fifth embodiment can be obtained.

Further, in the seventh embodiment, as in the modification of the first embodiment, when the base member 22A and the cover 23 are overlapped, the base member 22A and the cover 23 can be deformed into a convex shape in advance.

[Eighth embodiment]

Next, a method of manufacturing a heat transfer plate according to an eighth embodiment of the present invention will be described. The heat transfer plate manufacturing method relating to the eighth embodiment is to manufacture the heat transfer plate 21A as shown in Fig. 17.

The method for producing a heat transfer plate according to the eighth embodiment is a preparation step, a bonding step, and a burr removal step. In the preparation step, the occluding step, the false joining step of the dummy joining base member 22A and the lid 23, the deforming step, and the fixing step are performed. The eighth embodiment is mainly different from the seventh embodiment described above in that the deformation process is performed. The eighth embodiment mainly explains the difference between it and the seventh embodiment.

In the deformation step of the eighth embodiment, the base members 22A and the cover 23 which have been subjected to the false engagement are formed such that the surfaces 22Aa and 23a thereof are convex. The deformation step, for example, as shown in Fig. 9, is performed using the stamper M described in the second embodiment. Further, the deformation step, for example, as shown in Fig. 10, is performed using the pressure device H described in the first modification of the second embodiment. Further, the deformation step is performed, for example, as shown in Fig. 11 by the friction stir described in the second modification of the second embodiment.

Further, in the eighth embodiment, the surfaces 22Aa and 23a of the base member 22A and the cover 23 may be deformed into a convex shape by other methods. For example using a hammer, etc. The tool taps the back surface 22Ab of the base member 22A to deform it. Further, the base member 22A and the cover 23 may be deformed by rolling deformation using a plurality of cylindrical tubes or auxiliary tools.

Even in the heat transfer plate manufacturing method according to the eighth embodiment, substantially the same effects as those in the seventh embodiment can be achieved.

Further, in the fifth embodiment to the eighth embodiment, the distal end of the agitating needle F2 is set to be advanced to reach the base members 22, 22A, but may be set to a position where the base members 22, 22A cannot be reached. That is, it is possible to set the frictional agitation of the overlapping portion J2 so as to be advanced to a position where only the agitating needle F2 and the cap plate 23 are in contact. In this case, the frictional heat generated by the contact of the stirring pin F2 and the cover plate 23 causes the base members 22, 22A and the cover plate 23 to be plastically fluidized, and the overlapping portion J2 is joined.

Further, in the fifth embodiment to the eighth embodiment, the joining rotary tool F is inserted from the front surface 23a of the cover plate 23, but the front surface 22b and the 22Ab of the base members 22 and 22A may be inserted into the joint. The tool F is rotated to friction stir the overlap portion J2. In this case, the setting of the agitating needle F2 may be advanced to a position where both the base members 22, 22A and the cover 23 are in contact, or may be advanced to a position in contact with only the base members 22, 22A for performing. Friction stir.

Further, in the fifth embodiment to the eighth embodiment, although the groove 30 or the recess 31 is exemplified, the base member without the groove 30 or the recess 31 may be used. That is, the base member exhibiting the rectangular parallelepiped and the cover plate exhibiting the rectangular parallelepiped may be joined to manufacture the heat transfer plate.

[Ninth embodiment]

Next, a joining method relating to the ninth embodiment of the present invention will be described. As shown in Fig. 18, in the present embodiment, the fitting portion J10 formed by the two end faces 101a and 101a of the two metal members 101 and 101 is fitted by friction and agitation to complete the joining. The metal member 101 is a member made of metal, and the portions to be fitted have the same shape. Further, the metal members 101, 101 are formed of the same material. The material of the metal member 101 is not particularly limited as long as it can be friction stir. For example, aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy or the like can be suitably selected.

As shown in Fig. 18(a), the metal member 101 is composed of a body portion 102 having a rectangular parallelepiped shape and a convex portion 103 formed in a block shape on the main body portion 102. The surface 103a of the convex portion 103 is located above the surfaces 102a and 102b of the body portion 102. The first surface 103b of the convex portion 103 is inclined, and connects the surface 102a of the body portion 102 and the surface 103a of the convex portion 103. Further, the second surface 103c of the convex portion 103 is inclined, and connects the surface 102b of the main body portion 102 and the surface 103a of the convex portion 103.

In the bonding method according to this embodiment, the fitting step and the bonding step are performed. As shown in Fig. 18(b), the fitting step is a step of fitting the end faces 101a and 101a of the metal members 101 and 101. In the fitting step, the surfaces on which the metal members 101 and 101 are fitted to each other are flush.

As shown in Fig. 18(b), the end faces 101a and 101a are brought into surface contact by the fitting step to form the fitting portion J10. The formed fitting portion J10 has a change in height position. That is, the height (elevation height) of the starting point (insertion position) of the friction stir is used as the reference height, and the fitting portion J10 has a section having a height different from the reference height from the start point to the end point. In the present embodiment, the fitting portion J10 is composed of the first flat portion Ja, the first inclined portion Jb, the second flat portion Je, the second inclined portion Jd, and the third flat portion Je.

As shown in Fig. 19 (a), in the joining step, the joining portion J10 is subjected to friction stir welding using the joining rotary tool F. In the joining step, the stirring needle F2 of the rotating joining rotary tool F is inserted into the end of the first flat portion Ja of the fitting portion J10, and the joining rotary tool F is relatively moved along the fitting portion J10. In the present embodiment, the center axis of rotation of the joining rotary tool F is always in a state of being parallel to the vertical axis to perform friction stir welding. By the joining step, the metal members 101 and 101 around the stirring needle F2 are friction stir and joined. The plasticized region W is formed on the movement locus of the joining rotary tool F.

As shown in Fig. 19(b), in the process related to the embodiment, the depth of the insertion of the agitating needle F2 into the fitting portion J10 is kept relatively constant, and only the state in which the agitating needle F2 and the metal member 101 are in contact with each other is contacted. Perform friction stir. In the joining process according to the present embodiment, the joining rotary tool F is moved up and down with respect to the gantry (the drawing) in which the metal members 101 and 101 are fixed, and friction stir welding is performed.

In this way, the depth Za of the plasticized region W of the first flat portion Ja, the depth Zb of the plasticized region W of the first inclined portion Jb (the depth of the plasticized region W on the line perpendicular to the first surface 103b), and The depth Zc of the plasticized region W of the second flat portion Jc can be approximately equal. The "insertion depth" of the agitating needle F2 is the distance from the surface of the metal member 101 to the tip end of the agitating needle F2 in the central axis of rotation of the joining rotary tool F.

Further, in the joining step according to the embodiment, the joining rotary tool F is moved up and down with respect to the gantry (omitted from the drawing), but the height position of the joining rotary tool F may be fixed, and the gantry may be moved up and down. For friction stir.

According to the joining method according to the embodiment described above, since the metal members 101 and 101 and the shoulder portion are not in contact with each other, the stirring needle F2 can be inserted into a sufficient depth, and the height of the fitting portion J10 can be easily adjusted and adjusted. The relative height position of the joining rotary tool F. Further, even in the fitting portion J10 in which the height position is changed, the agitating needle F2 can be easily inserted into the deep position of the fitting portion J10, so that the fitting portion J10 can be surely joined. That is, even if the fitting portion J10 of the metal members 101, 101 has an upward inclination (upward slope) or a downward inclination (downward slope), the operability of the joining rotary tool F can be improved.

Moreover, since the depth of the plasticized region W can be kept constant, the joint strength of the joint portion can be maintained constant even if the height of the fitting portion J10 changes.

Moreover, since the friction stir is performed in a state where only the stirring pin F2 and the metal members 101 and 101 are in contact with each other, the action load of the friction stirrer can be reduced. Thereby, the friction stirrer does not receive a large load, and therefore the deep position of the fitting portion J10 can be friction stir.

Further, in the height change point or the inclined surface (the first inclined portion Jb and the second inclined portion Jd) of the fitting portion J10, even if the insertion depth of the stirring needle F2 is kept constant, it is difficult to plasticize the region W. The depth of the situation is maintained. In this case, it is desirable to maintain the depth of the plasticized region W approximately constant, and to appropriately adjust the insertion depth of the agitating needle F2 of the joining rotary tool F with respect to the fitting portion J10.

[First variation]

Next, a first modification of the ninth embodiment will be described. Fig. 20(a) is a view showing a fitting portion in a first modification of the joining method relating to the ninth embodiment In the longitudinal cross-sectional view, Fig. 20(b) is a longitudinal sectional view of the fitting portion in the second modification. In the first modification shown in Fig. 20(a), the surface of the metal members 101 and 101 is a curved surface together with the height change of the fitting portion J11, which is different from the ninth embodiment.

In the joining step of the first modification, the step of performing friction stir welding on the fitting portion J11 using the joining rotary tool F is used. In the joining step of the first modification, while the insertion depth of the stirring pin F2 to the fitting portion J11 is kept constant, the agitating needle F2 and the metal members 101 and 101 are only brought into frictional agitation while being in contact with each other.

[Second variation]

In the second variation of the ninth embodiment shown in FIG. 20(b), when the height of the fitting portion J12 changes, the upper tilt (upper slope) and the lower tilt (lower slope) are interactively continuous. It is a difference from the aforementioned ninth embodiment.

The joining step of the second modification is a step of friction stir welding the fitting portion J12 using the joining rotary tool F. In the joining step according to the second modification, on the one hand, the insertion depth of the stirring needle F2 to the fitting portion J12 is kept relatively constant, and on the other hand, only the stirring needle F2 and the metal members 101 and 101 are brought into contact with each other to perform friction stirring.

As in the joining method related to the first variation and the second variation, even in the case where the surface of the metal members 101, 101 is a curved surface, or the case of continuous upper and lower inclination, the ninth embodiment can be achieved. Roughly the same effect.

[Third variation]

Figure 21 is a diagram showing a third variation of the ninth embodiment. A longitudinal section of the joining method. In the third modification, the friction stir is performed in a state where the joining rotary tool F is perpendicular to the joint surface, which is different from the ninth embodiment.

As shown in Fig. 21, in the third modification of the ninth embodiment, when the joining step is performed, the joining rotary tool F is vertically inserted into the joint surface, and friction stir is performed on the one hand. In the joining process of the third modification, the first flat portion Ja, the second flat portion Jc, and the third flat portion Je are the same as the ninth embodiment, and the central and vertical axes of rotation of the joining rotary tool F are The friction stirring process is performed while being kept in parallel. On the other hand, in the first inclined portion Jb and the second inclined portion Jd, the joining rotary tool F is inclined with respect to the vertical axis, so that the central axis of rotation of the joining rotary tool F becomes the vertical first inclined portion Jb and The state of the joint surface (the first surface 103b and the second surface 103c) of the second inclined portion Jd is friction stir.

In the case of the third modification, for example, the joining rotary tool F can be provided on the robot arm having the rotation driving device such as the spindle unit at the tip end to perform friction stirring. With such a friction stirrer, the angle of the central axis of rotation of the joining rotary tool F with respect to the vertical axis can be easily changed. Thereby, even in the case where the height of the fitting portion J10 is changed, the angle of the rotation center axis of the joining rotary tool F with respect to the vertical axis can be changed during the friction stirring, so that the joining rotary tool F can be engaged. The surface is kept in a vertical state, and friction stir is continuously performed.

This third variation can achieve substantially the same effects as the ninth embodiment. Further, since the joining rotary tool F can be vertically inserted into each of the joint faces, even if there is an inclined surface, the friction stir can be reached to reach the depth of the fitting portion J10. Location. Further, in the case where the joint surface is a curved surface, the normal line of the joint surface and the center axis of rotation of the joint turning tool F may be overlapped to perform friction stir.

The above is a description of the ninth embodiment and the first to third variations of the present invention, but it is possible to make appropriate design changes without departing from the scope of the present invention. For example, before the joining process, the friction stir can be performed using a small rotating tool or the joining process can be performed by welding. Thereby, it is possible to prevent a gap from occurring in the fitting portion when the joining process is performed.

Moreover, when performing a joining process, a marker material can be provided in the both ends of a fitting part. On the respective surfaces of the marking material, the start position and the end position of the friction stir can be set. The marking material can be removed after the joining process is completed. Thereby, the workability of the joining process can be improved. Moreover, the side surfaces of the metal members 101 and 101 can be beautifully modified.

[Tenth embodiment]

Next, a joining method relating to the tenth embodiment of the present invention will be described. As shown in Fig. 22, in the present embodiment, the overlapping portion J21 formed by overlapping the metal members 201 and 201 is frictionally stirred to complete the joining. The metal members 201 and 201 are metal plate members and have the same shape.

The metal members 201, 201 are formed of the same material. The material of the metal member 201 is not particularly limited as long as it can be friction stir. However, it can be suitably selected from, for example, aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy or the like.

As shown in FIG. 22, the metal member 201 is composed of a first flat portion 202, an inclined portion 203, and a second flat portion 204. The first flat portion 202, the inclined portion 203, and the second flat portion 204 are all formed to have a certain thickness and any one of them is It is now plate-shaped. The second flat portion 204 is formed at a position higher than the first flat portion 202. The inclined portion 203 connects one end side of the first flat portion 202 and the other end side of the second flat portion 204.

In the present embodiment, the metal members 201 and 201 are formed to have a certain thickness and the heights of the surface 201a and the back surface 201b are changed together. However, at least the surface 201a of the metal member 201 disposed on the lower side and at least the back surface 201b of the metal member 201 disposed on the upper side are provided. The heights of the two are different, and the two can be formed in a surface contact manner.

In the bonding method according to this embodiment, the overlapping step and the bonding step are performed. As shown in Fig. 22, the overlapping step is a step of superposing the back surface 201b of the upper metal member 201 on the surface 201a of the lower metal member 201. In the present embodiment, the surface 201a of the lower metal member 201 and the back surface 201b of the upper metal member 201 have the same shape, so that the surface 201a of the lower metal member 201 and the upper metal member 201 are brought about by the overlapping process. The back surface 201b is in surface contact to form an overlapping portion J21.

The formed overlapping portion J21 (the boundary of the metal members 201 and 201) has a change in height position. That is, the height (elevation) of the starting point (insertion position) of the friction stir is used as the reference height, and a section having a height different from the reference height exists in the overlapping portion J21 from the start point to the end point. In the present embodiment, the overlapping portion J21 is composed of the first flat overlapping portion J22, the inclined overlapping portion J23, and the second flat overlapping portion J24. Further, in the present embodiment, since the upper metal member 201 has the same thickness, the height of the surface Ja of the overlapping portion J21 and the upper metal member 201 also changes.

As shown in Fig. 23, the joining step is a step of performing friction stir welding on the overlapping portion J21 using the joining rotary tool F. In the joining process, from the top The surface 201a of the side metal member 201 is inserted into the stirring pin F2 of the joining rotary tool F that rotates to the right, and the joining rotary tool F is relatively moved on the surface 201a of the upper metal member 201. In the joining step, the metal around the overlapping portion J21 is frictionally stirred to join the metal members 201 and 201. The plasticized region W is formed on the movement locus of the joining rotary tool F. In the joining step, the center axis of rotation of the joining rotary tool F is often kept parallel to the vertical axis, and friction stir is performed.

The insertion depth of the agitating needle F2 can be set such that at least the plasticized region W formed by the frictional agitation can reach the overlapping portion J21. However, in the present embodiment, the front end of the agitating needle F2 is set to contact the metal member 201 of the lower side. degree.

As shown in Fig. 23, in the joining step according to the present embodiment, while the depth at which the stirring needle F2 is inserted into the overlapping portion J21 is kept constant, the friction stir is performed while only the stirring needle F2 is in contact with the metal members 201 and 201. . In the joining step according to the present embodiment, the joining rotary tool F is moved up and down to perform friction stirring with respect to the mount (not shown) of the fixed metal members 201 and 201.

In this way, the depth Za of the plasticized region W of the first flat overlapping portion J22, the depth Zb of the plasticized region W of the inclined overlapping portion J23 (the depth of the plasticized region W on the line perpendicular to the inclined portion 203), and The depth Zc of the plasticized region W of the two-flat overlapping portion J24 can be approximately equal. The "insertion depth" of the agitating needle F2 is the distance from the surface 201a of the metal member 201 to the tip end of the agitating needle F2 on the central axis of rotation of the joining rotary tool F.

Further, in the joining step according to the embodiment, the joining rotary tool F is moved up and down with respect to the gantry (omitted from the drawing), but the height position of the joining rotary tool F may be fixed, and the gantry may be moved up and down. For friction stir mix.

According to the bonding method of the present embodiment described above, since the upper metal member 201 and the shoulder are not in contact, the agitating needle F2 can be inserted to a sufficient depth on the one hand, and the height of the overlapping portion J21 can be easily changed on the one hand. The relative height position of the joining rotary tool F is adjusted. Further, even in the overlapping portion J21 in which the height position is changed, the agitating needle F2 can be easily inserted into the deep position of the overlapping portion J21, so that the overlapping portion J21 can be surely joined. That is, even in the case where the overlapping portion J21 of the metal members 201, 201 has an upward inclination (upward slope) or a downward inclination (downward slope), the operability of the joint-use rotary tool F can be improved.

Moreover, since the depth of the plasticized region W can be maintained constant, the joint strength of the joint portion can be maintained constant even if the height of the overlap portion J21 changes.

Further, since the friction stir is performed in a state where only the stirring pin F2 is in contact with the metal members 201 and 201, the acting load of the friction stirrer can be reduced. Thereby, the friction stirrer does not receive a large load, and therefore the deep position of the overlap portion J21 can be friction stir.

In the joining step, the tip end of the stirring needle F2 is brought into contact with the metal member 201 on the lower side (the tip end of the stirring needle F2 is inserted into the metal member 201 on the lower side) to perform friction stir. Therefore, the overlapping portion J21 can be surely joined.

Further, in the height change point or the inclined surface (inclined overlapping portion J23) of the overlapping portion J21, even if the insertion depth of the stirring needle F2 is kept constant, it may be difficult to maintain the depth of the plasticized region W constant. In this case, it is desirable to maintain the depth of the plasticized region W approximately constant, and to properly adjust the joint. The depth of insertion of the overlapping portion J21 by the stirring pin F2 of the turning tool F.

[First variation]

Next, a first modification of the tenth embodiment will be described. Fig. 24(a) is a longitudinal sectional view showing a joining method relating to a first modification of the tenth embodiment, and Fig. 24(b) is a longitudinal section of a joining method relating to a second modification of the tenth embodiment. Figure. In the first variation of the tenth embodiment shown in Fig. 24(a), the overlapping portion J21 is alternately continuous with the upper inclination (upward slope) and the lower inclination (lower slope), which is the same as the foregoing embodiment. The difference.

The joining step of the first modification of the tenth embodiment is a step of performing friction stir welding on the overlapping portion J21 using the joining rotary tool F. In the joining process according to the first modification, the insertion depth of the agitating needle F2 to the overlapping portion J21 is kept relatively constant, and on the other hand, friction stirring is performed in a state where only the agitating needle F2 and the metal members 201 and 201 are in contact with each other.

[Second variation]

In the second variation of the tenth embodiment shown in Fig. 24(b), when the height of the overlapping portion J21 changes, the metal members 201, 201 are bent in the up and down direction, which is different from the above-described embodiment. Where.

The joining step of the second modification of the tenth embodiment is a step of friction stir welding of the overlapping portion J21 using the joining rotary tool F. In the joining step according to the second modification, on the one hand, the insertion depth of the stirring needle F2 to the overlapping portion J21 is kept relatively constant, and on the other hand, the friction stirring is performed in a state where only the stirring needle F2 and the metal members 201 and 201 are in contact with each other.

As with the joining method related to the first variation and the second variation, even if the surface 201a of the metal member 201 is continuous upwardly inclined and downwardly inclined In the case where the shape or the surface 201a is a curved surface, substantially the same effects as those of the tenth embodiment described above can be achieved.

[Third variation]

In the third variation of the tenth embodiment shown in FIGS. 25(a) and (b), the surface 211a of the metal members 211, 211 on the insertion side of the joining rotary tool F is flat, but the overlapping portion J21 The height change is different from the tenth embodiment.

The metal member 211 on the lower side is a plate-like member formed with different thicknesses. The lower metal member 211 is composed of a thin plate portion 212, a thick plate portion 214 thicker than the thin plate portion 212, and an inclined portion 213 formed between the thin plate portion 212 and the thick plate portion 214. The inclined portion 213 assumes a sectional table shape. The surface of the inclined portion 213 is continuous on the surface of the thin plate portion 212 and the surface of the thick plate portion 214, and is inclined upward from the thin plate portion 212 toward the thick plate portion 214. Thereby, the surface 211a of the lower metal member 211 is formed with a change in height. The back surface 211b of the lower metal member 211 is flat without height change.

The upper metal member 211 and the lower metal member 211 have the same shape. The upper metal member 211 is provided to be point-symmetric with the lower metal member 211. Thereby, the surface 211a of the upper metal member 211 is flat without height change. Moreover, the rear surface 211b of the upper metal member 211 has a height change.

In the overlapping step, the surface 211a of the lower metal member 211 and the back surface 211b of the upper metal member 211 are overlapped. As shown in (b) of Fig. 25, the overlapping portion J21 is formed by an overlapping process. The height position of the formed overlapping portion J21 may vary. That is, the overlapping portion J21 is composed of the first flat overlapping portion J22, the inclined portion J23, and the The second flat overlap portion J24 is formed.

As shown in (b) of FIG. 25, the joining step is a step of performing friction stir welding on the overlapping portion J21 using the joining rotary tool F. In the joining step, the stirring needle F2 of the joining rotary tool F that is rotated rightward is inserted from the surface 211a of the upper metal member 211, and the joining rotary tool F is relatively moved on the surface 211a of the upper metal member 211. In the joining step, the metal around the overlapping portion J21 is frictionally stirred to join the metal members 211 and 211. The plasticized region W is formed on the movement locus of the joining rotary tool F. In the joining step, the center axis of rotation of the joining rotary tool F is often kept parallel to the vertical axis, and friction stir is performed.

In the joining step according to the third modification, the joining rotary tool F is moved up and down to perform friction stirring with respect to the gantry (not shown) that fixes the metal members 211 and 211. The insertion depth of the agitating needle F2 can be set so that at least the plasticized region W formed by the frictional agitation can reach the overlapping portion J21. However, in the present embodiment, the agitating needle F2 is set to vary along the height of the overlapping portion J21. The extent to which the front end contacts the metal member 211 on the lower side.

Further, in the joining step according to the third modification, the joining rotary tool F is moved up and down with respect to the gantry (omitted from the drawing), but the height position of the joining rotary tool F may be fixed, and the gantry may be moved up and down. For friction stir.

As in the third modification, the surface 211a of the upper metal member 211 into which the joining rotary tool F is inserted is flat, so that even in the case where the high portion of the overlapping portion J21 is changed, the tenth embodiment can be obtained. Roughly the same effect. As described above, the joined metal members are disposed on the lower side of the metal member. At least the surface of at least the surface of the metal member disposed on the upper side may be in a surface contact shape.

[Fourth variation]

Fig. 26 is a longitudinal sectional view showing a joining method of a fourth modification of the tenth embodiment. As shown in Fig. 26, in the fourth modification, the agitating needle is only brought into contact with the upper metal member 201, which is different from the tenth embodiment described above. In the joining step of the fourth modification, the insertion depth of the stirring needle F2 is set such that the plasticized region W formed by the friction stirring reaches the lower metal member 201 while the stirring needle is only in contact with the upper metal member 201. .

In the joining step in the fourth modification of the tenth embodiment, the stirring needle F2 is friction stirlable while maintaining the insertion depth of the overlapping portion J21 (the upper metal member 201) whose height is changed. In this case, the frictional heat generated by the friction between the stirring needle F2 and the upper metal member 201 causes the metal members 201 and 201 to plastically flow to join the overlapping portion J21.

Further, in the first to third modifications of the tenth embodiment and the tenth embodiment, as in the fourth modification, the joining rotary tool F may be in a state of only contacting the upper metal member. The joining process is performed.

[Fifth variation]

Fig. 27 is a longitudinal sectional view showing a joining method of a fifth modification of the tenth embodiment. In the fifth modification, the present joining rotary tool F is frictionally agitated in a state where the joint surface is perpendicular to the tenth embodiment.

As shown in Fig. 27, in the overlapping step of the fifth modification, the back surface of the upper metal member 201 is superposed on the surface 211a of the lower metal member 211. The overlap portion J21 is formed at 201b. In the joining step, as in the tenth embodiment, friction stir is performed in the first flat overlapping portion J22 and the second flat overlapping portion J24 in a state where the rotation central axis and the vertical axis of the joining rotary tool F are parallel. On the other hand, the joining rotary tool F is inclined to the vertical axis, and the frictional agitation is performed in the inclined overlapping portion J23 in a state where the rotation center axis of the joining rotary tool F is vertically inclined to the joint surface of the overlapping portion J23.

In the fifth modification of the tenth embodiment, for example, the joining rotary tool F can be provided on the robot arm having the rotation driving device such as the spindle unit at the tip end to perform friction stirring. With such a friction stirrer, the angle of the central axis of rotation of the joining rotary tool F with respect to the vertical axis can be easily changed. Thereby, even in the case where the height of the overlapping portion J21 changes, the angle of the central axis of rotation of the joining rotary tool F with respect to the vertical axis can be changed during the friction stirring, so that the joining rotary tool F can be overlapped with the overlapping portion. J21 (boundary surface) is often kept in a vertical state, and friction stir is continuously performed.

The fifth variation can achieve substantially the same effects as the tenth embodiment. Moreover, since the angle of the joining rotary tool F with respect to the vertical axis can be changed, the overlapping portion J21 (boundary surface) at the deep position can be frictionally stirred even on the inclined surface. Further, when the joint surface is a curved surface, the normal line of the joint surface and the rotation center axis of the joint turning tool F can be overlapped to perform friction stir.

[Eleventh Embodiment]

Next, a joining method relating to the eleventh embodiment of the present invention will be described. As shown in Fig. 28, in the eleventh embodiment, only the surface 211a of the metal member 211 on the insertion side of the joining rotary tool F has a height change, this point and the tenth The implementation is different.

As shown in Fig. 28, in the present embodiment, the overlapping portion J25 formed by laminating the metal member 210 and the metal member 211 is joined by friction stir. The metal member 210 is a plate-like member formed with a certain thickness.

On the one hand, the metal member 211 is the same as the lower metal member 211 related to the third modification of the tenth embodiment described above. The surface 211a of the metal member 211 is formed in a highly variable manner. The back surface 211b of the metal member 211 is flat.

The bonding method according to this embodiment is performed by an overlapping process and a bonding process. In the overlapping step, the surface 210a of the lower metal member 210 and the back surface 211b of the upper metal member 211 are overlapped. The surface 210a of the lower metal member 210 and the back surface 211b of the upper metal member 211 are in surface contact to form an overlapping portion J25. The height position of the overlapping portion J25 is constant.

In the joining step, the overlapping portion J25 is friction stired using the joining rotary tool F. In the joining step, the stirring needle F2 of the joining rotary tool F that is rotated to the right is inserted from the surface 211a of the upper metal member 211, and the joining rotary tool F is relatively moved on the surface 211a of the metal member 211. The metal around the overlapping portion J25 is frictionally stirred by the joining step to join the metal members 210 and 211. A plasticized region W is formed on the movement locus of the joining rotary tool F.

The insertion depth of the agitating needle F2 can be set such that the plasticized region W formed by the friction stir reaches at least the overlapping portion J25. However, in the present embodiment, the metal member 210 that is set to the lower end of the agitating needle F2 contacts the lower side. Degree.

In the joining process according to the present embodiment, while the insertion depth of the agitating needle F2 to the overlapping portion J25 (metal member 210) is kept constant, friction stir is performed while the agitating needle F2 is in contact with the metal members 210 and 211.

According to the bonding method of the present embodiment described above, since the upper metal member 211 and the shoulder are not in contact, even in the case where the surface 211a of the metal member 211 has a height change, the stirring needle F2 can be easily inserted until Overlap J25. Thereby, the overlapping portion J25 can be surely joined. In other words, even if the surface 211a of the metal member 211 on the insertion side of the joining rotary tool F has an upward inclination (upward slope) or a downward inclination (downward slope), the operability of the joining rotary tool F can be improved.

Moreover, since the friction stir is performed in a state where only the stirring pin F2 and the metal members 210 and 211 are in contact with each other, the action load of the friction stirrer can be reduced. Thereby, the deep position of the overlapping portion J25 can be frictionally stirred in a state where the friction stirrer does not receive a large load.

Moreover, in the joining step, the tip end of the stirring pin F2 is brought into contact with the lower metal member 210 to perform friction stir, and the overlapping portion J25 can be joined more reliably.

Further, in the above-described embodiment, the stirring pin F2 is brought into contact with both of the metal members 210 and 211 to perform friction stir. However, the agitating pin F2 may be brought into contact with only the metal member 211 on the insertion side of the joining rotary tool F. The joining process is performed. In this case, the frictional heat generated by the friction of the stirring pin F2 and the upper metal member 211 causes the metal members 210 and 211 to plastically flow, thereby joining the overlapping portions J25.

Further, in the present embodiment, although the upper side metal member 211 is in the form A part of the surface 211a (the inclined portion 213) is an inclined surface, but the present invention can be applied even in the case of a curved surface. Further, the present invention can be applied even when the inclined surface or the curved surface on the upper metal member is continuous.

The tenth embodiment, the tenth state, and the modification of the present invention are described above, but appropriate design changes can be made without departing from the gist of the present invention. For example, before the joining process, a small rotating tool can be used to perform frictional agitation from the side of the metal members or a false joining process by welding. Thereby, it is possible to prevent the occurrence of the gaps in the overlapping portions J21 and J25 when the joining process is performed.

Further, when the bonding step is performed, the marking material may be provided on both ends of the overlapping portion. The start position and the end position of the friction stir can be set on each surface of the marking material. The marking material can be removed after the joining process is completed. Thereby, the workability in the joining process can be improved. Moreover, by providing a marking material and performing a joining process, the side surface of a metal member can be beautifully modified.

2‧‧‧Base components

2a‧‧‧ Surface of the base member

2b‧‧‧Back of the base member

3‧‧‧ Cover

3a‧‧‧ Surface of the cover

3c‧‧‧ side of the cover

10‧‧‧ Groove

11‧‧‧ Cover

11a‧‧‧ underside of the cover

11b‧‧‧ sidewall of the cover

D‧‧‧Rotary axis

F‧‧‧This joint turning tool

F1‧‧‧Link Department

F2‧‧‧ stir needle

J1‧‧‧Mate

K‧‧ table

K1‧‧‧ substrate

K2‧‧‧ spacer

K3‧‧‧ clamps

W, W1‧‧‧ plasticized area

Claims (25)

A method of manufacturing a heat transfer plate, comprising: preparing a step of inserting a cover plate into a cover groove formed around a groove formed on a surface of the base member, so that a surface side of the base member and the cover plate become a convex manner is fixed on the table; and the joining step, the rotating tool equipped with the stirring needle is relatively moved along the fitting portion of the side wall of the cover groove and the side surface of the cover plate to perform friction stir; In the bonding step described above, the agitating needle is inserted into the fitting portion, and friction stir is performed in a state where only the agitating needle is in contact with the base member and the cap plate. A method of manufacturing a heat transfer plate, comprising: preparing a step of inserting a heat medium tube into a groove formed in a bottom surface of a cover groove opening on a surface of the base member, and inserting a cover plate in the cover groove to enable The base member and the front surface of the cover plate are fixed to the table in a convex shape; and in the joining step, the fitting portion of the side wall of the cover groove and the side surface of the cover plate is disposed with a stirring pin The rotating tool is relatively moved to perform friction stir; in the joining step, the stirring needle is inserted into the fitting portion, and friction stir is performed in a state where only the stirring needle is in contact with the base member and the cover. The method for producing a heat transfer plate according to claim 1 or 2, further comprising a dummy joining step of disposing the fitting portion before the joining step Engage. The method of manufacturing a heat transfer plate according to claim 3, wherein in the dummy joining step, only the stirring needle of the rotating tool is inserted into the fitting portion to perform false joining. The method for producing a heat transfer plate according to the first or second aspect, wherein the amount of deformation of at least one of the base member and the cover plate is measured, and the amount of deformation is adjusted in accordance with the amount of deformation in the bonding step. Friction stir is performed while inserting the stirring needle. A method of manufacturing a heat transfer plate, comprising: a preparation step of covering a surface of the base member by covering a groove or a recess opening on a surface of the base member, and the base member and the cover The surface side of the plate is fixed to the table in a convex manner; and in the joining process, a rotary tool equipped with a stirring needle is inserted from the surface of the cover plate, and the surface of the base member and the back surface of the cover plate overlap. a portion of the bonding tool that moves the agitating needle in contact with both the base member and the cover, or in a state in which only the cover plate is in contact with the overlapping portion Perform friction stir. The method for producing a heat transfer plate according to claim 6, wherein before the joining step, a dummy joining step is further included, and the overlapping portion is falsely joined. The method for producing a heat transfer plate according to claim 6, wherein the amount of deformation of at least one of the base member and the cover plate is measured, In the joining step, the friction stir is performed while adjusting the insertion depth of the stirring needle in accordance with the amount of deformation. The method for manufacturing a heat transfer plate according to any one of claims 1 to 2, further comprising: a burr cutting step for generating friction stir of the rotary tool after completion of the joining step The burr is removed. A method for manufacturing a heat transfer plate, comprising: a deformation step of causing a tensile stress to act on a surface side of the base member and the cover plate, and deforming the base member and the cover plate such that the surface side is convex; the cover groove is blocked a step of inserting the cover plate into a cover groove formed around a groove on the surface of the base member; and the bonding step, the fitting portion along the side wall of the cover groove and the side surface of the cover plate The rotating tool of the stirring needle is relatively moved to perform friction stirring. In the joining step, the stirring needle is inserted into the fitting portion, and only the stirring needle is frictionally stirred in a state in which the base member and the cover plate are in contact with each other. A method for producing a heat transfer plate, comprising: a deformation step of causing a tensile stress to act on a surface side of a base member and a cover plate, and deforming the base member and the cover plate such that the surface side is convex; a tube insertion step of inserting a tube for a heat medium into a groove formed in a bottom surface of a lid groove opened on a surface of the base member; a cover insertion step of inserting the cover sheet into the lid groove; In the joining step, the rotating tool provided with the stirring needle is relatively moved to perform friction stirring along the fitting portion of the side wall of the lid groove and the side surface of the lid, and the stirring step is inserted into the inserting step. The joint portion is friction stirlable in a state where only the agitating needle is in contact with the base member and the cover plate. The method for producing a heat transfer plate according to claim 10, further comprising a dummy joining step of splicing the fitting portion before the joining step. The method of manufacturing a heat transfer plate according to claim 12, wherein in the dummy joining step, only the stirring needle of the rotating tool is inserted into the fitting portion to perform false joining. The method for producing a heat transfer plate according to claim 10, wherein the amount of deformation of at least one of the base member and the cover plate is measured, and the amount of deformation is adjusted in the bonding step. Friction stirring is performed while inserting the agitating needle. A method for producing a heat transfer plate includes: a deformation step of causing a tensile stress to act on a surface side of a base member and a cover plate, and deforming the base member and the cover plate such that the surface side is convex; The cover plate is superposed on the surface of the base member in such a manner as to cover a groove or a recess that is open on the surface of the base member; and the dummy joint process is to falsely engage the overlapping portion of the base member and the cover plate; In the joining step, a rotating tool equipped with a stirring needle is inserted from a surface of the cover plate, and the rotating tool is relatively moved along an overlapping portion between the surface of the base member and the back surface of the cover plate; The friction stirrage of the overlapping portion is performed only in a state in which the agitating needle is in contact with both the base member and the cover, or in a state in which only the cover is in contact with the cover. The method for producing a heat transfer plate according to claim 15, wherein the amount of deformation of at least one of the base member and the cover plate is measured, and the agitation is adjusted in accordance with the amount of deformation in the bonding step. Friction stir is performed while inserting the needle. The method for manufacturing a heat transfer plate according to any one of the preceding claims, further comprising: a burr cutting step for generating friction stir of the rotary tool after completion of the joining step The burr is removed. A joining method comprising: a fitting step of fitting metal members whose surface height changes to each other to form a fitting portion having a height change; and a joining step of being coupled to a rotary shaft of the friction stirrer by a stirring needle Rotating the tool to frictionally stir the height-changing fitting portion; a spiral groove is engraved on the peripheral surface of the agitating needle; and the spiral groove is rotated from the base of the agitating needle in a case where the rotating tool is rotated to the right The end is forwardly facing in a counterclockwise manner; in the case where the rotating tool is rotated to the left, the spiral groove is engraved clockwise from the base end to the front end of the agitating needle; wherein, in the aforementioned joining process In the aforementioned friction stirrer and the foregoing Among the rotary tools, only the agitating needle of the aforementioned rotary tool contacts the aforementioned metal member and performs friction stir in a state where frictional heat occurs. The joining method according to claim 18, wherein the joining step is performed while frictionally stirring while maintaining the depth of insertion of the fitting with respect to height change. The joining method according to claim 18, wherein the joining step is such that the depth of the plasticized region formed by the friction stir is approximately constant, and the depth of insertion of the fitting portion with respect to the change in height is adjusted. A bonding method comprising: an overlapping step of superposing a back surface of at least one of the metal members having a height change on the back surface of at least one surface of the metal member having a height change on the surface to generate an overlapping portion having a height change; and a bonding step; Inserting a rotating tool having a stirring needle from the surface of the other metal member to frictionally stir the overlapping portion having a height change; a spiral groove is engraved on a peripheral surface of the stirring needle; and the rotating tool is rotated to the right In the case, the spiral groove is engraved from the base end of the agitating needle to the front end in a counterclockwise manner; in the case where the rotary tool is rotated to the left, the spiral groove is forwarded from the base end of the agitating needle to the front end. In the joining step, only the stirring member of the rotating tool contacts only one of the metal member and the other metal member, or only the other metal member is contacted. Friction stir is performed underneath. The joining method according to claim 21, wherein in the joining step, the agitation is performed while the insertion depth of the overlapping portion of the agitation is changed to a constant value. The joining method according to claim 21, wherein in the joining step, the depth of the plasticized region formed by friction stir is approximately constant, and the insertion of the overlapping portion of the stirring for height change is adjusted. depth. A bonding method comprising: an overlapping step of forming an overlapping portion on a surface of one of the metal members by overlapping a back surface of the other metal member whose surface height is changed; and a bonding step of the other metal member that changes from the surface height a surface of a rotating tool having a stirring needle for frictionally stirring the overlapping portion; a spiral groove is engraved on a peripheral surface of the agitating needle; and the spiral groove is rotated from the foregoing by rotating the rotating tool to the right The base end of the stirring needle is engraved in a counterclockwise manner toward the front end; in the case where the rotating tool is rotated to the left, the spiral groove is engraved clockwise from the base end to the front end of the stirring needle; In the step, only the agitating needle of the rotating tool contacts only one of the metal member and the other of the metal members, or the metal member is contacted with the other metal member. The joining method according to any one of claims 18 to 24, wherein the rotary tool is attached to a machine having a rotary drive at a front end The arm is friction stir.