JP6577696B2 - Manufacturing method of composite plate without internal flow path - Google Patents

Description

The present invention relates to the production how a composite plate without the flow path therein.

  Patent Document 1 describes a method for manufacturing a heat transfer plate in which a fluid is circulated through a flow path formed inside a base member to perform heat exchange or the like. The base member is formed with a lid groove that opens on the surface and a concave groove formed on the bottom surface of the lid groove. When manufacturing the heat transfer plate, a lid plate is disposed in the lid groove, and friction stir welding is performed on the abutting portion formed by the side surface of the lid plate and the side wall of the lid groove. When performing friction stir welding, the stirring pin of the rotating tool is inserted deep into the abutting portion while the lower end surface of the shoulder of the rotating tool is in contact with the base member and the cover plate. By performing frictional stirring to a deep position of the abutting portion, the water tightness and air tightness of the heat transfer plate can be improved.

JP 2002-257490 A

  For example, when the flow path of the heat transfer plate is provided at a deep position of the base member, it is necessary to increase the depth of the cover groove and increase the thickness of the cover plate. In such a case, it is necessary to increase the length and outer diameter of the stirring pin of the rotary tool used in the friction stir welding. Further, as the stirring pin becomes larger, the outer diameter of the shoulder portion also increases. There is a need to. However, when the outer diameter of the shoulder portion is increased, the friction between the base member, the cover plate, and the shoulder portion increases, which causes a problem that the load applied to the friction stirrer increases. This makes it difficult to form a flow path at a deep position of the heat transfer plate.

  Further, for example, a rotating tool may be inserted perpendicularly from the surface of the metal member to the overlapping portion formed by overlapping the plate-like metal members, and the metal members may be friction stir welded. Even in such a case, there is a problem that friction stir welding becomes difficult when the thickness of the metal member is large and the overlapped portion is at a deep position.

  Furthermore, there is a problem that the surface of the heat transfer plate or the surfaces of the joined metal members are deformed into a concave shape due to heat shrinkage accompanying friction stir welding.

From this point of view, the present invention, even if the overlapping portion of the heavy I combined metal member is in a deep position, suppressing deformation of the metal member to each other which are joined together can easily be friction stir welding It is an object of the present invention to provide a method for manufacturing a composite plate that does not have a flow path inside .

Further, the present invention is a method for manufacturing a composite plate in which a flow path is not provided in an interior where two plate-like metal members are joined using a rotary tool provided with a stirring pin, the surface of one of the metal members A superposition part forming step of forming a superposition part by superimposing the back surface of the other metal member, and inserting the stirring pin from the surface of the other metal member, the surface of the one metal member and the other metal includes a main bonding step of polymerizing unit relatively moves the rotary tool along the back surface of the member, before Symbol main bonding step, inserting the stirring pin rotated from the surface of the metal member of the other side, while contacting only the stirring pin only to the metal member of the other side, and performing friction stir of the overlapping portion in a state of exposing the proximal end of the stirring pin.

According to this method, since only the stirring pin of the rotary tool comes into contact towards piece of metal member, it is possible to reduce friction between the rotating tool in comparison with the conventional manufacturing method, friction stir device The load applied to can be reduced. That is, according to the present invention, since the load on the friction stirrer can be reduced, the superposed portion at a deep position can be easily friction stir welded .

  Moreover, it is preferable to include the temporary joining process of temporarily joining the said superposition | polymerization part before the said main joining process. According to this method, it is possible to prevent the opening of the overlapped portion during the main joining step.

  Moreover, it is preferable to include the burr cutting process which cuts out the burr | flash produced by the friction stirring of the said rotary tool after completion | finish of the said main joining process. According to such a method, the joined metal member can be molded neatly.

According to the method of manufacturing a composite plate that does not have a flow passage inside according to the present invention, even when the overlapped portion of the stacked metal members is at a deep position, the friction stir welding can be easily performed and the bonding can be performed. The deformation of the formed metal members can be suppressed.

(A) is the side view which showed the rotation tool for this joining of this embodiment, (b) is the schematic cross section which showed the joining form of the rotation tool for this joining. (A) is the side view which showed the rotary tool for temporary joining of this embodiment, (b) is the schematic cross section which showed the joining form of the rotary tool for temporary joining. It is a perspective view which shows the heat exchanger plate which concerns on 1st embodiment of this invention. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, Comprising: (a) shows a preparatory process, (b) shows a cover groove | channel obstruction | occlusion process. (A) is a top view which shows the tab material arrangement | positioning process of the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, (b) is a perspective view which shows a cooling plate. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, Comprising: (a) shows a temporary joining process, (b) shows this joining process. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 2nd embodiment of this invention, Comprising: (a) shows a preparatory process, (b) shows a cover groove | channel obstruction | occlusion process. (A) is sectional drawing which shows the main joining process which concerns on 2nd embodiment, (b) is sectional drawing which shows a modification. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 3rd embodiment of this invention, Comprising: (a) shows a temporary joining process, (b) shows this joining process. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 4th embodiment of this invention, Comprising: (a) shows a temporary joining process, (b) shows this joining process. (A) is sectional drawing which shows the friction stir welding method which concerns on 5th embodiment of this invention, (b) is sectional drawing which shows the modification of 5th embodiment.

[First embodiment]
A first embodiment of the present invention will be described in detail with reference to the drawings. First, the main joining rotary tool and the temporary joining rotary tool used in the present embodiment will be described.

  As shown in FIG. 1A, the main joining rotary tool F is composed of a connecting portion F1 and a stirring pin F2. The main joining rotary tool F corresponds to a “rotary tool” in the claims. The main rotating tool F for joining is formed of, for example, tool steel. The connection part F1 is a part connected to the rotating shaft D of the friction stirrer shown in FIG. The connecting portion F1 has a cylindrical shape, and is formed with screw holes B and B to which bolts are fastened.

  The stirring pin F2 hangs down from the connecting portion F1 and is coaxial with the connecting portion F1. The stirring pin F2 is tapered as it is separated from the connecting portion F1. A spiral groove F3 is formed on the outer peripheral surface of the stirring pin F2. In the present embodiment, the spiral groove F3 is formed in a counterclockwise direction from the top to the bottom in order to rotate the main welding rotary tool F to the right.

  In addition, when rotating this welding rotation tool F counterclockwise, it is preferable to form the spiral groove F3 clockwise as it goes from top to bottom. By setting the spiral groove F3 in this way, the plastic fluidized metal at the time of frictional stirring is guided to the tip side of the stirring pin F2 by the spiral groove F3. Thereby, the quantity of the metal which overflows to the exterior of a to-be-joined metal member (the base member 2 and the cover board 5 mentioned later) can be decreased.

  As shown in FIG. 1B, when the friction stir welding is performed using the main rotating tool F for welding, only the rotated stirring pin F2 is inserted into the metal member to be joined and connected to the metal member to be joined. It is moved away from the part F1. In other words, the friction stir welding is performed with the base end portion of the stirring pin F2 exposed. A plasticized region W is formed in the movement locus of the main rotating tool F for bonding by hardening the friction-stirred metal.

  As shown in FIG. 2A, the temporary bonding rotary tool G includes a shoulder portion G1 and a stirring pin G2. The temporary joining rotary tool G is made of, for example, tool steel. As shown in FIG. 2B, the shoulder portion G1 is a portion that is connected to the rotating shaft D of the friction stirrer and is a portion that holds the plastic fluidized metal. The shoulder portion G1 has a cylindrical shape. The lower end surface of the shoulder portion G1 has a concave shape in order to prevent the fluidized metal from flowing out.

  The stirring pin G2 is suspended from the shoulder portion G1, and is coaxial with the shoulder portion G1. The stirring pin G2 is tapered as it is separated from the shoulder portion G1. A spiral groove G3 is formed on the outer peripheral surface of the stirring pin G2.

  As shown in FIG. 2B, when friction stir welding is performed using the temporary welding rotary tool G, the rotated stirring pin G2 and the lower end surface of the shoulder portion G1 are inserted into the metal member to be joined. Move. A plasticized region W <b> 1 is formed in the movement locus of the temporary bonding rotary tool G by hardening the friction-stirred metal.

  Next, the heat transfer plate of this embodiment will be described. As shown in FIG. 3, the heat transfer plate 1 according to the present embodiment is mainly composed of a base member 2 and a lid plate 5. The base member 2 has a substantially rectangular parallelepiped shape. A concave groove 3 and a cover groove 4 are formed in the base member 2. The material of the base member 2 is not particularly limited as long as friction stirring is possible, but in this embodiment, it is an aluminum alloy.

  The concave groove 3 penetrates from one side surface toward the other side surface in the center of the base member 2. The concave groove 3 is recessed on the bottom surface of the lid groove 4. The bottom of the concave groove 3 has an arc shape. The opening of the concave groove 3 is opened to the surface 2 a side of the base member 2.

  The lid groove 4 is wider than the groove 3 and is formed continuously with the groove 3 on the surface 2 a side of the groove 3. The lid groove 4 has a rectangular shape in sectional view and is open to the surface 2a side.

  The lid plate 5 is a plate-like member that is inserted into the lid groove 4. In this embodiment, the cover plate 5 is formed of an aluminum alloy that is the same material as the base member 2. The lid plate 5 has the same shape as the hollow portion of the lid groove 4 so as to be inserted into the lid groove 4 without a gap.

  The pair of side walls of the lid groove 4 and the pair of side surfaces of the lid plate 5 are abutted to form the abutting portions J and J. The abutting portions J and J are joined by friction stirring over the entire length in the depth direction. A space surrounded by the groove 3 of the heat transfer plate 1 and the lower surface of the lid plate 5 is a flow path through which the fluid flows.

  Next, the manufacturing method of the heat exchanger plate which concerns on 1st embodiment is demonstrated. In the method for manufacturing a heat transfer plate, a preparation process, a cover groove closing process, a tab material arranging process, a temporary bonding process, and a main bonding process are performed.

  As shown to (a) of FIG. 4, a preparation process is a process of preparing the base member 2. As shown in FIG. In the preparation step, the concave groove 3 and the cover groove 4 are formed by cutting using an end mill or the like. In addition, you may use the base member 2 in which the ditch | groove 3 and the cover groove | channel 4 were formed previously by die-casting or extrusion molding.

  As shown in FIG. 4B, the lid groove closing step is a step of inserting the lid plate 5 into the lid groove 4. The side wall of the lid groove 4 and the side surface of the lid plate 5 are abutted to form the abutting portions J and J. The surface of the cover plate 5 and the surface 2a are flush with each other.

  As shown in FIG. 5A, the tab material arranging step is a step of arranging the tab materials 10, 10 on the side surface of the base member 2. The tab material 10 is a member that sets a start position and an end position of friction stirring described later. The tab member 10 is in surface contact with the opposing side surfaces of the base member 2 and is disposed on the extended line of the abutting portions J and J. In this embodiment, the tab material 10 is formed of an aluminum alloy that is the same material as the base member 2. The tab material 10 is joined by welding the corners between the tab material 10 and the base member 2.

  FIG. 5B is a perspective view showing a cooling plate used in the present embodiment. The cooling plate R is composed of a main body R1 and a cooling pipe R2. The cooling plate R is a device that cools the base member 2 and the cover plate 5 during a temporary joining step and a main joining step described later. The cooling plate R is disposed under the base member 2 to which the tab members 10 are attached in the temporary joining process and the main joining process.

  The main body R1 of the cooling plate R is made of metal and has a rectangular parallelepiped shape. The cooling pipe R2 is a pipe disposed inside the main body R1. A cooling medium (cold water or cold air) flows through the inside of the cooling pipe R2. The arrangement position of the cooling pipe R2 with respect to the main body R1 is not particularly limited, but in the present embodiment, the cooling pipe R2 is arranged so as to exhibit a U-shape in plan view. The straight portions of the cooling pipe R2 are arranged in parallel to each other. When the cooling plate R is disposed below the base member 2, when viewed in plan, the straight portion of the cooling pipe R2 and the abutting portion J substantially overlap each other.

  As shown to (a) of FIG. 6, a temporary joining process is a process of performing friction stir welding preliminarily with respect to the abutting parts J and J using the rotation tool G for temporary joining. In the temporary bonding step, the cooling plate R is disposed under the base member 2 and the temporary bonding is performed while cooling the base member 2 and the cover plate 5. The start position and the end position of the temporary joining step are not particularly limited as long as they are on the surface of the base member 2 and the tab material 10, but are set on the surface of the tab material 10 in this embodiment.

  Specifically, the starting position of the temporary joining step is set on the surface of one of the tab members 10, and friction stir welding is performed on the entire length of one of the abutting portions J. A plasticized region W1 is formed in the movement locus of the temporary joining rotary tool G. When the temporary joining rotary tool is moved to the other tab member 10, it is folded back as it is on the surface of the tab member 10, and friction stir welding is performed over the entire length of the other butted portion J in the extending direction. When the temporary joining rotary tool G is moved to the one tab member 10, the temporary joining rotary tool G is detached from the tab member 10.

  As shown in FIG. 6B, the main joining step is a step of performing friction stir welding on the abutting portions J and J using the main welding rotating tool F. In the main joining step, following the temporary joining step, the friction stir welding is performed while cooling the base member 2 and the cover plate 5 with the cooling plate R. It is preferable to set the start position and the end position of the main joining process on the surface of the tab material 10. When inserting the main joining rotary tool F into the tab member 10, the punch hole of the temporary joining rotary tool G may be used, or a separate pilot hole may be provided in the tab member 10, and You may insert the rotation tool F for joining.

  In the main joining step, friction stir welding is performed so as to trace the plasticized region W1 formed in the temporary joining step. In the main joining step, it is preferable to insert the main welding rotary tool F so that the tip of the main welding rotary tool F reaches the bottom surface of the lid groove 4. Since the stirring pin F <b> 2 is longer than the depth of the lid groove 4, even if the tip of the stirring pin F <b> 2 reaches the bottom surface of the lid groove 4, the connecting portion F <b> 1 does not contact the base member 2 and the lid plate 5. That is, in the main joining step, the surfaces of the base member 2 and the cover plate 5 are not pressed by the lower surface of the connecting portion F1.

  A plasticized region W is formed in the movement trajectory of the main rotating tool for welding F. The distance between the abutting portion J and the groove 3 is preferably set so that the plastic fluid material does not flow into the groove 3 when the main joining process is performed. When the main joining process is completed, the tab material 10 is cut off from the base member 2.

  In addition, you may perform the burr cutting process which cuts the burr | flash produced by friction stirring after completion | finish of this joining process. By performing the burr cutting process, the surfaces of the base member 2 and the cover plate 5 can be smoothed.

  According to the heat transfer plate manufacturing method according to the present embodiment described above, only the agitation pin F2 of the main welding rotary tool F contacts the base member 2 and the cover plate 5 during the main bonding step. Therefore, the friction between the base member 2 and the cover plate 5 and the main rotating tool F can be reduced as compared with the conventional manufacturing method, and the load applied to the friction stirrer can be reduced. That is, according to the present embodiment, the load on the friction stirrer can be reduced even if friction stirring is performed at a deep position, so that the flow path of the heat transfer plate 1 can be easily formed at a deep position.

  Further, in the main joining step, it is not always necessary to perform frictional stirring over the entire length in the depth direction of the abutting portions J and J, but frictional stirring is performed over the entire length of the butting portion J as in this embodiment. By doing, the water-tightness and airtightness of the heat exchanger plate 1 can be improved.

  In addition, friction heat can be reduced by performing frictional stirring while cooling the base member 2 and the cover plate 5 with the cooling plate R. Thereby, a deformation | transformation of the heat exchanger plate 1 accompanying the thermal contraction after joining can be suppressed. Further, by arranging the cooling flow path of the cooling plate R along the abutting portion J, it is possible to efficiently cool the portion where the frictional heat is generated. Moreover, since the back surface 2b of the base member 2 and the surface of the cooling plate R are brought into surface contact, the cooling efficiency can be improved.

  Moreover, the opening of the base member 2 and the cover plate 5 when performing the main bonding step can be prevented by performing the temporary bonding step. Further, in the temporary joining step and the main joining step, the rotary tool G for temporary joining and the rotational tool F for main joining are not detached from the base member 2 during the friction stirring, and each rotary tool is moved in the manner of one stroke. , Work can be reduced.

  In the temporary joining step, the friction stir may be performed discontinuously so that the plasticized region W1 by the temporary joining rotary tool G is intermittently formed. In the temporary joining step, the abutting portions J and J may be joined by welding. Moreover, you may temporarily join the tab material 10 and the base member 2 using the rotation tool G for temporary joining.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. The heat transfer plate according to the second embodiment is different from the first embodiment in that the heat transfer pipe 6 is provided. The heat medium pipe 6 is a member through which a fluid flows.

  In the method for manufacturing a heat transfer plate according to the second embodiment, a preparation process, a heat medium tube insertion process, a lid groove closing process, a temporary bonding process, and a main bonding process are performed.

  As shown in (a) of FIG. 7, the preparation process is a process of preparing the base member 2.

  As shown in FIG. 7B, the heat medium tube insertion step is a step of inserting the heat medium tube 6 into the groove 3. The size and the like of the groove 3 and the heat medium pipe 6 may be set as appropriate, but in this embodiment, the outer diameter of the heat medium pipe 6 and the width and depth of the groove 3 are substantially equal. Yes.

  The lid groove closing step is a step of inserting the lid plate 5 into the lid groove 4. The side wall of the lid groove 4 and the side surface of the lid plate 5 are abutted to form an abutting portion J. When the cover plate 5 is inserted into the cover groove 4, the heat medium tube 6 and the cover plate 5 come into contact with each other, and the surface 2 a of the base member 2 and the surface of the cover plate 5 are flush with each other.

  The temporary joining step is a step of performing preliminary joining to the abutting portion J. In the temporary bonding step, as in the first embodiment, the cooling plate R is disposed under the base member 2 and the temporary bonding is performed while cooling the base member 2 and the cover plate 5.

  As shown in FIG. 8, the main joining step is a step of performing friction stir welding on the abutting portions J and J using the main welding rotating tool F. In the main joining step, as in the first embodiment, the friction stir welding is performed while cooling the base member 2 and the cover plate 5 with the cooling plate R, following the temporary joining step. Plasticizing regions W and W are formed on the movement trajectory of the main rotating tool F for welding. The plasticized region W is formed over the entire length of the abutting portions J and J in the depth direction.

  The manufacturing method of the heat transfer plate according to the second embodiment can achieve substantially the same effect as the first embodiment. Further, the heat transfer plate 1A including the heat medium pipe 6 can be easily manufactured.

  Further, for example, the shapes of the concave groove 3, the cover groove 4, the cover plate 5, and the heat medium pipe 6 according to the first embodiment and the second embodiment are merely examples, and may be other shapes. . Moreover, when a level | step difference arises between the surface 2a of the base member 2 and the surface of the plasticization area | region W after this joining process, overlay welding may be performed so that the said level | step difference may be filled up. Alternatively, a metal member may be disposed on the surface of the plasticized region W, and the metal member and the base member 2 may be friction stir welded with a rotary tool.

  Moreover, although the case where the cover groove | channel 4 was provided was illustrated in this embodiment, you may make it insert the cover board 5 directly in the concave groove 3, without providing the cover groove | channel 4. FIG.

  Further, as shown in FIG. 8B, when the gap Q is formed around the heat medium pipe 6, the gap Q may be filled by the main joining step. When the lid plate 5 is inserted into the lid groove 4 in the lid groove closing step, a gap Q is formed by the concave groove 3, the lower surface of the lid plate 5, and the heat medium pipe 6. In the main joining step, the plastic fluidized material formed by the main joining rotating tool F is caused to flow into the gap Q. Thereby, since the space | gap part Q around the pipe | tube 6 for heat media is filled with a metal, watertightness and airtightness can be improved more.

[Third embodiment]
Next, a third embodiment of the present invention will be described. The manufacturing method of the heat transfer plate according to the third embodiment is different from the first embodiment in that the lid groove 4 is not formed in the base member 2 and the lid plate 5 is placed on the surface 2a of the base member 2. To do.

  In the method for manufacturing a heat transfer plate according to the third embodiment, a preparation process, a groove closing process, a temporary bonding process, and a main bonding process are performed.

  As shown in (a) of FIG. 9, the preparation process is a process of preparing the base member 2. A concave groove 3 is formed on the surface 2 a of the base member 2.

  The groove closing step (blocking step) is a step of placing the cover plate 5 on the surface 2 a of the base member 2 and covering the upper portion of the groove 3. In the concave groove closing step, the front surface 2a of the base member 2 and the back surface 5b of the cover plate 5 are overlapped to form the overlapping portion J1.

  The temporary bonding step is a step of performing preliminary bonding to the overlapping portion J1. In the temporary bonding step, the cooling plate R is disposed under the base member 2 and the temporary bonding is performed while cooling the base member 2 and the cover plate 5. In the present embodiment, in the present embodiment, the temporary bonding rotary tool G is inserted from the side surfaces of the base member 2 and the cover plate 5, and friction stir welding is performed on the overlapping portion J1. After the temporary joining step, a plasticized region W1 is formed on the side surfaces of the base member 2 and the cover plate 5.

  As shown in FIG. 9B, the main joining step is a step of performing friction stir welding on the overlapping portion J1 using the main welding rotating tool F. In the main joining step, following the temporary joining step, the friction stir welding is performed while cooling the base member 2 and the cover plate 5 with the cooling plate R. In the present embodiment, the front end of the stirring pin F <b> 2 of the main rotating tool F is inserted into the base member 2 by being inserted vertically from the surface 5 a of the lid plate 5. Moreover, in this joining process, friction stirring is performed in the state which does not contact the connection part F1 with the cover plate 5. FIG. Thereby, the heat transfer plate 1A is formed.

  Even if the cover plate 5 having a large plate thickness is placed on the surface 2a of the base member 2 without providing the cover groove 4 as in the method of manufacturing the heat transfer plate according to the third embodiment, the heat transfer plate 1A can be easily manufactured. That is, in the third embodiment, the thickness of the cover plate 5 is large and the overlapping portion J1 is located at a deep position, but only the stirring pin F2 is in contact with the base member 2 and the cover plate 5, so that Compared with this manufacturing method, the friction between the base member 2 and the cover plate 5 and the main rotating tool F can be reduced, and the load applied to the friction stirrer can be reduced. That is, according to the present embodiment, the load on the friction stirrer can be reduced even if the deep position is frictionally stirred, so that the flow path of the heat transfer plate 1A can be easily formed at the deep position.

  In addition, friction heat can be reduced by performing frictional stirring while cooling the base member 2 and the cover plate 5 with the cooling plate R. Thereby, the deformation | transformation of the heat exchanger plate 1A accompanying the thermal contraction after joining can be suppressed. Further, by arranging the cooling flow path of the cooling plate R along the abutting portion J, it is possible to efficiently cool the portion where the frictional heat is generated. Moreover, since the back surface 2b of the base member 2 and the surface of the cooling plate R are brought into surface contact, the cooling efficiency can be improved.

  Moreover, the opening of the base member 2 and the cover plate 5 can be prevented by performing the temporary bonding step when performing the main bonding step.

  In the temporary joining step, the friction stir may be performed discontinuously so that the plasticized region W1 by the temporary joining rotary tool G is intermittently formed. Further, in the temporary joining step, the overlapped portion J1 may be joined by welding. Moreover, you may perform a temporary joining process and a main joining process using a tab material like 1st embodiment.

  In this embodiment, the tip of the stirring pin F2 is set so as to be pushed to the position where it reaches the base member 2, but is set so as not to reach the base member 2. That is, only the stirring pin F2 and the cover plate 5 are set. It may be set so that the overlapping portion J1 is frictionally stirred by being pushed to the position where it contacts. In such a case, the base member 2 and the cover plate 5 are plastically fluidized by the frictional heat generated by the contact between the stirring pin F2 and the cover plate 5, whereby the overlapping portion J1 is joined.

  In the present embodiment, the main welding rotary tool F is inserted from the front surface 5a of the cover plate 5, but the main welding rotary tool F is inserted from the back surface 2b of the base member 2 to friction stir the overlapping portion J1. You may do it. In this case, the cooling plate R is disposed on the surface 5 a side of the lid plate 5, and the friction stir welding is performed while cooling the base member 2 and the lid plate 5 with the cooling plate R. Even in such a case, the agitation pin F2 may be pushed to a position where it contacts both the base member 2 and the cover plate 5, or may be pushed to a position where only the base member 2 is brought into contact for friction stirring. It may be set.

[Fourth embodiment]
Next, a fourth embodiment of the present invention will be described. The method for manufacturing a heat transfer plate according to the fourth embodiment is different from the third embodiment in that a recess 20 having a large depression is formed.

  The manufacturing method of the heat exchanger plate according to the fourth embodiment performs a preparation process, a closing process, a temporary bonding process, and a main bonding process.

  As shown in (a) of FIG. 10, the preparation process is a process of preparing the base member 2. A recess 20 is formed in the surface 2 a of the base member 2. The recess 20 is a recess that is sufficiently wider than the recess 3.

  The recess closing process (blocking process) is a process of placing the cover plate 5 on the surface 2 a of the base member 2 and covering the top of the recess 20. In the recess closing process, the front surface 2a of the base member 2 and the back surface 5b of the cover plate 5 are overlapped to form the overlapping portion J1. As shown in FIG. 10 (b), in the temporary joining step and the main joining step, a cooling plate RA is disposed under the base member 2, and the base plate 2 and the cover plate 5 are cooled by the cooling plate RA and friction is applied. Stir welding is performed. The cooling pipe RA2 of the cooling plate RA is disposed along the movement locus of the main welding rotary tool F. Since the temporary bonding step and the main bonding step are substantially the same as those in the third embodiment, detailed description thereof is omitted. Thereby, the heat exchanger plate 1B is formed.

  In the method for manufacturing a heat transfer plate according to the fourth embodiment, substantially the same effect as that of the third embodiment can be achieved. In addition, according to the fourth embodiment, the heat transfer plate 1 </ b> B can be easily formed even when the cover plate 5 having the recess 20 larger than the recess 3 and having a large plate thickness is placed. .

  In the present embodiment, the tip of the stirring pin F2 is set to be pushed down to the position reaching the base member 2, but is set not to reach the base member 2, that is, only the stirring pin F2 and the cover plate 5 are set. It may be set so that the overlapping portion J1 is frictionally stirred by being pushed to the position where it contacts. In such a case, the base member 2 and the cover plate 5 are plastically fluidized by the frictional heat generated by the contact between the stirring pin F2 and the cover plate 5, whereby the overlapping portion J1 is joined.

  In the present embodiment, the main welding rotary tool F is inserted from the front surface 5a of the cover plate 5, but the main welding rotary tool F is inserted from the back surface 2b of the base member 2 to friction stir the overlapping portion J1. You may do it. In this case, the cooling plate RA is disposed on the surface 5a side of the lid plate 5, and the friction stir welding is performed while cooling the base member 2 and the lid plate 5 with the cooling plate RA. Even in this case, the stirring pin F2 may be pushed to a position where it contacts both the base member 2 and the cover plate 5, or may be pushed to a position where it only contacts the base member 2, and set so as to be frictionally stirred. May be.

[Fifth embodiment]
Next, a friction stir welding method according to the fifth embodiment of the present invention will be described. The fifth embodiment is different from the other embodiments in that metal members that are not provided with a channel such as the groove 3 and the recess 20 are joined together.

  In the friction stir welding method according to the fifth embodiment, a preparation step, an overlaying step, a temporary joining step, and a main joining step are performed.

  As shown to (a) of FIG. 11, a preparation process is a process of preparing the metal members 31 and 32. As shown in FIG. The metal members 31 and 32 are plate-shaped metal members. The types of the metal members 31 and 32 may be appropriately selected from metals that can be frictionally stirred.

  The overlapping step (overlapping part forming step) is a step of overlapping the metal members 31 and 32. In the superimposing step, the overlap portion J1 is formed by superimposing the back surface 32b of the metal member 32 on the front surface 31a of the metal member 31.

  The temporary bonding step is a step of performing preliminary bonding to the overlapping portion J1. In the temporary joining step, the cooling plate RA is disposed under the metal member 31, and the friction stir welding is performed while the metal members 31 and 32 are cooled by the cooling plate R. In the present embodiment, in the present embodiment, the temporary bonding rotary tool G is inserted from the side surfaces of the metal members 31 and 32, and the friction stir welding is performed on the overlapping portion J1. After the temporary joining step, a plasticized region W1 is formed on the side surfaces of the metal members 31 and 32.

  The main joining step is a step of performing friction stir welding on the overlapping portion J1 by using the main welding rotating tool F. In the main joining step, the friction stir welding is performed following the temporary joining step while cooling the metal members 31 and 32 with the cooling plate RA. In the present embodiment, the main welding rotary tool F is inserted vertically from the surface 32 a of the metal member 32, and the tip of the stirring pin F <b> 2 is set to enter the metal member 31. Moreover, in this joining process, friction stirring is performed in the state which does not contact the connection part F1 with the metal member 32. FIG. Thereby, the composite plate 1C is formed.

  According to the method for manufacturing a heat transfer plate according to the fifth embodiment, the composite plate 1 </ b> C having no flow path inside is easily formed. In particular, even when the thickness of the metal member 32 is large and the overlapping portion J1 is located at a deep position, only the stirring pin F2 is in contact with the metal members 31 and 32. In comparison, the friction between the metal members 31 and 32 and the main welding rotary tool F can be reduced, and the load applied to the friction stirrer can be reduced. Thereby, even if the superposition | polymerization part J1 exists in a deep position, friction stir welding can be performed easily.

  Moreover, frictional heat can be reduced by performing frictional stirring while cooling the metal members 31 and 32 with the cooling plate RA. Thereby, the deformation | transformation of 1 C of composite boards accompanying the thermal contraction after joining can be suppressed. In addition, by arranging the cooling flow path of the cooling plate RA along the movement trajectory of the main welding rotary tool F, it is possible to efficiently cool the portion where the frictional heat is generated. Moreover, since the back surface 31b of the metal member 31 and the surface of the cooling plate RA are brought into surface contact, the cooling efficiency can be increased.

  Moreover, by performing a temporary joining process, when performing this joining process, the opening between the metal members 31 and 32 can be prevented.

  In the temporary joining step, the friction stir may be performed discontinuously so that the plasticized region W1 by the temporary joining rotary tool G is intermittently formed. Further, in the temporary joining step, the overlapped portion J1 may be joined by welding. Moreover, you may perform a temporary joining process and a main joining process using a tab material like 1st embodiment.

  Further, as shown in FIG. 11B, when the main joining process is performed, the tip of the stirring pin F2 is prevented from reaching the metal member 31, that is, the stirring pin F2 is in contact with only the metal member 32. Friction stirring may be performed by setting as described above. In such a case, the metal members 31 and 32 can be joined together by bringing the plasticized region W and the overlapping portion J1 into contact with each other. That is, the superposed portion J1 can be joined by plastic fluidizing the metal members 31 and 32 by frictional heat generated by the contact between the stirring pin F2 and the metal member 32.

  In the second embodiment to the fifth embodiment as well, a burr cutting step for cutting burrs generated by friction stirring may be performed after the end of the main joining step. By performing the burr cutting process, the surfaces of the base member 2, the cover plate 5, and the metal members 31, 32 can be smoothed.

DESCRIPTION OF SYMBOLS 1 Heat transfer plate 2 Base member 3 Concave groove 4 Cover groove 5 Cover plate 6 Heat medium pipe 10 Tab material 20 Concave part 31 Metal member 32 Metal member F Rotating tool for main joining (rotating tool)
F1 Stirring pin G Temporary joining rotary tool J Butting part J1 Superposition part R Cooling plate W Plasticization region

Claims (3)

A method of manufacturing a composite plate that does not provide a flow path inside the two plate-shaped metal members that are joined using a rotary tool equipped with a stirring pin,
A superposition part forming step of superposing the front surface of one metal member and the back surface of the other metal member to form a superposition part;
A main joining step in which the stirring pin is inserted from the surface of the other metal member, and the rotary tool is relatively moved along the overlapping portion between the surface of the one metal member and the back surface of the other metal member; Including
Prior SL main bonding step, inserting the stirring pin rotated from the surface of the metal member other hand, while only the stirring pin contacting only to the metal member of the other hand, the base end portion of the stirring pin A method for producing a composite plate without providing a flow path inside, wherein friction stir of the overlapping portion is performed in an exposed state.   The method of manufacturing a composite plate according to claim 1, further comprising a temporary bonding step of temporarily bonding the overlapped portion before the main bonding step.   3. The composite plate having no flow path inside according to claim 1, further comprising a burr cutting step for cutting off a burr generated by frictional stirring of the rotary tool after the main joining step. 4. Manufacturing method.

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