JP6248730B2 - Manufacturing method of heat transfer plate and manufacturing method of composite plate having no flow path inside - Google Patents

Description

  The present invention relates to a method for manufacturing a heat transfer plate and a friction stir welding method.

  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 bottom 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.

  Also, when a rotating tool is inserted from the surface side of the base member or metal member and friction stir welding is performed, the heat transfer plate or the metal members bonded together are deformed so that the surface side becomes concave due to heat shrinkage in the plasticizing region. There is a problem of end up.

  From such a viewpoint, it is an object of the present invention to provide a method of manufacturing a heat transfer plate that can easily friction stir weld a deep position of the heat transfer plate and improve the flatness of the heat transfer plate. And Further, the present invention provides a friction stirrer that can easily perform friction stir welding and improve the flatness of the joined metal members even when the overlapped portion of the overlapped metal members is at a deep position. It is an object to provide a bonding method.

In order to solve such a problem, the present invention provides a lid groove closing step of inserting a lid plate into a lid groove formed around a concave groove opening on the surface of the base member, a side wall of the lid groove, A main joining process in which frictional stirring is performed by relatively moving a rotating tool for main welding provided with a stirring pin along the abutting portion with the side surface of the cover plate, and friction stirring is performed from the back surface of the base member using the rotating tool for correction. The lid plate has a rectangular cross section that is substantially the same as the cross section of the lid groove of the base member, and the stirring pin of the rotary tool for main joining is tapered as it is separated from the base end portion. A spiral groove is formed on the outer peripheral surface of the stirring pin, and when the spiral groove is formed in a counterclockwise direction from the top to the bottom, the main welding rotary tool is rotated to the right. , Right as you walk down the spiral groove When forming the Ri, the causes of this joining rotation tool is rotated counterclockwise, in the main bonding step, inserting the stirring pin which rotates in the butting portion, only the stirring pin to the base member and the cover plate Friction stirring is performed in a contact state.

Further, the present invention provides a heat medium tube insertion step of inserting a heat medium tube into a concave groove formed in a bottom surface of a cover groove that opens on the surface of the base member, and a lid for inserting a cover plate into the cover groove. A groove closing step, a main joining step in which friction rotating stirring is performed by relatively moving a rotary tool for main welding provided with a stirring pin along the abutting portion between the side wall of the lid groove and the side surface of the lid plate, and rotation for correction Correction step of performing friction stir from the back surface of the base member using a tool, and the lid plate has a rectangular cross section substantially the same as the cross section of the lid groove of the base member, and the rotation tool for the main joining The stirring pin is tapered as it is separated from the base end portion, and a spiral groove is engraved on the outer peripheral surface of the stirring pin, and the spiral groove is formed in a counterclockwise direction from the top to the bottom. Rotate the main rotating tool to the right and rotate the spiral groove When forming the upper clockwise toward the bottom, the present joining rotation tool is rotated counterclockwise, in the main bonding step, inserting the stirring pin which rotates in the butting portion, the only the stirring pin Friction stirring is performed in a state where the base member and the lid plate are in contact with each other.

According to this method, since only the stirring pin of the main rotating tool for contact comes into contact with the base member and the cover plate, the base member and the cover plate to be bonded and the main bonding rotation as compared with the conventional manufacturing method. Friction with the tool can be reduced, and the load on the friction stirrer can be reduced. That is, according to the present invention, since the load on the friction stirrer can be reduced, the friction stir welding can be easily performed at a deep position of the abutting portion. Thereby, a flow path can be easily formed in the deep position of a heat exchanger plate. Moreover, since friction stir can be carried out to the deep position of a butt | matching part, the water-tightness and airtightness of a heat exchanger plate can be improved. Furthermore, by performing frictional stirring on the back surface of the base member, heat shrinkage also occurs on the back surface side of the base member, so that the flatness of the heat transfer plate can be improved. Further, by setting the spiral groove in this manner, the plastic fluidized metal at the time of frictional stirring is guided to the tip side of the stirring pin by the spiral groove. Thereby, the quantity of the metal which overflows to the exterior of a to-be-joined metal member (a base member and a cover board) can be decreased.

  Moreover, it is preferable to include the temporary joining process of temporarily joining the said abutting part before the said main joining process. According to this manufacturing method, it is possible to prevent the opening of the butt portion during the main joining step.

In addition, the present invention provides a closing step in which a cover plate having a flat front surface and a back surface is overlapped on the surface of the base member so as to cover a concave groove or a recess opened on the surface of the base member , and stirring from the surface of the cover plate. A main joining step in which a rotational tool for main joining provided with a pin is inserted, and the rotational tool for main joining is relatively moved along the overlapping portion between the front surface of the base member and the back surface of the lid plate; A correction step of performing frictional stirring from the back surface of the base member using, the stirring pin of the main welding rotary tool is tapered as it is separated from the base end, and the outer periphery of the stirring pin A spiral groove is engraved on the surface, and when the spiral groove is formed counterclockwise as it goes from top to bottom, the main welding rotary tool is rotated clockwise, and the spiral groove is directed from top to bottom. As it turns clockwise If you, the present joining rotation tool is rotated counterclockwise, the present bonding process, both of the cover plate only the stirring pin and the base member, or the polymerization being in contact only with the cover plate It is characterized by carrying out friction stirring of the part.

The present invention also provides a closing step in which a cover plate having a flat front surface and a back surface is overlapped on the surface of the base member so as to cover a concave groove or a recess opened on the surface of the base member, and stirring from the back surface of the base member. A main joining step in which a rotational tool for main joining provided with a pin is inserted, and the rotational tool for main joining is relatively moved along the overlapping portion between the front surface of the base member and the back surface of the lid plate; A correction step of performing frictional stirring from the surface of the lid plate using, the stirring pin of the rotary tool for main joining is tapered as it is separated from the base end, and the outer periphery of the stirring pin A spiral groove is engraved on the surface, and when the spiral groove is formed counterclockwise as it goes from top to bottom, the main welding rotary tool is rotated clockwise, and the spiral groove is directed from top to bottom. As it turns clockwise If you, the present joining rotation tool is rotated counterclockwise, the present bonding process, both of the cover plate only the stirring pin and the base member, or the polymerization being in contact only with the base member It is characterized by carrying out friction stirring of the part.

According to this method, only the stirring pin of the main welding rotary tool comes into contact with the base member, the cover plate, or both the base member and the cover plate. Friction with the rotary tool can be reduced, and the load applied to the friction stirrer 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. Thereby, a flow path can be easily formed also in the deep position of a heat exchanger plate. Furthermore, heat shrinkage is also generated on the back surface side of the base member by performing friction stirring on the back surface of the base member, or heat shrinkage is also performed on the surface side of the cover plate by performing friction stirring on the surface of the cover plate. By making it generate | occur | produce, the flatness of a heat exchanger plate can be improved. Further, by setting the spiral groove in this manner, the plastic fluidized metal at the time of frictional stirring is guided to the tip side of the stirring pin by the spiral groove. Thereby, the quantity of the metal which overflows to the exterior of a to-be-joined metal member (a base member and a cover board) can be decreased.

  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 manufacturing 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 for main joining after completion | finish of the said main joining process. According to this manufacturing method, the heat transfer plate can be molded neatly.

Further, the present invention is a method for manufacturing a composite plate in which a flow path is not provided in an interior for joining two metal members using a main joining rotary tool having a stirring pin, and the surface of one of the metal members Overlaying the back surface of the other metal member to form an overlapped portion , inserting the rotation tool for main joining rotated from the surface of the other metal member, and inserting the surface of the one metal member A main joining step of relatively moving the main welding rotary tool along the overlap portion between the first metal member and the back surface of the other metal member, and a correction for friction stirring from the back surface of the one metal member using the correction rotary tool. seen including a step, wherein said stirring pin of the joining rotation tool is tapered as away from the proximal end, the outer peripheral surface of the stirring pin is helical groove is engraved, the From the top to the bottom of the spiral groove In the case of forming counterclockwise, the main welding rotation tool is rotated to the right, and in the case of forming the spiral groove clockwise from top to bottom, the main welding rotation tool is rotated to the left, In the main joining step, friction stir of the overlapping portion is performed in a state where only the stirring pin is in contact with both the one metal member and the other metal member or only the other metal member. And

According to this method, since only the stirring pin of the main rotating tool for contact comes into contact with both or one of the metal members, the friction between the main rotating tool and the metal member compared to the conventional manufacturing method. Can be reduced, and the load applied to the friction stirrer 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. Furthermore, by performing frictional stirring on the back surface of one metal member, heat shrinkage also occurs on the back surface side of the one metal member, so that the flatness of the joined metal member can be improved. Further, by setting the spiral groove in this manner, the plastic fluidized metal at the time of frictional stirring is guided to the tip side of the stirring pin by the spiral groove. Thereby, the quantity of the metal which overflows to the exterior of a to-be-joined metal member can be decreased.

  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 for manufacturing a heat transfer plate according to the present invention, the abutting portion at a deep position can be easily friction stir welded and the flatness of the heat transfer plate can be enhanced. Further, according to the friction stir welding method according to the present invention, even when the overlapped portion of the overlapped metal members is at a deep position, the friction stir welding can be easily performed and the joined metal members can be flat. Can increase the sex.

(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 rotation tool for correction of this embodiment, (b) is the schematic cross section which showed the joining form of the rotation tool for correction. It is a figure which shows the heat exchanger plate which concerns on 1st embodiment of this invention, Comprising: (a) is a perspective view, (b) is II sectional drawing of (a). It is a figure which shows the heat exchanger plate which concerns on 1st embodiment, Comprising: (a) shows an exploded perspective view, (b) shows principal part sectional drawing. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, Comprising: (a) shows a groove | channel formation process, (b) shows the pipe | tube insertion process for heat media, (c) is cover groove | channel obstruction | occlusion. A process is shown. It is a perspective view which shows after the cover groove | channel obstruction | occlusion process of the manufacturing method of the heat exchanger plate which concerns on 1st embodiment. (A)-(c) is the top view which showed this joining process in steps in the manufacturing method of the heat exchanger plate which concerns on 1st embodiment. In the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, it is the figure which showed after performing this joining process, Comprising: (a) is a perspective view, (b) is the line which connects the point c and the point f FIG. In the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, (a) is the perspective view which showed the correction process, (b) is the top view which showed the correction process. In the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, (a) is sectional drawing which shows this joining process, (b) is sectional drawing which shows a correction process. It is a perspective view which shows the heat exchanger plate which concerns on 2nd embodiment. It is a disassembled perspective view of the heat exchanger plate which concerns on 2nd embodiment. In the manufacturing method of the heat exchanger plate which concerns on 2nd embodiment, (a) shows a temporary joining process, (b) shows this joining process. In the modified example which concerns on 2nd embodiment, (a) shows a temporary joining process, (b) shows this joining process. (A) shows sectional drawing of the friction stir welding method which concerns on 3rd embodiment, (b) shows the modification of the friction stir welding method which concerns on 3rd embodiment. It is a top view which shows the modification of a correction process, Comprising: (a) shows a 1st modification, (b) shows a 2nd modification, (c) shows a 3rd modification, (d) is A 4th modification is shown, (e) shows a 5th modification, (f) shows a 6th modification.

[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 straightening rotary tool used in this 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 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 10 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 <b> 1 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 correction rotating tool G includes a shoulder portion G1 and a stirring pin G2. The straightening rotary tool G is made of, for example, tool steel. The straightening rotary tool G is smaller than the main joining rotary tool F. 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. 2 (b), when friction stir welding is performed using the correction rotating tool G, the rotated stirring pin G2 and the lower end of the shoulder portion G1 are inserted and moved into the metal member to be joined. . A plasticized region W <b> 2 is formed on the movement locus of the correction rotary tool G by hardening of the friction-stirred metal. In the straightening rotary tool G, the heat input amount during frictional stirring of the straightening rotary tool G in FIG. 2B is smaller than the heat input amount of frictional stirring in the main rotating tool F in FIG. It is supposed to be.

  Next, the heat transfer plate of this embodiment will be described. As shown to (a) and (b) of FIG. 3, the heat exchanger plate 1 is mainly comprised by the base member 2 of the plate | board thickness of the planar view rectangle, the cover plate 10, and the pipe | tube 20 for heat media. Yes. The abutting portions J1 and J2 between the base member 2 and the cover plate 10 are joined by friction stirring.

  The base member 2 serves to transmit the heat of the heat medium flowing through the heat medium pipe 20 to the outside, or to play a role of transferring external heat to the heat medium flowing through the heat medium pipe 20. As shown in FIGS. 4A and 4B, the base member 2 is a rectangular parallelepiped having a square shape in plan view. The base member 2 is made of a metal material that can be frictionally stirred, such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy. A cover groove 6 is formed in the surface Za of the base member 2, and a groove 8 narrower than the cover groove 6 is formed in the center of the bottom surface of the cover groove 6.

  The lid groove 6 is a portion where the lid plate 10 is disposed, and is continuously formed in a substantially horseshoe shape in plan view with a certain width and depth. The lid groove 6 has a rectangular shape in sectional view, and includes side walls 6 a and 6 b that rise vertically from the bottom surface 6 c of the lid groove 6.

  The concave groove 8 is a portion into which the heat medium pipe 20 is inserted, and is formed over the entire length of the lid groove 6 at the central portion of the bottom surface 6 c of the lid groove 6. The concave groove 8 is a U-shaped groove with an upper opening, and a semicircular bottom surface 7 is formed at the lower end. The width of the opening of the concave groove 8 is substantially equal to the diameter of the bottom surface 7.

As shown in FIGS. 4A and 4B, the heat medium pipe 20 is a cylindrical pipe having a hollow portion 18 having a circular cross-sectional view. In the present embodiment, the heat medium pipe 20 is made of copper and has a horseshoe shape in plan view. Since the outer diameter of the heat medium pipe 20 is formed substantially equal to the width of the groove 8 and the depth of the groove 8, if the heat medium pipe 20 is disposed in the groove 8, the heat medium pipe 20 The lower half and the bottom surface 7 of the groove 8 are in surface contact, and the upper end of the heat medium pipe 20 is in contact with the lower surface 12 of the lid plate 10.
In the present embodiment, a microheater is inserted into the heat medium pipe 20, but for example, a heat medium such as cooling water, cooling gas, high-temperature liquid, or high-temperature gas is circulated to circulate the heat medium. The heat may be transmitted to the base member 2 and the cover plate 10 or the heat of the base member 2 and the cover plate 10 to the heat medium.

  In the present embodiment, the heat medium pipe 20 is circular in cross section, but may be square in cross section. Moreover, although the copper pipe is used for the heat medium pipe 20 in this embodiment, a pipe made of another material may be used. Further, the heat medium pipe 20 is not necessarily provided, and the heat medium may flow directly into the concave groove 8.

  As shown in FIGS. 4A and 4B, the lid plate 10 has an upper surface 11, a lower surface 12, a side surface 13 a, and a side surface 13 b that form substantially the same rectangular cross section as the cross section of the lid groove 6 of the base member 2. And it is formed in a substantially horseshoe shape in plan view. In this embodiment, the lid plate 10 is formed of the same material as that of the base member 2. The thickness of the lid plate 10 is substantially equal to the depth of the lid groove 6. Further, since the width of the lid plate 10 is formed substantially equal to the groove width of the lid groove 6, when the lid plate 10 is disposed in the lid groove 6, the side surfaces 13 a and 13 b of the lid plate 10 are The side walls 6a and 6b are in surface contact with each other or face each other with a fine gap.

  In the present embodiment, the groove 8 and the lower half of the heat medium pipe 20 are brought into surface contact, and the upper end of the heat medium pipe 20 and the lower surface 12 of the cover plate 10 are brought into contact. It is not limited to. Further, in the present embodiment, the lid groove 6, the concave groove 8, the lid plate 10, and the heat medium pipe 20 are formed so as to have a horseshoe shape in a plan view, but are not limited thereto. What is necessary is just to design suitably according to the use of.

  Next, a method for manufacturing the heat transfer plate 1 will be described. The manufacturing method of the heat transfer plate 1 according to the present embodiment includes (1) groove forming step, (2) heat medium tube inserting step, (3) lid groove closing step, (4) main joining step, and (5) correction. Process, (6) An annealing process is included.

(1) Groove Forming Step In the groove forming step, the cover groove 6 and the concave groove 8 are formed with a predetermined width and depth on the surface Za of the base member 2 as shown in FIG. The groove forming step is performed by cutting using, for example, a known end mill.

(2) Heat medium tube insertion step In the heat medium tube insertion step, as shown in FIG. 5B, the heat medium tube 20 is inserted into the recessed groove 8 formed in the groove formation step.

(3) Lid groove closing process In the lid groove closing process, as shown in FIGS. 5B and 5C, the lid plate 10 is disposed in the lid groove 6 to close the lid groove 6. Here, in the abutting surface of the lid groove 6 and the lid plate 10, a portion abutted by the side wall 6 a of the lid groove 6 and the side surface 13 a of the lid plate 10 is defined as a butting portion J <b> 1. A portion that is abutted with the side surface 13b of 10 is referred to as a butted portion J2.

(4) Main joining process In a joining process, friction stirring is performed using the rotation tool F for joining along the abutting part J1, J2. In the present embodiment, the joining step includes a first main joining step in which the abutting portion J1 is frictionally stirred and a second main joining step in which the abutting portion J2 is frictionally stirred.

In the first main joining step, as shown in FIGS. 6 and 7 (a) and (b), the main joining rotary tool F is used along the abutting portion J1 between the base member 2 and the cover plate 10. Friction stirring is performed. First, the start position _SM1 is set at an arbitrary position on the surface Za of the base member 2, and the stirring pin F2 of the main welding rotary tool F is inserted into the base member 2. In this embodiment, the start position S _M1 is set in the vicinity of the outer edge of the base member 2 and in the vicinity of the abutting portion J1. Then, the main welding rotary tool F is relatively moved toward the start point s1 of the abutting portion J1. Further, as shown in FIG. 7A, when the starting point s1 is reached, the main welding rotary tool F is moved as it is along the abutting portion J1 without being detached. At this time, friction stirring is performed in a state where only the stirring pin F <b> 2 (see FIG. 1A) of the main rotating tool F for welding is in contact with the base member 2 and the cover plate 10.

When the main welding rotary tool F reaches the end point e1 of the abutting portion J1, the main welding rotary tool F is moved to the start position _SM1 as it is, and the main welding rotation is performed at the end position E _M1 set at an arbitrary position. Remove Tool F. The start position S _M1 , the start point s 1, the end position E _M1, and the end point e 1 are not limited to the positions of the present embodiment, but are in the vicinity of the outer edge of the base member 2 and in the vicinity of the abutting portion J 1. Preferably there is.

Next, in the second joining step, as shown in FIGS. 7B and 7C, friction stirring is performed along the abutting portion J <b> 2 between the base member 2 and the lid plate 10. First, the start position _SM2 is set at an arbitrary point h on the surface Za of the base member 2, and the stirring pin F2 of the main welding rotary tool F is inserted into the base member 2. Next, the main welding rotary tool F is relatively moved toward the start point s2 of the abutting portion J2. Next, when the starting point s2 is reached, the main rotating tool F is moved along the abutting portion J2 without being detached. At this time, friction stirring is performed in a state where only the stirring pin F <b> 2 (see FIG. 1A) of the main rotating tool F for welding is in contact with the base member 2 and the cover plate 10.

When the main welding rotary tool F reaches the end point e2 of the abutting portion J2, the main welding rotary tool F is moved to the point f side as it is, and the main welding rotary tool F is moved to the end position E _M2 set at the point f. Let go. The start position S _M2 and the end position E _M2 are not limited to the positions in the present embodiment, but are preferably corners of the outer edge of the base member 2. Thus, if a loophole in the end position E _M2 remaining can be removed by cutting the corner.

  As shown in FIG. 7C, the plasticizing region W1 (W1a, W1b) is formed along the abutting portion J1 and the abutting portion J2 by the main joining process. As a result, the heat medium pipe 20 is sealed by the base member 2 and the cover plate 10. The insertion depth of the stirring pin F2 in the main joining process may be set as appropriate, but in this embodiment, the insertion is performed up to the position where the tip of the stirring pin F2 reaches the bottom surface 6c of the lid groove 6 (see FIG. 3B). To do. Thereby, the whole of the abutting part J1 and the abutting part J2 in the depth direction can be frictionally stirred.

  Here, FIG. 8 is the figure which showed after performing this joining process in the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, (a) is a perspective view, (b) is a point. It is sectional drawing of the line which connects c and the point f. Plasticizing regions W1 and W1 are formed in the heat transfer plate 1 by the main joining process. Since the plasticized region W1 shrinks due to thermal contraction, a compressive stress acts from the corner side of the base member 2 toward the center side on the surface Za side of the heat transfer plate 1. Thereby, the heat transfer plate 1 may be warped so that the surface Za side is concave. In particular, among the points a to j shown on the surface Za of the heat transfer plate 1, at the points a, c, f, and h related to the four corners of the heat transfer plate 1, the influence of the warp tends to be noticeable. In addition, the point j shows the center point of the heat exchanger plate 1.

(5) Straightening Step In the straightening step, friction stir is performed from the back surface Zb of the base member 2 using the straightening rotary tool G. The correction process is a process performed to eliminate the warp (deflection) generated in the joining process. In the present embodiment, the straightening process includes a tab material arranging process for arranging the tab material, and a straightening friction stirring process for performing friction stirring on the back surface Zb of the base member 2.

  In the tab material arrangement step, as shown in FIG. 9A, a tab material T for setting a start position and an end position of a correction friction stirring step described later is arranged. In this embodiment, the tab material T has a rectangular parallelepiped shape and is made of the same material as the base member 2. The tab member T is brought into contact with the side surface Zc so as to cover part of the side surface Zc of the base member 2. Moreover, the tab material T temporarily joins both the side surfaces of the tab material T and the side surface Zc of the base member 2 by welding. The surface of the tab material T is preferably formed flush with the back surface Zb of the base member 2.

  In the correction friction agitation step, friction agitation is performed on the back surface Zb of the base member 2 by using the correction rotation tool G as shown in FIGS. In this embodiment, the route of the straightening friction stirring step is set so as to surround the center point j 'and the plasticized region W2 formed by the straightening friction stirring step is radial with respect to the center point j'. The points a ′, b ′,... Are points corresponding to the back surface Zb side of the points a, b,... (See FIG. 8) on the surface Za side of the base member 2.

In the straightening friction stirring step, as shown in FIG. 9A, first, a start position _SM2 is set on the surface of the tab material T, and the stirring pin G2 of the straightening rotary tool G is inserted into the tab material T. When a part of the shoulder portion G1 of the correction rotary tool G comes into contact with the tab material T, the correction rotary tool G is relatively moved toward the base member 2. And it becomes convex in the vicinity of the point f ′, the point a ′, the point c ′, and the point h ′ on the back surface Zb of the base member 2 and is concave in the vicinity of the point g ′, the point d ′, the point b ′, and the point e ′. Friction stirring is performed by relatively moving the correction rotary tool G so that That is, as shown in FIG. 9B, the plasticized region W <b> 2 is formed so as to be line symmetric with respect to the center line (one-dot chain line) of the base member 2. In the present embodiment, a start position S _M2 and an end position E _M2 are provided on the tab material T, and friction stirring is performed in the manner of one stroke. Thereby, friction stirring can be performed efficiently. When the straightening friction stirring step is completed, the tab material T is cut off.

  In the present embodiment, the locus of the correction rotary tool G, that is, the shape of the plasticized region W2 is formed so as to surround the center point j ′ and to be substantially radial with respect to the center point j ′. However, the present invention is not limited to this. Variations of the locus of the correction rotating tool G will be described later.

  In the present embodiment, the length of the trajectory of the straightening rotary tool G (the length of the plasticizing region W2) is longer than the length of the trajectory of the main rotating tool F for bonding (the length of the plasticizing region W1). It is formed to be shorter. That is, the processing degree of the correction rotary tool G in the correction process is set to be smaller than the processing degree of the main rotation tool F in the main joining process. Thereby, the flatness of the heat exchanger plate 1 can be improved. Here, the workability indicates the volume amount of the plasticized region formed by friction stirring. Further, in the present embodiment, the tab material is disposed in the correction process, but the tab material may not be provided depending on the friction stirring route in the correction friction stirring process.

(6) Annealing Step In the annealing step, the internal stress of the heat transfer plate 1 is removed by annealing the heat transfer plate 1. In the present embodiment, the heat medium pipe 20 is annealed, for example, by energizing a micro heater. Thereby, the internal stress of the heat exchanger plate 1 can be removed, and the deformation | transformation at the time of use of the heat exchanger plate 1 can be prevented.

  According to the manufacturing method according to the present embodiment described above, only the stirring pin F2 in the main rotating tool F for welding comes into contact with the base member 2 and the cover plate 10, and therefore, compared with the conventional manufacturing method. Friction between the base member 2 and the cover plate 10 to be joined and the main joining rotary tool F can be reduced, and the load applied to the friction stirrer can be reduced. That is, according to this embodiment, since the load on the friction stirrer can be reduced, the deep positions of the abutting portions J1 and J2 can be easily friction stir welded. Thereby, a flow path can be easily formed in the deep position of the heat exchanger plate 1. Moreover, since friction stir can be carried out to the deep position of the butt | matching parts J1 and J2, the watertightness and airtightness of the heat exchanger plate 1 can be improved, and joint strength can be raised.

  Further, even if the heat transfer plate 1 is bent due to the heat shrinkage in the main joining step, the warp generated on the surface Za is eliminated by performing frictional stirring on the back surface Zb of the base member 2. 1 flatness can be improved. That is, since the plasticized region W2 formed on the back surface Zb of the base member 2 contracts due to thermal contraction, the compressive stress is applied from each corner side of the base member 2 toward the center side on the back surface Zb side of the heat transfer plate 1. Works. Thereby, the curvature formed by this joining process is eliminated, and the flatness of the heat exchanger plate 1 can be improved.

  Here, in this joining process, as shown to (a) of FIG. 10, friction stirring is performed in the state which the surface of the mount frame K and the back surface Zb of the base member 2 contacted. Therefore, the frictional heat generated during the main joining process is removed from the entire back surface Zb of the base member 2 as indicated by an arrow Q.

  However, after the main joining step, the back surface Zb side of the base member 2 is along a convex shape, and therefore, when the base member 2 is placed on the gantry K with the base member 2 turned upside down as shown in FIG. The surface Za of the base member 2 and the surface of the gantry K are in contact with each other only at the four corners (four points) of the base member 2. Therefore, when the straightening process is performed, heat is extracted only at the four corners of the base member 2 as indicated by the arrow Q in FIG. 10B. Therefore, the heat removal efficiency is lower than the main joining process, and the base member 2 and the cover plate are removed. Heat is likely to remain in the interior of 10.

  Therefore, if the degree of processing in the straightening process is set to be equal to the degree of processing in the main joining process, the heat remaining in the base member 2 and the cover plate 10 is larger in the straightening process, and the back surface Zb of the base member 2 is concave. There is a risk of warping. However, according to the present embodiment, since the degree of processing in the correction process is set to be smaller than the degree of processing in the main joining process, it is possible to prevent warping such that the back surface Zb is concave. Thereby, the flatness of the heat exchanger plate 1 can be improved.

  Moreover, since the correction | amendment process in this embodiment moves the rotation tool G for correction | amendment in the way of one-stroke writing, work efficiency can be improved.

  While the first embodiment of the present invention has been described above, design changes can be made as appropriate without departing from the spirit of the present invention. In the first embodiment, the heat medium pipe 20 is inserted, but the heat medium pipe 20 may be omitted. The modification of the first embodiment in this case includes (1) groove forming step, (2) lid groove closing step, (3) main joining step, (4) straightening step, and (5) annealing step. About each process, it is equivalent to 1st embodiment.

  Moreover, in the first embodiment and the modified example of the first embodiment, a temporary bonding step may be performed before the main bonding step. In the temporary joining step, friction stir welding is preliminarily performed on the abutting portions J1 and J2 using a small rotary tool. Thereby, the opening of the base member 2 and the cover plate 10 during the main joining step can be prevented.

  Further, in the first embodiment and the modification of the first embodiment, a burr cutting step of cutting off burrs generated on the base member 2 and the cover plate 10 may be performed after the main joining step and the correction step. Thereby, the heat exchanger plate 1 can be shape | molded neatly.

  In the first embodiment and the modification of the first embodiment, the correction process is performed using the correction rotary tool G, but the present invention is not limited to this. In the correction process, for example, the rotational tool F for main joining may be used, the insertion depth may be reduced, or the friction stirring route may be set short. Even if it is such a form, the flatness of the heat exchanger plate 1 can be improved.

  Further, in the main joining process, when performing friction stir welding, the lid groove 6 so that the plastic fluidized metal flows into the space surrounded by the concave groove 8, the lid plate 10 and the heat medium pipe 20. The widths of the concave groove 8 and the cover plate 10 may be set. Thereby, since the space | gap around the pipe | tube 20 for heat-medium is filled with a metal, heat conductivity can be improved more.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. As shown in FIG. 11, the manufacturing method of the heat transfer plate according to the second embodiment is mainly different from the first embodiment in that the base member 31 and the cover plate 32 are overlapped.

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

  As shown in FIG. 12, the preparation step is a step of preparing the base member 31 and the cover plate 32. The base member 31 and the cover plate 32 are plate-shaped metal members. In the preparation step, the groove 40 is formed on the surface 31 a of the base member 31. The cross-sectional shape and the planar shape of the concave groove 40 are not particularly limited, but in the present embodiment, both the sectional view and the planar view are formed in a U-shape.

  As shown in FIG. 13A, the ditch closing process (blocking process) is a process of placing the cover plate 32 on the surface 31 a of the base member 31 and covering the top of the ditch 40. In the recessed groove closing step, the surface 31a of the base member 31 and the back surface 32b of the cover plate 32 are overlapped to form the overlap portion J3.

  The temporary joining step is a step of performing preliminary joining to the overlapping portion J3. In the present embodiment, in the present embodiment, the temporary bonding rotary tool H is inserted from the side surfaces of the base member 31 and the cover plate 32, and the friction stir welding is performed on the overlapping portion J3. A plasticized region W0 is formed on the side surfaces of the base member 31 and the cover plate 32 by the temporary joining step.

  As shown in FIG. 13B, the main joining step is a step of performing friction stir welding on the overlapping portion J3 by using the main welding rotating tool F. In this embodiment, the front end of the stirring pin F <b> 2 of the rotary tool F for main joining is inserted into the base member 31 by being inserted vertically from the surface 32 a of the lid plate 32. Then, on both sides of the concave groove 40, the main welding rotary tool F is relatively moved along the concave groove 40. At this time, friction bonding is performed so that only the stirring pin F <b> 2 contacts the base member 31 and the cover plate 32.

  Next, in the correction step, the base member 31 and the cover plate 32 are turned over, and friction stirring is performed from the back surface 31 b side of the base member 31 using the correction rotary tool G. Since the correction process is the same as in the first embodiment, detailed description thereof is omitted.

  Also in the second embodiment described above, only the stirring pin F2 of the main welding rotary tool F comes into contact with the base member 31 and the cover plate 32, so that the main welding rotary tool is compared with the conventional manufacturing method. Friction with F can be reduced, and the load applied to the friction stirrer can be reduced. That is, according to the present embodiment, since the load on the friction stirrer can be reduced, the overlapping portion J3 located at a deep position can be easily friction stir welded. Thereby, a flow path can be easily formed also in the deep position of 1 A of heat exchanger plates.

  Further, by performing frictional stirring on the back surface 31b of the base member 31 and causing thermal contraction on the back surface 31b side of the base member 31, the flatness of the heat transfer plate 1A can be enhanced.

  Further, by performing the temporary bonding step before the main bonding step, it is possible to prevent the base member 31 and the lid plate 32 from being opened during the main bonding step.

  Although the second embodiment of the present invention has been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, in the present embodiment, the stirring pin F2 is set so that the tip of the stirring pin F2 reaches the base member 31 in the main joining step, but the stirring pin F2 contacts only the cover plate 10 and at least the plasticized region W1 contacts the base member 31. You may set the insertion depth of the stirring pin F2 so that it may reach.

  In the main joining process of the second embodiment, the stirring pin F2 is inserted from the surface 32a of the lid plate 32 to perform the friction stir welding. However, the present invention is not limited to this. In the main joining process, the stirring pin F2 may be inserted from the back surface 31b of the base member 31, and the friction stir welding may be performed on the overlapping portion J3. In this case, the main joining process of inserting the stirring pin F2 from the back surface 31b of the base member 31 and performing the friction stir welding is performed, and the correction process is performed from the surface 32a of the cover plate 32. Even if it does in this way, there can exist an effect substantially equivalent to 2nd embodiment. Even in this case, in the main joining step, friction stirring may be performed in a state where only the stirring pin F2 is in contact with both the base member 31 and the cover plate 32 or only the base member 31.

[Modification of Second Embodiment]
Next, a modification of the second embodiment will be described. The method for manufacturing a heat transfer plate according to the modification of the second embodiment is different from the second embodiment in that a recess 41 having a large depression is formed in the base member 31.

  In the modification according to the second embodiment, a preparation process, a recess closing process, a temporary bonding process, a main bonding process, and a correction process are performed.

  As shown in FIG. 14A, the preparation process is a process for preparing the base member 31. A recess 41 is formed on the surface 31 a of the base member 31. The recess 41 is a recess that is sufficiently wider than the recess 40.

  The recess closing process (blocking process) is a process of placing the cover plate 32 on the surface 31 a of the base member 31 and covering the top of the recess 41. In the recess closing step, the front surface 31a of the base member 31 and the back surface 32b of the cover plate 32 are overlapped to form the overlapping portion J3. As shown in FIG. 14B, the provisional joining process, the main joining process, and the correction process are the same as those in the third embodiment, and thus detailed description thereof is omitted. Thereby, the heat exchanger plate 1B is formed.

  In the modification according to the second embodiment, substantially the same effect as that of the second embodiment can be obtained. Moreover, according to the modification of 2nd embodiment, even if it is a case where the recessed part 41 larger than the recessed groove 40 is provided and the cover plate 32 with a large plate | board thickness is mounted, the heat exchanger plate 1B is formed easily. be able to.

  In the present embodiment, the tip of the stirring pin F2 is set so as to be pushed into the position reaching the base member 31, but is set so as not to reach the base member 31, that is, only the stirring pin F2 and the cover plate 32 are provided. You may set so that it may push to the position which contacts and the superposition | polymerization part J3 may be frictionally stirred. In such a case, the base member 31 and the cover plate 32 are plastically fluidized by the frictional heat generated by the contact between the stirring pin F2 and the cover plate 32, thereby joining the overlapping portion J3.

  Further, in the present embodiment, the main welding rotary tool F is inserted from the front surface 32a of the cover plate 32, but the main welding rotary tool F is inserted from the back surface 31b of the base member 31 to friction stir the overlapping portion J3. You may do it. Even in this case, the agitation pin F2 may be pushed to a position where it contacts both the base member 31 and the cover plate 32, or may be pushed to a position where only the base member 31 is contacted, and set so as to be frictionally stirred. May be.

  Moreover, you may perform the burr cutting process which removes the burr | flash which generate | occur | produced at each process after the temporary joining process, the main joining process, and the correction process in 2nd embodiment and the modification of 2nd embodiment.

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

  In the friction stir welding method according to the third embodiment, a preparation process, an overlaying process (polymerization part forming process), a temporary bonding process, a main bonding process, and a correction process are performed.

  As shown to (a) of FIG. 15, a preparation process is a process of preparing the metal members 51 and 52. As shown in FIG. The metal members 51 and 52 are plate-shaped metal members. The types of the metal members 51 and 52 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 51 and 52. In the overlapping step, the overlap portion J4 is formed by overlapping the back surface 52b of the metal member 52 on the front surface 51a of the metal member 51.

  The temporary bonding step is a step of performing preliminary bonding to the overlapping portion J4. In the present embodiment, in the present embodiment, the temporary bonding rotary tool H is inserted from the side surfaces of the metal members 51 and 52, and the friction stir welding is performed on the overlapping portion J4. After the temporary joining step, a plasticized region W0 is formed on the side surfaces of the metal members 51 and 52.

  The main joining step is a step of performing friction stir welding on the overlapping portion J4 by using the main welding rotating tool F. In the present embodiment, the main welding rotary tool F is inserted vertically from the surface 52 a of the metal member 52, and the tip of the stirring pin F <b> 2 is set to enter the metal member 51. Moreover, in this joining process, while setting only so that the stirring pin F2 may contact the metal members 51 and 52, friction stirring is performed in the state which does not contact the connection part F1 with the metal member 52. FIG.

  In the correction process, the metal members 51 and 52 are turned over, and for example, the rotation tool G for correction is inserted into the back surface 51b of the metal member 51 to perform friction stirring. The correction process is equivalent to the first embodiment. Thereby, the composite plate 1C is formed.

  According to the friction stir welding method according to the third embodiment, the composite plate 1 </ b> C that does not have a flow path therein is easily formed. In particular, even when the thickness of the metal member 52 is large and the overlapping portion J4 is located at a deep position, only the stirring pin F2 is set so as to contact the metal members 51 and 52. Compared with this manufacturing method, the friction between the metal members 51 and 52 and the main welding rotary tool F can be reduced, and the load applied to the friction stirrer can be reduced. Thereby, even if it is a case where the superposition | polymerization part J4 exists in a deep position, friction stir welding can be performed easily.

  Further, the flatness of the composite plate 1C can be improved by performing the correction process. Moreover, by performing a temporary joining process, when performing this joining process, the opening between the metal members 51 and 52 can be prevented.

  Further, as shown in FIG. 15B, when the main joining process is performed, the tip of the stirring pin F2 is prevented from reaching the metal member 51, that is, the stirring pin F2 is in contact with only the metal member 52. Friction stirring may be performed by setting as described above. In such a case, the metal members 51 and 52 can be joined to each other by bringing the plasticized region W1 and the overlapping portion J4 into contact with each other. That is, the superposed portion J4 can be joined by plastically fluidizing the metal members 51 and 52 by the frictional heat generated by the contact between the stirring pin F2 and the metal member 52.

  Moreover, after performing the temporary joining process, the main joining process, and the correction process, a burr cutting process for cutting off burrs generated in each process may be performed.

[Modification of correction process]
The route of friction stirring related to the correction process is not limited to the form described in the first embodiment, and the following form may be used. FIG. 16 is a plan view of the back side of the heat transfer plate, where (a) shows a first modification, (b) shows a second modification, (c) shows a third modification, (D) shows a 4th modification, (e) shows a 5th modification, (f) shows a 6th modification.

  16A and 16B, the trajectory (plasticization region W2) of the correction rotary tool of the first modification and the second modification each surrounds the center point j ′ of the base member 2. It is formed. The first modification is formed so as to be similar to the outer shape of the base member 2. Moreover, you may form in a grid | lattice form like the 2nd modification shown in FIG.16 (b).

  The trajectories (plasticization regions W2) of the correction rotary tools of the third and fourth modifications shown in FIGS. 16C and 16D both pass through the center point j ′ of the base member 2. It is formed so that it may become radial. The third modification shown in FIG. 16C includes a plurality of loops having a center point j as a start point and an end point, and is formed so as to be point-symmetric with respect to the center point j ′. Moreover, since the 3rd modification can be formed in the way of one-stroke writing, work efficiency can be improved. The fourth modified example shown in FIG. 16D is formed so as to pass through the center point j ′ and be parallel to the diagonal line of the base member 2.

  The trajectories (plasticization regions W2) of the correction rotating tools of the fifth and sixth modifications shown in FIGS. 16 (e) and (f) are the same as the regions divided by straight lines passing through the central point j ′. The four trajectories of the shape are formed independently, and the trajectories that are diagonally opposed across the central point j ′ are point-symmetric. The four trajectories may have any shape as long as they have the same shape. In the modification of the correction process, the first embodiment has been described as an example. However, the modification of the correction process can be applied to the second and third embodiments.

DESCRIPTION OF SYMBOLS 1 Heat-transfer plate 2 Base member 6 Lid groove 8 Recessed groove 10 Lid plate 20 Heat medium pipe 31 Base member 32 Lid plate 51 Metal member 52 Metal member F Rotary tool for main joining F2 Stirring pin G Rotary tool for correction J1 Butting part J2 Butting part J3 Superposition part J4 Superposition part W1 Plasticization area W2 Plasticization area

Claims (10)

A lid groove closing step of inserting a lid plate into the lid groove formed around the concave groove opened on the surface of the base member;
A main joining step in which friction stir is performed by relatively moving a rotary tool for main joining provided with a stirring pin along the abutting portion between the side wall of the lid groove and the side surface of the lid plate;
A correction step of performing frictional stirring from the back surface of the base member using a correction rotating tool,
The lid plate has a rectangular cross section substantially the same as the cross section of the lid groove of the base member;
The stirring pin of the rotating tool for main joining is tapered as it is separated from the base end portion, and a spiral groove is formed on the outer peripheral surface of the stirring pin, and the spiral groove is arranged from the top to the bottom. When forming counterclockwise as it goes, rotate the main welding rotary tool to the right, and when forming the spiral groove clockwise from top to bottom, rotate the main welding rotary tool to the left,
In the main joining step, the rotated stirring pin is inserted into the abutting portion, and friction stirring is performed in a state where only the stirring pin is in contact with the base member and the lid plate. Production method. A heat medium tube insertion step of inserting the heat medium tube into the groove formed in the bottom surface of the lid groove opened on the surface of the base member;
A lid groove closing step of inserting a lid plate into the lid groove;
A main joining step in which friction stir is performed by relatively moving a rotary tool for main joining provided with a stirring pin along the abutting portion between the side wall of the lid groove and the side surface of the lid plate;
A correction step of performing frictional stirring from the back surface of the base member using a correction rotating tool,
The lid plate has a rectangular cross section substantially the same as the cross section of the lid groove of the base member;
The stirring pin of the rotating tool for main joining is tapered as it is separated from the base end portion, and a spiral groove is formed on the outer peripheral surface of the stirring pin, and the spiral groove is arranged from the top to the bottom. When forming counterclockwise as it goes, rotate the main welding rotary tool to the right, and when forming the spiral groove clockwise from top to bottom, rotate the main welding rotary tool to the left,
In the main joining step, the rotated stirring pin is inserted into the abutting portion, and friction stirring is performed in a state where only the stirring pin is in contact with the base member and the lid plate. Production method.   The method for manufacturing a heat transfer plate according to claim 1, further comprising a temporary bonding step of temporarily bonding the abutting portions before the main bonding step. A clogging step in which a cover plate having a flat front surface and a back surface is overlaid on the surface of the base member so as to cover the concave groove or the concave portion opened on the surface of the base member;
A main joining rotary tool having a stirring pin is inserted from the surface of the lid plate, and the main joining rotary tool is relatively moved along the overlapping portion between the surface of the base member and the back surface of the lid plate. Process,
A correction step of performing frictional stirring from the back surface of the base member using a correction rotating tool,
The stirring pin of the rotating tool for main joining is tapered as it is separated from the base end portion, and a spiral groove is formed on the outer peripheral surface of the stirring pin, and the spiral groove is arranged from the top to the bottom. When forming counterclockwise as it goes, rotate the main welding rotary tool to the right, and when forming the spiral groove clockwise from top to bottom, rotate the main welding rotary tool to the left,
In the main joining step, the superposition part is frictionally stirred in a state where only the stirring pin is in contact with both the base member and the lid plate or only the lid plate. Production method. A clogging step in which a cover plate having a flat front surface and a back surface is overlaid on the surface of the base member so as to cover the concave groove or the concave portion opened on the surface of the base member;
A main joining rotary tool having a stirring pin is inserted from the back surface of the base member, and the main joining rotary tool is relatively moved along the overlapping portion between the surface of the base member and the back surface of the lid plate. Process,
A correction step of performing frictional stirring from the surface of the lid plate using a rotation tool for correction, and
The stirring pin of the rotating tool for main joining is tapered as it is separated from the base end portion, and a spiral groove is formed on the outer peripheral surface of the stirring pin, and the spiral groove is arranged from the top to the bottom. When forming counterclockwise as it goes, rotate the main welding rotary tool to the right, and when forming the spiral groove clockwise from top to bottom, rotate the main welding rotary tool to the left,
In the main joining step, the superposition part is frictionally stirred in a state where only the stirring pin is in contact with both the base member and the cover plate or only the base member. Production method.   The method for manufacturing a heat transfer plate according to claim 4, further comprising a temporary bonding step of temporarily bonding the overlapped portion before the main bonding step.   The transmission according to any one of claims 1 to 6, further comprising a burr cutting step of cutting a burr generated by frictional stirring of the rotary tool for main bonding after the main bonding step. Manufacturing method of hot plate. A method of manufacturing a composite plate in which a flow path is not provided in an interior for joining two metal members using a main joining 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;
The main welding rotary tool rotated from the surface of the other metal member is inserted, and the main welding rotary tool is inserted along the overlapping portion between the surface of the one metal member and the back surface of the other metal member. A main joining process for relative movement ;
A correction step of performing friction stir from the back of one of the metal member by using the orthodontic rotating tool, only including,
The stirring pin of the rotating tool for main joining is tapered as it is separated from the base end portion, and a spiral groove is formed on the outer peripheral surface of the stirring pin, and the spiral groove is arranged from the top to the bottom. When forming counterclockwise as it goes, rotate the main welding rotary tool to the right, and when forming the spiral groove clockwise from top to bottom, rotate the main welding rotary tool to the left,
In the main joining step, friction stir of the overlapping portion is performed in a state where only the stirring pin is in contact with both the one metal member and the other metal member or only the other metal member. The manufacturing method of the composite board which does not provide a flow path inside . The method for manufacturing a composite plate according to claim 8, further comprising a temporary bonding step of temporarily bonding the overlapped portion before the main bonding step. 10. The flow path is provided inside according to claim 8, further comprising a burr cutting step of cutting a burr generated by friction stirring of the main welding rotary tool after the main bonding step. No composite board manufacturing method.

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