WO2009104426A1 - Method of manufacturing heat transfer plate - Google Patents

Abstract

A method of manufacturing a heat transfer plate capable of easily manufacturing a heat transfer plate with high flatness by friction stirring. The method comprises a lid groove closing step of disposing lid plates at respective lid grooves formed around respective recess grooves opened in the front surface of a base member (2), a joining step of performing friction stirring by moving a rotary tool for joining along the abutting parts between the side walls of the lid grooves and the side surfaces of the lid plates, and a correction step of performing friction stirring by moving a rotary tool (G) for correction to the rear surface (Zb) side of the base member (2). The method is characterized in that the volumetric amount of the plasticized area formed by the correction step is smaller than the volumetric amount of the plasticized area formed by the joining step.

Description

Manufacturing method of heat transfer plate

The present invention relates to a method of manufacturing a heat transfer plate used for, for example, a heat exchanger, a heating device, a cooling device, or the like.

A heat transfer plate arranged in contact with or close to an object to be heat exchanged, heated or cooled is provided with a heat medium pipe for circulating a heat medium such as high-temperature liquid or cooling water through a base member as a main body. It is formed by insertion.

As a method for manufacturing such a heat transfer plate, for example, the method described in Document 1 is known. FIG. 28 is a cross-sectional view showing a heat transfer plate formed by the method for manufacturing a heat transfer plate according to Document 1. A heat transfer plate 100 according to Document 1 includes a base member 102 having a lid groove 106 having a rectangular cross-sectional view opening on the surface and a concave groove 108 opening on the bottom surface of the lid groove 106, and a heat medium inserted into the concave groove 108. A working tube 116 and a lid plate 110 inserted into the lid groove 106 are provided. The heat transfer plate 100 is formed by performing friction stir welding along the respective abutting portions J and J where the both side walls of the lid groove 106 and the both side surfaces of the lid plate 110 are abutted. Accordingly, plasticized regions W and W are formed in the abutting portions J and J of the heat transfer plate 100, respectively.

Since the heat transfer plate 100 formed by the method of manufacturing a heat transfer plate according to Document 1 performs frictional stirring only from the surface side of the base member 102, when the plasticized regions W and W are contracted by thermal contraction, the heat transfer plate There was a problem that distortion occurred.

As a method for solving such a problem, Document 2 describes a method in which friction stir is performed after giving a predetermined downward warp to a metal member in advance in anticipation of the generated warp.

Further, as a method for solving such a problem, in Document 3, a strained metal member is fixed to a friction stirrer, a rotating tool is pressed against the strained portion of the metal member, and plastic flow is applied to the pressed portion. A method is described for performing distortion removal.

Reference 1. JP, 2004-314115, A Literature 2. JP 2001-87871 A Document 3. JP 2006-102777 A

However, according to the method according to Document 2, there is a problem that the work of forming a warp in advance on a metal member becomes complicated. Further, in the method according to Document 3, if the region where frictional stirring is performed is increased, heat shrinkage may occur on the surface subjected to frictional stirring, and a concave distortion may be generated on this surface. In some cases, the distortion of the metal member could not be resolved.
From such a viewpoint, an object of the present invention is to provide a method of manufacturing a heat transfer plate that can easily manufacture a heat transfer plate having high flatness by eliminating distortion of a metal member.

A manufacturing method of a heat transfer plate according to the present invention that solves such a problem includes a lid groove closing step of arranging a lid plate in a lid groove formed around a concave groove that opens on the surface side of the base member; Friction from the back surface side of the base member using a correction rotating tool, a bonding step of relatively moving the bonding rotary tool along the abutting portion between the side wall of the lid groove and the side surface of the lid plate, and friction stir A volumetric volume of the plasticized region formed by the straightening process is smaller than a volume volume of the plasticized area formed by the joining process.
According to the present invention, a heat medium tube insertion step of inserting a heat medium tube into a concave groove formed on the bottom surface of the cover groove opened on the surface side of the base member, and a cover plate is disposed in the cover groove. A lid groove closing step, a joining step of relatively moving the joining rotary tool along the abutting portion between the side wall of the lid groove and the side surface of the lid plate, and friction stir, and the base using the rotation tool for correction A correction step of performing frictional stirring from the back side of the member, wherein the volume amount of the plasticized region formed by the correction step is smaller than the volume amount of the plasticization region formed by the joining step And

According to such a manufacturing method, since frictional stirring is also performed from the back surface side of the base member, warpage generated by frictional stirring performed on the surface can be eliminated, and the flatness of the heat transfer plate can be easily improved. Moreover, since the volume amount of the plasticized region formed by the straightening step is smaller than the volume amount of the plasticized region formed by the joining step, the flatness of the manufactured heat transfer plate can be further improved. . The basis will be described in the examples.

Also, in the joining step, it is preferable to flow a plastic fluidized material fluidized by frictional heat into a gap formed around the heat medium pipe. According to this manufacturing method, since the gap can be filled by flowing the plastic fluid material into the gap, for example, the heat radiated from the heat medium pipe is efficiently transferred to the surrounding base member and the cover plate. Can communicate. Thereby, a heat exchanger plate with high heat exchange efficiency can be manufactured.

The present invention also includes a lid plate inserting step of inserting a lid plate into the concave groove opened on the surface side of the base member, and a joining step of performing frictional stirring by relatively moving the welding rotary tool along the concave groove. A correction step of performing frictional stirring from the back side of the base member using a rotation tool for correction, and the volume of the plasticized region formed by the correction step is plasticized by the bonding step It is characterized by being smaller than the volume of the region.
Further, the present invention provides a heat medium tube insertion step of inserting a heat medium tube into a concave groove opened on the surface side of the base member, a lid plate insertion step of inserting a lid plate into the concave groove, and the concave portion. A joining step for performing friction stir by relatively moving the joining rotary tool along the groove, and a straightening step for carrying out friction stirring from the back side of the base member using the straightening rotary tool. The volume of the plasticized region formed is smaller than the volume of the plasticized region formed by the joining step.

According to such a manufacturing method, since frictional stirring is also performed from the back surface side of the base member, warpage generated by frictional stirring performed on the surface can be eliminated, and the flatness of the heat transfer plate can be easily improved. Moreover, since the volume amount of the plasticized region formed by the straightening step is smaller than the volume amount of the plasticized region formed by the joining step, the flatness of the manufactured heat transfer plate can be further improved. . The basis will be described in the examples.

Further, in the joining step, the lid plate presses the upper part of the heat medium pipe by the pressing force of the joining rotary tool, and at least the upper part of the lid plate and the base member are plastically fluidized. preferable.

According to such a manufacturing method, since the friction stirring is performed while pushing the upper part of the heat medium pipe with the lid member, the gap around the heat medium pipe can be reduced, and the heat exchange efficiency can be improved.

In the straightening process, it is preferable that the planar shape of the locus of the straightening rotary tool is substantially point-symmetric with respect to the center of the base member. In the straightening step, it is preferable that the planar shape of the locus of the straightening rotary tool is substantially similar to the shape of the outer edge of the base member. In the straightening step, it is preferable that the planar shape of the trajectory of the straightening rotary tool is substantially the same as the planar shape of the trajectory of the joining rotary tool formed on the surface side of the base member. Moreover, in the said correction process, it is preferable that the full length of the locus | trajectory of the said rotation tool for correction is substantially the same as the full length of the locus | trajectory of the said rotation tool for joining formed in the surface side of the said base member.

According to this manufacturing method, since the warpage of the front surface side and the back surface side of the heat transfer plate can be eliminated in a balanced manner, the flatness of the heat transfer plate can be further improved.

In the straightening process, it is preferable that a total length of the locus of the correction rotary tool is shorter than a total length of the locus of the bonding rotary tool formed on the surface side of the base member. Moreover, it is preferable that the outer diameter of the shoulder part of the said rotation tool for correction used at the said correction process is smaller than the outer diameter of the shoulder part of the said rotation tool for bonding used at the said joining process. Moreover, it is preferable that the length of the pin of the rotation tool for correction used in the correction step is shorter than the length of the pin of the rotation tool for bonding used in the bonding step.

According to this manufacturing method, since the volume amount of the plasticized region in the straightening process can be set lower than the volume amount of the plasticized region in the joining step, the flatness of the manufactured heat transfer plate is improved. Can do.

Moreover, it is preferable that the thickness of the base member is 1.5 times or more the outer diameter of the shoulder portion of the rotating tool for joining. Moreover, it is preferable that the thickness of the said base member is 3 times or more of the length of the pin of the said rotation tool for joining.

According to this manufacturing method, since the base member has a sufficient thickness with respect to the size of each part of the rotating tool for joining, the flatness of the heat transfer plate can be further improved.

Further, when the base member has a polygonal shape in plan view, it is preferable that the correction step includes a corner friction stirring step of performing friction stirring with respect to the corner portion of the base member by the correction rotary tool.

According to this manufacturing method, it is possible to eliminate the warp generated at the corner of the base member and to eliminate the flatness of the heat transfer plate.

In addition, when a heater is provided inside the heat medium pipe, it is preferable to include an annealing step in which the heater is energized after the straightening step to anneal the heat transfer plate.

According to such a manufacturing method, it is possible to eliminate the internal stress remaining in the plasticized region and eliminate the warp of the heat transfer plate.

Further, it is preferable that after the straightening step, a chamfering step of chamfering the back surface side of the base member is included, and the chamfering depth is larger than the pin length of the straightening rotary tool. According to this manufacturing method, the back surface of the heat transfer plate can be formed smoothly.

Further, the present invention provides a lid groove closing step of inserting a lid plate into a lid groove formed around a concave groove opened on the surface side of the base member, and a side wall of the lid groove and a side surface of the lid plate. A joining process in which the rotating tool for joining is relatively moved along the abutting portion and friction stirring is performed, and a warp that protrudes on the back surface side of the base member formed by the joining process is pulled to the surface side of the base member. And a straightening step of straightening by applying a bending moment that generates stress.
The present invention also includes a heat medium tube insertion step of inserting a heat medium tube into a concave groove formed on the bottom surface of the cover groove that opens to the surface side of the base member, and a cover plate is inserted into the cover groove. A lid groove closing step, a joining step of performing friction stir by relatively moving a joining rotary tool along the abutting portion between the side wall of the lid groove and the side surface of the lid plate, and the base formed by the joining step And a correction step of correcting a warp convex on the back side of the member by applying a bending moment that generates a tensile stress on the surface side of the base member.

According to this manufacturing method, a warp that protrudes on the back surface side of the base member formed by the joining step by applying a bending moment that generates a tensile stress on the surface side of the base member in the straightening step. This makes it possible to improve the flatness of the heat transfer plate and to manufacture the heat transfer plate relatively easily.

Also, in the joining step, it is preferable to flow a plastic fluidized material fluidized by frictional heat into a gap formed around the heat medium pipe. According to this manufacturing method, since the gap formed in the heat transfer plate can be reduced, a heat transfer plate with high heat exchange efficiency can be manufactured.

The present invention also includes a lid plate insertion step of inserting a lid plate into a groove that opens on the surface side of the base member, a joining step of performing frictional stirring by relatively moving a welding rotary tool along the groove, A correction step of correcting a warp convex on the back surface side of the base member formed by the bonding step by applying a bending moment that generates a tensile stress on the front surface side of the base member. It is characterized by.
The present invention also provides a heat medium tube insertion step of inserting a heat medium tube into a groove that opens on the surface side of the base member, a lid plate insertion step of inserting a cover plate into the groove, and the groove A joining step in which the rotating tool for joining is relatively moved along the stirrer, and a warp that protrudes on the back side of the base member formed by the joining step, and a tensile stress is applied to the surface side of the base member. And a correction step of correcting by applying a bending moment as generated.

According to this manufacturing method, a warp that protrudes on the back surface side of the base member formed by the joining step by applying a bending moment that generates a tensile stress on the surface side of the base member in the straightening step. This makes it possible to improve the flatness of the heat transfer plate and to manufacture the heat transfer plate relatively easily.

In the joining step, it is preferable that the lid plate presses the upper portion of the heat medium pipe by the pressing force of the joining rotary tool, and at least the upper portion of the lid plate and the base member are frictionally stirred. .

According to this manufacturing method, since the gap plate formed around the heat medium pipe can be reduced by performing frictional stirring while the cover plate presses the heat medium pipe, the heat exchange efficiency is high. A heat transfer plate can be manufactured.

Further, in the correction step, press correction for pressing the base member, hit correction for hitting the base member with a hitting tool such as a hammer, or roll correction for rotating the roll member on the base member is performed. Therefore, it is preferable to correct the warp.

In addition, when the correction process is performed, the first auxiliary member that contacts the vicinity of the center of the back surface side of the base member is disposed, and the second auxiliary member and the third auxiliary member that contact the vicinity of the peripheral edge of the surface side of the base member. The warp is preferably subjected to press correction, impact correction or roll correction in a state where the members are arranged on both sides with the first auxiliary member interposed therebetween.

According to such a manufacturing method, the base member is forcibly bent to the side opposite to the warp by applying a pressing force so that the base member is convex from the back side to the convex side. Therefore, it is possible to correct the warpage. Moreover, the workability | operativity of press correction, impact correction, or roll correction can be improved by arrange | positioning an auxiliary member.

Further, it is preferable that each auxiliary member is made of a material having a hardness lower than that of the base member. According to this manufacturing method, when pressing by press correction, impact correction, or roll correction, the base member can be corrected without being damaged.

Moreover, it is preferable to include the annealing process which anneals the said heat exchanger plate after the said correction process.
Moreover, it is preferable to include the annealing process which arrange | positions the heater inside the said heat | fever medium pipe | tube, energizes the said heater after the said correction process, and anneals the said heat exchanger plate. According to this manufacturing method, the internal stress remaining in the plasticized region can be removed, and the warpage of the heat transfer plate can be further eliminated.

According to the method for manufacturing a heat transfer plate according to the present invention, a heat transfer plate with high flatness can be easily manufactured.

It is the figure which showed the heat exchanger plate which concerns on 1st embodiment, Comprising: (a) is a perspective view, (b) is the II sectional view taken on the line of (a). It is the figure which showed the heat exchanger plate which concerns on 1st embodiment, Comprising: (a) is an exploded perspective view, (b) is an exploded sectional view. It is sectional drawing which showed the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, Comprising: (a) is a groove | channel formation process, (b) is a heat medium pipe insertion process, (c) is a cover groove obstruction | occlusion. A process is shown. (A) is the side view which showed the rotation tool for joining, (b) is the side view which showed the rotation tool for correction | amendment. In the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, it is the perspective view which showed before performing a joining process. It is the top view which showed the 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 a joining process, Comprising: (a) is a perspective view, (b) is the line which connects the point c and the point f. It is sectional drawing. 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. It is sectional drawing which showed the heat exchanger plate which concerns on 2nd embodiment, Comprising: (a) is a schematic sectional drawing, (b) is sectional drawing which showed after friction stirring. It is sectional drawing which showed the heat exchanger plate which concerns on 3rd embodiment. It is the perspective view which showed the heat exchanger plate which concerns on 4th embodiment. It is the disassembled perspective view which showed the heat exchanger plate which concerns on 4th embodiment. It is the exploded sectional view showing the heat exchanger plate concerning a 4th embodiment. In the manufacturing method of the heat exchanger plate which concerns on 4th embodiment, (a) is the perspective view which showed the joining process, (b) is the II-II sectional view taken on the line of (a). In the manufacturing method of the heat exchanger plate which concerns on 4th embodiment, it is the figure which showed after performing a joining process, Comprising: (a) is a perspective view, (b) is the line which connects the point c and the point f. It is sectional drawing. In the manufacturing method of the heat exchanger plate which concerns on 4th embodiment, (a) is the top view which showed the correction friction stirring process, (b) is the top view which showed the corner friction stirring process. It is the figure which showed the chamfering process of the manufacturing method of the heat exchanger plate which concerns on 4th embodiment in the III-III line cross section of FIG. It is sectional drawing of the heat exchanger plate which concerns on 5th embodiment. It is the top view which showed the surface side of the heat exchanger plate which concerns on 6th embodiment. It is the top view which showed the back surface side of the heat exchanger plate which concerns on 6th embodiment. It is a top view of the back surface side of a heat exchanger plate, (a) is a 1st modification, (b) is a 2nd modification, (c) is a 3rd modification, (d) is a 4th modification, (e ) Shows a fifth modification, and (f) shows a sixth modification. It is the perspective view which showed the preparatory stage of the press correction which concerns on 7th embodiment. It is the side view which showed the press correction which concerns on 7th embodiment, (a) is before a press, (b) is the figure which showed the press. It is the top view which showed the press position of the press correction which concerns on 7th embodiment. It is the figure which showed the roll correction which concerns on 7th embodiment, Comprising: (a) is a perspective view, (b) is the side view which showed before the press, (c) is the side view which showed the press. It is the figure which showed the base member in an Example, (a) is a perspective view of the surface side, (b) is a top view of the back surface side. In an Example, after carrying out friction stirring of the surface side, it is the side view which showed the case where the back surface side was turned up. It is sectional drawing which showed the conventional heat exchanger plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat-transfer plate 2 Base member 6 Lid groove 8 Recessed groove 10 Lid plate 20 Heat medium pipe F Joining rotary tool G Straightening rotary tool J Butt part P Press apparatus Q Cavity part R1 Roll R2 Roll T1 First auxiliary member T2 Second auxiliary member T3 Third auxiliary member W Plasticization area Za surface Zb back surface

[First embodiment]
The best embodiment of the present invention will be described in detail with reference to the drawings. First, the heat transfer plate 1 manufactured by the manufacturing method according to the present embodiment will be described. In the present embodiment, a case where the heat transfer plate 1 is used as a heat plate will be described as an example.

As shown in FIGS. 1A and 1B, the heat transfer plate 1 includes a base member 2 having a rectangular plate thickness in plan view, a heat medium pipe 20 embedded in the base member 2, and a base. And a lid plate 10 disposed in a groove provided in the member 2. The abutting portions J1 and J2 between the base member 2 and the cover plate 10 are joined by friction stirring. The heat transfer plate 1 is used after being heated by a micro heater (not shown) inserted through the heat medium pipe 20.

The base member 2 has a role of transmitting heat of the heat medium flowing through the heat medium pipe 20 to the outside, or a role of transmitting external heat to the heat medium flowing through the heat medium pipe 20. As shown in FIGS. 2A and 2B, the base member 2 is a rectangular parallelepiped having a square shape in plan view, and in this embodiment, a base member having a thickness of 30 mm to 120 mm is used. 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 groove 8 is formed with a width A substantially equal to the diameter of the bottom surface 7. The lid groove 6 is formed to have a groove width E and the groove 8 has a depth C.

As shown in FIGS. 2A and 2B, the heat medium pipe 20 is a cylindrical pipe having a hollow portion 18 having a circular cross section. 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 B of the heat medium pipe 20 is formed to be substantially equal to the width A of the groove 8 and the depth C of the groove 8, if the heat medium pipe 20 is disposed in the groove 8, the heat medium The lower half of the pipe 20 and the bottom surface 7 of the concave groove 8 are in surface contact, and the upper end of the heat medium pipe 20 and the bottom surface 6c of the lid groove 6 are at the same height.

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. The heat medium pipe 20 uses copper in the present embodiment, but other materials 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. 2A and 2B, 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 a rectangular section that is substantially the same as the 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 cover plate 10 is formed with the same composition as the base member 2. The lid plate 10 is formed with a lid thickness H. Further, since the width of the cover plate 10 is formed substantially equal to the groove width E of the cover groove 6, when the cover plate 10 is arranged in the cover groove 6, the side surfaces 13 a and 13 b of the cover plate 10 are formed on the cover groove 6. The side walls 6a and 6b are in surface contact with each other or face each other with a fine gap. Further, the lower surface 12 of the cover plate 10 and the upper end of the heat medium pipe 20 are in contact with each other.

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) joining step, and (5) straightening step. (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. 3B, 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 FIG. 3C, the lid plate 10 is disposed in the lid groove 6 to close the lid groove 6. Here, on the abutting surface between the lid groove 6 and the lid plate 10, the part abutted between the lid groove 6 and the inner edge of the lid plate 10 is referred to as an abutting portion J <b> 1. This portion is referred to as a butt portion J2.

(4) Joining Step In the joining step, friction stirring is performed using the joining rotary tool F along the abutting portions J1 and J2. In the present embodiment, the joining process includes a first joining process in which the abutting portion J1 is frictionally stirred and a second joining process in which the abutting portion J2 is frictionally stirred.

Here, the rotating tool F for bonding used in the bonding process in the present embodiment and the rotating tool G for correction used in the correcting process described later will be described in detail.
As shown in FIG. 4A, the joining rotary tool F is made of a metal material harder than the base member 2 such as tool steel, and has a columnar shoulder portion F1 and a lower end surface F11 of the shoulder portion F1. And an agitating pin (probe) F2 provided in a protruding manner. The size and shape of the joining rotary tool F may be set according to the material, thickness, etc. of the base member 2, but at least the straightening rotary tool G used in the straightening process described later (see FIG. 4B). Larger than).

The lower end face F11 of the shoulder portion F1 is a part that plays a role of preventing the metal fluid that has been plastically fluidized from being scattered to the surroundings, and is formed in a concave shape in the present embodiment. There is no particular limitation on the size of the outer diameter X ₁ of the shoulder portion F1, in the present embodiment is larger than the outer diameter Y ₁ of the shoulder portion G1 orthodontic rotary tool G.

The stirring pin F2 hangs down from the center of the lower end surface F11 of the shoulder portion F1, and is formed into a tapered truncated cone shape in this embodiment. In addition, a stirring blade engraved in a spiral shape is formed on the peripheral surface of the stirring pin F2. There is no particular limitation on the size of the outer diameter of the stirring pin F2, in the present embodiment, the maximum outer diameter of the stirring pin G2 of the maximum outer diameter (upper diameter) X ₂ is straightening rotary tool G (upper end diameter) Y ₂ more, and the minimum outer diameter (bottom diameter) X ₃ is larger than the minimum outer diameter (bottom diameter) Y ₃ of the stirring pin G2. The length L _A of the stirring pin F2 is formed to be larger than the length L _B of the stirring pin G2 of the correction rotating tool G (see FIG. 4B).

Here, the thickness t of the base member 2 shown in FIG. 4 (a) is preferably of a length L _A of the stirring pin F2 is three times or more. The thickness t of the base member 2 is preferably at least 1.5 times the outer diameter X ₁ of the shoulder portion F1. According to this setting, since the thickness of the base member 2 can be sufficiently ensured with respect to the size of the joining rotary tool F, it is possible to reduce the warpage that occurs when performing frictional stirring.

The straightening rotary tool G shown in FIG. 4B is made of a metal material harder than the base member 2 such as tool steel, and protrudes from a shoulder portion G1 having a columnar shape and a lower end surface G11 of the shoulder portion G1. And a stirring pin (probe) G2.

The lower end surface G11 of the shoulder portion G1 is formed in a concave shape like the rotating tool F for joining. The stirring pin G2 hangs down from the center of the lower end surface G11 of the shoulder portion G1, and in the present embodiment, the stirring pin G2 is formed in a tapered truncated cone shape. In addition, a stirring blade engraved in a spiral shape is formed on the peripheral surface of the stirring pin G2.

In the first joining step, friction agitation is performed along the abutting portion J1 between the base member 2 and the cover plate 10 as shown in FIGS.
First, the start position _SM1 is set at an arbitrary position on the surface Za of the base member 2, and the agitation pin F2 of the welding rotary tool F is pushed (pressed) 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. When a part of the shoulder portion F1 of the joining rotary tool F comes into contact with the surface Za of the base member 2, the joining rotary tool F is relatively moved toward the start point s1 of the abutting portion J1. Then, as shown in FIG. 6A, when the starting point s1 is reached, the joining rotary tool F is moved as it is along the abutting portion J1 without being detached.

When the joining rotary tool F reaches the end point e1 of the abutting portion J1, the joining rotary tool F is moved to the start position S _M1 as it is, and the joining rotary tool F is moved to the end position E _M1 set at an arbitrary position. Let go.
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, friction agitation is performed along the abutting portion J2 between the base member 2 and the cover plate 10 as shown in FIGS.
First, a 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 welding rotary tool F is pushed (pressed) into the base member 2. When a part of the shoulder portion F1 of the joining rotary tool F comes into contact with the surface Za of the base member 2, the joining rotary tool F is relatively moved toward the start point s2 of the abutting portion J2. When the starting point s2 is reached, the joining rotary tool F is moved along the abutting portion J2 as it is without being detached.

After joining rotation tool F reaches the end point e2 of the butting portion J2, a joining rotation tool F as it is moved to the point f side, disengaging the joining rotation tool F at the end position E _M2 set in point f.
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. 6C, the surface plasticized region W1 (W1a, W1b) is formed along the abutting portion J1 and the abutting portion J2 by the first joining step and the second joining step. As a result, the heat medium pipe 20 is sealed by the base member 2 and the cover plate 10. Further, as shown in FIG. 1B, in the present embodiment, the depth of the surface plasticizing region W1 is substantially equal to the height of the side walls 6a and 6b of the lid groove 6 (see FIG. 2B). Therefore, the entire abutting portion J1 and the abutting portion J2 in the depth direction can be frictionally stirred. Thereby, the airtightness of the heat exchanger plate 1 can be improved.

Here, FIG. 7 is a perspective view of the heat transfer plate 1 after the joining process of the present embodiment. In the heat transfer plate 1, a surface plasticized region W1 is formed by a joining process. Since the surface plasticization region W1 shrinks due to thermal contraction, a compressive stress acts from the respective corners of the base member 2 toward the center on the surface Za side of the heat transfer plate 1. Accordingly, the heat transfer plate 1 may be distorted (bent) 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, the influence of the warp tends to be noticeable at the points a, c, f, and h at the four corners of the heat transfer plate 1. 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 in order to eliminate the warp (distortion) 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 process, as shown in FIG. 8, a tab material 31 for setting a start position and an end position of a correction friction stirring process described later is arranged. In the present embodiment, the tab material 31 has a rectangular parallelepiped shape and has the same composition as the base member 2. The tab material 31 is in 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 31 is temporarily joined by welding both side surfaces of the tab material 31 and the side surface Zc of the base member 2. The surface of the tab material 31 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 using the rotation tool G for correction as shown in FIGS. In the straightening friction stirring process, the friction stirring is performed with a pressing amount substantially equal to that in the joining process. In this embodiment, the route of the straightening friction stirring step is set so as to surround the central point j ′ and the back plasticization region W2 formed by the straightening friction stirring step is radial with respect to the central point j ′. . Here, the points a ′, b ′,... Are points corresponding to the back surface Zb side of the point a, the point b,.

In the straightening friction stirring step, as shown in FIG. 8A, first, a start position _SM2 is set on the surface of the tab material 31, and the stirring pin G2 of the straightening rotary tool G is pushed into the tab material 31 (pressing) To do). When a part of the shoulder portion G1 of the correction rotary tool G comes into contact with the tab member 31, the correction rotary tool G is relatively moved toward the base member 2. And it becomes convex in plan view near the point f ′, the point a ′, the point c ′, and the point h ′ on the back surface Zb of the base member 2, and near the point g ′, the point d ′, the point b ′, and the point e ′. Then, the rotational tool G for correction is relatively moved so as to have a concave shape in plan view, and friction stirring is performed. That is, as shown in FIG. 8B, the back surface plasticized region W2 is formed so as to be symmetric with respect to the center line (dashed line) of the base member 2. In the present embodiment, the start position S _M2 and the end position E _M2 are provided on the tab material 31, 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 31 is cut out.

In the present embodiment, the trajectory of the correction rotary tool G, that is, the shape of the back surface 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.

Further, in the present embodiment, the length of the trajectory of the correction rotating tool G (the length of the back surface plasticizing region W2) is greater than the length of the trajectory of the rotating tool F for bonding (the length of the surface plasticizing region W1). Is also 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 bonding rotary tool F in the bonding process. Thereby, the flatness of the heat exchanger plate 1 can be improved. The reason for this will be described in Examples. 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, even if the heat transfer plate 1 is distorted due to heat shrinkage due to the joining process, the surface Za is also obtained by performing frictional stirring on the back surface Zb of the base member 2. Thus, the flatness of the heat transfer plate 1 can be easily improved. That is, the back surface plasticized region W2 formed on the back surface Zb of the base member 2 is shrunk due to thermal contraction, and therefore, on the back surface Zb side of the heat transfer plate 1, compression is performed from each corner side of the base member 2 toward the center side. Stress acts. Thereby, the curvature formed by this joining process is eliminated, and the flatness of the heat exchanger plate 1 can be improved.

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

[Second Embodiment]
In the first embodiment described above, even if friction stirring is performed in the joining step, a gap is formed around the heat medium pipe 20 (see FIG. 1). Therefore, as in the second embodiment shown in FIGS. 9A and 9B, the plastic fluidizing material is caused to flow into the gap formed around the heat medium pipe 20 to fill the gap. Also good.

That is, as shown in FIG. 9, the width of the lid groove 6 and the lid plate 10 is set to be smaller than that of the first embodiment, and the abutting portion J1 and the abutting portion J2 are located in the vicinity of the heat medium pipe 20. To form. Then, the plastic fluidizing material can be caused to flow into the gaps Q and Q formed around the heat medium pipe 20 by pushing the joining rotary tool F at a predetermined depth and performing frictional stirring. As a result, as shown in FIG. 9B, since the periphery of the heat medium pipe 20 is sealed with the plasticized metal, the heat transfer plate 1 ′ having high heat transfer can be formed.
In addition, what is necessary is just to set suitably how much a plastic fluid material is made to flow into the space | gap part Q according to the magnitude | size of the rotation tool F for joining, the pushing amount, and the shape of the cover groove | channel 6 and the cover board 10. FIG. Since other manufacturing steps are substantially the same as those in the first embodiment, detailed description thereof is omitted.

[Third embodiment]
FIG. 10 is a cross-sectional view showing the third embodiment. The heat transfer plate 1 '' according to the third embodiment is the same as the heat transfer plate 1 according to the first embodiment, except that the heat medium pipe 20 according to the first embodiment is not provided. As in the heat transfer plate 1 ″, the heat medium may be directly flowed into the concave groove 8 without providing the heat medium pipe. Since the manufacturing method of the heat transfer plate 1 ″ is the same as that of the first embodiment except that the heat medium pipe is not inserted, the description thereof is omitted.

[Fourth embodiment]
Next, a fourth embodiment of the present invention will be described. In the description of the fourth embodiment, the points overlapping with the first embodiment will be briefly described. In the first embodiment described above, by conducting frictional stirring along both side surfaces of the cover plate 10, transmission is performed so that two plasticized regions are formed like the surface plasticized regions W1 and W1. Although the heat plate is formed, as in the fourth embodiment, the heat transfer plate may be formed by setting the width of the cover plate to be small and forming only one line of plasticized region.

As shown in FIGS. 11 and 12, the heat transfer plate 41 manufactured according to the fourth embodiment includes a base member 2 having a square thickness in plan view, and heat inserted into a groove recessed in the base member 2. It mainly includes a medium tube 21 and a lid plate 42 inserted into a groove provided in the base member 2. The upper surface of the cover plate 42 is joined by a single friction stir.

As shown in FIGS. 12 and 13, the surface Za of the base member 2 is formed with a concave groove 43 that is continuously formed from one side surface Zc of the base member 2 to the other side surface Zd that faces the base member 2. The concave groove 43 is a portion into which the heat medium pipe 21 and the lid plate 42 are inserted. The concave groove 43 is formed so as to have a U-shape in a sectional view and a meandering shape in a plan view. As shown in FIG. 13, the width A ′ between the side walls 43 a and 43 b of the concave groove 43 is formed to be approximately equal to the outer diameter of the heat medium pipe 20. The width A of the groove 43 'is formed smaller than the outer diameter X ₁ of the shoulder portion F1 of the joining rotation tool F. The depth of the concave groove 43 is formed with a depth C ′.

The heat medium pipe 21 is a pipe inserted into the concave groove 43 and is formed so as to penetrate from one side surface Zc of the base member 2 to the other side surface Zd. The heat medium pipe 21 has a meandering shape in plan view, and has a shape substantially equivalent to the shape of the groove 43 in plan view.

The lid plate 42 is a member that has a rectangular cross-sectional view and a serpentine shape in plan view, and is a member that is inserted into the concave groove 43. The lid plate 42 includes side surfaces 42a and 42b, an upper surface 42c, and a lower surface 42d. When the cover plate 42 is inserted into the groove 43, the upper surface 42c and the surface Za of the base member 2 are flush with each other, and the side surfaces 42a and 42b of the cover plate 42 are in surface contact with the side walls 43a and 43b of the groove 43, respectively. Or face each other with a fine gap.

Next, a manufacturing method according to the fourth embodiment will be described.
The manufacturing method of the heat transfer plate according to the fourth embodiment includes (1) groove forming step, (2) heat medium tube inserting step, (3) lid plate inserting step, (4) joining step, and (5) straightening step. (6) A chamfering step is included.

(1) Groove Forming Step In the groove forming step, as shown in FIGS. 12 and 13, the concave groove 43 is formed on the surface Za of the base member 2 with a predetermined width and depth. The groove forming step is performed using, for example, a known end mill.

(2) Heat medium tube insertion step In the heat medium tube insertion step, as shown in FIGS. 12 and 13, the heat medium tube 21 is inserted into the groove 43 formed in the groove formation step.

(3) Lid Plate Inserting Step In the lid plate inserting step, as shown in FIGS. 12 and 13, the lid plate 42 is inserted into the concave groove 43 to close the concave groove 43. Here, in the abutting surface between the concave groove 43 and the lid plate 42, a portion which is abutted by one side wall 43 a of the concave groove 43 and one side surface 42 a of the lid plate 42 is defined as an abutting portion J <b> 3. A portion that is abutted between the other side wall 43b and the other side surface 42b of the lid plate 42 is referred to as an abutting portion J4.

(4) Joining Step In the joining step, friction stirring is performed using the joining rotary tool F along the lid plate 42 (concave groove 43). In the present embodiment, the joining process includes a tab material arranging process for arranging the tab material, and a main joining process for performing frictional stirring.

In the tab material arranging step, as shown in FIG. 14A, a pair of tab materials 33 and 34 are arranged on one side surface Zc and the other side surface Zd of the base member 2, respectively. Both side surfaces of the tab members 33 and 34 and the base member 2 are temporarily joined by welding.

In the main joining step, as shown in FIGS. 14A and 14B, friction stirring is performed along the cover plate 42 (concave groove 43). When the joining rotary tool F is pushed into the start position _SM4 set on the tab member 33 and the shoulder portion F1 comes into contact with the base member 2, the joining rotary tool F is relatively moved along the cover plate 42, and the tab member 34 is moved. Friction stir is continuously performed up to the end position E _M4 set to. As shown in (b) of FIG. 14, the outer diameter X ₁ of the shoulder portion F1 of the joining rotation tool F is, since the set larger than the width A 'of the groove 43, the width direction of the cover plate 42 When the joining rotary tool F is moved along the center, the abutting portions J3 and J4 are plasticized. As described above, according to the present embodiment, it is possible to friction stir the abutting portions J3 and J4 only by setting one route, so that it is possible to greatly reduce the work labor compared to the first embodiment. it can. Further, when the friction stir is performed, the welding rotary tool F pushes the cover plate 42, so that the heat medium pipe 21 is also pressed and deformed. Thereby, since the space | gap part Q formed in the circumference | surroundings of the pipe | tube 21 for heat media can be reduced, the heat exchange efficiency of the heat exchanger plate 41 can be improved.
When the main joining process is completed, the tab material is cut out from the base member 2.

Here, (a) and (b) of FIG. 15 are views showing the heat transfer plate 41 after the main joining process of the present embodiment. In the heat transfer plate 41, a surface plasticized region W3 is formed by a joining process. Since the surface plasticization region W3 shrinks due to thermal contraction, the heat transfer plate 41 may be warped and distorted so as to be concave on the surface Za side. In particular, among the points a to j shown on the surface Za of the heat transfer plate 41, the points a, c, f, and h related to the four corners of the heat transfer plate 41 tend to be noticeably warped. Note that the point j indicates the center point of the heat transfer plate 41.

(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 straightening process is a process performed to eliminate the warp generated in the joining process. In the present embodiment, the straightening process includes a straightening friction stirring process in which frictional stirring is performed in a radial manner and a corner friction stirring process in which frictional stirring is performed on the corner of the base member 2.

In the straightening friction stirring step, as shown in FIG. 16A, friction stirring is performed so that a plasticized region is formed radially through the central point j ′. That is, on the straight line connecting point a ′ and point h ′, on the straight line connecting point d ′ and point e ′, on the straight line connecting point f ′ and point c ′, and on point g ′ and point b ′. The friction stirring start position (S _M5 , S _M6 , S _M7 , S _M8 ) and the end position (E _M5 , E _M6 , E _M7 , E _M8 ) are set on the connecting line, and the center point from each start position. The friction stir route is set so that the distance to j ′ is equal to the distance from the center point j ′ to each end position.
After setting the friction stir route in the straightening friction stirring step, the straightening rotary tool G is pushed into each start position, and the straightening rotary tool G is moved along each route (straight line). In the straightening friction stirring process, the friction stirring is performed with a pressing amount substantially equal to that in the joining process. . As shown in FIG. 16 (b), the back surface plasticized regions W41 to W44 formed by the correction friction stirring step are formed to radially spread in eight directions with respect to the central point j ′.

In the corner friction agitation step, as shown in FIG. 16B, friction agitation is intensively performed at the corners of the base member 2 at the points a ′, c ′, f ′ and h ′. Do. That is, the friction stirring start position S _M9 and the end position E _M9 are set on the one side 2a side that forms the corner of the point a ′, and the turn-back position S _R9 is set on the other side 2b side. Then, pushing the orthodontic rotary tool G to the starting position S _M9, after moving toward the folded position S _R9, folded back at the folded position S _R9, disengaging the orthodontic rotary tool G at the end position E _M9. The same process is performed on each corner of the point c ′, the point f ′, and the point h ′. According to the corner friction stirring step, since the correction step can be performed mainly on the corner portion of the base member 2 having a large warp, the flatness of the heat transfer plate 41 can be further improved.

In the present embodiment, the corner friction stirring step is formed so that the trajectory of the correction rotary tool G is perpendicular to the diagonal line at each corner, but is not limited thereto. A route for friction stirring may be set as appropriate in consideration of the degree of warping of the corner. In addition, the back surface plasticization region W45 and the back surface plasticization region W47, and the back surface plasticization region 46 and the back surface plasticization region W48 formed in the corner friction stirring step are formed so as to be symmetric with respect to the center point j ′. It is preferred that Thereby, the curvature of the surface Za side and the back surface Zb side of the heat-transfer plate 41 can be eliminated in a balanced manner, and the flatness of the heat-transfer plate 41 can be improved.

(6) Chamfering step In the chamfering step, the back surface Zb of the heat transfer plate 41 is chamfered using a known end mill or the like. As shown in FIG. 16 (b), on the back surface Zb of the heat transfer plate 41, a hole (not shown) of the correction rotary tool G or a groove (not shown) generated by pushing each rotary tool, Burr etc. occur. Therefore, the back surface Zb of the heat transfer plate 41 can be formed smoothly by performing the chamfering process. In the present embodiment, as shown in FIG. 17, the thickness Ma of the chamfering process is set larger than the thickness Wa of the back surface plasticizing region W42. Thereby, the back surface plasticized regions W41 to W44 formed on the back surface Zb of the base member 2 are removed, so that the properties of the base member 2 can be made uniform. Further, since the back surface plasticized region W42 or the like is not exposed on the back surface Zb, it is suitable for design and the like.

In the present embodiment, the thickness of the chamfering process is set to be larger than the thickness of the back surface plasticizing region, but the present invention is not limited to this. The thickness of the chamfering process may be set larger than the length of the stirring pin G2 of the correction rotary tool G, for example.
Moreover, in this embodiment, although the correction process was performed using the correction rotary tool G provided with the stirring pin G2, the correction process may be performed using the correction rotation tool not including the stirring pin G2. According to such a rotating tool, since the depth of the back surface plasticization region can be reduced, the thickness to be chamfered can be reduced. Thereby, since there are few chamfering parts, the loss of the base member 2 can be made small and cost can be reduced.

According to the fourth embodiment described above, even if the heat transfer plate 41 is distorted due to the heat shrinkage due to the joining process, it is generated on the surface Za by performing frictional stirring on the back surface Zb of the base member 2. Warpage can be eliminated and the flatness of the heat transfer plate 41 can be easily increased. That is, the back surface plasticized regions W41 to W44 formed on the back surface Zb of the base member 2 are shrunk due to thermal contraction, and therefore, on the back surface Zb side of the heat transfer plate 41, from each corner side of the base member 2 toward the center side. Compressive stress acts. Thereby, the curvature formed by this joining process is eliminated, and the flatness of the heat exchanger plate 41 can be improved.

In addition, according to the fourth embodiment, the abutting portions J3 and J4 between the cover plate 42 and the concave groove 43 can be frictionally stirred by one movement of the joining rotary tool F. Therefore, compared to the first embodiment. Therefore, labor can be saved greatly. In addition, since the corner friction stirring step is performed on the back surface Zb of the base member 2, the flatness of the heat transfer plate 41 can be improved by mainly correcting the corner portion having a large warp. .

[Fifth embodiment]
FIG. 18 is a cross-sectional view of a heat transfer plate according to the fifth embodiment. The heat transfer plate 51 according to the fifth embodiment is the same as the heat transfer plate 41 according to the fourth embodiment except that the heat transfer plate 51 is not provided. As shown in the heat transfer plate 51, the heat medium may flow directly into the concave groove 43. Since the manufacturing method of the heat transfer plate 51 is the same as that of the fourth embodiment except that the heat medium pipe 21 is not inserted, the description thereof is omitted.

[Sixth embodiment]
FIG. 19 is a plan view showing the surface side of the heat transfer plate according to the sixth embodiment. FIG. 20 is a plan view showing the back side of the heat transfer plate according to the sixth embodiment. As in the sixth embodiment shown in FIGS. 19 and 20, the friction stirrer according to the correction process is performed so that the plasticized regions formed on the front surface Za side and the back surface Zb side of the heat transfer plate have substantially the same shape. A route may be set. In the sixth embodiment, similarly to the fourth embodiment, the heat medium pipe 53 and the cover plate 54 are inserted into the concave groove formed on the surface of the base member 2 to form a single plasticized region W60. Are joined together. In the sixth embodiment, the description overlapping with the fourth embodiment is omitted.

A heat transfer plate 61 shown in FIG. 19 includes a base member 2 having an opening 52 in the center, and a heat medium pipe 53 embedded in a groove (not shown) cut out in the surface Za of the base member 2. The lid plate 54 mainly closes the groove.

The heat medium pipe 53 is embedded in the base member 2 so as to exhibit a cross shape with a hollow in plan view. One end and the other end of the heat medium pipe 53 are exposed to the opening 52 of the base member 2. Heat is supplied from one end of the heat medium pipe 53 that appears in the opening 52, and the heat is discharged from the other end to be transmitted to the base member 2.

The abutting portion between the lid plate 54 and the base member 2 is joined by friction stirring by a joining rotary tool F through a process substantially equivalent to the joining process according to the fourth embodiment. Thereby, the surface plasticization region W60 is formed on the surface Za of the base member 2 so as to exhibit a substantially hollow shape in plan view.

On the other hand, as shown in FIG. 20, the back surface Zb of the heat transfer plate 61 is formed with a back surface plasticized region W61 so as to have a hollow shape in a plan view, like the front surface Za. The friction stirring start position S _M and the end position E _M in the correction process are set at an arbitrary point on the base member 2. In the correction process, frictional stirring is performed with a pressing amount substantially equal to that in the joining process. In addition, the back surface plasticizing region W61 is friction-stirred in the manner of one-stroke writing using the correction rotating tool G.

Like the heat transfer plate 61 according to the sixth embodiment, the surface plasticization region W60 and the back surface plasticization region W61 respectively formed on the front surface Za and the back surface Zb of the heat transfer plate 61 are corrected so as to exhibit substantially the same shape. You may set the route of the friction stirring which concerns on a process. According to the joining step and the straightening step, the shapes of the plasticized regions formed on the front surface Za side and the back surface Zb side of the heat transfer plate 61 are substantially the same, so that the warpage of the heat transfer plate 61 is eliminated in a balanced manner. Flatness can be improved.
According to the sixth embodiment, the length of the locus of friction agitation performed on the surface Za side of the base member 2 is substantially equal to the length of the locus of friction agitation performed on the back surface Zb side. Since G is formed to be smaller than the joining rotary tool F, the degree of processing in the correction process is smaller than the degree of processing in the joining process.

Note that the correction process is not limited to the friction stir route of the first to sixth embodiments described above, and various routes can be set. Below, the other form of the route of friction stirring which concerns on a correction process is demonstrated.

[First Modification to Sixth Modification]
The route of the friction stirrer related to the correction process is not limited to the above-described form, and may be the following form. FIG. 21 is a plan view of the back side of the heat transfer plate, where (a) is a first modification, (b) is a second modification, (c) is a third modification, and (d) is a fourth modification. For example, (e) shows a fifth modification, and (f) shows a sixth modification.

The trajectories (back surface plasticization region W2) of the correction rotary tool of the first modification and the second modification shown in FIGS. 21A and 21B all surround the center point j ′ of the base member 2. It is characterized by being 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.21 (b).

Each of the trajectories (back surface plasticizing region W2) of the correction rotary tool of the third modification and the fourth modification shown in FIGS. 21C and 21D passes through the center point j ′ of the base member 2. It is characterized by being formed radially. The third modification shown in FIG. 20C 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 modification shown in FIG. 20D is formed so as to pass through the center point j ′ and to be parallel to the diagonal line of the base member 2.

The trajectories (back surface plasticization region W2) of the correction rotary tools of the fifth and sixth modified examples shown in FIGS. 20 (e) and (f) are divided into four regions by straight lines passing through the central point j ′. The four loci of the same shape are formed independently, and the loci 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.

As described above, the correction step may be performed by appropriately setting the route of friction stirring according to the locus of friction stirring in the joining step performed on the base member 2.
In the description of the present embodiment, the base member 2 has been described as an example of a square in plan view, but may have other shapes.

[Seventh embodiment]
In the correction process according to the first to sixth embodiments described above, the correction of the warp was performed by performing frictional stirring on the back surface Zb of the base member 2 using the correction rotary tool G, but is not limited thereto. It is not a thing. In the straightening process according to the seventh embodiment, a bending moment that generates a tensile stress from the back surface Zb of the heat transfer plate 1 (base member 2) to the front surface Za side of the base member 2 is applied, and the above-described joining process. The warp of the heat transfer plate 1 formed by the above is corrected. In the correction process according to the present embodiment, any one or more methods may be selected from the following three methods: press correction, impact correction, and roll correction.

FIG. 22 is a perspective view illustrating a preparatory stage for press correction according to the seventh embodiment. FIG. 23 is a side view showing press correction according to the seventh embodiment, where (a) shows before pressing and (b) shows during pressing. FIG. 24 is a plan view showing a pressing position for press correction according to the seventh embodiment. FIG. 25 is a view showing roll correction according to the seventh embodiment, where (a) is a perspective view, (b) is a side view showing before pressing, and (c) is a side view showing during pressing. It is.
In addition, in the correction process which concerns on 7th embodiment, it demonstrates using the heat exchanger plate 1 which concerns on 1st embodiment.

(Press correction)
After performing the joining step in the same manner as in the first embodiment described above, while removing burrs generated by friction stirring, as shown in FIG. 22, turn over so that the back surface Zb of the heat transfer plate 1 faces upward, A plate-like first auxiliary member T1 is disposed at the center point j ′ (see FIG. 7B) on the back surface Zb. Furthermore, plate-like second auxiliary members T2, T2 and third auxiliary members T3, T3 are arranged at the four corners on the surface Za side of the heat transfer plate 1. That is, the second auxiliary member T2 and the third auxiliary member T3 are disposed on both sides with the first auxiliary member T1 interposed therebetween. The first auxiliary member T1 to the third auxiliary member T3 are members that serve as a contact material or a base when performing press correction, and are members that prevent the heat transfer plate 1 from being damaged. The first auxiliary member T1 to the third auxiliary member T3 may be any material that is softer than the heat transfer plate 1, and for example, aluminum alloy, hard rubber, plastic, and wood can be used. The first auxiliary member T1 to the third auxiliary member T3 are set with a thickness sufficient to correct the warp by bending to the opposite side of the warp according to the mechanical characteristics of the heat transfer plate 1 and the curvature of the warp. do it.

When each auxiliary member is arranged, it is pressed from the rear surface Zb of the heat transfer plate 1 using a known press device P as shown in FIGS. The punch Pa of the pressing device P is pressed against the first auxiliary member T1 and pressed with a predetermined pressing force. When pressure is applied to the heat transfer plate 1 by the press device P, as shown in FIGS. 23A and 23B, the first auxiliary member T1 pushes the heat transfer plate 1 downward, and the second auxiliary member Since T2 and the third auxiliary member T3 push both end sides of the heat transfer plate 1 upward, a bending moment acts on the heat transfer plate 1. Since this bending moment generates a tensile stress on the surface Za side of the heat transfer plate 1, the heat transfer plate 1 is forcibly bent downwardly.

The pressing force of the press device may be set as appropriate depending on the thickness and material of the heat transfer plate 1, but as shown in FIG. 23 (b), the surface Za side of the heat transfer plate 1 is convex downward, It is preferable to apply a bending moment that causes tensile stress to Za.

Further, in the present embodiment, as shown in FIG. 24, not only the central point j ′ but also the points b ′, d ′, e ′ and g ′ of the back surface Zb of the heat transfer plate 1 are pressed. I do. The first auxiliary member T1 is disposed at positions H2 to H5 including a point b ′, a point d ′, a point e ′, and a point g ′, which are intermediate points between the sides on the back surface Zb of the heat transfer plate 1, and press Pressing is performed by the device P. Thereby, the heat exchanger plate 1 can be corrected with good balance, and flatness can be further improved.

In addition, although the position to press was set to five places in this embodiment, it is not limited to this, What is necessary is just to set suitably according to the curvature of the heat exchanger plate 1 produced by a joining process.

(Shock correction)
Next, hit correction will be described. For impact correction, it approximates press correction.
Specific illustration is omitted. The hit correction means correcting a warp generated in the heat transfer plate using a hitting tool such as a hammer. The impact correction is substantially the same as the press correction except that the heat transfer plate 1 is impacted with an impact tool such as a hammer instead of the press device P.

In the impact correction, after the auxiliary members are arranged in the same manner as the press correction, the heat transfer plate 1 is moved from the rear surface Zb of the heat transfer plate 1 with an impact tool such as a plastic hammer as shown in FIGS. Hit it. When the heat transfer plate 1 is struck, a tensile stress is generated on the surface Za side of the heat transfer plate 1, so that the heat transfer plate 1 is forcibly bent downward (see FIG. 23B). . Thereby, the curvature of the heat exchanger plate 1 can be corrected and made flat. Similarly to the press correction, the heat transfer plate 1 can be corrected in a balanced manner by striking the positions H2 to H5 (see FIG. 24) of the back surface Zb of the heat transfer plate 1 as necessary.

Impact correction is easier than press correction because it eliminates the need to prepare a press device and the like. Further, the impact correction is effective when the heat transfer plate 1 is small or thin because the work is easy. In addition, it is preferable to remove the burr generated by the hit after the hit correction. The hitting tool is not particularly limited as long as it can hit the heat transfer plate 1, but for example, a plastic hammer is preferable.

(Roll straightening)
Next, roll correction will be described. After performing the joining process in the same manner as in the first embodiment, burrs generated by friction stirring are removed, and the back surface Zb of the heat transfer plate 1 faces upward as shown in FIG. The first auxiliary member T1 having a long plate shape is arranged so as to be parallel to the vertical direction including the center point j ′ (see FIG. 7B) of the back surface Zb. Further, the long plate-shaped second auxiliary member T2 and the third auxiliary member T3 are arranged so as to be parallel to the vertical direction at the edge portion on the surface Za side of the heat transfer plate 1. That is, the second auxiliary member T2 and the third auxiliary member T3 are disposed on both sides with the first auxiliary member T1 interposed therebetween.

And roll R1 is arrange | positioned so that it may orthogonally cross with 1st auxiliary member T1 above 1st auxiliary member T1, 2nd auxiliary member T2 and 3rd auxiliary member T3 below 2nd auxiliary member T2, T3, Roll R2 is arrange | positioned so that it may orthogonally cross. That is, as shown in FIG. 25 (b), the heat transfer plate 1 is disposed between the rolls R1 and R2 so as to protrude upward, and is rolled via the first auxiliary member T1 to the third auxiliary member T3. It is held between R1 and R2.

The first auxiliary member T1 to the third auxiliary member T3 are members for performing roll correction and are members for preventing the heat transfer plate 1 from being damaged. The first auxiliary member T1 to the third auxiliary member T3 may be any material that is softer than the heat transfer plate 1, and for example, aluminum alloy, hard rubber, plastic, and wood can be used.

Here, when the rolls R1 and R2 approach each other and apply pressure to the heat transfer plate 1, the first auxiliary member T1 lowers the heat transfer plate 1 as shown in FIGS. 25 (b) and (c). Since the second auxiliary member T2 and the third auxiliary member T3 push the both end sides of the heat transfer plate 1 upward, a bending moment acts on the heat transfer plate 1. Since this bending moment generates a tensile stress on the surface Za side of the heat transfer plate 1, the heat transfer plate 1 is forcibly bent downwardly.

Further, as shown in FIG. 25A, when the roll R1 rotates in the arrow α direction and the roll R2 rotates in the arrow β direction, the rolls R1 and R2 are moved in the arrow γ direction ( Moves relatively in the roll feed direction). When the roll R1 rotates in the arrow β direction and the roll R2 rotates in the arrow α direction, the rolls R1 and R2 move relative to the heat transfer plate 1 in the arrow δ direction (roll feed direction).

Therefore, since the position of the bending moment acting on the heat transfer plate 1 transitions with the relative movement, the entire heat transfer plate 1 is forcibly bent downward. Therefore, it is possible to correct the warp by repeatedly reciprocating this relative movement. The first auxiliary member T1 to the third auxiliary member T3 are set with a thickness sufficient to correct the warp by bending to the opposite side of the warp according to the mechanical characteristics of the heat transfer plate 1 and the curvature of the warp. do it.

Further, after the rolls R1 and R2 are rotated in the vertical direction of the heat transfer plate 1 and the correction process is performed, the rolls R1 and R2 may be rotated in the horizontal direction. That is, the first auxiliary member T1 to the third auxiliary member T3 are arranged so as to be parallel to the lateral direction, and the rolls R1, R2 are arranged so as to be orthogonal to the first auxiliary member T1 to the third auxiliary member T3. To do. And roll R1, R2 is reciprocated to a horizontal direction. Thereby, the heat exchanger plate 1 can be corrected with sufficient balance.

In addition, here, the description has been made on the assumption that the back surface Zb of the heat transfer plate 1 is up and the distortion correction process is performed, but the distortion correction process may be performed with the surface Za up without turning over. In this case, since each component described above appears symmetrically, description thereof is omitted.

According to the seventh embodiment described above, tensile stress is generated on the back surface Za of the base member 2 even if the heat transfer plate 1 is distorted by heat shrinkage due to the joining process on the surface Za of the heat transfer plate 1. By applying such a bending moment, the flatness of the heat transfer plate can be easily increased.

Next, examples of the present invention will be described. In the embodiment according to the present invention, as shown in FIGS. 26 (a) and 26 (b), friction stirring is performed so as to draw three circles on the front surface Za and the rear surface Zb of the base member 2 having a square shape in plan view. The deformation amount of the warp generated on the side and the deformation amount of the warp generated on the back surface Zb side were measured. That is, the flatness of the base member 2 is higher as the value of the amount of warpage deformation generated on the front surface Za side is closer to the value of the amount of warpage deformation generated on the rear surface Zb side.

The base member 2 was a rectangular parallelepiped having a plan view of 500 mm × 500 mm, and the measurement was performed using two types having a thickness of 30 mm and 60 mm. The material of the base member 2 is JIS standard 5052 aluminum alloy.

The three circles that are the locus of frictional stirring are centered on the point j or the point j ′ set at the center of the base member 2, the radius r1 = 100 mm (hereinafter also referred to as a small circle) for both the front surface Za and the rear surface Zb, and r2 = It was set to 150 mm (hereinafter also referred to as middle circle) and r3 = 200 mm (hereinafter also referred to as great circle). Friction stirring was performed in the order of small circle, middle circle, and great circle.

Rotating tools having the same size were used for both the front surface Za side and the back surface Zb side. The size of the rotating tool is such that the outer diameter of the shoulder portion is 20 mm, the length of the stirring pin is 10 mm, the size of the base of the stirring pin (maximum diameter) is 9 mm, and the size of the tip of the stirring pin (minimum diameter) is 6 mm. A thing was used. The rotational speed of the rotary tool was set to 600 rpm, and the feed rate was set to 300 mm / min. Further, the pressing amount of the rotary tool was set constant on both the front surface Za side and the back surface Zb side. As shown in FIG. 26, the plasticized regions formed on the surface Za side are referred to as a plasticized region W21 to a plasticized region W23 from the small circle to the great circle, respectively. Further, the plasticized regions formed on the back surface Zb side are designated as plasticized regions W31 to W33 from the small circle to the great circle. The respective measurement results in this example are shown in Tables 1 to 4 below.

Table 1 is a table showing measured values when the thickness of the base member is 30 mm and frictional stirring is performed from the surface side. “Before FSW” indicates the height difference between the central point j (reference j) and each point (point a to point h) before the friction stir. “After FSW” indicates a difference in height between the reference j and each point after performing frictional stirring of three circles with the reference j being zero. The “surface side deformation amount” indicates a value (after FSW−before FSW) at each point. The bottom column of “Surface-side deformation amount” indicates an average value of the points a to h. Negative values of “before FSW” and “after FSW” mean that they are located below the reference j.

Table 2 is a table showing the measured values when the plate thickness of the base member is 30 mm and frictional stirring is performed from the back side (correcting step). “Before FSW” indicates the level difference between the central point j ′ (reference j ′) and each point (a ′ to h ′) before the friction stir.
As shown in FIG. 27, “FSW1” indicates a difference in height between the reference j ′ and each point after the frictional stirring of the small circle (radius r1) with the reference j ′ set to zero. “Back side deformation amount 1” indicates a value (before FSW1−FSW) at each point. The bottom column of “back side deformation amount 1” indicates an average value of points a to h.
“FSW2” indicates a difference in height between the reference j ′ and each point after performing frictional stirring of the middle circle (radius r2) in addition to the small circle (radius r1) with the reference j ′ set to zero. ing. “Back side deformation 2” indicates the value of (before FSW2−FSW) at each point. The bottom column of “back side deformation 2” shows the average value of points a to h.
“FSW3” is based on the reference j ′ after the frictional stirring of the great circle (radius r3) in addition to the small circle (radius r1) and the middle circle (radius r2) with the reference j ′ set to zero. The height difference from the point is shown. “Back side deformation amount 3” indicates a value (before FSW3−FSW) at each point. The bottom column of “back side deformation 3” shows the average value of points a to h.

Table 3 is a table showing measured values when the thickness of the base member is 60 mm and frictional stirring is performed from the surface side. Each item in Table 3 has substantially the same meaning as each item in Table 1.

Table 4 is a table showing measured values when the thickness of the base member is 60 mm and frictional stirring is performed from the back side. Each item in Table 4 has substantially the same meaning as each item in Table 2.

Comparing the average value (1.61) of “front side deformation” in Table 1 and the average value (2.04) of “back side deformation 1” in Table 2, the value of “back side deformation 1” is more large. Similarly, the average value (2.95) of “back side deformation 2” and the average value (3.53) of “back side deformation 3” are larger than the average value (1.61) of “front side deformation”. ing. That is, when the plate thickness of the base member is 30 mm, the warping of the base member will return too much even if only a small circle of friction stirring is performed from the back side. Therefore, in the case of the base member 30 mm, the flatness of the base member 2 can be improved with a lower processing degree than the surface side.

Comparing the average value (0.98) of “front side deformation amount” in Table 3 with the average value (0.91) of “back side deformation amount 2” in Table 4, the deformation amounts of both are approximated. Therefore, when the plate thickness of the base member 2 was 60 mm, it was confirmed that the flatness of the base member 2 was high when the frictional stirring of the small circle and the middle circle was performed from the back side. That is, when the plate thickness is 60 mm, the flatness of the base member 2 can be improved by setting the processing degree on the back surface side to be lower than that on the front surface side.

Claims (35)

1. A lid groove closing step of disposing a lid plate in the lid groove formed around the concave groove opening on the surface side of the base member;
   A joining step in which friction stir is performed by relatively moving the joining rotary tool 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 side of the base member using a correction rotating tool,
   The method for manufacturing a heat transfer plate, wherein a volume amount of the plasticized region formed by the straightening step is smaller than a volume amount of the plasticized region formed by the joining step.
2. A heat medium tube insertion step of inserting the heat medium tube into the concave groove formed in the bottom surface of the lid groove opening on the surface side of the base member;
   A lid groove closing step of disposing a lid plate in the lid groove;
   A joining step in which friction stir is performed by relatively moving the joining rotary tool 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 side of the base member using a correction rotating tool,
   The method for manufacturing a heat transfer plate, wherein a volume amount of the plasticized region formed by the straightening step is smaller than a volume amount of the plasticized region formed by the joining step.
3. 3. The heat transfer plate according to claim 2, wherein in the joining step, a plastic fluidized material fluidized by frictional heat is caused to flow into a gap formed around the heat medium pipe. Manufacturing method.
4. A lid plate insertion step of inserting a lid plate into the concave groove opened on the surface side of the base member;
   A joining step of performing frictional stirring by relatively moving the joining rotary tool along the concave groove;
   A correction step of performing frictional stirring from the back side of the base member using a correction rotating tool,
   The method for manufacturing a heat transfer plate, wherein a volume amount of the plasticized region formed by the straightening step is smaller than a volume amount of the plasticized region formed by the joining step.
5. A heat medium pipe insertion step of inserting the heat medium pipe into the concave groove opened on the surface side of the base member;
   A lid plate insertion step of inserting a lid plate into the concave groove;
   A joining step of performing frictional stirring by relatively moving the joining rotary tool along the concave groove;
   A correction step of performing frictional stirring from the back side of the base member using a correction rotating tool,
   The method for manufacturing a heat transfer plate, wherein a volume amount of the plasticized region formed by the straightening step is smaller than a volume amount of the plasticized region formed by the joining step.
6. In the joining step, the lid plate presses an upper portion of the heat medium pipe by a pressing force of the joining rotary tool, and at least the upper portion of the lid plate and the base member are plastically fluidized. The manufacturing method of the heat exchanger plate of Claim 5 to do.
7. In the straightening step, the planar shape of the locus of the straightening rotary tool is substantially point-symmetric with respect to the center of the base member. The manufacturing method of the heat exchanger plate as described in any one of Claim 5.
8. The said correction | amendment process WHEREIN: The planar shape of the locus | trajectory of the said correction | amendment rotary tool is substantially similar to the shape of the outer edge of the said base member, The range 1st, 2nd, 4th, and The manufacturing method of the heat exchanger plate as described in any one of Claim 5.
9. The planar shape of the locus of the straightening rotary tool in the straightening step is substantially the same as the planar shape of the locus of the joining rotary tool formed on the surface side of the base member. The manufacturing method of the heat exchanger plate as described in any one of 1st term, 2nd term, 4th term, and 5th term.
10. The length of the trajectory of the straightening rotary tool in the straightening step is substantially the same as the total length of the trajectory of the joining rotary tool formed on the surface side of the base member. The manufacturing method of the heat exchanger plate as described in any one of claim | item 2, 2nd term, 4th term | claim, and 5th term | claim.
11. In the straightening step, the total length of the trajectory of the correction rotary tool is shorter than the total length of the trajectory of the bonding rotary tool formed on the surface side of the base member. The manufacturing method of the heat exchanger plate as described in any one of 2nd term, 4th term, and 5th term.
12. An outer diameter of a shoulder portion of the correction rotary tool used in the straightening step is smaller than an outer diameter of a shoulder portion of the bonding rotary tool used in the bonding step. The manufacturing method of the heat exchanger plate as described in any one of Claim 2, 4th, and 5th.
13. The length of the pin of the said rotation tool for correction used in the said correction process is shorter than the length of the pin of the said rotation tool for bonding used in the said joining process, Claims 1 and 2 characterized by the above-mentioned. The manufacturing method of the heat exchanger plate as described in any one of 4th term | claim and 5th term | claim.
14. The thickness of the said base member is 1.5 times or more of the outer diameter of the shoulder part of the said rotary tool for joining, The range of Claims 1, 2, 4, and 5 characterized by the above-mentioned The manufacturing method of the heat exchanger plate as described in any one of Claims.
15. The thickness of the said base member is 3 times or more of the length of the pin of the said rotary tool for joining, The one of the Claims 1st, 2nd, 4th, and 5th Claim characterized by the above-mentioned. The manufacturing method of the heat exchanger plate as described in a term.
16. When the base member has a polygonal shape in plan view, the correction step includes a corner friction stirring step of performing friction stirring on the corner portion of the base member by the correction rotary tool. The method for manufacturing a heat transfer plate according to any one of the first, second, fourth, and fifth ranges.
17. 6. The method according to claim 2, further comprising an annealing step of annealing the heat transfer plate by energizing the heater after the straightening step when a heater is provided in the heat medium pipe. The manufacturing method of the heat exchanger plate as described in 2.
18. The chamfering step of chamfering the back side of the base member after the straightening step, wherein the depth of the chamfering is larger than the length of the pin of the straightening rotary tool. The method for manufacturing a heat transfer plate according to any one of the first, second, fourth, and fifth ranges.
19. A lid groove closing step of inserting a lid plate into the lid groove formed around the concave groove opening on the surface side of the base member;
    A joining step in which friction stir is performed by relatively moving the joining rotary tool along the abutting portion between the side wall of the lid groove and the side surface of the lid plate;
    A correction step of correcting a warp convex on the back surface side of the base member formed by the bonding step by applying a bending moment that generates a tensile stress on the front surface side of the base member. The manufacturing method of the heat exchanger plate characterized by these.
20. A heat medium tube insertion step of inserting the heat medium tube into the concave groove formed in the bottom surface of the lid groove opening on the surface side of the base member;
    A lid groove closing step of inserting a lid plate into the lid groove;
    A joining step in which friction stir is performed by relatively moving the joining rotary tool along the abutting portion between the side wall of the lid groove and the side surface of the lid plate;
    A correction step of correcting a warp convex on the back surface side of the base member formed by the bonding step by applying a bending moment that generates a tensile stress on the front surface side of the base member. The manufacturing method of the heat exchanger plate characterized by these.
21. 21. The heat transfer plate according to claim 20, wherein in the joining step, a plastic fluidized material fluidized by frictional heat is caused to flow into a gap formed around the heat medium pipe. Manufacturing method.
22. A lid plate insertion step of inserting the lid plate into the concave groove opened on the surface side of the base member;
    A joining step of performing frictional stirring by relatively moving the joining rotary tool along the concave groove;
    A correction step of correcting a warp convex on the back surface side of the base member formed by the bonding step by applying a bending moment that generates a tensile stress on the front surface side of the base member. The manufacturing method of the heat exchanger plate characterized by these.
23. A heat medium pipe insertion step of inserting the heat medium pipe into the concave groove opened on the surface side of the base member;
    A lid plate insertion step of inserting a lid plate into the concave groove;
    A joining step of performing frictional stirring by relatively moving the joining rotary tool along the concave groove;
    A correction step of correcting a warp convex on the back surface side of the base member formed by the bonding step by applying a bending moment that generates a tensile stress on the front surface side of the base member. The manufacturing method of the heat exchanger plate characterized by these.
24. In the joining step, the lid plate presses the upper part of the heat medium pipe by the pressing force of the joining rotary tool, and at least the upper part of the lid plate and the base member are frictionally stirred. A method for manufacturing a heat transfer plate according to claim 23.
25. 24. The correction according to any one of claims 19, 20, 22, and 23, wherein the warping is corrected by press-correcting the base member in the correction step. Manufacturing method of heat transfer plate.
26. In the correction step, the first auxiliary member that contacts the vicinity of the center of the back surface side of the base member is disposed, and the second auxiliary member and the third auxiliary member that contact the vicinity of the peripheral edge of the surface side of the base member are 26. The method for manufacturing a heat transfer plate according to claim 25, wherein the warp is press-corrected in a state where the warp is disposed on both sides of the first auxiliary member.
27. The method for manufacturing a heat transfer plate according to claim 26, wherein each auxiliary member is made of a material having a hardness lower than that of the base member.
28. The said correction process WHEREIN: The said curvature is correct | amended by roll-correcting the said base member, The Claim 19, The 20th, 22nd, and 23rd Claim characterized by the above-mentioned. Manufacturing method of heat transfer plate.
29. In the correction step, the first auxiliary member that contacts the vicinity of the center of the back surface side of the base member is disposed, and the second auxiliary member and the third auxiliary member that contact the vicinity of the peripheral edge of the surface side of the base member are The method for manufacturing a heat transfer plate according to claim 28, wherein the warp is roll-corrected in a state in which the first auxiliary member is disposed on both sides of the first auxiliary member.
30. The method for manufacturing a heat transfer plate according to claim 29, wherein each auxiliary member is made of a material having a hardness lower than that of the base member.
31. 24. Any one of claims 19, 20, 22, and 23, wherein, in the correction step, the warp is corrected by hitting the base member with a hitting tool. The manufacturing method of the heat exchanger plate as described in one term.
32. In the correction step, the first auxiliary member that contacts the vicinity of the center of the back surface side of the base member is disposed, and the second auxiliary member and the third auxiliary member that contact the vicinity of the peripheral edge of the surface side of the base member are 32. The method for manufacturing a heat transfer plate according to claim 31, wherein the warp is corrected in a state where the first auxiliary member is disposed on both sides of the first auxiliary member.
33. The method for manufacturing a heat transfer plate according to claim 32, wherein each auxiliary member is made of a material having a hardness lower than that of the base member.
34. The heat transfer according to any one of claims 19, 20, 22, and 23, further comprising an annealing step of annealing the heat transfer plate after the straightening step. A manufacturing method of a board.
35. 21. The method according to claim 20, further comprising an annealing step in which a heater is disposed inside the heat medium pipe, and the heater is energized after the straightening step to anneal the heat transfer plate. 24. A method for producing a heat transfer plate according to item 23.

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