JP5071144B2 - Manufacturing method of heat transfer plate - Google Patents

Description

  The present invention relates to a method for manufacturing a heat transfer plate used in, 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, a method described in Patent Document 1 is known. Figure 2 3 is a sectional view showing a heat transfer plate formed by the manufacturing method of the heat transfer plate according to Patent Document 1. The heat transfer plate 100 according to Patent Document 1 includes a base groove 102 having a lid groove 106 having a rectangular cross-sectional view opening on the surface, a concave groove 108 opening on the bottom surface of the lid groove 106, and heat inserted into the concave groove 108. A medium 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.

JP 2004-314115 A

Since the heat transfer plate 100 formed by such a method of manufacturing a heat transfer plate performs frictional stirring only from the surface side of the base member 102, the heat transfer plate warps when the plasticized regions W and W are contracted by heat shrinkage. There was a problem of bending.
From such a viewpoint, an object of the present invention is to provide a method of manufacturing a heat transfer plate that can manufacture a heat transfer plate with high flatness.

  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 And a straightening step of stirring.

  According to this manufacturing method, since the friction stir is performed also from the back surface side of the base member, the warp generated by the friction stir performed on the surface can be eliminated, and the flatness of the heat transfer plate can be improved.

  In the present invention, it is preferable that the volume amount of the plasticized region formed by the correction step is smaller than the volume amount of the plasticized region formed by the joining step. According to this manufacturing method, the flatness of the manufactured heat transfer plate can be further improved.

  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, and the volume amount of the plasticized region formed by the correction step is preferably smaller than the volume amount of the plasticized region formed by the joining step .

  According to this manufacturing method, since the friction stir is performed also from the back surface side of the base member, the warp generated by the friction stir performed on the surface can be eliminated, and the flatness of the heat transfer plate can be improved. Moreover, since the volume amount of the plasticization area | region in a correction process is smaller than the volume amount of the plasticization area | region of the said joining process, the flatness of the manufactured heat exchanger plate can be improved more.

  In the present invention, it is preferable that, 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.

  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.

  Further, the present invention provides a lid plate insertion 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 rotary tool for joining along the concave groove. And a straightening step of performing frictional stirring from the back side of the base member using a straightening rotary tool.

  According to this manufacturing method, since the friction stir is performed also from the back surface side of the base member, the warp generated by the friction stir performed on the surface can be eliminated, and the flatness of the heat transfer plate can be improved.

  In the present invention, it is preferable that the volume amount of the plasticized region formed by the correction step is smaller than the volume amount of the plasticized region formed by the joining step. According to this manufacturing method, the flatness of the manufactured heat transfer plate can be further improved.

  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 this manufacturing method, since the friction stir is performed also from the back surface side of the base member, the warp generated by the friction stir performed on the surface can be eliminated, and the flatness of the heat transfer plate can be improved. Moreover, since the volume amount of the plasticization area | region in a correction process is smaller than the volume amount of the plasticization area | region of the said joining process, the flatness of the manufactured heat exchanger plate can be improved more.

  In the joining step, 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 plastically flowed. Is preferable.

  According to this manufacturing method, since frictional stirring is performed while pushing the upper portion of the heat medium pipe with the lid member, the gap around the heat medium pipe can be reduced, and thus the thermal conductivity can be improved.

  In the correction process according to the aspect of the invention, it is preferable that the shape of the locus of the correction rotary tool is substantially point symmetric with respect to the center of the base member. In the correction process according to the aspect of the invention, it is preferable that the shape of the trajectory of the correction rotary tool is substantially similar to the shape of the outer edge of the base member. In the correction step, the shape of the locus of the correction rotary tool is preferably substantially the same as the shape of the connection rotary tool formed on the surface side of the base member. In the present invention, it is preferable that, in the correction step, the total length of the trajectory of the correction rotary tool is substantially the same as the total length of the trajectory of the bonding rotary tool formed on the surface side of the 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 with a good balance, the flatness of the heat transfer plate can be improved.

  In the present invention, it is preferable that 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. In the present invention, it is preferable that an outer diameter of a shoulder portion of the correction rotary tool used in the correction step is smaller than an outer diameter of a shoulder portion of the bonding rotary tool used in the bonding step. Moreover, it is preferable that the length of the pin of the said correction rotary tool used at the said correction process is shorter than the length of the pin of the said rotation tool used at the said connection process. 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 further increased. be able to.

  In the present invention, it is preferable that a thickness of the base member is 1.5 times or more an outer diameter of a shoulder portion of the rotating tool for joining. In the present invention, it is preferable that the thickness of the base member is three times or more the length of the pin of the rotating tool for joining.

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

  In addition, the present invention may include a corner friction stirring step in which, when the base member is a planar polygon, the cornering of the base member is subjected to friction stirring by the correction rotating tool in the correction step. preferable. According to this manufacturing method, the warp generated at the corner of the base member can be eliminated and the flatness of the heat transfer plate can be eliminated.

  Moreover, when providing a heater inside the said heat | fever medium pipe | tube, it is preferable to energize the said heater after the said correction process, and to include the annealing process which anneals the said heat exchanger plate. According to this manufacturing method, the internal stress remaining in the plasticized region can be removed to eliminate the warp of the heat transfer plate.

  In addition, the present invention includes a chamfering process of chamfering the back surface side of the base member after the correction process, and the depth of the chamfering process is greater than the length of the pin of the rotating tool for correction. Is preferred. According to this manufacturing method, the back surface of the heat transfer plate can be formed smoothly.

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

[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 serves to transmit the heat of the heat medium flowing through the heat medium pipe 20 to the outside, or to play a role of transferring external heat to the heat medium flowing through the heat medium pipe 20. As shown to (a) and (b) of FIG. 2, the base member 2 is a rectangular parallelepiped which exhibits a square in plan view, and in this embodiment, a 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-sectional view. In the present embodiment, the heat medium pipe 20 is made of copper and has a horseshoe shape in plan view. Since the outer diameter B of the heat medium pipe 20 is formed to be approximately equal to the width A of the groove 8 and the depth C of the groove 8, the heat medium pipe 20 is disposed in the groove 8. The lower half of the working tube 20 and the bottom surface 7 of the groove 8 are in surface contact, and the upper end of the heat medium tube 20 is in contact with the lower surface 12 of the lid plate 10.
In the present embodiment, a microheater is inserted into the heat medium pipe 20, but for example, a heat medium such as cooling water, cooling gas, high-temperature liquid, or high-temperature gas is circulated to circulate the heat medium. The heat may be transmitted to the base member 2 and the cover plate 10 or the heat of the base member 2 and the cover plate 10 to the heat medium.

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

  As shown in FIGS. 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.

  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 J1, and the lid groove 6 and the outer edge of the lid plate 10 are abutted. 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 surface F11 of the shoulder portion F1 is a portion that plays a role of pressing the plastic fluidized metal and preventing scattering to the surroundings, and is formed in a concave shape in this 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).

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 cylindrical shoulder portion G1 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 joining rotary tool F. The stirring pin G2 hangs down from the center of the lower end surface G11 of the shoulder portion G1, 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 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 (c) of FIG. 6, the surface plasticizing region W1 (W1a, W1b) is formed along the abutting portion J1 and the abutting portion J2 by the main 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 step 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. Thereby, the heat exchanger plate 1 may bend so that the surface Za side may become concave. In particular, among the points a to j shown on the surface Za of the heat transfer plate 1, at the points a, c, f, and h related to the four corners of the heat transfer plate 1, the influence of the warp tends to be noticeable. In addition, the point j shows the center point of the heat exchanger plate 1.

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

  In the tab material arranging step, as shown in FIG. 8, a tab material 31 for setting a start position and an end position of a correction friction stirring step 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 by using the correction rotation tool G as shown in FIGS. In this embodiment, the route of the straightening friction stirring step is set so as to surround the 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 portion of the shoulder portion G1 of the correction rotary tool G comes into contact with the tab material 31, the correction rotary tool G is relatively moved toward the base member 2. And it becomes convex in the vicinity of the point f ′, the point a ′, the point c ′, and the point h ′ on the back surface Zb of the base member 2 and is concave in the vicinity of the point g ′, the point d ′, the point b ′, and the point e ′. Friction stirring is performed by relatively moving the correction rotary tool G so that That is, as shown in FIG. 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 bent due to thermal contraction in the main joining step, the surface Zb is also subjected to friction stirring on the back surface Zb of the base member 2. The warp generated in Za can be eliminated and the flatness of the heat transfer plate 1 can be 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 | amendment process in this embodiment moves the rotation tool G for correction | amendment in the way of one-stroke writing, work efficiency can be improved.

[First modification]
In the first embodiment, even if friction agitation is performed in the joining step, a gap is formed around the heat medium pipe 20. Therefore, as in the first modification shown in FIGS. 9 and 10, the plastic fluid material may be allowed to flow into the gap formed around the heat medium pipe 20 to fill the gap.

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, by pressing the welding rotary tool F at a predetermined depth and performing frictional stirring, the plastic fluidized material can be caused to flow into the gaps P and P formed around the heat medium pipe 20. Thereby, as shown in FIG. 10, since the circumference | surroundings of the pipe | tube 20 for heat media are sealed with the plasticized metal, the heat-transfer plate 1 with high heat conductivity 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 P 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.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the description of the second 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 second embodiment, the width of the cover plate may be set small, and the heat transfer plate may be formed so that only a single plasticized region is formed.

  As shown in FIGS. 11 and 12, the heat transfer plate 41 manufactured according to the second 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 cover plate 42 is a member that has a rectangular cross-sectional view and a meandering shape in plan view, and is a member that is inserted into the 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 second embodiment will be described.
The manufacturing method of the heat transfer plate according to the second 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). That is, when the joining rotary tool F is pushed into the start position _SM4 set on the tab member 33 and the shoulder portion F1 contacts the base member 2, the joining rotary tool F is relatively moved along the cover plate 42, and the tab Friction stirring is continuously performed up to the end position E _M4 set for the material 34. 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, along the center of the cover plate 42 When the rotating tool F for joining is moved, 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 P currently formed in the circumference | surroundings of the pipe | tube 21 for heat media can be reduced, the heat transfer property 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.

  FIG. 15 is a perspective view 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 bent 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 at 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). As shown in FIG. 16B, the back surface plasticized regions W41 to W44 formed by the correction friction stirring step are formed so as 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 this 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, since the back surface plasticization area | regions W41-W44 formed in the back surface Zb of the base member 2 are removed, the uniformity of the property of the base member 2 can be aimed at. Moreover, since the back surface plasticization area | region W42 is not exposed to the back surface Zb, it is suitable also for designability etc.

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 rotation tool G for correction provided with the stirring pin G2, you may perform the correction process using the rotation tool G for correction that does not include 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 second embodiment described above, the abutting portions J3 and J4 between the cover plate 42 and the groove 43 can be frictionally stirred by a single movement of the joining rotary tool F. Compared with this, the labor required can be greatly reduced. 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. .

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be appropriately changed without departing from the spirit of the present invention.
For example, the correction process is not limited to the friction stir route of the first embodiment and the second embodiment 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.

[Second modification]
For example, as in the second modification shown in FIGS. 18 and 19, the friction stirrer according to the correction process is performed so that the plasticized regions formed on the front surface side and the back surface side of the heat transfer plate have substantially the same shape. A route may be set. FIG. 18 is a partially broken plan view of the front surface side of the heat transfer plate according to the second modification of the present invention, and FIG. 19 is a plan view of the back surface side of the heat transfer plate according to the second modification of the present invention. FIG. In the second modified example, the description of the same points as those in the first embodiment and the second embodiment is omitted.

  A heat transfer plate 51 shown in FIG. 18 includes a base member 2 having an opening 52 in the center, a heat medium pipe 53 embedded in a groove (not shown) cut out in the base member 2, and a groove. And a lid plate 54 that closes the door.

  The heat medium pipe 53 is embedded in the base member 2 so as to have a cross shape with a 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. That is, heat is supplied from one end of the heat medium pipe 53 appearing in the opening 52 and is discharged from the other end to be transmitted to the base member 2.

  The abutting portion between the cover 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 method according to the second embodiment. Thereby, the surface plasticization region W50 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. 19, the back surface Zb of the heat transfer plate 51 is formed with a back surface plasticized region W51 so as to exhibit a hollow shape in a plan view, similarly to the surface Za. The starting position and the ending position of friction stirring in the correction process are set at an arbitrary point on the base member 2. In addition, the back surface plasticizing region W51 is friction-stirred in the manner of one-stroke writing using the correction rotating tool G.

As in the second modification, the friction stirrer according to the correction process is performed so that the surface plasticized region W50 and the back plasticized region W51 formed on the front surface Za and the back surface Zb of the heat transfer plate 51 respectively have substantially the same shape. A route may be set. According to the joining step and the straightening step, since the shapes of the plasticized regions formed on the front surface Za side and the back surface Zb side of the heat transfer plate 51 are substantially equal, the warpage of the heat transfer plate 1 is eliminated in a balanced manner. Flatness can be improved.
According to the second modification, 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.

[Third to Eighth Modifications]
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. 20 is a plan view of the back side of the heat transfer plate, where (a) is a third modification, (b) is a fourth modification, (c) is a fifth modification, and (d) is a sixth modification. For example, (e) shows a seventh modification, and (f) shows an eighth modification.

  The trajectories (back surface plasticization region W2) of the correction rotary tool of the third and fourth modifications shown in FIGS. 20A and 20B all surround the center point j ′ of the base member 2. It is characterized by being formed. The third 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 4th modification shown in FIG.20 (b).

  The trajectories (back surface plasticizing region W2) of the correction rotating tools of the fifth and sixth modifications shown in FIGS. 20C and 20D both pass through the center point j ′ of the base member 2. It is characterized by being formed radially. The fifth 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 fifth modified example can be formed in the manner of one-stroke writing, work efficiency can be improved. The sixth modification shown in FIG. 20D is formed so as to pass through the central point j ′ and to be parallel to the diagonal line of the base member 2.

  The trajectory (back surface plasticization region W2) of the correction rotary tool of the seventh and eighth modifications shown in FIGS. 20 (e) and (f) is an area divided by a straight line passing through the central point j ′. Four trajectories having the same shape are formed independently, and trajectories that are diagonally opposed across the central point j ′ are formed to be 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.
[Example]

  Next, examples of the present invention will be described. In the embodiment according to the present invention, as shown in FIGS. 21 (a) and 21 (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 that is square in plan view, and the surface Za 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 size of 500 mm × 500 mm in plan view, 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.

  As the rotation tool, a rotation tool having the same size was used on 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 base size (maximum diameter) of the stirring pin is 9 mm, and the tip size (minimum diameter) of the stirring pin 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. Each measurement result in the said Example is shown in the following Tables 1-4.

  Table 1 is a table showing measured values when the plate 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 of (after FSW−before FSW) at each point. The lowermost 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 height difference between the central point j ′ (reference j ′) and each point (a ′ to h ′) before the friction stir.
As shown in FIG. 22, “FSW1” indicates a difference in height between the reference j ′ and each point after the frictional stirring of the small circle (radius r1) is performed 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 the 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) with the reference j ′ as zero. “Back side deformation amount 2” indicates a value (before FSW2−FSW) at each point. The bottom column of “back side deformation amount 2” indicates an average value of the points a to h.
“FSW3” indicates a difference in height between the reference j ′ and each point after performing frictional stirring of the great circle (radius r3) with the reference j ′ as zero. "Back side deformation amount 3" indicates the value of (before FSW3-FSW) at each point. The bottom column of “back side deformation amount 3” indicates an average value of the points a to h.

  Table 3 is a table showing the measured values when the plate 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 the measured values when the plate thickness of the base member is 60 mm and friction 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 friction stir by a locus of a circle smaller than the small circle, that is, with a processing degree lower than that on the surface side.

  When the average value (0.98) of “front side deformation amount” in Table 3 is compared 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.

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 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 1st modification. It is sectional drawing which showed the 1st modification. It is the perspective view which showed the heat exchanger plate which concerns on 2nd embodiment. It is the disassembled perspective view which showed the heat exchanger plate which concerns on 2nd embodiment. It is the exploded sectional view showing the heat exchanger plate concerning a second embodiment. In the manufacturing method of the heat exchanger plate which concerns on 2nd 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 2nd 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 2nd 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 2nd embodiment in the III-III line cross section of FIG. It is a partially broken top view of the surface side of the heat exchanger plate which concerns on a 2nd modification. It is a top view of the back surface side of the heat exchanger plate which concerns on a 2nd modification. It is a top view of the back surface side of a heat exchanger plate, (a) is a 3rd modification, (b) is a 4th modification, (c) is a 5th modification, (d) is a 6th modification, (e ) Shows a seventh modification, and (f) shows an eighth modification. 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 Cover groove 8 Concave groove 10 Cover plate 20 Heat medium pipe F Joining rotary tool G Straightening rotary tool J Butt part P Gap part W Plasticization area Za Surface Zb Back surface

Claims (20)

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;
And a straightening step in which friction stir is performed from the back side of the base member using a straightening rotary tool.   2. The method for manufacturing a heat transfer plate according to claim 1, 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. 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. The method for manufacturing a heat transfer plate according to claim 3, 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. . 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;
And a straightening step in which friction stir is performed from the back side of the base member using a straightening rotary tool.   The method for manufacturing a heat transfer plate according to claim 5, 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. 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.   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 7.   9. The transmission according to claim 1, wherein in the straightening process, a shape of a locus of the straightening rotary tool is substantially point-symmetric with respect to a center of the base member. Manufacturing method of hot plate.   10. The transmission according to claim 1, wherein, in the straightening process, a shape of a locus of the straightening rotary tool is substantially similar to a shape of an outer edge of the base member. Manufacturing method of hot plate.   The trajectory shape of the straightening rotary tool in the straightening step is substantially the same as the trajectory shape of the joining rotary tool formed on the surface side of the base member. Item 11. A method for manufacturing a heat transfer plate according to any one of Items 10 to 10.   The total length of the locus of the rotary tool for correction is substantially the same as the total length of the locus of the rotary tool for bonding formed on the surface side of the base member in the correction step. Item 12. The method for manufacturing a heat transfer plate according to any one of Items 11 to 11.   The length of the trajectory of the straightening rotary tool is shorter than the total length of the trajectory of the joining rotary tool formed on the surface side of the base member in the straightening step. The manufacturing method of the heat exchanger plate as described in any one of these.   14. The outer diameter of the shoulder portion of the correction rotating tool used in the correction step is smaller than the outer diameter of the shoulder portion of the bonding rotation tool used in the bonding step. The manufacturing method of the heat exchanger plate as described in any one of Claims.   15. The length of the pin of the rotary tool for correction used in the straightening process is shorter than the length of the pin of the rotary tool for bonding used in the bonding process. 15. The manufacturing method of the heat exchanger plate as described in a term.   The thickness of the said base member is 1.5 times or more of the outer diameter of the shoulder part of the said rotation tool for joining, The heat exchanger plate as described in any one of Claims 1 thru | or 15 characterized by the above-mentioned. Production method.   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, The manufacturing method of the heat exchanger plate as described in any one of the Claims 1 thru | or 16 characterized by the above-mentioned.   When the base member is a polygon in a plan view, the straightening 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 manufacturing method of the heat exchanger plate as described in any one of Claim 1 thru | or 17.   8. The method according to claim 3, further comprising an annealing step of annealing the heat transfer plate by energizing the heater after the straightening step when a heater is provided inside the heat medium pipe. 9. Manufacturing method of heat transfer plate. 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 manufacturing method of the heat exchanger plate as described in any one of Claim 1 thru | or 19.

Images