JP2012213809A - Method for manufacturing heat transfer plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing heat transfer plate capable of easily manufacturing a heat transfer plate having high flatness.SOLUTION: The method is characterized by including a heat medium tube insertion step of inserting a tube for heat medium 20 into a recessed groove 4 formed in the bottom surface of a lid groove 3 that opens on the front surface side of a base member 2, a lid groove closing step of inserting a lid plate 10 into the lid groove 3, and a joining step of relatively moving a rotary tool for joining F along an abutting part J2 of the sidewall of the lid groove 3 and the side surface of the lid plate 10 to perform friction stirring, wherein in the joining step, friction stirring is performed in the state where a cooling plate 60 is provided on the back side of the base member 2 and at the same time, into a gap part 22 formed around the tube for heat medium 20, a plastic flow material fluidized by friction heat is caused to flow.

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 concave groove that circulates a heat medium such as high-temperature liquid or cooling water in a base member that is a main body thereof. ing. As a method for manufacturing such a heat transfer plate, for example, a method described in Patent Document 1 is known. FIG. 26 is a cross-sectional view showing a heat transfer plate formed by the method of manufacturing a heat transfer plate according to Patent Document 1.

  A heat transfer plate 100 according to Patent Document 1 includes a base member 102 having a lid groove 106 having a rectangular cross-sectional view opened on the surface and a groove 108 opened on the bottom surface of the cover groove 106, and heat inserted into the 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 integrally 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. Thus, plasticized regions W and W plasticized by friction stirring are formed in the abutting portions J and J of the heat transfer plate 100, respectively.

  As shown in FIG. 26, the heat transfer plate 100 formed by such a method of manufacturing a heat transfer plate performs frictional stirring from the surface of the base member 102, so that the heat transfer plate warps and bends due to thermal contraction and thermal expansion. There was a problem.

  Therefore, in order to solve such a problem, Patent Document 2 discloses a technique in which water is injected by a cooling nozzle to a place where friction stir welding is performed, and a joint portion after friction stir welding is pressed with a roller. Has been.

JP 2004-314115 A JP 2001-87871 A

  However, in the invention according to Patent Document 2, since water is sprayed to the place where friction stir welding is performed, water may enter the friction stirrer, which may adversely affect the drive system. In addition, since water is jetted to the joint portion, there is a problem that water is scattered around due to the rotation of the rotary tool, and water management becomes complicated.

  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.

    The present invention that solves such a problem 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 on the surface side of the base member, and the cover groove. A lid groove closing step of inserting the lid plate, and a joining step of performing frictional stirring by relatively moving the joining rotary tool along the abutment portion between the side wall of the lid groove and the side surface of the lid plate, In the joining step, the friction stir is performed with a cooling plate provided on the back side of the base member, and a plastic fluidized material fluidized by frictional heat is formed in the gap formed around the heat medium pipe. It is made to flow in.

  According to this manufacturing method, since the friction stir welding is performed while the base member is cooled by the cooling plate, it is possible to prevent the heat transfer plate from being warped or bent due to thermal expansion and thermal contraction. Further, by using a cooling plate, for example, management of a heat medium such as water is easy, so that the joining operation can be performed relatively easily. Moreover, a heat-transfer plate with high airtightness and watertightness can be manufactured by allowing the plastic fluidizing material to flow around the heat medium pipe.

  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 of performing friction stir by relatively moving the rotating tool for joining along the groove, and in the joining step, friction stir is performed in a state where a cooling plate is provided on the back side of the base member, and the joining is performed. The cover plate presses the upper part of the heat medium pipe by the pressing force of the rotary tool for use, and at least the upper part of the cover plate and the base member are frictionally stirred.

  According to this manufacturing method, since the friction stir welding is performed while the base member is cooled by the cooling plate, it is possible to prevent the heat transfer plate from being warped or bent due to thermal expansion and thermal contraction. Further, by using a cooling plate, for example, management of a heat medium such as water is easy, so that the joining operation can be performed relatively easily. In addition, since the heat medium pipe and the base member can be brought into close contact with each other, a gap around the heat medium pipe can be reduced, and water tightness and air tightness can be improved.

  Further, in the joining step, it is preferable to perform friction stir while cooling the base member and the cover plate by flowing a heat medium through the heat medium pipe inserted into the concave groove of the base member. According to this manufacturing method, in the joining step, the cooling efficiency of the heat transfer plate can be further improved by performing frictional stirring while flowing the heat medium also to the heat medium pipe embedded in the heat transfer plate. .

  Further, in the joining step, it is preferable to perform friction stirring while cooling the cooling plate by flowing the heating medium through a flow path formed in the cooling plate or a heat medium pipe embedded in the cooling plate. . In addition, the planar shape of the flow path formed in the cooling plate or the planar shape of the heat medium pipe embedded in the cooling plate is formed to be substantially equivalent to or substantially similar to the planar shape of the concave groove. It is preferable.

  According to this manufacturing method, since the heat medium flows through the flow path formed in the cooling plate or the heat medium pipe embedded in the cooling plate, the management of the heat medium becomes easy. Further, by forming the planar shape of the flow path and the heat medium pipe into a shape substantially equivalent to or substantially similar to the planar shape of the concave groove of the base member, a plasticized region formed by friction stirring in the joining step Therefore, the cooling efficiency of the heat transfer plate can be increased.

  According to the heat transfer plate manufacturing method of the present invention, a heat transfer plate having 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 pipe | tube insertion process for heat media, (c) shows a cover groove | channel obstruction | occlusion process. . It is the side view which showed the rotation tool for joining. In the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, it is the perspective view which showed the heat exchanger plate and the cooling plate. 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 sectional drawing of the line which connects the point c and the point f It is. It is the perspective view which showed the preparatory stage of the press correction which concerns on 1st embodiment. It is the side view which showed the press correction which concerns on 1st embodiment, Comprising: (a) is before a press, (b) is the figure which showed during press. It is the top view which showed the press position of the press correction which concerns on 1st embodiment. It is the figure which showed the roll correction which concerns on 1st embodiment, Comprising: (a) is a perspective view, (b) is the side view which showed before the press, (c) is the side view which showed during the press. It is sectional drawing which showed the manufacturing method of the heat exchanger plate which concerns on 2nd embodiment. (A) is the perspective view which showed the heat exchanger plate and cooling plate which concern on 3rd embodiment, (b) is the II-II sectional view taken on the line of (a). It is sectional drawing which showed the joining process in the manufacturing method of 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 III-III 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 sectional drawing of the line which ties the point c and the point f It is. It is sectional drawing which showed the manufacturing method of the heat exchanger plate which concerns on 5th embodiment. (A) is the perspective view which showed the test body based on an Example, (b) is the IV-IV sectional view taken on the line of (a), (c) is the rotation tool for joining used in the Example. It is the side view which showed. 6 is a side view showing a joining process according to Test 1. FIG. It is the side view which showed the joining process of the test body which concerns on Test 1. FIG. 10 is a side view showing a joining process according to Test 2. FIG. It is the side view which showed the joining process of the test body which concerns on the test 2. FIG. It is sectional drawing which showed the heat exchanger plate formed by the manufacturing method of the heat exchanger plate concerning patent document 1. FIG.

[First embodiment]
A first 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 in FIGS. 2A and 2B, the base member 2 is a rectangular parallelepiped having a square shape in plan view, and in this embodiment, the base member 2 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 lid groove 3 is recessed in the surface Za of the base member 2, and a recessed groove 4 narrower than the lid groove 3 is recessed in the center of the bottom surface 3 c of the lid groove 3.

  As shown in FIGS. 2A and 2B, the lid groove 3 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. ing. The lid groove 3 has a rectangular shape in cross section, and includes side walls 3 a and 3 b that rise vertically from the bottom surface 3 c of the lid groove 3.

  The concave groove 4 is a portion into which the heat medium pipe 20 is inserted, and is formed in the central portion of the bottom surface 3 c of the lid groove 3 over the entire length of the lid groove 3. The concave groove 4 is a U-shaped groove that is open at the top, and has a bottom surface 5 that is semicircular in cross-section at the lower end. The width A of the opening portion of the concave groove 4 and the depth C of the concave groove 4 are formed substantially equal to the outer diameter B of the heat medium pipe 20. Further, the width E and the depth G of the lid groove 3 are formed substantially equal to the width and thickness of the lid plate 10.

  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 substantially horseshoe shape in plan view. Since the outer diameter B of the heat medium pipe 20 is formed substantially equal to the width A of the groove 4 and the depth C of the groove 4, the heat medium pipe 20 and the cover plate 10 are arranged on the base member 2. Then, the lower half of the heat medium pipe 20 and the bottom surface 5 of the groove 4 come into surface contact, and the upper end of the heat medium pipe 20 comes into 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 groove 4.

  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 3 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 thickness of the lid plate 10 is formed substantially equal to the depth G of the lid groove 3. Further, since the width of the lid plate 10 is formed substantially equal to the width E of the lid groove 3, when the lid plate 10 is arranged in the lid groove 3, the side surfaces 13 a and 13 b of the lid plate 10 are The side walls 3a and 3b are in surface contact with each other or face each other with a fine gap.

  In this embodiment, the groove 4 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. That is, the width A and the depth C of the groove 4 may be formed larger than the outer diameter B of the heat medium pipe 20. Further, in the present embodiment, the lid groove 3, the concave groove 4, the lid plate 10 and the heat medium pipe 20 are formed so as to exhibit a substantially horseshoe shape in a plan view, but the present invention is not limited thereto. What is necessary is just to design suitably according to the 1 use.

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, as shown in FIG. 3A, the cover groove 3 and the concave groove 4 are formed on the surface Za of the base member 2 with a predetermined width and depth. 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 groove 4 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 3 to close the lid groove 3. Here, in the abutting surface of the lid groove 3 and the lid plate 10, a portion abutted by the lid groove 3 and the inner edge of the lid plate 10 is referred to as “butting portion J <b> 1”, and the lid groove 3 and the outer edge of the lid plate 10 are The faced portion is referred to as “butting portion J2”.

(4) Joining process In the joining process, as shown in FIG. 5, friction stir using the rotating tool F for joining along the abutting portions J <b> 1 and J <b> 2 with the base member 2 disposed on the upper surface of the cooling plate 60. I do. 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 joining rotary tool F used in the joining process in the present embodiment will be described in detail.
As shown in FIG. 4, the joining rotary tool F is made of a metal material harder than the base member 2 such as tool steel, and protrudes from a shoulder portion F1 having a columnar shape and a lower end surface F11 of the shoulder portion F1. And a stirring pin (probe) F2. What is necessary is just to set the dimension and shape of the rotation tool F for joining according to the material, thickness, etc. of the base member 2. FIG.

  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. 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.

The thickness t of the base member 2 shown in FIG. 4, it is preferable for the 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.

  Next, the cooling plate 60 used in this embodiment will be described. As shown in FIG. 5, the cooling plate 60 includes, for example, a flat plate 61 made of an aluminum alloy, a flow path 63 formed inside the flat plate 61, and a heat medium pipe 62 embedded in the flow path 63. The cooling plate 60 functions as a support base that receives the pressing force of the welding rotary tool F during friction stirring, and cools the object by flowing a coolant such as water or air through the heat medium pipe 62.

  In addition, about the structure of the cooling plate 60, it is not limited to the form of this embodiment, What is necessary is just to set a material, a shape, etc. suitably. Alternatively, the heat medium pipe 62 may be used for cooling by directly flowing the heat medium through the flow path 63.

In the first joining step, as shown in FIGS. 5 and 6A and 6B, the abutting portion between the base member 2 and the lid plate 10 in a state where a heat medium (water) is passed through the cooling plate 60. Friction stirring is performed along J1.
First, the base member 2 is placed on the cooling plate 60, and the base member 2 is fixed so as not to move. Then, the start position _SM1 is set at an arbitrary position on the surface Za of the base member 2, and the stirring pin F2 of the 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 of 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. In the present embodiment, the joining process is performed while flowing the heat medium through the heat medium pipe 62 of the cooling plate 60 and cooling it. However, for example, a heat medium such as water is applied to the heat medium pipe 20 of the heat transfer plate 1. The joining process may be performed by pouring. Thereby, cooling efficiency can be raised more.

  As shown in FIG. 6C, the 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 this embodiment, the depth of the plasticized region W1 is substantially equal to the depth of the side walls 3a and 3b of the lid groove 3 (see FIG. 2B). Since it is formed, 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. The plasticizing region includes both the state heated by the frictional heat of the welding rotary tool F and actually plasticized, and the state where the welding rotary tool F passes and returns to room temperature.

  Here, FIG. 7 is a perspective view of the heat transfer plate 1 after the joining step of the present embodiment. The heat transfer plate 1 has a plasticized region W1 formed by a joining process. In the present embodiment, by arranging the cooling plate 60 on the back side of the base member 2, it is possible to reduce warpage and bending of the heat transfer plate due to thermal expansion and contraction, but it is difficult to completely eliminate the bending. is there. That is, since the plasticized region W1 shrinks due to thermal contraction, a compressive stress acts from the corner side of the base member 2 toward the center side on the surface Za side of the heat transfer plate 1. Thereby, the heat exchanger plate 1 may bend so that the surface Za side may be concave (so that it may be convex on the back surface Zb side). 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. The point j indicates the center point of the heat transfer plate 1, and the points b, d, e, and g indicate intermediate points on each side of the base member 2. Further, the points on the back surface Zb corresponding to the points a to j indicated on the front surface Za of the heat transfer plate 1 are defined as points a ′ to j ′. Further, the direction from the point a to the point f of the heat transfer plate 1 is the vertical direction, and the direction from the point a to the point c is the horizontal direction.

(5) Straightening process In the straightening process, a bending moment that generates a tensile stress is applied from the back surface Zb of the heat transfer plate 1 (base member 2) to the surface Za side of the base member 2, and the above-described joining process is performed. The warp of the formed heat transfer plate 1 is corrected. In the correction process, one or more methods may be selected from the following three methods: press correction, impact correction, and roll correction. First, press correction will be described.

(5-1) Press Correction When the joining process described above is completed, burrs generated by friction stirring are removed, and as shown in FIG. 8, the heat transfer plate 1 is turned over so that the back surface Zb faces upward, and the back surface Zb The plate-like first auxiliary member T1 is disposed at the center point j ′ (see FIG. 7B). 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.

  If each auxiliary member is arrange | positioned, as shown to (a) and (b) of FIG. 9, it will press from the back surface Zb of the heat exchanger plate 1 using the well-known press apparatus P. FIG. That is, the punch Pa of the press 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. 9A and 9B, 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 pressing device may be appropriately set depending on the thickness and material of the heat transfer plate 1, but as shown in FIG. 9B, the surface Za side of the heat transfer plate 1 is convex downward, and the surface It is preferable to apply a bending moment that causes tensile stress to Za.

  Further, in the present embodiment, as shown in FIG. 10, 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. That is, the first auxiliary member T1 is disposed at positions H2 to H5 including the point b ′, the point d ′, the point e ′, and the point g ′ that are intermediate points between the sides on the back surface Zb of the heat transfer plate 1. Then, pressing is performed by the press 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.

(5-2) Impact correction Next, impact correction will be explained. For impact correction, it approximates press correction.
Specific illustration is omitted. The hit correction means that the heat transfer plate is hit using a hitting tool such as a hammer to correct the warp generated on the heat transfer plate. 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 in 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. 9B). . Thereby, the curvature of the heat exchanger plate 1 can be corrected and made flat. Further, similarly to the press correction, the heat transfer plate 1 can be corrected in a well-balanced manner by hitting the positions H2 to H5 of the back surface Zb of the heat transfer plate 1 as necessary.

  The impact correction can be easily performed because it saves time and labor for preparing a press device or the like, compared with the press correction. 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.

(5-3) Roll correction Next, roll correction will be described. When the above-described joining process is completed, burrs generated by friction stirring are removed, and the back surface Zb of the heat transfer plate 1 is turned over so that it faces upward, and is parallel to the vertical direction including the center point j ′ of the back surface Zb. Thus, the long plate-shaped first auxiliary member T1 is arranged. 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. 11B, the heat transfer plate 1 is disposed between the rolls R1 and R2 so as to protrude upward, and rolls via the first auxiliary member T1 to the third auxiliary member T3. It is held between R1 and R2.

  The first auxiliary member T <b> 1 to the third auxiliary member T <b> 3 are members for preventing the heat transfer plate 1 from being damaged as well as a contact material when performing roll correction. 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 moves the heat transfer plate 1 downward as shown in FIGS. 11B and 11C. 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.

  11A, when the roll R1 rotates in the direction of the arrow α and the roll R2 rotates in the direction of the arrow β, the rolls R1 and R2 are in the direction of the arrow γ with respect to the heat transfer plate 1 ( 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 changes 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.

  Alternatively, the rolls R1 and R2 may be rotated in the vertical direction of the heat transfer plate 1 to perform the correction process, and then 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.

(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 transfer plate 1 is inserted into an annealing furnace (not shown) to remove the internal stress remaining in the plasticizing region W1. 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. In addition, it does not specifically limit about the annealing method, For example, you may energize the pipe | tube 20 for heat media, for example by supplying with electricity a micro heater.

  According to the method for manufacturing a heat transfer plate according to the first embodiment described above, when performing the joining process, the cooling plate 60 is disposed on the back side of the base member 2 and the friction stir is performed while cooling, so that heat shrinkage occurs. It is possible to prevent warping and bending of the heat transfer plate. Further, by using the cooling plate 60, management of a heat medium such as water is facilitated, so that the joining operation can be performed relatively easily. Moreover, since the cooling plate 60 is formed slightly larger than the base member 2, the heat transfer plate 1 can be placed stably. Thereby, the friction stir welding which concerns on a joining process can be performed stably. Further, the heat transfer plate 1 can be uniformly cooled by embedding the heat medium pipe 62 in the entire cooling plate 60 in a balanced manner.

  Further, even if the heat transfer plate 1 is bent due to heat shrinkage due to the joining process, the above-described correction process is performed to apply a bending moment that generates a tensile stress on the surface Za side of the heat transfer plate 1. Thereby, since the curvature which becomes convex on the back surface Zb side can be corrected, the flatness of the heat exchanger plate 1 can be improved. Further, by using the first auxiliary member T1 to the third auxiliary member T3 having a hardness lower than that of the heat transfer plate 1, the correction work can be performed without damaging the heat transfer plate 1.

[Second Embodiment]
In the heat transfer plate manufacturing method according to the second embodiment, as shown in FIG. 12, in the heat transfer plate 21, the plastic fluidized material is introduced into the gap portion 22 formed around the heat medium pipe 20. This is different from the first embodiment. That is, as shown in FIG. 1B, in the first embodiment, even if friction stirring is performed in the joining step, a gap is formed around the heat medium pipe 20. Therefore, as shown in the second embodiment, the gap 22 may be filled by flowing a plastic fluid into the gap 22 formed around the heat medium pipe 20. Note that description of parts common to the first embodiment is omitted.

  That is, the lid groove 3 and the lid plate 10 related to the heat transfer plate 21 are formed narrower than the first embodiment. In the joining step, frictional stirring is performed so that the joining rotary tool F is brought close to the heat medium pipe 20 in a state where the cooling plate 60 is disposed on the back side of the base member 2 to plastically fluidize the metal member. The plastic fluid material is caused to flow into the gap portion 22. Thereby, since the space | gap part 22 formed in the circumference | surroundings of the pipe | tube 20 for heat media is filled with a plastic fluid material (metal member), the heat exchange efficiency of the heat exchanger plate 21 can be improved.

  Moreover, the warp generated in the heat transfer plate 21 can be corrected by performing the press correction, the hitting correction, or the roll correction as described above on the heat transfer plate 21 thus 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 22 according to the magnitude | size of the rotation tool F for joining, the pushing amount, and the shape of the cover groove | channel 3 and the cover board 10. FIG.

[Third embodiment]
As shown in FIG. 13, the manufacturing method of the heat transfer plate according to the third embodiment is such that the cover plate 33 has a U shape in plan view and the flow path 39 of the cooling plate 37 also has a U shape in plan view. This is different from the first embodiment.

  (A) of FIG. 13 is the perspective view which showed the heat exchanger plate and cooling plate which concern on 3rd embodiment, (b) is the II-II sectional view taken on the line of (a). As shown in FIGS. 13A and 13B, the heat transfer plate 31 includes a base member 32 and a lid plate 33 inserted into the lid groove 34 of the base member 32.

  The base member 32 has a flat plate shape, and is provided with a lid groove 34 having a rectangular cross-sectional view so as to have a U-shape in plan view. Further, a concave groove 35 having a rectangular cross-sectional view is formed at the center of the lid groove 34 so as to exhibit a U shape in plan view along the lid groove 34. The cover plate 33 has a cross-sectional shape equivalent to the cross-sectional shape of the cover groove 34 and has a U-shape in plan view. Accordingly, when the lid plate 33 is inserted into the lid groove 34, a hollow portion 36 having a rectangular shape in cross section is formed by the concave groove 35 and the lower surface of the lid plate 33. In this embodiment, the base member 32 and the cover plate 33 are made of copper, for example.

  As shown in FIG. 13A, the cooling plate 37 includes a flat plate 38 and a channel 39 formed in the flat plate 38. The flow path 39 is circular in cross section and has a U shape in plan view. The planar shape of the concave groove 35 and the planar shape of the flow path 39 are formed substantially the same. That is, the flow path 39 is formed along the abutting portions J1 and J2 for performing frictional stirring. The flat plate 38 is made of an aluminum alloy and is formed to be slightly larger than the heat transfer plate 31.

  Next, the manufacturing method of a heat exchanger plate is demonstrated to 3rd embodiment. The manufacturing method of the heat exchanger plate according to the third embodiment includes (1) groove forming step, (2) lid groove closing step, (3) joining step, (4) straightening step, and (5) annealing step.

(1) Groove Forming Step In the groove forming step, as shown in FIG. 13B, the lid groove 34 and the concave groove 35 are formed on the surface of the base member 32 with a predetermined width and depth.

(2) Lid groove closing step In the lid groove closing step, the lid plate 33 is disposed in the lid groove 34 to close the lid groove 34. Thereby, a hollow portion 36 is formed surrounded by the concave groove 35 and the lower surface of the lid plate 33. Here, in the abutting portion between the lid groove 34 and the lid plate 33, a portion abutted between the lid groove 34 and the inner edge of the lid plate 33 is referred to as an abutting portion J <b> 1. This portion is referred to as a butt portion J2.

(3) Joining Step In the joining step, as shown in FIG. 14, friction stir welding is performed using the joining rotary tool F along the abutting portions J1 and J2 with the cooling plate 37 disposed on the back side of the base member 32. I do. That is, the cooling plate 37 is disposed so that the flow path 39 of the cooling plate 37 is positioned below the concave groove 35, and friction stirring is performed while flowing the heat medium (water) through the flow path 39. By the joining process, the plasticized region W1 is formed along the abutting portions J1 and J2.

  In addition, since (4) correction process and (5) annealing process are substantially equivalent to 1st embodiment, detailed description is abbreviate | omitted.

  According to the manufacturing method of the heat transfer plate 31 according to the third embodiment described above, the planar shape of the flow path 39 formed in the cooling plate 37 is formed to be substantially the same as the planar shape of the concave groove 35. . That is, since the flow path 39 of the cooling plate 37 is formed along the friction stir welding route, the cooling efficiency in the joining process can be further increased.

  In the present embodiment, the planar shape of the concave groove 35 and the planar shape of the flow path 39 are formed so as to be substantially the same. However, the present invention is not limited to this, and both shapes are substantially in plan view. You may form so that it may become a similar shape. Thereby, since a heat medium (water) can be flowed along the joining route of friction stir welding, cooling efficiency can be improved. Alternatively, a heat medium pipe may be inserted into the flow path 39 so that the heat medium flows through the heat medium pipe. Further, the joining process may be performed while flowing the heat medium through the flow path 39 and flowing the heat medium (water) through the hollow portion 36 of the heat transfer plate 31. Thereby, the cooling efficiency of the heat exchanger plate 31 can be further improved.

[Fourth embodiment]
Next, a fourth embodiment of the present invention will be described. In the first embodiment described above, by conducting frictional stirring along both side surfaces of the cover plate 10, heat transfer is performed so that two plasticized regions are formed as in the plasticized regions W1 and W1. Although the 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 so that only one line of plasticized region is formed.

  As shown in FIG. 15, the heat transfer plate manufacturing method according to the fourth embodiment is inserted into a base member 2 having a square plate thickness in plan view and a groove recessed in the base member 2 in the heat transfer plate 41. The heat medium pipe 20 and the cover plate 42 inserted in the groove formed in the base member 2 are mainly provided. The upper surface of the cover plate 42 is joined by a single friction stir.

As shown in FIGS. 16 and 17, 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 facing the base member 2. The concave groove 43 is a portion into which the heat medium pipe 20 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. 17, 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 20 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 20 has a meandering shape in plan view, and has a shape substantially equivalent to the planar shape of the groove 43.

  As shown in FIGS. 16 and 17, 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 concave groove 43. The lid plate 42 includes side surfaces 42a and 42b, an upper surface 42c, and a lower surface 42d. The sum of the height of the cover plate 42 and the outer diameter of the heat medium pipe 20 is formed substantially equal to the depth C ′ of the concave groove 43. Further, the width of the lid plate 42 is formed substantially equal to the width A ′ of the concave groove 43. Therefore, when the heat medium tube 20 and the lid plate 42 are inserted into the concave groove 43, the upper surface 42c of the lid plate 42 and the surface Za of the base member 2 are flush with each other, and the side surfaces 42a and 42b of the lid plate 42 are The side walls 43a and 43b of the concave groove 43 are in surface contact with each other 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) An annealing process is included.

(1) Groove Forming Step In the groove forming step, as shown in FIGS. 16 and 17, 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. 16 and 17, the heat medium tube 20 is inserted into the concave groove 43 formed in the groove formation step.

(3) Lid Plate Inserting Step In the lid plate inserting step, as shown in FIGS. 16 and 17, 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 cover plate 42, a portion where the one side wall 43 a of the concave groove 43 and the one side surface 42 a of the lid plate 42 are abutted is referred to as “abutting portion J <b> 3”. A portion that is abutted by the other side wall 43b of 43 and the other side surface 42b of the cover plate 42 is referred to as a “butting portion J4”.

(4) Joining Step In the joining step, as shown in FIG. 18, with the cooling plate 60 disposed on the back side of the base member 2, the joining rotary tool F is used along the lid plate 42 (concave groove 43). Friction stirring is performed. In the present embodiment, the joining process includes a tab material arranging process for arranging the tab material, and a joining process for performing frictional stirring. The cooling plate 60 is the same as that in the first embodiment.

  In the tab material arranging step, as shown in FIG. 18A, a pair of tab materials 48 and 49 are arranged on one side surface Zc and the other side surface Zd of the base member 2, respectively. The tab members 48 and 49 and the base member 2 are temporarily joined by welding.

In the joining step, as shown in FIGS. 18A and 18B, the heat medium (water) flows through the heat medium pipe 62 of the cooling plate 60 along the cover plate 42 (concave groove 43). And friction stir. That is, when the joining rotary tool F is pushed into the start position _SM4 set on the tab member 48 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 49.

As shown in (b) of FIG. 18, 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 joining rotary tool F pushes the cover plate 42, so that the heat medium pipe 20 is also pressed, and the concave groove 43 and the heat medium pipe 20 can be brought into close contact with each other. Thereby, since the space | gap part 22 formed in the circumference | surroundings of the pipe | tube 20 for heat media can be reduced, the heat exchange efficiency of the heat exchanger plate 41 can be improved. When the joining process is completed, the tab material is cut out from the base member 2.

  FIG. 19 is a perspective view showing the heat transfer plate 41 after the main joining process of the present embodiment. In the present embodiment, by arranging the cooling plate 60 on the back side of the base member 2, it is possible to reduce warpage and bending of the heat transfer plate due to thermal expansion and contraction, but it is difficult to completely eliminate the bending. is there. That is, since the plasticized region W3 formed by the joining process contracts 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 process The straightening process is a process performed in order to eliminate the warp generated in the joining process described above. The correction process may be performed by any one of the press correction, the hitting correction, and the roll correction shown in the first embodiment, and thus description thereof is omitted.

(6) Annealing Step In the annealing step, the internal stress of the heat transfer plate 41 is removed by annealing the heat transfer plate 41. In the present embodiment, the heat transfer plate 41 is inserted into an annealing furnace for annealing. Thereby, the internal stress of the heat-transfer plate 41 can be removed, and the deformation | transformation at the time of use of the heat-transfer plate 41 can be prevented.

  According to the heat transfer plate 41 according to the fourth embodiment described above, the cooling plate 60 is disposed on the back side of the base member 2 and the friction stir is performed while cooling when performing the joining process. Warpage and bending of the hot plate can be prevented. Moreover, since the management of the heat medium such as water is facilitated by using the cooling plate, the joining operation can be performed relatively easily.

  Moreover, the flatness of the heat-transfer plate 41 can be improved by performing a correction process. Moreover, in this embodiment, since the joining groove | channel can be performed only by one line of friction stirring by forming the concave groove 43 narrowly, an operation | work effort can be saved.

  In the present embodiment, the joining step may be performed while flowing the heat medium (water) through the heat medium pipe 20 of the heat transfer plate 41. Thereby, cooling efficiency can be improved. Further, the planar shape of the heat medium pipe 62 (flow path 63) of the cooling plate 60 may be formed in a meandering manner along the route of friction stir welding. Thereby, the cooling efficiency of the heat exchanger plate 41 can be improved more.

[Fifth embodiment]
The fifth embodiment is a modification of the fourth embodiment. As shown in FIG. 20, the method for manufacturing a heat transfer plate according to the fifth embodiment is different from the fourth embodiment in that it does not have a heat medium pipe. That is, in the fourth embodiment, the heat medium may be caused to flow directly into the concave groove 43 without using the heat medium pipe.

Since the lower portion of the concave groove 43 is cut out on an arc, when the lid plate 42 is inserted into the concave groove 43, the lid plate 42 is engaged with the concave groove 43 with a gap 44. And like 4th embodiment, the cooling plate 60 may be arrange | positioned on the back side of the base member 2, a joining process may be performed, and the base member 2 and the upper part of the cover plate 42 may be integrated by friction stirring. A plasticized region W <b> 4 is formed in the upper part of the lid plate 42.
The flatness of the heat transfer plate 51 can be improved by performing the above-described joining step and correction step on the heat transfer plate 51 formed in this way.

  Although the embodiments of the present invention have been described above, modifications can be made as appropriate without departing from the spirit of the present invention. For example, in the present embodiment, the heat medium pipes are arranged in a substantially horseshoe shape in plan view, a U shape in plan view, or a meandering shape in plan view, but the present invention is not limited to this and may take other forms. .

  Next, examples of the present invention will be described. In Examples, when performing the joining process on two test bodies having the same configuration (backing plate shown in the third embodiment), one performs the joining process by placing the test body on the steel plate, On the other hand, a test body was placed on the cooling plate to perform a joining process, and the warpage (deflection) of both was measured. In addition, the test which performs a joining process on a steel plate is set to Test 1, and the test which performs a joining process on a cooling plate is set to Test 2.

  As shown in FIG. 21, the test body 201 includes a base member 202 and a lid plate 203 that is inserted into a lid groove 204 that is recessed in the base member 202. The base member 202 and the cover plate 203 use oxygen-free copper (C1020). The base member 202 has a length of 3000 mm, a width of 200 mm, and a height of 20 mm. The lid plate 203 has a width of 30 mm and a thickness of 5 mm.

  As shown in FIG. 21B, a concave groove 205 having a rectangular cross-sectional view is formed in the center of the bottom surface of the cover groove 204 provided in the base member 202. A hollow portion is formed by the recessed groove 205 and the lower surface of the lid plate 203. The lid groove 204 has a width of 30 mm and a depth of 5 mm. The groove has a width of 20 mm and a depth of 9 mm. In the joining step, friction stir welding is performed by moving the joining rotary tool F along the pair of abutting portions J1 and J2. By the joining process, plasticized regions W and W are formed in the abutting portions J1 and J2.

As shown in FIG. 21 (c), the joining rotary tool F is made of special steel and includes a shoulder portion F1 and a stirring pin F2 suspended from the lower end surface F11 of the shoulder portion F1. Outer diameter _{X 1} of the shoulder portion F1 is 20 mm, the length _{L A} of the stirring pin F2 4 mm, the diameter _{X 2} on the base end side of the stirring pin F2 is 8 mm, the diameter _{X 3} of the tip side is formed at 6 mm. In the joining step, the joining rotary tool F is moved at a rotational speed of 1000 rpm and a traveling speed of 300 mm / min.

  In addition, as shown in FIG. 24, the cooling plate 37 used in Test 2 has a shape substantially the same as the cooling plate according to the third embodiment described above. The cooling plate 37 is made of an aluminum alloy (A5052). The cooling plate 37 is formed such that the planar shape of the hollow portion formed in the test body 201 and the planar shape of the flow path 39 of the cooling plate 37 are substantially equivalent. The cooling plate 37 has a length of 3020 mm, a width of 220 mm, and a height of 55 mm. The flow path 39 formed inside the cooling plate 37 has a circular shape in cross section and a diameter of 10 mm. The center of the flow path 39 is formed so as to be located 15 mm from the lower surface of the cooling plate 37. In the embodiment, water flows into the flow path 39.

<Test 1>
In Test 1, the test body 201 is placed on the steel plate U as shown in FIG. 22, and friction stir welding is performed over the entire abutting portions J1 and J2 (see FIG. 21B). It was. And as shown in FIG. 23, height U1 from the steel plate U to the back surface of the base member 202 was 15 mm.

<Test 2>
In Test 2, the test body 201 is placed on the cooling plate 37 as shown in FIG. 24, and friction stir welding is performed over the entire abutting portions J1 and J2 (see FIG. 21B). went. And as shown in FIG. 25, height U2 from a horizontal surface to the back surface of the base member 202 was 2 mm.

  As described above, when the test 1 and the test 2 are compared, it is found that the warpage of the joined test body is much smaller when the test body 201 is arranged on the cooling plate 37 and the joining process is performed.

DESCRIPTION OF SYMBOLS 1 Heat-transfer plate 2 Base member 3 Lid groove 4 Recessed groove 10 Lid plate 20 Heat medium pipe 22 Cavity part 60 Cooling plate 62 Heat medium pipe (of cooling plate) 63 Flow path F Joining rotary tool J Butt part W Plasticity Area Za surface Zb back surface

Claims (7)

A heat medium tube insertion step of inserting a heat medium tube into a concave groove formed in the bottom surface of the lid groove opened 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 of performing frictional stirring 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,
In the joining step, the plastic fluidizing material fluidized by frictional heat in the gap formed around the heat medium pipe while performing frictional stirring with a cooling plate provided on the back side of the base member The manufacturing method of the heat exchanger plate characterized by making it flow in. 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,
In the joining step, friction stirring is performed in a state where a cooling plate is provided on the back surface side of the base member, and the lid plate presses the upper part of the heat medium pipe by the pressing force of the joining rotary tool, A method of manufacturing a heat transfer plate, characterized by frictionally stirring at least an upper portion of a cover plate and the base member. 2. In the joining step, friction stir is performed while cooling the base member and the lid plate by flowing a heat medium through the heat medium pipe inserted into the concave groove of the base member. Or the manufacturing method of the heat exchanger plate of Claim 2. 4. The friction agitation is performed while cooling the cooling plate by flowing a heat medium through a flow path formed in the cooling plate in the joining step. 5. The manufacturing method of the heat exchanger plate as described in 2. The planar shape of the flow path formed in the cooling plate is substantially the same as or substantially similar to the planar shape of the concave groove, and the heat transfer plate according to claim 4, Method. 4. In the joining step, friction stir is performed while cooling the cooling plate by flowing a heating medium through a heat medium pipe embedded in the cooling plate. The manufacturing method of the heat exchanger plate as described in one term. 7. The heat transfer plate according to claim 6, wherein a planar shape of the heat medium pipe embedded in the cooling plate is formed to be substantially equivalent to or substantially similar to the planar shape of the concave groove. Manufacturing method.

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