JP5125760B2 - Heat transfer plate manufacturing method and heat transfer plate - Google Patents

Description

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

  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.

FIG. 10 is a view showing a conventional heat transfer plate, in which (a) is a perspective view and (b) is a side view. A conventional heat transfer plate 100 includes a lid groove 106 having a rectangular cross-section opening on the surface, a base member 102 having a concave groove 108 opening on the bottom surface of the lid groove 106, and a heat medium tube inserted into the concave groove 108. 116 and a lid plate 110 fitted in the lid groove 106, and friction stir welding along the abutting surfaces of both side walls 105, 105 in the lid groove 106 and both side surfaces 113, 114 of the lid plate 110. Is applied to form plasticized regions W ₁ and W ₂ .

JP 2004-314115 A

However, the conventional heat transfer plate 100 performs at least two lines of friction agitation on the abutting surfaces of the side walls 105, 105 in the lid groove 106 and the side surfaces 113, 114 of the lid plate 110. There was a problem of increasing.
From such a viewpoint, an object of the present invention is to provide a heat transfer plate manufacturing method and a heat transfer plate with fewer work steps.

  A method of manufacturing a heat transfer plate according to the present invention that solves such a problem includes a heat medium tube in which a heat medium tube is inserted into a concave groove formed in a bottom surface of a lid groove that opens to the surface side of a base member. An insertion step, a lid member insertion step in which a lid member is inserted into the lid groove, and the lid member is brought into contact with a bottom surface of the lid groove, and a side wall of the lid groove and a side surface of the lid member are opposed to each other A rotating step of moving the rotating tool relative to each other to perform frictional stirring, and the outer diameter of the shoulder portion of the rotating tool is equal to or greater than the width of the opening of the lid groove, In a state where the heat medium pipe is not plastically deformed, the rotary tool is moved once, and the abutting portion between one side wall of the lid groove and one side surface of the lid member, and the other side of the lid groove Simultaneously performing frictional stirring on the abutting portion of the side wall of the lid member and the other side surface of the lid member And butterflies.

  According to such a manufacturing method, by setting the outer diameter of the shoulder portion of the rotating tool to be equal to or larger than the width of the opening of the lid groove, friction stirring is performed only by moving the rotating tool once with respect to the pair of abutting portions. Can do. Thereby, the work process of a joining process can be decreased.

  Moreover, it is preferable that the distance from the bottom part of the said ditch | groove to the lower part of the said cover member is larger than the vertical direction height of the said pipe | tube for heat media.

  According to this manufacturing method, since the lid member and the heat medium pipe are separated from each other, plastic deformation of the heat medium pipe can be reliably prevented during friction stirring.

  Moreover, it is preferable that the lower part of the said cover member is formed along the shape of the said heat | fever medium pipe | tube, and is in contact with the said heat | fever medium pipe | tube. According to this joining method, since the cavities formed around the heat medium pipe can be reduced, the heat conduction efficiency of the heat transfer plate can be increased.

  Moreover, it is preferable to include the filling process which fills the space enclosed by the said ditch | groove and the circumference | surroundings of the said heat | fever medium pipe | tube before the said cover member insertion process. Moreover, it is preferable that the said heat conductive substance is a metal powder, a metal powder paste, or a metal sheet. The heat conductive material is preferably a low melting point brazing material.

  According to such a joining method, generation of cavities formed around the heat medium pipe can be suppressed, and heat can be efficiently transmitted through the heat conductive substance.

  Moreover, it is preferable that the maximum diameter of the stirring pin of the rotating tool is not less than the width of the lid groove. Moreover, it is preferable that the minimum diameter of the stirring pin of the rotating tool is not less than the width of the lid groove.

  According to such a joining method, by setting the size of the stirring pin to be larger than the width of the opening of the lid groove, it is possible to reliably frictionally stir only by moving the rotary tool once with respect to the pair of abutting portions. It can be performed.

  In the joining step, there is no limitation on the range (depth) for plastic fluidization, but in order to join the lid member and the base member more firmly, the deepest part of the plasticizing region is the upper part of the lid member. It is preferable to reach a depth position of 1/3. More preferably, it is preferable that the deepest portion of the plasticized region reaches the depth position of the upper half of the lid member. Even more preferably, it is preferable that the deepest part of the plasticized region reaches the depth position of the upper 2/3 of the lid member.

  Further, after the joining step, an upper lid member inserting step of bringing the upper lid member into contact with the bottom surface of the upper lid groove formed wider than the width of the lid groove on the surface side of the base member; and a side wall of the upper lid groove; It is preferable to include an upper lid member joining step in which frictional stirring is performed by relatively moving the rotary tool along the upper abutting portion with the side surface of the upper lid member.

  According to this joining method, the heat medium pipe can be formed at a deeper position by further disposing the upper cover member on the cover member.

  Further, the present invention provides a base member having a concave groove formed on the bottom surface of the lid groove that opens to the front surface side, a heat medium pipe inserted into the concave groove, and a lid member inserted into the lid groove. A heat transfer plate that is friction stir welded using a rotary tool and the heat medium tube is not plastically deformed, and one side wall of the lid groove and one side surface of the lid member And the width of the single plasticizing region formed with respect to the abutting portion of the abutting portion and the abutting portion of the other side wall of the lid groove and the other side surface of the lid member is greater than the width of the lid groove. It is characterized by being.

  According to such a configuration, by setting the outer diameter of the shoulder portion of the rotating tool to be equal to or larger than the width of the opening portion of the lid groove, it is possible to perform friction stirring only by moving the rotating tool once with respect to the pair of abutting portions. it can. Thereby, a heat exchanger plate can be manufactured with few work processes.

  Further, the base member having the upper lid groove formed wider than the lid groove on the surface side of the base member, and the upper lid member inserted into the upper lid groove, the sidewall of the upper lid groove It is preferable that friction stirring is performed along the upper abutting portion between the upper lid member and the side surface of the upper lid member.

  According to such a configuration, the heat medium pipe can be formed at a deeper position by further disposing the upper cover member on the cover member.

  According to the heat transfer plate manufacturing method of the present invention, the heat transfer plate can be manufactured with a small number of work steps.

[First embodiment]
The best embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a heat transfer plate according to the first embodiment. 2A is a side view of the rotary tool according to the first embodiment and an exploded side view of the heat transfer plate, and FIG. 2B is a schematic arrangement view of the heat transfer plate according to the first embodiment. .

As shown in FIGS. 1 and 2, the heat transfer plate 1 according to the first embodiment includes a thick plate-shaped base member 2 having a front surface 3 and a back surface 4, and a lid groove 6 opened on the front surface 3 of the base member 2. integral with the lid member 10 disposed, comprising mainly a thermal medium pipe 16 which is inserted into the concave groove 8 open to the bottom face 6a of Futamizo 6, the plasticized region W ₁ formed by friction stir welding Is formed. Here, the “plasticization region” includes both a state heated by frictional heat of the rotary tool and actually plasticized, and a state where the rotary tool passes and returns to room temperature.

  As shown in FIG. 2, the base member 2 has a role of transmitting heat of the heat medium flowing through the heat medium pipe 16 to the outside, or a role of transferring external heat to the heat medium flowing through the heat medium pipe 16. To fulfill. A lid groove 6 is recessed in the surface 3 of the base member 2, and a recessed groove 8 narrower than the lid groove 6 is recessed in the center of the bottom surface 6 a of the lid groove 6. The lid groove 6 is a portion where the lid member 10 is disposed, and is formed continuously over the longitudinal direction of the base member 2. The lid groove 6 has a rectangular shape in a sectional view, and includes side walls 5 a and 5 b that rise vertically from the bottom surface 6 a of the lid groove 6.

The concave groove 8 is a portion into which the heat medium pipe 16 is inserted, and is formed continuously over the longitudinal direction of the base member 2. The concave groove 8 is a U-shaped groove with an upper opening, and a bottom 7 having a semicircular shape in cross section is formed at the lower end. The width A of the opening portion of the groove 8 is formed substantially equal to the outer diameter B of the heat medium pipe 16, and the depth C of the groove 8 is larger than the outer diameter B of the heat medium pipe 16. Is formed. Further, the width E of the lid groove 6 is formed larger than the width A of the concave groove 8, and the depth J of the lid groove 6 is formed substantially equal to the thickness F of the lid member 10 described later. . The base member 2 is made of, for example, an aluminum alloy (JIS: A6061).

  As shown in FIGS. 1 and 2, the lid member 10 is made of the same kind of aluminum alloy as the base member 2, and has a rectangular section substantially the same as the section of the lid groove 6 of the base member 2. It has a side surface 13a and a side surface 13b. Further, the thickness F of the lid member 10 is formed substantially equal to the depth J of the lid groove 6, and the width G of the lid member 10 is formed substantially equal to the width E of the lid groove 6.

As shown in FIG. 2B, when the lid member 10 is inserted into the lid groove 6, the lower surface 12 (lower part) of the lid member 10 comes into contact with the bottom surface 6 a of the lid groove 6. The side surfaces 13a and 13b of the lid member 10 are in surface contact with the side walls 5a and 5b of the lid groove 6 or face each other with a fine gap. Here, the abutting faces of the one side wall 5a of the one side surface 13a and Futamizo 6 of the lid member 10 below the butting portion V _1. Further, the abutting faces of the other side wall 5b of the other side surface 13b and Futamizo 6 of the lid member 10 below the butting portion V _2. In addition, the abutting portion V ₁ and the abutting portion V ₂ are also simply referred to as a butting portion V.

  As shown in FIG. 2, the heat medium pipe 16 is a cylindrical pipe having a hollow portion 18 having a circular cross section. The outer diameter B of the heat medium pipe 16 is formed to be approximately equal to the width A of the groove 8, and as shown in FIG. 1, the lower half of the heat medium pipe 16 and the bottom 7 of the groove 8 Makes surface contact.

  The heat medium pipe 16 is a member that circulates a heat medium such as a high-temperature liquid or a high-temperature gas in the hollow portion 18 to transmit heat to the base member 2 and the lid member 10, or the hollow portion 18 has cooling water, cooling, or the like. It is a member that transfers heat from the base member 2 and the lid member 10 by circulating a heat medium such as gas. Further, for example, a heater may be passed through the hollow portion 18 of the heat medium pipe 16 to transmit heat generated from the heater to the base member 2 and the lid member 10.

  In the first embodiment, the heat medium pipe 16 is circular in cross section, but may be square in cross section. Moreover, although the copper pipe was used for the heat medium pipe 16 in the first embodiment, a pipe made of another material may be used.

  In the first embodiment, the bottom 7 of the groove 8 and the lower half of the heat medium pipe 16 are brought into surface contact, and the upper end of the heat medium pipe 16 and the lower surface 12 of the lid member 10 are separated from each other. However, the present invention is not limited to this. For example, the depth C and the outer diameter B of the concave groove 8 may be formed in a range of B ≦ C <1.2B. Further, the width A of the concave groove 8 and the outer diameter B of the heat medium pipe 16 may be formed in a range of B ≦ A <1.1B.

  Here, as shown in FIG. 2B, the lower surface 12 of the lid member 10 contacts the bottom surface 6 a of the lid groove 6, and the depth C of the concave groove 8 is the outer diameter of the heat medium pipe 16. It is formed larger than B. Accordingly, when the lid member 10 is inserted into the cover groove 6 after the heat medium pipe 16 is inserted into the concave groove 8 of the base member 2, the concave groove 8, the outer periphery of the heat medium pipe 16, the lower surface 12 of the lid member 10, A void P surrounded by is formed. The void portion P is filled with a heat conductive material to be described later.

As shown in FIG. 1, when the friction stir welding is performed on the abutting portions V ₁ and V ₂ , the plasticizing region W ₁ is integrated by a part of the base member 2 and the lid member 10 being plastically flowed. It is an area. In the present embodiment, the maximum width Wa of the plasticized region W ₁ (the width at the surface 3) is formed to be larger than the width of Futamizo 6 E (the (a) see FIG. 2).

In the present embodiment, the deepest part of the plasticized region W ₁ is, has been set to reach the substantially center of the lid member 10, the plasticized region W ₁ magnitude, the rotating tool for size and below the lid member 10 may be appropriately set based on the size, for example, the deepest portion of the plasticized region W ₁ may be set so as to reach the position above about 2 / 3-1 / 3 of the lid member 10.

  Next, the manufacturing method of the heat exchanger plate 1 is demonstrated using FIG. FIG. 3 is a side view showing a method for manufacturing a heat transfer plate according to the first embodiment, in which (a) shows a heat medium tube insertion step in which a heat medium tube is inserted, and (b) shows The lid member inserting step is shown, (c) shows the joining step, and (d) shows the completed drawing.

  The heat transfer plate manufacturing method according to the first embodiment includes a preparation process for forming the base member 2, and a heat medium pipe insertion process for inserting the heat medium pipe 16 into the concave groove 8 formed in the base member 2. , A filling step for filling the groove 8 and the heat medium pipe 16 with the heat conductive material 25, a lid member insertion step for inserting the lid member 10 into the lid groove 6, and rotation for joining along the abutting portion V And a joining step of moving the tool 20 to perform friction stir welding.

First, a rotating tool used for friction stirring in the joining process will be described with reference to FIG. The joining rotary tool 20 used in the present embodiment is made of, for example, tool steel, and includes a cylindrical shoulder portion 22 and a stirring pin 26 that hangs down from the center portion of the lower surface 24 on a concentric axis. Stirring pin 26 exhibits a tapered shape that is narrower toward the distal end is formed with a length L _A. A plurality of small grooves (not shown) and screw grooves along the radial direction may be formed on the peripheral surface of the stirring pin 26 along the axial direction.

In this embodiment, the outer diameter X ₁ of the shoulder portion 22 is formed on the above dimensions the width of Futamizo 6 E. Accordingly, the joining rotation tool 20 along the cover member 10 (Futamizo 6) by moving as one, can be performed simultaneously friction stir against butting portion V _1, V _2.
In the present embodiment, the joining rotary tool 20 is set as described above. For example, the base end portion (maximum outer diameter X ₂ ) of the stirring pin 26 is set to be equal to or larger than the width E of the lid groove 6. Also good. Further, for example, the tip end portion (minimum outer diameter X ₃ ) of the stirring pin 26 may be set to be equal to or larger than the width E of the lid groove 6. Thus, by setting the size of the joining rotary tool 20 to be larger than the width E, the friction stir can be more reliably performed by moving the abutting portions V ₁ and V ₂ once.

(Preparation process)
First, as shown in FIG. 2A, the lid groove 6 is formed in the thick plate member by, for example, flat end milling. Then, a concave groove 8 having a semicircular cross section is formed on the bottom surface 6a of the lid groove 6 by, for example, ball end milling. Thereby, the base member 2 provided with the cover groove 6 and the concave groove 8 opened in the bottom face 6a of the cover groove 6 is formed. The concave groove 8 includes a bottom portion 7 having a semicircular cross section in the lower half portion, and is opened upward with a certain width from the upper end of the bottom portion 7.
Although the base member 2 is formed by cutting in this embodiment, an extruded shape of an aluminum alloy may be used.

(Heat medium tube insertion process)
Next, as shown in FIG. 3A, the heat medium pipe 16 is inserted into the groove 8. The lower half of the heat medium pipe 16 is in surface contact with the bottom 7 forming the lower half of the groove 8.

(Filling process)
Next, as shown in FIG. 3A, a portion surrounded by the groove 8 and the heat medium pipe 16 is filled with a heat conductive material 25. In the filling step, filling is performed until the upper surface of the heat conductive material 25 and the bottom surface 6a of the lid groove 6 are flush with each other. The heat conductive material 25 is filled in the gap P (see FIG. 2B), thereby filling the gap P to increase the heat conduction efficiency of the heat transfer plate 1, and also improve water tightness and air tightness. Play a role to enhance. In the present embodiment, a known low melting point brazing material of metal powder is used as the heat conductive material 25. In addition, the heat conductive substance 25 should just be a material which fills the space | gap part P of the heat exchanger plate 1, and improves heat transfer efficiency, and may be a metal powder paste, a metal sheet, etc.

(Cover member insertion process)
Next, as shown in FIG. 3B, the lid member 10 is inserted into the lid groove 6 of the base member 2. At this time, the lower surface 12 of the lid member 10 contacts the bottom surface 6 a of the lid groove 6, and the upper surface 11 of the lid member 10 is flush with the surface 3 of the base member 2. Further, the abutting portions V ₁ and V ₂ are formed by the side walls 5 a and 5 b of the lid groove 6 and the side surfaces 13 a and 13 b of the lid member 10.

(Joining process)
Next, as shown in (c) of FIG. 3, friction agitation is performed on the abutting portion V (the abutting portions V ₁ and V ₂ ) using the joining rotary tool 20. That is, after aligning the center of the joining rotary tool 20 with the center of the lid groove 6 in the width direction, the lower surface 24 of the shoulder portion 22 of the joining rotary tool 20 is placed on the surface 3 of the base member 2 at a predetermined depth. Push in and move relative to the butt portion V.

In the present embodiment, the rotational speed of the joining rotary tool 20 is, for example, 50 to 1500 rpm, the feed rate is 0.05 to 2 m / min, and the pushing force applied in the axial direction of the joining rotary tool 20 is 1 kN to 20 kN.
As shown in FIG. 3 (d), plasticized region W ₁ is formed on the surface 3 of the base member 2 by the joining process. The deepest part of the plasticized region W ₁ is, in this embodiment, by setting the pushing amount of the length and joining rotation tool 20 of the stirring pin 26 as substantially reach the center of the lid member 10. Further, the depth Wb of the plasticized region W _{1 at} the abutting portions V ₁ and V ₂ is set to be about ¼ of the thickness of the lid member 10. By setting the depth Wb of the plasticized region W _{1 at} the abutting portions V ₁ and V ₂ to be large, the joining force between the base member 2 and the lid member 10 can be increased.
The size of the plasticized region W ₁ (depth), shape and number of revolutions or the pushing amount of the joining rotation tool 20 is merely illustrative and not intended to be limiting, the base member 2 and the lid member 10 These may be set as appropriate in consideration of the above materials.

According to the method of manufacturing a heat transfer plate according to the present embodiment as described above, the outer diameter X ₁ of the shoulder portion 22 of the joining rotation tool 20, since the set larger than the width E of Futamizo 6, The abutting portions V ₁ and V ₂ can be simultaneously frictionally stirred by moving the joining rotary tool 20 once along the center in the width direction of the lid member 10, and the base member 2 and the lid member 10 are frictionally agitated. It can be integrated by stirring.

  Further, since the lower surface 12 of the lid member 10 is in contact with the bottom surface 6 a of the lid groove 6 and the heat medium pipe 16 and the lid member 10 are separated from each other, the bonding rotary tool 20 is pushed in from the upper surface 11 of the lid member 10. However, the heat medium pipe 16 is not crushed. Thereby, the flow path of the heat-medium pipe | tube 16 can be ensured reliably. Moreover, the heat medium pipe | tube 16 can be arrange | positioned in the deep position of the base member 2 by enlarging the height of the cover groove | channel 6 and the cover member 10 in the up-down direction.

  Further, by filling the gap P (see FIG. 2B) formed around the heat medium pipe 16 with the heat conductive material 25, heat from the heat medium can be efficiently transmitted. . Moreover, the airtightness of the heat exchanger plate 1 and watertightness can be improved by filling the space | gap part P which may be formed in the inside of the heat exchanger plate 1. FIG.

  In this embodiment, the joining step is performed in a state where the heat medium pipe 16 and the lid member 10 are separated from each other, but the present invention is not limited to this, and the heat medium pipe 16 and the lid member 10 are connected to each other. You may perform a joining process in the state made to contact. In this case, the size and pushing amount of the joining rotary tool 20 may be set so that the heat medium pipe 16 is not plastically deformed.

[Second Embodiment]
Next, the manufacturing method of the heat exchanger plate which concerns on 2nd embodiment of this invention is demonstrated.
As shown in FIG. 4, the method for manufacturing a heat transfer plate according to the second embodiment is characterized in that the lid member 30 has a substantially T shape in cross section. In addition, description is abbreviate | omitted about the part which overlaps with 1st embodiment.

As shown in FIG. 4A, a lid groove 36 is formed in the surface 33 of the base member 32, and a recess having a narrower width than the lid groove 36 is formed at the center of the bottom surface 36 a of the lid groove 36. A groove 38 is recessed. The lid groove 36 is a portion where the lid member 30 is disposed, and is formed continuously over the longitudinal direction of the base member 32. The lid groove 36 has a rectangular shape in sectional view, and includes side walls 35 a and 35 b that rise vertically from the bottom surface 36 a of the lid groove 36. The width e of the lid groove 36 is formed substantially equal to the width g ₁ of the lid member 30 described later, and the depth j of the lid groove 36 is formed substantially equal to the depth f ₁ of the lid member 30. Yes.

  The concave groove 38 is a portion into which the heat medium pipe 16 and the lid member 30 are inserted, and is formed continuously along the longitudinal direction of the base member 32. The concave groove 38 is a U-shaped groove with an upper opening, and a bottom portion 37 having a semicircular shape in cross section is formed at the lower end. The width A of the concave groove 38 is formed substantially equal to the outer diameter B of the heat medium pipe 16.

As shown in FIG. 4A, the lid member 30 is a member inserted into the lid groove 36 and the concave groove 38 of the base member 32, and has a wide portion 41 formed wide and a wide portion 41. And a narrow portion 42 formed to be narrower than that. The wide portion 41 has an upper surface 43, a lower surface 44, and side surfaces 43a and 43b. The width g ₁ of the wide portion 41 is formed substantially equal to the width e of the lid groove 36, and the thickness f ₁ is formed substantially equal to the depth j of the lid groove 36.
The narrow portion 42 extends downward from the center of the lower surface 44 of the wide portion 41. The width g ₂ of the narrow portion 42 is formed substantially equal to the width A of the concave groove 38.

As shown in FIG. 4B, when the lid member 30 is inserted into the lid groove 36, the lower surface 44 of the wide portion 41 of the lid member 30 contacts the bottom surface 36 a of the lid groove 36. The side surfaces 43a and 43b of the wide portion 41 are in surface contact with the side walls 35a and 35b of the lid groove 36 or face each other with a fine gap. Here, the butting face between the one side wall 35a of one side 43a and Futamizo 36 of the cover member 30 below the butting portion _{V 3.} Further, the abutment surfaces of the other side wall 35b of the other side surface 43b and Futamizo 36 of the cover member 30 below the butting portion _{V 4.} Further, the abutting portion V ₃ and the abutting portion V ₄ are also simply referred to as a butting portion V.

Further, when the lid member 30 is inserted into the lid groove 36, both side surfaces of the narrow portion 42 of the lid member 30 are in surface contact with both side surfaces of the concave groove 38 or face each other with a fine gap. The sum of the thickness f ₂ of the narrow portion 42 and the outer diameter B of the heat medium pipe 16 is formed to be smaller than the depth c of the concave groove 38. In other words, as shown in FIG. 2B, the distance from the bottom 37 of the concave groove 38 to the lower surface (lower part) 45 of the narrow portion 42 of the lid member 30 is greater than the outer diameter B of the heat medium pipe 16. Is also big. Therefore, as shown in FIG. 4B, when the lid member 30 is inserted into the lid groove 36, the upper end of the heat medium pipe 16 is separated from the lower surface 45 of the narrow portion 42 with a predetermined interval.

  Thus, when the lid member 30 is inserted into the cover groove 36 after the heat medium pipe 16 is inserted into the concave groove 38 of the base member 32, the concave groove 38, the outer periphery of the heat medium pipe 16, and the lower surface 45 of the lid member 30. The gap P1 formed in (1) is formed. The space P1 is filled with a heat conductive material.

  Next, the manufacturing method of the heat exchanger plate 49 which concerns on 2nd embodiment is demonstrated using FIG. (A) of FIG. 5 is the figure which showed the joining process which concerns on 2nd embodiment, (b) shows the completion figure which concerns on 2nd embodiment.

The heat transfer plate manufacturing method according to the second embodiment includes a preparation step for forming the base member 32, and a heat medium tube insertion step for inserting the heat medium tube 16 into the concave groove 38 formed in the base member 32. , A filling step of filling the heat conductive material 25 on the concave groove 38 and the heat medium pipe 16, a lid member inserting step of inserting the lid member 30 into the lid groove 36, and rotation for joining along the abutting portion V And a joining step of moving the tool 20 to perform friction stir welding.
In addition, since the preparatory process of the manufacturing method of the heat exchanger plate which concerns on 2nd embodiment, and the pipe | tube insertion process for heat medium are substantially equivalent to 1st embodiment, description is abbreviate | omitted.

(Filling process)
As shown in FIG. 5A, a portion surrounded by the groove 8 and the heat medium pipe 16 is filled with a heat conductive material 25. In the present embodiment, a portion surrounded by the heat medium pipe 16, the concave groove 38, and the lower surface 45 of the lid member 30 is filled with the heat conductive material 25 with a predetermined thickness.

(Cover member insertion process)
In the lid member insertion step, as shown in FIG. 4, the lid member 30 is inserted into the lid groove 36 of the base member 32. At this time, the lower surface 44 of the wide portion 41 of the lid member 30 contacts the bottom surface 36 a of the lid groove 36, and the upper surface 43 of the wide portion 41 is flush with the surface 3 of the base member 32. Further, the lower surface 45 of the narrow portion 42 abuts on the heat conductive material 25.

(Joining process)
In the joining step, as shown in FIGS. 5A and 5B, friction agitation is performed on the abutting portions V ₁ and V ₂ using the joining rotary tool 20. That is, after the center of the joining rotary tool 20 and the center of the lid groove 36 are aligned, the lower surface 24 of the shoulder portion 22 of the joining rotary tool 20 is pushed into the surface 3 of the base member 32 at a predetermined depth, and the abutting portion Relative movement along V.

Above according to the method of manufacturing a heat transfer plate according to the present embodiment described, the outer diameter X ₁ of the shoulder portion 22 of the joining rotation tool 20, since the set larger than the width e of Futamizo 36, lid The abutting portions V ₃ and V ₄ can be simultaneously frictionally stirred by moving the joining rotary tool 20 once along the center in the width direction of the member 30, and the base member 32 and the lid member 30 can be frictionally stirred. Can be integrated. That is, the maximum width of the plasticized region W <b> ₂ formed by the joining process is formed larger than the width e of the lid groove 36.

  Further, since the lower surface 44 of the wide portion 41 of the lid member 30 is in contact with the bottom surface 36 a of the lid groove 36 and the lower surface 45 of the narrow portion 42 and the heat medium pipe 16 are separated from each other, the upper surface of the lid member 30. Even if the bonding rotary tool 20 is pushed in from 43, the heat medium pipe 16 is not crushed. Thereby, the flow path of the heat-medium pipe | tube 16 can be ensured reliably. Moreover, the heat medium pipe | tube 16 can be arrange | positioned in a deep position by setting the length (depth) of the narrow part 42 and the ditch | groove 38 of the cover member 30 long.

[Third embodiment]
Next, the manufacturing method of the heat exchanger plate which concerns on 3rd embodiment of this invention is demonstrated.
The heat transfer plate manufacturing method according to the third embodiment is the first implementation in that the lower part of the lid member 50 is formed along the shape of the heat medium pipe 16 as shown in FIG. It differs from the form. In addition, description is abbreviate | omitted about the part which overlaps with 1st embodiment.

  The lid member 50 according to the third embodiment is a member that is inserted into a part of the lid groove 6 and the concave groove 8 of the base member 2 as shown in FIG. A wide portion 51 and a narrow portion 52 formed narrower than the wide portion 51. The wide portion 51 has an upper surface 53, a lower surface 55, and side surfaces 54a and 54b. The width G of the wide portion 51 is formed substantially equal to the width E of the lid groove 6, and the thickness F is formed substantially equal to the depth J of the lid groove 6. The narrow portion 52 extends downward from the center of the lower surface 55 of the wide portion 51. A bent portion 56 having the same curvature as the outer diameter B of the heat medium pipe 16 is formed in the lower portion of the narrow portion 52. The width G1 of the narrow portion 52 is formed substantially equal to the width A of the recessed groove 8.

  As shown in FIG. 6B, when the lid member 50 is inserted into the lid groove 6, the lower surface 55 of the wide portion 51 of the lid member 50 comes into contact with the bottom surface 6 a of the lid groove 6, and the narrow portion 52 is bent. The part 56 contacts the heat medium pipe 16. That is, as shown in FIG. 2B, when the lower surface 12 of the lid member 10 is flat, a gap portion P is formed, but the lower end of the lid member 10 is for the heat medium as in the third embodiment. By being formed following the outer diameter B of the tube 16, the periphery of the heat medium tube 16 can be sealed.

  In addition, since the manufacturing method of the heat exchanger plate which concerns on 3rd embodiment is the same as 1st embodiment except not including a filling process, detailed description is abbreviate | omitted.

  According to the method for manufacturing a heat transfer plate according to the third embodiment, the lower surface 55 of the wide portion 51 of the lid member 50 abuts against the bottom surface 6a of the lid groove 6 as shown in FIG. Even if the rotating tool 20 for welding is pushed in from 53 and frictional stirring is performed, the heat medium pipe 16 is not crushed. Moreover, since the lower part of the cover member 50 is formed along the shape of the outer periphery of the heat medium pipe 16, it is possible to prevent the generation of voids. Thereby, the heat conduction efficiency of the heat transfer plate 61 can be increased.

  In the present embodiment, the cross-sectional shape of the lower portion of the narrow portion 52 is formed in an arc following the shape of the outer periphery of the heat medium pipe 16, but the cross-sectional shape of the heat medium pipe is another shape. In that case, the shape of the narrow portion 52 may be formed following the shape.

[Fourth embodiment]
Next, a heat transfer plate according to the fourth embodiment will be described. FIG. 8 is an exploded side view showing a heat transfer plate according to the fourth embodiment. FIG. 9 is a side view showing a heat transfer plate according to the fourth embodiment.
A heat transfer plate 81 according to the fourth embodiment shown in FIG. 8 includes a structure substantially equivalent to that of the heat transfer plate 1 according to the first embodiment (see FIG. 1), and is further provided on the surface side of the lid member 10 with an upper lid member. It differs from 1st embodiment by the point which has arrange | positioned 70 and performed friction stir welding.
In addition, the structure equivalent to the above-described heat transfer plate 1 is also referred to as a lower lid portion M below. Moreover, about the member which overlaps with the heat exchanger plate 1 which concerns on 1st embodiment, an equivalent code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

As shown in FIGS. 8 and 9, the heat transfer plate 81 is disposed on the surface side of the base member 62, the heat medium pipe 16 inserted into the concave groove 8, the lid member 10, and the lid member 10. And an upper lid member 70, which are integrated by friction stir welding in the plasticized region W ₁ and the plasticized regions W ₄ and W ₅ .

  As shown in FIGS. 8 and 9, the base member 62 is made of, for example, an aluminum alloy, and has a top cover groove 64 formed in the longitudinal direction on the surface 63 of the base member 62 and a bottom surface 66 of the top cover groove 64. It has the cover groove | channel 6 formed continuously over the direction, and the ditch | groove 8 formed in the bottom face of the cover groove | channel 6 over the longitudinal direction. The upper lid groove 64 has a rectangular shape in cross section, and includes side walls 65 a and 65 b that rise vertically from the bottom surface 66. The width of the upper lid groove 64 is formed larger than the width of the lid groove 6.

As shown in FIG. 8, the heat medium pipe 16 is inserted into the groove 8 formed in the lower part of the base member 62, is closed by the lid member 10, and is formed in the plasticized region W ₁ by friction stir welding. It is joined. That is, the lower lid portion M formed inside the base member 62 is formed substantially equivalent to the heat transfer plate 1 according to the first embodiment.

Note that a step (groove) or a burr may be generated on the bottom surface 66 of the upper lid groove 64 due to the friction stir welding. Thus, for example, based on the surface of the plasticized region W _1, it is preferable to smooth surface by subjecting the scalped machining the bottom surface 66 of the upper lid groove 64. Thereby, the lower surface 72 of the upper lid member 70 and the bottom surface 66 of the upper lid groove 64 after chamfering can be arranged without a gap.

As shown in FIGS. 8 and 9, the upper lid member 70 is made of, for example, an aluminum alloy, has a rectangular cross section substantially the same as the cross section of the upper lid groove 64, and has side surfaces 73 a and 73 b formed vertically from the lower surface 72. Have The upper lid member 70 is inserted into the upper lid groove 64. That is, the side surfaces 73a and 73b of the upper lid member 70 are in surface contact with the side walls 65a and 65b of the upper lid groove 64 or are arranged with a fine gap. Here, the abutting faces of the one side 73a and one of the side walls 65a below the upper butt portions V _5. Further, the abutting faces of the other side surface 73b and the other side wall 65b below the upper butt portion V _6. The upper abutting portions V ₅ and V ₆ are integrated in the plasticized regions W ₄ and W ₅ by friction stir welding.

The manufacturing method of the heat transfer plate 81 includes a chamfering step of chamfering the bottom surface 66 of the upper cover groove 64 after forming the lower lid portion M on the lower portion of the base member 62 by a manufacturing method equivalent to the heat transfer plate 1. It includes an upper lid member inserting step for arranging the upper lid member 70 and an upper lid member joining step for performing friction stir welding along the upper abutting portions V ₅ and V ₆ .

(Chamfering process)
In the chamfering step, the step (groove) and burrs formed on the bottom surface 66 of the upper lid groove 64 are cut and removed, and the bottom surface 66 is smoothed.

(Upper cover member insertion process)
In the upper lid member inserting step, the upper lid member 70 is disposed on the bottom surface of the upper lid groove 64 after the chamfering step. By performing the chamfering step, the lower surface 72 of the upper lid member 70 and the bottom surface of the upper lid groove 64 can be arranged without a gap.

(Top cover member joining process)
In the upper lid member joining step, the joining rotary tool (not shown) is moved along the upper abutting portions V ₅ and V ₆ to perform friction stir welding. The pushing amount of the joining rotary tool in the upper lid member joining step may be appropriately set in consideration of the length of the stirring pin of the joining rotary tool and the thickness F ′ of the upper lid member 70. In the upper lid member joining step, the joining rotary tool 20 used in the first embodiment may be used.

  According to the heat transfer plate 81 according to the embodiment, the heat medium pipe 16 can be disposed at a deeper position by further disposing the upper cover member 70 above the lower cover portion M and performing friction stir welding. it can.

In the fourth embodiment, the two sides of the upper lid member 70 are frictionally stirred to form the two plasticized regions W ₄ and W _5. However, the present invention is not limited to this. For example, the groove width of the upper lid groove 64, and smaller than the outer diameter X ₁ of the shoulder portion 22 of the joining rotation tool 20 (see (a) in FIG. 4), upper lid member by using the joining rotation tool 20 70 may be performed with a single friction stir. Thereby, a joining process can be reduced.

It is the perspective view which showed the heat exchanger plate which concerns on 1st embodiment. (A) is a side view of the rotary tool according to the first embodiment and an exploded side view of the heat transfer plate, and (b) is a schematic layout view of the heat transfer plate according to the first embodiment. It is the side view which showed the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, Comprising: (a) shows the pipe | tube insertion process for heat media which inserted the pipe | tube for heat media, (b) is cover member insertion (C) shows a joining process and (d) shows a completed drawing. (A) is a side view of the rotary tool according to the second embodiment and an exploded side view of the heat transfer plate, and (b) is a schematic layout view of the heat transfer plate according to the second embodiment. It is the side view which showed the manufacturing method of the heat exchanger plate which concerns on 2nd embodiment, Comprising: (a) shows a joining process, (b) shows a completion drawing. (A) is a side view of the rotary tool according to the third embodiment and an exploded side view of the heat transfer plate, and (b) is a schematic layout view of the heat transfer plate according to the third embodiment. It is the side view which showed the heat exchanger plate which concerns on 3rd embodiment. It is a disassembled side view of the heat exchanger plate which concerns on 4th embodiment. It is the side view which showed the heat exchanger plate which concerns on 4th embodiment. It is the figure which showed the conventional heat exchanger plate, Comprising: (a) is a perspective view, (b) is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat-transfer plate 2 Base member 5a Side wall 5b Side wall 6 Lid groove 6a Bottom surface 8 Concave groove 10 Lid member 13a Side surface 13b Side surface 16 Heating medium tube 20 Joining rotary tool V Butting part W Plasticization area

Claims (14)

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 member inserting step of inserting a lid member into the lid groove and bringing the lid member into contact with the bottom surface of the lid groove;
A joining step of performing frictional stirring by moving the rotary tool relative to the abutting portion where the side wall of the lid groove and the side surface of the lid member face each other,
The outer diameter of the shoulder portion of the rotating tool is not less than the width of the opening of the lid groove,
In the joining step, in a state where the heat medium pipe is not plastically deformed, the rotary tool is moved once, and a butt portion between one side wall of the lid groove and one side surface of the lid member, and A method of manufacturing a heat transfer plate, wherein friction stir is simultaneously performed on an abutting portion between the other side wall of the lid groove and the other side surface of the lid member.   The method for manufacturing a heat transfer plate according to claim 1, wherein a distance from a bottom portion of the concave groove to a lower portion of the lid member is larger than a vertical height of the heat medium pipe.   3. The heat transfer plate according to claim 1, wherein a lower portion of the lid member is formed along a shape of the heat medium pipe and is in contact with the heat medium pipe. Production method.   3. The filling step of filling a space surrounded by the concave groove and the periphery of the heat medium pipe before the lid member inserting step is filled with a heat conductive material. The manufacturing method of the heat exchanger plate as described in 2.   The method for manufacturing a heat transfer plate according to claim 4, wherein the heat conductive material is a metal powder, a metal powder paste, or a metal sheet.   The said heat conductive substance is a low melting-point brazing material, The manufacturing method of the heat exchanger plate of Claim 4 or Claim 5 characterized by the above-mentioned.   The method for manufacturing a heat transfer plate according to any one of claims 1 to 6, wherein a maximum diameter of the stirring pin of the rotary tool is equal to or greater than a width of the lid groove.   The method for manufacturing a heat transfer plate according to any one of claims 1 to 6, wherein a minimum diameter of the stirring pin of the rotating tool is equal to or greater than a width of the lid groove.   The deepest portion of the plasticized region formed by friction stirring in the joining step reaches a depth position of the upper 2/3 of the lid member. The manufacturing method of the heat exchanger plate as described in 2.   The deepest portion of the plasticized region formed by friction stirring reaches the depth position of the upper half of the lid member in the joining step. The manufacturing method of the heat exchanger plate as described in 2.   The deepest portion of the plasticized region formed by friction stir in the joining step reaches the depth position of the upper third of the lid member. The manufacturing method of the heat exchanger plate as described in 2. After the joining step,
An upper lid member inserting step of bringing the upper lid member into contact with the bottom surface of the upper lid groove formed wider than the width of the lid groove on the surface side of the base member;
An upper lid member joining step of performing frictional stirring by relatively moving a rotary tool along an upper abutting portion between a side wall of the upper lid groove and a side surface of the upper lid member. Item 12. The method for manufacturing a heat transfer plate according to any one of Items 11 to 11. A base member having a concave groove formed on the bottom surface of the lid groove opening on the front surface side;
A heat medium pipe inserted into the concave groove;
A lid member inserted into the lid groove, and a heat transfer plate that is friction stir welded using a rotary tool and the heat medium tube is not plastically deformed,
A line of plastic formed on the abutting portion between one side wall of the lid groove and one side surface of the lid member and the abutting portion between the other side wall of the lid groove and the other side surface of the lid member. The heat transfer plate is characterized in that the width of the control region is greater than the width of the lid groove. On the surface side of the base member, the base member provided with an upper lid groove formed wider than the lid groove, and an upper lid member inserted into the upper lid groove,
The heat transfer plate according to claim 13, wherein friction stirring is performed along an upper abutting portion between a side wall of the upper lid groove and a side surface of the upper lid member.

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