TWI417500B - A method of manufacturing a heat transfer plate and a heat transfer plate - Google Patents

Description

Heat transfer plate manufacturing method and heat transfer plate

The present invention relates to a method of manufacturing a heat transfer plate for use in, for example, a heat exchanger, a heating machine, or a cooling machine, and a heat transfer plate.

A heat transfer plate disposed in contact with or close to an object to be heat-exchanged, heated, or cooled is a tube for a heat medium in which a heat medium such as a high-temperature liquid or cooling water is circulated, as a base member of the body.

Fig. 22 shows a conventional heat transfer plate (see Patent Document 1), Fig. 22a is a perspective view, and Fig. 22b is a side view. The conventional heat transfer plate 100 includes a base member 102, a heat medium tube 116, and a cover plate 110. The base member 102 has a cover groove 106 having a rectangular cross section opening to the surface and a groove 108 opening to the bottom surface of the cover groove 106. The heat medium tube 116 is inserted into the recess 108, and the cover 10 is inserted into the cover groove 106. The plasticized regions W ₁ , W ₂ are formed by friction stir welding along the flat faces of the side faces 105, 114 of the cover plate 110 along the side walls 105 of the cover groove 106, respectively.

[Previous Technical Literature]

[Patent Literature]

Patent Document 1 Japanese Patent Laid-Open Publication No. 2004-314115

However, the conventional heat transfer plate 100 has at least two friction stirs on the flat surfaces of the side walls 105 of the cover groove 106 and the side faces 113 and 114 of the cover 110, and thus there are many problems in the process.

From this point of view, the present invention provides a method of manufacturing a heat transfer plate having a small number of processes and a heat transfer plate.

A method of manufacturing a heat transfer plate according to the present invention for solving the problem includes: a tube insertion process for a heat medium, and inserting a tube for a heat medium into a groove formed at a bottom of a lid groove opening to a surface side of the base member a cover member insertion process, the cover member is inserted into the cover groove, the cover member abuts against the bottom surface of the cover groove, and the jointing process, the flat portion of the side wall of the cover groove facing the side surface of the cover member is made The rotary tool is frictionally stirred by relative movement, wherein an outer diameter of the shoulder of the rotary tool is larger than a width of the opening of the cover groove, and in the jointing process, in a state where the heat medium tube is not plastically deformed, The rotating tool is moved once, and the flat portion of the side wall of the cover groove and the side surface of the cover member and the side wall of the other side of the cover member are simultaneously rubbed with the flat portion of the other side surface of the cover member. Stir.

According to this manufacturing method, by setting the outer diameter of the shoulder of the rotary tool to be equal to or larger than the width of the opening of the cover groove, the rotary tool can be sequentially moved and frictionally stirred for the pair of projections. Thereby, the work of the joining project can be reduced.

Further, the distance from the bottom of the groove to the lower portion of the cover member is set to be larger than the height of the heat medium tube in the vertical direction.

According to this manufacturing method, since the lid member is separated from the heat medium tube, plastic deformation of the heat medium tube can be surely prevented during friction stir.

Further, the lower portion of the cover member is formed along the shape of the heat medium tube, and is in contact with the heat medium tube. According to this manufacturing method, since the void formed around the tube for the heat medium is reduced, the heat transfer efficiency of the heat transfer plate can be improved.

Further, it is preferable to further include a filling process in which the space surrounded by the groove and the outer peripheral surface of the heat medium tube is filled with a heat conductive material before the cover member is inserted into the work. Further, the thermally conductive material is a metal powder, a metal powder paste, a metal sheet or a low melting point solder material.

According to this manufacturing method, generation of voids formed around the heat medium tube can be suppressed, and heat can be efficiently transmitted via the heat conductive material.

Further, the maximum diameter of the stirring pin of the rotary tool is set to be larger than the width of the cover groove. Further, the minimum diameter of the stirring pin of the rotary tool is set to be larger than the width of the cover groove.

According to this manufacturing method, by setting the size of the stirring pin to be larger than the opening of the lid groove, the rotating tool can be frictionally agitated only by moving the rotary tool only once in the pair of flat portions.

Further, in the above-described joining process, the range (depth) of the plastic fluidization is not limited. However, in order to more strongly bond the lid member and the base member, the deepest portion of the plasticized region is set to descend from the upper surface of the cover member to the cover. A position of 1/3 or more of the thickness dimension of the member. More preferably, the deepest portion of the plasticized region is set to be lowered from the upper surface of the cover member to a position equal to or larger than 1/2 of the thickness of the cover member. It is preferable that the deepest portion of the plasticized region is set to be lowered from the upper surface of the cover member to a position of 2/3 or more of the thickness of the cover member.

Moreover, after the joining process, the upper cover member insertion process further includes: the upper cover member abuts against the bottom surface of the upper cover groove wider than the width of the cover groove on the surface side of the base member; and the upper cover member joint project The rotary tool is frictionally agitated by moving the side of the upper cover groove and the flat portion of the side surface of the upper cover member relative to each other.

According to this manufacturing method, the heat medium tube can be formed at a deeper position by arranging the upper cover member on the cover member.

Further, the method for manufacturing a heat transfer plate according to the present invention is characterized in that a heat transfer plate is provided, the heat transfer plate including a base member which is opened on the surface side and has a groove deeper than a height direction of the heat medium tube, and is inserted into the above a heat medium tube for the groove and a cover member for covering the heat medium tube, the method for manufacturing the heat transfer plate comprising: a heat medium tube insertion process, inserting the heat medium tube into the groove; and a cover member insertion project Inserting the cover member into the upper portion of the heat medium tube; and joining the project, the frictional agitation is performed by moving the rotary tool relative to the flat portion of the side wall of the groove facing the side surface of the cover member, wherein the rotation is performed The outer diameter of the shoulder of the tool is larger than the width of the opening of the groove. In the joining process, the pressing force of the rotary tool is transmitted to the heat medium tube via the cover member, and the heat medium tube is used. In a state of plastic deformation, a flat portion of a side wall of one side of the groove and a side surface of one side of the cover member, and a side wall of the other side of the groove Said flat portion of the cover member side while the other side surface of the friction stir.

According to this manufacturing method, since the outer diameter of the shoulder of the rotary tool is larger than the width of the groove, the rotary tool moves once, and the pair of flat portions of the cover member and the base member can be simultaneously frictionally stirred, thereby reducing the number of working procedures. . Further, since the outer diameter of the shoulder of the rotary tool is larger than the width of the groove, the rotary tool can perform friction stir in a state above the tube for the heat medium. Thereby, since the pressing force of the rotary tool is efficiently transmitted to the heat medium tube through the cover member, the heat medium tube is appropriately plastically deformed, and the adhesion between the groove and the heat medium tube can be improved.

Further, the method for manufacturing a heat transfer plate according to the present invention is characterized in that a heat transfer plate is provided which includes a cover groove having a surface opening on the surface side and a bottom portion of the cover groove and a height in a vertical direction of the heat medium tube. a shallow groove base member, the heat medium tube inserted into the groove, and a cover member covering the heat medium tube, the heat transfer plate manufacturing method comprising: a heat medium tube insertion project, the heat medium Inserting the groove into the groove; inserting the cover member into the upper portion of the heat medium tube; and engaging the same, and rotating the tool toward the flat portion of the side wall of the cover groove facing the side surface of the cover member Performing frictional agitation with relative movement, wherein an outer diameter of a shoulder portion of the rotary tool is larger than a width of an opening portion of the cover groove, wherein in the jointing process, a pressing force of the rotary tool is transmitted to the above via the cover member a tube for a heat medium, in a state in which the heat medium tube is plastically deformed, a flat portion of a side wall of the cover groove and a side surface of one side of the cover member At the same time the lid groove and the other side of the cover member side wall and the other side surface side of the flat portion of the friction stir.

According to this manufacturing method, since the outer diameter of the shoulder of the rotary tool is larger than the width of the cover groove, the rotary tool moves once, and the pair of flat portions of the cover member and the base member can be simultaneously frictionally stirred, thereby reducing the number of working procedures. . Further, since the outer diameter of the shoulder of the rotary tool is larger than the width of the cover groove, the rotary tool can perform friction stir in a state above the tube for the heat medium. Thereby, since the pressing force of the rotary tool is efficiently transmitted to the heat medium tube through the cover member, the heat medium tube is appropriately plastically deformed, and the adhesion between the groove and the heat medium tube can be improved.

Further, in the above joining process, the cover member is brought into contact with the bottom surface of the cover groove. According to this manufacturing method, when the rotary tool is pressed, the cover member abuts against the bottom surface of the cover groove, thereby preventing the heat medium tube from being excessively deformed. That is, the amount of deformation of the heat medium tube can be easily set.

Further, the method for producing a heat transfer plate according to the present invention is characterized in that a heat transfer plate having a cover groove opening to the surface side and a bottom surface opening to the cover groove and being higher than the vertical direction of the heat medium tube is formed. a deep grooved base member, the above-mentioned heat medium tube inserted into the groove, and a cover member having a wide portion inserted into the cover groove and a narrow portion inserted into the groove, the heat transfer plate manufacturing method including: heat a tube insertion process for inserting the heat medium tube into the groove; a cover member insertion process for inserting the cover member into the upper portion of the heat medium tube; and a joining process for the side wall of the cover groove and the cover member a side-facing flat portion that frictionally stirs the rotary tool, wherein an outer diameter of the shoulder of the rotary tool is larger than a width of the opening of the cover groove, wherein in the jointing process, the cover member is passed through the cover member Passing the pressing force of the rotary tool to the heat medium tube, and the side wall of the cover groove and the cover are in a state where the heat medium tube is plastically deformed Side flat portion and the side surface of the groove of the cover member while the other side of the flat portion of the cover member side wall and the other side surface side of the friction stir.

According to this manufacturing method, since the outer diameter of the shoulder of the rotary tool is larger than the width of the cover groove, the rotary tool moves once, and the pair of flat portions of the cover member and the base member can be simultaneously frictionally stirred, thereby reducing the number of working procedures. Further, since the outer diameter of the shoulder of the rotary tool is larger than the width of the cover groove, the rotary tool can perform friction stir in a state above the tube for the heat medium. Thereby, since the pressing force of the rotary tool is efficiently transmitted to the heat medium tube through the cover member, the heat medium tube is appropriately plastically deformed, and the adhesion between the groove and the heat medium tube can be improved.

Moreover, in the above-described joining process, the wide portion of the lid member is brought into contact with the bottom surface of the lid groove. According to this manufacturing method, when the rotary tool is pressed, the cover member abuts against the bottom surface of the cover groove, thereby preventing the heat medium tube from being excessively deformed. That is, the amount of deformation of the heat medium tube can be easily set.

Further, in the above-described joining process, the inner circumference of the vertical section of the region surrounded by the groove and the cover member after the joining process is set to be longer than the outer circumference of the heat medium tube. According to this manufacturing method, the inside of the tube of the heat medium tube is prevented from being deformed by depression.

Moreover, in the above-described joining process, the height of the heat medium tube after the joining process is set to be 70% or more of the height of the heat medium tube before the joining process. Moreover, in the above-described joining process, the height of the heat medium tube after the joining process is set to be 80% or more of the height of the heat medium tube before the joining process. According to this manufacturing method, the tube for the heat medium can be prevented from being excessively collapsed.

Further, the lower portion of the cover member is formed along the shape of the heat medium tube, and is in contact with the heat medium tube. According to this manufacturing method, since the void formed around the tube for the heat medium is reduced, the heat transfer efficiency of the heat transfer plate can be improved.

Further, it is preferable to further include a filling process in which the space surrounded by the groove and the outer peripheral surface of the heat medium tube is filled with a heat conductive material before the cover member is inserted into the work. Further, the thermally conductive material is a metal powder, a metal powder paste, a metal sheet or a low melting point solder material.

According to this manufacturing method, the generation of voids formed around the tube for the heat medium is suppressed, and heat can be efficiently transmitted via the thermally conductive substance.

Further, it is preferable that the maximum diameter of the stirring pin of the rotary tool is set to be larger than the width of the groove. Further, it is preferable that the minimum diameter of the stirring pin of the rotary tool is set to be larger than the width of the groove. Further, it is preferable that the maximum diameter of the stirring pin of the rotary tool is set to be larger than the width of the cover groove. Further, it is preferable that the minimum diameter of the stirring pin of the rotary tool is set to be larger than the width of the cover groove. According to this manufacturing method, by moving the rotary tool once, the pair of flat portions can be more reliably friction stir.

Further, in the above-described joining process, although the range (depth) of the plastic fluidization is not limited, in order to bond the lid member and the base member more strongly, the deepest portion of the plasticized region is preferably set from the upper surface of the lid member. More preferably, the deepest portion of the plasticized region is set to fall from the upper surface of the cover member to 1/2 or more of the thickness of the cover member, at a position of 1/3 or more of the thickness of the cover member. Further, it is more preferable that the deepest portion of the plasticized region is set to be lowered from the upper surface of the cover member to a position equal to or larger than 2/3 of the thickness of the cover member.

Moreover, after the joining process, the upper cover member insertion process further includes: the upper cover member abuts against the bottom surface of the upper cover groove wider than the width of the groove on the surface side of the base member; and the upper cover member joint project, The rotary tool is frictionally agitated by moving the side of the upper cover groove and the flat portion of the side surface of the upper cover member relative to each other.

Moreover, after the joining process, the upper cover member insertion process further includes: the upper cover member abuts against the bottom surface of the upper cover groove wider than the width of the cover groove on the surface side of the base member; and the upper cover member joint project The rotary tool is frictionally agitated by moving the side of the upper cover groove and the flat portion of the side surface of the upper cover member relative to each other.

According to this manufacturing method, the heat medium tube can be formed at a deeper position by arranging the upper cover member above the cover member.

Further, the heat transfer plate of the present invention comprises: a base member having a recess formed in a bottom surface of the cover groove opening on the surface side; a heat medium tube inserted into the groove; and a cover member inserted into the above a cover groove in which the heat medium tube is not plastically deformed while performing friction stir welding using a rotary tool, wherein a flat portion of a side wall of one side of the cover groove and a side surface of the cover member, and the cover The width of the plasticized region of one of the side walls of the other side of the groove and the flat portion of the other side of the cover member is larger than the width of the cover groove.

According to this configuration, by setting the outer diameter of the shoulder of the rotary tool to be equal to or larger than the width of the opening of the cover groove, the rotary tool is moved only once by moving the rotary tool for the pair of flat portions. Thereby, the heat transfer plate can be manufactured with a small number of processes.

Furthermore, the present invention further includes a base member having an upper cover groove formed on a surface side of the base member and wider than the cover groove; and an upper cover member inserted into the upper cover groove, wherein the side wall along the upper cover groove and the upper cover The flat portion of the side of the member is friction stir.

According to this configuration, the heat medium tube can be formed at a deeper position by arranging the upper cover member above the cover member.

Further, the heat transfer plate of the present invention comprises: a base member having a groove opening on the surface side and deeper than a height direction of the heat medium tube; and a heat medium tube inserted into the bottom of the groove; a cover member covering the heat medium tube in the groove to frictionally stir the base member and the cover member, and the heat medium tube is plastically deformed, wherein a side wall of one side of the cover groove is The width of the plasticized region of one of the flat portion of the side surface of the cover member and the flat portion of the other side of the cover groove and the side surface of the other side of the cover member is larger than the width of the groove.

According to this configuration, by setting the outer diameter of the shoulder of the rotary tool to be larger than the width of the opening of the groove, the movement of the primary rotation estimator can simultaneously simultaneously rub the pair of flat portions of the cover member and the base member. Stir. Thereby, the operating procedure can be reduced. Further, since the outer diameter of the shoulder of the rotary tool is larger than the width of the groove, the friction stir can be performed in a state where the rotary tool is positioned above the heat medium tube. Thereby, since the pressing force of the rotary tool is efficiently transmitted to the heat medium tube via the cover member, the heat medium tube can be appropriately deformed, and the adhesion between the groove and the heat medium tube becomes high.

Furthermore, it is preferable to further include a base member having an upper cover groove formed on a surface side of the base member and wider than the groove; and an upper cover member inserted into the upper cover groove, wherein the side wall along the upper cover groove and the upper cover The flat portion of the side of the member is friction stir.

According to this manufacturing method, the heat medium tube can be formed at a deeper position by arranging the upper cover member above the cover member.

Further, the heat transfer plate of the present invention comprises: a base member having a recess opening to the bottom surface of the cover groove on the surface side and shallower than the vertical direction of the heat medium tube; a heat medium tube inserted into the concave portion a groove member; and a cover member covering the heat medium tube in the groove to frictionally stir the base member and the cover member, and the heat medium tube is plastically deformed, wherein one side of the cover groove is The width of the plasticized region formed by the flat portion of the side wall and the side surface of the one side of the cover member and the side wall of the other side of the cover groove and the side surface of the other side of the cover member is larger than the width of the cover groove width.

Further, the heat transfer plate of the present invention comprises: a base member having a recess opening to the bottom surface of the cover groove on the surface side and deeper than the vertical direction of the heat medium tube; a heat medium tube inserted into the concave portion a cover member having a wide portion inserted into the cover groove and a narrow portion inserted into the groove to frictionally agitate the base member and the cover member, and the heat medium tube is plastically deformed, wherein The width of the plasticized region formed by the flat portion of the side wall of one side of the lid groove and the side surface of the lid member, and the flat portion of the side wall of the other side of the lid groove and the side surface of the other side of the lid member It is larger than the width of the above cover groove.

According to this configuration, by setting the outer diameter of the shoulder portion of the rotary tool to be larger than the width of the opening portion of the groove, the movement of the primary rotary tool can simultaneously simultaneously friction stir the pair of flat portions of the cover member and the base member. . Thereby, the operating procedure can be reduced. Further, since the outer diameter of the shoulder of the rotary tool is larger than the width of the groove, the friction stir can be performed in a state where the rotary tool is positioned above the heat medium tube. Thereby, since the pressing force of the rotary tool is efficiently transmitted to the heat medium tube via the cover member, the heat medium tube can be appropriately deformed, and the adhesion between the groove and the heat medium tube becomes high.

Furthermore, it is preferable to further include a base member having an upper cover groove formed on a surface side of the base member and wider than the cover groove; and an upper cover member inserted into the upper cover groove, wherein the side wall along the upper cover groove and the upper cover The flat portion of the side of the member is friction stir.

According to this manufacturing method, the heat medium tube can be formed at a deeper position by arranging the upper cover member above the cover member.

According to the method of manufacturing a heat transfer plate of the present invention, the heat transfer plate is manufactured in a small number of processes.

[First Embodiment]

Embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, the heat transfer plate 1 of the first embodiment mainly includes a base member 2 having a thick plate shape having a front surface 3 and a back surface 4, and is disposed in the cover groove 6 (the cover groove 6 is opened in the cover groove 6). the plasticized regions 32 of the surface of the base member) 10 and a lid member 8 is inserted into the recess (groove 8 open to the bottom surface of the cover opening lines 6 6a) of the heat medium pipe 16, friction stir welding is formed by W ₁ And integrated. Here, the "plasticized region" includes a state in which it is plasticized by frictional heat of the rotary tool and a state in which the rotary tool passes and returns to normal temperature.

As shown in Fig. 2, the base member 2 has an effect of transferring heat of the heat medium flowing into the heat medium tube 16 to the outside, or an effect of transferring external heat to the heat medium flowing through the heat medium tube 16. . A cover groove 6 is recessed in the surface 3 of the base member 2, and a groove 8 narrower than the cover groove 6 is recessed in the center of the bottom surface 6a of the cover groove 6. The cover groove 6 is a portion where the cover member 10 is disposed, and is continuously formed across the longitudinal direction of the base member 2. The cover groove 6 has a rectangular cross section and has side walls 5a, 5b which are vertically erected from the bottom surface 6a of the cover groove 6.

The groove 8 is a portion into which the heat medium tube 16 is inserted, and is continuously formed across the longitudinal direction of the base member 2. The groove 8 has a U-shaped groove as a cross section of the upper opening, and a bottom portion 7 having a semicircular cross section at the lower end. The width A of the opening portion of the groove 8 is formed substantially the same as the outer diameter B of the heat medium tube 16, the depth C of the groove 8 is formed larger than the outer diameter B of the heat medium tube 16, and the width E of the cover groove 6 is formed to be concave. The width A of the groove 8 is also large, and the depth J of the cover groove 6 is formed to be substantially equal to the thickness of the cover member 10 to be described later. Further, the material of the base member 2 is not particularly limited, and is formed, for example, of an aluminum alloy (JIS: A6061).

As shown in FIGS. 1 and 2, the cover member 10 is formed of an aluminum alloy of the same type as the base member, and has a rectangular cross section substantially the same as the cross section of the cover groove 6 of the base member 2, and has an upper surface 11 and a lower surface. 12. Side 13a and side 13b. Further, the thickness F of the cover member 10 is formed to be substantially equal to the depth J of the cover groove 6, and the width G of the cover member 10 is formed to be substantially equal to the width E of the cover groove 6.

As shown in Fig. 2b, when the cover member 10 is inserted into the cover groove 6, the lower surface 12 (lower portion) of the cover member 10 abuts against the bottom surface 6a of the cover groove 6. The side faces 13a, 13b of the cover member 10 are in surface contact with the side walls 5a, 5b of the cover groove 6 or face each other with a fine gap. This flat side surface side of the lid member 13a and the cover side of the groove 10 of the side wall 5a of 6 or less flat portion V _1. Further, the flat surface portion of the cover member 10 on the other side and the side wall 5b of the other side of the cover groove 6 are below the flat portion V ₂ . Further, the flat portion V ₁ and the flat portion V ₂ are also referred to as a flat portion V.

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

The heat medium tube 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 transfer heat to the base member 2 and the lid member 10, or heats such as a coolant or a cooling gas. The medium circulates in the hollow portion 18 to transfer heat from the base member 2 and the cover member 10. Further, the hollow portion 18 of the heat medium tube 16 may be transferred to the base member 2 and the member of the cover member 10 by heat generated by the heater, for example, by a heater.

Further, in the first embodiment, the heat medium tube 16 has a circular cross section, but may have an angular shape when viewed in cross section. Further, although the heat medium tube 16 uses a copper tube in the first embodiment, a tube of another material may be used.

Further, in the first embodiment, although the bottom portion 7 of the recess 8 is in surface contact with the lower half of the heat medium tube 16 and the upper end of the heat medium tube 16 is separated from the lower surface 12 of the cover member 10, it is not limited thereto. this. For example, the depth C and the outer diameter B of the groove 8 may be formed within a range of B ≦ C < 1.2B. Further, the width A of the groove, 8 and the outer diameter B of the heat medium tube 16 may be formed in the range of B ≦ A < 1.1B.

Here, as shown in Fig. 2b, the lower surface 12 of the cover member 10 abuts against the bottom surface 6a of the cover groove 6, and the depth C of the groove 8 is formed larger than the outer diameter B of the heat medium tube 16. Therefore, after the heat medium tube 16 is inserted into the groove 8 of the base member 2, when the cover member 10 is inserted into the cover groove 6, the groove 8 and the outer periphery of the heat medium tube 16 and the lower surface 12 of the cover member 10 are formed. In the space portion P, the space portion P is filled with a heat conductive material to be described later.

As shown in Fig. ₁ , the plasticized region W ₁ is a region in which the base member 2 and a part of the cover member 10 are plastically flowed and integrated while performing friction stir welding on the flat portions V ₁ and V ₂ . . In the present embodiment, the plasticized region W ₁ is the maximum width Wa (width of the surface 3) is formed larger than the width E (refer to FIG. 2a) of the lid groove 6.

In the present embodiment, the deepest portion of the plasticized region W ₁ is set to be reached while the cover member substantially in the middle (on the side of the cover member 10 to a depth of about 1/2) 10, the size of the plasticized region W ₁ according to the line cover member 10 The size is appropriately set and the size of the rotary tool to be described later. For example, the deepest portion of the plasticized region W ₁ is set to a position of about 2/3 to 1/3 of the upper side of the cover member 10.

Next, a method of manufacturing the heat transfer plate 1 will be described using FIG. Fig. 3 is a side view showing a method of manufacturing a heat transfer plate according to the first embodiment, Fig. 3a is a view showing a heat medium tube insertion process for inserting a heat medium tube, Fig. 3b is a cover member insertion process, and Fig. 3c is a view showing a joint. Engineering, Figure 3d shows the completion map.

The method for manufacturing a heat transfer plate according to the first embodiment includes a preparation process for forming the base member 2, a heat medium tube insertion process for inserting the heat medium tube 16 into the groove 8 formed in the base member 2, and filling the heat conductive material 25 The filling process on the groove 8 and the heat medium tube 16 , the lid member insertion process in which the lid member 10 is inserted into the lid groove 6 , and the joining process in which the joining rotary tool 20 is moved along the flat portion V to perform friction stir.

First, the rotation tool used for the friction stir of the joining process will be described with reference to Fig. 2a. The joining rotary tool 20 used in the present embodiment is formed of, for example, tool steel, and has a cylindrical shoulder portion 22 and a stirring pin 26 that hangs from the center portion of the lower surface portion 24 with a concentric axis. The agitating pin 26 is formed in a tapered shape having a small width toward the distal end and is formed in a length L _A . Further, on the circumferential surface of the stirring pin 26, a plurality of small grooves (not shown) along the axial direction and a screw groove in the radial direction are formed.

In the present embodiment, the outer diameter X _{1 of the} shoulder portion 22 is formed to have a size equal to or larger than the width E of the lid groove 6. Whereby, by (lid groove 6) the bonding tool 20 moves along the rotary member 10 once the cover for the butt portion V _1, V ₂ while performing the friction stir.

Further, in the present embodiment, the joining rotary tool 20 is set as described above, and for example, the bottom end portion (maximum outer diameter X ₂ ) of the stirring pin 26 can be set to be equal to or larger than the width E of the lid groove 6. Further, for example, the tip end portion (minimum outer diameter X ₃ ) of the stirring pin 26 is set to be equal to or larger than the width E of the lid groove 6. As described above, with respect to the width E, the size of the joining rotary tool 20 is set to be large, and the flat portions V ₁ and V ₂ are surely frictionally stirred by the sequential movement.

(preparation project)

First, referring to Fig. 2a, a cover groove 6 is formed on the thick plate portion by, for example, flat end mill processing. Then, a groove 8 having a semicircular cross section is formed on the bottom surface 6a of the cover groove 6 by, for example, ball end milling. Thereby, the groove 8 which has the cover groove 6 and the bottom face 6a opened in the cover groove 6 is formed. The groove 8 has a bottom portion 7 having a semicircular cross section in the lower half, and is open upward from the upper end of the bottom portion 7 with a predetermined width.

Further, although the base member 2 is formed by cutting in the present embodiment, an extruded shape of an aluminum alloy can also be used.

(heat media tube insertion project)

Next, as shown in Fig. 3a, the heat medium tube 16 is inserted into the recess 8. The lower half of the heat medium tube 16 is in surface contact with the bottom portion 7 forming the lower half of the recess 8.

(filling project)

Next, as shown in Fig. 3a, the thermally conductive material 25 is filled in a portion surrounded by the groove 8 and the heat medium tube 16. In the filling process, the upper surface filled to the thermally conductive substance 25 is flush with the bottom surface 6a of the lid groove 6. The space P is filled in the space P by the heat conductive material 25 (see FIG. 2b), and the space portion P is buried to improve the heat transfer efficiency of the heat transfer plate 1, and the effect of improving watertightness and airtightness is obtained. In the present embodiment, the thermally conductive material 25 is a low melting point welding material using a known machine powder. Further, the heat conductive material 25 buryes the space portion P of the heat transfer plate 1 as long as it is a material having high heat transfer efficiency, and may be a metal powder paste or a metal sheet.

(cover member insertion project)

Next, as shown in Fig. 3b, the cover member 10 is inserted into the cover groove 6 of the base member 2. At this time, while the lower surface 12 of the cover member 10 abuts against the bottom surface 6a of the cover groove 6, the upper surface 11 of the cover member 10 is flush with the surface 3 of the base member 2. Further, by the groove side walls 5a 6 of the lid, the side surface 5b of the cover member 10 13a, 13b are formed flat portions V _1, V _2.

(joining engineering)

Subsequently, as shown in FIG. 3c of, for butt portion V (butt portions V _1, V ₂₎ using the rotary tool 20 engaging the friction stir. After the center of the joining rotary tool 20 is joined to the center of the cover groove 6 in the width direction, the lower surface 24 of the shoulder portion 22 of the joining rotary tool 20 is pressed to a predetermined depth to the surface 3 of the base member 2 along the flat portion. V does relative movement.

In the present embodiment, the number of revolutions of the joining rotary tool 20 is, for example, 50 to 1,500 rpm, the conveying speed is 0.05 to 2 m/min, and the force applied to the joining rotary tool 20 in the axial direction is 1 kN to 20 kN.

As shown in Fig. 3d, 3 project is formed by the engagement of the plasticized region W ₁ on the surface of the base member 2. In the present embodiment, the pushing amount is set stirring pin 20 of the rotary tool 26 and the bonding length, so that the plasticized region W ₁ reaches the deepest portion of the cover member 10 is substantially central. Further, the depth Wb of the plasticized region W1 in the flat portions V ₁ and V ₂ is set to be about 1/4 of the thickness of the cover member 10. The butt portion V _1, V ₂ of the plasticized region W depth Wb ₁ is set large, the bonding force to improve the base member 2 and the lid member 10.

Further, the size (depth) of the plasticized region W ₁ , the shape of the joining rotary tool 20 , the number of rotations, the amount of pressing, and the like are merely examples, and are not limited thereto, and the materials of the base member 2 and the cover member 10 are added. Just set it appropriately.

As described above, according to the method of manufacturing the heat transfer plate of the present embodiment, since the outer diameter X ₁ of the shoulder portion 22 of the joining rotary tool 20 is set to be larger than the width E of the cover groove 6, the joining rotary tool 20 is only along When the center of the cover member 10 in the width direction is moved once, the flat portions V ₁ and V ₂ can be frictionally stirred at the same time, and the base member 2 and the cover member 10 are integrated by friction stir.

Further, since the lower surface 12 of the cover member 10 abuts against the bottom surface 6a of the cover groove 6, the heat medium tube 16 and the cover member 10 are separated. Therefore, even if the joining rotary tool 20 is pressed from the upper surface 11 of the cover member 10, heat is applied. The media tube 16 will not collapse. Thereby, the flow path of the heat medium tube 16 can be surely secured. Moreover, the heat medium tube 16 is placed at a deep position of the base member 2 by increasing the height of the lid groove 6 and the lid member 10 in the vertical direction.

Further, by filling the heat conductive material 25 in the space portion P formed around the heat medium tube 16 (see FIG. 2b), heat from the heat medium can be efficiently transmitted. Moreover, the airtightness and watertightness of the heat transfer plate 1 are improved by burying the space portion P which may be formed inside the heat transfer plate 1.

In the present embodiment, the joining process is performed in a state in which the heat medium tube 16 and the lid member 10 are separated from each other. However, the present invention is not limited thereto, and the heat medium tube 16 can be joined in contact with the lid member 10. engineering.

[Second embodiment]

Next, a method of manufacturing a heat transfer plate and a heat transfer plate according to a second embodiment of the present invention will be described.

As shown in Fig. 4, the heat transfer plate of the second embodiment differs from the first embodiment in the feature that the cover member 30 has a substantially T-shaped cross section. Further, the description of the portions overlapping with the first embodiment will be omitted.

As shown in Fig. 4, a cover groove 36 is formed on the surface 33 of the base member 32, and a groove 38 narrower than the cover groove 36 is recessed in the center of the bottom surface 36a of the cover groove 36. The cover groove 36 is a portion where the cover member 30 is disposed, and is continuously formed across the longitudinal direction of the base member 32. The cover groove 36 has a rectangular cross section and is provided with side walls 35a, 35b which are vertically erected from the bottom surface 36a of the cover groove 36. The width e of the cover groove 36 is formed to be substantially equal to the width g ₁ of the cover member 30 to be described later, and the depth j of the cover groove 36 is formed to be substantially equal to the depth f _{1 of the} cover member 30.

The groove 38 is a portion into which the heat medium tube 16 and the lid member 30 are inserted, and is continuously formed across the longitudinal direction of the base member 32. The groove 38 is a U-shaped groove having a cross section opened upward, and a bottom portion 37 having a semicircular cross section is formed at the lower end. The width A of the groove 38 is formed to be substantially the same as the outer diameter B of the heat medium tube 16.

The cover member 30, as shown in Fig. 4a, is an element that is inserted into the cover groove 36 and the recess 38 of the base member 32, and has a wide portion 41 having a large width and a narrow portion 42 narrower than the width 41. The wide portion 41 has an upper surface 43, a lower surface 44, and side surfaces 43a, 43b. The width g _{1 of the} wide portion 41 is formed to be slightly equal to the width e of the cover groove 36, and the thickness f _{1 is} formed to be substantially equal to the depth j of the cover groove 36.

The narrow portion 42 extends from the center of the lower surface 44 of the wide portion 41 to the lower side. The width g _{2 of the} narrow portion 42 is formed to be substantially equal to the width A of the groove 38.

As shown in Fig. 4b, when the cover member 30 is inserted into the cover groove 36, the lower surface 44 of the wide portion 41 of the cover member 30 abuts against the bottom surface 36a of the cover groove 36. The side faces 43a, 43b of the wide portion 41 are in surface contact with the side walls 35a, 35b of the cover groove 36 or face each other with a fine gap. Thereto, the side surface side of the cover member 30 and the cover 43a of the groove side of the side wall 35a 36 of the flat planar surface portion hereinafter referred to V _3. And, the other side surface side of the cover member 30 and the cover 43b of the other side of the groove side walls 35b 36 of the flat planar surface portion hereinafter referred to V _4. Further, the flat portion V ₃ and the flat portion V ₄ may be simply referred to as a flat portion V.

Further, when the cover member 30 is inserted into the cover groove 36, both side faces of the narrow portion 42 of the cover member 30 are in surface contact with both side faces of the 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 tube 16 is formed to be smaller than the depth c of the groove 38. In other words, as shown in Fig. 4b, the distance from the bottom portion 37 of the recess 38 to the lower surface 45 of the narrow portion 42 of the cover member 30 is larger than the outer diameter B of the heat medium tube 16. Therefore, as shown in Fig. 4b, when the cover member 30 is inserted into the cover groove 36, the upper end of the heat medium tube 16 and the lower surface 45 of the narrow portion 42 are separated at a predetermined interval.

Thereby, after the heat medium tube 16 is inserted into the groove 38 of the base member 32, when the cover member 30 is inserted into the cover groove 36, the outer periphery of the groove 38, the heat medium tube 16 and the lower surface 45 of the cover member 30 are formed. The formed space portion P1. The thermally conductive substance is filled in the space portion P1.

Next, a method of manufacturing the heat transfer plate 49 of the second embodiment will be described using FIG. Fig. 5a is a view showing a joining process of the second embodiment, and Fig. 5b is a completed view of the second embodiment.

The method for manufacturing a heat transfer plate according to the second embodiment includes a preparation process for forming the base member 32, a heat medium tube insertion process for inserting the heat medium tube 16 into the groove 38 formed in the base member 32, and filling the heat conductive material 25 The filling process on the groove 38 and the heat medium tube 16 , the lid member insertion process in which the lid member 10 is inserted into the lid groove 36 , and the joining process in which the joining rotary tool 20 is moved along the flat portion V to perform friction stir.

In addition, the preparation process of the method of manufacturing the heat transfer plate of the second embodiment and the pipe insertion process for the heat medium are substantially the same as those of the first embodiment, and the description thereof is omitted.

(filling project)

As shown in Fig. 5a, the portion surrounded by the groove 38 and the heat medium tube 16 is filled with the heat conductive material 25. In the present embodiment, the thermally conductive material 25 is filled with a predetermined thickness in a portion surrounded by the heat medium tube 16, the groove 38, and the lower surface 45 of the lid member 30.

(cover member insertion project)

In the cover member insertion process, referring to Fig. 4, the cover member 30 is inserted into the cover groove 36 of the base member 32. At this time, while the lower surface 44 of the wide portion 41 of the cover member 30 abuts against the bottom surface 36a of the cover groove 36, 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 is in contact with the thermally conductive material 25.

(joining engineering)

In joining the project, with reference to FIGS. 5a and 5b, for the butt portion V _1, V ₂ using the bonding tool 20 with the rotary friction stir. That is, after the center of the joining rotary tool 20 is joined to the center of the cover groove 36 in the width direction, the lower surface 24 of the shoulder portion 22 of the joining rotary tool 20 is pressed to a predetermined depth to the surface 3 of the base member 32, along the flat The joint V is relatively moved.

According to the method of manufacturing the heat transfer plate of the present embodiment described above, the outer diameter X ₁ of the shoulder portion 22 of the joining rotary tool 20 is set to be larger than the width e of the lid groove 36, and the joining rotary member 20 is caused to follow. The center of the cover member 30 in the width direction is moved only once, and the flat portions V ₃ and V _{4 can} be frictionally stirred at the same time, and the base member 32 and the cover member 30 can be frictionally stirred to be integrated. That is, the maximum width of the plasticized region W ₂ formed by the joining process is formed larger than the width e of the cover groove 36.

Further, since the lower surface 44 of the wide portion 41 of the cover member 30 abuts against the bottom surface 36a of the cover groove 36 and the lower surface 45 of the narrow portion 42 is separated from the heat medium tube 16, even if pressed from the upper surface 43 of the cover member 30 The joining rotary tool 20 does not damage the heat medium tube 16. Thereby, the flow path of the heat medium tube 16 can be surely secured. Moreover, the length (depth) of the narrow portion 42 of the cover member 30 and the groove 38 is set to be long, and the heat medium tube 16 is disposed at a deep position.

[Third embodiment]

Next, a method of manufacturing the heat transfer plate according to the third embodiment of the present invention will be described.

The method for manufacturing the heat transfer plate according to the third embodiment is different from the first embodiment in that the lower portion of the cover member 50 is formed along the shape of the heat medium tube 16 as shown in Fig. 6a. Further, the description of the portions overlapping with the first embodiment will be omitted.

The cover member 50 of the third embodiment, as shown in Fig. 6a, is a member that is inserted into the cover groove 6 of the base member 2 and a part of the recess 8, and has a wide portion 51 having a large width and a width ratio wide portion. 51 narrow narrow portion 52. The wide portion 51 has an upper surface 53, a lower surface 55, and side surfaces 54a, 54b. The width G of the wide portion 51 is substantially equal to the width E of the cover groove 6, and the thickness F is formed to be substantially equal to the depth J of the cover groove 6. The narrow portion 52 extends from the center of the lower surface 55 of the wide portion 51 to the lower side. In the lower portion of the narrow portion 52, a curved portion 56 having the same curvature as the outer diameter B of the heat medium tube 16 is formed. The width G1 of the narrow portion 52 is formed to be slightly equal to the width A of the groove 8.

As shown in Fig. 6b, when the cover member 50 is inserted into the cover groove 6, the lower surface 55 of the wide portion 51 of the cover member 50 abuts against the bottom surface 6a of the cover groove 6, the curved portion 56 of the narrow portion 52 and the heat medium Abutted by the tube 16. That is, as shown in Fig. 2b, when the lower surface 12 of the cover member 10 is flat, the space portion P is formed. As in the third embodiment, the lower end of the cover member 10 is formed by the outer diameter B of the heat medium tube 16 This can seal the periphery of the heat medium tube 16.

Further, the method of manufacturing the heat transfer plate according to the third embodiment is the same as that of the first embodiment except that the filling process is not included, and detailed description thereof will be omitted.

According to the method of manufacturing the heat transfer plate of the third embodiment, as shown in Fig. 7, since the lower surface 55 of the wide portion 51 of the cover member 50 abuts against the bottom surface 6a of the cover groove 6, even from the upper surface 53 of the cover member 50 When the joining rotary tool 20 is press-fitted and friction stir is performed, the heat medium tube 16 is not damaged. Further, since the lower portion of the cover member 50 is formed along the outer circumference of the heat medium tube 16, it is possible to prevent the occurrence of voids. Thereby, the heat transfer efficiency of the heat transfer plate 61 can be improved.

Further, in the present embodiment, the cross-sectional shape of the lower portion of the narrow portion 52 is formed by the outer circumference of the heat medium tube 16 to form an arc, and when the cross-sectional shape of the heat medium tube is another shape, the shape can be imitated. The shape of the narrow portion 52 is formed.

[Fourth embodiment]

Next, a method of manufacturing the heat transfer plate and the heat transfer plate of the fourth embodiment will be described. Fig. 8 is an exploded side view showing the heat transfer plate of the fourth embodiment. Fig. 9 is a side view of the heat transfer plate of the fourth embodiment.

The heat transfer plate 81 of the fourth embodiment shown in Figs. 8 and 9 includes a structure substantially equal to that of the heat transfer plate 1 (see Fig. 1) of the first embodiment, and is further provided on the surface side of the cover member 10. The feature that the upper cover member 70 is disposed and friction stir welded and joined is different from that of the first embodiment.

Further, the same structure as the heat transfer plate 1 described above is hereinafter referred to as a lower cover portion M. The members that are the same as those of the heat transfer plate 1 of the first embodiment are denoted by the same reference numerals, and the description thereof will not be repeated.

The heat transfer plate 81 has a base member 62, a heat medium tube 16 inserted into the groove 8, a cover member 10, and an upper cover member 70 disposed on the surface side of the cover member 10, as shown in Figs. 8 and 9. The plasticized region W ₁ and the plasticized regions W ₄ and W ₅ are integrated by friction stir.

The base member 62 is as shown in Figs. 8 and 9. The upper surface of the base member 62 has an upper cover groove 64 formed on the surface 63 of the base member 62, the cover groove 6 continuously formed in the longitudinal direction of the bottom surface 66 of the upper cover groove 64, and the cover groove 6 in the cover groove 6. A groove 8 formed by traversing the bottom surface in the longitudinal direction. The upper cover groove 64 has a rectangular cross section and has side walls 65a, 65b vertically erected from the bottom surface 66. The width of the upper cover groove 64 is formed to be larger than the width of the cover groove 6.

As shown in FIG. 8, the heat medium pipe 16 is inserted into the recess 8 formed in the lower base member 62 is used, closed by a lid member 10, _an engagement by friction in the plasticized regions W stir welding. That is, the lower cover portion M formed inside the base member 62 is substantially the same as the heat transfer plate 1 of the first embodiment.

Further, in the bottom surface 66 of the upper cover groove 64, a step and a burr may occur due to friction stir welding. Thus, for example, the surface of the plasticized region W ₁ as a reference, preferably to a bottom surface of the upper lid groove 64 face cutting 66 embodiment is formed smooth. Thereby, the lower surface 72 of the upper cover member 70 is disposed without a gap with the bottom surface 66 of the upper cover groove 64 after the surface cutting.

As shown in FIGS. 8 and 9, the upper cover member 70 is made of, for example, an aluminum alloy, and has a rectangular cross section which is substantially the same as the cross section of the upper cover groove 64, and has a side surface 73a and a side surface 73b which are vertically formed from the lower surface 72. The upper cover member 70 is inserted into the upper cover groove 64. That is, the side faces 73a, 73b of the upper cover member 70 are in surface contact with the side walls 65a, 65b of the upper cover groove 64 or are arranged with a fine gap. Thereto, the side surface 73a and the flat surface side of the side wall 65a of the upper side of the flat portion referred to as V _5. Further, the other side of the other side wall 65b and the side surface 73b of the flat side of the flat side surface hereinafter far portion V _6. The upper flat 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 the surface cutting process for the surface cutting of the bottom surface 66 of the upper cover groove 64, and the upper cover member by the same manufacturing method as the heat transfer plate 1 after the lower cover portion M is formed at the lower portion of the base member 62. The upper cover member of the 70 is inserted into the project, and the upper cover member joining process is performed by friction stir welding along the upper flat portions V ₅ and V ₆ .

(face cutting engineering)

In the surface cutting process, the step (groove) and the burr formed on the bottom surface 66 of the upper cover groove 64 are removed, and the bottom surface 66 is smoothed.

(Upper cover member insertion project)

In the upper cover member insertion process, the upper cover member 70 is disposed on the bottom surface of the upper cover groove 64. By performing the surface cutting process, the lower surface 72 of the upper cover member 70 and the bottom surface of the upper cover groove 64 are disposed without a gap.

(Upper cover member joining project)

In the upper cover member joining process, the joining rotary tool (not shown) is moved along the upper flat portions V ₅ and V ₆ to perform friction stir welding. The press-fitting amount of the joining rotary tool in the upper cover member joining process is appropriately set in consideration of the length of the stirring pin of the joining rotary tool and the thickness F' of the upper cover member 70. Further, in the joining operation of the upper cover member, the joining rotary tool 20 used in the first embodiment can be used.

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

Further, in the fourth embodiment, the plasticized regions W ₄ and W ₅ are formed by friction stir mixing on both side surfaces of the upper cover member 70, but the present invention is not limited thereto. For example, the groove width of the upper lid groove 64 is smaller than the outer diameter X ₁ of the shoulder portion 22 of the joining rotary tool 20 (see FIG. 4a), and the upper cover member 70 is frictionally agitated by the joining rotary tool 20. As a result, the number of procedures required for the joint work will be reduced.

Next, the heat transfer plates of the fifth embodiment to the ninth embodiment will be described in detail with reference to the drawings. The heat transfer plates of the fifth embodiment to the ninth embodiment are different from the first embodiment in that the heat medium tube is plastically deformed. In other words, in the fifth embodiment to the ninth embodiment, the heat medium tube is press-fitted through the lid member, and the heat medium tube is plastically deformed while performing friction stir welding.

[Fifth Embodiment]

The heat transfer plate 10 of the fifth embodiment mainly includes a base member 2 having a groove 8 opened in the surface 3, a heat medium tube 16 inserted into the groove 8, and an insertion as shown in Figs. 10 and 11. The groove 8 covers the member 10. The plasticized region W ₁ formed by friction stir welding is integrally formed. As shown in Fig. 10b, the heat medium tube 16 of the heat transfer plate 101 is different from the first embodiment in that it is plastically deformed from above.

As shown in Fig. 11, the base member 2 achieves the effect of transferring the heat of the heat medium flowing into the heat medium tube 16 to the outside, or the effect of transferring the external heat to the heat medium flowing in the heat medium tube 16. . A groove 8 opened upward is recessed on the surface 3 of the base member 2.

The groove 8 is a portion into which the heat medium tube 16 is inserted, and is continuously formed across the longitudinal direction of the base member 2. The groove 8 has a U-shaped groove in a cross section of the upper opening, a bottom portion 7 formed by a curved surface formed with a predetermined curvature at the lower end, and side walls 8a, 8b which are continuous at the bottom portion 7 and separated by a predetermined width.

The width A of the groove 8 (the distance between the side wall 8a and the side wall 8b) is formed larger than the outer diameter B1 of the heat medium tube 16, and the depth C of the groove 8 is formed larger than the outer diameter B1 of the heat medium tube 16. Further, the curvature of the bottom portion 7 is smaller than the curvature of the outer circumference of the heat medium tube 16. The base member 2 is formed of an aluminum alloy (JIS: A6061).

The heat medium tube 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 transfer heat to the base member 2 and the lid member 10, or heats such as a coolant or a cooling gas. The medium circulates in the hollow portion 18 to transfer heat from the base member 2 and the cover member 10.

The heat medium tube 16, as shown in Fig. 11, has a circular cross section before the joining process, as shown in Fig. 10b, and is plasticized along the shape of the groove 8 and the cover member 10 by the joint work. Deformation. The pressure state of the heat medium tube 16 will be described later.

Further, the heat medium flowing through the heat medium tube 16 is not particularly limited, and for example, the heater is passed through the hollow portion 18 of the heat medium tube 16, and the heat generated by the heater is transmitted to the base member 2 and The components of the cover member 10 are utilized.

Further, the shape of the heat medium tube 16 before the joining process is circular in the present embodiment, but is not particularly limited, but may be angular in cross section. Further, although the heat medium tube 16 uses a copper tube in the first embodiment, a tube of another material may be used. Further, before the joining process, the width A of the groove 8 and the outer diameter B1 of the heat medium tube 16 can be appropriately set within the range of B1 < A < 1.41 B1.

The cover member 10, as shown in Figs. 10 and 11, is a member inserted into the recess 8, has a rectangular cross section, and has an upper surface 11, a lower surface 12, a side surface 13a, and a side surface 13b. The cover member 10 is composed of a base member 2 and an aluminum alloy of the same kind. As shown in Fig. 11b, in the present embodiment, the thickness F of the cover member 10 is larger than the depth C of the groove 8 by the sum of the thickness F and the outer diameter B1 of the heat medium tube 16.

Therefore, as shown in Fig. 11b, when the heat medium tube 16 and the cover member 10 are inserted into the recess 8, the lower surface 12 of the cover member 10 abuts against the heat medium tube 16, and the upper surface 11 of the cover member 10 is The protruding height 10a protrudes from the surface 3 of the base member 2.

Moreover, the upper surface 11 of the cover member 10 does not have to protrude from the surface 3 of the base member 2, and the upper surface 11 of the cover member 10 is flush with the surface 3 of the base member 2 when the cover member 10 is inserted into the recess 8.

Further, when the cover member 10 is inserted into the recess 8, the side faces 13a, 13b of the cover member 10 are in surface contact with the side walls 8a, 8b of the recess 8 or opposed to each other with a fine gap. This flat side surface side of the cover member 10 and the recess 13a of the side wall 8a 8 side is referred to hereinafter as the flat portion V _1. Further, the flat surface of the other side surface 13b of the cover member 10 and the side wall 8b of the other side of the recess is hereinafter referred to as a flat portion V ₂ . Further, the flat portion V ₁ and the flat portion V ₂ may be simply referred to as a flat portion V. Further, a space formed by the bottom portion 7 and the side walls 8a, 8b of the recess 8 and the lower surface 12 of the cover member 10 is referred to as a space portion P11.

The plasticized region W ₁ , as shown in Fig. 10, is a region in which the base member 2 and a part of the cover member 10 are plastically flowed and integrated while performing friction stir welding on the flat portions V ₁ and V ₂ . . In the present embodiment, the maximum width of the plasticized region W ₁ is formed larger than the width Wa of A (see FIG. 11a of) the groove 8 (the width of the surface 3).

In the present embodiment, the deepest portion of the plasticized region W1 is set to a height position of about 1/3 from the upper surface 11 of the cover member 10 to the thickness of the cover member 10, but the size of the plasticized region W1 ( The depth may be appropriately set according to the size of the cover member 10 and the size of the rotary tool to be described later. For example, the deepest portion of the plasticized region W1 is set to be about the thickness from the upper surface 11 of the cover member 10 to the thickness of the cover member 10. 2/3 to 1/3 of the position can be.

Next, a method of manufacturing the heat transfer plate 101 will be described using FIG. Fig. 12 is a left side cross-sectional view showing a method of manufacturing a heat transfer plate according to a fifth embodiment, Fig. 12a is a view showing a heat medium tube insertion process for inserting a heat medium tube, Fig. 12b is a cover member insertion process, and Fig. 12c is a view showing a joint. engineering.

The method for manufacturing a heat transfer plate according to the fifth embodiment includes a preparation process for forming the base member 2, a heat medium tube insertion process for inserting the heat medium tube 16 into the groove 8 formed in the base member 2, and inserting the cover member 10 into the concave portion. The lid member insertion process of the groove 8 and the joining process in which the joining rotary tool 20 is moved along the flat portion V to perform friction stir welding.

(preparation project)

First, referring to Fig. 11a, a groove 8 is formed in the slab member by, for example, end milling. Thereby, the base member 2 having the groove 8 opened to the surface 3 is formed. The groove 8 has a bottom portion 7 formed by a curved surface at the lower portion, and is opened upward from the bottom portion 7 with a predetermined width.

Further, although the base member 2 is formed by cutting in the present embodiment, an extruded material of an aluminum alloy may be used.

(heat media tube insertion project)

Next, as shown in Fig. 12a, the heat medium tube 16 is inserted into the recess 8. The lower end of the heat medium tube 16 is in contact with the bottom 7 of the recess 8.

(cover member insertion project)

Next, as shown in Fig. 12b, the cover member 10 is inserted into the recess 8 of the base member 2. At this time, while the lower surface 12 of the cover member 10 abuts against the upper end of the heat medium tube 16, the upper surface 11 of the cover member 10 protrudes from the surface 3 of the base member 2. Further, the side surface of the side wall 8a of the recess 8, 8b of the cover member 10 is 13a, 13b is formed the flat portions V _1, V _2.

(joining engineering)

Subsequently, as shown in FIG. 12c first, using the rotary tool 20 for engaging the flat portion V (butt portions V _1, V ₂₎ friction stir. That is, after the center of the joining rotary tool 20 is engaged with the center of the groove 8 in the width direction, the lower surface 24 of the shoulder portion 22 of the joining rotary tool 20 is pressed into the surface 3 of the base member 2 at a predetermined depth, along The flat portion V is relatively moved. In the present embodiment, the number of revolutions of the joining rotary tool 20 is, for example, 50 to 1,500 rpm, the conveying speed is 0.05 to 2 m/min, and the pressing force applied to the joining rotary tool 20 in the axial direction is set to 1 kN to 20 kN.

According to the joining process, since the pressing force of the joining rotary tool 20 is transmitted to the heat medium tube 16 via the cover member 10, the heat medium tube 16 is plastically deformed along the shape of the groove 8 and the lower surface 12 of the cover member 10.

As shown on FIG. 10b, by the engagement surface of the base member 2 works 3 forming the plasticized region W _1. In the present embodiment, the set pressing amount length and joining rotary tool stirring pin 26 20, so that the plasticized region W deepest portion ₁ from the upper surface of the cover member 11 of approximately the thickness dimension of the member 10 reaches the cover 1/3 height position. Further, as shown in FIG. 12c first, by setting the depth of the butt portion V Wb _1, V ₂ of the plasticized region W ₁ is larger, can be improved lid member 2 and the bonding force of the base member 10.

Further, in the joining process of the present embodiment, the height B2 of the heat medium tube 16 after the joining process is formed to be about 70% of the height B1 of the heat medium tube 16 before the joining process. The height B2 of the heat medium tube 16 after the joining process is preferably 70% or more of the height B1 of the heat medium tube 16 before joining. Further, the height B2 of the heat medium tube 16 after the joining process is preferably 80% or more of the height B1 of the heat medium tube 16 before joining. Further, it is preferable that the value of the upsetting ratio (B1 - B2 / B1) × 100 indicating the collapse of the heat medium tube 16 is 20% to 30%.

Further, the size (depth) of the plasticized region W1, the shape of the joining rotary tool 20, the number of revolutions, the amount of press, and the like are merely exemplified, but are not limited thereto, and the materials of the base member 2 and the cover member 10 are appropriately considered. The settings can be. For example, in the present embodiment, the length LA of the stirring pin 26 of the joining rotary tool 20 is approximately 1/2 of the outer diameter X ₁ of the shoulder portion 22, but the length LA of the stirring pin 26 of the joining rotary tool 20 It may also be formed smaller than 1/2 of the outer diameter X ₁ of the shoulder portion 22. Thereby, the transmission efficiency of the pressing force of the joining rotary tool 20 can be improved.

As described above, in the joining process of the method for manufacturing a heat transfer plate according to the present embodiment, the outer diameter X ₁ of the shoulder portion 22 of the joining rotary tool 20 is set to be larger than the width A of the cover groove 6, along the cover member. center in the width direction 10 of the joining rotary tool 20 moves only once, while the friction stir butt portions V _1, V _2, the base member 2 by friction stir welding and the cover member 10 are integrated. Thereby, the operation procedures of the manufacturing process can be reduced.

Since the outer diameter X ₁ of the shoulder portion 22 of the joining rotary tool 20 is larger than the width A of the groove 8, the joining rotary tool 20 is placed in a state of being placed above the heat medium tube 16 to perform friction stir. Thereby, the heat medium tube 16 is effectively plastically deformed along the shape of the groove 8 and the lower surface 12 of the cover member 10, and the adhesion between the groove 8 and the heat medium tube 16 can be improved.

Further, in the present embodiment, since the center of the cover member 10 and the joining rotary tool 20 is located on the lead line passing through the center of the heat medium tube 16, the pressing force of the joining rotary tool 20 can be efficiently transmitted to the heat medium tube. At the same time, the heat medium tube 16 can be made to have a good plastic deformation.

Here, Fig. 13a is a cross-sectional view of the cover member insertion process, Fig. 3b is a cross-sectional view showing an excessively pressed state in the joining process, and Fig. 13c is a cross-sectional view at the time of completion of the fifth embodiment.

As shown in Fig. 13a, the inner circumference N2 (thick line portion) of the region surrounded by the bottom portion 7, the side wall 8a, the side wall 8b, and the lower surface 12 of the cover member 10 at the time of the cover member insertion process The length) is formed larger than the outer circumference N1 of the heat medium tube 16.

As shown in Fig. 13b, in the joining process, when the pressing amount of the cover member 10 is exceeded, the inner circumference N2 (thick line) of the vertical section of the groove 8 and the lower surface 12 of the cover member 10 is formed. The length of the portion is smaller than the outer circumference N1 of the heat medium tube 16. Moreover, the height B3 of the heat medium tube 16 after the joining process at the time of press-fitting is smaller than the height B2 (refer to FIG. 12c).

Thereby, the heat medium tube 16 is concavely deformed inward, and the space portion P12 can be formed between the heat medium tube 16 and the lower surface 12 of the cover member 10. As described above, when there is a gap between the heat medium tube 16 and the recess 8 and the lower surface 12 of the cover member 10, the heat transfer efficiency of the heat transfer plate 101 is lowered, which is not preferable.

On the other hand, as shown in Fig. 13c, when the present embodiment is completed, the inner circumferential length N2 (the length of the thick line portion) is substantially equal to the outer circumferential length N1 of the heat medium tube 16. In other words, the outer circumferential length N1 of the heat medium tube 16 and the inner circumferential length N2 of the region surrounded by the groove 8 and the lower surface 12 of the cover member 10 are similar, and the smaller the space portion P1 (see FIG. 13a), the smaller the space portion P1 can be. The heat transfer efficiency of the heat transfer plate 101 is improved.

Further, the manufacturing process of the present embodiment is merely an example, and the other processes are also the same. For example, referring to Fig. 12b, a thermally conductive substance can be filled in the space portion P11 formed between the heat medium tube 16 and the lower surface 12 of the cover member 10 before the cover member is inserted into the work. By filling the thermally conductive material, the gap after completion is reduced, and the heat transfer efficiency can be improved.

Further, the heat conductive material may be a low melting point solder material of a known metal powder, for example, a metal powder, a metal powder paste or a metal sheet may be used as long as it is a material for improving heat transfer efficiency.

[Sixth embodiment]

Next, a method of manufacturing a heat transfer plate and a heat transfer plate according to a sixth embodiment of the present invention will be described. The heat transfer plate 91 and the heat transfer plate manufacturing method according to the sixth embodiment are different from the fifth embodiment in that the cover groove 471 and the groove 473 are provided as shown in Figs. 14 and 15 . Further, the description of the portions common to the fifth embodiment will be omitted.

As shown in Fig. 14a, a cover groove 471 is recessed in the surface 483 of the base member 482, and a groove 473 narrower than the cover groove 471 is recessed in the center of the cover groove 471. The cover groove 471 is a portion where the cover member 460 is disposed, and is formed continuously along the longitudinal direction of the base member 482. The cover groove 471 has a rectangular cross section and is provided with side walls 471a and 471b which are vertically erected from the bottom surface of the cover groove 471. The width E1 of the cover groove 471 is formed to be substantially the same as the width G1 of the cover member 460 to be described later, and the depth j of the cover groove 471 is formed to be substantially the same as the depth f1 of the cover member 460.

The groove 473 is a portion into which the heat medium tube 16 and the lid member 460 are inserted, and is continuously formed across the longitudinal direction of the base member 482. The groove 473 is a U-shaped groove having an open upper cross section, and a bottom portion 474 having a semicircular cross section is formed at the lower end. Further, the side walls 473a, 473b are continuously formed from the bottom portion 474. The width e1 of the groove 473 is formed larger than the outer diameter B1 of the heat medium tube 16. Further, the curvature of the bottom portion 474 is formed to be smaller than the curvature of the outer circumference of the heat medium tube 16.

The heat medium tube 16, as shown in Fig. 14, has a circular cross section before the joining process, but as shown in Fig. 15, it is pressed by the joining work, along the groove 473 and the cover member 460. The shape of the surface 465 is plastically deformed. The state of collapse of the heat medium tube 16 will be described later.

The cover member 460, as shown in Fig. 14a, is a member having a T-shaped side surface inserted into the cover groove 471 and the recess 473, and has a wide portion 461 having a large width and a narrow portion 462 narrower than the wide portion 461. . The wide portion 461 has an upper surface 463, a lower surface 464, and side surfaces 463a, 463b. The width G1 of the wide portion 461 is formed to be substantially the same as the width E1 of the cover groove 471, and the thickness f1 is formed to be substantially the same as the depth j of the cover groove 471.

The narrow portion 462 extends downward from the center of the lower surface 464 of the wide portion 461. The narrow portion 462 has sides 462a, 462b and a lower surface 465. The lower surface 465 is formed into a concave curved surface. The curvature of the lower surface 465 is formed to be smaller than the curvature of the outer circumference of the heat medium tube 16. The width g1 of the narrow portion 462 is formed to be substantially equal to the width e1 of the groove 473. The thickness f2 of the narrow portion 462 is formed such that the sum of the thickness f2 and the outer diameter B1 of the heat medium tube 16 is larger than the depth c of the groove 473.

As shown in FIG. 14b, when the heat medium tube 16 and the cover member 460 are inserted into the cover groove 471 and the recess 473, the lower surface 465 of the narrow portion 462 of the cover member 460 abuts against the heat medium tube 16, and the cover The upper surface 463 of the member 460 protrudes from the surface 483 of the base member 482 at a protruding height 460a. Further, the bottom surface 472 of the cover groove 471 is separated from the wide portion 461 of the cover member 460 by the separation surface L1 by a separation distance L1. The protruding height 460a is formed to be substantially equal in length to the separation distance L1.

Further, when the cover member 460 is inserted into the cover groove 471 and the recess 473, the side faces 463a, 463b of the wide portion 461 of the cover member 460 are in surface contact with the side walls 471a, 471b of the recess 471 or face each other with a slight gap. Here, the flat surface of the side surface 463a of one side of the wide portion 461 of the lid member 460 and the side wall 471a of one side of the groove 471 is hereinafter referred to as a flat portion V ₃ . Side and the other side of the cover member side wall 460 of the groove 463b on the other side of the flat surface 471 butt 471b is hereinafter referred to as portion V _4. Further, the flat portion V ₃ and the flat portion V ₄ are also simply referred to as a flat portion V. Further, a space formed by the bottom portion 474 of the groove 473 and the side walls 473a, 473b and the lower surface 465 of the cover member 460 is referred to as a space portion P13.

The plasticized region W ₂ , as shown in FIG. 15 b , is a plasticized flow of the base member 482 and the cover member 460 when the friction stir welding is performed on the flat portions V ₃ and V ₄ . region. In the present embodiment, the maximum width Wa of the plasticized region W ₂ (the width of the surface 483) is formed larger than the width E1 of the cover groove 471 (see FIG. 14a).

Next, a method of manufacturing the heat transfer plate 491 will be described using FIG.

The method for manufacturing a heat transfer plate according to the sixth embodiment includes a preparation process for forming the base member 482, a heat medium tube insertion process for inserting the heat medium tube 16 into the groove 473 formed in the base member 482, and a cover member 460 inserted into the cover. The cover member of the groove 471 and the groove 473 is inserted into the project, and the joining rotary tool 20 is moved along the flat portion V to perform the friction stir welding. Moreover, the preparation process is roughly equal to the fifth embodiment.

(heat media tube insertion project)

In the heat medium tube insertion process, the heat medium tube 16 is inserted into the groove 473 with reference to Figs. 14a and 14b. The lower end of the heat medium tube 16 is in contact with the bottom 474 of the recess 473.

(cover member insertion project)

Next, as shown in Fig. 14b, the cover member 460 is inserted into the cover groove 471 and the recess 473 of the base member 482. At this time, while the lower surface 465 of the narrow portion 462 of the cover member 460 abuts against the upper end of the heat medium tube 16, the upper surface 463 of the cover member 460 protrudes from the surface 483 of the base member 482.

(joining engineering)

Subsequently, as shown in FIG. 15b of using the rotary tool 20 for engaging the flat portion V (butt portions V _3, V ₄₎ for friction stirring. That is, after the center of the joining rotary tool 20 is engaged with the center of the cover groove 471 in the width direction, the lower surface 24 of the shoulder portion 22 of the joining rotary tool 20 is pressed into the surface 483 of the base member 482 to a predetermined depth, along The flat portion V is relatively moved.

According to the joining process, since the pressing force of the joining rotary tool 20 is transmitted to the heat medium tube 16 via the cover member 460, the heat medium tube 16 is formed along the bottom portion 474 of the groove 473 and the lower surface 465 of the cover member 460. Plastic deformation. The height B4 of the heat medium tube 16 after the joining process is pressed by about 80% of the outer diameter B1 of the heat medium tube 16 before the joining process.

In the method of manufacturing the heat transfer plate of the present embodiment as described above, since the outer diameter X ₁ of the shoulder portion 22 of the joining rotary tool 20 is larger than the width E1 of the cover groove 471, the joining rotary tool 20 can be moved once. At the same time, the pair of flat portions V ₃ , V ₄ of the cover member 460 and the base member 482 are friction stir. Thereby, the procedure of the manufacturing process can be reduced.

In addition, since the outer diameter X1 of the shoulder portion 22 of the joining rotary tool 20 is larger than the width E1 of the groove 473, friction welding is performed in a state where the joining rotary tool 20 is positioned above the heat medium tube 16. Thereby, the heat medium tube 16 is effectively plastically deformed along the shape of the groove 473 and the lower surface 465 of the cover member 460, and the adhesion between the groove 473 and the heat medium tube 16 can be improved.

Further, in the present embodiment, since the center of the cover member 460 and the joining rotary tool 20 is located on the lead line passing through the center of the heat medium tube 16, the pressing force of the joining rotary tool 20 can be more efficiently transmitted to the heat medium tube. At the same time, the heat medium tube 16 can be plastically deformed in a balanced manner.

Further, in the present embodiment, since the lower surface 465 (lower portion) of the cover member 460 is a curved surface, the heat medium tube 16 having a circular cross section is easily deformed along the lower surface 465, and the space portion P13 can be effectively changed. small.

That is, as shown in Fig. 16, when the present embodiment is completed, the inner circumference N2 (the thick line portion of Fig. 16) of the region formed by the groove 473 and the lower surface 465 of the cover member 460 and the tube for the heat medium are as shown in Fig. The outer circumference N1 of 16 is formed to be substantially equal. Thereby, the degree of adhesion between the heat medium tube 16 and the base member 482 can be improved.

Further, the heat transfer plate 491 of the present embodiment has a cover groove 471 having a large width and a groove 473 having a small width, and the cover member 460 also has a wide portion 461 and a narrow portion 462. Therefore, as shown in Fig. 15a, when the joining rotary tool 20 is pressed from above the cover member 460 in the joining process, the lower surface (lower portion) 464 of the wide portion 461 of the cover member 460 abuts against the cover groove 471. Bottom surface 472. Thereby, since the cover member 460 is not pushed under the bottom surface 472, the heat medium tube 16 can be prevented from being excessively deformed. That is, by appropriately setting the depth j of the cover groove 471 and the thickness f1 of the wide portion 461 of the cover member 460, the upsetting ratio of the heat medium tube 16 can be easily set.

[Seventh embodiment]

Next, a method of manufacturing the heat transfer plate and the heat transfer plate according to the seventh embodiment of the present invention will be described. In the heat transfer plate according to the seventh embodiment, as shown in Figs. 17a and 17b, the outer diameter B1 of the heat medium tube 16 before the joining process is larger than the depth c2 of the groove 148, which is different from the sixth embodiment. First, the configuration of the heat transfer plate 151 shown in Fig. 18d will be described.

As shown in Fig. 17a, a cover groove 146 is recessed in the surface 143 of the base member 142, and a groove 148 narrower than the cover groove 146 is recessed in the center of the bottom surface 146a of the cover groove 146. The cover groove 146 is a portion in which the cover member 130 is disposed, and is formed continuously across the longitudinal direction of the base member 142. The cover groove 146 has a rectangular cross section and is provided with side walls 145a, 145b which are vertically erected from the bottom surface 146a of the cover groove 146. The width E2 of the cover groove 146 is formed to be substantially equal to the width g2 of the cover member 130 to be described later, and the depth j2 of the cover groove 146 is substantially equal to the depth f3 of the cover member 130.

The groove 148 is a portion into which the heat medium tube 16 is inserted, and is continuously formed across the longitudinal direction of the base member 142. The groove 148 is a U-shaped groove having a cross section opened upward, and a bottom portion 147 having a predetermined curvature is formed at the lower end. The width A2 of the opening of the groove 148 is formed larger than the outer diameter B1 of the heat medium tube 16.

The heat medium tube 16, as shown in Fig. 17a, has a circular cross section prior to the joining process, as shown in Fig. 18c, pressed by the joining process along the recess 148 and the lower surface 132 of the cover member 130. The shape is plastically deformed. The case of the collapse of the heat medium tube 16 will be described later.

The cover member 130, as shown in Fig. 17a, is a member inserted into the cover groove 146 and has a rectangular cross section, and has an upper surface 131, a lower surface 132, a side surface 133a, and a side surface 133b. The cover member 130 is composed of a base member 142 of the same type of aluminum alloy. The thickness f3 of the cover member 130 is formed to be the same as the depth j2 of the cover groove 146 in the present embodiment.

Therefore, as shown in Fig. 17b, when the heat medium tube 16 is inserted into the recess 148 and the cover member 130 is inserted into the cover groove 146, the lower surface 132 of the cover member 130 abuts against the heat medium tube 16, and the cover The upper surface 131 of the member 130 protrudes from the surface 143 of the base member 142 at a protruding height 130a.

Moreover, the upper surface 131 of the cover member 130 does not necessarily need to protrude from the surface 143 of the base member 142, and the upper surface 131 of the cover member 130 is flush with the surface 143 of the base member 142 when the cover member 130 is inserted into the cover groove 146.

Further, when the cover member 130 is inserted into the cover groove 146, the side faces 133a, 133b of the cover member 130 are in surface contact with the side walls 145a, 145b of the cover groove 146 or are disposed to face each other with a fine gap. Thereto, while the side of the cover member 130 and the cover 133a of the groove side wall 145a 146 of the flat planar surface portion hereinafter referred to as V _5. And, the other flat side surface 133b side wall 145b and the cover side groove 146 of the cover member 130 flat contact portion hereinafter referred to as V _6. Further, the flat portion V ₅ and the flat portion V ₆ are also referred to as a flat portion V. Further, a space formed by the recess 148, the heat medium tube 16, the cover groove 146, and the lower surface 132 of the cover member 130 is referred to as a space portion P4.

The plasticized region W ₃ , as shown in Fig. 18d, is a region in which the base member 142 and a part of the cover member 130 are plastically flowed and integrated while frictionally joining the flat portions V ₅ and V ₆ . . In the present embodiment, the plasticized region W is the maximum width Wa ₃ (the width of the surface 143) is formed larger than the width of the lid groove 146 E2 (refer to 17a of FIG.).

Next, a method of manufacturing the heat transfer plate 151 will be described using FIG.

The method for manufacturing a heat transfer plate according to the seventh embodiment includes a preparation process for forming the base member 142, a heat medium tube insertion process for inserting the heat medium tube 16 into the groove 148 formed in the base member 142, and inserting the cover member 130 into the cover. The cover member of the groove 146 is inserted into the project, and the joining rotary tool 20 is moved along the protruding portion V to perform a friction stir welding engagement process.

(preparation project)

First, as shown in Fig. 18a, a groove 148 is formed in the center of the bottom surface 146a of the cover groove 146 after the cover groove 146 is formed on the thick plate member, for example, by end milling.

Further, although the base member 142 is formed by cutting in the present embodiment, an extruded shape of an aluminum alloy may be used.

(heat media tube insertion project)

Next, as shown in Fig. 18a, the heat medium tube 16 is inserted into the recess 148. The lower end of the heat medium tube 16 is in contact with the bottom 147 of the recess 148.

(cover member insertion project)

Next, as shown in Fig. 18b, the cover member 130 is inserted into the cover groove 146 of the base member 142. At this time, while the lower surface 132 of the cover member 130 abuts against the upper end of the heat medium tube 16, the upper surface 131 of the cover member 130 protrudes from the surface 143 of the base member 142. Also, the sidewall of the cap 146 of the groove 145a, 145b and the side surface 130 of the cover member 133a, 133b are formed flat portions V _5, V _6.

(joining engineering)

Next, as shown in Fig. 18c, the joint portion V (the flat portions V ₅ and V ₆ ) is friction stir using the joining rotary tool 20 . That is, after the center of the joining rotary tool 20 is engaged with the center of the cover groove 146 in the width direction, the lower surface 24 of the shoulder portion 22 of the joining rotary tool 20 is pressed into the surface 143 of the base member 142 at a predetermined depth, along The flat portion V is relatively moved. Further, the length L _B of the stirring pin 26 of the joining rotary tool 20 of the present embodiment forms about 1/5 of the outer diameter X ₁ of the shoulder portion 22. By forming the length L _B of the stirring pin 26 small with respect to the outer diameter X _{1 of the} shoulder portion 22, the pressing force of the joining rotary tool 20 can be efficiently transmitted to the cover member 130.

According to the joining process, since the pressing force of the joining rotary tool 20 is transmitted to the heat medium tube 16 via the cover member 130, the heat medium tube 16 is plastically deformed along the shape of the groove 148 and the lower surface 132 of the cover member 130. The height B5 of the heat medium tube 16 after the joining process is pressed to be about 70% of the outer diameter B1 of the heat medium tube 16 before the joining process.

As described above, in the method of manufacturing the heat transfer plate of the present embodiment, the outer diameter X ₁ of the shoulder portion 22 of the joining rotary tool 20 is larger than the width E2 of the cover groove 146, and the joining rotary tool 20 moves once. At the same time, the pair of flat portions V ₅ and V ₆ of the base member 142 are friction stir. Thereby, the operating procedures of the manufacturing process can be reduced.

Since the outer diameter X ₁ of the shoulder portion 22 of the joining rotary tool 20 is larger than the width E2 of the cover groove 146, friction stir can be performed in a state where the joining rotary tool 20 is positioned above the heat medium tube 16. Thereby, the heat medium tube 16 is effectively plastically deformed along the shape of the groove 148 and the lower surface 132 of the cover member 130, and the adhesion between the groove 148 and the heat medium tube 16 can be improved.

Further, in the present embodiment, since the center of the cover member 130 and the joining rotary tool 20 is located on the lead line passing through the center of the heat medium tube 16, the pressing force of the joining rotary tool 20 can be more efficiently transmitted to the heat medium tube. At the same time, the heat medium tube 16 can be plastically deformed in a balanced manner.

That is, as shown in Fig. 19, when the present embodiment is completed, the inner circumference N2 of the region formed by the groove 148 and the lower surface 132 of the lid member 130 (the thick line portion of Fig. 19) and the tube for the heat medium are formed. The outer circumference N1 of 16 is formed to be substantially equal. Thereby, the degree of adhesion between the heat medium tube 16 and the base member 142 can be improved.

Further, in the present embodiment, the lower surface 132 of the cover member 130 abuts against the bottom surface 146a of the cover groove 146 during the joining process. Thereby, since the cover member 130 is not pushed under the bottom surface 146a of the cover groove 146, the heat medium tube 16 can be prevented from being excessively deformed. That is, by appropriately setting the depth j2 of the lid groove 146, the thickness f3 of the lid member 130, the depth c2 of the groove 148, and the outer diameter B of the heat medium tube 16, the upsetting ratio of the heat medium tube 16 can be easily set. .

[Eighth Embodiment]

Next, a heat transfer plate of the eighth embodiment will be described. The heat transfer plate 201 of the eighth embodiment shown in Fig. 20 includes a heat transfer plate 101 (see Fig. 10) which is substantially equal to the fifth embodiment, and the upper cover member 210 is disposed above the cover member 10 to perform friction. The feature of joining by stirring and joining is different from that of the fifth embodiment.

Further, the same structure as the heat transfer plate 101 described above is hereinafter referred to as a lower cover portion m. The members that are the same as those of the heat transfer plate 101 of the fifth embodiment are denoted by the same reference numerals, and the description thereof will not be repeated.

The heat transfer plate 201 has a base member 202, a heat medium tube 16 inserted into the groove 8, a cover member 10, and an upper cover member 210 disposed on the surface side of the cover member 10, as shown in Figs. 20a and 20b, and a plasticized region. W ₁ and the plasticized regions W ₄ and W ₅ are integrated by friction stir welding.

The base member 202, as shown in Fig. 20a, is composed of, for example, an aluminum alloy, and is made of, for example, an aluminum alloy. On the surface 203 of the base member 202, an upper cover groove 206 formed across the longitudinal direction and a bottom surface 206c of the upper cover groove 206 are formed. A groove 8 continuously formed across the length direction. The upper cover groove 206 has a rectangular cross section and is provided with side walls 206a, 206b which are vertically erected from the bottom surface 206c. The width of the upper cover groove 206 is formed to be larger than the width of the groove 8.

As shown on FIG. 20a, in the groove formed in the lower member 202 of the base 8, by inserting the heat medium pipe 16, closed by the cover member 10, by friction engagement in the plasticized region W ₁ stir welding. That is, the lower cover portion m formed inside the base member 202 is substantially the same as the heat transfer plate 101 of the fifth embodiment.

Further, a step (groove) or a burr may be generated by the friction stir welding on the bottom surface 206c of the upper cover groove 206. Thus, preferably the surface of the plasticized region W _1, for example, as a reference bottom surface 206 of the upper lid groove 206c cutting machining embodiment a smooth surface shape. Thereby, the lower surface 212 of the upper cover member 210 and the bottom surface 206c of the upper cover groove 206 after the surface cutting can be disposed without a gap.

As shown in Fig. 20a, the upper cover member 210 is made of, for example, an aluminum alloy, and has a rectangular cross section which is substantially the same as the cross section of the upper cover groove 206, and has a side surface 213a and a side surface 213b which are formed vertically from the lower surface 212. The upper cover member 210 is inserted into the upper cover groove 206. That is, the side faces 213a, 213b of the upper cover member 210 are in surface contact with the side walls 206a, 206b of the upper cover groove 206 or are arranged with a fine gap. Thereto, as shown in FIG. 20b of the side surface 213a and the flat side surface of the side wall 206a is hereinafter referred to as the upper side of the flat portion V _7. Further, the other side of the side surface 213b and the flat surface 206b of the other side of the sidewall of the upper flat portion referred to V _8. The upper flat portions V ₇ and V _{8 are} integrated in the plasticized regions W ₄ and W ₅ by friction stir welding.

The manufacturing method of the heat transfer plate 201 is the same as the heat transfer plate 101 of the fifth embodiment described above, and includes the surface cutting of the bottom surface 206c of the upper cover groove 206 after the lower cover portion m is formed in the lower portion of the base member 202. Engineering cutting surface disposed upper lid member 210 is inserted into the upper cover member projects, V ₇ along the upper flat portion, V ₈ embodiment the upper lid member engaging the friction stir welding engineering.

(face cutting engineering)

In the surface cutting process, the step (groove) and the burr formed on the bottom surface 206c of the upper cover groove 206 are removed by cutting, and the bottom surface 206c is smoothed.

(Upper cover member insertion project)

In the upper cover member insertion process, the upper cover member 210 is disposed on the bottom surface of the upper cover groove 206. By performing the surface cutting process, the lower surface 212 of the upper cover member 210 and the bottom surface of the upper cover groove 206 are disposed without a gap.

(Upper cover member joining project)

In the upper cover member joining process, after the surface cutting process, the joining rotary tool (not shown) is moved along the upper flat portions V ₇ and V ₈ to perform friction stir welding. The amount of pressing of the joining rotary tool in the upper cover member joining process is appropriately set in consideration of the length of the stirring pin of the joining rotary tool and the thickness of the upper cover member 210. In the joining operation of the upper cover member, the joining rotary tool 20 used in the fifth embodiment can be used.

According to the heat transfer plate 201 of the eighth embodiment, the upper cover member 210 is provided above the lower cover m, and the heat medium tube 16 is placed at a deeper position by friction stir welding.

Further, in the eighth embodiment, the two plasticized regions W ₄ and W ₅ are formed by frictionally stirring both side faces of the upper cover member 210, but the invention is not limited thereto. For example, the width of the upper cover groove 206 is smaller than the outer diameter X ₁ of the shoulder portion 22 of the joining rotary tool 20 (see FIG. 11a), and the upper cover member 210 is frictionally agitated by the joining rotary tool 20. Thereby, the working procedure of the joining project can be reduced.

[Ninth Embodiment]

Next, a heat transfer plate of a ninth embodiment will be described. The heat transfer plate 301 of the ninth embodiment shown in Fig. 21 has a structure substantially the same as that of the heat transfer plate 151 (see Fig. 18d) of the seventh embodiment, and the upper cover member 310 is disposed on the surface side of the cover member 130. The feature of performing friction stir welding and joining is different from that of the eighth embodiment.

Further, the same structure as the above-described heat transfer plate 151 is hereinafter referred to as a lower cover portion m'. The members that are the same as those of the heat transfer plate 151 of the fifth embodiment are denoted by the same reference numerals, and the description thereof will not be repeated.

As shown in Fig. 21, the heat transfer plate 301 has a base member 302, a heat medium tube 16 inserted into the recess 148, a cover member 130 inserted into the cover groove 146, and an upper cover member 310 disposed on the surface side of the cover member 130. The plasticized region W ₃ and the plasticized regions W ₆ and W ₇ are integrated by friction stir welding.

The base member 302, as shown in Fig. 21a, is made of, for example, an aluminum alloy, and has an upper cover groove 306 formed on the surface 303 of the base member 302 across the longitudinal direction, and a bottom surface 306c of the upper cover groove 306 extending continuously across the length direction. A cover groove 146 is formed, and a groove 148 continuously formed across the longitudinal direction of the bottom surface of the cover groove 146. The upper cover groove 306 has a rectangular cross section and is provided with side walls 306a, 306b which are vertically erected from the bottom surface 306c. The width of the upper cover groove 306 is formed to be larger than the width of the cover groove 146.

As shown in Fig. 21a, while the heat medium tube 16 is inserted into the recess 148 formed in the lower portion of the base member 302, the cover member 130 is inserted into the cover groove 146, and joined in the plasticized region W3 by friction stir welding. That is, the lower cover portion m' formed inside the base member 302 is formed to be substantially equal to the heat transfer plate 151 of the seventh embodiment.

Moreover, on the bottom surface 306c of the upper cover groove 306, a step (groove) or a burr may occur due to friction stir welding. Thus, for example, to form a smooth surface of the plasticized region W ₃ as a reference, the bottom surface 306c of the groove 306 of the upper cover surface of the embodiment of machining. Thereby, the lower surface 312 of the upper cover member 310 and the bottom surface 306c of the upper cover groove 306 after the surface cutting are disposed without a gap.

As shown in FIG. 21a, the upper cover member 310 is formed of, for example, an aluminum alloy, and has a rectangular cross section which is substantially the same as the cross section of the upper cover groove 306, and has a side surface 313a and a side surface 313b which are perpendicularly formed from the lower surface 312. The upper cover member 310 is inserted into the upper cover groove 306. That is, the side faces 313a, 313b of the upper cover member 310 are in surface contact with the side walls 306a, 306b of the upper cover groove 306 or are provided with a fine gap. Thereto, as shown in FIG. 21b of the side surface 313a and the flat surface side of the side wall 306a side of the upper side of the flat portion V _9. Further, the other side of the side surface 313b and the flat surface of the other side of the side wall 306b of the upper side flat portion V _10. The upper flat portions V ₉ and V _{10 are} integrated in the plastic regions W ₆ and W ₇ by friction stir welding.

According to the heat transfer plate 301 of the ninth embodiment, the upper cover member 310 is disposed above the lower cover portion m', and the heat medium tube 16 is placed at a deeper position by friction stir welding. Further, since the manufacturing process of the heat transfer plate 301 is substantially equal to that of the eighth embodiment, it is omitted.

The embodiments of the present invention have been described above, but the present invention can be appropriately modified without departing from the scope of the present invention. For example, the bottom portion of the groove into which the heat medium tube 16 is inserted may have a curved surface as viewed in cross section, and the cross section may have a polygonal shape.

1, 81, 91, 101, 201, 151, 301. . . Heat transfer plate

2, 32, 62, 142, 202, 302. . . Base member

3, 483. . . surface

4. . . back

5a, 5b, 65a, 65b, 145a, 145b, 206a, 206b, 306a, 306b, 471a, 471b. . . Side wall

6, 36, 146, 471. . . Cover slot

6a, 36a, 66, 146a, 206c, 306c. . . Bottom

7, 37, 147. . . bottom

8. . . Groove

10, 50, 130, 460. . . Cover member

11, 43, 53, 131, 463. . . Upper surface

12, 44, 55, 72, 132, 212, 312, 464, 465. . . lower surface

13a, 13b, 54a, 54b, 73a, 73b, 313a, 313b, 463a, 463b. . . side

16. . . Thermal media tube

18. . . Hollow part

20. . . Joining rotary tool

twenty two. . . Shoulder

twenty four. . . below

25. . . Thermally conductive substance

26. . . Mixing pin

33, 63, 143, 203, 483. . . surface

38, 148, 473. . . Groove

41, 51, 461. . . Wide part

42, 52, 462. . . Narrow part

43a, 43b, 133a, 133b, 213a, 213b, 463a, 463b. . . side

56. . . Curve

64, 206, 306. . . Cover groove

70. . . Upper cover member

460a. . . Protruding height

F, f1, f2. . . thickness

J, j, c. . . depth

E, e, A, E1, G1. . . width

G, g1. . . width

L _A . . . length

L1. . . Separation distance

M, m’. . . Lower cover

P, P11, P13. . . Space department

X ₁ , X ₂ , B. . . Outer diameter

V, V ₁ , V ₂ , V ₃ , V ₄ , V ₉ , V ₁₀ . . . Flat joint

W, W ₁ , W ₂ , W ₃ , W ₄ , W ₅ , W ₆ , W ₇ . . . Plasticized area

Wa. . . Maximum width

Fig. 1 is a perspective view of a heat transfer plate according to the first embodiment.

Fig. 2a is a side view of the rotary tool of the first embodiment and an exploded side view of the heat transfer plate. Fig. 2b is a layout view of the heat transfer plate of the first embodiment.

Fig. 3 is a side view showing a method of manufacturing a heat transfer plate according to the first embodiment, Fig. 3a is a view showing a tube insertion process for a heat medium, Fig. 3b is a view showing a cover member insertion process, Fig. 3c is a view showing a joining process, and Fig. 3d is a view showing a joining process. Complete the diagram.

Fig. 4a is a side view of the rotary tool of the second embodiment and an exploded side view of the heat transfer plate, and Fig. 4b is a layout view of the heat transfer plate of the second embodiment.

Fig. 5 is a side view showing a method of manufacturing a heat transfer plate according to a second embodiment, wherein Fig. 5a shows a joining process, and Fig. 5b shows a completed view.

Fig. 6a is a side view of the rotary tool of the third embodiment and an exploded side view of the heat transfer plate, and Fig. 6b is a layout view of the heat transfer plate of the third embodiment.

Fig. 7 is a side view of the heat transfer plate of the third embodiment.

Fig. 8 is an exploded side view showing the heat transfer plate of the fourth embodiment.

Fig. 9 is a side view of the heat transfer plate of the fourth embodiment.

Fig. 10 is a view showing a heat transfer plate according to a fifth embodiment, and Fig. 10a is a perspective view, and Fig. 10b is a cross-sectional view taken along line X1-X1 of Fig. 10a.

Fig. 11a is a side view of the rotary tool of the fifth embodiment and an exploded side view of the heat transfer plate, and Fig. 11b is a layout view of the heat transfer plate of the fifth embodiment.

Fig. 12 is a side cross-sectional view showing a method of manufacturing a heat transfer plate according to a fifth embodiment, wherein Fig. 12a shows a tube insertion process for a heat medium, Fig. 12b shows a cover member insertion process, and Fig. 12c shows a joining process.

Fig. 13a is a cross-sectional view showing the cover member insertion process, Fig. 13b is a cross-sectional view showing a state in which the pressing force is exceeded in the joining process, and Fig. 13c is a cross-sectional view showing the completion of the fifth embodiment.

Fig. 14a is a side view of the rotary tool of the sixth embodiment and an exploded side view of the heat transfer plate. Fig. 14b is a layout view of the sixth embodiment.

Fig. 15 is a side cross-sectional view showing a method of manufacturing a heat transfer plate according to a sixth embodiment, wherein Fig. 15a shows a joining process, and Fig. 15b shows a completed view.

Figure 16 is a cross-sectional view showing the completion of the sixth embodiment.

Fig. 17a is a side view of the rotary tool of the seventh embodiment and an exploded side view of the heat transfer plate, and Fig. 17b is a layout view of the seventh embodiment.

Fig. 18 is a side cross-sectional view showing the manufacturing method of the seventh embodiment, Fig. 18a showing a tube insertion process for a heat medium, Fig. 18b showing a cover member insertion process, Fig. 18c showing a joining process, and Fig. 18d showing a completed view.

Fig. 19 is a cross-sectional view showing the completion of the seventh embodiment.

Fig. 20a is an exploded side view of the heat transfer plate of the eighth embodiment, and Fig. 20b is a side cross-sectional view of the heat transfer plate of the eighth embodiment.

Fig. 21a is an exploded side view of the heat transfer plate of the ninth embodiment, and Fig. 21b is a side cross-sectional view of the heat transfer plate of the ninth embodiment.

Figures 22a, 22b are side views of a conventional heat transfer plate.

1. . . Heat transfer plate

2. . . Base member

3. . . surface

4. . . back

6. . . Cover slot

8. . . Groove

10. . . Cover member

16. . . Thermal media tube

25. . . Thermally conductive substance

V ₁ , V ₂ . . . Flat joint

W ₁ . . . Plasticized area

Wa. . . Maximum width

Claims (36)

A method for manufacturing a heat transfer plate, comprising: a tube insertion process for a heat medium, inserting a tube for a heat medium into a groove formed in a bottom portion of a cover groove opening on a surface side of the base member; Inserting a cover member into the cover groove, abutting the cover member against a bottom surface of the cover groove; and engaging a project to move the rotary tool relative to a flat portion of the cover groove facing the side surface of the cover member And performing friction stir, wherein an outer diameter of a shoulder of the rotary tool is larger than a width of the opening of the cover groove, and a distance from a bottom of the groove to a lower portion of the cover member is set to be higher than that of the heat medium tube In the above-described joining process, in the state in which the heat medium tube is not plastically deformed, the rotating tool is moved once, and the side wall of the cover groove and the side surface of one side of the cover member are overlapped. And the side wall of the other side of the cover groove and the flat portion of the side surface of the other side of the cover member are simultaneously friction stir. The method for manufacturing a heat transfer plate according to claim 1, further comprising a filling process, wherein the groove and the space surrounded by the outer peripheral surface of the heat medium tube are filled in the space before the cover member is inserted into the project. Thermally conductive substance. The method for producing a heat transfer plate according to claim 2, wherein the heat conductive material is a metal powder, a metal powder paste or a metal sheet. The method for producing a heat transfer plate according to claim 2, wherein the thermally conductive material is a low melting point welding material. The method for manufacturing a heat transfer plate according to claim 1, The maximum diameter of the stirring pin of the rotary tool is set to be larger than the width of the cover groove. The method of manufacturing a heat transfer plate according to claim 1, wherein a minimum diameter of the stirring pin of the rotary tool is set to be larger than a width of the cover groove. The method for manufacturing a heat transfer plate according to claim 1, wherein in the joining process, the deepest portion of the plasticized region formed by friction stir is set to descend from the upper surface of the cover member to the cover member The thickness of the size is 2/3 or more. The method for manufacturing a heat transfer plate according to claim 1, wherein in the joining process, the deepest portion of the plasticized region formed by friction stir is set to descend from the upper surface of the cover member to the cover member The thickness of the thickness is 1/2 or more. The method for manufacturing a heat transfer plate according to claim 1, wherein in the joining process, the deepest portion of the plasticized region formed by friction stir is set to descend from the upper surface of the cover member to the cover member The thickness of the thickness is more than 1/3 of the position. The method for manufacturing a heat transfer plate according to claim 1, further comprising: an upper cover member insertion process, wherein the upper cover member abuts against the cover groove on a surface side of the base member a bottom surface of the upper cover groove having a wide width; and an upper cover member engaging project for causing the rotary tool to move along the flat portion of the side wall of the upper cover groove and the side surface of the upper cover member Stir. A method of manufacturing a heat transfer plate, comprising: a heat transfer plate comprising a base member opening to a surface side and having a groove deeper than a height direction of a heat medium tube; and the heat medium inserted into the groove a tube, and a cover member covering the heat medium tube, the method for manufacturing the heat transfer plate comprising: a heat medium tube insertion process, inserting the heat medium tube into the groove; and a cover member insertion project, the cover member Inserting the above-mentioned heat medium tube; and engaging work, the flat portion of the groove facing the side surface of the cover member, the rotating tool is relatively moved to perform friction stir, wherein the shoulder of the rotary tool The outer diameter is larger than the width of the opening of the groove, and in the joining process, the pressing force of the rotary tool is transmitted to the heat medium tube via the cover member, and the heat medium tube is plastically deformed. a flat portion of a side wall of one side of the groove and a side surface of one side of the cover member, and a side wall of the other side of the groove and the cover member A side edge portion of the butt friction stir simultaneously. A method of manufacturing a heat transfer plate, comprising: a heat transfer plate having a cover groove opening on a surface side and a groove opening to a bottom surface of the cover groove and shallower than a vertical direction of the heat medium tube; a base member, the heat medium tube inserted into the groove, and a cover member covering the heat medium tube, the heat transfer plate manufacturing method comprising: a heat medium tube insertion process, and inserting the heat medium tube into the concave portion a cover member insertion process for inserting the cover member into the upper portion of the heat medium tube; and a joining process for moving the rotating tool relative to the flat portion of the side wall of the cover groove facing the side surface of the cover member Friction stir, wherein an outer diameter of a shoulder of the rotary tool is larger than a width of an opening of the cover groove, wherein in the joining process, a pressing force of the rotary tool is transmitted to the heat medium tube via the cover member, In a state in which the heat medium tube is plastically deformed, a flat portion of a side wall of the cover groove and a side surface of the cover member, and a side wall of the other side of the cover groove and a side surface of the other side of the cover member The part is simultaneously friction stir. The method of manufacturing a heat transfer plate according to claim 12, wherein in the joining process, the cover member is brought into contact with a bottom surface of the cover groove. A method of manufacturing a heat transfer plate, comprising: a heat transfer plate having a cover groove opening on a surface side and a groove opening to a bottom surface of the cover groove and deeper than a height of a heat medium tube in a vertical direction; a base member, the heat medium tube inserted into the groove, and a cover member having a wide portion inserted into the cover groove and a narrow portion inserted into the groove, the heat transfer plate manufacturing method comprising: a heat medium tube insertion process, Inserting the heat medium tube into the groove; inserting a cover member into the heat medium tube; and In the joining process, the flat portion of the cover groove facing the side surface of the cover member is frictionally agitated by relatively moving the rotary tool, wherein the outer diameter of the shoulder of the rotary tool is larger than the opening of the cover groove In the above-described joining process, the pressing force of the rotary tool is transmitted to the heat medium tube via the narrow portion of the cover member, and the heat medium tube is plastically deformed, and the cover groove side is The side wall is frictionally agitated simultaneously with the flat portion of the side surface of the cover member and the side wall of the other side of the cover groove and the flat portion of the other side surface of the cover member. The method of manufacturing a heat transfer plate according to claim 14, wherein in the joining process, the wide portion of the cover member is brought into contact with a bottom surface of the cover groove. The method for manufacturing a heat transfer plate according to claim 11, wherein the groove and the region surrounded by the cover member are vertically cross-sectioned in the joining process. The inner circumference is set to be longer than the outer circumference of the heat medium tube. The method of manufacturing a heat transfer plate according to claim 11, wherein in the joining process, the height of the heat medium tube after the joining process is set to be the heat medium before the joining process. Use 70% or more of the height of the tube. The method of manufacturing a heat transfer plate according to claim 11, wherein in the joining process, the height of the heat medium tube after the joining process is set to be the heat medium before the joining process. Use 80% or more of the height of the tube. The method for producing a heat transfer plate according to claim 11, wherein the lower portion of the cover member is formed along the shape of the heat medium tube and is in contact with the heat medium tube. The method for manufacturing a heat transfer plate according to claim 11, 12 or 14, further comprising a filling process, wherein the groove and the outer peripheral surface of the heat medium tube are surrounded before the cover member is inserted into the project The space is filled with a thermally conductive substance. The method for producing a heat transfer plate according to claim 20, wherein the thermally conductive material is a metal powder, a metal powder paste or a metal sheet. The method for producing a heat transfer plate according to claim 20, wherein the thermally conductive material is a low melting point welding material. The method of manufacturing a heat transfer plate according to claim 11, wherein a maximum diameter of the stirring pin of the rotary tool is set to be larger than a width of the groove. The method of manufacturing a heat transfer plate according to claim 11, wherein a minimum diameter of the stirring pin of the rotary tool is set to be larger than a width of the groove. The method of manufacturing a heat transfer plate according to claim 12, wherein the maximum diameter of the stirring pin of the rotary tool is set to be larger than a width of the cover groove. The method of manufacturing a heat transfer plate according to claim 12, wherein the minimum diameter of the stirring pin of the rotary tool is set to be larger than the width of the cover groove. The method for manufacturing a heat transfer plate according to claim 11, wherein the deepest portion of the plasticized region formed by friction stir is set to descend from the upper surface of the cover member in the jointing process. To a position of 2/3 or more of the thickness dimension of the cover member. The method for manufacturing a heat transfer plate according to claim 11, wherein the deepest portion of the plasticized region formed by friction stir is set to descend from the upper surface of the cover member in the jointing process. To a position of 1/2 or more of the thickness dimension of the cover member. The method for manufacturing a heat transfer plate according to claim 11, wherein the deepest portion of the plasticized region formed by friction stir is set to descend from the upper surface of the cover member in the jointing process. To a position of 1/3 or more of the thickness dimension of the cover member. The method for manufacturing a heat transfer plate according to claim 11, further comprising: an upper cover member insertion process, wherein the upper cover member abuts against the groove on the surface side of the base member The bottom surface of the upper cover groove having a wide width; and the upper cover member joining work, the friction tool is frictionally stirred along the flat portion of the side wall of the upper cover groove and the side surface of the upper cover member. The method for manufacturing a heat transfer plate according to claim 12, further comprising: an upper cover member insertion process, wherein the upper cover member abuts against the cover on the surface side of the base member The width of the groove is also wider than the bottom surface of the upper cover groove; And the upper cover member joining process, the rotating tool is frictionally stirred along the flat portion of the side wall of the upper cover groove and the side surface of the upper cover member. A heat transfer plate comprising: a base member having a groove opening on a surface side and deeper than a height direction of a heat medium tube; a heat medium tube inserted into a bottom of the groove; and a cover member Covering the heat medium tube in the groove, wherein the heat medium tube is plastically deformed by a pressing force generated by friction stir welding while the base member is friction stir welded with the cover member, wherein the groove is The width of the plasticized region of one of the side wall of the one side of the cover member and the side surface of the cover member and the side wall of the other side of the groove and the side surface of the other side of the cover member is larger than the above The width of the groove. The heat transfer plate of claim 32, further comprising a base member having an upper cover groove formed on a surface side of the base member and wider than the groove, and an upper cover member inserted into the upper cover groove, The frictional agitation is performed along a flat portion of the side wall of the upper cover groove and the side surface of the upper cover member. A heat transfer plate comprising: a base member having a recess opening in a bottom surface of the cover groove and shallower than a height of a heat medium tube in a vertical direction, the cover groove being open on a surface side; a heat medium tube inserted The above groove; a cover member covering the heat medium tube in the groove, wherein the heat medium tube is plastically deformed by a pressing force generated by friction stir welding while the base member is frictionally agitated and engaged with the cover member, wherein the heat medium tube is plastically deformed by a pressing force generated by friction stir welding, wherein a plasticized region formed by a flat portion of a side wall of the cover groove and a side surface of one side of the cover member, and a flat portion of a side wall of the other side of the cover groove and a side surface of the other side of the cover member The width is greater than the width of the cover groove. A heat transfer plate comprising: a base member having a recess opening in a bottom surface of the cover groove and deeper than a height direction of the heat medium tube, the cover groove opening on a surface side; a heat medium tube inserted The groove; and a cover member having a wide portion inserted into the cover groove and a narrow portion inserted into the groove, wherein the heat medium tube is friction stir welded while the base member is frictionally agitated and engaged with the cover member The generated pressing force is plastically deformed, wherein the flat portion of the side wall of one side of the cover groove and the side surface of the cover member and the side wall of the other side of the cover groove and the side surface of the other side of the cover member The width of the plasticized region of one of the portions is greater than the width of the cover groove. The heat transfer plate according to claim 35, further comprising a base member having an upper cover groove formed on a surface side of the base member and wider than the groove, and an upper cover member inserted into the upper cover groove, The frictional agitation is performed along a flat portion of the side wall of the upper cover groove and the side surface of the upper cover member.