JP2010089147A - Manufacturing method of heat transfer plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a heat transfer plate that includes high heat-exchange efficiency and is easily manufactured even if a heat medium pipe bent at least in part is included. <P>SOLUTION: The method includes: a preparatory step in which a first recessed groove 5 formed in a first metallic member 2 is superposed on a second recessed groove 6 formed in a second metallic member 3 and in which a heat medium pipe 4 is inserted in a space K formed between the recessed grooves mutually; and an inflow stirring step in which an inflow stirring rotary tool 25 is moved along the space K, wherein the inflow stirring rotary tool is inserted at least from one face of the front and the rear face of a temporary assembled structure U formed in the preparatory step, and in which a plastic fluidized material Q fluidized by a frictional heat is made to flow in voids P1-P4 formed around the heat medium pipe 4. The heat transfer plate is characterized in that at least either the width or the height of the space K is larger than the outer diameter of the heat medium pipe 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

  A heat transfer plate placed in contact with or close to an object to be heat exchanged, heated or cooled is inserted, for example, through a heat medium pipe that circulates a heat medium such as high-temperature liquid or cooling water through a thick metal member. Is formed.

As a method for manufacturing such a heat transfer plate, for example, a method described in Patent Document 1 is known. FIG. 13 is a view showing a heat transfer plate according to Patent Document 1, in which (a) is a perspective view and (b) is a cross-sectional view. A heat transfer plate 100 according to Patent Document 1 is inserted into a first metal member 102 having a cover groove 106 having a rectangular cross-sectional view opening on the surface and a groove 108 opening on the bottom surface of the cover groove 106, and the groove 108. A heat medium pipe 116 and a second metal member 110 fitted in the lid groove 106, and both side walls 105, 105 in the lid groove 106 and both side surfaces 113, 114 of the second metal member 110, respectively. Are formed by friction stir welding along the butt surfaces. Plasticized regions W ₀ and W ₀ are formed on the abutting surfaces of the lid groove 106 and the second metal member 110.

JP 2004-314115 A

  As shown in FIG. 13B, the heat transfer plate 100 has a gap 120 formed by the concave groove 108, the outer surface of the heat medium pipe 116, and the back surface of the second metal member 110. If the gap 120 is present inside the heat transfer plate 100, the heat radiated from the heat medium pipe 116 becomes difficult to be transmitted to the first metal member 102 and the second metal member 110. There was a problem that heat exchange efficiency fell. Therefore, it is preferable that the depth and width of the concave groove 108 be formed to be the same as the outer diameter of the heat medium pipe 116 so that the gap 120 is made smaller.

  On the other hand, when at least a part of the heat medium pipe 116 is curved and embedded in the first metal member 102 and the second metal member 110, the heat medium pipe 116 is inserted into the concave groove 108, and the lid groove 106. In this case, it is difficult to dispose the second metal member 110, so that the depth and width of the groove 108 must be ensured to be larger than the outer diameter of the heat medium pipe 116. That is, when at least a part of the heat medium tube 116 is curved and embedded in the first metal member 102 and the second metal member 110, the depth of the concave groove 108 is smaller than the outer diameter of the heat medium tube 116. The width must be increased, and the gap 120 is increased accordingly. Thereby, there existed a problem that the fall of the heat exchange efficiency of the heat exchanger plate 100 was caused.

  From this point of view, the present invention provides a heat transfer plate that has a high heat exchange efficiency and can be easily manufactured even when it includes a heat medium pipe that is at least partially curved. It is an object to provide a manufacturing method.

  In order to solve such a problem, in the present invention, a hollow space is formed between the first metal member in which the groove is formed and the second metal member in which the groove is formed. And a rotating tool for inflow agitation inserted from at least one of the front surface and the back surface of the temporary assembly structure formed in the preparation step, and the preparation step of inserting the heat medium pipe into the space portion An inflow agitation step of moving the plastic fluid material moved along the space portion and fluidized by frictional heat into a gap formed around the heat medium pipe, the width of the space portion and At least one of the heights is larger than the outer diameter of the heat medium pipe.

  According to this manufacturing method, since at least one of the width and the height of the space formed by the concave grooves is larger than the outer diameter of the heat medium pipe, a part of the heat medium pipe is curved. Even if it does, a preparatory process can be performed easily. In addition, since the plastic fluidized material is allowed to flow into the gap formed around the heat medium pipe by the inflow stirring step, the gap can be filled, so the heat medium pipe and the surrounding first metal Heat can be efficiently transferred between the member and the second metal member. Thereby, a heat exchanger plate with high heat exchange efficiency can be manufactured, for example, a heat exchanger plate and a cooling target can be efficiently cooled through cooling water through a heat medium pipe.

  In addition, the present invention superimposes the first metal member and the second metal member on which the concave groove is formed so that a hollow space is formed between the concave groove and the back surface of the second metal member, A preparatory step for inserting the heat medium pipe into the space portion, and an inflow stirring rotary tool inserted from at least one of the front and back surfaces of the temporary assembly structure formed in the preparatory step along the space portion. And an inflow stirring step of flowing a plastic fluidized material fluidized by frictional heat into a gap formed around the heat medium pipe, and at least one of the width and height of the space portion Is larger than the outer diameter of the heat medium pipe.

  According to this manufacturing method, at least one of the width and height of the space formed by the concave groove of the first metal member and the back surface of the second metal member is larger than the outer diameter of the heat medium pipe. Even if a part of the heat medium pipe is curved, the preparation process can be easily performed. In addition, since the plastic fluidized material is allowed to flow into the gap formed around the heat medium pipe by the inflow stirring step, the gap can be filled, so the heat medium pipe and the surrounding first metal Heat can be efficiently transferred between the member and the second metal member. Thereby, a heat exchanger plate with high heat exchange efficiency can be manufactured, for example, a heat exchanger plate and a cooling target can be efficiently cooled through cooling water through a heat medium pipe.

  In the inflow stirring step, it is preferable that a closest distance between a tip of the inflow stirring rotating tool and a virtual vertical plane in contact with the heat medium pipe is set to 1 to 3 mm. In the inflow agitation step, it is preferable that the tip of the inflow agitation rotating tool is inserted deeper than an abutting portion formed by abutting the first metal member and the second metal member. According to this manufacturing method, the plastic fluidized material can surely flow into the gap.

  Moreover, it is preferable to include the joining process of performing friction stir welding along the abutting part formed by abutting said 1st metal member and said 2nd metal member. Moreover, it is preferable to perform friction stir welding intermittently along the said abutting part in the said joining process.

  According to this manufacturing method, since the inflow stirring process can be performed with the first metal member and the second metal member fixed, the workability of the inflow stirring process can be improved.

  Moreover, it is preferable to perform the said joining process using a rotary tool smaller than the said rotation tool for inflow stirring. According to such a manufacturing method, plastic fluidization can be achieved up to a deep portion in the inflow stirring step, and the plasticizing region in the friction stir welding in the joining step can be small, so that the joining operation is facilitated.

  Moreover, it is preferable to include the welding process which welds along the abutting part formed by abutting said 1st metal member and said 2nd metal member. In the welding process, it is preferable that welding is intermittently performed along the butt portion.

  According to this manufacturing method, since the inflow stirring process can be performed with the first metal member and the second metal member fixed, the workability of the inflow stirring process can be improved.

  According to the method for manufacturing a heat transfer plate according to the present invention, the heat transfer plate can be easily manufactured and the heat exchange efficiency is high even when a portion of the heat medium pipe is curved. A heat transfer plate can be provided.

[First embodiment]
The best embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a heat transfer plate according to the first embodiment. FIG. 2 is an exploded perspective view showing the heat transfer plate according to the first embodiment. FIG. 3A is an exploded cross-sectional view illustrating the heat transfer plate according to the first embodiment, and FIG. 3B is a diagram illustrating a heat medium tube and a second metal in the first metal member according to the first embodiment. It is sectional drawing which has arrange | positioned the member. FIG. 4 is a cross-sectional view showing the heat transfer plate according to the first embodiment. In the description, up, down, left, and right, front and rear follow the arrows in FIG. 1 unless otherwise specified.

  As shown in FIGS. 1 to 4, the heat transfer plate 1 according to the first embodiment includes a thick plate-shaped first metal member 2 and a second metal member 3 disposed on the first metal member 2. The heat medium pipe 4 is mainly provided between the first metal member 2 and the second metal member 3. The heat medium pipe 4 is curved and formed so as to have a U-shape in plan view.

  As shown in FIGS. 1 and 4, the first metal member 2 and the second metal member 3 are integrally formed by plasticized regions W1 and W2 generated by friction stir welding. Here, the “plasticization region” includes both a state heated by frictional heat of the rotary tool and actually plasticized, and a state where the rotary tool passes and returns to room temperature. On the other hand, on the surface 3a of the second metal member 3, plasticized regions W3 and W4 are formed. Further, plasticized regions W5 and W6 are formed on the back surface 2b of the first metal member 2.

  The first metal member 2 is made of, for example, an aluminum alloy (JIS: A6061). The first metal member 2 plays a role of transferring the heat of the heat medium flowing through the heat medium pipe 4 to the outside or a role of transferring external heat to the heat medium flowing through the heat medium pipe 4. As shown in FIG. 3, a first groove 5 that accommodates one side (lower half) of the heat medium pipe 4 is formed in the surface 2 a of the first metal member 2.

  The first concave groove 5 is a portion that accommodates the lower half of the heat medium pipe 4, has a U shape in plan view, and is formed in a rectangular shape in cross section so that the upper part is open. The first concave groove 5 includes a bottom surface 5c and rising surfaces 5a and 5b that rise vertically from the bottom surface 5c.

  As shown in FIGS. 2 and 3, the second metal member 3 is made of the same aluminum alloy as that of the first metal member 2, and has a rectangular cross section substantially the same as that of the first metal member 2. Both end surfaces of the second metal member 3 are formed flush with both end surfaces of the first metal member 2. Further, both side surfaces 3c and 3d of the second metal member 3 are formed flush with both side surfaces 2c and 2d of the first metal member 2, respectively. On the back surface 3 b of the second metal member 3, a second groove 6 is formed corresponding to a position that is U-shaped in plan view and overlaps the first groove 5.

  As shown in FIGS. 3A and 3B, the second concave groove 6 is a portion that accommodates the other side (upper half portion) of the heat medium pipe 4, and has a cross section that opens downward. It is formed in a viewing rectangle. The second concave groove 6 includes a top surface 6c and vertical surfaces 6a and 6b that vertically fall from the top surface 6c.

  As shown in FIGS. 2 and 3, the heat medium pipe 4 is a cylindrical pipe having a U-shape in plan view. The material of the heat medium pipe 4 is not particularly limited, but is made of copper in the present embodiment. The heat medium pipe 4 is a member that circulates a heat medium such as a high-temperature liquid or a high-temperature gas in the hollow portion 4a and transmits heat to the first metal member 2 and the second metal member 3, or the hollow portion 4a. For example, the heat is transferred from the first metal member 2 and the second metal member 3 by circulating a heat medium such as cooling water or cooling gas. In addition, you may utilize as a member which transmits the heat which generate | occur | produces from a heater to the 1st metal member 2 and the 2nd metal member 3 through the hollow part 4a of the pipe | tube 4 for heat media, for example.

  As shown in FIG. 3B, when the second metal member 3 is disposed on the first metal member 2, the first groove 5 of the first metal member 2 and the second groove 6 of the second metal member 3 To form a space K having a rectangular cross section. In the space K, the heat medium pipe 4 is accommodated.

  Here, the depth of the first concave groove 5 is formed to be ½ of the outer diameter of the heat medium pipe 4. Further, the width of the first concave groove 5 is formed to be 1.1 times the outer diameter of the heat medium pipe 4. On the other hand, the depth of the second concave groove 6 is formed to be 1.1 times the radius of the heat medium pipe 4. The width of the second concave groove 6 is 1.1 times the outer diameter of the heat medium pipe 4. Therefore, when the heat medium pipe 4 and the second metal member 3 are arranged on the first metal member 2, the first groove 5 and the lower end of the heat medium pipe 4 are in contact with each other, and the left and right ends and the upper end of the heat medium pipe 4 are in contact with each other. Are spaced apart from the first concave groove 5 and the second concave groove 6 with a fine gap. In other words, the width and height of the space K are formed larger than the outer diameter of the heat medium pipe 4.

  Since the heat medium pipe 4 having a circular cross section is inserted into the space K having a rectangular cross section, a gap is formed around the heat medium pipe 4. For example, as shown in FIG. 2, if the flow direction of the medium flowing in the heat medium pipe 4 is “Y”, among the voids formed around the heat medium pipe 4, the flow direction Y The portion formed on the upper left side is referred to as “first gap P1”, the portion formed on the upper right side is referred to as “second gap P2”, and the portion formed on the lower left side is referred to as “third gap P3”. A portion formed on the lower right side is referred to as a “fourth gap P4”. A member made up of the first metal member 2, the second metal member 3, and the heat medium pipe 4 is referred to as a “temporary assembly U”.

  Further, as shown in FIG. 3B, the first metal member 2 and the second metal member 3 are abutted to form an abutting portion V. Of the butt portion V, a portion appearing on one side surface of the temporary assembly U is referred to as “butt portion V1”, and a portion appearing on the other side surface is referred to as “butt portion V2”.

  As shown in FIGS. 1 and 4, when the friction stir welding is performed on the abutting portions V <b> 1 and V <b> 2, a part of the first metal member 2 and the second metal member 3 is plastically flown in the plasticizing regions W <b> 1 and W <b> 2. It is an integrated area. That is, when friction stir welding is performed along the abutting portions V1 and V2 using a joining rotary tool 50 (see FIG. 5) described later, the first metal member 2 and the second metal member applied to the abutting portions V1 and V2. The first metal member 2 and the second metal member 3 are joined by fluidizing and integrating the three metal materials by the frictional heat of the joining rotary tool 50.

  As shown in FIGS. 1 and 4, the plasticizing regions W <b> 3 and W <b> 4 are formed along the second groove 6 with the inflow stirring rotary tool 55 (see FIG. 5) inserted from the surface 3 a side of the second metal member 3. It is formed when moved. A part of the plasticizing region W3 flows into the first gap P1 formed around the heat medium pipe 4. A part of the plasticized region W4 flows into the second gap P2 formed around the heat medium pipe 4. That is, the plasticized regions W3 and W4 are regions in which a part of the second metal member 3 is plastically flowed and flows into the first gap P1 and the second gap P2, respectively, It is in contact with the medium tube 4.

  The plasticized regions W5 and W6 are formed when the inflow stirring rotary tool 55 inserted from the back surface 2b side of the first metal member 2 is moved along the first concave groove 5. A part of the plasticized region W5 flows into the third gap P3 formed around the heat medium pipe 4. The plasticized region W6 flows into a fourth gap P4 formed around the heat medium pipe 4. That is, the plasticized regions W5 and W6 are regions in which a part of the first metal member 2 and the second metal member 3 are plastically flowed and flow into the third gap portion P3 and the fourth gap portion P4, respectively. Then, it contacts the heat medium pipe 4.

  Next, a method for manufacturing the heat transfer plate 1 will be described with reference to FIGS. FIG. 5 is a cross-sectional view illustrating a method for manufacturing a heat transfer plate according to the first embodiment, where (a) is a cutting process, (b) is an insertion process and an arrangement process, and (c) is a bonding process. Step (d) is a view showing a first surface side inflow stirring step. FIG. 6 is a cross-sectional view showing a method for manufacturing a heat transfer plate according to the first embodiment, wherein (a) is a second surface side inflow stirring step, and (b) is a first back side inflow stirring step. (C) is the figure which showed the 2nd back surface side inflow stirring process. FIG. 7 is a schematic cross-sectional view showing a first surface side inflow stirring step according to the first embodiment.

  The manufacturing method of the heat exchanger plate according to the first embodiment forms the first metal member 2 and the second metal member 3 and arranges the heat medium pipe 4 and the second metal member 3 on the first metal member 2. From the preparation step, the joining step of performing the friction stir welding by moving the joining rotary tool 50 along the abutting portions V1 and V2, and from the front surface 3a side of the second metal member 3 and the back surface 2b side of the first metal member 2 An inflow agitation step of moving the inflow agitation rotating tool 55 to cause the plastic fluid material Q to flow into the first gap part P1 to the fourth gap part P4.

(Preparation process)
The preparation step includes a cutting step for forming the first metal member 2 and the second metal member 3, an insertion step for inserting the heat medium pipe 4 into the first concave groove 5 formed in the first metal member 2, A disposing step of disposing the second metal member 3 on the one metal member 2.

In the cutting step, as shown in FIG. 5A, the first concave groove 5 having a rectangular shape in cross section is formed on the thick plate member by a known cutting process. Thereby, the 1st metal member 2 provided with the 1st ditch | groove 5 opened upwards is formed.
In the cutting process, the second concave groove 6 having a rectangular shape in cross section is formed in the plate thickness member by a known cutting process. Thereby, the 2nd metal member 3 provided with the 2nd ditch | groove 6 opened below is formed.
In addition, in 1st embodiment, although the 1st metal member 2 and the 2nd metal member 3 were formed by cutting, you may use the extrusion shape material and castings made from aluminum alloy.

  In the insertion step, the heat medium pipe 4 is inserted into the first concave groove 5 as shown in FIG. At this time, the lower half of the heat medium pipe 4 is in contact with the bottom surface 5c of the first concave groove 5, and is separated from the standing surfaces 5a and 5b of the first concave groove 5 with a fine gap.

  In the arranging step, as shown in FIG. 5B, the upper half of the heat medium pipe 4 is inserted into the second concave groove 6 formed in the second metal member 3, The 2nd metal member 3 is arrange | positioned. Thereby, the temporary assembly structure U which consists of the 1st metal member 2, the 2nd metal member 3, and the pipe | tube 4 for heat media is formed. At this time, the heat medium pipe 4 and the compatible surfaces 6a and 6b and the top surface 6c of the second groove 6 formed on the back surface 3b of the second metal member 3 are separated from each other with a fine gap. Further, the first metal member 2 and the second metal member 3 are abutted to form the abutting portions V1 and V2.

(Joining process)
Next, as shown in FIG. 5C, after the surface where the abutting portion V1 appears in the temporary assembly structure U is faced up, friction stir welding is performed along the abutting portion V1. Friction stir welding is performed using a welding rotary tool 50 (a known rotary tool). The joining rotary tool 50 is made of, for example, tool steel, and includes a cylindrical tool body 51 and a pin 53 that hangs down on a concentric axis from the center of the bottom surface 52 of the tool body 51. The pin 53 is formed in a tapered shape that becomes narrower toward the tip. A plurality of small grooves (not shown) and screw grooves along the radial direction may be formed on the peripheral surface of the pin 53 along the axial direction.

  In the friction stir welding, the first metal member 2 and the second metal member 3 are constrained by a jig (not shown), and the joining rotary tool 50 that rotates at a high speed is pushed into the abutting portion V1 and moved along the abutting portion V1. . The aluminum alloy material of the surrounding first metal member 2 and second metal member 3 is heated and fluidized by friction heat, and then cooled and integrated by the pin 53 rotating at high speed. When friction stir welding is performed on the abutting portion V1, friction stir welding is similarly performed on the abutting portion V2.

(Inflow stirring process)
In the inflow stirring step, as shown in FIG. 5D and FIG. 6A to FIG. 6C, the temporary assembly structure including the first metal member 2, the heat medium pipe 4, and the second metal member 3. The inflow stirring rotary tool 55 is moved from the front surface and the back surface of U to cause the plastic fluid material Q to flow into the first gap portion P1 to the fourth gap portion P4. In the inflow agitation process according to the present embodiment, the inflow agitation rotating tool 55 is moved on the surface 3a of the second metal member 3 to allow the plastic fluid material Q to flow into the first gap P1 and the second gap P2. An inflow agitation step, and a back side inflow agitation step in which the inflow agitation rotary tool 55 is moved on the back surface 2b of the first metal member 2 to cause the plastic fluid material Q to flow into the third gap portion P3 and the fourth gap portion P4. It is a waste.

  Of the surface side inflow stirring step, the step of flowing the plastic fluid material Q into the first gap portion P1 is referred to as the first surface side inflow stirring step, and the step of flowing the plastic fluid material Q into the second gap portion P2 is the first step. Two surface side inflow stirring step. Further, the step of flowing the plastic fluid material Q into the third gap P3 is referred to as a first back side inflow stirring step, and the step of flowing the plastic fluid material Q into the fourth gap P4 is referred to as a second back side inflow stirring step. .

  In the first surface side inflow stirring step, as shown in FIG. 5D, in the first gap P1 formed on the upper left side with respect to the flow direction Y of the heat medium pipe 4 (see FIG. 2), The plastic fluidized material Q fluidized by friction stirring is introduced. The inflow stirring rotary tool 55 is made of, for example, tool steel and has a shape equivalent to the joining rotary tool 50, and a concentric shaft is formed from the center of the cylindrical tool body 56 and the bottom surface 57 of the tool body 56. And a pin 58 that hangs down. The inflow stirring rotary tool 55 is larger than the joining rotary tool 50.

  In the first surface side inflow agitation step, the inflow agitation rotating tool 55 that rotates at a high speed is pushed on the surface 3a of the second metal member 3, and a U-shaped trajectory in plan view is formed along the second concave groove 6 below. Thus, the inflow stirring rotary tool 55 is moved. The inflow stirring rotary tool 55 is moved so that a part of the projected portion of the bottom surface 57 (shoulder) of the tool main body 56 overlaps the first gap P1. At this time, the aluminum alloy material of the surrounding second metal member 3 is heated and fluidized by frictional heat by the pin 58 rotating at high speed. Since the inflow stirring rotary tool 55 is pushed in at a predetermined depth, the plastic fluidized material Q plastically fluidized flows into the first gap P1 and contacts the heat medium pipe 4.

  Here, as shown in (b) of FIG. 3, the left and right ends and the upper end of the heat medium pipe 4 are arranged with a fine gap between the first concave groove 5 and the second concave groove 6. When the plastic fluid material Q flows into the first gap P1, the heat of the plastic fluid material Q is taken away by the heat medium pipe 4, so that the fluidity is lowered. Therefore, the plastic fluid material Q that has flowed into the first gap P1 does not flow into the second gap P2 and the third gap P3, but remains in the first gap P1 to be filled and hardened.

  In the second surface-side inflow stirring step, as shown in FIG. 6A, the second gap P2 formed on the upper right side with respect to the flow direction Y (see FIG. 2) of the heat medium pipe 4 is rubbed. The plastic fluidized material Q fluidized by stirring is introduced. Since the second surface side inflow stirring step is the same as the first surface side inflow stirring step except that the second surface side inflow stirring step is performed in the second gap P2, description thereof will be omitted. In addition, after the surface side inflow stirring process is complete | finished, it is preferable to cut and remove the burr | flash formed in the surface 3a of the 2nd metal member 3, and to make the surface 3a smooth.

  In the back side inflow stirring step, as shown in FIGS. 6B and 6C, the front and back surfaces of the temporary assembly U are reversed, and then the first concave groove 5 is formed on the back side 2 b of the first metal member 2. The inflow agitating rotary tool 55 is moved along the flow path, and the plastic fluidized material Q fluidized by frictional heat is caused to flow into the third gap portion P3 and the fourth gap portion P4.

  In the first back side inflow agitation step, as shown in FIG. 6B, the plastic fluid material Q fluidized by friction agitation is caused to flow into the third gap P3. In the first back side inflow agitation step, the inflow agitation rotating tool 55 that rotates at a high speed on the back surface 2b of the first metal member 2 is pushed in, and flows along the first concave groove 5 so as to form a U-shaped trajectory in plan view. The stirring rotary tool 55 is moved. The inflow stirring rotary tool 55 is moved so that a part of the projected portion of the bottom surface 57 (shoulder) of the tool body 56 overlaps the third gap P3 of the heat medium pipe 4. At this time, the aluminum alloy material of the surrounding first metal member 2 is heated and fluidized by frictional heat by the pin 58 rotating at high speed. Since the inflow stirring rotary tool 55 is pushed in at a predetermined depth, the plastic fluidized material Q plastically fluidized flows into the third gap P3 and contacts the heat medium pipe 4.

  In the second back-side inflow stirring step, as shown in FIG. 6C, the plastic fluid material Q fluidized by friction stirring is caused to flow into the fourth gap P4. The second back-side inflow stirring process is the same as the first back-side inflow stirring process except that the second back-side inflow stirring process is performed in the fourth gap P4, and thus the description thereof is omitted. When the back side inflow stirring step is completed, it is preferable to cut and remove burrs formed on the back surface 2b of the first metal member 2 to make the back surface 2b smooth.

  In the front-side inflow agitation step and the back-side inflow agitation step, the pushing amount and insertion position of the inflow agitation rotating tool 55 are determined based on the shape and size of the first gap portion P1 to the fourth gap portion P4. Set. It is preferable that the inflow and stirring rotary tool 55 is brought close to the heat medium pipe 4 so that the heat medium pipe 4 is not crushed, and the plastic fluid material Q flows into the first gap portion P1 to the fourth gap portion P4 without gaps.

  For example, as shown in FIG. 7, the tip of the pin 58 of the inflow agitation rotating tool 55 is connected to the top surface 6c of the second groove 6 (in the case of the back side inflow agitation step, the bottom surface 5c of the first groove 5). It is preferable that the closest distance L between the tip of the pin 58 of the inflow stirring rotary tool 55 and the virtual vertical plane in contact with the heat medium pipe 4 is 1 to 3 mm. Thereby, the plastic fluidized material Q can be surely flowed into the first gap P1 to such an extent that the heat medium pipe 4 is not crushed. If the closest distance L is smaller than 1 mm, the inflow stirring rotary tool 55 is too close to the heat medium tube 4 and the heat medium tube 4 may be crushed. If the closest distance L is greater than 3 mm, the plastic fluid material Q may not flow into the first gap P1.

  The indentation amount (indentation length) of the inflow stirring rotary tool 55 is, for example, the volume of the metal of the second metal member 3 (or the first metal member 2) from which the tool body 56 is pushed away in the first surface side inflow stirring process. Is a length equivalent to the sum of the volume of the plastic fluidized aluminum alloy material filled in the first gap P1 and the volume of burrs generated on both sides in the width direction of the plasticized region W3. Yes.

  According to the heat transfer plate manufacturing method described above, from the first groove 5 formed on the front surface 2 a of the first metal member 2 and the second groove 6 formed on the back surface 3 b of the second metal member 3. In the space portion K to be formed, the width and height of the space portion K are formed larger than the outer diameter of the heat medium tube 4, so that even when a part of the heat medium tube 4 is curved, it is described above. An insertion process and an arrangement process can be easily performed.

  Further, the plastic fluidized material Q is caused to flow into the first gap portion P1 to the fourth gap portion P4 formed around the heat medium pipe 4 by the front surface side inflow stirring step and the back surface side inflow stirring step, whereby the gap Since the portion can be filled, the heat exchange efficiency of the heat transfer plate 1 can be increased.

  Moreover, according to this embodiment, since the 1st metal member 2 and the 2nd metal member 3 are joined using the comparatively small joining rotary tool 50 before the surface side inflow stirring process, In the side inflow stirring step, friction stirring can be performed in a state where the second metal member 3 is securely fixed. Therefore, the friction stir welding in which a large pushing force is applied using the relatively large inflow stirring rotary tool 55 can be performed in a stable state.

  In the present embodiment, the surface-side inflow stirring step is performed after the joining step, but the joining step may be performed after the surface-side inflow stirring step. At this time, if the first metal member 2 and the second metal member 3 are fixed from the width direction and the longitudinal direction using a jig (not shown), the friction stirring in the surface side inflow stirring step can be performed in a stable state. it can.

  Further, in the present embodiment, the friction stir welding is performed over the entire length of the abutting portions V1 and V2 in the joining step, but the present invention is not limited to this, and a predetermined amount is provided along the abutting portions V1 and V2. The first metal member 2 and the second metal member 3 may be temporarily attached by intermittently performing friction stir welding at intervals. According to such a method of manufacturing a heat transfer plate, the surface side inflow stirring step is performed in a state in which the first metal member 2 and the second metal member 3 are securely fixed while reducing the labor and time required for the joining step. As well as the above-described effects, it is possible to manufacture a heat transfer plate with a favorable processing environment and high accuracy.

  Further, in the present embodiment, both the width and height of the space K are formed larger than the outer diameter of the heat medium pipe 4, but either one may be formed larger. Moreover, although the cross-sectional shape of the heat medium pipe 4 is circular in this embodiment, other shapes may be used. Moreover, although the planar view shape of the pipe | tube 4 for heat-medium is U shape in this embodiment, for example, it may be meandering shape or circular shape. Further, the width and depth dimensions of the first concave groove 5 and the second concave groove 6 described above are merely examples, and do not limit the present invention. For example, when the shape of the heat medium pipe 4 in a plan view becomes complicated, the width and depth of the first concave groove 5 and the second concave groove 6 may be appropriately increased accordingly. In the present embodiment, the heat medium pipe 4 and the second metal member 3 are arranged on the first metal member 2, but the present invention is not limited to this. For example, the heat medium pipe 4 may be inserted into the second concave groove 6 of the second metal member 3 and then disposed so as to cover the first metal member 2 from above the second metal member 3.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. The manufacturing method of the heat exchanger plate which concerns on 2nd embodiment is different from 1st embodiment by the point which is not performing the back surface side inflow stirring process.

  FIG. 8 is a cross-sectional view showing a method for manufacturing a heat transfer plate according to the second embodiment, where (a) shows a cutting process and (b) shows an insertion process and an arrangement process. FIG. 9 is a cross-sectional view illustrating a method of manufacturing a heat transfer plate according to the second embodiment, where (a) is a joining step, (b) is a first surface side inflow stirring step, and (c) is a step. The 2nd surface side inflow stirring process is shown. Although not specifically illustrated, the heat medium pipe 4 is assumed to have a U-shape in plan view as in the first embodiment.

  As shown in FIGS. 8 and 9, the heat transfer plate manufacturing method according to the second embodiment forms the first metal member 12 and the second metal member 13, and the heat medium pipe on the first metal member 12. 4 and the second metal member 13, a preparatory step, a joining step of moving the joining rotary tool 50 along the abutting portions V 1, V 2 to perform friction stir welding, and a surface 13 a of the second metal member 13, This includes a front-side inflow agitation step in which the inflow agitation rotating tool 55 is moved to cause the plastic fluid material Q to flow into the first gap P1 and the second gap P2.

(Preparation process)
The preparation process includes a cutting process for forming the first metal member 12 and the second metal member 13, an insertion process for inserting the heat medium pipe 4 into the first groove 15 formed in the first metal member 12, The arrangement | positioning process which arrange | positions the 2nd metal member 13 in the one metal member 12 is included.

  In the cutting step, as shown in FIG. 8A, the first metal member 12 is formed by notching the first concave groove 15 having a U-shaped cross-sectional view in the plate member by a known cutting process. The bottom portion 15 a of the first concave groove 15 is notched in an arc shape and is formed with a curvature equivalent to that of the heat medium pipe 4. The depth of the first groove 15 is formed smaller than the outer diameter of the heat medium pipe 4, and the width of the first groove 15 is formed substantially equal to the outer diameter of the heat medium pipe 4. .

  Next, a second metal member 13 is formed by notching the second concave groove 16 having a rectangular shape in cross section in the plate thickness member by a known cutting process. The width of the second concave groove 16 is formed substantially equal to the outer diameter of the heat medium pipe 4. Further, as shown in FIG. 8B, the depth of the second groove 16 is the second groove when the heat medium pipe 4 and the second metal member 13 are arranged on the first metal member 12. The 16 top surfaces 16c and the heat medium pipe 4 are formed so as to be separated from each other with a fine gap.

  In the insertion step, the heat medium pipe 4 is inserted into the first concave groove 15 as shown in FIG. At this time, the lower half of the heat medium pipe 4 is in surface contact with the bottom 15 a of the first groove 15. When the heat medium pipe 4 is inserted into the first concave groove 15, the upper end of the heat medium pipe 4 is positioned above the surface 12 a of the first metal member 12.

  In the arranging step, as shown in FIG. 8B, the upper portion of the heat medium pipe 4 is inserted into the second concave groove 16 formed in the second metal member 13, while the second metal member 12 is inserted into the second metal member 12. A metal member 13 is disposed. At this time, the heat medium pipe 4 and the compatible surfaces 16a and 16b and the top surface 16c of the second concave groove 16 formed with the second metal member 13 are separated from each other with a fine gap. That is, the width of the space portion K1 formed by the first groove 15 and the second groove 16 is formed substantially equal to the outer diameter of the heat medium pipe 4, and the height H of the space K1 is The outer diameter of the heat medium pipe 4 is larger.

  Here, in the space portion K1, the portion formed on the upper left side with respect to the flow direction Y (see FIG. 2) among the space portions formed around the heat medium pipe 4 is defined as the first space portion P1. A portion formed in the upper right is defined as a second gap portion P2.

(Joining process)
In the joining step, as shown in FIG. 9A, joining is performed along the abutting portions V1 and V2 (see FIG. 8B) which are the abutting portions of the first metal member 12 and the second metal member 13. Friction stir welding is carried out using the rotary tool 50 for use. Thereby, the 1st metal member 12 and the 2nd metal member 13 can be joined.

(Surface-side inflow stirring process)
In the surface side inflow agitation step, friction agitation is performed along the second groove 16 from the surface 13a side of the second metal member 13, as shown in FIGS. In the present embodiment, the surface-side inflow stirring step is a first surface-side inflow stirring step for causing the plastic fluid material Q to flow into the first gap P1, and a second surface for causing the plastic fluid material Q to flow into the second gap P2. Side inflow stirring step.

  In the first surface side inflow agitation step, the inflow agitation rotating tool 55 that rotates at a high speed from the surface 13a side of the second metal member 13 is pushed in, and the inflow so as to exhibit a U shape in plan view along the second concave groove 16 The stirring rotary tool 55 is moved. The inflow stirring rotary tool 55 is moved so that a part of the projected portion of the bottom surface 57 (shoulder) of the tool main body 56 overlaps the first gap P1.

  At this time, the aluminum alloy material of the surrounding first metal member 12 and second metal member 13 is heated and fluidized by frictional heat by the pin 58 rotating at high speed. In the second embodiment, the tip of the inflow stirring rotary tool 55 is pushed so as to be positioned below the abutting portion V between the first metal member 12 and the second metal member 13, so that it is plasticized. The plastic fluidized material Q surely flows into the first gap P1 and comes into contact with the heat medium pipe 4.

  Here, as shown in FIG. 9 (b), the upper end of the heat medium pipe 4 is arranged with a minute gap from the second concave groove 16, but the plastic fluid material Q is in the first gap portion. When flowing into P1, the heat of the plastic fluidized material Q is taken away by the heat medium pipe 4, so that the fluidity is lowered. Therefore, the plastic fluid material Q does not flow into the second gap P2, but remains in the first gap P1 and is filled and cured.

  In the second surface side inflow stirring step, as shown in FIG. 9C, the second gap P2 formed on the upper right side with respect to the flow direction Y of the heat medium pipe 4 (see FIG. 2) is rubbed. The plastic fluidized material Q fluidized by stirring is introduced. Since the second surface side inflow stirring step is the same as the first surface side inflow stirring step except that the second surface side inflow stirring step is performed in the second gap P2, description thereof will be omitted. In addition, after the surface side inflow stirring process is complete | finished, it is preferable to cut and remove the burr | flash formed in the surface 13a of the 2nd metal member 13, and to make the surface 13a smooth.

According to the heat transfer plate manufacturing method described above, in the space portion K1 including the first concave groove 15 formed in the first metal member 12 and the second concave groove 16 formed in the second metal member 13, Since the height of the space K1 is formed to be larger than the outer diameter of the heat medium pipe 4, the arrangement step described above can be easily performed even when a part of the heat medium pipe 4 is curved. it can.
Further, the void portion can be filled by flowing the plastic fluid material Q into the first void portion P1 and the second void portion P2 formed around the heat medium pipe 4 by the surface side inflow stirring step. Therefore, the heat exchange efficiency of the heat transfer plate can be increased.

  In the present embodiment, the width of the first concave groove 15 is formed to be approximately equal to the outer diameter of the heat medium pipe 4, but the present invention is not limited to this. You may form larger than the outer diameter of the pipe 4 for work. Moreover, you may form so that the curvature of the bottom part 15a of the 1st ditch | groove 15 may become smaller than the curvature of the pipe | tube 4 for heat media. Thereby, the insertion process which inserts the pipe | tube 4 for heat media, and the arrangement | positioning process which arrange | positions the 2nd metal member 13 can be performed easily.

[Third embodiment]
Next, a third embodiment of the present invention will be described. The manufacturing method of the heat exchanger plate according to the third embodiment is different from the first embodiment in that both the first concave groove 25 and the second concave groove 26 are formed with curved surfaces. FIG. 10 is a cross-sectional view illustrating a method of manufacturing a heat transfer plate according to the third embodiment, where (a) is a cutting step, (b) is a joining step, and (c) is a surface-side inflow agitation. A process is shown. Although not specifically illustrated, it is assumed that the heat medium pipe 4 has a U-shape in plan view as in the first embodiment.

  As shown in FIG. 10, the heat transfer plate manufacturing method according to the third embodiment forms the first metal member 22 and the second metal member 23, and the heat medium pipe 4 and the first metal member 22 on the first metal member 22. In the preparation step of arranging the two metal members 23, the joining step of moving the joining rotary tool 50 along the abutting portions V1 and V2 to perform friction stir welding, and the surface 23a of the second metal member 23, the second concave The plastic fluid material Q fluidized by frictional heat in the first gap P1 and the second gap P2 formed around the heat medium pipe 4 by moving the inflow stirring rotary tool 55 along the groove 26. It includes a front-side inflow stirring step for inflow.

(Preparation process)
The preparation step includes a cutting step for forming the first metal member 22 and the second metal member 23, an insertion step for inserting the heat medium pipe 4 into the first concave groove 25 formed in the first metal member 22, and a first step The arrangement | positioning process which arrange | positions the 2nd metal member 23 to the one metal member 22 is included.

In the cutting process, as shown in FIG. 10A, the first metal member 22 is formed by notching the first concave groove 25 having a semicircular shape in cross section in the plate thickness member by a known cutting process. The radius of the first concave groove 25 is formed to be equal to the radius of the heat medium pipe 4.
Similarly, the second metal member 23 is formed by cutting out the second concave groove 26 having a rectangular shape in cross section in the plate thickness member. The second concave groove 26 is opened downward, and the width of the opening is formed substantially equal to the outer diameter of the heat medium pipe 4. Further, the curvature of the top surface 26 c of the second concave groove 26 is formed so as to be larger than the curvature of the heat medium pipe 4.

  In the inserting step, the lower half of the heat medium pipe 4 is inserted into the first concave groove 25 as shown in FIG. The lower half of the heat medium pipe 4 is in surface contact with the first concave groove 25.

In the arrangement step, as shown in FIG. 10B, the upper half of the heat medium pipe 4 is inserted into the second concave groove 26 formed in the second metal member 23, and the first metal member 22 is inserted. The second metal member 23 is disposed. The height H of the space K2 formed by overlapping the first concave groove 25 and the second concave groove 26 is formed to be larger than the outer diameter of the heat medium pipe 4.
Here, of the gap formed around the heat medium pipe 4, the portion formed on the upper left side with respect to the flow direction Y (see FIG. 2) is defined as the first gap P1, and is formed on the upper right side. This portion is defined as a second gap portion P2.

(Joining process)
Next, as shown in FIG. 10B, friction stir welding is performed along the abutting portions V <b> 1 and V <b> 2 by using a welding rotary tool 50 (see FIG. 5). Thereby, the 1st metal member 22 and the 2nd metal member 23 can be joined.

(Surface-side inflow stirring process)
Next, as shown in FIG. 10C, friction stirring is performed along the second concave groove 26 from the surface 23 a side of the second metal member 23. In the present embodiment, the surface-side inflow stirring step is a first surface-side inflow stirring step for causing the plastic fluid material Q to flow into the first gap P1, and a second surface for causing the plastic fluid material Q to flow into the second gap P2. Side inflow stirring step.

  In the friction agitation in the first surface side inflow agitation step, the inflow agitation rotating tool 55 that rotates at a high speed from the surface 23a side of the second metal member 23 is pushed in so as to exhibit a U shape in plan view along the second concave groove 26. Next, the rotating tool 55 for inflow stirring is moved. The inflow stirring rotary tool 55 moves so that a part of the projected portion of the bottom surface 57 (shoulder) of the tool main body 56 overlaps the first gap P1. At this time, the aluminum alloy material of the surrounding second metal member 23 is heated and fluidized by frictional heat by the pin 58 rotating at high speed. Since the inflow stirring rotary tool 55 is pushed in at a predetermined depth, the plastic fluidized material Q plastically fluidized flows into the first gap P1 and contacts the heat medium pipe 4.

  In the second surface side inflow agitation step, the plastic fluid material Q fluidized by friction agitation is applied to the second gap P2 formed on the upper right side with respect to the flow direction Y of the heat medium pipe 4 (see FIG. 2). Let it flow. Since the second surface side inflow stirring step is the same as the first surface side inflow stirring step except that the second surface side inflow stirring step is performed in the second gap P2, description thereof is omitted. When the front-side inflow stirring step is completed, it is preferable that the burrs formed on the surface 23a of the second metal member 23 are cut and removed to be smooth.

According to the method for manufacturing a heat transfer plate described above, even if the first concave groove 25 and the second concave groove 26 are both formed to be curved surfaces, the first concave groove 25 and the second concave groove 26 are formed. Since the height H of the space portion K2 to be formed is larger than the outer diameter of the heat medium pipe 4, even if the heat medium pipe 4 is partially curved, the arrangement step described above Can be easily performed.
Further, the void portion can be filled by flowing the plastic fluid material Q into the first void portion P1 and the second void portion P2 formed around the heat medium pipe 4 by the surface side inflow stirring step. Therefore, the heat exchange efficiency of the heat transfer plate can be increased.

[Fourth embodiment]
Next, a fourth embodiment of the present invention will be described. The manufacturing method of the heat exchanger plate which concerns on 4th embodiment differs from 1st embodiment by the point by which the ditch | groove is not formed in the 2nd metal member.

  FIG. 11 is a cross-sectional view illustrating a method of manufacturing a heat transfer plate according to the fourth embodiment, where (a) is a cutting process, (b) is an insertion process and an arrangement process, and (c) is a surface. It is the figure which showed the side inflow stirring process. Although not specifically illustrated, it is assumed that the heat medium pipe 4 has a U-shape in plan view as in the first embodiment.

  As shown in FIG. 11, the method for manufacturing a heat transfer plate according to the fourth embodiment forms the first metal member 32 and the second metal member 33 and arranges the first metal member 32 on the second metal member 33. A preparatory process, a joining process of moving the joining rotary tool 50 (see FIG. 5) along the abutting portions V1 and V2 to perform friction stir welding, the surface 33a side of the second metal member 33, and the first metal member 32, the inflow stirring step of moving the inflow stirring rotary tool 55 from the back surface 32b side of the 32 and flowing the plastic fluid material Q into the first gap portion P1 to the fourth gap portion P4.

(Preparation process)
The preparation step includes a cutting step for forming the first metal member 32 and the second metal member 33, an insertion step for inserting the heat medium pipe 4 into the first concave groove 35 formed in the first metal member 32, and a first step The arrangement | positioning process which arrange | positions the 2nd metal member 33 to the one metal member 32 is included.

  In the cutting step, as shown in FIG. 11A, the first metal member 32 is formed by cutting out the first concave groove 35 having a rectangular cross-sectional view in the plate thickness member by a known cutting process. The depth of the first groove 35 is 1.1 times the outer diameter of the heat medium pipe 4. The width of the first groove 35 is 1.1 times the outer diameter of the heat medium pipe 4.

  In the inserting step, the heat medium pipe 4 is inserted into the first concave groove 35 of the first metal member 32 as shown in FIG.

  In the arranging step, the second metal member 33 is arranged above the first metal member 32 as shown in FIG. That is, the heat medium pipe 4 is disposed in the space K3 formed by the first concave groove 35 and the bottom surface (lower surface) 33b of the second metal member 33. At this time, as shown in FIG. 11B, the lower end of the heat medium pipe 4 is in contact with the bottom surface 35 c of the first groove 35, and the upper end is separated from the bottom surface 33 b of the second metal member 33.

(Joining process)
In the joining step, as shown in FIGS. 11B and 11C, friction stir welding is performed using the joining rotary tool 50 (see FIG. 5) along the abutting portions V1 and V2. Since the joining process is the same as the joining process of the first embodiment described above, detailed description thereof is omitted.

(Inflow stirring process)
In the inflow agitation step, the inflow agitation rotating tool 55 is moved from the front surface and the back surface of the temporary assembly U composed of the first metal member 32, the heat medium pipe 4 and the second metal member 33, and the first gap portions P1 to P1 are moved. The plastic fluid material Q is caused to flow into the fourth gap P4.
Since the inflow stirring process is substantially the same as the inflow stirring process according to the first embodiment, detailed description thereof is omitted.

  According to the manufacturing method according to the fourth embodiment described above, even if the first metal groove 32 is provided only in the first metal member 32 without providing the groove in the second metal member 33, the first groove By forming the width and depth of the groove 35 to be larger than the outer diameter of the heat medium pipe 4, it is possible to obtain substantially the same effect as that of the first embodiment.

  In addition, although the 1st ditch | groove 35 was formed in the cross sectional view rectangle in this embodiment, it is not limited to this, You may form so that a curved surface may be included. Moreover, although the inflow stirring process was performed from the surface and the back surface of the temporary assembly structure U which consists of the 1st metal member 32, the pipe | tube 4 for a heat medium, and the 2nd metal member 33, the space part K3 and the pipe | tube 4 for a heat medium. Depending on the shape, it may be performed from either one.

  The embodiment according to the present invention has been described above. However, the present invention is not limited to this, and can be appropriately changed without departing from the spirit of the present invention. For example, a welding process may be performed instead of the joining process. FIG. 12 is a perspective view showing a welding process according to the present embodiment.

  In the welding process, welding is performed along the abutting portions V (V1, V2) appearing on the side surfaces of the temporarily assembled structure (first metal member 2, second metal member 3, and heat medium pipe 4) formed in the preparation process. I do. The type of welding in the welding process is not particularly limited, but it is preferable to perform overlay welding such as MIG welding or TIG welding and cover the butt portions V1 and V2 with the weld metal T. Thus, by performing a welding process, since an inflow stirring process can be performed in the state which fixed the 1st metal member 2 and the 2nd metal member 3, workability | operativity of an inflow stirring process can be improved. In the welding process, welding may be performed over the entire length of the abutting portions V1 and V2, or may be performed intermittently with a predetermined interval. In the welding process, a groove may be formed along the abutting portions V1 and V2, and the weld metal T may be filled in the groove.

  Further, in the above-described embodiment, the inflow stirring rotary tool 55 used in the inflow stirring process is made larger than the joining rotary tool 50 used in the joining process. It may be used. If it does in this way, the rotation tool used at each process can be unified, the exchange time of a rotation tool can be omitted, and construction time can be shortened.

It is the perspective view which showed the heat exchanger plate which concerns on 1st embodiment. It is the disassembled perspective view which showed the heat exchanger plate which concerns on 1st embodiment. (A) is a disassembled sectional view showing the heat transfer plate according to the first embodiment, (b) a cross section in which the heat medium pipe and the second metal member are arranged on the first metal member according to the first embodiment. FIG. It is sectional drawing which showed the heat exchanger plate which concerns on 1st embodiment. It is sectional drawing which showed the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, Comprising: (a) is a cutting process, (b) is an insertion process and an arrangement | positioning process, (c) is a joining process, (d () Is the figure which showed the 1st surface side inflow stirring process. It is sectional drawing which showed the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, Comprising: (a) is a 2nd surface side inflow stirring process, (b) is a 1st back surface side inflow stirring process, (c). These are figures which showed the 2nd back surface side inflow stirring process. It is the schematic cross section which showed the 1st surface side inflow stirring process which concerns on 1st embodiment. It is sectional drawing which showed the manufacturing method of the heat exchanger plate which concerns on 2nd embodiment, Comprising: (a) is a cutting process, (b) is the figure which showed the insertion process and the arrangement | positioning process. It is sectional drawing which showed the manufacturing method of the heat exchanger plate which concerns on 2nd embodiment, Comprising: (a) is a joining process, (b) is a 1st surface side inflow stirring process, (c) is a 2nd surface. A side inflow stirring process is shown. It is sectional drawing which showed the manufacturing method of the heat exchanger plate which concerns on 3rd embodiment, (a) is a cutting process, (b) is a joining process, (c) shows the surface side inflow stirring process. It is sectional drawing which showed the manufacturing method of the heat exchanger plate which concerns on 4th embodiment, Comprising: (a) is a cutting process, (b) is an insertion process and an arrangement | positioning process, (c) is a surface side inflow stirring process. FIG. It is the perspective view which showed the welding process which concerns on this embodiment. It is the figure which showed the heat exchanger plate which concerns on patent document 1, Comprising: (a) is a perspective view, (b) is sectional drawing.

DESCRIPTION OF SYMBOLS 1 Heat-transfer plate 2 1st metal member 3 2nd metal member 4 Heat medium pipe 5 1st groove 6 Second groove 50 Joining rotary tool 55 Inflow stirring rotary tool K Space part L Nearest distance P Space part Q Plastic flow material U Temporary assembly structure V Butt joint W Plasticization region

Claims (9)

The first metal member formed with the groove and the second metal member formed with the groove are overlapped so that a hollow space is formed between the grooves, and the heat medium is formed in the space. A preparation step of inserting a tube;
A gap formed around the heat medium pipe by moving the inflow stirring rotary tool inserted from at least one of the front surface and the back surface of the temporary assembly structure formed in the preparation step along the space. An inflow agitation step for introducing a plastic fluidized material fluidized by frictional heat into the part,
At least one of the width | variety and height of the said space part is larger than the outer diameter of the said pipe | tube for heat media, The manufacturing method of the heat exchanger plate characterized by the above-mentioned. The first metal member and the second metal member on which the groove is formed are overlapped so that a hollow space is formed between the groove and the back surface of the second metal member, and heat is applied to the space. A preparation step of inserting a medium tube;
The inflow stirring rotary tool inserted from at least one of the front and back surfaces of the temporary assembly structure formed in the preparation step is moved along the space portion, and is formed around the heat medium pipe. An inflow agitation step for injecting a plastic fluidized material fluidized by frictional heat into the void, and
At least one of the width | variety and height of the said space part is larger than the outer diameter of the said pipe | tube for heat media, The manufacturing method of the heat exchanger plate characterized by the above-mentioned.   3. The closest distance between the distal end of the inflow stirring rotary tool and the virtual vertical plane in contact with the heat medium pipe is set to 1 to 3 mm in the inflow stirring step. The manufacturing method of the heat exchanger plate as described in 2.   In the inflow stirring step, the tip of the inflow stirring rotating tool is inserted deeper than an abutting portion formed by abutting the first metal member and the second metal member. The manufacturing method of the heat exchanger plate as described in any one of Claims 3.   5. The method according to claim 1, further comprising a joining step in which friction stir welding is performed along an abutting portion formed by abutting the first metal member and the second metal member. The manufacturing method of the heat-transfer board of description.   6. The method for manufacturing a heat transfer plate according to claim 5, wherein in the joining step, friction stir welding is intermittently performed along the abutting portion.   The method for manufacturing a heat transfer plate according to claim 5 or 6, wherein the joining step is performed using a rotating tool smaller than the rotating tool for inflow stirring.   5. The welding process according to claim 1, further comprising a welding step of performing welding along a butted portion formed by butting the first metal member and the second metal member. Manufacturing method of heat transfer plate.   The method for manufacturing a heat transfer plate according to claim 8, wherein in the welding step, welding is intermittently performed along the abutting portion.

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