JP5071132B2 - Manufacturing method of heat transfer plate - Google Patents

Description

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

A heat transfer plate arranged in contact with or close to an object to be heat exchanged, heated or cooled is provided with a heat medium pipe for circulating a heat medium such as high-temperature liquid or cooling water through a base member as a main body. It is formed by insertion.
As a method for manufacturing such a heat transfer plate, for example, a method described in Patent Document 1 is known. FIG. 10 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 includes a base groove 102 having a lid groove 106 having a rectangular cross-sectional view opening on the surface, a concave groove 108 opening on the bottom surface of the lid groove 106, and heat inserted into the concave groove 108. A medium pipe 116 and a lid plate 110 fitted in the lid groove 106, and along the abutting surfaces of the side walls 105, 105 and the side surfaces 113, 114 of the lid plate 110 in the lid groove 106. By performing the friction stir welding, the plasticized regions W ₀ and W ₀ are formed.

JP 2004-314115 A

  As shown in FIG. 10B, 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 lower surface of the lid plate 110. If the gap portion 120 exists inside the plate 100, the heat radiated from the heat medium pipe 116 becomes difficult to be transmitted to the cover plate 110, and the heat exchange efficiency of the heat transfer plate 100 is reduced. It was.

  From such a viewpoint, an object of the present invention is to provide a method for manufacturing a heat transfer plate with high heat exchange efficiency in a heat transfer plate manufactured by friction stir welding.

  The invention according to claim 1 for solving such a problem includes an insertion step of inserting a heat medium pipe into a concave groove formed in a bottom surface of a lid groove opened on the surface side of the base member, and the lid A lid groove closing step of placing a lid plate in the groove, and a gap formed on the periphery of the heat medium tube by moving the rotating tool for inflow stirring along the concave groove on the surface of the lid plate; And an inflow stirring step for introducing a plastic fluidized material fluidized by frictional heat.

  According to such a manufacturing method, since the gap can be filled by flowing the plastic fluid material into the gap, heat can be efficiently transferred between the heat medium pipe and the surrounding base member and the cover plate. Can communicate. Thereby, a heat exchanger plate with high heat exchange efficiency can be manufactured, for example, a heat exchanger plate and a cooling subject can be cooled efficiently through cooling water through a heat medium pipe.

  According to a second aspect of the present invention, before the inflow stirring step, the joining rotary tool is moved along the abutting portion between the side wall of the lid groove and the side surface of the lid plate, and the base member and the lid plate are moved. The method for manufacturing a heat transfer plate according to claim 1, further comprising a joining step of performing friction stir welding.

  According to this manufacturing method, since the inflow stirring step can be performed in a state where the lid plate is securely fixed, a heat transfer plate having a favorable processing environment and high accuracy can be manufactured.

  The invention according to claim 3 is characterized in that, in the joining step, the lid plate that performs friction stir welding intermittently along the abutting portion between the side wall of the lid groove and the side surface of the lid plate is temporarily attached. It is a manufacturing method of the heat exchanger plate of Claim 2.

  According to such a manufacturing method, the inflow stirring process can be performed while the lid plate is securely fixed while reducing the labor and time required for the joining process, and a heat transfer plate with a favorable processing environment and high accuracy is manufactured. can do.

  The invention according to claim 4 is characterized in that the inflow stirring rotary tool is larger than the joining rotary tool. It is a manufacturing method of a heat exchanger plate.

  According to such a manufacturing method, it is possible to plastically fluidize to a portion deeper than the bottom surface of the lid plate with the inflow agitation rotating tool, and the plasticization region in the friction agitation welding in the joining process can be small. It becomes easy.

  The invention according to claim 5 is characterized in that, in the inflow stirring step, the tip of the inflow stirring rotating tool is inserted deeper than the bottom surface of the lid groove. It is a manufacturing method of the heat exchanger plate as described in a term.

  According to this manufacturing method, plastic fluidization can be reliably performed to a deeper portion than the bottom surface of the cover plate with the inflow stirring rotary tool.

  The invention according to claim 6 is characterized in that, in the inflow stirring step, the plasticized region generated in the joining step is re-stirred by the rotating tool for inflow stirring. It is a manufacturing method of the heat exchanger plate of Claim 1.

  According to such a manufacturing method, the inflow stirring process can be performed with the lid plate fixed securely, and the plasticized region exposed to the surface of the heat transfer plate is only by the rotating tool for inflow stirring. Can do.

  In the invention according to claim 7, after the inflow stirring joining step, an upper lid plate that covers the lid plate in an upper lid groove formed wider than the lid groove on the surface side of the lid groove of the base member. An upper lid groove closing step to be arranged, and a friction rotating stir welding between the base member and the upper lid plate by moving the joining rotary tool along the upper abutting portion between the side wall of the upper lid groove and the side surface of the upper lid plate The method for manufacturing a heat transfer plate according to any one of claims 1 to 6, further comprising an upper lid joining step.

  According to this manufacturing method, on the surface side of the heat transfer plate, since the friction stir welding is further performed using the upper cover plate wider than the cover plate, the heat medium pipe is disposed at a deeper position of the heat transfer plate. be able to.

  The method for producing a heat transfer plate according to the present invention exhibits an excellent effect that a heat transfer plate with high heat exchange efficiency 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 embodiment. FIG. 2 is an exploded cross-sectional view illustrating the heat transfer plate according to the embodiment. FIG. 3 is a cross-sectional view showing the heat transfer plate according to the embodiment.

As shown in FIGS. 1 to 3, the heat transfer plate 1 according to the first embodiment includes a thick plate-shaped base member 2 having a front surface 3 and a back surface 4, and a lid groove 6 opened on the front surface 3 of the base member 2. And a heat medium pipe 16 to be inserted into the concave groove 8 opened in the bottom surface of the lid groove 6. The base member 2 and the cover plate 10 are integrally formed by plasticizing regions W ₁ and W ₂ formed 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. The plasticized regions W ₁ and W ₂ are configured along the abutting portion V between the side walls 5a and 5b of the lid groove 6 and the side surfaces 13a and 13b of the lid plate 10, and the joining rotary tool 20 (see FIG. 4). Is moved along the butting portion V. On the other hand, the cover plate 10, deeper than the plasticized region _W 1, _{W 2} of the second plasticized region _W 3, _{W 4} reaching the base member 2 is generated. The plasticized regions W ₃ and W ₄ are generated on the surface of the cover plate 10 by moving the inflow stirring rotary tool 25 (see FIG. 4) along the lower concave groove 8, and are used for the heat medium. It is generated by flowing into the gap P formed around the pipe 16.

  The base member 2 is made of, for example, an aluminum alloy (JIS: A6061). The base member 2 serves to transmit the heat of the heat medium flowing through the heat medium pipe 16 to the outside, or plays a role of transferring external heat to the heat medium flowing through the heat medium pipe 16. As shown in FIG. 2, the heat medium pipe 16 is accommodated therein. A cover groove 6 is formed in the surface 3 of the base member 2, and a groove 8 narrower than the cover groove 6 is formed in the center of the bottom surface of the cover groove 6. The lid groove 6 is a portion where the lid plate 10 covering the heat medium pipe 16 is disposed, and is continuously formed over the longitudinal direction of the base member 2. The lid groove 6 has a rectangular shape in a sectional view, and includes side walls 5 a and 5 b that rise vertically from the bottom surface 5 c of the lid groove 6. The concave groove 8 is a portion into which the heat medium pipe 16 is inserted, and is formed continuously over the longitudinal direction of the base member 2. The concave groove 8 is a U-shaped groove with an upper opening, and a semicircular curved surface 7 having a radius of curvature equivalent to the outer periphery of the heat medium pipe 16 is formed at the lower end. The opening of the groove 8 is formed with a width substantially equal to the outer diameter of the heat medium pipe 16.

As shown in FIGS. 2 and 3, the cover plate 10 is made of an aluminum alloy similar to the base member 2, and has an upper surface (surface) 11 and a lower surface that form a rectangular cross section substantially the same as the cross section of the cover groove 6 of the base member 2. 12, side surface 13a and side surface 13b. As shown in FIG. 3, the lid plate 10 is inserted and disposed in the lid groove 6. The side surfaces 13a and 13b of the lid plate 10 are in surface contact with the side walls 5a and 5b of the lid groove 6 or face each other with a fine gap. Here, as shown in FIG. 3, below the abutting faces of the side surface 13a and the side walls 5a, and butt portion V _1, following the abutting faces of the side face 13b and the sidewall 5b, the butt portion V _2.

  The heat medium pipe 16 is formed of, for example, a copper pipe, and is a cylindrical pipe having a hollow portion 18 having a circular cross section as shown in FIG. The outer diameter of the heat medium pipe 16 is formed to be approximately equal to the width of the groove 8, and the lower half of the heat medium pipe 16 and the curved surface 7 of the groove 8 are surfaces as shown in FIG. 3. Contact. The upper end of the heat medium pipe 16 is in line contact with the lower surface 12 of the cover plate 10 at the contact portion 16a. The heat medium pipe 16 is a member that circulates a heat medium such as a high-temperature liquid or a high-temperature gas in the hollow portion 18 to transmit heat to the base member 2 and the cover plate 10, or a cooling water in the hollow portion 18, for example. A member that circulates a heat medium such as a cooling gas to transmit heat from the base member 2 and the cover plate 10. Moreover, you may utilize as a member which transmits the heat which generate | occur | produces from a heater to the base member 2 and the cover board 10, for example through a hollow part 18 of the pipe | tube 16 for heat-medium.

  In the first embodiment, the concave groove 8 and the lower half of the heat medium pipe 16 are brought into surface contact, and the upper end of the heat medium pipe 16 and the lower surface 12 of the cover plate 10 are brought into line contact. However, the present invention is not limited to this. For example, the depth of the concave groove 8 may be the same as the outer diameter of the heat medium pipe 16 or a range up to 1.2 times the outer diameter. Further, the width of the groove 8 may be the same as the outer diameter of the heat medium pipe 16 or a range up to 1.1 times the outer diameter.

The space P formed around the heat medium pipe 16 is a space surrounded by the heat medium pipe 16, the groove 8, and the lower surface 12 of the lid plate 10, as shown in FIG. 2. In the first embodiment, since the upper end of the heat medium pipe 16 and the lower surface 12 of the cover plate 10 are in contact with each other at the contact portion 16a, the two gap portions P ₁ and P ₂ with the contact portion 16a as a boundary. Is formed. In addition, the space | gap part P is suitably determined based on the shape of the ditch | groove 8, the heat medium pipe | tube 16, etc., and is not limited to an above described form.

As shown in FIGS. 1 and 3, the plasticized regions W ₁ and W ₂ are such that when the abutting portions V ₁ and V ₂ are subjected to friction stir welding, part of the base member 2 and the cover plate 10 is plastically flowed. It is an integrated area. Note that the plasticizing region includes both a state in which the rotating tool is heated by frictional heat and is actually plasticized, and a state in which the rotating tool passes and returns to room temperature. The plasticized regions W ₁ and W ₂ are indicated by hatched portions in FIG. That is, along the butt portion V _1, V _2, when subjected to friction stir welding using the joining rotation tool 20 to be described later, the base member 2 and the lid plate 10 according to the periphery of the butted portion V _1, V ₂ metal The base member 2 and the cover plate 10 are joined by the material being fluidized and integrated by frictional heat of the joining rotary tool 20.

As shown in FIGS. 1 and ₃ , the plasticizing regions W ₃ and W ₄ are the upper surface (surface) 11 of the lid plate 10 and the inflow stirring stirring rotary tool 25 along the lower groove 8 (see FIG. 4). It is generated by moving. Note that the plasticizing region includes both a state in which the rotating tool is heated by frictional heat and is actually plasticized, and a state in which the rotating tool passes and returns to room temperature. The plasticizing regions W ₃ and W ₄ are made of plastic fluid material Q (a part of the plasticizing regions W ₃ and W ₄ ) fluidized by frictional heat generated by the rotation of the inflow stirring rotary tool 25 of the heat medium pipe 16. It is a part generated when flowing into the void P formed in the periphery. That is, the plasticized regions W ₃ and W ₄ are regions in which a part of the base member 2 and the cover plate 10 are plastically flowed and flow into the gap portion P to be integrated, and are in contact with the heat medium pipe 16. To do. The plasticized regions W ₃ and W ₄ are indicated by hatched portions in FIG.

  When performing friction stir welding, by setting the pushing amount and insertion position of the inflow stirring rotary tool 25 based on the shape and size of the gap P, the plastic fluid material Q is placed in the gap P. It can flow in suitably. That is, it is preferable to bring the plastic fluid material Q into the gap P without gaps by bringing the rotary tool closer to the extent that the heat medium pipe 16 does not collapse.

According to the heat transfer plate 1 as described above, the base member 2 and the cover plate 10 are integrated in a plasticized region W ₁ , W ₂ by both metal materials being plastically fluidized by friction stir welding. In the plasticized regions W ₃ and W ₄ , the fluidized plastic fluid material Q flows into the gap P. Thereby, while joining the base member 2 and the cover board 10, the space | gap part P can be filled up. Further, at the time of friction stir welding, the heat medium pipe 16 is pressurized by the bottom surface 27 (shoulder) of the tool body 26 of the inflow stirring rotary tool 25 through the plastic fluid material Q, so that the groove 8 The curved surface 7 can be brought into surface contact. Thereby, for example, heat from the heat medium circulating in the heat medium pipe 16 can be efficiently transmitted.

  Next, the manufacturing method of the heat exchanger plate 1 is demonstrated using FIG. FIG. 4 is a cross-sectional view showing a method of manufacturing a heat transfer plate according to the first embodiment, wherein (a) is a view showing an end mill process and a cutting process, and (b) is a pipe insertion process. (C) is a view showing a lid groove closing step, (d) is a view showing a joining step, and (e) is an inflow stirring step. (F) is a completed drawing. FIG. 5 is a plan view showing a heat transfer unit using the heat transfer plate according to the first embodiment.

The heat transfer plate manufacturing method according to the first embodiment includes an end mill process and a cutting process for forming the base member 2, an insertion process for inserting the heat medium pipe 16 into the concave groove 8 formed in the base member 2, and On the surface of the lid plate 10, a lid groove closing step for placing the lid plate 10 in the lid groove 6, a joining step for moving the joining rotary tool 20 along the abutting portions V ₁ and V ₂ to perform friction stir welding, and a surface of the lid plate 10. An inflow agitation step in which the plastic fluid material Q fluidized by frictional heat is caused to flow into the gap P formed around the heat medium pipe 16 by moving the inflow agitation rotating tool along the concave groove 8; , Including.

(End mill process and cutting process)
First, as shown in FIG. 4A, the lid groove 6 is formed in the thick plate member by a known end mill process. Then, a concave groove 8 having a semicircular cross section is formed on the bottom surface of the lid groove 6 by cutting or the like. Thereby, the base member 2 provided with the cover groove 6 and the concave groove 8 opened in the bottom face of the cover groove 6 is formed. The concave groove 8 is provided with a curved surface 7 having a semicircular cross section in the lower half, and is opened upward with a certain width from the upper end of the curved surface 7. In the first embodiment, the base member 2 is formed by end milling and cutting, but an extruded shape or cast product made of aluminum alloy may be used.

(Insertion process)
Next, as shown in FIG. 4B, the heat medium pipe 16 is inserted into the groove 8. At this time, the lower half of the heat medium pipe 16 is in surface contact with the curved surface 7 forming the lower half of the groove 8.

(Cover groove closing process)
Next, as shown in FIG. 4C, a lid plate 10 made of an aluminum alloy is disposed in the lid groove 6 of the base member 2. At this time, the lower surface 12 of the cover plate 10 and the upper end of the heat medium pipe 16 are in line contact, and the upper surface 11 of the cover plate 10 is flush with the surface 3 of the base member 2. Further, here, the abutting portions V ₁ and V ₂ are formed by the side walls 5 a and 5 b (see FIG. 4B) of the lid groove 6 and the side surfaces 13 a and 13 b of the lid plate 10.

(Joining process)
Next, as shown in FIG. 4D, friction stir welding is performed along the butted portions V ₁ and V ₂ . Friction stir welding is performed using a welding rotary tool 20 (a known rotary tool). The joining rotary tool 20 is made of, for example, tool steel, and includes a cylindrical tool body 21 and a pin 23 depending on a concentric axis from the center of the bottom surface 22 thereof. The pin 23 is formed in a tapered shape that becomes narrower toward the tip. Note that a plurality of small grooves (not shown) and screw grooves along the radial direction may be formed on the peripheral surface of the pin 23 along the axial direction thereof.

Friction stir welding is a base member 2 and in a state of being restrained by a jig the cover plate 10 (not shown), push the joining rotation tool 20 rotating at a high speed to the respective butt portions V _1, V _2, butt portions V _1, V ₂ Move along. By the pin 23 rotating at high speed, the surrounding base member 2 and the aluminum alloy material of the lid plate 10 are heated and fluidized by frictional heat, and then cooled and integrated.

(Inflow stirring process)
Next, as shown in FIG. 4E, friction stir welding is performed on the upper surface (surface) 11 of the lid plate 10 along the lower groove 8. The inflow stirring step is a step of flowing the plastic fluidized material Q fluidized by friction stir welding into a gap P (see FIG. 3) formed around the heat medium pipe 16, and the friction stir welding Is performed using the inflow stirring rotary tool 25 (a known rotary tool). The inflow agitation rotating tool 25 is made of, for example, tool steel and has a shape equivalent to that of the joining rotating tool 20, and hangs down on a concentric shaft from the center of the cylindrical tool body 26 and its bottom surface 27. Pin 28. The inflow stirring rotary tool 25 is larger than the joining rotary tool 20. Specifically, when the inflow stirring rotary tool 25 is pushed into the upper surface 11 of the lid plate 10 to perform friction stir welding, the lower end portion of the pin 28 (the tip of the inflow stirring rotary tool 25) The thing of the magnitude | size which becomes lower than the bottom face 5c is employ | adopted.

In the friction stir welding in the inflow agitation step, the inflow agitation rotating tool 25 that rotates at a high speed is pushed on the upper surface (surface) 11 of the lid plate 10, and the inflow agitation rotation tool 25 is moved along the lower groove 8. The inflow stirring rotary tool 25 is arranged so that a part of the projected portion of the bottom surface 27 (shoulder) of the tool body 26 overlaps the gap P of the heat medium pipe 16. At this time, the tip of the inflow agitation rotating tool 25 is inserted deeper than the bottom surface 5c of the lid groove 6, and the aluminum alloy material of the surrounding lid plate 10 and the base member 2 is caused by frictional heat by the pin 28 rotating at high speed. Is heated and fluidized. The inflow stirring rotary tool 25 is pushed so that the bottom surface 27 of the tool body 26 is lower than the top surface 11 of the cover plate 10. The pushing amount (length) is determined by the volume of the plastic fluidized aluminum alloy material in which the volume of the metal of the lid body 10 from which the tool body 26 is pushed back is filled in one of the gaps P around the heat medium pipe 16. And a length equivalent to the sum of the volume of burrs generated on both sides in the width direction of the plasticized region W ₃ (W ₄ ). Then, the fluidized plastic fluid material Q is pushed out and flows into the gap P by the pushing force of the bottom surface 27 of the tool body 26 of the inflow stirring rotary tool 25. After the friction stir welding in the inflow stirring step, burrs generated on both sides in the width direction of the plasticized regions W ₃ and W ₄ are removed. The friction stir welding is performed on both sides of the concave groove 8 in the width direction, and the plastic fluid material Q flows into the pair of gap portions P ₁ and P ₂ located above the heat medium pipe 16.

According to the heat transfer plate manufacturing method described above, as shown in FIG. 4F, the plasticized regions W ₁ and W ₂ are formed along the butted portions V ₁ and V ₂ , and the base member 2 is formed. On the other hand, plasticized regions W ₃ and W ₄ are formed along the concave groove 8 on the upper surface 11 of the cover plate 10, and the heat medium tube 16 is formed by the base member 2 and the cover plate 10. Is sealed. Furthermore, since the plastic fluid material Q flows into the gap P and fills the gap P, the heat medium pipe 16 and the base member 2 and the cover plate 10 are in close contact with each other without any gap, so that the heat exchange efficiency High heat transfer plate 1 can be formed.

  Furthermore, according to this embodiment, since the lid plate 10 is joined to the base member 2 using the relatively small joining rotary tool 20, the lid plate 10 is securely fixed in the inflow stirring step. In this state, friction stir welding can be performed. Therefore, the friction stir welding that requires a large pushing force using the relatively large inflow stirring rotary tool 25 can be performed in a stable state.

  In this embodiment, the inflow stirring process is performed after the joining process, but the joining process may be performed after the inflow stirring process. At this time, if the cover plate 10 is fixed from the longitudinal direction using a jig (not shown), the width direction of the cover plate 10 is fixed by the base member 2, so that the friction stir welding in the inflow stirring step is performed. It can be applied in a state where the lid plate 10 is securely fixed.

In the present embodiment, the friction stir welding is performed over the entire length of the abutting portions V ₁ and V _{2 in} the joining step, but the present invention is not limited to this, and the abutting portions V ₁ and V ₂ are applied to the abutting portions V ₁ and V ₂ . The base plate 2 may be temporarily attached to the base member 2 by intermittently performing friction stir welding at predetermined intervals along the same. According to such a method for manufacturing a heat transfer plate, the inflow stirring step can be performed in a state where the lid plate 10 is securely fixed while reducing the labor and time required for the joining step, and the above-described operation and effects can be achieved. Similarly, a heat transfer plate having a good processing environment and high accuracy can be manufactured.

FIG. 5 is a plan view showing a heat transfer unit using the heat transfer plate according to the first embodiment.
For example, as shown in FIG. 5, the heat transfer plate 1 is used by connecting a plurality of heat transfer plates 1 to form a heat transfer unit 90. The heat transfer unit 90 includes a plurality of heat transfer plates 1 arranged in parallel in the short direction of the base member 2, and the heat medium pipes 16 protruding from both ends in the longitudinal direction of the base members 2 are connected in a U shape in plan view. It is formed by connecting with a pipe 91. According to such a heat transfer unit 90, since one heat medium pipe 96 is formed, the heat medium is circulated through the heat medium pipe 96, whereby the base member 2 and the lid plate 10 are connected. An object (not shown) in contact with or in close proximity can be quickly cooled or heated.

  In addition, the connection method of the heat exchanger plate 1 is an example, and you may form a heat transfer unit with another connection method. Further, in the heat transfer unit 90, the connection pipe 91 is exposed to the outside of the heat transfer plate 1, but the heat medium pipe 16 is formed in an S shape so that the heat medium pipe 16 is the heat transfer plate 1. You may form so that it may fit inside.

  Furthermore, in this embodiment, although the several heat exchanger plate 1 is connected via the connection pipe 91 and the heat transfer unit 90 is formed, it is not restricted to this. For example, as shown in FIG. 6, a lid groove 53 having a plurality of concave grooves 8, 8,... Is formed in one base member 51, and a single lid plate 54 is joined to a rotating tool (not shown). By fixing the rotating tool for inflow stirring (not shown) from the upper surface (front surface) 55 of the cover plate 54 along the concave grooves 8, the gap portion of the heat medium pipe 16 is fixed to the base member 51. The plastic fluid material Q may be allowed to flow into P. In this way, it is possible to fix the plurality of heat medium tubes 16, 16,... By performing the joining process of the lid plate 54 only once.

[Second Embodiment]
Next, the heat transfer plate according to the second embodiment will be described. FIG. 7 is a perspective view showing a heat transfer plate according to the second embodiment. FIG. 8 is a cross-sectional view showing a heat transfer plate according to the second embodiment.

As shown in FIGS. 7 and 8, in the heat transfer plate 31 according to the second embodiment, the cover plate 32 and the cover groove 35 of the base member 34 are formed to be narrower than in the first embodiment. . Specifically, the plasticized region W _{3 in which} the butted portions V ₃ and V ₄ between the side surface 33 of the cover plate 32 and the side wall 36 of the cover groove 35 of the base member 34 are generated by friction stir welding in the inflow stirring process. , as contained in the _{W 4,} a cover plate 32, the width of Futamizo 35 of the base member 34 is fixed. That is, the plasticized region W _1, W ₂ above produced by bonding step, the rotation tool 25 is inflow stirring moves in the inflow stirring process, plasticized region W _1, W ₂ is adapted to be re-agitated Yes. The inflow stirring rotary tool 25 is the same as that of the first embodiment. Since other configurations are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.

Next, the manufacturing method of the heat exchanger plate which concerns on 2nd embodiment is demonstrated. The heat transfer plate manufacturing method of the present embodiment also includes an end mill process and a cutting process for forming the base member 34, an insertion process for inserting the heat medium pipe 16 into the concave groove 8 formed in the base member 34, and a lid groove. 35, a lid groove closing step for placing the lid plate 32 on 35, a joining step for moving the joining rotary tool (not shown) along the abutting portions V ₃ and V ₄ to perform friction stir welding, A plastic fluidized material fluidized by frictional heat in a gap P formed around the heat medium pipe 16 by moving the inflow stirring rotary tool 25 (see FIG. 8) along the concave groove 8 on the surface. An inflow agitation step for allowing Q to flow in.

  The end mill process, the cutting process, the insertion process, and the lid groove closing process are the same as those in the first embodiment except for the configuration in which the lid plate 32 and the lid groove 35 of the base member 34 are narrow.

In the joining process, as shown in FIG. 7 and FIG. 8A, friction stir welding is intermittently performed at predetermined intervals along the butted portions V ₃ and V ₄ to form a plasticized region W _{1 in a} broken line shape. , W ₂ , and the cover plate 32 is temporarily fixed to the base member 34. The joining rotary tool (not shown) used at this time is the same as the joining rotary tool 20 of the first embodiment, and is smaller than the inflow stirring rotary tool 25.

  Next, as shown in FIG. 8B, friction stir welding is performed on the upper surface (surface) 11 of the cover plate 10 along the lower groove 8. As in the first embodiment, the inflow stirring step is a step of flowing the plastic fluid material Q fluidized by friction stir welding into the void portion P formed around the heat medium pipe 16. The friction stir welding is performed using an inflow stirring rotary tool 25 (a known rotary tool).

In the friction stir welding in the inflow agitation step, the inflow agitation rotating tool 25 that rotates at a high speed is pushed on the upper surface (surface) 11 of the lid plate 10, and the inflow agitation rotation tool 25 is moved along the lower groove 8. In the inflow agitation rotating tool 25, a part of the projected portion of the bottom surface 27 (shoulder) of the tool body 26 is a gap P of the heat medium pipe 16 and a plasticized region W ₁ (W ₂ ) generated in the joining step. It is arranged so as to overlap. At this time, the tip of the inflow agitation rotating tool 25 is inserted deeper than the bottom surface 5c of the lid groove 6, and the aluminum alloy material of the surrounding lid plate 10 and the base member 2 is caused by frictional heat by the pin 28 rotating at high speed. The plastic fluidized material Q heated and fluidized by the above and fluidized is pushed into the gap P by the pushing force of the bottom surface 27 of the tool body 26 of the inflow stirring rotary tool 25 and flows in. At the same time, the plasticized region W ₁ (W ₂ ) is included in the plasticized region W ₃ (W ₄ ) generated by the inflow stirring rotary tool 25 and is re-stirred.

According to the method of manufacturing a heat transfer plate as described above, it is possible to perform stable inflow stirring process in a state of fixing the lid plate 10 to the base member 2, as shown in FIG. 7, the butt portion V _3, Plasticization regions W ₃ and W ₄ are formed along V ₄ (see FIG. 8A), the heat medium pipe 16 is sealed by the base member 2 and the cover plate 10, and further, the plasticization region is formed. W ₃ and W ₄ include plasticized regions W ₁ and W ₂ , and the base member 2 and the cover plate 10 are joined. As described above, since the plasticization regions W ₁ and W ₂ are re-stirred by the inflow stirring rotary tool 25 and are included in the plasticization regions W ₃ and W ₄ , the plasticization regions exposed to the surface of the heat transfer plate 1. Can be reduced.

In the present embodiment, in the joining step, the friction stir welding is intermittently performed along the abutting portions V ₃ and V ₄ to temporarily attach the cover plate 32 to the base member 34. The joining of the member 34 and the cover plate 32 is not limited to the temporary attachment, and the friction stir welding may be performed over the entire length of the butt portions V ₃ and V ₄ . As described above, when the friction stir welding is performed over the entire length of the abutting portions V ₃ and V ₄ , the inflow stirring step can be performed in a state where the lid plate 10 is more securely fixed.

[Third embodiment]
Next, the heat transfer plate according to the third embodiment will be described. FIG. 9A is an exploded cross-sectional view showing the heat transfer plate according to the third embodiment, and FIG. 9B is a cross-sectional view showing the heat transfer plate according to the third embodiment.

  The heat transfer plate 61 according to the third embodiment includes a structure substantially equivalent to the above-described heat transfer plate 1, further disposes the upper cover plate 70 on the surface side of the cover plate 10, and performs friction stir welding. It is different from the first embodiment in that it is joined.

  In addition, the structure equivalent to the above-described heat transfer plate 1 is also referred to as a lower lid portion M below. Moreover, about the member which overlaps with the heat exchanger plate 1 which concerns on 1st embodiment, an equivalent code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

The heat transfer plate 61 includes a base member 62, a heat medium pipe 16 inserted into the groove 8, the lid plate 10, and an upper lid plate 70 disposed on the surface side of the lid plate 10, and is plastic. The integrated regions W _{1 to} W ₆ are integrated by friction stir welding.

As shown in FIGS. 9A and 9B, the base member 62 is made of, for example, an aluminum alloy, and has an upper lid groove 64 formed on the surface 63 of the base member 62 in the longitudinal direction, and an upper lid groove 64. The cover groove 6 is formed continuously on the bottom surface of the cover groove 6 in the longitudinal direction, and the concave groove 8 is formed on the bottom surface of the cover groove 6 in the longitudinal direction. The upper lid groove 64 has a rectangular shape in cross section and includes side walls 65a and 65b that rise vertically from the bottom surface. The width of the upper lid groove 64 is formed larger than the width of the lid groove 6. The bottom surface 65c of the upper lid groove 64 is chamfered after the plasticized regions W ₃ and W ₄ are generated, and is flush with the surfaces of the plasticized regions W ₃ and W ₄ .

A heat medium pipe 16 is inserted into the groove 8 formed in the lower part of the base member 62, is closed by the cover plate 10, and is joined at the plasticized regions W ₁ and W ₂ by friction stir welding. Plasticization regions W ₃ and W ₄ are formed from the surface of the lid plate 10 to the lower side of the bottom surface 5c of the lid groove 6 so that the plastic fluid material Q is placed in the voids P ₁ and P ₂ around the heat medium pipe 16. Inflow. In other words, the lower lid portion M formed inside the base member 62 is formed substantially the same except for the portion that is chamfered with the heat transfer plate 1 according to the first embodiment.

As shown in FIGS. 9A and 9B, the upper lid plate 70 is made of, for example, an aluminum alloy, has a rectangular cross section substantially the same as the cross section of the upper lid groove 64, and includes an upper surface 71, a lower surface 72, A side surface 73 a and a side surface 73 b are formed perpendicularly from the lower surface 72. The upper lid plate 70 is fitted in the upper lid groove 64. That is, the side surfaces 73 a and 73 b of the upper lid plate 70 are in surface contact with the side walls 65 a and 65 b of the upper lid groove 64 or are arranged with a fine gap. Here, below the abutting faces of the side surface 73a and the side wall 65a, and an upper butt portion _{V 5,} following the abutting faces of the side face 73b and the sidewall 65b, and upper butt portion _{V 6.} The upper butt portions V ₅ and V ₆ are integrated in the plasticized regions W ₅ and W ₆ by friction stir welding.

The heat transfer plate 61 is manufactured by the same manufacturing method as that of the heat transfer plate 1, after forming the lower cover portion M below the base member 62, the upper cover groove closing step of placing the upper cover plate 70, It includes an upper lid joining step in which friction stir welding is performed along the parts V ₅ and V ₆ .

In the upper lid groove closing step, after the lower lid portion M is formed, the upper lid plate 70 is disposed in the upper lid groove 64. In this case, the bottom surface 65c of the upper lid groove 64, the upper surface of the lid plate 10 and the plasticized region _W 1 to _W-4, since not planar with the above-described bonding step (is uneven), the bottom surface 65c of the upper lid groove 64, the cover plate 10 and a chamfering process for flattening the upper surfaces of the plasticized regions W _{1 to} W ₄ (see the broken line portion in FIG. 9A).

In the upper lid joining process, the joining rotary tool (not shown) is moved along the upper abutting portions V ₅ and V ₆ to perform friction stir welding. What is necessary is just to set suitably the embedding depth of the rotation tool for joining in an upper cover joining process according to various conditions, such as the length of a pin and the thickness of the upper cover board 70. FIG.

  According to the heat transfer plate 61 according to the embodiment, the upper cover plate 70 is further disposed above the lower cover portion M, and the heat medium pipe 16 is disposed at a deeper position by performing friction stir welding. Can do.

  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, in the above-described embodiment, the cover plates 10, 32, 55 and the upper cover plate 70 are disposed on the upper surface side of the base members 2, 34, 51, 62, but may be disposed on the lower surface side.

  In the above-described embodiment, the inflow agitation rotating tool 25 used in the inflow agitation process is larger than the joining rotation tool 20 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 an exploded sectional view showing the heat exchanger plate concerning a first embodiment. 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, (a) is the figure which showed the end mill process and the cutting process, (b) is the insertion process which inserted the pipe. (C) is a diagram showing a closing step, (d) is a diagram showing a joining step, (e) is a diagram showing an inflow stirring step, ( f) is a completed drawing. It is the top view which showed the heat-transfer unit using the heat-transfer board which concerns on 1st embodiment. It is sectional drawing which showed the modification of the heat exchanger plate. It is the perspective view which showed the heat exchanger plate which concerns on 2nd embodiment. It is sectional drawing which showed the manufacturing method of the heat exchanger plate which concerns on 2nd embodiment, Comprising: (a) is the figure which showed the state before pushing in of the rotation tool for inflow stirring of an inflow stirring process, (b), It is the figure which showed the state in pushing in of the rotation tool for inflow stirring of an inflow stirring process. It is the figure which showed the heat exchanger plate which concerns on 3rd embodiment, Comprising: (a) is an exploded sectional view, (b) is sectional drawing. It is the figure which showed the conventional heat exchanger plate, (a) is a perspective view, (b) is sectional drawing.

DESCRIPTION OF SYMBOLS 1 Heat-transfer plate 2 Base member 5a Side wall of lid groove 5b Side wall of lid groove 5c Bottom surface of lid groove 6 Lid groove 8 Concave groove 10 Lid plate 11 Upper surface of lid plate 11
13a (Cover plate) side surface 13b (Cover plate) side surface 16 Heat medium tube 20 Joining rotary tool 25 Inflow stirring rotary tool 31 Heat transfer plate 32 Cover plate 33 (Cover plate) side surface 34 Base member 35 Cover groove 36 Side wall 51 (of the lid groove) 51 Base member 53 Lid groove 54 Lid plate 61 Heat transfer plate 62 Base member 64 Upper lid groove 65a Side wall 65b (of the upper lid groove) Side wall 70 Upper lid plate 73a (of the upper lid plate) ) Side surface 73b Side surface (on top cover plate) P Void part Q Plastic fluidized material V Butt part W Plasticization region

Claims (7)

An insertion step of inserting the heat medium pipe into the concave groove formed on the bottom surface of the lid groove opening on the surface side of the base member;
A lid groove closing step of disposing a lid plate in the lid groove;
On the surface of the lid plate, the inflow agitating rotary tool is moved along the concave groove to flow the plastic fluidized material fluidized by frictional heat into the gap formed around the heat medium pipe. A heat transfer plate manufacturing method, comprising: an inflow stirring step. Before the inflow stirring step,
The method further comprises a joining step of moving the joining rotary tool along the abutting portion between the side wall of the lid groove and the side surface of the lid plate to perform friction stir welding between the base member and the lid plate. The manufacturing method of the heat exchanger plate of Claim 1. The temporary joining of the said cover plate which performs friction stir welding intermittently along the abutting part of the side wall of the said cover groove | channel and the side surface of the said cover plate is given in the said joining process. Manufacturing method of heat transfer plate. The method for manufacturing a heat transfer plate according to any one of claims 2 to 3, wherein the inflow agitation rotating tool is larger than the joining rotating tool. 5. The heat transfer plate according to claim 1, wherein, in the inflow stirring step, a tip of the inflow stirring rotating tool is inserted deeper than a bottom surface of the lid groove. Production method. The heat transfer according to any one of claims 2 to 5, wherein, in the inflow stirring step, the plasticized region generated in the joining step is re-stirred by the inflow stirring rotating tool. A manufacturing method of a board. After the inflow stirring joining step,
An upper lid groove closing step of disposing an upper lid plate that covers the lid plate in an upper lid groove formed wider than the lid groove on the surface side of the base member than the lid groove;
An upper lid joining step of moving the joining rotary tool along the upper abutting portion between the side wall of the upper lid groove and the side surface of the upper lid plate to perform friction stir welding between the base member and the upper lid plate; The method for manufacturing a heat transfer plate according to any one of claims 1 to 6, wherein the heat transfer plate is provided.

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