JP2014240706A - Heat transfer plate and manufacturing method thereof - Google Patents
Heat transfer plate and manufacturing method thereof Download PDFInfo
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Abstract
Description
本発明は、プレート状の金属板に内部空間が形成された伝熱板及びその製造方法に関する。 The present invention relates to a heat transfer plate in which an internal space is formed in a plate-shaped metal plate and a method for manufacturing the same.
熱交換、加熱、あるいは冷却すべき対象物に接触、または近接して配置される伝熱板は、例えば、伝熱板本体に凹溝を設けるとともに、その凹溝を上部から蓋板で覆い、凹溝周辺の伝熱板本体と蓋溝とを接合させることで、凹溝と前記蓋板との空間を熱媒体の流路としている。そして、例えば、対象物から熱を逃がす場合は、当該空間に熱媒体を流し、対象物から伝熱板本体、空間内を流れる媒体へと熱を伝達させることで対象物の熱を逃がしている。 A heat transfer plate arranged in contact with or close to an object to be heat exchanged, heated, or cooled, for example, is provided with a groove in the heat transfer plate body, and the groove is covered with a cover plate from above, By joining the heat transfer plate body and the cover groove around the recessed groove, the space between the recessed groove and the cover plate is used as a flow path for the heat medium. For example, when heat is released from the object, the heat medium is allowed to flow through the space, and heat is transferred from the object to the heat transfer plate body and the medium flowing through the space, thereby releasing the heat of the object. .
このような伝熱板の各部材は、ＴＩＧ溶接、ＭＩＧ溶接等のアーク溶接法や、電子ビーム溶接法などのレーザー溶接法等によって接合される（例えば、特許文献１）。特許文献１に開示された技術では、タングステン電極を使って母材との間にアークを発生させ、その熱で母材を溶かして接合するＴＩＧ溶接に関する技術である。 Each member of such a heat transfer plate is joined by an arc welding method such as TIG welding or MIG welding, or a laser welding method such as an electron beam welding method (for example, Patent Document 1). The technique disclosed in Patent Document 1 is a technique related to TIG welding in which an arc is generated between a base metal using a tungsten electrode and the base metal is melted and joined by the heat.
ところで、伝熱板の各部材は、熱伝達性が高い、例えばアルミニウムまたはその合金等で形成されるため、腐食が発生し易いという問題がある。ここで、金属部材の腐食を防止するために、金属部材の表面に陽極酸化皮膜を形成させるアルマイト処理という技術がある。 By the way, since each member of the heat transfer plate is formed of, for example, aluminum or an alloy thereof having high heat transfer, there is a problem that corrosion is likely to occur. Here, in order to prevent corrosion of the metal member, there is a technique called alumite treatment that forms an anodized film on the surface of the metal member.
しかしながら、陽極酸化皮膜が形成された伝熱板に対して、特許文献１に開示された技術で被接合材同士を溶融溶接すると、溶接部分に不純物が混入されてしまい、当該溶接部分の接合強度及び耐食性が低くなるという問題がある。 However, when the materials to be joined are melt welded to the heat transfer plate on which the anodized film is formed by the technique disclosed in Patent Document 1, impurities are mixed in the welded portion, and the joint strength of the welded portion is increased. In addition, there is a problem that the corrosion resistance is lowered.
一方、溶接工法にて接合後した後、アルマイト処理を行う場合には、伝熱板の内部空間に処理液を浸透させることができないため、流路表面の隅々まで陽極酸化皮膜を形成させることがでず、その結果、内部空間が腐食してしまうという問題がある。 On the other hand, when alumite treatment is performed after joining by the welding method, the treatment liquid cannot penetrate into the internal space of the heat transfer plate, so an anodic oxide film should be formed on every corner of the flow path surface. As a result, there is a problem that the internal space is corroded.
本発明は、このような従来の上記問題点に鑑みてなされたもので、熱媒体の流路としての内部空間全体に皮膜を形成させて高い耐食性を有するとともに、十分な接合強度を有する伝熱板、及びその製造方法を提供することを目的としている。 The present invention has been made in view of the above-described problems of the prior art, and has a high corrosion resistance by forming a film over the entire internal space as the flow path of the heat medium, and has a sufficient bonding strength. It aims at providing a board and its manufacturing method.
上記課題を解決するために、本発明は、所定の断面形状をなした蓋溝が形成されるとともに、当該蓋溝の底面に凹溝が設けられ、少なくとも凹溝内面の全部に皮膜が形成された伝熱板本体と、蓋溝と断面形状が同一であり、少なくとも凹溝に臨む面の全部に皮膜が形成された蓋板とを備え、蓋溝に蓋板が嵌合され、当該蓋溝及び当該蓋板の突き合わせ面に沿って摩擦撹拌接合されることにより、凹溝及び蓋板に囲まれた内部空間が形成され、内部空間は、凹溝及び蓋板に形成された被膜により覆われていることを特徴とする。 In order to solve the above-mentioned problems, the present invention has a lid groove having a predetermined cross-sectional shape, a concave groove is provided on the bottom surface of the lid groove, and a film is formed on at least the entire inner surface of the concave groove. A heat transfer plate main body, a cover groove having the same cross-sectional shape as that of the cover groove, and a cover plate having a film formed on at least the entire surface facing the concave groove, and the cover plate is fitted into the cover groove. And an internal space surrounded by the groove and the cover plate is formed by friction stir welding along the abutting surface of the cover plate, and the internal space is covered with a film formed on the groove and the cover plate. It is characterized by.
また、他の発明は、所定の断面形状をなした蓋溝が形成されるとともに、当該蓋溝の底面に凹溝が設けられた伝熱板本体と、蓋溝と断面形状が同一である蓋板とを備えた伝熱板の製造方法であって、
（１）伝熱板本体の少なくとも凹溝内面の全部に皮膜を形成するとともに、蓋板の少なくとも凹溝に臨む面の全部に皮膜を形成する被膜形成処理と
（２）蓋溝に蓋板を嵌合し、当該蓋溝及び当該蓋板の突き合わせ面に沿って摩擦撹拌接合する接合処理と
を有することを特徴とする。
In another invention, a lid groove having a predetermined cross-sectional shape is formed, and a heat transfer plate main body having a concave groove on the bottom surface of the lid groove, and a lid having the same cross-sectional shape as the lid groove. A heat transfer plate manufacturing method comprising a plate,
(1) A film forming process for forming a film on at least the entire inner surface of the concave groove of the heat transfer plate body, and forming a film on at least the entire surface of the cover plate facing the concave groove; and (2) a cover plate in the cover groove. And a joining process of friction stir welding along the abutting surfaces of the lid groove and the lid plate.
これらのような本発明によれば、伝熱板本体には少なくとも凹溝内面の全部に皮膜が形成され、蓋板には少なくとも凹溝に臨む面の全部に皮膜が形成されているので、伝熱板の蓋溝に蓋板を嵌合させて接合し、熱媒体の流路としての内部空間を形成させると、内部空間は、凹溝及び蓋板に形成された被膜により覆われることとなる。そのため、耐食性の高い内部空間を備える伝熱板を簡易に生成することができる。また、皮膜が形成された伝熱板本体と蓋板とを摩擦撹拌によって接合するため、接合部分に異物が混入することを防止することができる。 According to the present invention as described above, since the coating is formed on at least the entire inner surface of the concave groove on the heat transfer plate body, and the coating is formed on at least the entire surface facing the concave groove on the lid plate, When the lid plate is fitted and joined to the lid groove of the hot plate to form an internal space as a flow path for the heat medium, the internal space is covered with the coating formed on the concave groove and the lid plate. . Therefore, it is possible to easily generate a heat transfer plate having an internal space with high corrosion resistance. Further, since the heat transfer plate main body and the lid plate on which the film is formed are joined by friction stirring, it is possible to prevent foreign matters from being mixed into the joined portion.
上記発明において、摩擦撹拌接合により、蓋溝及び蓋板の突き合わせ面に形成された撹拌接合部の内部に、伝熱板本体又は蓋板の材質と、被膜の材質とが混ざり合った混合部が形成されていることが好ましい。ここで、混合部としては、例えば、伝熱板本体及び蓋板の表面付近に、表面に沿って形成された水平方向混合部や、伝熱板本体及び蓋板の表面付近から、撹拌接合部の深さ方向にわたって形成された垂直方向混合部のほか、水平方向混合部と垂直方向混合部とが連結された形状のものも含まれる。 In the above invention, a mixing portion in which the material of the heat transfer plate main body or the cover plate and the material of the coating are mixed inside the stirring joint formed on the butting surface of the cover groove and the cover plate by friction stir welding. Preferably it is formed. Here, as the mixing unit, for example, in the vicinity of the surface of the heat transfer plate main body and the cover plate, the horizontal direction mixing unit formed along the surface, or from the vicinity of the surface of the heat transfer plate main body and the cover plate, the stirring joint portion In addition to the vertical direction mixing portion formed over the depth direction, a shape in which the horizontal direction mixing portion and the vertical direction mixing portion are connected is also included.
この場合には、撹拌接合部の内部に、伝熱板本体又は蓋板の材質と、被膜の材質とが撹拌されて混ざり合った混合部が形成されるため、被膜の影響を伝熱板本体の素材中に分散させることができ、耐食性を高めつつ、被膜処理によって接合強度が低下するのを抑制することができる。 In this case, since the mixing part in which the material of the heat transfer plate main body or the cover plate and the material of the coating are agitated and mixed is formed inside the stirring joint, the influence of the coating is influenced by the heat transfer plate main body. It is possible to disperse in the material, and it is possible to suppress a decrease in the bonding strength due to the coating treatment while improving the corrosion resistance.
上記発明において、伝熱板本体及び蓋板の表面において、撹拌接合部に対応した箇所に形成された凹部である押込凹部を有することが好ましい。この場合には、伝熱板本体及び蓋板の表面に窪んだ押込凹部を形成することによって、伝熱板本体及び蓋板の表面に形成される被膜の材質を含んだ素材を削除することができるため、より伝熱板の接合強度の低下を抑制することができる。 In the said invention, it is preferable to have the pressing recessed part which is a recessed part formed in the location corresponding to a stirring junction part in the surface of a heat exchanger plate main body and a cover board. In this case, the material including the material of the coating formed on the surfaces of the heat transfer plate main body and the cover plate may be deleted by forming a depression recess depressed on the surfaces of the heat transfer plate main body and the cover plate. Since it can do, the fall of the joint strength of a heat exchanger plate can be suppressed more.
以上述べたように、この発明によれば、予め被膜で被覆した各部材を摩擦撹拌接合により接合することで、熱媒体の流路としての内部空間全体の隅々にわたって皮膜を形成させることができ、内部空間部分であっても高い耐食性を得られるとともに、各部材を接合する際に異物が混入することを回避し、十分な接合強度を得ることができる。 As described above, according to the present invention, it is possible to form a film over every corner of the entire internal space as the flow path of the heat medium by joining the members previously coated with the film by friction stir welding. And even if it is an internal space part, while being able to obtain high corrosion resistance, it can avoid that a foreign material mixes in joining each member, and can obtain sufficient joining strength.
以下に添付図面を参照して、本発明に係る伝熱板、及びその製造方法の実施形態を詳細に説明する。図１（ａ）は、本実施形態に係る伝熱板と摩擦撹拌用治具とを示す斜視図であり、同図（ｂ）は、同図（ａ）のＡ−Ａ’断面図である。図２（ａ）は、本実施形態に係る蓋板を示す斜視図であり、同図（ｂ）は、実施形態に係る伝熱板本体を示す斜視図である。また、図３は、本実施形態に係る伝熱板本体を示す模式断面図であり、図４は、本実施形態に係る蓋板及び伝熱板本体に形成された陽極酸化皮膜を示す模式断面図である。 Embodiments of a heat transfer plate and a method for manufacturing the same according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1A is a perspective view showing a heat transfer plate and a friction stirrer according to this embodiment, and FIG. 1B is a cross-sectional view taken along line AA ′ of FIG. . FIG. 2A is a perspective view showing a lid plate according to the present embodiment, and FIG. 2B is a perspective view showing a heat transfer plate body according to the embodiment. 3 is a schematic cross-sectional view showing the heat transfer plate main body according to the present embodiment, and FIG. 4 is a schematic cross-sectional view showing the anodized film formed on the lid plate and the heat transfer plate main body according to the present embodiment. FIG.
（伝熱板の全体構成）
図１（ａ）及び（ｂ）に示すように、プレート状の伝熱板１０は、伝熱板本体１に蓋板２を嵌合させた状態で、摩擦撹拌用装置５を伝熱板１０の表面に沿って所定の回転数および移動速度で相対的に移動させることで、伝熱板１０の素材を流動させて形成された撹拌接合部３と、伝熱板１０の内部において、略Ｕ字状の内部空間４とを形成させるものである。
(Overall structure of heat transfer plate)
As shown in FIGS. 1A and 1B, the plate-like heat transfer plate 10 has the friction stirrer 5 in the state where the cover plate 2 is fitted to the heat transfer plate body 1. In the inside of the heat transfer plate 10, the stirring joint 3 formed by causing the material of the heat transfer plate 10 to flow by being relatively moved along the surface of the heat transfer plate 10 at a predetermined rotational speed and moving speed is approximately U. A character-shaped internal space 4 is formed.
伝熱板本体１は、胴、アルミニウムや、これらの合金等、熱伝達性の高い金属材料から形成されている。この伝熱板１０は、摩擦撹拌の摩擦熱によって軟化され、材料が塑性流動することができる部材であれば特に制限されない。この伝熱板本体１は、図２（ｂ）に示すように、一方の面に開口する、長手方向に略Ｕ字状の蓋溝１２が形成されており、この蓋溝１２部分に蓋板２が嵌合されるようになっている。この蓋溝１２は、図３に示すように、両側面１２ａ，１２ａと底面１２ｂとによって形成され、断面形状が略矩形をなしている。また、この蓋溝１２の底面２ｂの略中央には、凹溝１１が設けられている。具体的に、凹溝１１は、所定の深さを有する両側面１１ａ，１１ａ及び底面１１ｂによって形成され、断面形状が略矩形をなしている。 The heat transfer plate body 1 is formed of a metal material having high heat transfer properties such as a trunk, aluminum, and alloys thereof. The heat transfer plate 10 is not particularly limited as long as it is a member that can be softened by frictional heat of friction stirring and the material can plastically flow. As shown in FIG. 2B, the heat transfer plate main body 1 is formed with a substantially U-shaped lid groove 12 in the longitudinal direction that opens on one surface, and a lid plate is formed in the lid groove 12 portion. 2 is fitted. As shown in FIG. 3, the lid groove 12 is formed by both side surfaces 12a, 12a and a bottom surface 12b, and has a substantially rectangular cross-sectional shape. A concave groove 11 is provided in the approximate center of the bottom surface 2 b of the lid groove 12. Specifically, the groove 11 is formed by both side surfaces 11a, 11a and a bottom surface 11b having a predetermined depth, and the cross-sectional shape is substantially rectangular.
蓋板２は、伝熱板本体１と同様、胴、アルミニウムや、これらの合金等、熱伝達性の高い金属材料から形成されている。この蓋板２は、蓋溝１２と同一形状である略Ｕ字状をなし、また、断面形状についても蓋溝１２と同一に形成されている。この蓋板２は、図１（ｂ）に示すように、蓋板２の両側面２ａ，２ａと、蓋溝１２の両側面１２ａ，１２ａとが突き合わされ、また、蓋板２の底面２ｂと、蓋溝１２の底面１２ｂとが突き合わされて、蓋溝１２に嵌合される。 The cover plate 2 is formed of a metal material having high heat transfer properties, such as a trunk, aluminum, or an alloy thereof, like the heat transfer plate main body 1. The lid plate 2 has a substantially U shape, which is the same shape as the lid groove 12, and is formed in the same manner as the lid groove 12 in terms of cross-sectional shape. As shown in FIG. 1 (b), the lid plate 2 has both side surfaces 2 a and 2 a of the lid plate 2 abutted against both side surfaces 12 a and 12 a of the lid groove 12, and a bottom surface 2 b of the lid plate 2. The bottom surface 12 b of the lid groove 12 is abutted and fitted into the lid groove 12.
そして、伝熱板本体１の蓋溝１２の両側面１２ａ，１２ａと、蓋溝１２に嵌合した蓋板２の両側面２ａ，２ａとの突き合わせ面に沿って、摩擦攪拌接合による撹拌接合部３が個別に形成されている。係る撹拌接合部３は、伝熱板本体１および蓋板２の金属材料を、後述する摩擦撹拌用装置５を用いて摩擦熱により固相状態で流動化しつつ攪拌して一体化させたものである。このように、凹溝１１が蓋板２で覆われた状態で摩擦撹拌用装置５によって、突き合わせ面に沿って摩擦撹拌接合されることにより、凹溝１１及び蓋板２に囲まれた部分が熱媒体の流路としての内部空間４として形成される。 Then, along the abutting surface between the both side surfaces 12a, 12a of the lid groove 12 of the heat transfer plate body 1 and the both side surfaces 2a, 2a of the lid plate 2 fitted in the lid groove 12, the agitation junction by friction agitation welding 3 are individually formed. The stirring joint portion 3 is obtained by stirring and integrating the metal materials of the heat transfer plate body 1 and the cover plate 2 while fluidizing in a solid phase state by frictional heat using a friction stirring device 5 described later. is there. In this way, the friction stir device 5 is friction stir welded along the abutting surface with the concave groove 11 covered with the lid plate 2, so that the portion surrounded by the concave groove 11 and the lid plate 2 is It is formed as an internal space 4 as a heat medium flow path.
また、伝熱板本体１と蓋板２とは、図４に示すように、全面に陽極酸化皮膜１５が形成されており、内部空間４についても、凹溝１１及び蓋板２に形成された陽極酸化皮膜１５により覆われている。この陽極酸化皮膜１５は、アルマイト処理によって形成される。なお、本実施形態においては、伝熱板本体１及び蓋板２の全面に陽極酸化皮膜１５を形成させたが、本発明はこれに限定するものではなく、伝熱板本体１では、少なくとも凹溝１１内面の全部に陽極酸化皮膜１５が形成され、蓋板２では、少なくとも凹溝１１に臨む面の全部に陽極酸化皮膜１５が形成されていればよいものとする。 Further, as shown in FIG. 4, the heat transfer plate body 1 and the cover plate 2 have an anodized film 15 formed on the entire surface, and the inner space 4 is also formed in the concave groove 11 and the cover plate 2. It is covered with an anodized film 15. This anodized film 15 is formed by an alumite treatment. In the present embodiment, the anodic oxide film 15 is formed on the entire surface of the heat transfer plate main body 1 and the cover plate 2. However, the present invention is not limited to this, and the heat transfer plate main body 1 is at least concave. It is assumed that the anodic oxide film 15 is formed on the entire inner surface of the groove 11 and that the cover plate 2 has the anodic oxide film 15 formed on at least the entire surface facing the concave groove 11.
摩擦撹拌用装置５は、耐熱、耐摩耗性が高い部材で形成され、図２に示すように、円柱状の基台５１と、基台５１の回転軸ＣＬと同軸上に突出されたプローブ５２とを備えている。本実施形態では、プローブ５２の径は、基台５１の径より小さく、大径の基台５１の先端に小径のプローブ５２を同軸ＣＬ上に設けた段付き形状となっており、基台５１のプローブ側は、伝熱板１０の表面を押えるショルダー部５１ａとなっている。 The friction stir apparatus 5 is formed of a member having high heat resistance and wear resistance, and as shown in FIG. 2, a columnar base 51 and a probe 52 protruding coaxially with the rotation axis CL of the base 51. And. In the present embodiment, the diameter of the probe 52 is smaller than the diameter of the base 51, and has a stepped shape in which a small diameter probe 52 is provided on the coaxial CL at the tip of the large diameter base 51. The probe side is a shoulder portion 51 a that presses the surface of the heat transfer plate 10.
プローブ５２は、全体が伝熱板１０に埋入した状態で、先端が伝熱板１０の底を突き抜けないような長さに設定され、先端側の径と基台側の径とが等しく略円柱状となっている。 The probe 52 is set in such a length that the entire tip is embedded in the heat transfer plate 10 so that the tip does not penetrate the bottom of the heat transfer plate 10, and the tip side diameter and the base side diameter are substantially equal. It is cylindrical.
そして、このプローブ５２には、外周面において螺旋状のねじ溝５２ａが設けられている。本実施形態において、このねじ溝５２ａの螺旋は、図２に示すように、側面から見た状態で、ねじ溝５２ａが右上から左下に向かうような右巻き（右ねじ）に形成されている。 The probe 52 is provided with a helical thread groove 52a on the outer peripheral surface. In the present embodiment, as shown in FIG. 2, the spiral of the thread groove 52a is formed in a right-handed manner (right thread) such that the thread groove 52a is directed from the upper right to the lower left as viewed from the side.
本実施形態では、図５（ａ）及び（ｂ）に示すように、蓋溝１２を形成する側面１２ａと凹溝１１を形成する側面１１ａとの間隔ｄ１は、プローブ５２のねじ溝５２ａを形成する一対の凸部５２ｂ．５２ｂの間隔ｄ２の１．１倍乃至３倍の範囲になるように設定されている。なお、摩擦撹拌用装置５には、図示していないが、基台５１及びプローブ５２を駆動させる駆動手段を備えている。この駆動手段は、基台５１及びプローブ５２を昇降移動させたり、基台５１及びプローブ５２を回転させつつ、伝熱板１０の面上に沿って平行移動させたりするようなっている。 In this embodiment, as shown in FIGS. 5A and 5B, the distance d1 between the side surface 12a that forms the cover groove 12 and the side surface 11a that forms the concave groove 11 forms the thread groove 52a of the probe 52. A pair of convex portions 52b. It is set to be in a range of 1.1 to 3 times the interval d2 of 52b. Although not shown, the friction stir apparatus 5 includes a driving unit that drives the base 51 and the probe 52. This driving means moves the base 51 and the probe 52 up and down, or translates the base 51 and the probe 52 along the surface of the heat transfer plate 10 while rotating the base 51 and the probe 52.
そして、この摩擦撹拌用装置５によって、蓋溝１２及び蓋板２の突き合わせ面を摩擦撹拌接合することにより、この突き合わせ面に形成された撹拌接合部３の内部に、伝熱板本体１又は蓋板２の材質と、陽極酸化皮膜１５の材質とが混ざり合った混合部３０（３０ａ又は３０ｂ）を形成させる。図７（ａ）は、本実施形態に係る摩擦撹拌用装置５が蓋溝１２及び蓋板２に埋入された状態を示す要部側面図であり、同図（ｂ）は、摩擦撹拌接合により形成された撹拌接合部３の状態を示す断面図である。図８（ａ）は、本実施形態に係る摩擦撹拌用装置５が蓋溝１２及び蓋板２に埋入された状態を示す要部側面図であり、同図（ｂ）は、摩擦撹拌接合により形成された撹拌接合部３の状態を示す断面図である。 And by this friction stirrer 5, the abutting surfaces of the lid groove 12 and the lid plate 2 are friction stir welded, so that the heat transfer plate body 1 or lid is placed inside the agitation joint 3 formed on the abutting surface. A mixing portion 30 (30a or 30b) in which the material of the plate 2 and the material of the anodized film 15 are mixed is formed. FIG. 7A is a side view of a main part showing a state in which the friction stirrer 5 according to the present embodiment is embedded in the lid groove 12 and the lid plate 2, and FIG. It is sectional drawing which shows the state of the stirring junction part 3 formed by these. FIG. 8A is a side view of an essential part showing a state in which the friction stirrer 5 according to the present embodiment is embedded in the lid groove 12 and the lid plate 2, and FIG. It is sectional drawing which shows the state of the stirring junction part 3 formed by these.
本実施形態において、撹拌接合部３の内部に形成される混合部３０は、伝熱板本体１及び蓋板２に対するショルダー部５１ａの押込量によって、異なる形状に形成される。本実施形態では、プローブ５２の長さに対するショルダー部５１ａの押込量の割合で示すものとする。この押込量の割合Ｒ（％）は、プローブ５２の長さをＤとし、伝熱板本体１及び蓋板２内部に押し込まれたショルダー部５１ａの深さ（陽極酸化皮膜１５の厚みを含むものとする）をΔｄとすると、
Ｒ（％）＝Δｄ／Ｄ×１００
で表される。
In this embodiment, the mixing part 30 formed in the inside of the stirring joint part 3 is formed in a different shape according to the pushing amount of the shoulder part 51a with respect to the heat-transfer plate main body 1 and the cover plate 2. FIG. In the present embodiment, it is indicated by the ratio of the pushing amount of the shoulder portion 51a to the length of the probe 52. The ratio R (%) of the push-in amount includes the length of the probe 52 as D, and includes the depth of the shoulder portion 51a pushed into the heat transfer plate body 1 and the cover plate 2 (the thickness of the anodized film 15). ) Is Δd,
R (%) = Δd / D × 100
It is represented by
この際、押込量の割合Ｒが０％以上〜５％未満の範囲内となるように、ショルダー部５１ａを伝熱板本体１及び蓋板２に浅く押し込んで摩擦撹拌接合させると、図７（ｂ）に示すような混合部３０ａが形成される。この混合部３０ａは、伝熱板本体１及び蓋板２の表面付近に、表面に沿って形成された水平方向混合部３１と、伝熱板本体１及び蓋板２の表面付近から、撹拌接合部３の深さ方向にわたって形成された垂直方向混合部３２とが連続して形成されたものである。 At this time, when the shoulder portion 51a is shallowly pushed into the heat transfer plate body 1 and the cover plate 2 so that the ratio R of the push amount is in the range of 0% to less than 5%, the friction stir welding is performed as shown in FIG. A mixing part 30a as shown in b) is formed. The mixing unit 30a is mixed in the vicinity of the surfaces of the heat transfer plate main body 1 and the cover plate 2 from the horizontal direction mixing unit 31 formed along the surface and from the vicinity of the surfaces of the heat transfer plate main body 1 and the cover plate 2. The vertical direction mixing part 32 formed over the depth direction of the part 3 is formed continuously.
詳述すると、図７（ｂ）に示す混合部３０ａは、蓋溝１２の側面と、蓋板２の側面とが付き合わされた接合面ＣＳの全長にわたって形成され、接合面ＣＳに垂直な断面の何れにおいてもほぼ同じ形状で現れる。そして、混合部３０ａは、本実施形態では、水平方向混合部３２が、蓋板２側から伝熱板本体１側に延びるように形成され、この水平方向混合部３２に連続するように、伝熱板本体１側に垂直方向混合部３２が形成されている。垂直方向混合部３２は、水平方向混合部３２と繋がった部分では、接合面ＣＳから一定の距離だけ離れた箇所に位置し、深さ方向へ行くに従い、接合面ＣＳに接近して行き、撹拌接合部３の下端では、接合面ＣＳに収束する様な形状となっている。 More specifically, the mixing unit 30a shown in FIG. 7B is formed over the entire length of the joining surface CS where the side surface of the lid groove 12 and the side surface of the lid plate 2 are attached, and has a cross section perpendicular to the joining surface CS. In any case, it appears in almost the same shape. In the present embodiment, the mixing unit 30a is formed so that the horizontal mixing unit 32 extends from the lid plate 2 side to the heat transfer plate main body 1 side, and is continuously transmitted to the horizontal mixing unit 32. A vertical mixing portion 32 is formed on the hot plate body 1 side. The vertical mixing unit 32 is located at a certain distance from the bonding surface CS at a portion connected to the horizontal mixing unit 32, and approaches the bonding surface CS as it goes in the depth direction. At the lower end of the joint portion 3, the shape converges on the joint surface CS.
そして、本実施形態では、押込凹部を形成する際に、ショルダー部５１ａの押圧する力を調節し、その押込量を増減させることにより、水平方向混合部３１の形成量を調節する。なお、押込量の割合Ｒは、伝熱板本体１及び蓋板２の厚さや材質、内部空間４の大きさに応じて種々変更可能である。また、押込量は、伝熱板本体１や蓋板２の凹凸に追従させて加減することが好ましく、その押込量は、ショルダー部５１ａの回転速度や、回転トルク、水平移動速度を変化させることによって調整することができる。 And in this embodiment, when forming a pushing recessed part, the force which the shoulder part 51a presses is adjusted, and the formation amount of the horizontal direction mixing part 31 is adjusted by increasing / decreasing the pushing amount. The ratio R of the pushing amount can be variously changed according to the thickness and material of the heat transfer plate main body 1 and the cover plate 2 and the size of the internal space 4. Moreover, it is preferable to adjust the amount of pushing by following the unevenness | corrugation of the heat exchanger plate main body 1 or the cover plate 2, and the amount of pushing changes the rotational speed of the shoulder part 51a, a rotational torque, and a horizontal movement speed. Can be adjusted by.
すなわち、図８（ａ）に示すように、押込量の割合Ｒが５％以上〜３０％未満の範囲内となるように、ショルダー部５１ａを伝熱板本体１及び蓋板２に押し込むことで、押込凹部３ａの形成量を加減する。例えば、押込量の割合Ｒを３０％に近づけるように、ショルダー部５１ａを深く押し込んで摩擦撹拌接合させることにより、水平方向混合部３１の形成量を０％に近づけることができ、図８（ｂ）に示すような混合部３０ｂを形成する。この混合部３０ｂは、伝熱板本体１及び蓋板２の表面付近から、撹拌接合部３の深さ方向にわたって形成された垂直方向混合部３２のみで形成されている。 That is, as shown in FIG. 8 (a), by pressing the shoulder portion 51a into the heat transfer plate body 1 and the cover plate 2 so that the ratio R of the push amount falls within the range of 5% to less than 30%. The amount of formation of the pressing recess 3a is adjusted. For example, the formation amount of the horizontal direction mixing portion 31 can be brought close to 0% by deeply pushing the shoulder portion 51a so as to bring the ratio R of the push amount close to 30% and performing friction stir welding, as shown in FIG. ) As shown in FIG. The mixing unit 30 b is formed only by the vertical mixing unit 32 formed from the vicinity of the surfaces of the heat transfer plate main body 1 and the cover plate 2 to the depth direction of the stirring joint 3.
この場合には、伝熱板本体１及び蓋板２の表面において、撹拌接合部３に対応した箇所、すなわち、ショルダー部５１ａが押し込まれた部分に凹状の押込凹部３ａが形成されることとなる。また、押込凹部３ａの両端には、押込凹部３ａが形成されることによって、押込凹部３ａ部分の素材が外部に押し出されてバリ３３が形成される。このバリ３３には、水平方向混合部３１の材質が含まれる。なお、上述した押込凹部３ａやバリ３３は、被膜１５とともに切削や研磨することで伝熱板の表面を平坦化することで無くすることができる。 In this case, on the surfaces of the heat transfer plate main body 1 and the cover plate 2, a concave pressing recess 3a is formed at a location corresponding to the stirring joint portion 3, that is, a portion where the shoulder portion 51a is pressed. . Further, by forming the pressing recess 3a at both ends of the pressing recess 3a, the material of the pressing recess 3a is pushed out to form a burr 33. The burr 33 includes the material of the horizontal mixing portion 31. In addition, the above-mentioned indentation recessed part 3a and the burr | flash 33 can be eliminated by planarizing the surface of a heat exchanger plate by cutting and grinding | polishing with the coating film 15. FIG.
（伝熱板の製造方法）
次いで、上述した伝熱板１０の製造方法について説明する。図６は、本実施形態に係る伝熱板１０が形成される状態を示す要部断面図である。
(Method for manufacturing heat transfer plate)
Next, a method for manufacturing the above-described heat transfer plate 10 will be described. FIG. 6 is a cross-sectional view of a main part showing a state in which the heat transfer plate 10 according to the present embodiment is formed.
先ず、伝熱板本体１と蓋板２との外面に、それぞれ、陽極酸化皮膜１５を形成させる陽極酸化形成処理を行う。この際、伝熱板本体１の少なくとも凹溝１１内面の全部に皮膜を形成するとともに、蓋板２の少なくとも凹溝１１に臨む面の全部に皮膜を形成する。 First, an anodic oxidation forming process for forming the anodic oxide film 15 on the outer surfaces of the heat transfer plate main body 1 and the cover plate 2 is performed. At this time, a film is formed on at least the entire inner surface of the groove 11 of the heat transfer plate body 1, and a film is formed on the entire surface of the lid plate 2 facing the groove 11.
この陽極酸化皮膜形成処理としては、アルマイト処理装置を用いて処理される。アルマイト処理装置としては、例えば、内部に希硫酸からなる電解液が収容されたＦＲＰ製の処理槽を用いる。このアルマイト処理装置には、アルミニウム板からなる陰極が電解液に浸漬されている。そして、伝熱板本体１又は蓋板２を、処理槽内部の陽極兼用のサポート部材によって支持した状態で、電解液内に浸し、電解液に電流を流すと、陽極に支持された伝熱板本体１又は蓋板２が電気分解を受け、それによる酸化の結果として伝熱板本体１又は蓋板２の表面に薄い陽極酸化皮膜（アルマイト皮膜）が生成される。アルマイト皮膜は、バリヤー層と無数の微細な細孔とからなる多孔質の皮膜である。 This anodized film forming process is performed using an alumite processing apparatus. As an alumite treatment apparatus, for example, an FRP treatment tank in which an electrolytic solution made of dilute sulfuric acid is accommodated is used. In this alumite treatment apparatus, a cathode made of an aluminum plate is immersed in an electrolytic solution. Then, when the heat transfer plate main body 1 or the cover plate 2 is supported by the support member also serving as an anode inside the treatment tank, the heat transfer plate supported by the anode is immersed in the electrolytic solution and a current is passed through the electrolytic solution. The main body 1 or the cover plate 2 undergoes electrolysis, and as a result of the oxidation, a thin anodized film (alumite film) is generated on the surface of the heat transfer plate main body 1 or the cover plate 2. An alumite film is a porous film composed of a barrier layer and countless fine pores.
次いで、図６（ａ）に示すように、蓋溝１２に蓋板２を嵌合を行う。具体的には、蓋板２の両側面２ａ，２ａと、蓋溝１２の両側面１２ａ，１２ａとを突き合わし、また、蓋板２の底面２ｂと、蓋溝１２の底面１２ｂとを突き合わす。 Next, as shown in FIG. 6A, the lid plate 2 is fitted into the lid groove 12. Specifically, both side surfaces 2a and 2a of the cover plate 2 and the both side surfaces 12a and 12a of the cover groove 12 are butted, and the bottom surface 2b of the cover plate 2 and the bottom surface 12b of the lid groove 12 are butted. .
その後、伝熱板１０を適宜のクランプ手段により固定し、摩擦撹拌用装置５を伝熱板１０の所定の端部に位置決めする。そして、駆動手段によって、プローブ５２を駆動させて接合処理を行う。具体的には、図６（ｂ）に示すように、プローブ５２を回転させながら、伝熱板１０に埋入させて、蓋溝１２と蓋板２との突き合わせ面に沿って伝熱板１０の面上を移動させて、摩擦撹拌接合する。 Thereafter, the heat transfer plate 10 is fixed by appropriate clamping means, and the friction stirrer 5 is positioned at a predetermined end of the heat transfer plate 10. Then, the probe 52 is driven by the driving means to perform the bonding process. Specifically, as shown in FIG. 6B, the probe 52 is rotated and embedded in the heat transfer plate 10, and the heat transfer plate 10 is aligned along the abutting surface between the cover groove 12 and the cover plate 2. The friction stir welding is carried out.
本実実施形態において、摩擦撹拌用装置５を伝熱板１０に埋入させる際、ショルダー部５１ａの一部を塑性流動した伝熱板１０の内部に押し込むように設定する。本実施形態では、ショルダー部５１ａの伝熱板１０に対する押込量を、プローブ５２の長さＤに対して５％以上から３０％未満の割合Ｒとなるように設定する。なお、この際、本実施形態において、プローブ５２は、突き合わせ面を２度走行させて摩擦撹拌を行ったり、摩擦撹拌用装置５の回転速度を従来より２０％早くしてもよい。 In the present embodiment, when the friction stir apparatus 5 is embedded in the heat transfer plate 10, the shoulder portion 51 a is set so as to be pushed into the plastic flow heat transfer plate 10. In the present embodiment, the pressing amount of the shoulder portion 51 a with respect to the heat transfer plate 10 is set so as to be a ratio R of 5% or more to less than 30% with respect to the length D of the probe 52. At this time, in this embodiment, the probe 52 may run the abutting surface twice to perform frictional stirring, or the rotational speed of the frictional stirring device 5 may be 20% faster than before.
このプローブ５２の回転により、プローブ５２と伝熱板１０との摩擦熱で伝熱板１０が軟化して塑性流動が生じ、伝熱板本体１と蓋板２とが接合された撹拌接合部３が形成される。この際、撹拌接合部３の内部に垂直方向混合部３２が形成されるとともに、伝熱板本体１及び蓋板２の表面における撹拌接合部３の上部には押込凹部３ａが形成される。また、押込凹部３ａの両端には、バリ３３が形成される。すべての突き合わせ面に摩擦撹拌接合処理がされると、図６（ｃ）に示すように、凹溝１１に熱媒体の流路としての内部空間４が形成される。その後、バリ３３を削除するとともに、押込凹部３ａの表面に合わせるように、伝熱板１０の表面は平坦処理される。 Due to the rotation of the probe 52, the heat transfer plate 10 is softened by frictional heat between the probe 52 and the heat transfer plate 10 to cause plastic flow, and the stirring joint 3 in which the heat transfer plate main body 1 and the lid plate 2 are joined. Is formed. At this time, a vertical mixing portion 32 is formed inside the stirring joint portion 3, and a pressing recess 3 a is formed at the upper portion of the stirring joint portion 3 on the surfaces of the heat transfer plate body 1 and the cover plate 2. Moreover, the burr | flash 33 is formed in the both ends of the pushing recessed part 3a. When the friction stir welding process is performed on all the butted surfaces, as shown in FIG. 6C, an internal space 4 as a heat medium flow path is formed in the concave groove 11. Thereafter, the burr 33 is removed and the surface of the heat transfer plate 10 is flattened so as to match the surface of the indentation recess 3a.
なお、上述した実施形態では、押込量の割合Ｒを５％以上から３０％未満としたが、押込量の割合Ｒを０％以上から５％未満と設定してもよい。この場合には、撹拌接合部３内部には、水平方向混合部３１と垂直方向混合部３２とが連続した混合部３０ａが形成されることとなる。 In the embodiment described above, the indentation amount ratio R is 5% or more and less than 30%, but the indentation amount ratio R may be set to 0% or more and less than 5%. In this case, a mixing unit 30 a in which the horizontal mixing unit 31 and the vertical mixing unit 32 are continuous is formed inside the stirring joint 3.
（作用・効果）
このような本実施形態によれば、陽極酸化皮膜１５が形成された伝熱板本体１と蓋板２とを摩擦撹拌によって接合するため、熱媒体の流路としての内部空間４全体に陽極酸化皮膜１５を形成させることができるとともに、伝熱板本体１と蓋溝１２との接合を摩擦撹拌接合するため、接合部分に異物が混入することを防止できるため、耐食性の高い伝熱板１０を簡易に生成することができる。
(Action / Effect)
According to this embodiment, since the heat transfer plate body 1 and the cover plate 2 on which the anodized film 15 is formed are joined by friction stirring, the entire internal space 4 as the heat medium flow path is anodized. Since the coating 15 can be formed and the heat transfer plate body 1 and the cover groove 12 are joined by friction stir welding, foreign matter can be prevented from being mixed into the joint portion. It can be generated easily.
また、本実施形態では、蓋溝１２を形成する側面１２ａと凹溝１１を形成する側面１１ａとの間隔は、プローブ５２のねじ溝５２ａを形成する一対の凸部５２ｂ，５２ｂの間隔の１．１倍乃至３倍の範囲とし、摩擦撹拌接合される範囲に対して、素材を摩擦撹拌する凸部５２ｂ，５２ｂの割合を大きくし、撹拌力を増大させたので、伝熱板本体１と蓋板２との接合強度を増大させることができる。 In the present embodiment, the distance between the side surface 12 a that forms the cover groove 12 and the side surface 11 a that forms the concave groove 11 is one of the distance between the pair of convex portions 52 b and 52 b that form the screw groove 52 a of the probe 52. Since the ratio of the convex portions 52b, 52b that friction stir the material is increased and the stirring force is increased with respect to the range where friction stir welding is performed, the heat transfer plate body 1 and the lid The bonding strength with the plate 2 can be increased.
また、本実施形態では、摩擦撹拌接合により、蓋溝１２及び蓋板２の突き合わせ面に形成された撹拌接合部３の内部に、伝熱板本体１又は蓋板２の材質と、被膜の材質とが混ざり合った混合部３０ａ，３０ｂを形成させるため、撹拌接合部３の外部は、伝熱板本体１又は蓋板２の材質のみで形成させることができ、接合強度及び耐食性を高めることができる。 Further, in the present embodiment, the material of the heat transfer plate body 1 or the cover plate 2 and the material of the coating are formed inside the stirring joint 3 formed on the butted surfaces of the cover groove 12 and the cover plate 2 by friction stir welding. In order to form the mixing portions 30a and 30b mixed with each other, the outside of the stirring joint portion 3 can be formed only of the material of the heat transfer plate main body 1 or the lid plate 2, and the joint strength and corrosion resistance can be improved. it can.
特に、本実施形態では、摩擦撹拌接合を行う際、プローブ５２の長さＤに対するショルダー部５１ａの押込量の割合Ｒを調整することにより、異なる形状の混合部３０を形成させている。具体的には、押込量の割合Ｒを０％以上から５％未満に設定して、図７（ｂ）に示すように、垂直方向混合部３２と水平方向混合部３１とが連続してなる混合部３０ａを形成させている。一方、押込量の割合Ｒを５％以上から３０％未満と設定して、図８（ｂ）に示すように、垂直方向混合部３２のみからなる混合部３０ｂを形成させている。 In particular, in the present embodiment, when performing friction stir welding, the mixing portion 30 having a different shape is formed by adjusting the ratio R of the pushing amount of the shoulder portion 51a with respect to the length D of the probe 52. Specifically, the ratio R of the indentation amount is set to 0% or more and less than 5%, and the vertical direction mixing unit 32 and the horizontal direction mixing unit 31 are continuous as shown in FIG. 7B. The mixing part 30a is formed. On the other hand, the ratio R of the indentation amount is set to 5% or more and less than 30%, and as shown in FIG. 8B, the mixing part 30b composed only of the vertical direction mixing part 32 is formed.
このように押込量の割合Ｒを調整することで、所定の形状を有する混合部３０を形成させることができるため、伝熱板本体１及び蓋板２の厚さや材質、内部空間４の大きさに対応して適切な接合強度及び耐食性を有する伝熱板１０を製造することができる。
例えば、伝熱板本体１及び蓋板２の厚みを有する場合には、押込量の割合Ｒを３０％近くに設定することで、水平方向混合部３１の材質をバリ３３として削除することができるため、撹拌接合部３内における混合部３０の含量を少なくすることができ、接合強度及び耐食性をより高めることができる。
Since the mixing portion 30 having a predetermined shape can be formed by adjusting the ratio R of the pushing amount in this way, the thickness and material of the heat transfer plate body 1 and the cover plate 2 and the size of the internal space 4 Accordingly, the heat transfer plate 10 having appropriate joint strength and corrosion resistance can be manufactured.
For example, when the heat transfer plate main body 1 and the cover plate 2 have a thickness, the material of the horizontal direction mixing portion 31 can be eliminated as the burr 33 by setting the pushing amount ratio R to be close to 30%. Therefore, the content of the mixing part 30 in the stirring joint part 3 can be reduced, and the joining strength and the corrosion resistance can be further increased.
一方、伝熱板本体１及び蓋板２の厚みが薄い場合には、押込量の割合Ｒを０％以上から５％未満に設定することで、伝熱板本体１及び蓋板２にかかる圧力を軽減させて、撹拌接合部３が内部空間４に流れ込んだり、伝熱板本体１及び蓋板２を突き抜けたりすることを防止することができる。 On the other hand, when the thickness of the heat transfer plate main body 1 and the cover plate 2 is thin, the pressure applied to the heat transfer plate main body 1 and the cover plate 2 is set by setting the ratio R of the pushing amount from 0% to less than 5%. The stirring joint 3 can be prevented from flowing into the internal space 4 and through the heat transfer plate main body 1 and the cover plate 2.
（変形例）
上述した実施形態においては、摩擦撹拌用装置５を伝熱板本体１及び蓋板２の表面に対して垂直方向に埋入させた状態で摩擦撹拌を行ったが、本発明は、これに限定するものはなく、例えば、図９に示すように、摩擦撹拌用装置５を伝熱板本体１及び蓋板２の表面に対して所定角度傾かせた状態で摩擦撹拌を行ってもよい。この場合、摩擦撹拌用装置５は、一方のショルダー部５１ａが伝熱板本体１及び蓋板２の内部に埋入され、他方のショルダー部５１ａが伝熱板本体１及び蓋板２と接しないように配置される。
(Modification)
In the embodiment described above, the friction stirrer is performed in a state where the friction stirrer 5 is embedded in the direction perpendicular to the surfaces of the heat transfer plate main body 1 and the cover plate 2, but the present invention is limited to this. For example, as shown in FIG. 9, friction stirring may be performed in a state where the friction stirring device 5 is inclined at a predetermined angle with respect to the surfaces of the heat transfer plate body 1 and the cover plate 2. In this case, in the friction stirring device 5, one shoulder portion 51a is embedded in the heat transfer plate body 1 and the cover plate 2, and the other shoulder portion 51a does not contact the heat transfer plate body 1 and the cover plate 2. Are arranged as follows.
この状態で、摩擦撹拌用装置５を突き合わせ面に沿って浮いたショルダー部５１ａを先頭として移動させると（図中のＰ１方向）、摩擦撹拌用装置５は、伝熱板本体１及び蓋板２の表面に対して所定角度傾いた状態となっているので、伝熱板本体１及び蓋板２に対して圧力をかけすぎず、深さの浅い撹拌接合部３を形成させることができるため、厚みの薄い伝熱板本体１又は蓋板２に対しても適切に耐食性の高い内部空間を備える伝熱板を形成させることができる。 In this state, when the friction stirrer 5 is moved with the shoulder 51a floating along the abutting surface as the head (P1 direction in the figure), the friction stirrer 5 is connected to the heat transfer plate body 1 and the lid plate 2. Since it is in a state inclined by a predetermined angle with respect to the surface of the heat transfer plate main body 1 and the cover plate 2 without applying too much pressure, it is possible to form the stirring joint 3 having a shallow depth, It is possible to form a heat transfer plate having an internal space with high corrosion resistance appropriately for the heat transfer plate main body 1 or the cover plate 2 having a small thickness.
なお、このような場合であっても、伝熱板本体１及び蓋板２の内部に埋入された一方のショルダー部５１ａによって、撹拌接合部３の内部に混合部を形成させることができる。 Even in such a case, the mixing portion can be formed in the stirring joint portion 3 by the one shoulder portion 51 a embedded in the heat transfer plate main body 1 and the lid plate 2.
１…伝熱板本体
２…蓋板
３…撹拌接合部
３ａ…押込凹部
４…内部空間
５…摩擦撹拌用装置
１０…伝熱板
１１…凹溝
１２…蓋溝
１５…陽極酸化皮膜
３０（３０ａ，３０ｂ）…混合部
３１…水平方向混合部
３２…垂直方向混合部
３３…バリ
５１…基台
５１ａ…ショルダー部
５２…プローブ
DESCRIPTION OF SYMBOLS 1 ... Heat-transfer plate main body 2 ... Lid plate 3 ... Agitation junction part 3a ... Pushing recessed part 4 ... Internal space 5 ... Friction stirring apparatus 10 ... Heat-transfer plate 11 ... Groove 12 ... Lid groove 15 ... Anodized film 30 (30a) 30b) ... Mixing unit 31 ... Horizontal mixing unit 32 ... Vertical mixing unit 33 ... Burr 51 ... Base 51a ... Shoulder 52 ... Probe
Claims (12)
前記蓋溝と断面形状が同一であり、少なくとも前記凹溝に臨む面の全部に皮膜が形成された蓋板と
を備え、
前記蓋溝に前記蓋板が嵌合され、当該蓋溝及び当該蓋板の突き合わせ面に沿って摩擦撹拌接合されることにより、前記凹溝及び前記蓋板に囲まれた内部空間が形成され、前記内部空間は、前記凹溝及び前記蓋板に形成された前記被膜により覆われている
ことを特徴とする伝熱板。 A lid groove having a predetermined cross-sectional shape is formed, a concave groove is provided on the bottom surface of the lid groove, and a heat transfer plate main body having a film formed at least on the entire inner surface of the concave groove;
The lid groove has the same cross-sectional shape, and includes a lid plate on which a film is formed at least on the entire surface facing the concave groove,
The lid plate is fitted into the lid groove, and friction stir welding is performed along the lid groove and the abutting surface of the lid plate, thereby forming an internal space surrounded by the concave groove and the lid plate. The heat transfer plate, wherein the internal space is covered with the coating formed on the concave groove and the lid plate.
前記蓋溝と断面形状が同一である蓋板と
を備えた伝熱板の製造方法であって、
前記伝熱板本体の少なくとも前記凹溝内面の全部に皮膜を形成するとともに、前記蓋板の少なくとも前記凹溝に臨む面の全部に皮膜を形成する被膜形成処理と、
前記蓋溝に前記蓋板を嵌合し、当該蓋溝及び当該蓋板の突き合わせ面に沿って摩擦撹拌接合する接合処理と
を有することを特徴とする伝熱板の製造方法。 A lid groove having a predetermined cross-sectional shape is formed, and a heat transfer plate body provided with a concave groove on the bottom surface of the lid groove,
A method of manufacturing a heat transfer plate comprising the lid groove and a lid plate having the same cross-sectional shape,
A film forming process for forming a film on at least the entire inner surface of the concave groove of the heat transfer plate body, and forming a film on at least the entire surface of the lid plate facing the concave groove,
A method of manufacturing a heat transfer plate, comprising: joining the lid plate to the lid groove, and performing a friction stir welding along the lid groove and the abutting surface of the lid plate.
前記伝熱板本体及び前記蓋板の表面における前記撹拌接合部に対応した箇所を、押圧しつつ切削することによって、押込凹部を形成し、
前記押込凹部を形成する際には、前記押圧する力を調節することにより、前記水平方向混合部の形成量を調節する
ことを特徴とする請求項８に記載の伝熱板の製造方法。 In the joining process,
By cutting the portion corresponding to the stirring joint on the surface of the heat transfer plate main body and the lid plate while pressing, a pressing recess is formed,
The method for manufacturing a heat transfer plate according to claim 8, wherein when forming the indentation recess, the amount of formation of the horizontal mixing portion is adjusted by adjusting the pressing force.
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