JP2019114515A - Manufacturing installation for separator for fuel cell and manufacturing method for separator for fuel cell - Google Patents
Manufacturing installation for separator for fuel cell and manufacturing method for separator for fuel cell Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
Description
本発明は、燃料電池用セパレータの製造装置及び燃料電池用セパレータの製造方法に関する。 The present invention relates to an apparatus for producing a fuel cell separator and a method for producing a fuel cell separator.
固体高分子形燃料電池は、複数の単セルを積層して構成された燃料電池スタックを備えている。単セルは、膜電極接合体と、膜電極接合体を挟持する一対のセパレータとを有している。 A polymer electrolyte fuel cell comprises a fuel cell stack configured by stacking a plurality of single cells. A single cell has a membrane electrode assembly and a pair of separators sandwiching the membrane electrode assembly.
膜電極接合体は、固体高分子材料のイオン交換膜からなる電解質膜と、同電解質膜の一方の面に設けられた燃料極（アノード）と、同電解質膜の他方の面に設けられた空気極（カソード）とを有している。 The membrane electrode assembly comprises an electrolyte membrane comprising an ion exchange membrane of a solid polymer material, a fuel electrode (anode) provided on one side of the electrolyte membrane, and an air provided on the other side of the electrolyte membrane. And a pole (cathode).
一対のセパレータは、それぞれ金属などの導電性材料からなる。膜電極接合体の燃料極側に設けられるセパレータの燃料極側の面には、同燃料極に対して水素などの燃料ガスを供給するガス通路が形成されている。膜電極接合体の空気極側に設けられるセパレータの空気極側の面には、同空気極側に空気などの酸化ガスを供給するガス通路が形成されている。また、積層方向に隣接する単セルのセパレータ同士は当接されており、これらセパレータの対向面には、冷却媒体が流通する冷却通路が形成されている。 The pair of separators are each made of a conductive material such as metal. On the fuel electrode side of the separator provided on the fuel electrode side of the membrane electrode assembly, a gas passage for supplying a fuel gas such as hydrogen to the fuel electrode is formed. On the air electrode side of the separator provided on the air electrode side of the membrane electrode assembly, a gas passage for supplying an oxidizing gas such as air to the air electrode side is formed. Further, the separators of the single cells adjacent in the stacking direction are in contact with each other, and a cooling passage through which the cooling medium flows is formed on the facing surfaces of these separators.
各ガス通路を通じて燃料ガス及び酸化ガスが供給されることにより、膜電極接合体内において燃料ガスと酸化ガスとの電気化学反応が生じ、これに伴って起電力が得られる。
こうしたガス通路や冷却通路は、セパレータの両面に設けられた多数の溝部により構成されている（例えば、特許文献１参照）。
By supplying the fuel gas and the oxidizing gas through each gas passage, an electrochemical reaction between the fuel gas and the oxidizing gas occurs in the membrane electrode assembly, and an electromotive force is obtained accordingly.
Such gas passages and cooling passages are constituted by a large number of grooves provided on both sides of the separator (see, for example, Patent Document 1).
ところで、セパレータと膜電極接合体との間やセパレータ同士の間におけるシール性、導電性、及び熱伝達性を確保する上で、セパレータの各溝部の底面の裏面を形成してセパレータと膜電極接合体との接触面積やセパレータ同士の接触面積を確保する必要がある。 By the way, in order to secure the sealability, conductivity, and heat transfer between the separator and the membrane electrode assembly and between the separators, the bottom surface of each groove of the separator is formed to form the back surface of the separator and the membrane electrode. It is necessary to secure the contact area with the body and the contact area between the separators.
ところが、プレス金型を用いて金属板材からなるセパレータ材料を一度に成形しようとすると、金型に高い精度が求められることで加工費が増大するといった問題や、大きな成形荷重が求められるために製造装置が大型化するといった問題が生じる。 However, when trying to form a separator material consisting of a metal plate at a time using a press die, the manufacturing cost is increased because the die is required to have high accuracy, and a large forming load is required. There is a problem that the size of the device is increased.
これに対して、特許文献１に記載のセパレータの製造装置及び製造方法では、まず一対の第１成形型を用いてセパレータ材を曲げ加工することにより、上記溝部となる部位を仮成形する。次に、一対の第２成形用型を用いて、上記部位が成形されたセパレータ材を圧縮加工することにより上記溝部を本成形する。 On the other hand, in the apparatus and method for manufacturing a separator described in Patent Document 1, first, the separator material is bent using a pair of first molding dies to temporarily form a portion to be the groove. Next, the groove portion is main-formed by compressing the separator material having the above-described portion formed using the pair of second forming dies.
しかしながら、この場合には、２種類の成形型が必要となるとともに２つの成形工程が必要となるといった背反が生じる。
本発明の目的は、成形荷重を抑えつつ、一度のプレス工程によりセパレータを成形することのできる燃料電池用セパレータの製造装置及び燃料電池用セパレータの製造方法を提供することにある。
However, in this case, there is a trade-off that two types of molds are required and two molding steps are required.
An object of the present invention is to provide an apparatus for manufacturing a fuel cell separator and a method for manufacturing a fuel cell separator, which can form a separator in a single pressing process while suppressing a forming load.
上記目的を達成するための燃料電池用セパレータの製造装置は、第１凸部及び前記第１凸部を挟んで設けられた一対の第１凹部がそれぞれ延在されてなる成形面を有する第１成形型と、前記第１凹部の各々に対向する一対の第２凸部及び前記第２凸部の各々の間に設けられて前記第１凸部に対向する第２凹部がそれぞれ延在されてなる成形面を有する第２成形型と、を備え、前記第１成形型と前記第２成形型とにより金属板材をプレスすることにより、その両面に多数の溝部を形成する。前記第２凹部の底面には、前記第２凹部の延在方向に沿って延在する突条が設けられており、前記第１凸部の頂面には、前記突条に対向するとともに前記第１凸部の延在方向に沿って延在し、前記突条の突出高さよりも大きい深さを有する凹溝が設けられている。 An apparatus for manufacturing a fuel cell separator to achieve the above object has a first forming surface formed by extending a first protrusion and a pair of first recesses provided on both sides of the first protrusion. A second concave portion provided between the molding die and each of the pair of second convex portions facing each of the first concave portions and the second convex portions and facing the first convex portion is extended, respectively. And forming a plurality of groove portions on both sides by pressing the metal plate material by the first forming die and the second forming die. The bottom surface of the second recess is provided with a protrusion extending along the extending direction of the second recess, and the top surface of the first protrusion is opposed to the protrusion and the protrusion A recessed groove is provided which extends along the extending direction of the first protrusion and has a depth greater than the height of protrusion of the protrusion.
同構成によれば、第１成形型と第２成形型とによって金属板材をプレスする際、まず、金属板材は、各成形面の凹凸形状に倣うように波形に成形される。この状態から更に第１成形型と第２成形型とを近接させると、金属板材のうち第１凸部により押圧されて第２凹部内に突出された部分（以下、第１突出部）が第２凹部の突条に押し当てられる。そして、この状態から更に第１成形型と第２成形型とを近接させると、第１突出部は、突条を支点として曲げ変形されて、第２凹部の底面に沿うように変形する。その後、金属板材のうち第１凸部と第２凹部との間の部分には、第１凸部の頂面と第２凹部の底面とにより圧縮加重が作用されることで、第１突出部の先端部分がセパレータの一方の面における溝部の底部に成形される。なお、第１突出部のうち第１凸部の頂面に対向する部分の一部は、凹溝内に逃がされることとなるが、凹溝の深さは、突条の突出高さよりも大きくされているため、凹溝との間には隙間が生じる。 According to the same configuration, when the metal plate material is pressed by the first forming die and the second forming die, first, the metal plate material is formed into a corrugated shape so as to follow the concavo-convex shape of each forming surface. When the first forming die and the second forming die are further brought close to each other from this state, a portion (hereinafter, the first projecting portion) of the metal plate material pressed by the first convex portion and projected into the second concave portion 2 Pressed against the ridge of the recess. Then, when the first forming die and the second forming die are further brought close to each other from this state, the first protrusion is bent and deformed with the protrusion as a fulcrum, and is deformed along the bottom surface of the second recess. Thereafter, a compressive load is applied to a portion between the first convex portion and the second concave portion of the metal plate material by the top surface of the first convex portion and the bottom surface of the second concave portion, thereby the first projecting portion The tip portion of is formed on the bottom of the groove on one side of the separator. In addition, although a part of the part which opposes the top face of the 1st convex part among the 1st projection parts will be escaped in a ditch, the depth of a ditch is larger than the projection height of a projection. Therefore, a gap is generated between the groove and the groove.
一方、金属板材のうち第２凸部により押圧されて第１凹部内に突出された部分（以下、第２突出部）には、第２凸部の頂面と第１凹部の底面とにより圧縮加重が作用する。これにより、第２突出部の先端部分がセパレータの他方の面における溝部の底部に成形される。 On the other hand, in the portion of the metal plate material that is pressed by the second protrusion and protrudes into the first recess (hereinafter, the second protrusion), compression is performed by the top surface of the second protrusion and the bottom of the first recess. Weight acts. Thereby, the tip end portion of the second protrusion is formed at the bottom of the groove on the other surface of the separator.
このように、上記構成によれば、セパレータの一方の面の溝部の底部については圧縮加重により成形され、他方の面の溝部については曲げ変形に伴う曲げ応力を用いつつ圧縮加重により成形される。このため、両面の溝部の底部をいずれも圧縮加重のみにより成形する場合と比較して、プレスに要する荷重を低くすることができる。したがって、成形荷重を抑えつつ、一度のプレス工程によりセパレータを成形することができる。 As described above, according to the above configuration, the bottom of the groove on one side of the separator is formed by compression loading, and the groove on the other side is formed by compression loading using bending stress accompanying bending deformation. For this reason, compared with the case where the bottom part of the groove part of both surfaces is formed only by compression loading, the load which a press requires can be made low. Therefore, the separator can be formed by one pressing process while suppressing the forming load.
また、上記目的を達成するための燃料電池用セパレータの製造方法は、第１凸部及び前記第１凸部を挟んで設けられた一対の第１凹部がそれぞれ延在された第１成形型と、前記第１凹部の各々に対向する一対の第２凸部及び前記第２凸部の各々の間に設けられて前記第１凸部に対向する第２凹部がそれぞれ延在された第２成形型とにより、金属板材をプレスすることにより、その両面に多数の溝部を形成する。前記第２凹部の底面には、前記第２凹部の延在方向に沿って延在する突条が設けられており、前記第１凸部の頂面には、前記突条に対向するとともに前記第１凸部の延在方向に沿って延在し、前記突条の突出高さよりも大きい深さを有する凹溝が設けられており、前記第２凸部の頂面と前記第１凹部の底面とにより前記金属板材を圧縮荷重により成形する一方、前記第１凸部の頂面と第２凹部の底面とにより前記金属板材を圧縮荷重により成形するに先立ち、前記突条を支点として曲げ応力を作用させる。 Further, a method of manufacturing a fuel cell separator to achieve the above object is a first molding die in which a first convex portion and a pair of first concave portions provided to sandwich the first convex portion are extended, respectively. A second molding is provided between a pair of second protrusions facing each of the first recesses and each of the second protrusions, and a second recess facing the first protrusions is extended, respectively. By pressing a metal plate material with a mold, a large number of grooves are formed on both sides thereof. The bottom surface of the second recess is provided with a protrusion extending along the extending direction of the second recess, and the top surface of the first protrusion is opposed to the protrusion and the protrusion A recessed groove extending along the extending direction of the first convex portion and having a depth larger than the protruding height of the protrusion is provided, and the top surface of the second convex portion and the first concave portion Prior to forming the metal plate material by the compression load by the top surface of the first convex portion and the bottom surface of the second recess while forming the metal plate material by the compression load by the bottom surface, bending stress is used with the protrusion as a fulcrum To work.
同方法によれば、上記燃料電池用セパレータの製造装置による作用効果に準じた作用効果を奏することができる。 According to the same method, it is possible to achieve the operation and effect according to the operation and effect by the manufacturing apparatus of the fuel cell separator.
本発明によれば、成形荷重を抑えつつ、一度のプレス工程によりセパレータを成形することができる。 According to the present invention, the separator can be formed by one pressing process while suppressing the forming load.
以下、図１〜図５を参照して、燃料電池用セパレータの製造装置の一実施形態について説明する。
本実施形態の燃料電池用セパレータの製造装置（以下、製造装置）は、図１に示す固体高分子形燃料電池のスタック１００に用いられるセパレータ２０を製造する装置である。なお、セパレータ２０は、後述する一対のセパレータ２１，２２の総称である。
Hereinafter, an embodiment of a manufacturing apparatus of a fuel cell separator will be described with reference to FIGS. 1 to 5.
The fuel cell separator manufacturing apparatus (hereinafter, manufacturing apparatus) of the present embodiment is an apparatus for manufacturing the separator 20 used in the stack 100 of the polymer electrolyte fuel cell shown in FIG. The separator 20 is a generic name of a pair of separators 21 and 22 described later.
図１に示すように、スタック１００は、複数の単セル１０が積層された構造を有している。単セル１０は、凹凸形状を有する一対のセパレータ２１，２２により挟持された膜電極接合体１１と、膜電極接合体１１と各セパレータ２１，２２との間に介設された炭素繊維からなるガス拡散層１４とを備えている。膜電極接合体１１は、イオン交換膜である電解質膜１２と、電解質膜１２を挟持する一対の触媒電極層１３とを備えている。 As shown in FIG. 1, the stack 100 has a structure in which a plurality of single cells 10 are stacked. The unit cell 10 is a gas composed of a membrane electrode assembly 11 sandwiched by a pair of separators 21 and 22 having a concavo-convex shape, and a carbon fiber interposed between the membrane electrode assembly 11 and the separators 21 and 22. A diffusion layer 14 is provided. The membrane electrode assembly 11 includes an electrolyte membrane 12 which is an ion exchange membrane, and a pair of catalyst electrode layers 13 which sandwich the electrolyte membrane 12.
一方のセパレータ２１の両面には、それぞれ延在する第１溝部２１ａ及び第２溝部２１ｂが交互に並設されている。また、他方のセパレータ２２の両面には、それぞれ延在する第１溝部２２ａ及び第２溝部２２ｂが交互に並設されている。各セパレータ２１，２２の第１溝部２１ａ，２２ａの底面の裏面（図１の下面及び上面）は、各ガス拡散層１４に当接されている。一方のセパレータ２１の第２溝部２１ｂと一方のガス拡散層１４とで区画される部分は、水素などの燃料ガスが流通されるガス流路とされている。他方のセパレータ２２の第２溝部２２ｂと他方のガス拡散層１４とで区画される部分は、空気などの酸化ガスが流通されるガス流路とされている。 On both surfaces of one of the separators 21, first groove portions 21a and second groove portions 21b extending respectively are alternately arranged in parallel. Further, on both surfaces of the other separator 22, first groove portions 22a and second groove portions 22b extending respectively are alternately arranged in parallel. The back surfaces (the lower surface and the upper surface in FIG. 1) of the bottom surfaces of the first groove portions 21 a and 22 a of the separators 21 and 22 are in contact with the gas diffusion layers 14. A portion partitioned by the second groove 21b of the one separator 21 and the one gas diffusion layer 14 is a gas flow path through which a fuel gas such as hydrogen flows. A portion partitioned by the second groove 22b of the other separator 22 and the other gas diffusion layer 14 is a gas flow channel through which an oxidizing gas such as air flows.
また、一方のセパレータ２１における第２溝部２１ｂの底面の裏面（図１の上面）と、同セパレータ２１に隣り合う他方のセパレータ２２の第２溝部２２ｂの裏面（図１の下面）とは当接されている。一方のセパレータ２１の第１溝部２１ａと、他方のセパレータ２２における上記第１溝部２１ａに対向する第１溝部２２ａとで区画される部分は、冷却水が流通する冷却流路とされている。 Further, the back surface (upper surface in FIG. 1) of the bottom surface of the second groove 21b in one separator 21 and the back surface (lower surface in FIG. 1) of the second groove 22b of the other separator 22 adjacent to the separator 21 abut It is done. A portion defined by the first groove 21a of one separator 21 and the first groove 22a opposite to the first groove 21a of the other separator 22 is a cooling flow channel through which the cooling water flows.
各セパレータ２１，２２は、例えば、ステンレス鋼やチタンなどの金属材料により成形される。
次に、製造装置について説明する。
Each of the separators 21 and 22 is formed of, for example, a metal material such as stainless steel or titanium.
Next, the manufacturing apparatus will be described.
図２に示すように、製造装置は、可動型である第１成形型３０と、固定型である第２成形型６０とを備えている。第１成形型３０は、第２成形型６０に対して進退可能に設けられている。 As shown in FIG. 2, the manufacturing apparatus includes a movable first mold 30 and a fixed second mold 60. The first mold 30 is provided so as to be movable relative to the second mold 60.
第１成形型３０は、それぞれ延在する第１凸部４０と第１凹部５０とが交互に設けられた成形面３１を有している。第１凸部４０は、頂面４１及び一対の側面４２を有している。一対の側面４２間の距離は、第１凸部４０の突出方向（同図の上下方向）において頂面４１に近接するほど小さくされている。頂面４１と各側面４２との間の角部４３は湾曲されている。第１凹部５０の底面５１と各側面４２との間の隅部は湾曲されている。第１凸部４０の頂面４１には、第１凸部４０の延在方向（同図の紙面垂直方向）に沿って延在する断面円弧状の凹溝４０ａが設けられている。 The first molding die 30 has a molding surface 31 in which first convex portions 40 and first concave portions 50 extending respectively are alternately provided. The first convex portion 40 has a top surface 41 and a pair of side surfaces 42. The distance between the pair of side surfaces 42 is smaller as it approaches the top surface 41 in the projecting direction of the first convex portion 40 (vertical direction in the same drawing). The corner 43 between the top surface 41 and each side surface 42 is curved. The corners between the bottom surface 51 and the side surfaces 42 of the first recess 50 are curved. The top surface 41 of the first convex portion 40 is provided with a concave groove 40a having an arc-shaped cross section extending along the extending direction of the first convex portion 40 (the direction perpendicular to the sheet of the drawing).
第２成形型６０は、それぞれ延在する第２凸部７０と第２凹部８０とが交互に設けられた成形面３２を有している。第２凸部７０は、頂面７１及び一対の側面７２を有している。一対の側面７２間の距離は、第２凸部７０の突出方向（同図の上下方向）において頂面７１に近接するほど小さくされている。頂面７１と各側面７２との角部は湾曲されている。第２凹部８０の底面８１と各側面７２との間の隅部は湾曲されている。第２凹部８０の底面８１には、凹溝４０ａに対向するとともに、第２凹部８０の延在方向（同図の紙面垂直方向）に沿って延在する断面円弧状の突条８０ａが設けられている。なお、凹溝４０ａの深さは、突条８０ａの突出高さよりも大きくされている。 The second molding die 60 has a molding surface 32 in which second protrusions 70 and second recesses 80 extending respectively are alternately provided. The second convex portion 70 has a top surface 71 and a pair of side surfaces 72. The distance between the pair of side surfaces 72 is smaller as it approaches the top surface 71 in the projecting direction of the second convex portion 70 (vertical direction in the same drawing). The corners between the top surface 71 and the side surfaces 72 are curved. The corners between the bottom surface 81 and the side surfaces 72 of the second recess 80 are curved. The bottom surface 81 of the second recess 80 is provided with a protrusion 80a having an arc-shaped cross section that faces the recess 40a and extends along the extending direction of the second recess 80 (the direction perpendicular to the sheet of FIG. ing. In addition, the depth of the concave groove 40a is made larger than the protrusion height of the protrusion 80a.
ここで、第２凹部８０の底面８１に対する第２凸部７０の各側面７２の傾斜角度は、第１凹部５０の底面５１に対する第１凸部４０の各側面４２の傾斜角度よりも大きくされている。 Here, the inclination angles of the side surfaces 72 of the second protrusion 70 with respect to the bottom surface 81 of the second recess 80 are made larger than the inclination angles of the side surfaces 42 of the first protrusion 40 with respect to the bottom surface 51 of the first recess 50. There is.
本実施形態の作用について説明する。
本実施形態の製造装置においては、以下のようにしてセパレータ２０が製造される。
図３に示すように、まず、第２成形型６０の第２凸部７０上にセパレータ２０の材料である基材１２０を載置する。
The operation of this embodiment will be described.
In the manufacturing apparatus of the present embodiment, the separator 20 is manufactured as follows.
As shown in FIG. 3, first, the base material 120 which is the material of the separator 20 is placed on the second convex portion 70 of the second molding die 60.
次に、第１成形型３０を第２成形型６０に向かって変位させる。これにより、図４に示すように、基材１２０は、各成形面３１，３２の凹凸形状に倣うように波形に成形される。 Next, the first mold 30 is displaced toward the second mold 60. Thereby, as shown in FIG. 4, the base material 120 is formed in a waveform so as to follow the concavo-convex shape of each of the forming surfaces 31, 32.
その後、更に第１成形型３０を第２成形型６０に近接させると、基材１２０のうち第１凸部４０により押圧されて第２凹部８０内に突出された部分（以下、第１突出部１３０）が、第２凹部８０の突条８０ａに押し当てられる。 Thereafter, when the first molding die 30 is further brought close to the second molding die 60, a portion of the base material 120 which is pressed by the first convex portion 40 and protrudes into the second concave portion 80 (hereinafter referred to as a first protrusion) 130) is pressed against the ridge 80a of the second recess 80.
そして、更に第１成形型３０を第２成形型６０に近接させると、第１突出部１３０は、第１凸部４０の各角部４３と突条８０ａとを支点として曲げ変形されて、第２凹部８０の底面８１に沿うように変形する。 Then, when the first forming die 30 is further brought close to the second forming die 60, the first protrusion 130 is bent and deformed with the corner portions 43 of the first protrusion 40 and the ridges 80a as a fulcrum. (2) It deforms along the bottom surface 81 of the recess 80.
その後、図５に示すように、基材１２０の第１突出部１３０には、第１凸部４０の頂面４１と第２凹部８０の底面８１とにより圧縮荷重が作用される。ここで、基材１２０の第１突出部１３０と第２凸部７０の各側面７２との間には逃げ部９０が形成される。第１凸部４０の幅方向（図４及び図５の左右方向）における逃げ部９０の長さは、第２凸部７０の頂面７１に向かうほど小さくされている。上述したように、第１突出部１３０は、曲げ変形に伴う曲げ応力と圧縮荷重（圧縮応力）とが付与されているため、逃げ部９０に逃げるようにして変形される。このため、第１突出部１３０の先端面が平坦面とされる。これにより、第１突出部１３０の先端部分が、セパレータ２０の一方の面における溝部の底部に成形される。なお、図５に示すように、第１突出部１３０のうち第１凸部４０の頂面４１に対向する部分の一部は、凹溝４０ａ内に逃がされることとなる。上述したように、凹溝４０ａの深さが、突条８０ａの突出高さよりも大きくされているため、凹溝４０ａとの間には隙間９１が生じる。 Thereafter, as shown in FIG. 5, a compressive load is exerted on the first protrusion 130 of the base material 120 by the top surface 41 of the first protrusion 40 and the bottom surface 81 of the second recess 80. Here, clearances 90 are formed between the first protrusion 130 of the base material 120 and the side surfaces 72 of the second protrusion 70. The length of the relief portion 90 in the width direction (left and right direction in FIGS. 4 and 5) of the first convex portion 40 is smaller toward the top surface 71 of the second convex portion 70. As described above, since the bending stress and the compressive load (compressive stress) associated with the bending deformation are applied, the first projecting portion 130 is deformed so as to escape to the relief portion 90. Therefore, the tip end surface of the first protrusion 130 is flat. As a result, the tip end portion of the first protrusion 130 is formed at the bottom of the groove in one surface of the separator 20. In addition, as shown in FIG. 5, a part of the part which opposes the top face 41 of the 1st convex part 40 among the 1st protrusion parts 130 will be escaped in the ditch | groove 40a. As described above, since the depth of the recessed groove 40a is larger than the protruding height of the protrusion 80a, a gap 91 is generated between the recessed groove 40a and the recessed groove 40a.
一方、基材１２０のうち第２凸部７０により押圧されて第１凹部５０内に突出された部分（以下、第２突出部１４０）には、第２凸部７０の頂面７１と第１凹部５０の底面５１とにより圧縮荷重が作用する。これにより、第２突出部１４０の先端部分がセパレータ２０の他方の面における溝部の底部に成形される。 On the other hand, in the portion of the base material 120 which is pressed by the second projection 70 and protrudes into the first recess 50 (hereinafter, the second projection 140), the top surface 71 of the second projection 70 and the first surface A compressive load acts on the bottom surface 51 of the recess 50. Thereby, the tip end portion of the second protrusion 140 is formed at the bottom of the groove on the other surface of the separator 20.
なお、図４に示すように、第１突出部１３０が曲げ変形される直前においては、第２突出部１４０の頂面１４１は、部分的に荷重が負荷されたプレス途中の状態であるため、セパレータ２０の溝部の底部の成形は完了していない。基材１２０のプレス成形においては、上記圧縮荷重によって、まず、第１突出部１３０が曲げ変形される。続いて、第２突出部１４０の頂面１４１全体がプレスされるとともに、第１突出部１３０の頂面１３１全体がプレスされる。このようにして、セパレータ２０の両面における溝部の底部がそれぞれ成形されることとなる。 As shown in FIG. 4, since the top surface 141 of the second projecting portion 140 is in the middle of the pressing process in which a load is partially applied immediately before the first projecting portion 130 is bent and deformed, The formation of the bottom of the groove of the separator 20 is not complete. In press forming of the base material 120, the first protrusion 130 is first bent and deformed by the above-mentioned compressive load. Subsequently, the entire top surface 141 of the second protrusion 140 is pressed, and the entire top surface 131 of the first protrusion 130 is pressed. In this manner, the bottoms of the groove portions on both sides of the separator 20 are respectively formed.
本実施形態の効果について説明する。
（１）燃料電池用セパレータの製造装置は、第１凸部４０及び第１凸部４０を挟んで設けられた一対の第１凹部５０がそれぞれ延在されてなる成形面３１を有する第１成形型３０を備える。さらに、第１凹部５０の各々に対向する一対の第２凸部７０及び第２凸部７０の各々の間に設けられて第１凸部４０に対向する第２凹部８０がそれぞれ延在されてなる成形面３２を有する第２成形型６０を備える。第１成形型３０と第２成形型６０とにより基材１２０をプレスすることにより、その両面に多数の溝部を形成する。第２凹部８０の底面８１には、第２凹部８０の延在方向に沿って延在する突条８０ａが設けられており、第１凸部４０の頂面４１には、突条８０ａに対向するとともに第１凸部４０の延在方向に沿って延在し、突条８０ａの突出高さよりも大きい深さを有する凹溝４０ａが設けられている。
The effects of this embodiment will be described.
(1) The apparatus for manufacturing a fuel cell separator includes a first molding 40 having a molding surface 31 formed by extending a pair of first concave portions 50 provided with the first convex portion 40 and the first convex portions 40 interposed therebetween. A mold 30 is provided. Furthermore, a second concave portion 80 provided between each of the pair of second convex portions 70 and the second convex portions 70 opposed to each of the first concave portions 50 and opposed to the first convex portion 40 is extended, respectively. And a second mold 60 having a molding surface 32. By pressing the base material 120 with the first mold 30 and the second mold 60, a large number of grooves are formed on both sides thereof. The bottom surface 81 of the second recess 80 is provided with a protrusion 80 a extending along the extending direction of the second recess 80, and the top surface 41 of the first protrusion 40 is opposed to the protrusion 80 a At the same time, a recessed groove 40a is provided which extends along the extending direction of the first convex portion 40 and has a depth greater than the height of projection of the protrusion 80a.
こうした構成によれば、上述した作用を奏することからセパレータ２０の一方の面の溝部の底部については圧縮加重により成形され、他方の面の溝部については曲げ変形に伴う曲げ応力を用いつつ圧縮加重により成形される。このため、両面の溝部の底部をいずれも圧縮加重のみにより成形する場合と比較して、プレスに要する荷重を低くすることができる。したがって、成形荷重を抑えつつ、一度のプレス工程によりセパレータ２０を成形することができる。 According to such a configuration, the bottom of the groove on one side of the separator 20 is formed by compression loading, and the groove on the other side is compressed using compression stress while using bending stress associated with bending deformation. It is molded. For this reason, compared with the case where the bottom part of the groove part of both surfaces is formed only by compression loading, the load which a press requires can be made low. Therefore, the separator 20 can be formed by one pressing process while suppressing the forming load.
（２）第２凸部７０の頂面７１と第１凹部５０の底面５１とにより基材１２０を圧縮荷重により成形する一方、第１凸部４０の頂面４１と第２凹部８０の底面８１とにより基材１２０を圧縮荷重により成形するに先立ち、突条８０ａを支点として曲げ応力を作用させるようにした。 (2) The base 120 is formed with a compressive load by the top surface 71 of the second protrusion 70 and the bottom surface 51 of the first recess 50, while the top surface 41 of the first protrusion 40 and the bottom surface 81 of the second recess 80 Before forming the base material 120 by a compressive load, bending stress is applied to the ridge 80a as a fulcrum.
こうした方法によれば、上記効果（１）と同様な効果を奏することができる。
本実施形態は、以下のように変更して実施することができる。本実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。
According to such a method, the same effect as the above effect (1) can be obtained.
The present embodiment can be modified as follows. The present embodiment and the following modifications can be implemented in combination with one another as long as there is no technical contradiction.
・基材１２０の少なくとも一方の面に例えば導電性粒子を含有する塗膜が設けられたものをプレス成形するようにしてもよい。
・突条８０ａ及び凹溝４０ａの断面形状、例えば、幅や高さ（深さ）は実施形態において例示したものに限定されず、適宜変更することもできる。
The substrate on which at least one surface of the substrate 120 is provided with a coating containing, for example, conductive particles may be press-formed.
-The cross-sectional shape of the protrusion 80a and the ditch | groove 40a, for example, a width | variety and height (depth), is not limited to what was illustrated in embodiment, It can also be suitably changed.
・本実施形態では、第２成形型６０に対して第１成形型３０を進退させる構成であったが、第１成形型３０に対して、第２成形型６０を進退させるようにしてもよいし、互いに進退させるようにしてもよい。 In the present embodiment, the first mold 30 is moved forward and backward with respect to the second mold 60, but the second mold 60 may be moved forward and backward with respect to the first mold 30. It may be made to advance and retreat with each other.
・第１成形型３０は、第１凸部４０とは別に、凹溝４０ａが設けられていない凸部を有していてもよく、第２成形型６０は、第２凹部８０とは別に、突条８０ａが設けられていない凹部を有していてもよい。 The first molding die 30 may have a convex portion not provided with the recessed groove 40 a separately from the first convex portion 40, and the second molding die 60 may be separately from the second concave portion 80, You may have the recessed part in which the protrusion 80a is not provided.
・本実施形態では、図５に示すように、基材１２０の第１突出部１３０のうちの第１凸部４０の頂面４１に対向する部分の一部と、第１凸部４０の凹溝４０ａとの間に隙間９１が生じるようにした。例えば、隙間９１が生じないようにするなど、第１突出部１３０の上記一部が圧縮荷重により鍛造されない程度に、凹溝４０ａの深さを設定することもできる。 In the present embodiment, as shown in FIG. 5, a part of the portion of the first protrusion 130 of the base member 120 facing the top surface 41 of the first protrusion 40 and the recess of the first protrusion 40 A gap 91 was created between the groove 40a and the groove 40a. For example, the depth of the recessed groove 40a can also be set to such an extent that the part of the first protrusion 130 is not forged by a compressive load, such as preventing the gap 91 from being generated.
１０…単セル、１１…膜電極接合体、１２…電解質膜、１３…触媒電極層、１４…ガス拡散層、２０…セパレータ、２１…セパレータ、２１ａ…第１溝部、２１ｂ…第２溝部、２２…セパレータ、２２ａ…第１溝部、２２ｂ…第２溝部、３０…第１成形型、３１…成形面、３２…成形面、４０…第１凸部、４０ａ…凹溝、４１…頂面、４２…側面、４３…角部、５０…第１凹部、５１…底面、６０…第２成形型、７０…第２凸部、７１…頂面、７２…側面、８０…第２凹部、８０ａ…突条、８１…底面、９０…逃げ部、９１…隙間、１００…スタック、１２０…基材、１３０…第１突出部、１３１…頂面、１４０…第２突出部、１４１…頂面。 DESCRIPTION OF SYMBOLS 10 single cell 11 membrane electrode assembly 12 electrolyte membrane 13 catalyst electrode layer 14 gas diffusion layer 20 separator 21 separator 21 a first groove portion 21 b second groove portion 22 ... separators 22a ... 1st groove, 22b ... 2nd groove, 30 ... 1st mold, 31 ... molding surface, 32 ... molding surface, 40 ... 1st convex part, 40a ... concave groove, 41 ... top surface, 42 ... side surface 43 corner portion 50 first concave portion 51 bottom surface 60 second molding die 70 second convex portion 71 top surface 72 side surface 80 second concave portion 80a projection Bottom surface 90, relief portion 91, clearance portion 100, stack 100, base material 130, first projecting portion 131, top surface, 140 second projecting portion, 141 top surface.
Claims (2)
前記第２凹部の底面には、前記第２凹部の延在方向に沿って延在する突条が設けられており、
前記第１凸部の頂面には、前記突条に対向するとともに前記第１凸部の延在方向に沿って延在し、前記突条の突出高さよりも大きい深さを有する凹溝が設けられている、
燃料電池用セパレータの製造装置。 A first mold having a molding surface formed by extending a first convex portion and a pair of first concave portions provided on both sides of the first convex portion, and a pair of first molds facing each of the first concave portions A second mold having a molding surface provided between each of the second protrusion and the second protrusion and having a second recess extending opposite to the first protrusion and extending therefrom; A manufacturing apparatus for a fuel cell separator, in which a large number of grooves are formed on both sides of a metal plate material by pressing the metal plate material by the first forming die and the second forming die,
The bottom surface of the second recess is provided with a protrusion extending along the extending direction of the second recess,
On the top surface of the first convex portion, there is a concave groove facing the ridge and extending along the extending direction of the first convex portion, and having a depth greater than the height of projection of the ridge Provided
Production device for fuel cell separators.
前記第２凹部の底面には、前記第２凹部の延在方向に沿って延在する突条が設けられており、
前記第１凸部の頂面には、前記突条に対向するとともに前記第１凸部の延在方向に沿って延在し、前記突条の突出高さよりも大きい深さを有する凹溝が設けられており、
前記第２凸部の頂面と前記第１凹部の底面とにより前記金属板材を圧縮荷重により成形する一方、前記第１凸部の頂面と第２凹部の底面とにより前記金属板材を圧縮荷重により成形するに先立ち、前記突条を支点として曲げ応力を作用させる、
燃料電池用セパレータの製造方法。 A first forming die in which a pair of first recesses provided across the first protrusion and the first protrusion is extended, a pair of second protrusions facing each of the first recesses, and By pressing the metal plate material with a second forming die provided between each of the second convex portions and in which the second concave portions respectively opposed to the first convex portions are extended, a large number of grooves are formed on both surfaces thereof A method of manufacturing a fuel cell separator that forms
The bottom surface of the second recess is provided with a protrusion extending along the extending direction of the second recess,
On the top surface of the first convex portion, there is a concave groove facing the ridge and extending along the extending direction of the first convex portion, and having a depth greater than the height of projection of the ridge Provided,
The metal plate is formed with a compression load by the top surface of the second protrusion and the bottom of the first recess, and the metal plate is compressed by the top of the first protrusion and the bottom of the second recess. Bending stress is applied to the ridges as a fulcrum prior to molding by
A method of manufacturing a fuel cell separator.
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Cited By (2)
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| CN112421068A (en) * | 2020-10-19 | 2021-02-26 | 国科微城市智能科技(南京)有限责任公司 | Manufacturing equipment for hydrogen fuel cell and operation method |
| CN113458247A (en) * | 2020-03-31 | 2021-10-01 | 本田技研工业株式会社 | Continuous feed press method and device, and method and device for manufacturing separator for fuel cell |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001196079A (en) * | 2000-01-14 | 2001-07-19 | Toyota Motor Corp | Continuous recess and projection plate and forming device thereof and forming method thereof |
| JP2010264495A (en) * | 2009-05-15 | 2010-11-25 | Denso Corp | Bending method and working device |
| JP2014213345A (en) * | 2013-04-24 | 2014-11-17 | トヨタ紡織株式会社 | Method and device for molding sheet metal |
| WO2014208244A1 (en) * | 2013-06-25 | 2014-12-31 | 日産自動車株式会社 | Device and method for forming thin-plate substrate |
| WO2015198825A1 (en) * | 2014-06-24 | 2015-12-30 | 新日鐵住金株式会社 | Fine mold for molding fuel cell separator, method for manufacturing fuel cell separator, and fuel cell separator |
| JP2016182606A (en) * | 2015-03-25 | 2016-10-20 | 日新製鋼株式会社 | Manufacturing method for continuous waveform product |
-
2017
- 2017-12-26 JP JP2017249475A patent/JP6927025B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001196079A (en) * | 2000-01-14 | 2001-07-19 | Toyota Motor Corp | Continuous recess and projection plate and forming device thereof and forming method thereof |
| JP2010264495A (en) * | 2009-05-15 | 2010-11-25 | Denso Corp | Bending method and working device |
| JP2014213345A (en) * | 2013-04-24 | 2014-11-17 | トヨタ紡織株式会社 | Method and device for molding sheet metal |
| WO2014208244A1 (en) * | 2013-06-25 | 2014-12-31 | 日産自動車株式会社 | Device and method for forming thin-plate substrate |
| WO2015198825A1 (en) * | 2014-06-24 | 2015-12-30 | 新日鐵住金株式会社 | Fine mold for molding fuel cell separator, method for manufacturing fuel cell separator, and fuel cell separator |
| JP2016182606A (en) * | 2015-03-25 | 2016-10-20 | 日新製鋼株式会社 | Manufacturing method for continuous waveform product |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113458247A (en) * | 2020-03-31 | 2021-10-01 | 本田技研工业株式会社 | Continuous feed press method and device, and method and device for manufacturing separator for fuel cell |
| CN112421068A (en) * | 2020-10-19 | 2021-02-26 | 国科微城市智能科技(南京)有限责任公司 | Manufacturing equipment for hydrogen fuel cell and operation method |
| CN112421068B (en) * | 2020-10-19 | 2021-11-30 | 国科微城市智能科技(南京)有限责任公司 | Manufacturing equipment for hydrogen fuel cell and operation method |
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