JP2018176285A - Non-penetration joint structure of metallic component - Google Patents
Non-penetration joint structure of metallic component Download PDFInfo
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- JP2018176285A JP2018176285A JP2018152410A JP2018152410A JP2018176285A JP 2018176285 A JP2018176285 A JP 2018176285A JP 2018152410 A JP2018152410 A JP 2018152410A JP 2018152410 A JP2018152410 A JP 2018152410A JP 2018176285 A JP2018176285 A JP 2018176285A
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- 238000005304 joining Methods 0.000 claims abstract description 130
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 20
- 230000000149 penetrating effect Effects 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 6
- 238000005482 strain hardening Methods 0.000 claims description 5
- 239000007769 metal material Substances 0.000 abstract description 4
- 230000035515 penetration Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 49
- 238000012986 modification Methods 0.000 description 10
- 230000004048 modification Effects 0.000 description 10
- 239000002131 composite material Substances 0.000 description 8
- 238000003825 pressing Methods 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 229910052744 lithium Inorganic materials 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000003405 preventing effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
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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
- Y02E60/10—Energy storage using batteries
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- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
本発明は、金属材料でなる接合部材と被接合部材とを気密性を高くして接合してなる金属部材の非貫通接合構造に関するものである。 The present invention relates to a non-penetrating joint structure of a metallic member formed by joining a joining member made of a metal material and a joining member with high airtightness.
従来、金属材料でなる接合部材と被接合部材とを接合して複合部品を製造する場合には、当該接合部材の用途によってはその接合個所の気密性が要求されている。例えば、リチウム電池にあっては、電極端子に溶接等によりリード線等を取付けることから、電極端子には導電率の高い銅部材と耐食性の高いアルミ部材とを接合した複合部品が使用されている。通常、この種の複合部品の製造にあっては、一般的なかしめによる締結方法が用いられている。すなわち、溶接等の処理がされる部材を平板部材とし、この平板部材に貫通穴を穿設しておき、他方の部材を小径部が形成された段付き形状として、前述の貫通穴にこの小径部を差し込んでこの小径部をかしめることにより、両部材が接合されている。 Conventionally, in the case of manufacturing a composite part by joining a joining member made of a metal material and a joining member, depending on the application of the joining member, airtightness of the joining portion is required. For example, in a lithium battery, since a lead wire or the like is attached to an electrode terminal by welding or the like, a composite component in which a copper member having a high conductivity and an aluminum member having a high corrosion resistance are used is used for the electrode terminal. . Usually, in the production of composite parts of this type, a general caulking fastening method is used. That is, a member to be subjected to a process such as welding is a flat plate member, a through hole is bored in the flat plate member, and the other member is a stepped shape having a small diameter portion. Both members are joined by inserting the part and caulking this small diameter part.
この種の複合部品を電解液が充満するリチウム電池の外部電極端子として使用すると、経年劣化によりかしめ個所である接合部から電解液が漏洩する恐れがある。これを防止するため、図１１（ａ）に示すように袋穴１０５ａを持つアルミ部材でなる平板部材１０５と、図１１（ｂ）に示す突部１０４ｃを持つ銅部材でなる棒状の接合部材１０４とをあらかじめ成形しておき、その後に両部材を接合する方法が用いられている。 When this kind of composite part is used as an external electrode terminal of a lithium battery filled with an electrolytic solution, there is a risk that the electrolytic solution may leak from a joint portion which is a caulked portion due to aging deterioration. In order to prevent this, as shown in FIG. 11A, a flat plate member 105 made of an aluminum member having a blind hole 105a and a rod-like joint member 104 made of a copper member having a projection 104c shown in FIG. In the prior art, there is used a method in which the members are formed in advance and then the two members are joined.
具体的には、図１１（ｃ）に示すように接合部材１０４を受け型１０６内に位置決めした状態で、その突部１０４ｃに平板部材１０５の袋穴１０５ａ（図１１（ａ）参照）が嵌合するように平板部材１０５がプレス機により押圧される。この接合方法により、接合個所は平板部材１０５の袋穴１０５ａ内となるので、気密性の高い複合部品が製造される。そのため、液体が充満されたリチウム電池（図２参照）１の電池缶１ｂのような密閉された内部に通じる個所に当該複合部品を外部電源端子３として使用しても、接合個所から液体が漏洩する恐れは皆無となっている。 Specifically, as shown in FIG. 11C, in the state where the joining member 104 is positioned in the receiving mold 106, the blind hole 105a (see FIG. 11A) of the flat plate member 105 is fitted in the projection 104c. The flat plate member 105 is pressed by the press machine so as to be engaged. By this joining method, the joining point is in the blind hole 105a of the flat plate member 105, so that a highly airtight composite part is manufactured. Therefore, even if the composite component is used as the external power supply terminal 3 at a location leading to a sealed interior such as the battery can 1b of the lithium battery (see FIG. 2) filled with the fluid, the fluid leaks from the joint There is nothing to fear.
しかしながら、前述の金属部材の接合方法にあっては、棒状の接合部材１０４から平板部材１０５が抜け落ちないようにするため、接合部材１０４には図１１（ｂ）に示すように平板部材１０５の押圧時にその余肉が回り込む溝部１０４ａを加工しておかねばならない。そのため、接合部材１０４の構造が複雑となるばかりか、接合部材１０４、平板部材１０５それぞれの製造工程のほかに、この接合部材１０４と平板部材１０５とを接合する接合工程が必要で、複合部品の製造コストが高くなるという問題が生じている。 However, in the above-described joining method of the metal members, in order to prevent the flat plate member 105 from falling off from the rod-like joining member 104, the joining member 104 is pressed by the flat plate member 105 as shown in FIG. Sometimes it is necessary to process the groove part 104a which the excess thickness turns around. Therefore, not only the structure of the joining member 104 becomes complicated, but in addition to the manufacturing process of each of the joining member 104 and the flat plate member 105, a joining step of joining the joining member 104 and the flat plate member 105 is required. There is a problem that the manufacturing cost is high.
本発明は、非貫通接合構造である。この非貫通接合構造は、突部を有する金属製の接合部材と、前記接合部材の突部を挿入可能な袋穴を有する被接合部材と、前記接合部材の突部を被接合部材の袋穴に挿入した状態で被接合部材を圧縮し、被接合部材を介して接合部材を塑性変形させることにより、接合部材の突部の上端外周に背面が斜めに変形して形成されるアンダーカット部と、塑性変形に伴い前記アンダーカット部の背面に回り込み、両部材同士を抜脱不能に接合する被接合部材の余肉と、を備えることを特徴としている。この構成により、接合部材のアンダーカット部が被接合部材の余肉の回り込む溝を形成することとなり、被接合部材の抜け止め効果がもたらされる。また、接合部材のアンダーカット部の背面により被接合部材の余肉がかしめられる状態となり、これら部材の密着性が向上して大きな軸線方向の強度が得られる。さらに、接合個所が穴部内で非貫通状態であるので、気密性の高い接合構造が得られる。 The present invention is a non-penetrating junction structure. In this non-penetrating joint structure, a metal joint member having a projection, a joined member having a blind hole into which the projection of the joint member can be inserted, and a blind hole of the joint member And the undercut portion formed on the outer periphery of the upper end of the upper end of the projection of the joining member by compressing the joining member in a inserted state and plastically deforming the joining member via the joining member and It is characterized by including an excess thickness of a member to be joined, which wraps around the back surface of the undercut portion with plastic deformation and joins both members in a non-extractable manner. With this configuration, the undercut portion of the joining member forms a groove around which the excess thickness of the joined member is wound, thereby providing a retention preventing effect of the joined member. Further, the excess thickness of the members to be joined is crimped by the back surface of the undercut portion of the joining member, and the adhesion of these members is improved, and a large axial strength can be obtained. Furthermore, since the joint portion is not penetrated in the hole, a highly airtight joint structure is obtained.
また、本発明の非貫通接合構造は軸方向の強さ、すなわち抜き強度を大きくするために、前記アンダーカット部において被接合部材と接合部材を密着させる構成であることが望ましい。 Further, in the non-penetrating junction structure of the present invention, in order to increase the strength in the axial direction, that is, the punching strength, it is preferable that the member to be joined and the joining member be in close contact at the undercut portion.
本発明に係る被接合部材は、被接合部材の流動性をよくして、被接合部材と接合部材との密着性を向上させるために、接合部材よりも柔らかい材料でなり、被接合部材の加工硬化を利用して接合部材の突部の変形を引き起こす構成であることが望ましい。 The to-be-joined member which concerns on this invention becomes a material softer than a joining member, in order to improve fluidity | liquidity of a to-be-joined member and to improve the adhesiveness of a to-be-joined member and a joining member. It is desirable that the curing be used to cause deformation of the projection of the joining member.
本発明に係る突部は、回転方向の抵抗を大きくして、大きな回転方向の強度を得るために、突端近傍に拡広した段部を有し、当該段部の外周が歯形状をなすことが望ましい。 The protrusion according to the present invention has a step portion which is widened in the vicinity of the tip end in order to increase the resistance in the rotation direction and to obtain the strength in the large rotation direction, and the outer periphery of the step portion has a tooth shape. Is desirable.
以上説明した本発明によれば、金属材料でなる接合部材と被接合部材とを気密性を高くしてかつ安価に接合してなる金属部材の非貫通接合構造を提供することができる。 According to the present invention described above, it is possible to provide a non-penetrating joint structure of a metal member formed by joining a joining member made of a metal material and a joining member with high airtightness and inexpensively.
（第１の実施形態）
以下、本発明の第１の実施形態に関連する金属部材の非貫通接合方法（以下、第１接合方法という）を図面に基づき説明する。図２に示すように、１は第１接合方法により製造される複合部品を外部電極端子として使用する用途の一例を示すリチウム電池である。このリチウム電池１は複数枚の電池パック１ａを収納する電池缶１ｂを有し、この電池缶１ｂの上面には正極側外部電極端子（図示せず）と負極側外部電極端子（以下、負側外部端子という）３とが取付けられている。前記電池パック１ａは上端に正、負の各電極端子１ａ１，１ａ２を有し、隣接する電池パック１ａ，１ａの一方の負電極端子１ａ２と他方の電池パック１ａの正電極端子１ａ１間にはバスバー１ｃが接続され、複数の電池パック１ａが直列に接続されている。また、最後列の電池パック１ａの負電極端子１ａ２にもバスバー１ｃが連接されており、このバスバー１ｃの端部には前述の負側外部端子３が接続されている。
First Embodiment
Hereinafter, a non-penetrating bonding method (hereinafter, referred to as a first bonding method) of a metal member related to a first embodiment of the present invention will be described based on the drawings. As shown in FIG. 2, 1 is a lithium battery which shows an example of the use which uses the composite component manufactured by a 1st joining method as an external electrode terminal. The lithium battery 1 has a battery can 1b for containing a plurality of battery packs 1a, and a positive electrode side external electrode terminal (not shown) and a negative electrode side external electrode terminal (hereinafter referred to as negative side) The external terminal 3) is attached. The battery pack 1a has positive and negative electrode terminals 1a1 and 1a2 at its upper end, and a bus bar is provided between one negative electrode terminal 1a2 of the adjacent battery pack 1a and 1a and the positive electrode terminal 1a1 of the other battery pack 1a. 1c is connected, and a plurality of battery packs 1a are connected in series. The bus bar 1c is also connected to the negative electrode terminal 1a2 of the battery pack 1a in the last row, and the above-mentioned negative external terminal 3 is connected to the end of the bus bar 1c.
前記負側外部端子３は、図５に示すように銅部材でなる接合部材４と、この接合部材４よりも柔らかいアルミ部材でなる被接合部材５とからなっている。前記接合部材４は、棒状の軸部４ａと、外形状が非円形状の一例である歯形状の段部４ｂと、これに連続しかつこれから突出する突部４ｃとを有している。前記段部４ｂは、突部４ｃの突端近傍に拡広しており、その外周囲で回転方向の摩擦抵抗を確保している。また、前記被接合部材５は前記接合部材４の段部４ｂおよび突部４ｃを覆う所定厚さの平板部５ｂを有するが、図３（ａ）および（図３（ｂ）に示すように当該成形が行われる前には前述の接合部材４の段部４ｂおよび突部４ｃが嵌合可能な穴部５ａを有している。前記負側外部端子３は、図４（ａ）および図４（ｂ）並びに図５に示すように被接合部材５の袋穴５ａ内に接合部材４の段部４ｂおよび突部４ｃが位置するように被接合部材５を接合部材４に被せ、後記受け型６との間で被接合部材５を圧縮することにより被接合部材５と接合部材４を同時に塑性変形させて、接合部材４に背面が斜めに変形したアンダーカット部４ｃｃを形成しつつそのアンダーカット部４ｃｃに被接合部材５の余肉を回り込ませて、両部材同士を抜脱不能に接合する非貫通接合構造Ｓを有している。 As shown in FIG. 5, the negative side external terminal 3 is composed of a bonding member 4 made of a copper member and a bonding member 5 made of an aluminum member softer than the bonding member 4. The joint member 4 has a rod-like shaft 4a, a tooth-shaped step 4b whose outer shape is an example of a non-circular shape, and a protrusion 4c continuous with and protruding from this. The stepped portion 4b is expanded in the vicinity of the end of the protrusion 4c, and the frictional resistance in the rotational direction is secured around the outer periphery thereof. Further, although the to-be-joined member 5 has a flat plate portion 5b of a predetermined thickness which covers the step 4b and the projection 4c of the joining member 4, as shown in FIGS. 3 (a) and 3 (b), Before the molding is performed, there is a hole 5a to which the step 4b and the projection 4c of the above-mentioned joint member 4 can be fitted.The negative side external terminal 3 is shown in FIGS. (B) As shown in FIG. 5 and FIG. 5, the joining member 5 is placed on the joining member 4 so that the step 4b and the projection 4c of the joining member 4 are positioned in the blind hole 5a of the joining member 5. 6, the joint member 5 and the joint member 4 are simultaneously plastically deformed by compressing the joint member 5 to form the undercut portion 4cc in which the rear face is diagonally deformed in the joint member 4 while the undercut portion is formed. The excess thickness of the member 5 to be joined is made to turn around 4cc, making it impossible to remove both members And a non-penetrating bonding structure S to focus.
前述の構造により、接合部材４のアンダーカット部４ｃｃが被接合部材５の余肉の回り込む溝を形成することとなり、被接合部材５の抜け止め効果がもたらされる。また、接合部材４のアンダーカット部４ｃｃの背面により被接合部材５の余肉がかしめられる状態となり、これら部材の密着性が向上して大きな軸線方向の強度が得られる。さらに、被接合部材５の余肉が段部４ｂの歯形状の空隙に回り込むことにより回転方向の抵抗が大きくなり、大きな回転方向の強度が得られるばかりか、接合個所が穴部５ａ内で非貫通状態であるので、気密性の高い接合構造が得られる。これにより、当該負側外部端子３は液体が充満されるリチウム電池１の電池缶１ｂのような密閉される内部に通じる個所で使用されても、液体が漏洩することはない。同時に、リード線等を溶着するスペースを十分に確保でき、しかもその耐食性も確保できる平板部５ｂを得ることができる。その他、被接合部材５が接合部材４よりも柔らかい部材であることから、被接合部材５の流動性がよく、前述の密着性をさらに向上させることができる。なお、接合部材４および被接合部材５は同一材質であっても前記密着性向上の程度は異なるが、同様の効果が得られる。 With the above-described structure, the undercut portion 4 cc of the joining member 4 forms a groove in which the excess thickness of the joined member 5 wraps around, and the retaining effect of the joined member 5 is brought about. Further, the remaining thickness of the member 5 to be joined is crimped by the back surface of the undercut portion 4 cc of the joining member 4, and the adhesion of these members is improved, and a large axial strength can be obtained. Furthermore, the excess thickness of the member 5 to be joined wraps around the tooth-shaped gap of the step 4b to increase the resistance in the rotational direction, and not only the strength in the large rotational direction can be obtained. Because of the penetration state, a highly airtight junction structure can be obtained. Thereby, the liquid does not leak even when the negative side external terminal 3 is used at a place leading to the sealed interior such as the battery can 1 b of the lithium battery 1 filled with the liquid. At the same time, it is possible to obtain a flat plate portion 5b which can secure a sufficient space for welding lead wires and the like and moreover can ensure its corrosion resistance. In addition, since the to-be-joined member 5 is a member softer than the joining member 4, the fluidity of the to-be-joined member 5 is good, and the aforementioned adhesion can be further improved. Even if the bonding member 4 and the bonding member 5 are made of the same material, the degree of improvement in the adhesion is different, but the same effect can be obtained.
前記負側外部端子３は、図１、図３および図４に示す第１接合方法により製造されている。すなわち、この第１接合方法は接合部材４の製造工程（図示せず）と、被接合部材５の製造工程（図示せず）とを有している。また、この第１接合方法は図４（ａ）に示すように接合部材４の段部４ｂおよび突部４ｃが被接合部材５の穴部５ａに嵌合するように被接合部材５を接合部材４に被せる嵌合工程と、図４（ｂ）に示すように被接合部材５を圧縮して仕上げ成形前の予備形状でなる予備成形部５ｃを成形する予備成形工程と、接合部材４の突部４ｃが露出しない範囲で被接合部材５の予備成形部５ｃを平板状に成形する成形工程とからなっている。前記嵌合工程は、接合部材４の軸部４ａを受け型６内でノックアウトピン７により位置決めし、その上方から接合部材４の段部４ｂおよび突部４ｃが被接合部材５の袋穴５ａ内に位置するように被接合部材５を接合部材４に被せ、これらを嵌合させるように構成されている（図４（ａ）参照）。この場合、被接合部材５の前進方向は、上方からに限定されるものではなく、接合部材４と被接合部材５を横方向に配置することにより水平方向からとすることもできる。 The negative side external terminal 3 is manufactured by the first bonding method shown in FIG. 1, FIG. 3 and FIG. That is, the first bonding method includes a manufacturing process (not shown) of the bonding member 4 and a manufacturing process (not shown) of the workpiece 5. Moreover, as shown in FIG. 4A, in the first bonding method, the joining member 5 is joined so that the step 4b and the projection 4c of the joining member 4 are fitted in the hole 5a of the joined member 5 4 and a pre-forming step of forming a pre-formed portion 5c having a pre-formed shape before finish-forming by compressing the member 5 to be joined as shown in FIG. 4 (b); It consists of the forming process which shape | molds the preforming part 5c of the to-be-joined member 5 in flat form in the range which the part 4c does not expose. In the fitting step, the shaft portion 4 a of the joint member 4 is positioned in the receiving mold 6 by the knockout pin 7, and the step 4 b and the projection 4 c of the joint member 4 are in the blind hole 5 a of the joint member 5 from above. It is comprised so that the to-be-joined member 5 may be covered on the joining member 4 so that it may be located, and these may be fitted (refer Fig.4 (a)). In this case, the advancing direction of the member 5 to be joined is not limited to from above, but can be made from the horizontal direction by arranging the joining member 4 and the member 5 to be joined in the lateral direction.
前記被接合部材５の予備成形工程は、図４（ｂ）に示すように接合部材４の段部４ｂおよび突部４ｃに嵌合する被接合部材５を仕上げ成形前の予備形状でなる予備成形部５ｃに成形する予備成形押し型（図示せず）を有している。この予備成形押し型は、受け型６に対して前進して被接合部材５の上部を予備成形押し型で圧縮し、予備成形押し型に形成される成形穴、すなわち予備形状に対応する予備成形部５ｃを成形する。この時、接合部材４の段部４ｂおよび突部４ｃと被接合部材５の穴部５ａの内壁との間隙に被接合部材５の余肉が回り込み、接合部材４の軸部４ａを受け型６で保持した状態でこれら部材が接合される。これにより、被接合部材５が延性の良好な材質でないときでも、成形工程での被接合部材５の確実な成形を補助している。この予備成形工程は、第１接合方法にあっては必須の工程ではなく、被接合部材５が延性の良好な柔らかい金属部材でなるときには、被接合部材５を嵌合工程から直接成形工程で成形してもよい。 In the preforming step of the member 5 to be joined, as shown in FIG. 4 (b), the preformed member is formed into a preliminary shape before finish forming, the member 5 to be fitted to the step 4b and the projection 4c of the joining member 4 being finished. It has a preforming die (not shown) molded into the part 5c. The preforming die is advanced with respect to the receiving die 6 to compress the upper portion of the workpiece 5 with the preforming die and to form a forming hole formed in the preforming die, ie, a preforming shape corresponding to the preforming shape Form part 5c. At this time, the excess thickness of the member 5 to be joined wraps around the gap between the step 4 b and the projection 4 c of the joining member 4 and the inner wall of the hole 5 a of the joined member 5. These members are joined while being held by Thereby, even when the to-be-joined member 5 is not a ductile good material, reliable shaping | molding of the to-be-joined member 5 in a formation process is assisted. This preliminary forming step is not an essential step in the first bonding method, and when the member to be joined 5 is made of a ductile good soft metal member, the member to be joined 5 is formed directly from the fitting step You may
前記成形工程は、図１に示すように被接合部材５の予備成形部５ｃから所定厚さの平板部５ｂを成形するための成形押し型（図示せず）を有している。この成形押し型は、前記予備成形部５ｃに対して上方から前進して予備成形部５ｃを所定の厚さまたは所定厚さと所定形状とを備える平板部５ｂに成形する。この時、成形押し型の下死点は平板部５ｂの厚さ、被接合部材５の延性、接合部材４の突部４ｃと被接合部材５の穴部５ａとの嵌合深さ、接合部材４の硬度等から接合部材４の突部４ｃが露出しないように考慮されている。 The forming step has a forming die (not shown) for forming a flat plate portion 5b of a predetermined thickness from the preformed portion 5c of the joined member 5 as shown in FIG. The forming die is advanced from above with respect to the preformed portion 5c to form the preformed portion 5c into a flat plate portion 5b having a predetermined thickness or a predetermined thickness and a predetermined shape. At this time, the bottom dead center of the forming die is the thickness of the flat plate portion 5b, the ductility of the joined member 5, the fitting depth of the projection 4c of the joining member 4 and the hole 5a of the joined member 5, the joining member It is considered from the hardness of 4 etc. that the protrusion 4c of the joining member 4 is not exposed.
上記第１接合方法において、図４（ａ）に示すように受け型６内で接合部材４の軸部４ａがノックアウトピン７により位置決めされ、同時にその段部４ｂが受け型６の上面で保持される。その後、被接合部材５がその穴部５ａを接合部材４の段部４ｂおよび突部４ｃに嵌合させるように前進した後に、図４（ｂ）に示すように予備成形押し型が受け型６に対して前進し、被接合部材５の上部を圧縮して予備成形部５ｃを成形する。この時、予備成形押し型が接合部材４よりも柔らかい被接合部材５を介して接合部材４の突部４ｃを塑性変形させ、その上端外周をわずかに外方に扁平させ、接合部材４にアンダーカット部４ｃｃを形成しつつそのアンダーカット部４ｃｃに被接合部材５の余肉を回り込ませる。 In the first bonding method, as shown in FIG. 4A, the shaft 4a of the bonding member 4 is positioned by the knockout pin 7 in the receiving mold 6, and at the same time, the step 4b is held by the upper surface of the receiving mold 6. Ru. Thereafter, after the member 5 to be joined is advanced so that the hole 5a is fitted to the step 4b and the projection 4c of the joining member 4, the pre-formed pressing die is received as shown in FIG. The upper part of the workpiece 5 is compressed to form the preformed part 5c. At this time, the preforming pressing die plastically deforms the projection 4c of the joining member 4 via the joined member 5 which is softer than the joining member 4, and flattens the outer periphery of the upper end slightly outward. While forming the cut portion 4 cc, the excess thickness of the member 5 to be joined is caused to go around the undercut portion 4 cc.
前記予備成形押し型を後退させた後に、図１に示すように成形押し型が受け型６に対して所定下死点まで前進する。この成形押し型の前進にともなって、成形押し型が前記予備成形部５ｃを圧縮して所定厚さの平板部５ｂを成形する。この時、予備成形部５ｃ、すなわち被接合部材５は接合部材の突部４ｃが露出しないように成形され、同時に接合部材４と被接合部材５とが抜脱不能に接合される。しかも、これら部材は非貫通接合状態で、すなわち接合個所の気密性を保持して接合される。この時、外周が歯形状となっている段部４ｂの間隙には、予備成形部５ｃ、すなわち被接合部材５の余肉が回り込んで、平板部５ｂの首下には大円柱段部４ｂ１が形成されて回転方向の抵抗が大きくなる。これにより、接合部材４の段部４ｂの外周囲の摩擦抵抗に加えて、予備成形部５ｃの余肉が歯形状の段部の間隙に回り込むことによる回転方向の抵抗が大きくなり、回転方向の強度が向上する。 After the preforming die is retracted, the forming die is advanced relative to the receiving die 6 to a predetermined bottom dead center as shown in FIG. As the forming die advances, the forming die compresses the preformed part 5c to form the flat plate part 5b having a predetermined thickness. At this time, the preforming portion 5c, that is, the member 5 to be joined is formed so that the projection 4c of the joining member is not exposed, and at the same time, the joining member 4 and the member 5 to be joined are irremovably joined. Moreover, these members are joined in a non-penetrating junction state, that is, maintaining the airtightness of the junction. At this time, the excess thickness of the preformed portion 5c, ie, the member 5 to be joined, gets into the gap of the step 4b whose outer periphery has a tooth shape, and the large cylindrical step 4b1 is formed under the neck of the flat portion 5b. Is formed to increase the resistance in the rotational direction. Thereby, in addition to the frictional resistance of the outer periphery of the step portion 4b of the joining member 4, the resistance in the rotational direction is increased due to the excess thickness of the preformed portion 5c coming into the gap of the step portion of the tooth shape. Strength is improved.
前記平板部５ｂの成形時には、前記成形押し型が予備成形部５ｃを介して接合部材４の突部４ｃを塑性変形させ、その上端外周がさらに外方に扁平し、アンダーカット部４ｃｃが成形される。この間、接合部材４のアンダーカット部４ｃｃがその背部で予備成形部５ｃの余肉をかしめるとともに、この余肉を接合部材４の段部４ｂと予備成形部５ｃとの間隙に回り込ませることができる。この時、前記アンダーカット部４ｃｃにあっては、被接合部材５による接合部材４の突部４ｃの圧縮と接合部材によるかしめとによって接合部材４と被接合部材５とが接合されることとなるので、両部材間に間隙が生じることなく、高い密着性が得られる。これは、図６（ａ）に示すように実際の接合部材４と被接合部材５との接合個所の拡大切断写真からも明確となっている。すなわち、図６（ｂ）に示す従来方法に係る接合個所の拡大断面写真では、当該接合個所の所どころに間隙（境界部分の黒色部）が認められ、余肉の回りが十分でないことが窺がえる。これに対して、第１接合方法に係る接合個所には隙間が認められず、余肉は十分に回り込んで接合部材４と被接合部材５との間で高い密着性が得られていることが窺がえる。特に、図６（ａ）の被接合部材５にはＡ１０７０のアルミ部材を、また接合部材４には銅部材を使用し、被接合部材５を
接合部材４よりも柔らかい材料とすることにより、被接合部材５の加工硬化を利用して接合部材４の変形を引き起こすことになるので、被接合部材５の流動性がよくなって接合部材４と被接合部材５との良好な密着性が顕著に現れる。
At the time of forming the flat plate portion 5b, the forming press mold plastically deforms the protrusion 4c of the joint member 4 through the preforming portion 5c, the upper end outer periphery is further flattened outward, and the undercut portion 4cc is formed. Ru. During this time, the undercut portion 4 cc of the joining member 4 caulks an excess thickness of the preformed portion 5 c at its back, and allows the excess thickness to wrap around the gap between the step portion 4 b of the joining member 4 and the preformed portion 5 c. it can. At this time, in the undercut portion 4cc, the joining member 4 and the joined member 5 are joined by the compression of the projection 4c of the joining member 4 by the joined member 5 and the caulking by the joining member. Therefore, high adhesion can be obtained without any gap between the two members. This becomes clear also from the expansion cutting picture of the junction part of the actual joining member 4 and the to-be-joined member 5 as shown to Fig.6 (a). That is, in the enlarged cross-sectional photograph of the joint according to the conventional method shown in FIG. 6 (b), a gap (black portion at the boundary) is recognized in the place of the joint, and the excess thickness is not sufficient. It sounds. On the other hand, no gap is observed at the junctions related to the first joining method, and the excess thickness is sufficiently wrapped around to obtain high adhesion between the joining member 4 and the joined member 5. I admire you. In particular, by using an aluminum member of A 1070 for the member to be joined 5 of FIG. 6A and a copper member for the joining member 4, the object 5 to be joined is made softer than the joining member 4. Since the deformation of the joining member 4 is caused by utilizing the work hardening of the joining member 5, the flowability of the joining member 5 is improved and the good adhesion between the joining member 4 and the joining member 5 is remarkable. appear.
なお、上記説明は、第１接合方法において、接合部材４に従来技術の溝部１０４ａを予め成形しておくことを積極的に排除するものではない。 Note that the above description does not positively exclude the prior art groove portion 104 a from being formed in advance in the bonding member 4 in the first bonding method.
また、図１に示すように前記接合部材４のアンダーカット部４ｃｃの背部は予備成形部５ｃの余肉を接合部材４の段部４ｂおよび受け型６の上面との間でかしめることとなって当該余肉を加工硬化させながら、接合部材４の段部４ｂおよび突部４ｃと予備成形部５ｃとの間隙側に押し込む。これにより、接合部材４に当該余肉が回り込むための溝加工等の抜け止め加工をあらかじめ施すことなく、両部材同士を抜脱不能に接合することができる。そのため、接合部材４は単純な構造でよいばかりか、前記余肉の加工硬化と相俟って接合部材４の軸線方向の強度、すなわち抜き方向の強度を高めることができる。これは、図
７（ａ）に示すように第１接合方法に係る抜き強度が２．５Ｎ以上であるのに対して、図７（ｂ）に示すように従来方法に係る抜き強度が２．０Ｎ以下であることから明確となっている。
Further, as shown in FIG. 1, the back of the undercut portion 4cc of the joint member 4 caulks the excess thickness of the preforming portion 5c between the step portion 4b of the joint member 4 and the upper surface of the receiving die 6. The work piece is pushed into the gap between the step portion 4b and the projection 4c of the joint member 4 and the preformed portion 5c while work hardening the excess thickness. As a result, the two members can be joined together in a non-removable manner without performing in advance removal processing such as groove processing or the like for causing the surplus thickness to wrap around the bonding member 4. Therefore, the joining member 4 may not only have a simple structure, but can also increase the strength in the axial direction of the joining member 4, that is, the strength in the extraction direction, in combination with the work hardening of the excess thickness. This is because the punching strength according to the first bonding method is 2.5 N or more as shown in FIG. 7 (a), while the punching strength according to the conventional method is 2.N as shown in FIG. 7 (b). It is clear that it is less than 0 N.
さらに、前記成形押し型は所定下死点まで前進して被接合部材５の予備成形部５ｃから所定厚さの平板部５ｂを成形するが、その際に被接合部材５の延性、接合部材４の突部４ｃと被接合部材５の穴部５ａとの嵌合深さ等から接合部材４の突部４ｃが露出しないように考慮されている。これにより、接合部材４の突部４ｃが露出することなく、接合部材４と被接合部材５とは非貫通接合状態、すなわち接合個所の気密性を保持して接合され、気密性の高い負側外部端子３を製造することができる。また、被接合部材５をあらかじめ成形しておく工程が不要となるので、安価な負側外部端子３を製造することができる。 Further, the forming and pressing die is advanced to a predetermined bottom dead center to form a flat plate portion 5b having a predetermined thickness from the preformed portion 5c of the joined member 5, but at that time, the ductility of the joined member 5, the joining member 4 It is considered from the fitting depth or the like between the projection 4c of the second embodiment and the hole 5a of the joined member 5 that the projection 4c of the joining member 4 is not exposed. As a result, the projection 4c of the joining member 4 is not exposed, and the joining member 4 and the joining member 5 are joined in a non-penetrating joining state, that is, the airtightness of the joining portion is maintained. The external terminal 3 can be manufactured. In addition, since the step of previously molding the member 5 to be joined is not necessary, the inexpensive negative side external terminal 3 can be manufactured.
図８は、本発明の第１接合方法の第１変形例（ａ）、第２変形例（ｂ）それぞれに係る非貫通接合構造Ｓ１，Ｓ２である。前記非貫通接合構造Ｓ１は、接合部材４の段部４ｂを受け型（図示せず）内に保持した状態で被接合部材５を成形して得られる構造である。また、この非貫通接合構造Ｓ１は受け型との間で被接合部材５を圧縮することにより被接合部材５と接合部材４とを同時に塑性変形させて、接合部材４に背面が斜めに変形したアンダーカット部４ｃｃを形成しつつそのアンダーカット部４ｃｃに被接合部材５の余肉を回り込ませて、両部材同士を抜脱不能に接合する構造である。前記被接合部材５が所定厚さの平板部５ｂを持つように成形される時、外周が歯形状となっている段部４ｂの間隙に、被接合部材５の余肉が回り込んで、平板部５ｂの首下に大円柱段部４ｂ１が形成される。 FIG. 8 shows non-penetrating junction structures S1 and S2 according to the first modification (a) and the second modification (b) of the first bonding method of the present invention, respectively. The non-penetrating junction structure S1 is a structure obtained by molding the joining member 5 in a state in which the stepped portion 4b of the joining member 4 is held in a receiving mold (not shown). Further, in the non-penetrating joint structure S1, the joint member 5 and the joint member 4 are simultaneously plastically deformed by compressing the joint member 5 with the receiving mold, and the rear surface is diagonally deformed in the joint member 4 While forming the undercut portion 4cc, the excess thickness of the member 5 to be joined is made to wrap around the undercut portion 4cc, and the two members are joined together in a non-extractable manner. When the to-be-joined member 5 is formed so as to have the flat plate portion 5b having a predetermined thickness, the excess thickness of the to-be-joined member 5 wraps around the gap of the step portion 4b whose outer periphery has a tooth shape. A large cylindrical step 4b1 is formed under the neck of the portion 5b.
また、前記非貫通接合構造Ｓ２は、接合部材４として段部４ｂと突部４ｃとの間に小円柱段部４ｂ２を有する部材を使用している。この非貫通接合構造Ｓ２は、前述の第１変形例とはこの小円柱段部４ｂ２の点で相違するのみで、その他は第１変形例と同構造である。これにより、いずれの非貫通接合構造Ｓ１，Ｓ２も、首下に大円柱段部４ｂ１を有していることから、接合部材４の段部４ｂの外周囲の摩擦抵抗に加えて、予備成形部５ｃの余肉が歯形状の段部の外周囲に回り込んで回転方向の抵抗が大きくなり、回転方向の強度が大きい負側外部端子３ａ，３ｂを得ることができる。 Further, the non-penetrating junction structure S2 uses, as the joining member 4, a member having a small cylindrical step 4b2 between the step 4b and the projection 4c. The non-penetrating junction structure S2 is different from the above-described first modification only in the small cylindrical stepped portion 4b2, and the other configurations are the same as the first modification. Thereby, in addition to the friction resistance of the outer periphery of the step 4b of the joining member 4, since any non-penetrating junction structure S1, S2 also has the large cylindrical step 4b1 under the neck, a preformed portion The excess thickness of 5c wraps around the outer periphery of the step portion of the tooth shape to increase the resistance in the rotational direction, and it is possible to obtain negative side external terminals 3a and 3b having high strength in the rotational direction.
図９（ａ）および図９（ｂ）は、本発明の第１接合方法の変形例に係る金属部材の接合方法を示すもので、この接合方法は接合部材４として軸部４ａとこれより膨径でかつその上面に非円形穴４ｃ２を有する接合突部４ｃ１とからなる部材を使用する。この接合方法は、この接合部材４の接合突部４ｃ１に被接合部材５の穴部５ａが嵌合するように接合部材４に被接合部材５をかぶせる嵌合工程と、被接合部材５の成形工程とからなっている。前記嵌合工程では、図９（ａ）に示すように接合部材４の接合突部４ｃ１を受け型６の上面に当接させながら、その軸部４ａが受け型６とノックアウトピン７により位置決めされる。この状態で、被接合部材５が受け型６内の接合部材４に対して前進し、その上方から接合部材４の突部４ｃが被接合部材５の袋穴５ａ内に位置するように被接合部材５を接合部材４に被せる。これにより、被接合部材５はその一部が接合部材４に嵌合することにより接合部材４に保持される。 FIGS. 9 (a) and 9 (b) show a method of bonding metal members according to a modification of the first bonding method of the present invention. A member having a diameter and a joint projection 4c1 having a non-circular hole 4c2 on the top surface is used. This joining method includes a fitting step of covering the joining member 4 with the joining member 4 so that the hole 5a of the joining member 5 is engaged with the joining projection 4c1 of the joining member 4, and forming the joining member 5 It consists of the process. In the fitting step, as shown in FIG. 9A, the shaft portion 4a is positioned by the receiving die 6 and the knockout pin 7 while contacting the upper surface of the receiving die 6 with the joint projection 4c1 of the joining member 4 Ru. In this state, the members to be joined 5 are advanced with respect to the joining members 4 in the receiving mold 6, and the projections 4c of the joining members 4 are positioned from above the members 4 in the blind holes 5a of the members 5 to be joined. The member 5 is put on the joining member 4. Thereby, the part to be joined 5 is held by the joining member 4 by fitting a part thereof to the joining member 4.
前記成形工程では、成形押し型（図示せず）が配置されており、図９（ｂ）に示すようにこの成形押し型が受け型６内で位置決めされた接合部材４とこれに嵌合する被接合部材５との上方からこれら部材に対して所定下死点まで前進する。この成形押し型の下死点は前述した第１接合方法に係る下死点と同様に被接合部材５が圧縮されて所定厚さの平板部５ｂが成形され、かつ接合突部４ｃ１が露出しないように考慮されて設定される。 In the forming step, a forming die (not shown) is disposed, and as shown in FIG. 9 (b), the forming die is fitted with the joint member 4 positioned in the receiving die 6 From the upper side of the member 5 to be joined, these members are advanced to a predetermined bottom dead center. The lower dead point of the forming die is compressed at the same time as the lower dead point according to the first bonding method described above, the to-be-joined member 5 is compressed to form the flat plate portion 5b of a predetermined thickness, and the joining projection 4c1 is not exposed As set in consideration.
前記成形押し型の前進にともなって、成形押し型が被接合部材５を圧縮して所定厚さの平板部５ｂが成形される。この時、被接合部材５を介して接合部材４の接合突部４ｃ１を塑性変形させ、その上端外周が外方に扁平し、背面が斜めに変形したアンダーカット部４ｃｃが成形される。この接合部材４の接合突部４ｃ１の成形と同時に、接合部材４と被接合部材５とが抜脱不能に接合され、しかもこれら部材は非貫通接合状態で、すなわち接合個所の気密性を保持して接合される。また、この成形工程では成形押し型が所定下死点まで前進する際には、被接合部材５を介して接合突部４ｃ１を塑性変形させるが、接合突部４ｃ１は非円形穴４ｃ２を有しているため、その全周にわたって外方に扁平し易く、アンダーカット部４ｃｃの成形が容易となっている。これにより、軸方向、すなわち抜き方向の強度を向上させることができる。
（第２の実施形態）
As the forming and pressing die advances, the forming and pressing die compresses the workpiece 5 to form the flat plate portion 5b having a predetermined thickness. At this time, the bonding projection 4c1 of the bonding member 4 is plastically deformed through the member to be bonded 5, the upper end outer periphery is flattened outward, and the undercut portion 4cc is formed in which the rear surface is deformed diagonally. Simultaneously with the formation of the joint projection 4c1 of the joint member 4, the joint member 4 and the joint member 5 are irremovably joined, and these members are in a non-penetrating joint state, that is, maintain airtightness of the joint. Jointed. Further, in this forming step, when the forming and pressing die advances to a predetermined bottom dead center, the joint projection 4c1 is plastically deformed through the joined member 5, but the joint projection 4c1 has a non-circular hole 4c2. Therefore, it is easy to flatten outward along the entire circumference, and molding of the undercut portion 4cc is easy. Thereby, the strength in the axial direction, that is, in the direction of extraction can be improved.
Second Embodiment
本発明の第２の実施形態に係る金属部材の非貫通接合方法（以下、第２接合方法という）を図面に基づき説明する（第１接合方法と同一部品、同一機能部品には同一の部品番号を付す）。図１０（ａ）、図１０（ｂ）および図１０（ｃ）において、第２接合方法は接合部材４と被接合部材５の嵌合工程、被接合部材５の予備成形工程、被接合部材５の成形工程からなっている。前記嵌合工程は、図１０（ａ）に示すように第１接合方法と同様の構成で、受け型６内に接合部材４の段部４ｂを保持する点および接合部材４の突部４ｃの形状の点で相違するのみであるので、この相違点について詳述する。前記突部４ｃは、受け型６の上面よりも上方に突出しており、その外周にはねじ山４ｅが形成されている。このねじ山４ｅには、その軸線に沿う方向に延びる縦溝４ｆが形成されている。なお、前記ねじ山４ｅに縦溝４ｆを設けなくてもよく、その場合には回転方向の強度が幾分低下するが、抜き強度に低下はない。 A non-penetrating bonding method of metal members according to a second embodiment of the present invention (hereinafter referred to as a second bonding method) will be described based on the drawings (the same parts as the first bonding method, the same part numbers for the same functional parts) Attached). 10 (a), 10 (b) and 10 (c), the second joining method is the fitting process of the joining member 4 and the joined member 5, the pre-forming step of the joined member 5, the joined member 5 The molding process of The fitting step has a configuration similar to that of the first bonding method as shown in FIG. 10A, in that the step 4b of the bonding member 4 is held in the receiving mold 6 and the protrusion 4c of the bonding member 4 The difference is only described in terms of the shape, so this difference will be described in detail. The projection 4c protrudes upward beyond the upper surface of the receiving mold 6, and a screw thread 4e is formed on the outer periphery thereof. The thread 4e is formed with a longitudinal groove 4f extending in a direction along the axis thereof. In addition, it is not necessary to provide the vertical groove 4f in the screw thread 4e. In this case, the strength in the rotational direction is somewhat reduced, but the extraction strength is not reduced.
前記予備成形工程では、被接合部材５の上部を圧縮する予備成形押し型（図示せず）が配置されている。この予備成形押し型は被接合部材５に対して前進し、図１０（ｂ）に示すように接合部材４の突部４ｃを塑性変形させない範囲で、被接合部材５の上部を圧縮して予備成形押し型に形成される予備形状に対応する予備成形部５ｃを成形する。この時、前記接合部材４の突部４ｃと被接合部材５との間隙および隣接する二つのねじ山４ｅ，４ｅ間並びに縦溝４ｆ内に被接合部材５の余肉が回り込む。 In the preforming step, a preforming die (not shown) for compressing the upper portion of the workpiece 5 is disposed. The preformed pressing die advances with respect to the workpiece 5 and compresses the upper portion of the workpiece 5 within a range not causing plastic deformation of the projection 4c of the workpiece 4 as shown in FIG. 10 (b). A preforming portion 5c corresponding to the preformed shape formed on the forming die is formed. At this time, the excess thickness of the member 5 to be joined wraps around the gap between the projection 4c of the joining member 4 and the member 5 to be joined, between two adjacent screw threads 4e and 4e, and in the longitudinal groove 4f.
前記成形工程では、成形押し型（図示せず）が配置されており、図１０（ｃ）に示すようにこの成形押し型が所定下死点まで前進して、予備成形部５ｃを圧縮して所定厚さの平板部５ｂを成形する。同時に、この成形押し型が接合部材４の突部４ｃの突端を塑性変形させて外方に扁平させ、背面が斜めに変形したアンダーカット部４ｃｃを成形する。これにより、第１接合方法と同様の効果が得られるばかりか、任意の長さの首下段部４ｂ３を持つ負側外部端子３ｃを製造することができる。また、抜き方向、押し込み方向の両方向の軸方向強度はもとより、縦溝４ｆに回り込む余肉により回転方向の強度を向上させることができる。 In the forming step, a forming die (not shown) is disposed, and as shown in FIG. 10 (c), the forming die advances to a predetermined bottom dead center to compress the preformed portion 5c. The flat plate portion 5b having a predetermined thickness is formed. At the same time, this forming and pressing die plastically deforms the projecting end of the projection 4c of the joining member 4 to flatten it outward, and forms the undercut portion 4cc whose back surface is deformed obliquely. Thus, not only an effect similar to that of the first bonding method can be obtained, but also it is possible to manufacture the negative external terminal 3c having the lower neck portion 4b3 of an arbitrary length. Moreover, the strength in the rotational direction can be improved by the excess thickness that goes around the longitudinal groove 4f as well as the axial strength in both the removal direction and the insertion direction.
本発明は、非貫通接合構造である突部４ｃを有する金属製の接合部材４と、前記接合部材４の突部４ｃを挿入可能な袋穴５ａを有する被接合部材５と、前記接合部材４の突部４ｃを被接合部材５の袋穴５ａに挿入した状態で被接合部材５を圧縮し、被接合部材５によって接合部材４を同時に塑性変形させることにより、接合部材４の突部４ｃの上端外周に背面が斜めに変形して形成されるアンダーカット部４ｃｃと、塑性変形に伴い前記アンダーカット部４ｃｃの背面に回り込み、両部材同士を抜脱不能に接合する被接合部材５の余肉と、を備えることを特徴としている。この構成により、接合部材４のアンダーカット部４ｃｃが被接合部材５の余肉の回り込む溝を形成することとなり、被接合部材５の抜け止め効果がもたらされる。また、接合部材４のアンダーカット部４ｃｃの背面により被接合部材５の余肉がかしめられる状態となり、これら部材の密着性が向上して大きな軸線方向の強度が得られる。さらに、接合個所が穴部５ａ内で非貫通状態であるので、気密性の高い接合構造が得られる。 The present invention relates to a metal joining member 4 having a projection 4c which is a non-penetrating joining structure, a joined member 5 having a blind hole 5a into which the projection 4c of the joining member 4 can be inserted, and the joining member 4 The joint member 5 is compressed in a state where the projection 4c of the joint member 5 is inserted into the blind hole 5a of the joint member 5, and the joint member 4 is simultaneously plastically deformed by the joint member 5 An undercut portion 4cc formed by obliquely deforming the back surface on the outer periphery of the upper end, and an extra thickness of the joined member 5 which wraps around the back surface of the undercut portion 4cc due to plastic deformation and joins both members irremovably And are characterized. By this configuration, the undercut portion 4 cc of the joining member 4 forms a groove in which the excess thickness of the joined member 5 wraps around, and the retaining effect of the joined member 5 is brought about. Further, the remaining thickness of the member 5 to be joined is crimped by the back surface of the undercut portion 4 cc of the joining member 4, and the adhesion of these members is improved, and a large axial strength can be obtained. Furthermore, since the junction is in a non-penetrating state in the hole 5a, a highly airtight junction structure can be obtained.
本発明に係るアンダーカット部４ｃｃは、軸方向の強さ、すなわち抜き強度を大きくするために、被接合部材５と接合部材４を密着させる構成であることが望ましい。 It is desirable that the undercut portion 4cc according to the present invention has a configuration in which the bonding member 5 and the bonding member 4 are in close contact with each other in order to increase the axial strength, that is, the extraction strength.
本発明に係る被接合部材５は、被接合部材５の流動性をよくして、被接合部材５と接合部材４との密着性を向上させるために、接合部材４よりも柔らかい材料でなり、被接合部材５の加工硬化を利用して接合部材４の突部４ｃの変形を引き起こす構成であることが望ましい。 The to-be-joined member 5 according to the present invention is made of a material softer than the joining member 4 in order to improve the fluidity of the to-be-joined member 5 and improve the adhesion between the to-be-joined member 5 and the joining member 4 It is desirable that the work hardening of the member 5 to be joined is used to cause the deformation of the projection 4 c of the joint member 4.
本発明に係る突部４ｃは、回転方向の抵抗を大きくして、大きな回転方向の強度を得るために、突端近傍に拡広した段部４ｂを有し、当該段部４ｂの外周が歯形状をなすことが望ましい。 The protrusion 4c according to the present invention has a step 4b which is widened in the vicinity of the tip in order to increase the resistance in the rotation direction and obtain a large strength in the rotation direction, and the outer periphery of the step 4b has a tooth shape It is desirable to
なお、本発明の第１接合方法の各変形例はもちろんのこと、第２接合方法においても、受け型６の水平方向配置、接合部材４よりも柔らかい材質の被接合部材５は適用可能である。また、本発明の各部の具体的な構成は上述した実施形態のみに限定されるものではなく、本発明の趣旨を逸脱しない範囲で種々変形が可能である。 In the second bonding method as well as each modification of the first bonding method of the present invention, the horizontal arrangement of the receiving mold 6 and the joined member 5 of a material softer than the bonding member 4 are applicable. . The specific configuration of each part of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.
３…負極側外部電極端子、
４…接合部材、
４ａ…軸部、
４ｂ…段部、
４ｃ…突部、
４ｃｃ…アンダーカット部
５…被接合部材、
５ａ…穴部、
５ｂ…平板部、
3 ··· Negative electrode side external electrode terminal,
4 ... joining member,
4a ... shaft portion,
4b ... stage,
4c ... projection,
4cc: Undercut part 5: Bonded member,
5a ... hole,
5b ... flat portion,
Claims (4)
前記接合部材の突部を挿入可能な袋穴を有する被接合部材と、
前記接合部材の突部を被接合部材の袋穴に挿入した状態で被接合部材を圧縮し、被接合部材を介して接合部材を塑性変形させることにより、接合部材の突部の上端外周に背面が斜めに変形して形成されるアンダーカット部と、
塑性変形に伴い前記アンダーカット部の背面に回り込み、両部材同士を抜脱不能に接合する被接合部材の余肉と、
を備えることを特徴とする金属部材の非貫通接合構造。 A metal joining member having a protrusion;
A joined member having a blind hole into which the projection of the joining member can be inserted;
The projection of the joint member is inserted into the blind hole of the joint member, and the joint member is compressed, and the joint member is plastically deformed through the joint member, whereby the back surface of the projection upper end of the joint member is back And an undercut portion formed by oblique deformation,
Excess thickness of a member to be joined which wraps around the back surface of the undercut portion with plastic deformation and joins both members in a non-removable manner;
A non-penetrating junction structure of a metal member comprising:
The non-penetrating joint structure of a metal member according to any one of claims 1 to 3, wherein the protrusion has a step portion which is widened in the vicinity of a tip end, and an outer periphery of the step portion has a tooth shape.
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| JP2022112411A (en) * | 2021-01-21 | 2022-08-02 | プライムプラネットエナジー＆ソリューションズ株式会社 | Terminal component, secondary battery, and manufacturing method for the terminal component |
| CN114914638A (en) * | 2021-02-08 | 2022-08-16 | 泰星能源解决方案有限公司 | Terminal member, method for manufacturing terminal member, secondary battery provided with terminal member, and battery pack |
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| JPH0631332U (en) * | 1992-09-30 | 1994-04-22 | 日新電機株式会社 | Mock bus |
| JP2013075297A (en) * | 2011-09-29 | 2013-04-25 | Techno Associe Co Ltd | Coupling structure of metal plate to metal shaft and electrode structure of sealed battery |
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| JPH0631332U (en) * | 1992-09-30 | 1994-04-22 | 日新電機株式会社 | Mock bus |
| JP2013075297A (en) * | 2011-09-29 | 2013-04-25 | Techno Associe Co Ltd | Coupling structure of metal plate to metal shaft and electrode structure of sealed battery |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022112411A (en) * | 2021-01-21 | 2022-08-02 | プライムプラネットエナジー＆ソリューションズ株式会社 | Terminal component, secondary battery, and manufacturing method for the terminal component |
| JP7285865B2 (en) | 2021-01-21 | 2023-06-02 | プライムプラネットエナジー＆ソリューションズ株式会社 | Terminal component, secondary battery, and method for manufacturing terminal component |
| CN114914638A (en) * | 2021-02-08 | 2022-08-16 | 泰星能源解决方案有限公司 | Terminal member, method for manufacturing terminal member, secondary battery provided with terminal member, and battery pack |
| JP2022120925A (en) * | 2021-02-08 | 2022-08-19 | プライムプラネットエナジー＆ソリューションズ株式会社 | Terminal component, secondary battery and battery pack including the same, and method for manufacturing terminal component |
| JP7389766B2 (en) | 2021-02-08 | 2023-11-30 | プライムプラネットエナジー＆ソリューションズ株式会社 | Terminal parts, secondary batteries and assembled batteries equipped with the same, and method for manufacturing terminal parts |
| CN114914638B (en) * | 2021-02-08 | 2024-03-19 | 泰星能源解决方案有限公司 | Terminal member, method for manufacturing terminal member, secondary battery provided with terminal member, and battery pack |
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| Publication number | Publication date |
|---|---|
| JP6613346B2 (en) | 2019-11-27 |
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