JP3670856B2

JP3670856B2 - Electrolytic capacitor tab terminal manufacturing apparatus and manufacturing method thereof

Info

Publication number: JP3670856B2
Application number: JP24518998A
Authority: JP
Inventors: 昌弘中村; 良雄大類
Original assignee: 株式会社アプトデイト
Priority date: 1998-08-31
Filing date: 1998-08-31
Publication date: 2005-07-13
Anticipated expiration: 2018-08-31
Also published as: JP2000077283A

Description

【０００１】
本発明は、電解コンデンサ用タブ端子の製造装置及びその製造方法に関する。
【０００２】
【従来の技術】
従来から電解コンデンサ用タブ端子の製造においては、上型と下型との間でアルミ棒を扁平にプレスし、それら上型と下型から外にはみ出した箇所を、上方から下方へまたは下方から上方へ移動する切断刃によって切断して、扁平な頭部を形成する。この扁平にプレスして切断した頭部において、切断面の終端縁には切断刃の通り抜けた進行方向に向けて突出する鋭利なバリが形成される。この結果、頭部にアルミ箔を巻き付ける際に、頭部の鋭利なバリがアルミ箔を損傷させ、電解コンデンサの製品不良になるという不具合があった。
【０００３】
コンデンサ用タブ端子の頭部のバリを除去する装置が、実公平６−３６５７４号に提供されている。この装置を図１６乃至図２０に示す。下型６０を固定状態とし、その下型６０の上方に上型６２を配置し、上型６２は下型６０に対して上下に自由に変位できるよう設定する。上側に上刃６４ａと下側に下刃６４ｂとを有する切断手段６６を上型６２の両側に備え、その切断手段６６は上型６２に対して自由に変位できるよう設定する。また、両側の切断手段６６は同時に同一方向に移動するよう設定する。
【０００４】
加工の際には、先ず図２１に示すような加工前のタブ端子の丸棒部６８を下型６０の上に載せる。図１６に示すように、下型６０の上に丸棒部６８を載せた後、その丸棒部６８を下型６０と上型６２とで挟持する。この状態では、切断手段６６は上型６２の下端より上位に位置させる。次に、図１７に示すように、両側の切断手段６６を下降させ、切断手段６６の下刃６４ｂを丸棒部６８より下位に位置させると共に、上刃６４ａを丸棒部６８より上位に位置させる。
次に、図１８に示すように、上型６２を下降させて下型６０と上型６２とで丸棒部６８を扁平にプレスし、その後、両側の切断手段６６を下降させる。切断手段６６の上刃６４ａは、下型６０と上型６２との間からはみ出した箇所に食い込み、そのはみ出した箇所の厚さの約半分を切断するが、全部を切断しないようにする。
【０００５】
その後、図１９に示すように、切断手段６６を上昇させ、下刃６４ｂによって下型６０と上型６２との間からはみ出した箇所を全て切断する。この切断した切子７０は、上刃６４と下刃６４ｂとの間の空間に残る。その後、図２０に示すように、上型６２と切断手段６６とを上方に移動させる。即ち、図１６から図２０に至る作業工程によって、図２１に示したタブ端子の丸棒部６８は、図２２の扁平な頭部７２に加工される。この際、上刃６４と下刃６４ｂとの間の空間に残った切子７０は、図示しない送風機あるいは吸引機等によって切断手段６６から除去する。
【０００６】
このように、図１６乃至図２０に示した装置では、プレスによって扁平な頭部７２となる箇所と下型６０と上型６２とからはみ出した箇所との境目を、上方からの上刃６４ａで厚みの一部を切断した後、下方からの下刃６４ｂで全てを切断するものである。この結果、図２２に示す扁平な頭部７２が完成するが、頭部７２の切断面である側面部７４には、従来のような一方向からの切断と比べて、切断面には鋭利なバリが生じることがない剪断面を形成する。よって、頭部７２にアルミ箔を巻き付けてもアルミ箔が損傷するといった従来の不具合を無くすことができるものである。
【０００７】
図１６乃至図２０に示した装置では、切断手段６６は頭部７２の側面部７４（図２２）にバリが出ないように加工するが、頭部７２の先端部７６は切断手段６６によっては加工しない。この場合には、丸棒部６８の軸方向の長さを短くして、下型６０と上型６２とのプレスによる先端側からのはみ出し箇所を少なくして、そのはみ出し箇所はそのままにしておく。あるいは、一方向に切断する切断刃によって、先端側のはみ出し箇所を切断する。
頭部７２の先端部７６において、はみ出し箇所や一方向の切断刃による切断によって鋭利な箇所が発生する。頭部７２にアルミ箔を巻き付ける際に、頭部７２の先端部７６にアルミ箔は接触するが、その接触部に力がかからないので、先端部７６に鋭利な箇所が存在していても、アルミ箔を損傷することが無いと考えられていた。
【０００８】
【発明が解決しようとする課題】
しかし、図２２に示す側面部７４と先端部７６とを連絡する角部７８は一般に直角に近い鋭利な形状となっており、側面部７４（図２２）にバリが出ないように加工されているが、鋭利な角部７８によって、頭部７２に巻き付けるアルミ箔に損傷が生じるという欠点があった。
【０００９】
本発明は上記の点に鑑みてなされたもので、側面部だけでなく側面部と先端部との境目の角部にもバリを生じないようにして、頭部に巻き付けるアルミ箔に損傷が生じないようにした電解コンデンサ用タブ端子の製造装置を提供することを目的とするものである。
【００１０】
【課題を解決するための手段】
この発明に係る電解コンデンサ用タブ端子の製造装置は、タブ端子の丸棒部をプレスして扁平部とはみ出し部とを形成する上型並びに下型と、前記はみ出し部を切断する上刃並びに下刃とを備え、一方の刃で扁平部の側面のはみ出し部の厚さの一部を切断し、その後他方の刃で前記刃の反対側から側面部のはみ出し部の全部の厚さを切断して扁平な頭部を形成する電解コンデンサ用タブ端子の製造装置において、前記頭部の必要な長さの扁平部より先端位置に予備扁平部を形成するための予備下型と予備上型を備え、前記予備下型と前記予備上型とで前記頭部の必要な長さの扁平部より先端位置に予備扁平部を形成し、前記下型と前記上型とで前記扁平部を形成し、前記一方の刃と前記他方の刃とで前記下型と前記上型からはみ出た位置の前記偏平部の側面のはみ出し部と前記予備扁平部とを切断するようにしたものである。
この発明に係る電解コンデンサ用タブ端子の製造方法は、タブ端子の丸棒部を上型と下型とでプレスして扁平部とはみ出し部とを形成し、一方の刃で扁平部の側面のはみ出し部の厚さの一部を切断し、その後他方の刃で前記刃の反対側から側面部のはみ出し部の全部の厚さを切断して扁平な頭部を形成する電解コンデンサ用タブ端子の製造方法において、前記頭部の必要な長さの扁平部より先端位置に予備下型と予備上型とで予備扁平部を形成し、前記下型と前記上型とで前記扁平部を形成し、前記一方の刃と前記他方の刃とで前記下型と前記上型からはみ出た前記偏平部の側面のはみ出し部と前記偏平部の先端より外側の前記予備
【００１１】
【発明の実施の形態】
次に、本発明を図面に基づいて説明する。
図１は本発明に係る電解コンデンサ用タブ端子の製造装置の正面図、図２は図１の要部斜視図である。
下型１０はベース１２に固定し、その下型１０の上位に上型１４を下型１０に対して上下に移動自在に配置する。図１に示すように、上部切断手段１６は上部移動手段１８に固定されると共に下部切断手段２０は下部移動手段２２に固定され、それら上部移動手段１８と下部移動手段に２２との間の間隔は、同一距離Ｈを常に保ちながら上下に自由に移動できるように設定する。
【００１２】
図２に示すように、上部切断手段１６はほぼコの字型の上刃２４を有し、下部移動手段２２はほぼコの字型の下刃２６を有する。図３に示すように、上刃２４や下刃２６におけるコの字状の両方の角部２８は、直角ではなく円弧のような角張らない形状に形成する。
【００１３】
次に、電解コンデンサ用タブ端子の加工手順を示す。先ず、図４に示すように下型１０の上に電解コンデンサ用タブ端子の丸棒部３０を載せ、上型１４を下降させて丸棒部３０を上型１４と下型１０とによってプレスし、丸棒部３０から扁平部３２とはみ出し部３４とを形成する（図５）。この際、上部切断手段１６と下部切断手段２０も下降させるが、上部切断手段１６と下部切断手段２０の下降ストロークは上型１４の下降ストロークよりも短いものとし、上部切断手段１６と下部切断手段２０の両方がはみ出し部３４に接触しないものとする。
【００１４】
次に、図６に示すように、上部切断手段１６を下降させ、上部切断手段１６の上刃２４を下型１０と上型１４との間からはみ出したはみ出し部３４と扁平部３２との境に食い込ませる。この際、そのはみ出し部３４の厚さの約半分を切断するが、全部を切断しないようにする。
図７及び図８に示すように、上刃２４がはみ出し部３４を切断する前に、上部切断手段１６がはみ出し部３４に接触して、はみ出し部３４を図７のように折り曲げ、その後、はみ出し部３４の厚さの約半分を切断する。上部切断手段１６がはみ出し部３４を下方に曲げるので、図８に示すように折り曲がり箇所である扁平部３２の上縁３６は円弧となる。
【００１５】
その後、図９に示すように、上部切断手段１６と下部切断手段２０を上昇させ、下刃２６によってはみ出し部３４の全てを切断する。下刃２６ははみ出し部３４を切断する前に、下部切断手段２０がはみ出し部３４に接触して、はみ出し部３４の下縁を折り曲げる。この結果、扁平部３２の下縁（図示せず）は、図８に示す上縁３６と同様に円弧となる。
図９に示すように、はみ出し部４４を切断した扁平部３２は頭部４０となり、切断されたはみ出し部３４は切子４２となり、図示しない送風機あるいは吸引機等によって除去する。その後、上部切断手段１６と下部切断手段２０を図４の位置まで下降させ、更に上型１４を上方に移動させて、扁平な頭部４０に加工した電解コンデンサ用タブ端子を取り出す。
【００１６】
このように、本発明では、従来の装置と同様に、はみ出し部３５の厚みの一部を上刃２４で切断した後、下刃２６で全てを切断するものである。この結果、切断箇所である側面部４４は鋭利なバリが生じないものとし、頭部４０にアルミ箔を巻き付けてもアルミ箔を損傷することが無い。
本発明では更に、上刃２４や下刃２６におけるコの字状の両方の角部２８（図３）を、直角ではなく例えば円弧形状に形成してある。この結果、図１０に示すように、本発明装置で加工された頭部４０の側面部４４と先端部４６との境界部４８は、上刃２４や下刃２６の角部２８によって角張らない円弧等となる。従って、この境界部４８にアルミ箔が接触してもアルミ箔に損傷が生じることを無くすことができる。
このように、本発明装置で製造する電解コンデンサ用タブ端子では、頭部４０にアルミ箔を巻き付けた場合、アルミ箔が接触する側面部４４と、アルミ箔が接触する可能性のある境界部４８のいずれにもバリや角張った箇所が無いので、アルミ箔に損傷が生じることはない。
【００１７】
本発明では、上刃２４も下刃２６もコの字型に形成されているので、側面部４４や境界部４８と共に先端部４６も切断加工することができ、従来のような先端部４６を切断しなかったり、別工程で先端部４６を切断するものと比べて、効率が良い。
また、上刃２４や下刃２６を、コの字型を途中で切断した形状とし、片方の側面部４４と片方の境界部４８を切断加工するものであっても良い。即ち、上刃２４や下刃２６は、側面部４４とそれに続く境界部４８がバリや角張った箇所が無いようにするものであれば良い。
【００１８】
本発明においては、図１１に示すように、丸棒部３０の軸方向の長さが長い場合には、丸棒部３０を下型１０と上型１４とでプレスして扁平部３２を形成した際に、丸棒部３０の先の先端突出部５０（プレスされない丸棒部３０の先端部）は下型１０と上型１４とでプレスされない状態で残る。
このため、図７や図８に示すように、上部切断部材１６が両側のはみ出し部材３４を曲げるために下降すると、上部切断部材１６が両側のはみ出し部材３４に接触する前に、上部切断部材１６が先端突出部５０に接触し、先端突出部５０が先に折れてしまう（図１２）。この結果、先端部４６及び境界部４８にバリが生じるおそれがある。
【００１９】
これを解消するため、頭部４０としての必要な軸方向の長さ以上に扁平部３２を形成する。即ち、図１３に示すように、先ず予備下型５２と予備上型５４とで、頭部４０としての必要な軸方向の長さを越えた箇所に予備扁平部５６を形成する。その後、予備扁平部５６に続く丸棒部３０に、図１４に示すように、下型１０と上型１４とでプレスして扁平部３２を形成する。図１４における扁平部３２は、図１３における予備扁平部５６を一部含んでいる。
その後、図１５に示すように上部切断部１６が先端突出部５０に接触すると同時に、図７に示すように上部切断部１６がはみ出し部材３４に接触する。このようにすることによって、先端突出部５０が先に折れることが無くなり、先端部４６に近い位置の先端部４６及び境界部４８にバリが生じるおそれを解消することができる。
その後、上刃２４と下刃２６とによって、下型１０と上型１４とからはみ出した予備扁平部５６が切断される。
【００２０】
【発明の効果】
以上説明のように、本発明に係る電解コンデンサ用タブ端子の製造装置及びその製造方法によれば、頭部の側面部を切断する上刃や下刃が、頭部の側面部と先端部との境界部を切断するものとし、しかもその境界部を角張らない円弧等に切断することで、従来の境界部に発生したアルミ箔の損傷の発生を無くすことができる。
また、上刃や下刃をコの字状することにより、側面部の切断の際に先端部も同時に切断することができる。
更に、頭部の必要な長さの扁平部を形成する前にその扁平部より先端位置に予備扁平部を形成し、その後下型と上型とで予備扁平部に隣接する位置に扁平部を形成することで、先端部及び境界部にバリが発生するおそれを無くすことができる。
【図面の簡単な説明】
【図１】本発明に係る電解コンデンサ用タブ端子の製造装置の正面図である。
【図２】図１の要部分解斜視図である。
【図３】本発明の上刃並びに下刃の要部平面図である。
【図４】本発明のタブ端子製造装置の作動状態を示す説明図である。
【図５】本発明のタブ端子製造装置の作動状態を示す説明図である。
【図６】本発明のタブ端子製造装置の作動状態を示す説明図である。
【図７】上部切断手段がはみ出し部に接触してはみ出し部を曲げる状態を示す説明図である。
【図８】図６の要部拡大図である。
【図９】本発明のタブ端子製造装置の作動状態を示す説明図である。
【図１０】本発明のタブ端子製造装置で製造した電解コンデンサ用タブ端子の平面図である。
【図１１】上型と下型とで丸棒部をプレスして扁平部を形成した状態を示す説明図である。
【図１２】図１１の扁平部に続く先端突出部が折れる状態を示す説明図である。
【図１３】予備上型と予備下型とで丸棒部に予備の扁平部を形成した状態を示す説明図である。
【図１４】図１３の予備の扁平部に隣接した新たな扁平部を形成した状態を示す説明図である。
【図１５】図１４における扁平部に続く先端突出部を上部切断部材で下方に押している状態を示す説明図である。
【図１６】従来のタブ端子製造装置の作動状態を示す説明図である。
【図１７】従来のタブ端子製造装置の作動状態を示す説明図である。
【図１８】従来のタブ端子製造装置の作動状態を示す説明図である。
【図１９】従来のタブ端子製造装置の作動状態を示す説明図である。
【図２０】従来のタブ端子製造装置の作動状態を示す説明図である。
【図２１】プレス前のタブ端子の平面図である。
【図２２】従来のタブ端子製造装置で製造された電解コンデンサ用タブ端子の平面図である。
【符号の説明】
１０下型
１４上型
２４上刃
２６下刃
２８角部
３０丸棒部
３２扁平部
３４はみ出し部
４０頭部
４４側面部
４６先端部
４８境界部
５２予備下型
５４予備上型
５６予備扁平部[0001]
The present invention relates to an apparatus for manufacturing an electrolytic capacitor tab terminal and a method for manufacturing the same .
[0002]
[Prior art]
Conventionally, in the manufacture of electrolytic capacitor tab terminals, the aluminum bar is pressed flat between the upper mold and the lower mold, and the locations protruding from the upper mold and the lower mold are changed from above to below or from below. A flat head is formed by cutting with a cutting blade that moves upward. In the head portion that is pressed and cut flat, a sharp burr that protrudes in the advancing direction that passes through the cutting blade is formed at the end edge of the cut surface. As a result, when the aluminum foil is wound around the head, the sharp burr on the head damages the aluminum foil, resulting in a defective product of the electrolytic capacitor.
[0003]
Japanese Utility Model Publication No. 6-36574 provides a device for removing a burr on the head of a capacitor tab terminal. This apparatus is shown in FIGS. The lower mold 60 is fixed, an upper mold 62 is disposed above the lower mold 60, and the upper mold 62 is set so that it can be freely displaced up and down with respect to the lower mold 60. Cutting means 66 having an upper blade 64 a on the upper side and a lower blade 64 b on the lower side is provided on both sides of the upper mold 62, and the cutting means 66 is set so that it can be freely displaced with respect to the upper mold 62. Further, the cutting means 66 on both sides are set so as to move simultaneously in the same direction.
[0004]
When processing, first, the round terminal portion 68 of the tab terminal before processing as shown in FIG. As shown in FIG. 16, after the round bar portion 68 is placed on the lower mold 60, the round bar portion 68 is sandwiched between the lower mold 60 and the upper mold 62. In this state, the cutting means 66 is positioned higher than the lower end of the upper mold 62. Next, as shown in FIG. 17, the cutting means 66 on both sides are lowered, the lower blade 64b of the cutting means 66 is positioned below the round bar portion 68, and the upper blade 64a is positioned higher than the round bar portion 68. Let
Next, as shown in FIG. 18, the upper die 62 is lowered to press the round bar portion 68 flatly with the lower die 60 and the upper die 62, and then the cutting means 66 on both sides are lowered. The upper blade 64a of the cutting means 66 bites into a portion protruding from between the lower mold 60 and the upper die 62, and cuts about half of the thickness of the protruding portion, but does not cut the entire portion.
[0005]
Thereafter, as shown in FIG. 19, the cutting means 66 is raised, and all portions protruding from between the lower mold 60 and the upper mold 62 are cut by the lower blade 64 b. This cut face 70 remains in the space between the upper blade 64 and the lower blade 64b. Thereafter, as shown in FIG. 20, the upper mold 62 and the cutting means 66 are moved upward. That is, the tab terminal round bar portion 68 shown in FIG. 21 is processed into the flat head portion 72 shown in FIG. At this time, the facet 70 remaining in the space between the upper blade 64 and the lower blade 64b is removed from the cutting means 66 by a blower or a suction device (not shown).
[0006]
As described above, in the apparatus shown in FIGS. 16 to 20, the boundary between the portion that becomes the flat head 72 by the press and the portion that protrudes from the lower die 60 and the upper die 62 is formed by the upper blade 64a from above. After a part of the thickness is cut, the whole is cut with the lower blade 64b from below. As a result, the flat head 72 shown in FIG. 22 is completed, but the side surface 74, which is the cut surface of the head 72, has a sharper cut surface than a conventional cut from one direction. Forms a shear surface that does not cause burrs. Therefore, even if the aluminum foil is wound around the head 72, the conventional problem that the aluminum foil is damaged can be eliminated.
[0007]
In the apparatus shown in FIG. 16 to FIG. 20, the cutting means 66 is processed so that no burrs appear on the side surface portion 74 (FIG. 22) of the head 72, but the distal end portion 76 of the head 72 depends on the cutting means 66. Do not process. In this case, the length in the axial direction of the round bar portion 68 is shortened to reduce the protruding portion from the tip side by the press of the lower die 60 and the upper die 62, and the protruding portion is left as it is. . Alternatively, the protruding portion on the tip side is cut by a cutting blade that cuts in one direction.
In the tip portion 76 of the head 72, a sharp portion is generated by a protruding portion or cutting by a cutting blade in one direction. When the aluminum foil is wound around the head 72, the aluminum foil contacts the tip portion 76 of the head 72, but since no force is applied to the contact portion, the aluminum is not affected even if a sharp spot is present on the tip portion 76. It was thought that the foil would not be damaged.
[0008]
[Problems to be solved by the invention]
However, the corner portion 78 connecting the side surface portion 74 and the front end portion 76 shown in FIG. 22 has a sharp shape generally close to a right angle, and is processed so that no burr appears on the side surface portion 74 (FIG. 22). However, the sharp corner portion 78 has a drawback that the aluminum foil wound around the head portion 72 is damaged.
[0009]
The present invention has been made in view of the above points, and the aluminum foil wound around the head is damaged by preventing burrs not only at the side surface but also at the corner of the boundary between the side surface and the tip. It is an object of the present invention to provide an apparatus for manufacturing a tab terminal for an electrolytic capacitor which is not provided.
[0010]
[Means for Solving the Problems]
An apparatus for manufacturing a tab terminal for an electrolytic capacitor according to the present invention includes an upper die and a lower die that press a round bar portion of a tab terminal to form a flat portion and a protruding portion, and an upper blade and a lower die that cut the protruding portion. A blade, and one blade cuts a part of the thickness of the protruding portion of the side surface of the flat portion, and then the other blade cuts the entire thickness of the protruding portion of the side surface portion from the opposite side of the blade. In an apparatus for manufacturing a tab terminal for an electrolytic capacitor that forms a flat head, a preliminary lower mold and a preliminary upper mold are provided to form a preliminary flat part at the tip position from the flat part of the required length of the head. The preliminary lower mold and the preliminary upper mold form a preliminary flat part at the tip position from the flat part of the necessary length of the head, and the lower mold and the upper mold form the flat part , Previous positions protruding from the upper mold and the lower mold between the one blade and the other blade In which a protruding portion of the side surface of the flat portion was set to be cut and the preliminary flat portion.
In the method of manufacturing a tab terminal for an electrolytic capacitor according to the present invention, the round bar portion of the tab terminal is pressed with an upper die and a lower die to form a flat portion and a protruding portion, and one blade has a side surface of the flat portion. The electrolytic capacitor tab terminal for cutting a part of the thickness of the protruding portion and then cutting the entire thickness of the protruding portion of the side surface portion from the opposite side of the blade with the other blade to form a flat head. In the manufacturing method, a preliminary flat part is formed by a preliminary lower mold and a preliminary upper mold at a tip position from a flat part having a necessary length of the head, and the flat part is formed by the lower mold and the upper mold. The one blade and the other blade protrude from the lower mold and the upper mold from the side surface of the flat portion and the reserve outside the tip of the flat portion.
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be described with reference to the drawings.
FIG. 1 is a front view of an electrolytic capacitor tab terminal manufacturing apparatus according to the present invention, and FIG. 2 is a perspective view of an essential part of FIG.
The lower mold 10 is fixed to the base 12, and the upper mold 14 is disposed above the lower mold 10 so as to be movable up and down with respect to the lower mold 10. As shown in FIG. 1, the upper cutting means 16 is fixed to the upper moving means 18 and the lower cutting means 20 is fixed to the lower moving means 22, and the distance between the upper moving means 18 and the lower moving means 22. Is set so that it can freely move up and down while always maintaining the same distance H.
[0012]
As shown in FIG. 2, the upper cutting means 16 has an approximately U-shaped upper blade 24, and the lower moving means 22 has an approximately U-shaped lower blade 26. As shown in FIG. 3, both of the U-shaped corner portions 28 of the upper blade 24 and the lower blade 26 are formed in a non-angular shape such as an arc instead of a right angle.
[0013]
Next, the processing procedure of the tab terminal for electrolytic capacitors is shown. First, as shown in FIG. 4, the round bar portion 30 of the electrolytic capacitor tab terminal is placed on the lower die 10, the upper die 14 is lowered, and the round rod portion 30 is pressed by the upper die 14 and the lower die 10. The flat portion 32 and the protruding portion 34 are formed from the round bar portion 30 (FIG. 5). At this time, the upper cutting means 16 and the lower cutting means 20 are also lowered, but the lowering strokes of the upper cutting means 16 and the lower cutting means 20 are shorter than the lowering strokes of the upper die 14. It is assumed that both 20 do not contact the protruding portion 34.
[0014]
Next, as shown in FIG. 6, the upper cutting means 16 is lowered, and the upper blade 24 of the upper cutting means 16 protrudes from between the lower mold 10 and the upper mold 14 and the boundary between the protruding portion 34 and the flat portion 32. To bite into. At this time, about half of the thickness of the protruding portion 34 is cut, but not all.
As shown in FIGS. 7 and 8, before the upper blade 24 cuts the protruding portion 34, the upper cutting means 16 comes into contact with the protruding portion 34, and the protruding portion 34 is folded as shown in FIG. Cut about half of the thickness of section 34. Since the upper cutting means 16 bends the protruding portion 34 downward, as shown in FIG. 8, the upper edge 36 of the flat portion 32 which is a bent portion is an arc.
[0015]
After that, as shown in FIG. 9, the upper cutting means 16 and the lower cutting means 20 are raised, and the entire protruding portion 34 is cut by the lower blade 26. Before the lower blade 26 cuts the protruding portion 34, the lower cutting means 20 contacts the protruding portion 34 and bends the lower edge of the protruding portion 34. As a result, the lower edge (not shown) of the flat portion 32 becomes an arc like the upper edge 36 shown in FIG.
As shown in FIG. 9, the flat portion 32 obtained by cutting the protruding portion 44 becomes a head 40, and the cut protruding portion 34 becomes a facet 42, which is removed by a blower or a suction device (not shown). Thereafter, the upper cutting means 16 and the lower cutting means 20 are lowered to the position of FIG. 4, and the upper die 14 is further moved upward to take out the electrolytic capacitor tab terminal processed into the flat head 40.
[0016]
As described above, in the present invention, like the conventional apparatus, a part of the thickness of the protruding portion 35 is cut with the upper blade 24 and then cut with the lower blade 26. As a result, the side portion 44 that is a cut portion is assumed to have no sharp burrs, and even if the aluminum foil is wound around the head 40, the aluminum foil is not damaged.
In the present invention, both U-shaped corners 28 (FIG. 3) of the upper blade 24 and the lower blade 26 are formed not in a right angle but in an arc shape, for example. As a result, as shown in FIG. 10, the boundary portion 48 between the side surface portion 44 and the tip portion 46 of the head 40 processed by the apparatus of the present invention is not angular by the corner portion 28 of the upper blade 24 or the lower blade 26. It becomes an arc. Therefore, even if the aluminum foil comes into contact with the boundary portion 48, the aluminum foil can be prevented from being damaged.
As described above, in the electrolytic capacitor tab terminal manufactured by the apparatus of the present invention, when aluminum foil is wound around the head 40, the side surface portion 44 with which the aluminum foil contacts and the boundary portion 48 with which the aluminum foil may come into contact. Since none of these has burrs or squares, the aluminum foil is not damaged.
[0017]
In the present invention, since both the upper blade 24 and the lower blade 26 are formed in a U-shape, the tip portion 46 can be cut together with the side surface portion 44 and the boundary portion 48. It is more efficient than cutting without cutting or cutting the tip 46 in a separate process.
Alternatively, the upper blade 24 and the lower blade 26 may be formed by cutting a U-shape in the middle and cutting one side surface portion 44 and one boundary portion 48. In other words, the upper blade 24 and the lower blade 26 may be any one that prevents the side surface portion 44 and the subsequent boundary portion 48 from having burrs or angular portions.
[0018]
In the present invention, as shown in FIG. 11, when the length of the round bar portion 30 in the axial direction is long, the round bar portion 30 is pressed by the lower die 10 and the upper die 14 to form the flat portion 32. When this is done, the tip protrusion 50 (the tip of the non-pressed round bar 30) of the round bar part 30 remains unpressed by the lower mold 10 and the upper mold 14.
For this reason, as shown in FIGS. 7 and 8, when the upper cutting member 16 is lowered to bend the protruding members 34 on both sides, the upper cutting member 16 is brought into contact with the protruding members 34 on both sides before the upper cutting member 16 contacts the protruding members 34 on both sides. Contacts the tip protrusion 50, and the tip protrusion 50 breaks first (FIG. 12). As a result, burrs may occur at the tip 46 and the boundary 48.
[0019]
In order to eliminate this, the flat part 32 is formed more than the length of the axial direction required as the head 40. That is, as shown in FIG. 13, first, the preliminary flat part 56 is formed at a location exceeding the necessary axial length as the head 40 by the preliminary lower mold 52 and the preliminary upper mold 54. Thereafter, as shown in FIG. 14, the flat part 32 is formed by pressing the round bar part 30 following the preliminary flat part 56 with the lower mold 10 and the upper mold 14. The flat part 32 in FIG. 14 partially includes the preliminary flat part 56 in FIG.
Thereafter, as shown in FIG. 15, the upper cutting portion 16 comes into contact with the tip protrusion 50, and at the same time, the upper cutting portion 16 comes into contact with the protruding member 34 as shown in FIG. 7. By doing in this way, the front-end | tip protrusion part 50 does not break first, and the possibility that a burr | flash may arise in the front-end | tip part 46 and the boundary part 48 of the position close | similar to the front-end | tip part 46 can be eliminated.
Thereafter, the preliminary flat portion 56 protruding from the lower mold 10 and the upper mold 14 is cut by the upper blade 24 and the lower blade 26.
[0020]
【The invention's effect】
As described above, according to the electrolytic capacitor tab terminal manufacturing apparatus and the manufacturing method thereof according to the present invention, the upper blade and the lower blade for cutting the side surface portion of the head include the side surface portion and the tip portion of the head portion. By cutting the boundary part into a non-angular arc or the like, it is possible to eliminate the occurrence of damage to the aluminum foil that occurs in the conventional boundary part.
Further, by making the upper blade and the lower blade U-shaped, the tip portion can be cut at the same time when the side portion is cut.
Furthermore, before forming the flat part of the required length of the head, a preliminary flat part is formed at the tip position from the flat part, and then the flat part is positioned at a position adjacent to the preliminary flat part in the lower mold and the upper mold. By forming it, it is possible to eliminate the possibility of burrs occurring at the tip and the boundary.
[Brief description of the drawings]
FIG. 1 is a front view of an electrolytic capacitor tab terminal manufacturing apparatus according to the present invention.
FIG. 2 is an exploded perspective view of the main part of FIG.
FIG. 3 is a plan view of an essential part of an upper blade and a lower blade of the present invention.
FIG. 4 is an explanatory view showing an operating state of the tab terminal manufacturing apparatus of the present invention.
FIG. 5 is an explanatory view showing an operating state of the tab terminal manufacturing apparatus of the present invention.
FIG. 6 is an explanatory view showing an operating state of the tab terminal manufacturing apparatus of the present invention.
FIG. 7 is an explanatory view showing a state in which the upper cutting means comes into contact with the protruding portion and bends the protruding portion.
FIG. 8 is an enlarged view of a main part of FIG. 6;
FIG. 9 is an explanatory view showing an operating state of the tab terminal manufacturing apparatus of the present invention.
FIG. 10 is a plan view of a tab terminal for an electrolytic capacitor manufactured by the tab terminal manufacturing apparatus of the present invention.
FIG. 11 is an explanatory view showing a state where a round bar portion is pressed by an upper die and a lower die to form a flat portion.
12 is an explanatory view showing a state in which a tip protrusion following the flat part of FIG. 11 is broken.
FIG. 13 is an explanatory view showing a state in which a spare flat part is formed on a round bar part by a spare upper mold and a spare lower mold.
14 is an explanatory diagram showing a state in which a new flat portion adjacent to the spare flat portion in FIG. 13 is formed.
15 is an explanatory view showing a state in which a leading end protruding portion following the flat portion in FIG. 14 is pushed downward by an upper cutting member. FIG.
FIG. 16 is an explanatory view showing an operating state of a conventional tab terminal manufacturing apparatus.
FIG. 17 is an explanatory view showing an operating state of a conventional tab terminal manufacturing apparatus.
FIG. 18 is an explanatory view showing an operating state of a conventional tab terminal manufacturing apparatus.
FIG. 19 is an explanatory view showing an operating state of a conventional tab terminal manufacturing apparatus.
FIG. 20 is an explanatory view showing an operating state of a conventional tab terminal manufacturing apparatus.
FIG. 21 is a plan view of a tab terminal before pressing.
FIG. 22 is a plan view of a tab terminal for an electrolytic capacitor manufactured by a conventional tab terminal manufacturing apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Lower mold | type 14 Upper mold | type 24 Upper blade 26 Lower blade 28 Corner | angular part 30 Round bar | burr part 32 Flat part 34 Overhang | projection part 40 Head part 44 Side surface part 46 Front-end | tip part 48 Boundary part 52

Claims

An upper die and a lower die that press the round bar portion of the tab terminal to form a flat portion and a protruding portion, and an upper blade and a lower blade that cut the protruding portion, and one blade of the side surface of the flat portion is provided. The electrolytic capacitor tab terminal for cutting a part of the thickness of the protruding portion and then cutting the entire thickness of the protruding portion of the side surface portion from the opposite side of the blade with the other blade to form a flat head. The manufacturing apparatus includes a preliminary lower mold and a preliminary upper mold for forming a preliminary flat part at a tip position from a flat part having a required length of the head, and the head includes the preliminary lower mold and the preliminary upper mold. A preliminary flat part is formed at the tip position from the flat part of the required length of the part, the flat part is formed by the lower mold and the upper mold, and the lower mold is formed by the one blade and the other blade be cut and the preliminary flat portion and the protruding portion of the side surface of the flat portion of the position protruding from the upper mold and Apparatus for manufacturing a tab terminal for an electrolytic capacitor characterized in that.

The one blade and the other blade are substantially U-shaped without sharp points at the boundary between the blade portions that cut off the protruding portion of the side surface of the flat portion and the preliminary flat portion. The apparatus for manufacturing a tab terminal for an electrolytic capacitor according to claim 1.

The round part of the tab terminal is pressed with the upper mold and the lower mold to form the flat part and the protruding part, and one blade cuts part of the thickness of the protruding part on the side of the flat part, and then the other In the method for manufacturing a tab terminal for an electrolytic capacitor in which the entire thickness of the protruding portion of the side surface portion is cut from the opposite side of the blade with the blade of the electrolytic capacitor to form a flat head portion, A preliminary flat part is formed by a preliminary lower mold and a preliminary upper mold at a tip position from the part, the flat part is formed by the lower mold and the upper mold, and the lower blade is formed by the one blade and the other blade. A method of manufacturing a tab terminal for an electrolytic capacitor , comprising: cutting a protruding portion on a side surface of the flat portion at a position protruding from the mold and the upper mold and the preliminary flat portion .