JP3705471B2

JP3705471B2 - Disc-shaped roll for punching metal plate, metal plate punching device using the roll, metal plate punching method, and punched metal plate

Info

Publication number: JP3705471B2
Application number: JP30751798A
Authority: JP
Inventors: 慶一志水
Original assignee: Toyo Kohan Co Ltd
Current assignee: Toyo Kohan Co Ltd
Priority date: 1998-06-18
Filing date: 1998-10-28
Publication date: 2005-10-12
Anticipated expiration: 2018-10-28
Also published as: JP2000153322A

Description

【０００１】
【発明の属する技術分野】
本発明は、長尺帯状の金属板又は金属箔に連続的に孔を穿設する金属板穿孔用円板状ロール、同ロールを用いた金属板穿孔装置、金属板穿孔方法、さらにそれらの金属板穿孔装置及び金属板穿孔方法を用いて製作される穿孔金属板に関する。
【０００２】
【従来の技術】
近年、二次電池電極の電極基体に用いるべく、多数の孔を穿設した穿孔金属板の需要が高まっている。この二次電池電極基体用の穿孔金属板は、その表面に活物質を付着させて卷き取り、電池容器内に充填される。この際、孔は、活物質の金属板への接着を付勢するアンカー効果を付与するとともに、この孔部にも活物質を充填することを目的として、金属板に形成される。電池容量を増加させるためにはできるだけ多くの活物質を電池容器内に充填する必要があり、そのために電極基体用の穿孔金属板としてはできる限り薄いものが求められている。
従来、穿孔金属板を製造する方法としては打ち抜きプレスを用いて穿孔する方法が一般的であったが、プレス装置を用いる穿孔方法は、穿孔加工される金属板が断続的に供給されることになり、プレス加工時には金属板を停止せざるを得ず、また、プレス装置に巨大な力を作用させることと相まって、穿孔速度を上昇させて、穿孔金属板の生産性を向上させることが極めて困難であった。
【０００３】
穿孔速度を上昇させて穿孔金属板の生産性を向上させる方法として、多数の突起を有する孔明けローラを回転させて、連続的に孔明き金属板を製造する方法が特開昭第６０−１３３９３６号公報に開示されている。この孔明き金属板の製造は以下のように行われる。即ち、まず外周面に多数の鋸歯状の突起を設けたローラと受けローラとの間に金属板を連続的に通すことにより、突起によって孔が明けられると同時に返りが切り起される。孔を明けられた金属板は連続的に進行し、前方に設けられた引っかき治具の先端に返りが当たり、返りが折り返さる。さらに金属板は連続的に進行し、前方に設けられた圧延ローラに送られて圧延され、返りが金属板に食い込み、ばりのない孔明き金属板が形成される。そして、上記の孔明き金属板の製造方法を用いた場合、連続的に穿孔することが可能となり、穿孔速度が上昇して穿孔金属板の生産性は向上する。
【０００４】
【発明が解決しようとする課題】
しかし、上記した突起を有する孔明けローラを回転させて連続的に孔明き金属板を製造する方法は、未だ、以下の解決すべき課題を有していた。
即ち、返りが折り返された部分は元の金属板の２倍近くの厚さとなり、二次電池電極基体用の穿孔金属板として用いた場合、活物質を表面に付着させ卷き取って電池容器内に充填する際に金属板自体の容積が増加するため、それだけ活物質の充填量が減少することになり、電池容量を増加させるためには好ましくない。また、圧延を強化して折り返し部を他の部分と同一の厚さにする場合は、折り返し部の厚さが他の部分の２倍近いために、この部分のみが極端に圧延されて延びることになる。従って、穿孔された孔同士の間隔が広がり穿孔密度が減少し、二次電池電極基体用の穿孔金属板として用いた場合、アンカー効果が不十分となると共に、孔部に充填される活物質の量も減少することになり、好ましくない。
本発明は、このような課題を解決するためなされたものであり、長尺帯状の金属帯板、特に二次電池電極基体に用いる極薄の金属箔に均一な厚さを有しながら連続的に一様な孔を多数穿設することができる金属板穿孔用円板状ロール、及びそれを用いた金属板穿孔装置、金属板穿孔方法、さらにそれらの金属板穿孔装置及び金属板穿孔方法を用いて作成してなる穿孔金属板を提供することを目的とする。
【０００５】
【課題を解決するための手段】
本発明に係る請求項１記載の金属板穿孔用円板状ロールは、一定の厚みを有する円板状ロールの外周面上に、周方向に間隔を開けて複数の穿孔用刃部を半径外方向に突出した状態で形成してなる金属板穿孔用円板状ロールにおいて、前記穿孔用刃部の外周面上の平面刃部形状を１本の閉塞線で囲まれる幾何学形状となし、前記穿孔用刃部を側面から見た側面刃部形状を、その両周方向端部における刃高が他の部分の刃高より高くなると共に前記刃高が前記両周方向端部より中央部に向けて漸次低くなる凹面状に形成し、かつ、前記穿孔用刃部の側面刃部形状において、前記円板状ロールの回転方向に先行する一方の前記周方向端部の刃高を、前記回転方向に後行する他方の前記周方向端部の刃高より低くしたことを特徴とする。
【０００６】
また、上記した金属板穿孔用円板状ロールは、請求項２〜請求項３に記載したとおり、
（１）前記穿孔用刃部の平面刃部形状を、矩形形状又は４つの角部に丸みを持たせた略矩形形状としたこと、
（２）前記穿孔用刃部の平面刃部形状を、長円形状、楕円形状、正円形状、菱形形状、または４つの角部に丸みを持たせた略菱形形状のいずれかとしたことにも特徴を有する。
【０００７】
請求項４記載の金属板穿孔装置は、金属板又は金属箔に複数の孔を穿孔する金属板穿孔装置であって、請求項１に記載の前記金属板穿孔用円板状ロールを上側ロールとし、該上側ロールの両側に、半径を前記金属板穿孔用円板状ロールの中心から前記穿孔用刃部の最低部までの長さより少なくとも前記金属板又は金属箔の厚さ分以上小さくした一対の上側サイドガイドロールを同軸的に連結して上部ロールを形成し、前記金属板穿孔用円板状ロールの円板の厚さよりわずかに大きい厚みを有する円板状ロールによってガイドロールとし、該ガイドロールの両側に、半径を前記円板状ロールの半径よりも、少なくとも前記金属板又は金属箔の厚さ分に前記穿孔用刃部の最大刃高部の突出量と最小刃高部の突出量の差を加えた長さよりも大きくした一対の下側サイドガイドロールを同軸的に連結して下部ロールを形成し、前記上部ロールと前記下部ロールを嵌合させ、前記金属板又は金属箔を通過させながら穿孔することができる穿孔部を形成し、前記穿孔部の前後方に、前記金属板又は金属箔に張力を付与する張力付与手段からなる張力付与部をそれぞれ配設したことを特徴とする。
また、上記した金属板穿孔装置は、請求項５記載の通り、請求項４記載の前記穿孔部を構成する前記上部ロール及び前記下部ロールを、それぞれ、複数組、同軸的に連結し、前記金属板又は金属箔に複数条で穿孔を可能としたことを特徴とする。
【０００８】
請求項６の金属板穿孔装置は、請求項４または５において、前記金属板又は金属箔が前記ガイドロールに巻き付きながら穿孔されるように、前記金属板又は金属箔が前記ガイドロールの外周の一部に沿って進行するような位置関係で、前記上部ロールおよび前記下部ロールと、前記張力付与手段とを設けてなることを特徴とする。
請求項７の金属板穿孔装置は、請求項４または６において、前記張力付与手段が前記金属板又は金属箔を挟み付ける上下１対のピンチロールからなることを特徴とする。
請求項８の金属板穿孔装置は、請求項４または６において、前記張力付与手段が上下１対のブライドルロールからなることを特徴とする。
【０００９】
請求項９の金属板穿孔方法は、請求項４〜８のいずれかに記載の前記金属板穿孔装置を用いて前記金属板又は金属箔を穿孔する金属板穿孔方法であって、前記穿孔部の前後方にそれぞれ配設した一対の張力付与部を通して前記金属板又は金属箔を通板し、前記張力付与部をそれぞれ構成する張力付与手段によって前記金属板又は金属箔に張力を付与しながら、前記穿孔部を構成する上下ロールを回転させて、前記金属板又は金属箔を連続的に穿孔することを特徴とする。
請求項１０の穿孔金属板は、一定の厚みを有する円板状ロールの外周面上に、周方向に間隔を開けて複数の穿孔用刃部を半径外方向に突出した状態で形成し、前記穿孔用刃部の外周面上の平面刃部形状を１本の閉塞線で囲まれる幾何学形状となし、前記穿孔用刃部を側面から見た側面刃部形状を、その両周方向端部における刃高が他の部分の刃高より高くなると共に前記刃高が前記両周方向端部より中央部に向けて漸次低くなる凹面状に形成し、かつ、前記穿孔用刃部の側面刃部形状において、前記円板状ロールの回転方向に先行する一方の前記周方向端部の刃高を、前記回転方向に後行する他方の前記周方向端部の刃高より低くした金属板穿孔用円板状ロールを上側ロールとし、
該上側ロールの両側に、半径を該上側ロールの中心から前記穿孔用刃部の最低部までの長さより少なくとも前記金属板又は金属箔の厚さ分以上小さくした一対の上側サイドガイドロールを同軸的に連結して上部ロールを形成し、
前記上側ロールの円板の厚さよりわずかに大きい厚みを有する円板状ロールをガイドロールとし、該ガイドロールの両側に、半径を前記円板状ロールの半径よりも、少なくとも前記金属板ないし金属箔の厚さ分に前記穿孔用刃部の最大刃高部の突出量と最小刃高部の突出量の差を加えた長さよりも大きくした一対の下側サイドガイドロールを同軸的に連結して下部ロールを形成し、
前記上部ロールと前記下部ロールを嵌合させ、前記金属板又は金属箔を通過させながら穿孔可能な穿孔部を形成し、前記穿孔部の前後方に、前記金属板又は金属箔に張力を付与する張力付与手段からなる張力付与部をそれぞれ配設し、
前記穿孔部の前後方にそれぞれ配設した一対の張力付与部を通して前記金属板又は金属箔を通板し、前記張力付与部をそれぞれ構成する張力付与手段によって前記金属板又は金属箔に張力を付与しながら、前記穿孔部を構成する上下ロールを回転させて、前記金属板又は金属箔を連続的に穿孔してなることを特徴とする。
【００１０】
【発明の実施の形態】
以下、図面を参照しながら、本発明を詳細に説明する。
本発明の金属板穿孔用円板状ロールは、０. ０２〜０. ２ｍｍ程度の金属板又は金属箔に連続的に多数の孔を穿孔することを目的とする。
図１に示すように、円板状ロール１の外周面上に周方向に間隔を開けて半径外方向に突出した状態で、複数の穿孔用刃部２が形成されている。
穿孔用刃部２の外周面上の平面刃部形状、即ち、穿孔断面は１本の閉塞線で囲まれる幾何学形状をなしている。本実施の形態では矩形形状としている。
図１及び図２に示すように、穿孔用刃部２の側面から見た側面刃部形状は、その両周方向端部をなす前、後縁２１、２２における刃高が他の部分の刃高より高くなると共に、刃高が前、後縁２１、２２より中央部に向けて漸次低くなる凹面状に形成している。
【００１１】
即ち、図２に示すように、穿孔用刃部２は、円板状ロール１の周方向に沿って互いに対向する両側の閉塞線の部分に相当する穿孔用刃部２の両方の側縁２３の刃先が、円板状ロール１の厚さ方向に沿って互いに対向する両側の閉塞線の部分に相当する前、後縁２１、２２の刃先同士を結ぶ仮想直線２４よりも低く突出するように形成されている。
穿孔用刃部２の平面刃部形状、即ち、穿孔断面は、図２に示すように前縁２１、後縁２２、及び側縁２３からなる正確な矩形形状の他、矩形の４つの角部を丸めた略矩形形状とすることもできる。
【００１２】
また、穿孔用刃部２の円板状ロール１の外周面上において両周方向端部を形成する前縁２１及び２２は、図３に示すように、円板状ロール１の回転に伴ってはじめに金属板又は金属箔（以下、金属板と金属箔を総称して金属板という）１０に食い込む先行する周方向端部である前縁２１の刃高を、その後に金属板１０に食い込む後行の周方向端部である後縁２２の刃高より低くすることができる。穿孔用刃部２の側面形状をこのように形成することによって、図３に示すように、前縁２１と後縁２２を金属板１０に同時に食い込ませることができる。
さらに、穿孔用刃部２の平面刃部形状は、上記した矩形形状や略矩形形状に代えて、金属板の性質に合わせて、他の形状、例えば長円形状、楕円形状、正円形状、菱形形状、または４つの角部を丸めた略菱形形状など、所望の幾何学的図形とすることができる。
【００１３】
次に、本発明に係る金属板穿孔装置の構成を、図６を参照して説明する。
図示するように、金属板穿孔装置は、穿孔部２０と、穿孔部２０の前方および後方に配設された張力付与手段としての上下１対のピンチロール６ａ、６ｂ、および１７ａ、１７ｂからなる張力付与部３０とから構成されている。一方、穿孔部２０は上、下ロール１１、１２の外周面に周方向に間隔をあけて穿孔用刃部２を形成することによって構成されている。
なお、張力付与手段として、図９に示すように、上下１対のブライドルロール１６ａ、１６ｂ、および１７ａ、１７ｂを用いてもよい。
【００１４】
上記した構成を有する金属板穿孔装置において、穿孔部２は、例えば、図５に示す構成とすることができる。
即ち、図５に示すように、金属板穿孔用円板状ロール１の両側に、半径が金属板穿孔用円板状ロール１の中心から穿孔用刃部２の刃の最低部（側縁２３の最低部）までの長さより少なくとも金属板１０の厚さ分ほど短い長さとした一対の円板状ロール３を、上側サイドガイドロールとして同軸的に連結することによって上部ロール１１が形成されている。
金属板穿孔用円板状ロール１の円板の厚さよりわずかに大きい厚さを有する円板状ロールをガイドロール４として、その両側に、半径をガイドロール４の半径よりも少なくとも金属板１０の厚さ分に穿孔用刃部２の刃の最高部（前縁２１又は後縁２２）の突出量と最低部（側縁２３）の突出量の差を加えた長さよりも長くした一対の円板状ロール５を下側サイドガイドロールとして同軸的に連結することによって下部ロール１２が形成されている。
そして、上記した上部ロール１１と下部ロール１２を嵌合させることによって穿孔部２０が形成される。
【００１５】
本発明の金属板穿孔装置の穿孔部２０の他の例を図７に示す。図示するように、穿孔部２０は、金属板１０を中心にして上下対称に配列された金属板穿孔用円板状ロール１とガイドロール４によって構成されている。ここで、金属板穿孔用円板状ロール１の円板の厚さよりわずかに大きい厚さを有するガイドロール４は、その外周面上であって、金属板穿孔用円板状ロール１の外周面上に半径外方向に突出した状態で設けた複数の穿孔用刃部２と相対する位置に、穿孔用刃部２の平面刃部形状（即ち、穿孔断面）と同一の断面を有する複数の凹部４２を形成している。
また、ガイドロール４をゴムなどの弾性体で形成した場合は、ガイドロール４を、上記のように穿孔断面と同一の断面を有する凹部４２を形成することなく、平坦な外周面と有する円板から形成することもできる。この場合、穿孔時には、金属板穿孔用円板状ロール１に設けた穿孔用刃部２が上部ロール１２の外周部に食い込んでガイドロール４の外周部は穿孔用刃部２の形状に合わせて弾性変形するが、穿孔が終了して穿孔用刃片２がガイドロール４からはずれた際には、穿孔用刃部２の形状は元の平坦な外周面を有する円板に復元することになる。
さらに、金属板１０に、幅方向に平行間隔をあけて複数条の連続した孔を穿孔するために、図８に示すように、前記の穿孔部２０を構成する上部ロール１１及び下部ロール１２を、各ロールの軸方向に同軸的に複数組連結して金属板穿孔装置を構成することもできる。
【００１６】
本発明の穿孔用刃部２は、図１に示すように円板状ロール１の外周面上に周方向に一定の間隔を開けて等間隔で半径外方向に突出した状態で形成されており、円板状ロール１を回転させることにより、金属板１０は等間隔で未穿孔部分を設けて穿孔されるが、この穿孔用刃部２を外周面上に周方向に等間隔で設けず、隣接する穿孔用刃部２同士の一部の間隔を他の部分の間隔より広げて設ける、すなわち円板状ロール１の外周面上において、穿孔用刃部２が一部欠けた状態の円板状ロール１を作成し、これを回転させることにより、金属板１０は長手方向において、一定のピッチで穿孔部同士の間隔が他よりも大きい未穿孔部分を有して穿孔させることもできる。このように穿孔部同士の間隔が他よりも大きい未穿孔部分を一定のピッチで設け、大きな未穿孔部分で金属板１０を切断することができるようになる。特に、前記のように、穿孔部２０を構成する上部ロール１１及び下部ロール１２を、各ロールの軸方向に同軸的に複数組連結して金属板穿孔装置を構成して、金属板１０の幅方向で千鳥状の配列で穿孔させる場合、金属板１０を切断する際に、切断部が千鳥状に配列した穿孔部にかからずに切断することが可能となる。金属板１０を電池の芯体として用いる場合には、穿孔部同士の間隔が他よりも大きい未穿孔部分を電池１個分に要する芯体の長さとなるように一定のピッチで設けれることにより、金属板１０の長手方向の両端部が穿孔部にかからずに切断することができる。この他よりも大きい未穿孔部分のピッチは、円板状ロール１の径を選択することにより任意に変更することができる。
【００１７】
次に、本発明の金属板穿孔用円板状ロール１、及び、本発明の金属板穿孔装置を用いて金属板１０に連続的に多数の孔を穿孔する方法について、金属板穿孔用円板状ロール１の穿孔用刃部２の平面刃部形状（穿孔断面）が矩形である場合を例として、図４を参照しながら説明する。
本発明は、板厚が０. ０２〜０. ２ｍｍ程度の金属板１０、特に０. １ｍｍ以下の極薄の金属箔を穿孔することを目的とする。
上述したように、本発明の金属板穿孔装置は、図６に示すように穿孔部２０と、穿孔部２０の前方に設けた１対のピンチロール６ａ及び６ｂ、および穿孔部２０の後方に設けた１対のピンチロール７ａ及び７ｂからなる張力付与部３０から構成されている。ピンチロールは前述したように、図９に示すように、上下１対のブライドルロールに換えてもよい。
そして、金属板１０を穿孔するに際しては、まず、張力付与手段であるピンチロール６ａ及び６ｂと、７ａ及び７ｂの間で、金属板１０に張力を付与する。この張力付与状態を維持しながら、金属板１０を穿孔部２０、及び、張力付与部３０を構成するそれぞれの一対の上下ロール６ａ、６ｂ、及び、一対の上下ロール７ａ、７ｂ間に連続的に通板する。
【００１８】
このように、張力を付与した状態で金属板１０を穿孔部２０の上部ロール１１である金属板穿孔用円板状ロール１に接触させると、図４（ｉ）に示すように、まず、穿孔用刃部２の前縁２１おび前縁２１から延びる側縁２３の一部が金属板１０に食い込んで切れ目を生じる。
金属板穿孔用円板状ロール１をさらに回転させると、図４（ii) に示すように、穿孔用刃部２の前縁２１から延びる側縁２３の一部がさらに食い込み切れ目が伸びると同時に、穿孔用刃部２の後縁２２おび後縁２２から延びる側縁２３の一部が金属板１０に食い込んで切れ目を生じる。
金属板穿孔用円板状ロール１をさらに回転させると、図４（iii)に示すように、穿孔用刃部２の前縁２１から延びる側縁２３の一部がさらに食い込み、切れ目が伸びると同時に、穿孔用刃部２の後縁２２から延びる側縁２３の一部がさらに食い込み切れ目が伸びるようになり、側縁２３の切れ目が前縁２１及び後縁２２の両側から伸びて行くようになる。
そして、金属板穿孔用円板状ロール１をさらに回転させると、図４（iv) に示すように、前縁２１及び後縁２２の両側から伸びる側縁２３の切れ目が繋がり、金属板１０に矩形形状の孔が形成される。
金属板穿孔用円板状ロール１をさらに回転させると、次の穿孔用刃部２が金属板１０に食い込み、上記と同様にして矩形形状の孔が形成される。
このように金属板穿孔用円板状ロール１を回転させることにより、矩形形状の孔を間隔をあけて連続的に金属板１０に形成することができる。
この際、図３に示すように、円板状ロール１の回転に伴ってはじめに金属板１０を食い込む先行周方向端部を形成する前縁２１の刃高を、その後に金属板１０を食い込む後行周方向端部を形成する後縁２２よりも低くすることにより、前縁２１及び後縁２２を、金属板１０に同時に食い込むようにすることも可能であり、金属板１０により正確かつ確実に矩形孔を穿孔することができる。
【００１９】
また、図２に示すように、前縁２１と後縁２２の刃高より、両者間をなす部分の刃高を低くする、即ち、側縁２３の刃の部分が前縁２１及び後縁２２の刃の部分の頂点を結ぶ仮想直線２４よりも低く突出するように形成した金属板穿孔用円板状ロール１を用いた場合であっても、金属板１０に張力を付与しない状態で穿孔作業を実施した場合、特に金属板１０が０. １ｍｍ以下の厚さの極薄の金属箔である場合は金属板の剛性が低下し、前縁２１及び後縁２２の部分の刃が金属板１０に食い込みにくくなり、正確な形状の連続穿孔が困難となる。従って、０. １ｍｍ以下の厚さの極薄の金属箔を穿孔する場合、金属板１０に張力を付与することが望ましい。
【００２０】
また金属板１０を穿孔するに際して、図９に示すように、金属板１０がガイドロール２（下部ロール１２）の外周の一部に沿って巻き付くように進行させ、金属板１０が下部ロール１２に密着した状態で穿孔させることにより、０. １ｍｍ以下の厚さの極薄の金属箔をより確実に穿孔することが可能となる。この場合、張力付与手段である上下１対のブライドルロール１６ａ及び１６ｂと１７ａ及び１７ｂと、上部ロール１１と下部ロール１２とを図９に示すような位置関係、すなわち金属板１０を図６に示すように穿孔部２０と張力付与部３０の間で直線的に進行させるのではなく、ガイドロール２（下部ロール１２）の外周の一部に沿って進行するように各ロールの位置関係を定めて設ける。
【００２１】
図５及び図７では、金属板１０に一列に孔を形成させる場合を示したが、図８に示すように穿孔部２０を構成する下部ロール１２及び上部ロール１１をそれぞれのロールの軸方向に同軸的に複数組並べて配設して金属板穿孔装置を構成し、長手方向に間隔をあけて連続的に一列に並ぶ略矩形状の孔を、幅方向に複数条にわたって金属板１０に穿孔することができる。この場合、隣接する金属板穿孔用円板状ロール１の穿孔用刃部２のピッチを相互に調整することにより千鳥状に穿孔したり、格子状に穿孔するなど、任意の配列状態で穿孔することが可能である。
【００２２】
本発明の多数の孔を有する穿孔金属板は、このように上記した金属板穿孔用円板状ロール１を具備する金属板穿孔装置、及び、上記の穿孔方法を用いて作成することが可能である。また、本発明の多数の孔を有する穿孔金属板は、特に０. １ｍｍ以下の極薄の金属箔に、一様で均一な孔を連続して正確に穿孔でき、折り返し部分などの突設した部分もないので、二次電池電極基体用の穿孔金属板として好適である。
【００２３】
【実施例】
板厚１ｍｍの合金工具鋼（ＳＫＳ１）からなる直径８０ｍｍの円板の外周面上に、円周方向の長さ２. ６ｍｍ、幅１ｍｍの矩形の穿孔断面を有する穿孔用刃部を１. ５９ｍｍの間隔を開けて６０個半径外方向に突出するように設けた金属板穿孔用円板状ロール（上側ロール）を３０組作成した。
穿孔用刃部は、円板状ロールの厚さ方向の前後２個所に突設する矩形の前縁及び後縁の刃高（最高高さ）を１ｍｍ、周方向の左右の２個所に突設する側縁の中心の高さ（最低高さ）を０. ５ｍｍとし、前縁〜側縁の中心〜後縁にかけて、刃高が円弧状に連続的に変化するように突設した。
【００２４】
また、板厚１ｍｍの合金工具鋼（ＳＫＳ１）からなる直径８０ｍｍの円板状ロール（上側サイドガイドロール）を３１組作成し、両端がサイドガイドロールとなるようにし、かつサイドガイドロールと金属板穿孔用円板状ロールの間隔を０．０５ｍｍとなるようにスペーサーを挿入して調整して、金属板穿孔用円板状ロールとサイドガイドロールを交互に同軸的に並べて配設し、上部ロールとした。一方、１. １ｍｍの板厚を有する合金工具鋼（ＳＫＳ１）から直径８０ｍｍの円板状ロール（ガイドロール）を３０組作成し、また板厚１ｍｍの合金工具鋼（ＳＫＳ１）から直径８１ｍｍの円板状ロール（下側サイドガイドロール）を３１組作成し、両端がサイドガイドロールとなるようにしてガイドロールとサイドガイドロールを交互に同軸的に並べて配設し、下部ロールとした。
【００２５】
このようにして作成した上部ロールと下部ロールを嵌合させて穿孔部とした。なお、穿孔後の孔の配列が千鳥状となるように、隣接する上部ロールの穿孔用刃片の間隔を周方向に半ピッチずつずらせて並ぶように配設した。
さらに、この穿孔部の前方及び後方に、図９に示すように、金属板が穿孔部の下部ロールの外周の一部に沿って巻き付くように進行するような位置関係で、それぞれ１対のブライドルロールを設けて張力付与部を構成し、前方のブライドルロールの回転速度を後方のブライドルロールの回転速度よりわずかに大きく設定して、両者のブライドルロール間で金属板に張力が常時付与される構造とした。このようにして金属板穿孔装置を構成した。
【００２６】
次いで、上記した金属板穿孔装置を用いて、厚さ０. ０３５ｍｍ、幅６５ｍｍの長尺帯状のニッケルめっきを施した鋼箔を穿孔加工した。張力付与部の前方のブライドルロール、後方のブライドルロール、及び穿孔部の上下部ロールの回転速度は鋼箔が１ｍ／秒の速度で進行するようにそれぞれ設定した。また前方のブライドルロール及び後方のブライドルロール間で金属箔に２ｋｇｆの張力が作用するようにそれぞれのブライドルロールの回転速度を設定した。このようにして長さ２. ６ｍｍ、幅１ｍｍの矩形の孔を長さ方向に１. ５９ｍｍの間隔で連続的に穿孔し、幅方向に１. １ｍｍ間隔で千鳥状に３０列穿孔した穿孔ニッケルめっき鋼箔が得られた。
【００２７】
【発明の効果】
本発明は、円板状ロールの外周に、穿孔用刃部を周方向に間隔を開けて複数個半径外方向に突出状態に設けた金属板穿孔用円板状ロールを用いた金属板穿孔装置及び金属板穿孔方法であり、本発明の金属板穿孔装置及び金属板穿孔方法を用いることにより、長尺帯状の金属板、特に二次電池電極基体に用いる極薄の金属箔に均一な厚さを有しながら、連続的に一様な孔を多数個穿設することが可能となった。
【図面の簡単な説明】
【図１】本発明の金属板穿孔用円板状ロールを用いて金属板を穿孔する状態の例を示す模式図である。
【図２】本発明の金属板穿孔用円板状ロールの外周面に突出状態に設けた穿孔用刃部の形状の例を示す斜視図である。
【図３】本発明の金属板穿孔用円板状ロールを用いて金属板を穿孔する状態の他の例を示す模式図である。
【図４】本発明の金属板穿孔用円板状ロールを用いて金属板を穿孔する場合の金属板の穿孔様式を示す模式図である。
【図５】本発明の金属板穿孔装置の穿孔部の例を示す模式図である。
【図６】本発明の金属板穿孔装置の例を示す模式図である。
【図７】本発明の金属板穿孔装置の穿孔部の他の例を示す模式図である。
【図８】本発明の金属板穿孔装置の他の例を示す模式図である。
【図９】本発明の金属板穿孔装置の他の例を示す模式図である。
【符号の説明】
１：金属板穿孔用円板状ロール
２：穿孔用刃部
３：上側サイドガイドロール
４：ガイドロール
４２：凹部
５：下側サイドガイドロール
６ａ，６ｂ，７ａ，７ｂ：ピンチロール
１０：金属板
１１：上部ロール
１２：下部ロール
１３：スペーサ
１６ａ，１６ｂ，１７ａ，１７ｂ：ブライドルロール
２０：穿孔部
２１：前縁
２２：後縁
２３：側縁
２４：仮想直線
３０：張力付与部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disc-shaped roll for punching a metal plate that continuously drills a hole in a long strip-shaped metal plate or metal foil, a metal plate punching device using the roll, a metal plate punching method, and the metal The present invention relates to a perforated metal plate manufactured using a plate perforating apparatus and a metal plate perforating method.
[0002]
[Prior art]
In recent years, there has been an increasing demand for a perforated metal plate having a large number of holes for use in an electrode substrate of a secondary battery electrode. The perforated metal plate for the secondary battery electrode substrate is scraped off with the active material attached to the surface thereof, and filled in the battery container. At this time, the hole is formed in the metal plate for the purpose of providing an anchor effect for energizing the adhesion of the active material to the metal plate and filling the hole with the active material. In order to increase the battery capacity, it is necessary to fill the battery container with as much active material as possible. For this reason, a perforated metal plate for the electrode substrate is required to be as thin as possible.
Conventionally, as a method of manufacturing a perforated metal plate, a method of perforating using a punching press has been common, but a perforation method using a press device is that a metal plate to be perforated is supplied intermittently. Therefore, it is extremely difficult to increase the productivity of the punched metal plate by increasing the drilling speed in combination with applying a huge force to the press device during press working. Met.
[0003]
As a method for improving the productivity of a perforated metal plate by increasing the perforation speed, a method of continuously manufacturing a perforated metal plate by rotating a perforated roller having a large number of protrusions is disclosed in Japanese Patent Laid-Open No. 60-133936. It is disclosed in the gazette. This perforated metal plate is manufactured as follows. That is, first, a metal plate is continuously passed between a roller having a number of serrated projections on the outer peripheral surface and a receiving roller, whereby a hole is opened by the projection and at the same time a return is generated. The perforated metal plate is continuously advanced, the tip of the scratching jig provided in front is returned, and the return is folded. Further, the metal plate proceeds continuously, is sent to a rolling roller provided in front, and rolled, and the return bites into the metal plate to form a perforated metal plate without flash. When the above-described method for manufacturing a perforated metal plate is used, it is possible to continuously perforate, the perforation speed is increased, and the productivity of the perforated metal plate is improved.
[0004]
[Problems to be solved by the invention]
However, the method of continuously manufacturing a perforated metal plate by rotating the perforated roller having the above-described protrusion still has the following problems to be solved.
That is, the portion where the return is folded is nearly twice as thick as the original metal plate, and when used as a perforated metal plate for a secondary battery electrode substrate, the active material is adhered to the surface and scraped off. When the inside is filled, the volume of the metal plate itself is increased, so that the amount of filling of the active material is decreased accordingly, which is not preferable for increasing the battery capacity. Also, when strengthening the rolling and making the folded part the same thickness as the other part, the thickness of the folded part is nearly twice that of the other part, so that only this part is extremely rolled and extended. become. Accordingly, the interval between the perforated holes is widened, the perforation density is reduced, and when used as a perforated metal plate for a secondary battery electrode substrate, the anchor effect becomes insufficient and the active material filled in the hole portion The amount will also decrease, which is not preferable.
The present invention has been made in order to solve such a problem, and has a long strip-shaped metal strip, particularly an ultra-thin metal foil used for a secondary battery electrode base, while having a uniform thickness. A disk-shaped roll for punching a metal plate capable of drilling a large number of uniform holes, a metal plate punching device using the same, a metal plate punching method, and a metal plate punching device and a metal plate punching method therefor An object of the present invention is to provide a perforated metal plate formed by using the same.
[0005]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a disc-shaped roll for punching a metal plate, wherein a plurality of drilling blade portions are arranged on an outer peripheral surface of a disc-shaped roll having a certain thickness at intervals in the circumferential direction. In a disk-shaped roll for punching a metal plate formed in a state protruding in a direction, the planar blade shape on the outer peripheral surface of the drilling blade portion is a geometric shape surrounded by a single closing line, The shape of the side blade when the blade for drilling is viewed from the side is such that the blade height at both circumferential ends is higher than the blade height of other portions and the blade height is directed toward the center from both circumferential ends. To form a concave shape that gradually decreases,And in the side blade part shape of the blade part for drilling, the other circumferential end that follows the blade height of one circumferential end preceding the rotational direction of the disc-shaped roll in the rotational direction. Lower than the blade heightIt is characterized by that.
[0006]
In addition, the above-described disc-shaped roll for punching a metal plate isClaims 2 to 3As stated,
(1) The shape of the flat blade portion of the drilling blade portion is a rectangular shape or a substantially rectangular shape in which four corners are rounded,
(2) The planar blade shape of the drilling blade portion may be any one of an oval shape, an oval shape, a perfect circle shape, a rhombus shape, or a substantially rhombus shape with rounded corners. Has characteristics.
[0007]
Claim 4The metal plate punching device is a metal plate punching device that punches a plurality of holes in a metal plate or metal foil,Claim 1The disc-shaped roll for punching metal plate is an upper roll, and at least the metal on both sides of the upper roll has a radius from the center of the disc-shaped roll for punching metal plate to the lowest part of the blade for punching. A pair of upper side guide rolls that are made smaller than the thickness of the plate or metal foil are coaxially connected to form an upper roll, and a thickness slightly larger than the thickness of the disc-shaped roll for drilling the metal plate. The disc-shaped roll has a guide roll, and on both sides of the guide roll, the radius is larger than the radius of the disc-shaped roll, and the maximum blade height of the drilling blade portion is at least the thickness of the metal plate or metal foil. A lower roll is formed by coaxially connecting a pair of lower side guide rolls that are larger than a length obtained by adding a difference between the protrusion amount of the portion and the protrusion amount of the minimum blade height portion, and the upper roll and the lower roll are Mated A perforation part that can perforate while forming the metal plate or the metal foil is formed, and a tension applying unit including a tension applying unit that applies tension to the metal plate or the metal foil is provided at the front and rear of the perforation part, respectively. It is characterized by being arranged.
The above-described metal plate punching device isAs described in claim 5, according to claim 4A plurality of sets of the upper roll and the lower roll constituting the perforated portion are connected coaxially, and a plurality of strips can be perforated on the metal plate or metal foil.
[0008]
A metal plate punching device according to a sixth aspect of the present invention is the metal plate punching device according to the fourth or fifth aspect, wherein the metal plate or the metal foil is a part of an outer periphery of the guide roll so that the metal plate or the metal foil is punched while being wound around the guide roll. The upper roll, the lower roll, and the tension applying means are provided in such a positional relationship as to travel along the portion.
According to a seventh aspect of the present invention, there is provided the metal plate punching device according to the fourth or sixth aspect, wherein the tension applying means includes a pair of upper and lower pinch rolls that sandwich the metal plate or the metal foil.
According to an eighth aspect of the present invention, there is provided the metal plate punching device according to the fourth or sixth aspect, wherein the tension applying means includes a pair of upper and lower bridle rolls.
[0009]
A metal plate perforation method according to claim 9 is a metal plate perforation method for perforating the metal plate or metal foil using the metal plate perforation apparatus according to any one of claims 4 to 8, wherein While passing the metal plate or the metal foil through a pair of tension applying portions respectively disposed on the front and rear, while applying tension to the metal plate or the metal foil by the tension applying means constituting each of the tension applying portions, The upper and lower rolls constituting the perforated part are rotated to continuously perforate the metal plate or metal foil.
The perforated metal plate according to claim 10 is formed on the outer peripheral surface of a disc-shaped roll having a certain thickness in a state where a plurality of perforating blade portions protrude radially outwardly at intervals in the circumferential direction, The flat blade shape on the outer peripheral surface of the drilling blade portion is a geometric shape surrounded by a single closing line, and the side blade shape when the drilling blade portion is viewed from the side surface is the end in both circumferential directions. The blade height is higher than the blade height of the other portion, and the blade height is formed in a concave shape gradually decreasing from the circumferential end toward the center, and the side blade portion of the drilling blade portion For drilling a metal plate in which the blade height of one of the circumferential end portions preceding the rotation direction of the disk-shaped roll is lower than the blade height of the other circumferential end portion following in the rotation direction. The disc-shaped roll is the upper roll,
On both sides of the upper roll, a pair of upper side guide rolls having a radius smaller than the length from the center of the upper roll to the lowest part of the drilling blade is at least the thickness of the metal plate or metal foil is coaxial. To form an upper roll,
A disk-shaped roll having a thickness slightly larger than the thickness of the disk of the upper roll is used as a guide roll, and the radius is set at least on the both sides of the guide roll from the radius of the disk-shaped roll. A pair of lower side guide rolls that are larger than the length obtained by adding the difference between the protrusion amount of the maximum blade height portion and the protrusion amount of the minimum blade height portion to the thickness of the drilling blade portion are coaxially connected. Forming the lower roll,
The upper roll and the lower roll are fitted together to form a perforated portion that can be perforated while passing through the metal plate or metal foil, and tension is applied to the metal plate or the metal foil in front of and behind the perforated portion. Arrange each tension applying part consisting of tension applying means,
The metal plate or the metal foil is passed through a pair of tension applying portions respectively arranged at the front and rear of the perforated portion, and tension is applied to the metal plate or the metal foil by the tension applying means constituting the tension applying portion. On the other hand, the metal plate or the metal foil is continuously perforated by rotating up and down rolls constituting the perforated part.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
The disc-shaped roll for punching a metal plate of the present invention is intended to continuously drill a large number of holes in a metal plate or metal foil of about 0.02 to 0.2 mm.
As shown in FIG. 1, a plurality of perforating blade portions 2 are formed on the outer peripheral surface of the disk-shaped roll 1 in a state of protruding in the radially outward direction with a space in the circumferential direction.
The shape of the flat blade on the outer peripheral surface of the drilling blade 2, that is, the drilling cross section has a geometric shape surrounded by one closing line. In this embodiment, a rectangular shape is used.
As shown in FIG. 1 and FIG. 2, the side blade shape seen from the side surface of the drilling blade portion 2 is such that the blade height at the rear edges 21 and 22 is the other portion before forming the circumferential ends. The height is higher than the height, and the blade height is formed in a concave shape that gradually decreases from the front and rear edges 21 and 22 toward the center.
[0011]
That is, as shown in FIG. 2, the perforating blade portion 2 has both side edges 23 of the perforating blade portion 2 corresponding to the portions of the blocking lines on both sides facing each other along the circumferential direction of the disc-shaped roll 1. So that the cutting edges of the front and rear edges 21 and 22 protrude from the imaginary straight line 24 connecting the cutting edges of the rear edges 21 and 22 corresponding to the closed line portions on both sides facing each other along the thickness direction of the disc-shaped roll 1. Is formed.
As shown in FIG. 2, the shape of the flat blade portion of the drilling blade portion 2, i.e., the drilling cross section, is an accurate rectangular shape including a front edge 21, a rear edge 22, and a side edge 23, and four rectangular corner portions. It can also be made into the substantially rectangular shape which rounded.
[0012]
Moreover, the front edges 21 and 22 which form both circumferential direction ends on the outer peripheral surface of the disc-shaped roll 1 of the drilling blade portion 2 are accompanied with the rotation of the disc-shaped roll 1 as shown in FIG. First, the blade height of the leading edge 21 which is the preceding circumferential end that bites into the metal plate or metal foil (hereinafter, the metal plate and the metal foil are collectively referred to as the metal plate) 10 and then bites into the metal plate 10 thereafter. Can be made lower than the blade height of the trailing edge 22, which is the circumferential end. By forming the side surface shape of the drilling blade portion 2 in this way, the front edge 21 and the rear edge 22 can be bitten into the metal plate 10 simultaneously as shown in FIG.
Furthermore, the flat blade part shape of the drilling blade part 2 is replaced with the above-described rectangular shape or substantially rectangular shape, in accordance with the properties of the metal plate, other shapes such as an oval shape, an elliptical shape, a perfect circular shape, A desired geometric figure such as a rhombus shape or a substantially rhombus shape with four corners rounded can be used.
[0013]
Next, the structure of the metal plate punching device according to the present invention will be described with reference to FIG.
As shown in the drawing, the metal plate punching device includes a punching portion 20 and a tension composed of a pair of upper and lower pinch rolls 6a and 6b and 17a and 17b as tension applying means disposed in front and rear of the punching portion 20. It is comprised from the provision part 30. FIG. On the other hand, the perforating part 20 is configured by forming the perforating blade part 2 on the outer peripheral surfaces of the upper and lower rolls 11 and 12 with a space in the circumferential direction.
In addition, as shown in FIG. 9, a pair of upper and lower bridle rolls 16a, 16b and 17a, 17b may be used as the tension applying means.
[0014]
In the metal plate punching apparatus having the above-described configuration, the punching unit 2 can be configured as shown in FIG. 5, for example.
That is, as shown in FIG. 5, the radius is the lowest part (side edge 23) of the blade of the drilling blade portion 2 from the center of the metal plate drilling disc-shaped roll 1 on both sides of the metal plate drilling disc-shaped roll 1. The upper roll 11 is formed by coaxially connecting a pair of disc-shaped rolls 3 having a length shorter by at least the thickness of the metal plate 10 than the length up to the lowest part) as upper side guide rolls. .
A disc-shaped roll having a thickness slightly larger than the thickness of the disc of the disc-shaped roll 1 for punching the metal plate is used as the guide roll 4, and the radius of the metal plate 10 is at least on both sides of the radius of the guide roll 4. A pair of circles that are longer than the length obtained by adding the difference between the protruding amount of the highest part (front edge 21 or rear edge 22) and the lowest part (side edge 23) of the blade of the drilling blade part 2 to the thickness. A lower roll 12 is formed by coaxially connecting the plate roll 5 as a lower side guide roll.
And the perforated part 20 is formed by making the above-mentioned upper roll 11 and the lower roll 12 fit.
[0015]
Another example of the punching unit 20 of the metal plate punching apparatus of the present invention is shown in FIG. As shown in the drawing, the perforating part 20 is constituted by a metal plate perforating disk-shaped roll 1 and a guide roll 4 that are arranged vertically symmetrically about the metal plate 10. Here, the guide roll 4 having a thickness slightly larger than the thickness of the disc of the disc-shaped roll 1 for punching the metal plate is on the outer peripheral surface thereof, and the outer peripheral surface of the disc-shaped roll 1 for punching the metal plate. A plurality of recesses having the same cross section as the shape of the flat blade part of the drilling blade part 2 (that is, the drilling cross section) at a position facing the plurality of drilling blade parts 2 provided in a state of projecting radially outward on the top. 42 is formed.
When the guide roll 4 is formed of an elastic body such as rubber, the guide roll 4 has a flat outer peripheral surface without forming the recess 42 having the same cross section as the perforated cross section as described above. It can also be formed from. In this case, at the time of drilling, the punching blade portion 2 provided on the disk-shaped roll 1 for punching the metal plate bites into the outer peripheral portion of the upper roll 12, and the outer peripheral portion of the guide roll 4 matches the shape of the punching blade portion 2. Although it is elastically deformed, when the drilling blade piece 2 is detached from the guide roll 4 after the drilling is completed, the shape of the drilling blade portion 2 is restored to a disk having the original flat outer peripheral surface. .
Further, in order to perforate a plurality of continuous holes in the metal plate 10 with a parallel interval in the width direction, as shown in FIG. 8, an upper roll 11 and a lower roll 12 constituting the perforated part 20 are provided. The metal plate punching device can also be configured by connecting a plurality of sets coaxially in the axial direction of each roll.
[0016]
As shown in FIG. 1, the punching blade portion 2 of the present invention is formed on the outer peripheral surface of the disc-shaped roll 1 in a state of projecting radially outward at regular intervals with a constant interval in the circumferential direction. By rotating the disk-shaped roll 1, the metal plate 10 is perforated by providing unperforated portions at equal intervals, but this perforating blade portion 2 is not provided on the outer peripheral surface at equal intervals in the circumferential direction. A disc in which a portion of the adjacent perforating blade portions 2 is provided wider than the interval of the other portions, that is, a state where a portion of the perforating blade portion 2 is missing on the outer peripheral surface of the disc-shaped roll 1. By forming the roll 1 and rotating it, the metal plate 10 can also be perforated with an unperforated portion having a larger pitch than the others at a constant pitch in the longitudinal direction. As described above, the unperforated portions having a larger interval between the perforated portions than the others are provided at a constant pitch, and the metal plate 10 can be cut at the larger unperforated portions. In particular, as described above, a plurality of upper rolls 11 and lower rolls 12 constituting the perforating unit 20 are coaxially connected in the axial direction of each roll to constitute a metal plate perforating apparatus, and the width of the metal plate 10 When perforating in a staggered arrangement in the direction, when the metal plate 10 is cut, it is possible to cut without cutting the perforated parts arranged in a staggered manner. When the metal plate 10 is used as a battery core, by providing an unperforated portion having a larger interval between the perforated portions than the other at a constant pitch so as to be the length of the core required for one battery. The both ends of the metal plate 10 in the longitudinal direction can be cut without going to the perforated part. The pitch of the unperforated part larger than this can be arbitrarily changed by selecting the diameter of the disc-shaped roll 1.
[0017]
Next, regarding the disk-shaped roll 1 for punching a metal plate of the present invention and the method for continuously drilling a large number of holes in the metal plate 10 using the metal plate punching apparatus of the present invention, the disk for punching a metal plate An example in which the shape of the flat blade portion (perforation section) of the perforating blade portion 2 of the cylindrical roll 1 is rectangular will be described with reference to FIG.
An object of the present invention is to perforate a metal plate 10 having a thickness of about 0.02 to 0.2 mm, particularly an ultrathin metal foil having a thickness of 0.1 mm or less.
As described above, the metal plate punching device of the present invention is provided in the rear of the punching portion 20, the pair of pinch rolls 6a and 6b provided in front of the punching portion 20, and the punching portion 20, as shown in FIG. In addition, it is composed of a tension applying unit 30 composed of a pair of pinch rolls 7a and 7b. As described above, the pinch roll may be replaced with a pair of upper and lower bridle rolls as shown in FIG.
When punching the metal plate 10, first, tension is applied to the metal plate 10 between the pinch rolls 6a and 6b, which are tension applying means, and 7a and 7b. While maintaining this tension application state, the metal plate 10 is continuously formed between the pair of upper and lower rolls 6a and 6b and the pair of upper and lower rolls 7a and 7b constituting the punching unit 20 and the tension application unit 30. Pass through.
[0018]
In this way, when the metal plate 10 is brought into contact with the metal plate perforating disc-shaped roll 1 which is the upper roll 11 of the perforating part 20 in a state where tension is applied, first, as shown in FIG. A part of the front edge 21 and the side edge 23 extending from the front edge 21 of the cutting blade 2 bites into the metal plate 10 to form a cut.
When the disc-shaped roll 1 for punching the metal plate is further rotated, as shown in FIG. 4 (ii), a part of the side edge 23 extending from the front edge 21 of the punching blade portion 2 further bites and the cut line extends. A part of the rear edge 22 and the side edge 23 extending from the rear edge 22 bites into the metal plate 10 to form a cut.
When the disc-shaped roll 1 for punching the metal plate is further rotated, as shown in FIG. 4 (iii), a part of the side edge 23 extending from the front edge 21 of the punching blade 2 further bites and the cut extends. At the same time, a part of the side edge 23 extending from the rear edge 22 of the drilling blade portion 2 further bites in, so that the cut of the side edge 23 extends from both sides of the front edge 21 and the rear edge 22. Become.
When the disk-shaped roll 1 for punching the metal plate is further rotated, the cuts of the side edges 23 extending from both sides of the front edge 21 and the rear edge 22 are connected as shown in FIG. A rectangular hole is formed.
When the disk-shaped roll 1 for punching the metal plate is further rotated, the next punching blade portion 2 bites into the metal plate 10, and a rectangular hole is formed in the same manner as described above.
Thus, by rotating the disk-shaped roll 1 for punching a metal plate, rectangular holes can be continuously formed on the metal plate 10 at intervals.
At this time, as shown in FIG. 3, after the bite height of the front edge 21 that forms the preceding circumferential end that bites the metal plate 10 first with the rotation of the disc-shaped roll 1, and then bites the metal plate 10. It is possible to bite the front edge 21 and the rear edge 22 into the metal plate 10 at the same time by making it lower than the rear edge 22 forming the end in the row circumferential direction. A rectangular hole can be drilled.
[0019]
Further, as shown in FIG. 2, the blade height of the portion between the leading edge 21 and the trailing edge 22 is made lower than the leading edge 21 and the trailing edge 22, that is, the blade portion of the side edge 23 is the leading edge 21 and the trailing edge 22. Even when the disk-shaped roll 1 for punching a metal plate formed so as to protrude lower than a virtual straight line 24 connecting the apexes of the blade portions of the metal plate is drilled without applying tension to the metal plate 10 In particular, when the metal plate 10 is an ultrathin metal foil having a thickness of 0.1 mm or less, the rigidity of the metal plate is lowered, and the blades at the front edge 21 and the rear edge 22 are formed on the metal plate 10. Therefore, it is difficult to continuously drill holes with an accurate shape. Therefore, when punching an extremely thin metal foil having a thickness of 0.1 mm or less, it is desirable to apply tension to the metal plate 10.
[0020]
Further, when drilling the metal plate 10, as shown in FIG. 9, the metal plate 10 is advanced so as to wind around a part of the outer periphery of the guide roll 2 (lower roll 12), and the metal plate 10 is moved to the lower roll 12. By perforating the metal foil in close contact with the metal, it is possible to more reliably perforate an ultrathin metal foil having a thickness of 0.1 mm or less. In this case, the pair of upper and lower bridle rolls 16a and 16b and 17a and 17b, which are tension applying means, and the upper roll 11 and the lower roll 12 are positioned as shown in FIG. 9, that is, the metal plate 10 is shown in FIG. In this way, the positional relationship between the rolls is determined so as to advance along a part of the outer periphery of the guide roll 2 (lower roll 12) instead of linearly moving between the punching section 20 and the tension applying section 30. Provide.
[0021]
5 and 7 show the case where the holes are formed in a row in the metal plate 10, but as shown in FIG. 8, the lower roll 12 and the upper roll 11 constituting the perforated portion 20 are arranged in the axial direction of each roll. A plurality of coaxial sets are arranged side by side to form a metal plate punching device, and substantially rectangular holes arranged continuously in a row at intervals in the longitudinal direction are punched in the metal plate 10 across a plurality of strips in the width direction. be able to. In this case, the holes are punched in an arbitrary arrangement state such as punching in a zigzag pattern or drilling in a lattice pattern by mutually adjusting the pitch of the punching blade portions 2 of the adjacent disc-shaped rolls 1 for drilling a metal plate. It is possible.
[0022]
The perforated metal plate having a large number of holes of the present invention can be produced by using the metal plate perforating apparatus including the above-described disk-shaped roll 1 for perforating a metal plate and the above perforating method. is there. Further, the perforated metal plate having a large number of holes of the present invention is capable of continuously and accurately perforating uniform and uniform holes on an ultrathin metal foil of 0.1 mm or less and projecting a folded portion or the like. Since there is no portion, it is suitable as a perforated metal plate for a secondary battery electrode substrate.
[0023]
【Example】
On the outer peripheral surface of a disk having a diameter of 80 mm made of alloy tool steel (SKS1) having a thickness of 1 mm, a drilling blade portion having a rectangular drilling cross section having a circumferential length of 2.6 mm and a width of 1 mm is 1.59 mm. Thirty sets of disc-shaped rolls (upper rolls) for punching metal plates provided so as to protrude outward in the radial direction with an interval of.
The blade for punching has a rectangular blade height (maximum height) of 1 mm and protrudes at two locations on the left and right in the circumferential direction. The center height (minimum height) of the side edge to be set was 0.5 mm, and the blade height was projected from the front edge to the center of the side edge to the rear edge so as to continuously change in an arc shape.
[0024]
In addition, 31 sets of 80 mm diameter disk-shaped rolls (upper side guide rolls) made of alloy tool steel (SKS1) with a thickness of 1 mm were prepared so that both ends became side guide rolls, and the side guide rolls and metal plates A spacer is inserted and adjusted so that the interval between the disc-shaped rolls for punching is 0.05 mm, and the disc-shaped rolls for punching metal plates and the side guide rolls are arranged alternately and coaxially, and the upper roll It was. On the other hand, 30 sets of disk-shaped rolls (guide rolls) having a diameter of 80 mm are made from an alloy tool steel (SKS1) having a thickness of 1.1 mm, and a circle having an diameter of 81 mm from an alloy tool steel (SKS1) having a thickness of 1 mm. Thirty-one sets of plate rolls (lower side guide rolls) were prepared, and the guide rolls and side guide rolls were arranged alternately and coaxially so that both ends became side guide rolls, thereby forming a lower roll.
[0025]
The upper roll and the lower roll thus created were fitted to form a perforated part. In addition, it arrange | positioned so that the space | interval of the blade piece for perforation | boring of an adjacent upper roll may be shifted and arranged in the circumferential direction by a half pitch so that the arrangement | sequence of the hole after perforation may become a staggered pattern.
Furthermore, as shown in FIG. 9, a pair of metal plates are moved forward and backward along the perimeter of the lower roll of the perforated part so as to wrap around the outer periphery of the lower roll of the perforated part. A bridle roll is provided to form a tension applying unit, and the rotational speed of the front bridle roll is set slightly higher than the rotational speed of the rear bridle roll so that tension is always applied to the metal plate between the two bridle rolls. The structure. In this way, a metal plate punching device was configured.
[0026]
Next, using the above-described metal plate punching apparatus, a steel foil plated with a long strip of nickel having a thickness of 0.035 mm and a width of 65 mm was punched. The rotational speeds of the front bridle roll, the rear bridle roll of the tension applying section, and the upper and lower rolls of the punched section were set so that the steel foil traveled at a speed of 1 m / sec. The rotational speed of each bridle roll was set so that a tension of 2 kgf acts on the metal foil between the front bridle roll and the rear bridle roll. In this way, a perforated nickel having 2.6 mm length and 1 mm width rectangular holes continuously drilled at intervals of 1.59 mm in the length direction and 30 rows staggered at intervals of 1.1 mm in the width direction. A plated steel foil was obtained.
[0027]
【The invention's effect】
The present invention relates to a metal plate punching apparatus using a disk-shaped roll for punching a metal plate, in which a plurality of blades for punching are provided in a circumferentially spaced manner on the outer periphery of the disk-shaped roll. And a metal plate perforation method, and by using the metal plate perforation apparatus and the metal plate perforation method of the present invention, a uniform thickness can be obtained on a long strip-shaped metal plate, particularly an ultrathin metal foil used for a secondary battery electrode substrate. It is possible to drill a large number of uniform holes continuously.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an example of a state in which a metal plate is perforated using a disc-shaped roll for perforating a metal plate of the present invention.
FIG. 2 is a perspective view showing an example of the shape of a punching blade portion provided in a protruding state on the outer peripheral surface of a metal plate punching disc-shaped roll of the present invention.
FIG. 3 is a schematic view showing another example of a state in which a metal plate is perforated using the disc-shaped roll for punching a metal plate of the present invention.
FIG. 4 is a schematic diagram showing a drilling mode of a metal plate in the case of drilling a metal plate using a disk-shaped roll for punching a metal plate of the present invention.
FIG. 5 is a schematic view showing an example of a perforation part of the metal plate perforation apparatus of the present invention.
FIG. 6 is a schematic view showing an example of a metal plate punching device of the present invention.
FIG. 7 is a schematic view showing another example of a punching portion of the metal plate punching apparatus of the present invention.
FIG. 8 is a schematic view showing another example of the metal plate punching device of the present invention.
FIG. 9 is a schematic view showing another example of the metal plate punching device of the present invention.
[Explanation of symbols]
1: Disc-shaped roll for drilling metal plates
2: Blade for drilling
3: Upper side guide roll
4: Guide roll
42: recess
5: Lower side guide roll
6a, 6b, 7a, 7b: pinch roll
10: Metal plate
11: Upper roll
12: Lower roll
13: Spacer
16a, 16b, 17a, 17b: Bridle roll
20: Perforated part
21: Leading edge
22: trailing edge
23: side edge
24: Virtual straight line
30: Tension applying part

Claims

In the disc-shaped roll for drilling a metal plate formed on the outer circumferential surface of the disc-shaped roll having a certain thickness, with a plurality of drilling blade portions protruding radially outwardly at intervals in the circumferential direction. The planar blade shape on the outer peripheral surface of the drilling blade portion is a geometric shape surrounded by a single closing line, and the side blade shape when the drilling blade portion is viewed from the side surface is formed in both circumferential directions. The blade height at the end portion is higher than the blade height of the other portion and the blade height is formed in a concave shape gradually lowering toward the central portion than the both circumferential end portions,
And in the side blade part shape of the blade part for drilling, the other circumferential end that follows the blade height of one circumferential end preceding the rotational direction of the disc-shaped roll in the rotational direction. A disc-shaped roll for punching a metal plate, characterized by being lower than the blade height of the part .

2. The disc-shaped roll for drilling a metal plate according to claim 1, wherein the shape of the flat blade portion of the blade portion for punching is a rectangular shape or a substantially rectangular shape having four corners rounded.

Claims the planar blade section shape of the drilling blade section, oval, elliptical, a round shape, characterized in that either a substantially rhombic shape with rounded rhombic shape or four corners, Item 2. A disk-shaped roll for punching a metal plate according to Item 1 .

A metal plate perforating apparatus for perforating a plurality of holes in a metal plate or a metal foil, wherein the disc-shaped roll for punching a metal plate according to claim 1 is an upper roll, and the radius is set on both sides of the upper roll. A pair of upper side guide rolls that are smaller than the length from the center of the disc-shaped roll for drilling the metal plate to the lowest part of the drilling blade by at least the thickness of the metal plate or metal foil are coaxially connected. An upper roll is formed, and a disk-shaped roll having a thickness slightly larger than the thickness of the disk-shaped roll for punching the metal plate is used as a guide roll, and the radius is set on both sides of the guide roll. A pair of at least the thickness of the metal plate or metal foil plus a length obtained by adding a difference between the protrusion amount of the maximum blade height portion and the protrusion amount of the minimum blade height portion to the thickness of the metal plate or metal foil. Coaxial lower side guide roll Forming a lower roll by connecting to the upper roll and the lower roll, forming a perforated portion that can be perforated while passing through the metal plate or metal foil, on the front and rear of the perforated portion, A metal plate perforating apparatus, comprising tension applying portions each including a tension applying means for applying tension to a metal plate or a metal foil.

5. The metal according to claim 4 , wherein a plurality of sets of the upper roll and the lower roll constituting the perforated part are coaxially connected, and the metal plate or the metal foil can be perforated by a plurality of strips. Plate punching device.

In such a positional relationship that the metal plate or metal foil travels along a part of the outer periphery of the guide roll so that the metal plate or metal foil is perforated while being wound around the guide roll, the upper roll and the The metal plate punching device according to claim 4 or 5 , wherein a lower roll and the tension applying means are provided.

The metal plate perforating apparatus according to claim 4 or 6, wherein the tension applying means comprises a pair of upper and lower pinch rolls that sandwich the metal plate or metal foil.

The metal plate punching device according to claim 4 or 6, wherein the tension applying means comprises a pair of upper and lower bridle rolls.

A metal plate punching method for punching the metal plate or the metal foil using the metal plate punching device according to any one of claims 4 to 8 , wherein a pair of tensions respectively disposed on the front and rear sides of the punching portion. The metal plate or the metal foil is passed through the applying part, and the upper and lower rolls constituting the perforated part are rotated while applying the tension to the metal plate or the metal foil by the tension applying means constituting the tension applying part. The metal plate or metal foil is continuously perforated.

On the outer peripheral surface of the disc-shaped roll having a certain thickness, a plurality of perforating blade portions are formed in a state of projecting radially outward at intervals in the circumferential direction, and on the outer peripheral surface of the perforating blade portion The flat blade shape is a geometric shape surrounded by a single closed line, and the side blade shape when the drilling blade portion is viewed from the side is the blade height at the other circumferential ends. In the shape of the side blade of the drilling blade, the blade height is higher than the height and the blade height is gradually lowered from the circumferential ends toward the center. A disc-shaped roll for punching a metal plate, in which the blade height of one circumferential end portion preceding in the rotation direction is lower than the blade height of the other circumferential end portion following in the rotation direction, is an upper roll,
On both sides of the upper roll, a pair of upper side guide rolls having a radius smaller than the length from the center of the upper roll to the lowest part of the drilling blade at least the thickness of the metal plate or metal foil are coaxial. To form an upper roll,
A disc-shaped roll having a thickness slightly larger than the thickness of the disc of the upper roll is used as a guide roll, and the radius is set at least on the both sides of the guide roll from the radius of the disc-shaped roll. A pair of lower side guide rolls that are larger than the length obtained by adding the difference between the protruding amount of the maximum blade height and the protruding amount of the minimum blade height to the thickness of the drilling blade are coaxially connected. Forming the lower roll,
The upper roll and the lower roll are fitted to each other, a perforated portion that can be perforated while passing through the metal plate or the metal foil is formed, and tension is applied to the metal plate or the metal foil at the front and rear of the perforated portion. Arrange each tension applying part consisting of tension applying means,
The metal plate or the metal foil is passed through a pair of tension applying portions respectively disposed at the front and rear of the perforated portion, and tension is applied to the metal plate or the metal foil by the tension applying means constituting the tension applying portion. On the other hand, a perforated metal plate formed by continuously perforating the metal plate or metal foil by rotating the upper and lower rolls constituting the perforated part.