JP3663148B2 - Work immersion device and work fluid draining mechanism - Google Patents

Work immersion device and work fluid draining mechanism Download PDF

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JP3663148B2
JP3663148B2 JP2001141628A JP2001141628A JP3663148B2 JP 3663148 B2 JP3663148 B2 JP 3663148B2 JP 2001141628 A JP2001141628 A JP 2001141628A JP 2001141628 A JP2001141628 A JP 2001141628A JP 3663148 B2 JP3663148 B2 JP 3663148B2
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workpiece
trough
work
liquid
immersion
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JP2002336930A (en
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亮祐 福地
健一郎 池田
理 藤田
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田中プレス工業株式会社
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Description

【0001】
【発明の属する技術分野】
本発明は、プレス機等によって冷間鍛造されるワークを潤滑剤等の液体に浸漬するワーク浸漬装置、及び、浸漬されたワークの液切りを行うワーク液切り機構に関する。
【0002】
【従来の技術】
冷間鍛造されるワークは、プレス機に搬送られる前に、種々の液体に浸漬される。例えば、一般の塑性加工用潤滑処理では、脱脂工程、水洗工程、酸洗工程、化成皮膜処理工程、潤滑剤塗布工程等、水や潤滑剤等の種々の液体にワークが浸漬される。また、近年、新しい冷間鍛造用潤滑処理方法、及び潤滑剤も開発されている。即ち、化成皮膜処理工程を行わずにワークに潤滑剤を塗布し乾燥させて、冷間鍛造用の水性乾式の潤滑剤の乾燥皮膜をワークに形成する方法である。この潤滑剤は冷間鍛造用一工程潤滑剤とも称され、例えば、「日本パーカライジング(株)」製の商品名「ファインリューベE700シリーズ」等がある。
【0003】
【発明が解決しようとする課題】
ところで、潤滑剤等にワークを浸漬する場合、その後の液切りが重要となる。浸漬したワークの表面に潤滑剤の液溜まりがあると膜厚が不均一になり、液体が水や酸等の場合においても、次工程への持ち込みを最小限にする観点から浸漬後における素早い液切りが要求されることがある。
【0004】
一方、ワークをひとつずつ処理するインライン式とは異なり、ワークを所定個数ひとまとめにして一括処理するバッチ式の場合には、一度に浸漬した所定個数のワークを均一に液切りする必要がある。そのため、ワークを容器に所定個数入れて浸漬した後に、そのワークを容器から別の液切りステーションにまとめて移載し、そこで例えばエアノズル等で液切りするという手法が考えられる。
【0005】
しかしながら、ワークを移載する構成では、装置が大型複雑化するのみならず、移載のために浸漬後に素早く液切りするには限界がある。
更には、液切りの構成については、インライン式、バッチ式によらず、ワークの形状が複雑であったり窪み部分があったりした場合、その部分の液切りが容易ではない。例えば、搬送されてきたワークにエアノズルでエアを噴き付けて残余の液体を除去する液切りの構成では、ワークの向きが一定であるためエアが当たりにくい箇所の液切りが容易でない。
【0006】
それゆえに本発明は、浸漬したワークの液切りを素早く確実に行うことのできるワーク浸漬装置及びワーク液切り機構を提供することを課題とする。
【0007】
【課題を解決するための手段】
本発明は、上記課題を解決すべくなされたものであり、本発明に係るワーク浸漬装置は、冷間鍛造用のワークを容器に所定個数入れて潤滑剤等の液体に浸漬するワーク浸漬装置であって、底部に多数の液切り孔を有し且つ後ろ側が後壁で塞がれた前記容器としてのトラフと、該トラフをその下側所定領域が液体に漬かったワーク浸漬位置と液上で浸漬後のワークを前側へ払い出すワーク払い出し位置とに上下に移動させるトラフ駆動手段と、ワーク払い出し位置においてワークを振動によって前進させて前側へ払い出すべくトラフを振動させる振動機とを備えたことを特徴とする。
尚、ワークを容器に所定個数入れる方法としては、液上で入れる方法以外に、液体に下側所定領域が漬かった状態の容器にワークを投入する方法もある。
【0008】
特に、トラフは、ワーク浸漬位置では底部のうち後ろ側のみ液体に漬かるように前上がりに傾斜し且つ、ワーク払い出し位置では略水平となることが好ましい。この場合、ワークは液体に漬かっていない底部の前側領域を通過して払い出されることになり、払い出される前にトラフの前側領域からワークに潤滑剤が付着するということを防止できる。
【0009】
その場合、トラフ駆動手段は、トラフの前側を支点としてトラフの後ろ側を上下に回動させてトラフをワーク浸漬位置とワーク払い出し位置とに移動させることがトラフ駆動手段の簡素化の点で好ましい。
【0010】
また、トラフの後壁に多数の液切り孔が形成されていることが好ましい。
【0011】
また、振動機はトラフをワーク浸漬位置においても振動させることが、ワークへの液なじみ、ワーク投入時における衝撃音とワーク傷つきの抑制、及び、液体の攪拌効果の点で好ましい。
【0012】
また、トラフの底部には、後ろ側より前側が低くなる段部が設けられていることが好ましく、段部においてワークの向きを変えることができ、特に、凹部を有するワークに対して効果が大きい。
【0013】
その場合、段部が間隔をおいて複数設けられ、且つ、段部の段差は二種類以上あることが好ましい。段部の段差を二種類以上設けることで、より多くのワーク形状に対して効果が得られ、また、ワークの向きの変わり具合にも変化ができる。
【0014】
更に、ワーク払い出し位置において略水平状態を中心にトラフをその幅方向の軸線まわりに所定角度揺動させるトラフ揺動手段を備えることが好ましい。トラフが上下に揺動することで、段部においてワークの向きがより一層変わりやすくなる。
【0015】
また、本発明に係るワークの液切り機構は、潤滑剤等の液体に浸漬された冷間鍛造用のワークが載置され且つ底部に多数の液切り孔を有するトラフと、ワークが振動によって前進するようにトラフを振動させる振動機とを備え、トラフの底部には、後ろ側より前側が低くなる段部が設けられていることを特徴とする。
【0016】
特に、トラフをその幅方向の軸線まわりに所定角度揺動させるトラフ揺動手段を備えることが好ましい。また、段部が間隔をおいて複数設けられ、且つ、段部の段差は二種類以上あることが好ましい。
【0017】
【発明の実施の形態】
以下、図1乃至図3を参酌しつつ本発明の一実施形態におけるワーク液切り機構、及び該機構を備えたワーク浸漬装置について説明する。
図1乃至図3において、冷間鍛造用の所定個数のワークを一括的に潤滑処理するバッチ式の冷間鍛造用潤滑処理装置を示している。該潤滑処理装置は、化成皮膜処理工程を行わずにワークに冷間鍛造用の潤滑剤を塗布し乾燥させてワーク表面に潤滑剤の乾燥皮膜を形成する。潤滑剤としては上述した冷間鍛造用一工程潤滑剤を使用する。かかる潤滑処理装置は、上流側から順に、ワーク投入装置1と、ワーク浸漬装置2と、ワーク乾燥装置3とから構成される。
【0018】
ワーク投入装置1は、断面視略V字状のホッパー4内に多量のワークWを貯えると共に、ホッパー4内から少量ずつ略一定量(略一定個数)のワークWを切り出してワーク浸漬装置2に投入する。かかる略一定量のワークWを切り出す手段として、ワーク投入装置1は、二段切り出しリフター5を備える。該二段切り出しリフター5は、一定厚みの傾斜ガイド6によってガイドされて斜めに昇降可能なリフター7と、該リフター7を昇降させる昇降手段としてのリフター駆動チェーン8とを備えている。該リフター駆動チェーン8は、モータ9によって前後二方向に駆動され、リフター7は連結部10によって該チェーン8に固定されている。
【0019】
リフター7は、傾斜ガイド6の表側(上流側)に位置する第一リフト部11と、傾斜ガイド6の裏側(下流側)に位置する第二リフト部12とを有している。両リフト部11,12は傾斜ガイド6の下方位置で各々の基端部同士が連結されて、リフター7は図1のように斜め上方に開口した断面視略コの字状に形成されている。即ち、リフター7は両リフト部11,12間に傾斜ガイド6を挟み込むように構成されて、両リフト部11,12共にその先端面11a,12aでワークWを押す構成である。第一リフト部11は、第二リフト部12より短く、その先端面11aは、図1に実線にて示す下降位置ではホッパー4の後壁13と略面一となり、また、同図に二点鎖線にて示す上昇位置では傾斜ガイド6の上端面6aと略面一となる。第二リフト部12の先端面12aは、同図に実線にて示す下降位置では、傾斜ガイド6の上端面6aと略面一となり、また、同図に二点鎖線にて示す上昇位置ではホッパー4の前壁14の上端部14aと略面一となる。
【0020】
従って、モータ9が正転してリフター7を上昇させると、傾斜ガイド6とホッパー4の後壁13との間に溜められたワークWのうちの一部が、第一リフト部11によって分離されると共に傾斜ガイド6の上端面6aまで押し上げられ、傾斜ガイド6の上端面6aと上昇位置にある第二リフト部12の表面との間に積載される。そして、モータ9が逆転してリフター7が下降して第二リフト部12が下降位置になると、傾斜ガイド6の上端面6aに積載されていたワークWの一部が第二リフト部12の先端面12aに滑り落ちる。その後、リフター7が再び上昇すると、このワークWのうちの一部が第二リフト部12で分離されると共にホッパー4の前壁14の上端部14aまで押し上げられ、該前壁14の上端部14aに設けられた投入用シュート15を介してワーク浸漬装置2に投入される。
【0021】
ここで、投入用シュート15は、その基端部において前壁14の上端部14aに回動自在に支持され、エアシリンダ16等の駆動手段によって基端部を支点として上下に所定角度回動するよう構成されている。
【0022】
このように、二段切り出しリフター5を採用することにより、ワーク浸漬装置2に投入するワークWの分量のバラツキを抑制することができる。
【0023】
次に、ワーク浸漬装置2について説明する。本実施形態におけるワーク浸漬装置2は、所定個数のワークWを潤滑剤に一括浸漬するバッチ式の潤滑剤塗布装置として構成されている。所定量の液体が貯えられる液槽には潤滑剤が貯えられて、液槽は潤滑槽20として構成されている。また、本実施形態におけるワーク浸漬装置2は、所定個数のワークWを容器に入れて潤滑剤に浸漬するが、該容器に、浸漬後においてワークWに付着した余剰の潤滑剤を除去するワーク液切り機構が備えられている。以下、詳述する。
【0024】
ワーク乾燥装置3とワーク投入装置1との間に潤滑槽20が設置されている。該潤滑槽20内の潤滑剤(潤滑液)は、例えば50℃乃至70℃の範囲に設定されている。かかる潤滑剤を所定の温度に加熱維持するために、潤滑槽20は湯槽21内に設置されて温浴される。湯槽21には所定の温度に維持された湯が溜められている。尚、湯槽21は、台車22上に設置されて移動可能である。
【0025】
かかる潤滑槽20の上方に、前記容器として、所定個数のワークWを底部23に積載可能なように上側に開口した断面視略コの字状のトラフ24が、前側がワーク乾燥装置3に向き後ろ側がワーク投入装置1の投入用シュート15に向くよう吊下支持されている。該トラフ24は、その後ろ側が後壁25で塞がれて前側から浸漬後のワークWを払い出すよう構成され、その底部23には、多数の丸孔状の液切り孔が形成されている。後壁25は底部23に対して略直角をなすように底部23の後端から上方に形成されており、該後壁25にも同様に多数の丸孔状の液切り孔が形成されている。即ち、底部23の大部分と後壁25は共に網目状に形成されている。尚、底部23の前端部所定長さ領域は、液切り孔が設けられていない平滑面26となっている。該トラフ24は後述するように略水平状態と前上がりに傾斜した傾斜状態とをとるが、図1に示す略水平状態において平滑面26は前側に僅かに下降している。
【0026】
更に、底部23には、後ろ側より前側が低くなる段部27が幅方向に沿って形成されている。該段部27は前後方向に間隔をおいて複数設けられ、これにより底部23は前側に向かって下降する階段状に形成されている。尚、図1に示す略水平状態において各段部27間領域は水平面となっている。また、段部27の段差は大小二種類あって、各段部27の段差は後ろ側から順に小、大、大、小、小となっている。
【0027】
また、潤滑槽20の上面開口は、トラフ24の底部23のうちの液切り孔が形成された領域全てをその内側に位置できるように、その大きさ、形状が設定されている。即ち、液切り孔を通して下側に滴下する潤滑剤が潤滑槽20に落下するようになっている。そして、トラフ24の左右一対の側壁にはそれぞれ、被支持部28が前後二カ所ずつ合計四箇所設けられ、これらの被支持部28でトラフ24は装置のフレーム29に吊下支持されている。尚、トラフ24は、各被支持部28において回動可能であり且つ、各々バネ30を介して上下方向に振動可能に支持されている。
【0028】
更に、該トラフ24は、図3に示すように、その下側所定領域が液体としての潤滑剤に漬かったワーク浸漬位置Aと、図1に示すように、潤滑剤上(液上)で浸漬後のワークWを前側へ払い出すワーク払い出し位置Bとの間を上下移動可能である。具体的には、トラフ24は、ワーク浸漬位置Aでは底部23のうちの後ろ側略1/3のみが潤滑剤に漬かり前側は潤滑剤に漬からないように前上がりに傾斜し且つ、ワーク払い出し位置Bでは略水平となる。
【0029】
即ち、トラフ24をワーク浸漬位置Aとワーク払い出し位置Bとに上下に移動させるトラフ駆動手段は、トラフ24の前側の被支持部28を支点としてトラフ24の後ろ側を上下に回動させることによってトラフ24をワーク浸漬位置Aとワーク払い出し位置Bとに移動させる。該トラフ駆動手段として、一定の間隔で昇降する昇降チェーン31を備えている。前側の被支持部28は、バネ30を介して直接フレーム29に支持され、その上下の位置は固定であって、トラフ24の回動支点をなす。一方、後ろ側の被支持部28には、フレーム29に装着された昇降チェーン31の先端がバネ30を介して連結されており、該昇降チェーン31が巻き上げられるとトラフ24はワーク浸漬位置Aからワーク払い出し位置Bに移動し、逆に昇降チェーン31が引き出されるとトラフ24はワーク払い出し位置Bからワーク浸漬位置Aに移動する。かかる昇降チェーン31は、上述したワーク投入装置1の投入用シュート15と連動するように駆動制御されている。昇降チェーン31が所定長さ引き出された後にエアシリンダ16が作動して投入用シュート15を降ろす。また、エアシリンダ16が投入用シュート15を上げた後に昇降チェーン31が所定長さ引き上げられる。
【0030】
尚、昇降チェーン31は、ワーク払い出し位置Bにおいて、トラフ24を略水平状態を中心にして上下に所定角度揺動させるように昇降する。即ち、トラフ駆動手段の昇降チェーン31が、トラフ24をその幅方向の軸線まわりに所定角度揺動させるトラフ揺動手段として構成されている。
【0031】
更に、トラフ24には振動機32が装着されており、該振動機32は、トラフ24の底部23後端部に積載された状態の浸漬後のワークWを振動によって前進させて前側から払い出すよう、トラフ24を所定方向に振動させる。この振動方向は、略水平状態のトラフ24を前側斜め上方と後ろ側斜め下方とに往復運動させる方向である。また、振動機32はトラフ24を常時、即ち、ワーク払い出し位置Bのみならず、ワーク浸漬位置Aにおいても、また、ワーク払い出し位置Bとワーク浸漬位置Aとの間の移動中においても、トラフ24を振動させる。尚、振動機32の周波数は自由に設定且つ変更可能であり、例えば、ワーク浸漬位置Aとワーク払い出し位置Bとで周波数を変えることができる。
このように、トラフ24と振動機32とからワーク液切り機構が構成され、昇降チェーン31がトラフ駆動手段とトラフ揺動手段の二つの機能を有している。
【0032】
次に、かかるワーク浸漬装置2の下流側に設置されたワーク乾燥装置3について説明する。該ワーク乾燥装置3は、潤滑剤が塗布されたワークWを乾燥させてその表面に潤滑剤の乾燥皮膜を形成する装置であり、ファン40が上下に設置された乾燥室41と、該乾燥室41を前後に貫通する略水平なコンベヤ42とを備えている。上下のファン40の駆動方向を制御することにより、乾燥室41内には上方向若しくは下方向に向けての気流が発生する。該上下方向に沿った気流を前後に横断するようにコンベヤ42が設置されている。コンベヤ42は、前記気流が上下に通過可能なように網目状の無端ベルト体から構成されたワイヤコンベヤで、ベルト体にワークWを載置して搬送する。このコンベヤ42の前後両端部42a,42bは乾燥室41から突出しており、トラフ24から払い出されたワークWはコンベヤ42の後端部42bに載置される。尚、図2のようにトラフ24に対してコンベヤ42は幅広であり、従って、トラフ24の前端部の平滑面26は、ワークWをコンベヤ42上に分散状態に払い出すことができるよう、コンベヤ42に向けて末広がりに形成されている。そして、コンベヤ42の後端部42bの上側にトラフ24の前端部の平滑面26が部分的に重なり合うように配置され、トラフ24の前側被支持部28もコンベヤ42の近傍位置に設けられている。尚、コンベヤ42の前端部42aには、斜め下側に向いたシュート43が設置され、このシュート43を介してワークWを排出する。
【0033】
以上のように構成されたバッチ式の冷間鍛造用潤滑処理装置の動作は以下の如きである。まず、二段切り出しリフター5によって略一定個数に切り分けられたワークWは、既に降ろされている投入用シュート15を介してワーク浸漬位置Aにおけるトラフ24内へと投入される。該ワークWは、底部23と後壁25との間に積載され、潤滑剤中に所定時間(30秒乃至70秒)浸漬される。該所定時間経過後、投入用シュート15が上がってリフター7も下降した後、昇降チェーン31が作動して略水平なワーク払い出し位置Bまでトラフ24を上側に回動させる。浸漬後のワークWは振動機32による振動で前進すると共に段部27を順に落下してその向きを変え、トラフ24の前端部の平滑面26からコンベヤ42上に分散される。その際、トラフ揺動手段としての昇降チェーン31がトラフ24を略水平状態を中心として上下に所定角度揺動させる。そして、ワークWがコンベヤ42上に全て払い出されると、昇降チェーン31が下降し、投入用シュート15が降りてリフター7が上昇動作を行うことにより、次の所定個数のワークWがトラフ24内に投入される。このような動作を順次繰り返す。
【0034】
以上の構成では、まず、潤滑剤中のトラフ24にワークWを投入するため、投入時にワークWがトラフ24に激しく衝突することが避けられ、ワークWの傷つきが抑制されるうえに、ワーク投入時における衝撃音も少ないという利点がある。また、浸漬中、トラフ24は振動機32によって振動させられているため、投入されたワークWは一カ所に固まらずに広がりやすいうえに、ワークWへの潤滑剤の液なじみもよい。また、ワークWは潤滑剤によって所定温度に加熱されることになるが、トラフ24を振動させることで潤滑剤も適度に攪拌され、ワークWを効率よく加熱でき、且つワークW間の加熱バラツキも少なくなる。このように、単にワークWに潤滑剤を塗布するのみならず、潤滑剤でワークWを所定温度に加熱することにより、その後のワーク乾燥装置3において素早く乾燥することができるのである。
【0035】
更に、ワーク払い出し位置Bへの上昇動作の際にもトラフ24は振動しているため、移動中にもワークWを振動によって液切りすることができる。しかも、トラフ24自体も液切りすることができる。このように、トラフ24を振動させているため、浸漬後直ちにワークWとトラフ24の液切りを開始することができる。また、底部23のみならず後壁25にも液切り孔が形成されているので、効率よく液切りを行うことができる。そして、略水平なワーク払い出し位置Bになると同時にワークWの山は前側へ崩れ、直ちに振動により前進を開始すると共に振動によって液切りも行われる。この時、トラフ24自体も振動で液切りされる。このようなトラフ24自体の液切りは、トラフ24への潤滑剤の付着量を減少させることができるという利点のみならず、トラフ24に付着した潤滑剤が逆にワークWに付着するという現象も抑制でき、ワークWを素早く確実に液切りするためには重要である。この意味において、本実施形態では、トラフ24の底部23のうち前側は潤滑剤に漬けないので、ワークWは潤滑剤が付着していない底部23の前側領域を通過して払い出されることになる。従って、払い出される直前にトラフ24からワークWに潤滑剤が付着するというおそれがなく、トラフ24の底部23全体を潤滑剤に漬ける構成に比してワークWの液切りがより一層確実になる。
【0036】
ところで、ワークWの形状は様々存在し、例えば、図5(イ)に示すような円筒状等の筒状のもの、図5(ロ)のようなコップ状のもの、図5(ハ)のような両端に凹部Pを有する棒状のもの、図5(ニ)のような一端に大径部Qを有しその大径部Qに凹部Pを有するものや、図5(ニ)に二点鎖線にて示すように凹部Pを有する大径部Qをその両端に有するもの、図5(ホ)のように凹部Pを有する星型板状のもの等、特に凹部P(貫通を含む)を有する形状も多い。このようにワークWが凹部Pを有している場合には、振動のみでは凹部Pの液切りが不十分になる可能性がある。しかしながら、底部23に段部27を設けているため、ワークWが段部27を落ちる際にワークWの向きが変わり、従って、凹部Pに溜まった潤滑剤の液切りを行うことができる。しかも、段差が大小二種類以上あるので、向きの変わり具合に変化をつけることができるうえに、ワークWの形状に対する汎用性も高まる。また、ワークWが星形板状や円盤状等の板状の場合にはワークWが上下に重なりやすいが、このように段部27を設けると、仮にワークWが上下に重なっていても段部27を通過する際に崩れて分離することにもなる。
【0037】
更に、ワーク払い出し位置Bにおいてトラフ24が上下に所定角度揺動するため、段部27と相まって確実にワークWがその向きを変え、より一層確実に液切りを行うことができる。この揺動によってトラフ24は若干前上がりに傾斜した状態となる瞬間があるが、段部27を設けているのでワークWの後方への逆流を効果的に防止できる。即ち、段部27がワークWの逆流防止用ストッパーとして機能する。
【0038】
尚、トラフ駆動手段としては昇降チェーン31以外にも種々の構成を採用でき、また、トラフ24を上下に回動させてワーク浸漬位置Aとワーク払い出し位置Bとに移動させたが、上下の平行移動を伴ってもよい。但し、トラフ24をその前側を支点として回動させる構成とすることにより、コンベヤ42をトラフ24の前端部下方まで接近配置することが可能となり、トラフ24とコンベヤ42との間に排出用シュートを別途配置する必要がなくなる。従って、冷間鍛造用潤滑処理装置の全長を短縮できる。
【0039】
また、ワーク浸漬位置Aのトラフ24に向けてワークWを投入するようにしているが、トラフ24が液上に位置しているときにそのトラフ24にワークWを投入しても無論よい。その場合には、ワーク投入位置をワーク浸漬位置Aやワーク払い出し位置Bとは別に設けることが必要になり、トラフ駆動手段及びその制御が複雑化するうえに上述したようなワーク投入時の衝撃音等の問題も起こりやすいので、ワーク浸漬位置AでワークWを投入することが好ましい。無論、ワーク投入装置1を使用せずに手動でワークWを投入してもよい。
【0040】
更に、トラフ駆動手段をトラフ揺動手段としても使用したが、ワーク払い出し位置Bにおいて略水平状態を中心にトラフ24をその幅方向の軸線まわりに所定角度揺動させるトラフ揺動手段を別途設けてもよい。その場合、回動支点も自由に設定してよい。
【0041】
尚、上記実施形態では、ワークWを所定個数入れて潤滑剤に浸漬するための容器としてのトラフ24にワーク液切り機構を設けたが、ワークWを入れる容器とは別にワーク液切り機構を設けることもできる。例えば、図4のように、湯槽21内に潤滑槽20を入れ、その潤滑槽20内の上流側に浸漬用の容器50を、潤滑槽20内の下流側にトラフ24を配置する。容器50は液上の回動支点51を中心にして上下に回動し、これによりワークWを浸漬するワーク浸漬位置Aと、ワークWをトラフ24に払い出すワーク払い出し位置Bとに移動する。一方、潤滑剤に浸漬されたワークWが容器50からその後端部所定位置に載置されるトラフ24と、ワークWが振動によって前進するようにトラフ24を振動させる振動機(図示省略)とからワーク液切り機構が構成される。トラフ24及び振動機の構成は上述したのと略同様であり、トラフ24の底部23には多数の液切り孔が設けられているが、トラフ24には後壁は設けられていない。そして、後端部に所定個数のワークWを一旦まとめて積載するために、トラフ24には、上下動作するストッパー52が設けられている。該ストッパー52が図のように下降位置にあるときに容器50からワークWが払い出され、ストッパー52の手前にワークWが積載される。その後、ストッパー52が上昇すると、振動機の振動によって、積載されたワークWの山が崩れて分散すると共にワークWの前進が開始され、ワークWは液切りされて前側に払い出される。このような動作を繰り返すことにより、順次ワークWを処理することができる。
【0042】
以上のように、ワーク液切り機構としての振動機付きトラフ24をワーク浸漬用の容器50と直列に潤滑槽20上に配置することもできる。この場合においても上述したのと同様に、底部23に設けた段部27によってワークWの向きを変えながら液切りすることができる。従って、特に凹部Pを有するワークWに効果的で、液切りを素早く確実に行うことができるのである。但し、図1乃至図3のように、ワーク浸漬用の容器にワーク液切り機構を設ける、あるいは、ワーク液切り機構を構成するトラフをワーク浸漬用の容器として使用することにより、装置が大幅に簡略化され且つ全長も大きく短縮できるという利点があるうえに、ワーク浸漬用の容器からワークWを移載する必要がなくなるためより一層素早く確実に液切りすることができる。また、図4に示したようなストッパー52も不要となる。
【0043】
尚、トラフ24の底部23は網目状に限られず底部23にスリット状の液切り孔を設けることもでき、何れにしても潤滑剤等の液体が通過できるように多数の液切り孔が形成されていればよい。
【0044】
また、トラフ24の底部23を、トラフ24の幅方向に沿って切断した断面が連続波状になるように、凹凸形成することも効果的である。丸棒状や円筒状のようにワークWの断面が略円状である場合、前後方向に沿った溝にワークWが沿って、ワークWの軸線が前後方向を向くことになる。従って、載置されたワークWが段部27で前後の向きを変えやすくなるという利点がある。また、ワークWの断面が矩形であれば、底部23に点接触するので、底部23がフラットである場合に比して段部27で向きを変えやすい。何れにしても、底部23を断面視波状に形成することで、より効果的に段部27でワークWの向きを変更できる。
【0045】
また、上記実施形態では、液体として潤滑剤を用いた場合について説明したが、潤滑剤に代えて水や酸等の他の液体に浸漬する場合も同様の効果が得られる。但し、冷間鍛造用潤滑剤、特に冷間鍛造用一工程潤滑剤の場合には、塗布後(浸漬後)の液切りを素早く且つ確実に行うことが均一膜厚を得るために極めて重要であり、その意味において本発明によって得られる効果も特に大きいものである。
【0046】
【発明の効果】
以上のように、本発明におけるワーク浸漬装置にあっては、ワークを入れるトラフを振動させて液切りするようにしたので、ワークをトラフから別のものに移載することなく浸漬後直ちに素早く確実に液切りすることができる。
【0047】
また、本発明におけるワーク液切り機構にあっては、底部の段部でワークの向きを変えることができるので、底部が平滑な場合に比してワークを素早く確実に液切りでき、特に凹部を有するワークに対し効果的である。
【図面の簡単な説明】
【図1】本発明の一実施形態におけるワーク液切り機構を備えたワーク浸漬装置の一部断面を含む正面図で、トラフがワーク払い出し位置にあるときを示す。
【図2】同装置の平面図。
【図3】同装置の一部断面を示す正面図で、トラフがワーク浸漬位置にあるときを示す。
【図4】他の実施形態におけるワーク液切り機構を備えたワーク浸漬装置を示す一部断面を含む正面図。
【図5】種々の形状のワークを示し、(イ)は円筒状のワークを示す断面図で、(ロ)はコップ状のワークを示す断面図で、(ハ)は両端に凹部を有するワークの断面図で、(ニ)は凹部付きの大径部を有するワークを示す断面図で、(ホ)は凹部を有する星形板状のワークを示す正面図である。
【符号の説明】
A…ワーク浸漬位置、B…ワーク払い出し位置、P…凹部、Q…大径部、W…ワーク、23…底部、24…トラフ、25…後壁、27…段部、31…昇降チェーン(トラフ駆動手段、トラフ揺動手段)、32…振動機
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a workpiece immersion apparatus that immerses a workpiece that is cold-forged by a press machine or the like in a liquid such as a lubricant, and a workpiece fluid draining mechanism that drains the immersed workpiece.
[0002]
[Prior art]
The work to be cold forged is immersed in various liquids before being conveyed to the press. For example, in general lubrication treatment for plastic working, the workpiece is immersed in various liquids such as water and lubricant, such as a degreasing step, a water washing step, a pickling step, a chemical conversion coating treatment step, and a lubricant coating step. In recent years, new cold forging lubrication methods and lubricants have also been developed. That is, it is a method of forming a dry film of a water-based dry lubricant for cold forging on a work by applying a lubricant to the work and drying it without performing a chemical conversion film treatment step. This lubricant is also referred to as a one-step lubricant for cold forging, and for example, there is a trade name “FineLube E700 series” manufactured by “Nihon Parkerizing Co., Ltd.”.
[0003]
[Problems to be solved by the invention]
By the way, when the work is immersed in a lubricant or the like, subsequent draining is important. If there is a pool of lubricant on the surface of the immersed workpiece, the film thickness will be non-uniform, and even when the liquid is water or acid, it is a quick solution after immersion from the viewpoint of minimizing the amount of liquid that is brought into the next process. Cutting may be required.
[0004]
On the other hand, unlike the in-line method in which workpieces are processed one by one, in the batch method in which a predetermined number of workpieces are collectively processed, it is necessary to uniformly drain a predetermined number of workpieces immersed at one time. Therefore, a method may be considered in which after a predetermined number of workpieces are placed in a container and immersed, the workpieces are collectively transferred from the container to another liquid draining station, and the liquid is drained there with, for example, an air nozzle.
[0005]
However, in the configuration for transferring the workpiece, not only does the apparatus become large and complicated, but there is a limit to quickly draining the liquid after immersion for transfer.
Furthermore, regarding the configuration of the liquid drainage, regardless of the inline type or the batch type, when the shape of the workpiece is complicated or there is a recessed part, it is not easy to drain the liquid at that part. For example, in a liquid draining configuration in which air is sprayed onto a work that has been transported by an air nozzle to remove the remaining liquid, it is not easy to drain liquid at locations where the air is difficult to hit because the direction of the work is constant.
[0006]
Therefore, an object of the present invention is to provide a workpiece immersion device and a workpiece fluid draining mechanism that can quickly and reliably drain the immersed workpiece.
[0007]
[Means for Solving the Problems]
The present invention has been made to solve the above-mentioned problems, and the workpiece immersion apparatus according to the present invention is a workpiece immersion apparatus in which a predetermined number of workpieces for cold forging are placed in a container and immersed in a liquid such as a lubricant. A trough as a container having a plurality of liquid cutting holes at the bottom and closed at the rear side by a rear wall, and a workpiece immersion position and a liquid above the trough as a predetermined region below the trough. A trough drive means that moves the immersed workpiece up and down to the workpiece dispensing position for delivering the workpiece to the front side, and a vibrator that vibrates the trough to advance the workpiece by vibration at the workpiece dispensing position and dispense it to the front side. It is characterized by.
As a method for putting a predetermined number of workpieces into the container, there is a method of putting the workpiece into a container in which the lower predetermined region is immersed in the liquid in addition to the method of putting the workpiece on the liquid.
[0008]
In particular, it is preferable that the trough is inclined upward so that only the rear side of the bottom is immersed in the liquid at the workpiece immersion position and is substantially horizontal at the workpiece discharge position. In this case, the workpiece passes through the front area of the bottom that is not immersed in the liquid, and the lubricant can be prevented from adhering to the workpiece from the front area of the trough before being dispensed.
[0009]
In that case, it is preferable in terms of simplification of the trough driving means that the trough driving means moves the trough to the workpiece immersion position and the workpiece discharge position by rotating the trough rear side up and down with the front side of the trough as a fulcrum. .
[0010]
Further, it is preferable that a large number of liquid drain holes are formed in the rear wall of the trough.
[0011]
In addition, it is preferable that the vibrator vibrate the trough even at the workpiece immersion position from the viewpoints of liquid familiarity with the workpiece, suppression of impact sound and workpiece damage when the workpiece is charged, and liquid stirring effect.
[0012]
Moreover, it is preferable that the bottom part of the trough is provided with a step part whose front side is lower than the rear side, and the direction of the work can be changed at the step part, and the effect is particularly great for a work having a recess. .
[0013]
In that case, it is preferable that a plurality of step portions are provided at intervals, and that there are two or more steps in the step portions. By providing two or more types of stepped portions, an effect can be obtained for a larger number of workpiece shapes, and the direction of the workpiece can be changed.
[0014]
Furthermore, it is preferable to provide trough rocking means for rocking the trough at a predetermined angle around the axis in the width direction around the substantially horizontal state at the workpiece discharge position. As the trough swings up and down, the orientation of the workpiece is more easily changed at the stepped portion.
[0015]
In addition, the workpiece draining mechanism according to the present invention includes a trough on which a workpiece for cold forging immersed in a liquid such as a lubricant is placed and which has a number of fluid draining holes at the bottom, and the workpiece advances by vibration. And a vibrator that vibrates the trough, and the bottom portion of the trough is provided with a step portion whose front side is lower than the rear side.
[0016]
In particular, it is preferable to provide trough rocking means for rocking the trough by a predetermined angle around the axis in the width direction. Moreover, it is preferable that a plurality of step portions are provided at intervals, and that there are two or more types of step portions.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a workpiece liquid draining mechanism and a workpiece immersion apparatus including the mechanism according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.
FIGS. 1 to 3 show a batch type cold forging lubrication apparatus that collectively lubricates a predetermined number of workpieces for cold forging. The lubricating treatment apparatus applies a cold forging lubricant to a workpiece and performs drying without forming a chemical conversion coating treatment step, thereby forming a dry coating of the lubricant on the workpiece surface. As the lubricant, the above-mentioned one-step lubricant for cold forging is used. Such a lubrication processing apparatus includes a workpiece input device 1, a workpiece immersion device 2, and a workpiece drying device 3 in order from the upstream side.
[0018]
The workpiece loading device 1 stores a large amount of workpieces W in a hopper 4 that is substantially V-shaped in cross section, and cuts out a substantially constant amount (substantially a constant number) of workpieces W from the hopper 4 into a workpiece immersion device 2. throw into. As a means for cutting out a substantially constant amount of workpiece W, the workpiece loading device 1 includes a two-stage cutting lifter 5. The two-stage cut-out lifter 5 includes a lifter 7 guided by an inclined guide 6 having a constant thickness and capable of moving up and down obliquely, and a lifter drive chain 8 as an elevating means for moving the lifter 7 up and down. The lifter drive chain 8 is driven in the front-rear two directions by a motor 9, and the lifter 7 is fixed to the chain 8 by a connecting portion 10.
[0019]
The lifter 7 has a first lift portion 11 located on the front side (upstream side) of the tilt guide 6 and a second lift portion 12 located on the back side (downstream side) of the tilt guide 6. Both lift portions 11 and 12 are connected to each other at the lower position of the inclined guide 6, and the lifter 7 is formed in a substantially U shape in sectional view opened obliquely upward as shown in FIG. 1. . That is, the lifter 7 is configured such that the inclined guide 6 is sandwiched between the lift portions 11 and 12, and the lift portions 11 and 12 both push the work W on the front end surfaces 11 a and 12 a. The first lift part 11 is shorter than the second lift part 12, and the front end surface 11a thereof is substantially flush with the rear wall 13 of the hopper 4 at the lowered position shown by the solid line in FIG. At the raised position indicated by the chain line, the upper end surface 6a of the inclined guide 6 is substantially flush with the upper end surface 6a. The front end surface 12a of the second lift portion 12 is substantially flush with the upper end surface 6a of the inclined guide 6 at the lowered position indicated by the solid line in the drawing, and the hopper at the raised position indicated by the two-dot chain line in the drawing. 4 is substantially flush with the upper end 14 a of the front wall 14.
[0020]
Therefore, when the motor 9 rotates forward to raise the lifter 7, a part of the workpiece W collected between the inclined guide 6 and the rear wall 13 of the hopper 4 is separated by the first lift portion 11. And is pushed up to the upper end surface 6a of the inclined guide 6 and loaded between the upper end surface 6a of the inclined guide 6 and the surface of the second lift portion 12 at the raised position. When the motor 9 rotates in the reverse direction and the lifter 7 descends and the second lift part 12 reaches the lowered position, a part of the workpiece W loaded on the upper end surface 6a of the inclined guide 6 becomes the tip of the second lift part 12. Slide down to the surface 12a. Thereafter, when the lifter 7 is raised again, a part of the workpiece W is separated by the second lift portion 12 and pushed up to the upper end portion 14a of the front wall 14 of the hopper 4, and the upper end portion 14a of the front wall 14 is pushed up. The work is immersed in the work dipping device 2 through a charging chute 15 provided on the workpiece.
[0021]
Here, the throwing chute 15 is rotatably supported at the base end portion by the upper end portion 14a of the front wall 14, and is rotated up and down by a predetermined angle about the base end portion as a fulcrum by driving means such as an air cylinder 16. It is configured as follows.
[0022]
Thus, by adopting the two-stage cut-out lifter 5, it is possible to suppress the variation in the amount of the workpiece W to be put into the workpiece immersion apparatus 2.
[0023]
Next, the workpiece | work immersion apparatus 2 is demonstrated. The workpiece immersion apparatus 2 in the present embodiment is configured as a batch type lubricant application apparatus that collectively immerses a predetermined number of workpieces W in a lubricant. A lubricant is stored in a liquid tank in which a predetermined amount of liquid is stored, and the liquid tank is configured as a lubricating tank 20. Moreover, the workpiece | work immersion apparatus 2 in this embodiment puts a predetermined number of workpiece | work W in a container, and immerses it in a lubricant, The workpiece | work liquid which removes the excess lubricant adhering to the workpiece | work W after immersion in this container. A cutting mechanism is provided. Details will be described below.
[0024]
A lubrication tank 20 is installed between the workpiece drying device 3 and the workpiece loading device 1. The lubricant (lubricating liquid) in the lubricating tank 20 is set in a range of 50 ° C. to 70 ° C., for example. In order to heat and maintain such a lubricant at a predetermined temperature, the lubricating bath 20 is installed in a hot water bath 21 and warmed. Hot water maintained at a predetermined temperature is stored in the hot water tank 21. The hot water tank 21 is installed on the carriage 22 and is movable.
[0025]
Above the lubrication tank 20, as a container, a trough 24 having a substantially U-shaped cross-sectional view opened upward so that a predetermined number of works W can be loaded on the bottom 23, and the front side faces the work drying device 3. The rear side is suspended and supported so as to face the feeding chute 15 of the workpiece loading device 1. The trough 24 is configured such that the rear side is closed by the rear wall 25 and the workpiece W after immersion is discharged from the front side, and a plurality of round hole-shaped liquid drain holes are formed in the bottom portion 23. . The rear wall 25 is formed upward from the rear end of the bottom portion 23 so as to be substantially perpendicular to the bottom portion 23, and a number of round hole-like liquid cut holes are formed in the rear wall 25 as well. . That is, most of the bottom 23 and the rear wall 25 are both formed in a mesh shape. In addition, the front end part predetermined length area | region of the bottom part 23 is the smooth surface 26 in which the liquid cutting hole is not provided. As will be described later, the trough 24 takes a substantially horizontal state and an inclined state inclined forwardly upward. In the substantially horizontal state shown in FIG. 1, the smooth surface 26 is slightly lowered to the front side.
[0026]
Furthermore, a stepped portion 27 is formed in the bottom portion 23 along the width direction so that the front side is lower than the rear side. A plurality of the step portions 27 are provided at intervals in the front-rear direction, whereby the bottom portion 23 is formed in a stepped shape that descends toward the front side. In addition, in the substantially horizontal state shown in FIG. 1, the area | region between each step part 27 is a horizontal surface. Further, there are two types of steps in the stepped portion 27. The steps in each stepped portion 27 are small, large, large, small and small in order from the rear side.
[0027]
Further, the size and shape of the upper surface opening of the lubricating tank 20 are set so that the entire region of the bottom portion 23 of the trough 24 where the liquid drain hole is formed can be located inside. That is, the lubricant dripping downward through the liquid draining hole is dropped into the lubricating tank 20. A pair of left and right side walls of the trough 24 are each provided with four supported portions 28 in total, two at the front and rear, and the trough 24 is suspended and supported by the frame 29 of the apparatus. In addition, the trough 24 is supported by each supported part 28 so that it can rotate and can vibrate in the vertical direction via a spring 30.
[0028]
Further, as shown in FIG. 3, the trough 24 is immersed in a workpiece immersion position A in which a predetermined region below is immersed in a lubricant as a liquid, and on the lubricant (on the liquid) as shown in FIG. It is possible to move up and down between the workpiece delivery position B for delivering the subsequent workpiece W to the front side. Specifically, at the workpiece immersion position A, the trough 24 is inclined upward so that only about 1/3 of the back 23 of the bottom 23 is immersed in the lubricant and the front side is not immersed in the lubricant, and the workpiece is discharged. At position B, it is substantially horizontal.
[0029]
That is, the trough driving means for moving the trough 24 up and down to the workpiece immersion position A and the workpiece dispensing position B is obtained by rotating the rear side of the trough 24 up and down with the supported portion 28 on the front side of the trough 24 as a fulcrum. The trough 24 is moved to the workpiece immersion position A and the workpiece dispensing position B. As the trough driving means, an elevating chain 31 that moves up and down at regular intervals is provided. The supported portion 28 on the front side is directly supported by the frame 29 via the spring 30, and the upper and lower positions thereof are fixed and serve as a pivot for the trough 24. On the other hand, the tip of an elevating chain 31 attached to the frame 29 is connected to the supported portion 28 on the rear side via a spring 30. When the elevating chain 31 is wound up, the trough 24 is moved from the workpiece immersion position A. The trough 24 moves from the workpiece dispensing position B to the workpiece immersion position A when it moves to the workpiece dispensing position B and, conversely, when the lifting chain 31 is pulled out. The elevating chain 31 is driven and controlled so as to interlock with the loading chute 15 of the workpiece loading device 1 described above. After the elevating chain 31 is pulled out by a predetermined length, the air cylinder 16 is operated to lower the closing chute 15. Further, after the air cylinder 16 raises the charging chute 15, the elevating chain 31 is pulled up by a predetermined length.
[0030]
The lifting chain 31 is lifted and lowered at the workpiece dispensing position B so that the trough 24 is swung up and down by a predetermined angle around the substantially horizontal state. That is, the raising / lowering chain 31 of the trough driving means is configured as trough swinging means for swinging the trough 24 by a predetermined angle around the widthwise axis.
[0031]
Further, a vibrator 32 is attached to the trough 24, and the vibrator 32 advances the immersed work W in a state of being loaded on the rear end portion of the bottom 23 of the trough 24 by vibration and pays it out from the front side. The trough 24 is vibrated in a predetermined direction. This vibration direction is a direction in which the trough 24 in a substantially horizontal state is reciprocated obliquely upward and downward on the front side. In addition, the vibrator 32 always keeps the trough 24, that is, not only at the workpiece dispensing position B but also at the workpiece immersion position A, and during movement between the workpiece dispensing position B and the workpiece immersion position A. Vibrate. The frequency of the vibrator 32 can be freely set and changed. For example, the frequency can be changed between the workpiece immersion position A and the workpiece dispensing position B.
Thus, the trough 24 and the vibrator 32 constitute a work fluid draining mechanism, and the lifting chain 31 has two functions of trough driving means and trough swinging means.
[0032]
Next, the workpiece drying apparatus 3 installed on the downstream side of the workpiece immersion apparatus 2 will be described. The work drying device 3 is a device for drying a work W coated with a lubricant to form a dry film of the lubricant on the surface thereof, a drying chamber 41 in which a fan 40 is installed up and down, and the drying chamber. 41 and a substantially horizontal conveyor 42 penetrating front and rear. By controlling the driving direction of the upper and lower fans 40, an air flow is generated in the drying chamber 41 upward or downward. A conveyor 42 is installed so as to cross the airflow along the vertical direction back and forth. The conveyor 42 is a wire conveyor composed of a mesh-like endless belt body so that the airflow can pass up and down, and the work W is placed on the belt body and conveyed. The front and rear end portions 42 a and 42 b of the conveyor 42 protrude from the drying chamber 41, and the workpiece W discharged from the trough 24 is placed on the rear end portion 42 b of the conveyor 42. As shown in FIG. 2, the conveyor 42 is wider than the trough 24. Therefore, the smooth surface 26 at the front end of the trough 24 allows the workpiece W to be distributed on the conveyor 42 in a dispersed state. It is formed to spread toward the end 42. And the smooth surface 26 of the front-end part of the trough 24 is arrange | positioned so that it may overlap with the upper side of the rear-end part 42b of the conveyor 42, and the front side supported part 28 of the trough 24 is also provided in the vicinity of the conveyor 42. . A chute 43 directed obliquely downward is installed at the front end 42 a of the conveyor 42, and the workpiece W is discharged through the chute 43.
[0033]
The operation of the batch type cold forging lubrication apparatus configured as described above is as follows. First, the workpiece W cut into a substantially constant number by the two-stage cutting lifter 5 is thrown into the trough 24 at the workpiece immersion position A through the dropping chute 15 that has already been lowered. The workpiece W is loaded between the bottom 23 and the rear wall 25 and immersed in the lubricant for a predetermined time (30 seconds to 70 seconds). After the predetermined time has elapsed, after the throwing chute 15 is raised and the lifter 7 is also lowered, the elevating chain 31 is operated to rotate the trough 24 upward to a substantially horizontal workpiece dispensing position B. The workpiece W after immersion advances by vibrations from the vibrator 32 and falls in order on the stepped portion 27 and changes its direction, and is distributed on the conveyor 42 from the smooth surface 26 at the front end portion of the trough 24. At that time, the elevating chain 31 as the trough swinging means swings the trough 24 up and down by a predetermined angle around the substantially horizontal state. When all the workpieces W are paid out on the conveyor 42, the elevating chain 31 descends, the throwing chute 15 descends, and the lifter 7 moves up, so that the next predetermined number of workpieces W are placed in the trough 24. It is thrown. Such an operation is sequentially repeated.
[0034]
In the above configuration, since the workpiece W is first thrown into the trough 24 in the lubricant, it is possible to avoid the workpiece W from colliding with the trough 24 at the time of loading, and to prevent the workpiece W from being damaged. There is an advantage that there is little impact sound at the time. In addition, since the trough 24 is vibrated by the vibrator 32 during immersion, the thrown workpiece W is not spread in one place and is easy to spread, and the workpiece W may be familiar with the lubricant. In addition, the workpiece W is heated to a predetermined temperature by the lubricant, but by vibrating the trough 24, the lubricant is also appropriately stirred, the workpiece W can be heated efficiently, and the heating variation between the workpieces W is also increased. Less. Thus, not only the lubricant is simply applied to the workpiece W but also the workpiece W can be quickly dried in the subsequent workpiece drying apparatus 3 by heating the workpiece W to a predetermined temperature with the lubricant.
[0035]
Furthermore, since the trough 24 vibrates during the ascending operation to the workpiece dispensing position B, the workpiece W can be drained by vibration during movement. Moreover, the trough 24 itself can be drained. Thus, since the trough 24 is vibrated, the drainage of the workpiece W and the trough 24 can be started immediately after immersion. Moreover, since the liquid draining hole is formed not only in the bottom 23 but also in the rear wall 25, the liquid draining can be performed efficiently. At the same time as the workpiece discharge position B is reached, the crest of the workpiece W collapses to the front side, immediately starts moving forward by vibration and also drains liquid by vibration. At this time, the trough 24 itself is also drained by vibration. Such draining of the trough 24 itself not only has the advantage that the amount of lubricant adhering to the trough 24 can be reduced, but also the phenomenon that the lubricant adhering to the trough 24 adheres to the workpiece W conversely. This is important for quickly and surely draining the workpiece W. In this sense, in the present embodiment, the front side of the bottom portion 23 of the trough 24 cannot be immersed in the lubricant, so that the work W passes through the front region of the bottom portion 23 where the lubricant is not attached and is paid out. Therefore, there is no possibility that the lubricant adheres to the workpiece W from the trough 24 immediately before the payout, and the drainage of the workpiece W is further ensured as compared with the configuration in which the entire bottom 23 of the trough 24 is immersed in the lubricant.
[0036]
By the way, there are various shapes of the workpiece W, for example, a cylindrical shape such as a cylindrical shape as shown in FIG. 5 (a), a cup-shaped shape as shown in FIG. Such rod-shaped ones having recesses P at both ends, one having a large-diameter portion Q at one end as shown in FIG. 5 (D), and having a recess P at the large-diameter portion Q, and two points in FIG. 5 (D). As shown by a chain line, a portion having a large-diameter portion Q having a recess P at both ends, a star-shaped plate having a recess P as shown in FIG. There are many shapes. Thus, when the workpiece | work W has the recessed part P, the liquid drainage of the recessed part P may become inadequate only by a vibration. However, since the stepped portion 27 is provided on the bottom portion 23, the direction of the workpiece W changes when the workpiece W falls on the stepped portion 27, so that the lubricant accumulated in the recess P can be drained. In addition, since there are two or more types of steps, the change in direction can be changed, and versatility with respect to the shape of the workpiece W is enhanced. In addition, when the workpiece W is a plate shape such as a star plate shape or a disk shape, the workpiece W is likely to overlap vertically. However, if the step portion 27 is provided in this way, even if the workpiece W is overlapped vertically, the workpiece W is overlapped. When passing through the section 27, it will be broken and separated.
[0037]
Furthermore, since the trough 24 swings up and down by a predetermined angle at the workpiece discharge position B, the workpiece W can be surely changed its direction in combination with the stepped portion 27, and the liquid can be drained more reliably. Although there is a moment when the trough 24 is tilted slightly upward by this swinging, the stepped portion 27 is provided, so that the backward flow of the workpiece W can be effectively prevented. That is, the stepped portion 27 functions as a stopper for preventing the work W from flowing backward.
[0038]
In addition to the elevating chain 31, various configurations can be adopted as the trough driving means, and the trough 24 is moved up and down to move between the workpiece immersion position A and the workpiece dispensing position B. It may be accompanied by movement. However, by adopting a configuration in which the trough 24 is rotated with its front side as a fulcrum, the conveyor 42 can be disposed close to the lower end of the front end of the trough 24, and a discharge chute is disposed between the trough 24 and the conveyor 42. There is no need to place it separately. Therefore, the total length of the cold forging lubrication apparatus can be shortened.
[0039]
Although the workpiece W is thrown toward the trough 24 at the workpiece immersion position A, it is of course possible to throw the workpiece W into the trough 24 when the trough 24 is positioned on the liquid. In that case, it is necessary to provide the workpiece loading position separately from the workpiece immersion position A and workpiece dispensing position B, and the trough driving means and its control become complicated, and the impact noise at the time of workpiece loading as described above is required. Therefore, it is preferable to throw the workpiece W at the workpiece immersion position A. Of course, the workpiece W may be manually input without using the workpiece input device 1.
[0040]
Further, although the trough driving means is also used as the trough swinging means, the trough swinging means for swinging the trough 24 by a predetermined angle around the axis in the width direction around the substantially horizontal state at the workpiece discharge position B is separately provided. Also good. In that case, the rotation fulcrum may be set freely.
[0041]
In the above embodiment, the work liquid draining mechanism is provided in the trough 24 as a container for putting a predetermined number of workpieces W and immersing them in the lubricant. However, the workpiece liquid draining mechanism is provided separately from the container in which the workpiece W is placed. You can also. For example, as shown in FIG. 4, the lubricating tank 20 is placed in the hot water tank 21, and the immersion container 50 is disposed upstream of the lubricating tank 20, and the trough 24 is disposed downstream of the lubricating tank 20. The container 50 is pivoted up and down around a pivot point 51 on the liquid, thereby moving to a workpiece immersion position A where the workpiece W is immersed and a workpiece dispensing position B where the workpiece W is dispensed to the trough 24. On the other hand, from the trough 24 on which the work W immersed in the lubricant is placed from the container 50 at a predetermined position at the rear end thereof, and a vibrator (not shown) that vibrates the trough 24 so that the work W moves forward by vibration. Work fluid draining mechanism is configured. The configurations of the trough 24 and the vibrator are substantially the same as described above, and a number of liquid drain holes are provided in the bottom 23 of the trough 24, but the rear wall is not provided in the trough 24. The trough 24 is provided with a stopper 52 that moves up and down in order to once load a predetermined number of workpieces W on the rear end. When the stopper 52 is in the lowered position as shown in the figure, the workpiece W is paid out from the container 50, and the workpiece W is loaded in front of the stopper 52. Thereafter, when the stopper 52 is raised, the piles of the loaded workpiece W are broken and dispersed by the vibration of the vibrator, and the workpiece W starts to move forward. The workpiece W is drained and discharged to the front side. By repeating such an operation, the workpieces W can be sequentially processed.
[0042]
As described above, the vibrator-equipped trough 24 as the workpiece liquid draining mechanism can be arranged on the lubricating tank 20 in series with the workpiece immersion container 50. Also in this case, the liquid can be drained while changing the direction of the workpiece W by the stepped portion 27 provided on the bottom portion 23 as described above. Therefore, it is particularly effective for the workpiece W having the concave portion P, and the liquid draining can be performed quickly and reliably. However, as shown in FIG. 1 to FIG. 3, the apparatus can be drastically improved by providing the workpiece immersion mechanism in the workpiece immersion container or using the trough constituting the workpiece immersion mechanism as the workpiece immersion container. In addition to the advantages of being simplified and greatly shortening the overall length, it is not necessary to transfer the workpiece W from the workpiece immersion container, so that the liquid can be drained more quickly and reliably. Further, the stopper 52 as shown in FIG. 4 is not necessary.
[0043]
Note that the bottom 23 of the trough 24 is not limited to a mesh shape, and a slit-like liquid cut hole can be provided in the bottom 23. In any case, a large number of liquid cut holes are formed so that a liquid such as a lubricant can pass through. It only has to be.
[0044]
It is also effective to form irregularities in the bottom 23 of the trough 24 so that the cross section cut along the width direction of the trough 24 has a continuous wave shape. When the cross section of the workpiece W is substantially circular, such as a round bar shape or a cylindrical shape, the workpiece W extends along a groove along the front-rear direction, and the axis of the work W faces the front-rear direction. Therefore, there is an advantage that the placed workpiece W can easily change the front and rear direction at the stepped portion 27. Further, if the cross section of the workpiece W is rectangular, point contact is made with the bottom 23, so that the direction of the step 27 can be easily changed as compared with the case where the bottom 23 is flat. In any case, the direction of the workpiece W can be changed by the stepped portion 27 more effectively by forming the bottom portion 23 in a cross-sectional view wave shape.
[0045]
Moreover, although the case where the lubricant was used as the liquid has been described in the above-described embodiment, the same effect can be obtained when the liquid is immersed in another liquid such as water or acid instead of the lubricant. However, in the case of cold forging lubricants, especially cold forging one-step lubricants, it is extremely important to quickly and surely drain the liquid after application (after immersion) in order to obtain a uniform film thickness. In that sense, the effect obtained by the present invention is particularly great.
[0046]
【The invention's effect】
As described above, in the workpiece immersion apparatus according to the present invention, the trough for inserting the workpiece is vibrated to drain the liquid, so that the workpiece can be quickly and reliably immediately after immersion without being transferred from the trough to another. Can be drained.
[0047]
Further, in the workpiece liquid draining mechanism according to the present invention, the direction of the workpiece can be changed at the bottom stepped portion, so that the workpiece can be drained quickly and reliably as compared with the case where the bottom is smooth, and in particular, the concave portion is formed. It is effective for the workpiece that you have.
[Brief description of the drawings]
FIG. 1 is a front view including a partial cross section of a workpiece immersion apparatus provided with a workpiece fluid draining mechanism according to an embodiment of the present invention, showing a trough in a workpiece dispensing position.
FIG. 2 is a plan view of the apparatus.
FIG. 3 is a front view showing a partial cross section of the apparatus, showing the trough in a workpiece immersion position.
FIG. 4 is a front view including a partial cross section showing a workpiece immersion apparatus including a workpiece fluid draining mechanism according to another embodiment.
5A and 5B are cross-sectional views showing a cylindrical work, FIG. 5B is a cross-sectional view showing a cup-shaped work, and FIG. 5C is a work having recesses at both ends. (D) is a cross-sectional view showing a workpiece having a large-diameter portion with a recess, and (e) is a front view showing a star-shaped plate-like workpiece having a recess.
[Explanation of symbols]
A ... Work immersion position, B ... Work discharge position, P ... Recess, Q ... Large diameter part, W ... Work, 23 ... Bottom, 24 ... Trough, 25 ... Rear wall, 27 ... Step part, 31 ... Lifting chain (Trough Drive means, trough swing means), 32... Vibrator

Claims (13)

冷間鍛造用のワーク(W)を容器に所定個数入れて潤滑剤等の液体に浸漬するワーク浸漬装置であって、底部(23)に多数の液切り孔を有し且つ後ろ側が後壁(25)で塞がれた前記容器としてのトラフ(24)と、該トラフ(24)をその下側所定領域が液体に漬かったワーク浸漬位置(A)と液上で浸漬後のワーク(W)を前側へ払い出すワーク払い出し位置(B)とに上下に移動させるトラフ駆動手段(31)と、ワーク払い出し位置(B)においてワーク(W)を振動によって前進させて前側へ払い出すべくトラフ(24)を振動させる振動機(32)とを備えたことを特徴とするワーク浸漬装置。A workpiece dipping device for dipping a predetermined number of workpieces (W) for cold forging into a container and immersing them in a liquid such as a lubricant, having a plurality of drain holes in the bottom (23) and a rear wall on the back side ( 25) The trough (24) as the container closed in 25), the workpiece immersion position (A) in which the trough (24) is immersed in a liquid in a predetermined region below the workpiece, and the workpiece (W) after being immersed in the liquid The trough driving means (31) for moving the workpiece (W) up and down to the workpiece dispensing position (B), and the trough (24) for advancing the workpiece (W) by vibration at the workpiece dispensing position (B) and delivering it to the front side. And a vibrator (32) for vibrating the workpiece. トラフ(24)は、ワーク浸漬位置(A)では底部(23)のうち後ろ側のみ液体に漬かるように前上がりに傾斜し且つ、ワーク払い出し位置(B)では略水平となる請求項1記載のワーク浸漬装置。The trough (24) inclines upward so that only the rear side of the bottom (23) is immersed in the liquid at the workpiece immersion position (A) and is substantially horizontal at the workpiece dispensing position (B). Work immersion equipment. トラフ駆動手段(31)は、トラフ(24)の前側を支点としてトラフ(24)の後ろ側を上下に回動させてトラフ(24)をワーク浸漬位置(A)とワーク払い出し位置(B)とに移動させる請求項2記載のワーク浸漬装置。The trough drive means (31) rotates the rear side of the trough (24) up and down with the front side of the trough (24) as a fulcrum, so that the trough (24) is moved to the workpiece immersion position (A) and the workpiece dispensing position (B). The workpiece immersion apparatus according to claim 2, wherein the workpiece immersion apparatus is moved. トラフ(24)の後壁(25)に多数の液切り孔が形成されている請求項2又は3に記載ワーク浸漬装置。The work dipping device according to claim 2 or 3, wherein a number of liquid drain holes are formed in the rear wall (25) of the trough (24). 振動機(32)はトラフ(24)をワーク浸漬位置(A)においても振動させる請求項1乃至4の何れかに記載のワーク浸漬装置。The workpiece immersion device according to any one of claims 1 to 4, wherein the vibrator (32) vibrates the trough (24) also at the workpiece immersion position (A). トラフ(24)の底部(23)には、後ろ側より前側が低くなる段部(27)が設けられている請求項1乃至5の何れかに記載のワーク浸漬装置。The workpiece dipping device according to any one of claims 1 to 5, wherein a step (27) having a front side lower than a rear side is provided at a bottom (23) of the trough (24). 段部(27)が間隔をおいて複数設けられ、且つ、段部(27)の段差は二種類以上ある請求項6記載のワーク浸漬装置。The workpiece dipping device according to claim 6, wherein a plurality of stepped portions (27) are provided at intervals, and there are two or more types of stepped portions (27). ワーク払い出し位置(B)において略水平状態を中心にトラフ(24)をその幅方向の軸線まわりに所定角度揺動させるトラフ揺動手段(31)を備える請求項6又は7記載のワーク浸漬装置。The work dipping device according to claim 6 or 7, further comprising trough rocking means (31) for rocking the trough (24) by a predetermined angle around an axis in the width direction about the substantially horizontal state at the work paying position (B). トラフ(24)の底部(23)は、トラフ(24)の幅方向にThe bottom (23) of the trough (24) extends in the width direction of the trough (24). 沿って切断した断面が連続波状である請求項1乃至8の何れかに記載のワーク浸漬装置。The work immersion apparatus according to any one of claims 1 to 8, wherein a cross section cut along the line has a continuous wave shape. 潤滑剤等の液体に浸漬された冷間鍛造用のワーク(W)が載置され且つ底部(23)に多数の液切り孔を有するトラフ(24)と、ワーク(W)が振動によって前進するようにトラフ(24)を振動させる振動機(32)とを備え、トラフ(24)の底部(23)には、後ろ側より前側が低くなる段部(27)が設けられていることを特徴とするワーク液切り機構。A trough (24) on which a work (W) for cold forging immersed in a liquid such as a lubricant is placed and which has a number of liquid drain holes in the bottom (23), and the work (W) are advanced by vibration. And a vibrator (32) that vibrates the trough (24), and the bottom (23) of the trough (24) is provided with a step portion (27) whose front side is lower than the rear side. Work fluid draining mechanism. トラフ(24)をその幅方向の軸線まわりに所定角度揺動させるトラフ揺動手段(31)を備える請求項10記載のワーク液切り機構。The work fluid draining mechanism according to claim 10, further comprising trough rocking means (31) for rocking the trough (24) by a predetermined angle around an axis in the width direction. 段部(27)が間隔をおいて複数設けられ、且つ、段部(27)の段差は二種類以上ある請求項10又は11記載のワーク液切り機構。The workpiece fluid draining mechanism according to claim 10 or 11 , wherein a plurality of stepped portions (27) are provided at intervals, and there are two or more types of stepped portions (27). トラフ(24)の底部(23)は、トラフ(24)の幅方向に沿って切断した断面が連続波状である請求項10乃至12の何れかに記載のワーク液切り機構。The work fluid draining mechanism according to any one of claims 10 to 12, wherein the bottom portion (23) of the trough (24) has a continuous wave cross section cut along the width direction of the trough (24).
JP2001141628A 2001-05-11 2001-05-11 Work immersion device and work fluid draining mechanism Expired - Fee Related JP3663148B2 (en)

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