JPH0729165B2 - 冷間押出成形によつて金属からなる成形体を製造する方法 - Google Patents

冷間押出成形によつて金属からなる成形体を製造する方法

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Publication number
JPH0729165B2
JPH0729165B2 JP1031260A JP3126089A JPH0729165B2 JP H0729165 B2 JPH0729165 B2 JP H0729165B2 JP 1031260 A JP1031260 A JP 1031260A JP 3126089 A JP3126089 A JP 3126089A JP H0729165 B2 JPH0729165 B2 JP H0729165B2
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Prior art keywords
metal
plunger
metal billet
polytetrafluoroethylene
billet
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Expired - Lifetime
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JP1031260A
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English (en)
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JPH01258837A (ja
Inventor
ハンス―ヨアヒム・テユスハウス
ミヒヤエル・ヘルマン
Original Assignee
ヴエー・ツエー・ヘレーウス・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング
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Publication of JPH01258837A publication Critical patent/JPH01258837A/ja
Publication of JPH0729165B2 publication Critical patent/JPH0729165B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/38—Lubricating compositions characterised by the base-material being a macromolecular compound containing halogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
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    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
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    • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
    • C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F2003/026—Mold wall lubrication or article surface lubrication
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  • Oil, Petroleum & Natural Gas (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Forging (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Lubricants (AREA)
  • Extrusion Of Metal (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Powder Metallurgy (AREA)

Description

【発明の詳細な説明】 産業上の利用分野 本発明はタンタル、ニオブの群の１つの金属およびこれ
ら金属の１つのベースとする合金からなる成形体を潤滑
剤としてフッ素含有プラスチックを使用して冷間押出成
形によって製造する方法に関する。
従来の技術： 雑誌“Umfoumtechnik 15（1980）3,31ページ以下”から
タンタルの冷間押出成形が公知であり。その利点は材料
損失が小さいことである。成形は縦形クランクプレスの
４工程で行われる。タンタルは鋼に比して冷間押出成形
の際作用する高い表面圧力のもとに溶着する傾向があ
る。通常のCr−冷間加工鋼を使用する際、被加工材のPT
FE被膜を含む試験した潤滑剤のいずれによっても満足な
結果は達成されなかった。十分な結果は多数の手段の組
合せによってしか達成されず、これには能動部分のため
の他の材料の使用、その付加的表面処理、出発型の表面
処理およびその潤滑剤混合物による潤滑が含まれる。こ
れに対し個々にいかなる出発をとったかは詳細には記載
されない。いずれにせよこれによって最適な解決は達成
されなかった。
西独特許第1494402号明細書から低い摩擦係数を有する
保護被膜をつくるための被覆剤が公知である。これは低
分子フッ素化水素ポリマーの分散液および少量の高分子
ポリテトラフルオルエチレンを含んでもよい熱硬化性ま
たは熱可塑性樹脂からなる。
発明が解決しようとする課題： 本発明の課題は、タンタル、ニオブの群からの１つの金
属およびこれらの金属の１つをベースとする合金からな
る成形体の冷間押出成形による製造を最適にすることで
ある。
課題を解決するための手段 前記方法に対するこの課題は、本発明によって、金属ビ
レット上に低分子ポリテトラフルオルエチレンを含有す
る金属酸化物層またはクロルトリフルオルエチレンから
なる潤滑剤膜を設け、次に金属ビレットを超硬合金プラ
ンジャにより１工程で逆押出成形によって成形体に加工
し、その際プランジャが球欠状底面を備えるプランジャ
ヘッドおよびプランジャヘッドからプランジャシャフト
へ移行する範囲に丸面取りバックカットを有することに
よって解決される。
作用： この場合金属ビレットを加工前に陽極酸化し、次にポリ
テトラフルオルエチレン含有溶液をスプレーし、溶剤を
蒸発させるのが有利なことが明らかになった。とくにポ
リテトラフルオルエチレン含有溶液を陽極酸化してとく
に150℃の温度に加熱した金属ビレットへスプレーする
のが有利である。ポリテトラフルオルエチレン含有溶液
としては、粒径10μｍまでの微細な低分子（分子の大き
さ約50000〜100000の範囲内）ポリテトラフルオルエチ
レンと可塑性樹脂の分散体を樹脂用溶剤に溶解した溶液
を使用し、陽極酸化し、場合により加熱した金属ビレッ
トへスプレーするのが有利なことが実証された。熱可塑
性樹脂としては、高いチキソトロピーを有するすべての
樹脂、たとえばデンプン、ポリ酢酸ビニル、スチロール
重合体、セルロースエステル等が挙げられる。適当な溶
剤は、たとえばベンゾール、トルオール、四塩化炭素、
テトラクロルエチレン、フタレートならびに若干の他の
芳香族または脂肪族物質である。成形にはプランジャヘ
ッドの球欠部の高さが20〜30μｍの範囲内のプランジャ
が非常に有効なことが明らかになった。プランジャの材
料としては、とくに炭化タングステンを埋蔵したコバル
ト地からなるものが使用される。
実際に金属ビレットおよび超硬合金プランジャのフロー
テイングをほぼ保証するトライポロジー・システムなら
びにプランジャヘッドの球欠状底面およびプランジャヘ
ッドからプランジャシャフトへの移行部に丸面取りバッ
クカットを有するプランジャの本発明による使用によっ
てタンタル、ニオブまたはこれら金属の１つをベースと
する合金からなる金属ビレットを、自動トランスファー
成形ラインで、成形部材の著しい後加工を必要とせずに
満足かつ連続的に成形することができる。さらに、この
場合、冷間押出成形による成形をただの１工程で実施す
るのが非常に有利である。
実施例： 次に本発明の方法を実施例により詳述する。
まず円筒形タンタルロッドから直径7mm、厚さ6,5mmのビ
レットを切取る。脱脂のため、たとえば2000個の多数の
ビレットを洗浄剤としてフルオルクロル炭化水素、たと
えば1,1,2−トリクロル−1,2,2−トリフルオル−エタン
を含有する常用の超音波洗浄装置へ装入する。この脱脂
工程に、ドラム内での約12時間の振動研摩が続く。研摩
工程は水の添加およびセラミック砥粒の添加のもとに行
われる。
次に研摩した金属ビレットを超硬合金からなる閉じた型
内で平らに圧縮し、それによって金属ビレットの寸法は
直径約9.6mm、厚さ3.6mmに変化する。この平板圧縮工程
に再び前記のような超音波浴中での脱脂が続き、それに
振動研摩が続く、この場合振動研摩時間は約８時間にす
ぎない。このように処理したタンタルビレットを約10-5
mbarの高真空、約1350℃の温度で約１時間再結晶焼鈍す
る。タンタルビレットを室温へ冷却した後、これをクロ
ルトリフルオルエチレンでぬらし、超硬合金の型へ挿入
し、この中でビレットをプレスプランジャにより１圧縮
工程でカップに冷間押出成形する。プレスプランジャヘ
ッドの球欠部の高さは28μｍであり、プレスプランジャ
の材料としてはコバルト地に炭化タングステン粒子を埋
蔵したものを使用した。
本発明により製造したカップはそこの厚さ約0.4mm、長
さ約18mm、内径8.7mm、外径約9.5mmであった。カップは
後加工の必要がなかった。
この実施例の変更形としてトライポロジー・システムと
して、前記のように低分子ポリテトラフルオルエチレン
が浸透した金属酸化物層を使用することもできる。この
トライポロジー・システムの製造は前記例の再結晶工程
に続く。そのため、タンタルビレットを陽極としてリン
酸溶液中へ15〜30分間浸漬する。次に、酸化したタンタ
ルビレットを蒸留水で洗い、乾燥後ポリテトラフルオル
エチレン含有溶液でぬらし、溶剤を約150℃で蒸発させ
る。これに前記のように冷間押出成形が続く。

Claims (7)

    【特許請求の範囲】
  1. 【請求項１】タンタル、ニオブの群からの１つの金属お
    よびこれら金属の１つをベースとする合金からなる成形
    体を潤滑剤としてフッ素含有プラスチックを使用して冷
    間押出成形によって製造する方法において、金属ビレッ
    ト上に低分子ポリテトラフルオルエチレンが浸透した金
    属酸化物層からなるかまたはクロルトリフルオルエチレ
    ンからなる潤滑剤膜を設け、次に金属ビレットを超硬合
    金プランジャを使用して１工程で逆押出成形により成形
    体に冷間成形し、その際プランジャは球欠状底面を備え
    るプランジャヘッドおよびプランジャヘッドからプラン
    ジャシャフトへの移行部の範囲に丸面取りバックカット
    を有することを特徴とする冷間押出成形によって金属か
    らなる成形体を製造する方法。
  2. 【請求項２】金属ビレットを加工前に陽極酸化し、次に
    ポリテトラフルオルエチレン含有溶液をスプレーし、溶
    剤を蒸発させる請求項１記載の方法。
  3. 【請求項３】ポリテトラフルオルエチレン含有溶液を陽
    極酸化して加熱した金属ビレットへスプレーする請求項
    ２記載の方法。
  4. 【請求項４】陽極酸化した金属ビレットを約150℃に加
    熱する請求項３記載の方法。
  5. 【請求項５】微細な低分子ポリテトラフルオルエチレン
    と熱可塑性樹脂の分散体を樹脂用溶剤に溶解した溶液を
    陽極酸化した金属ビレットにスプレーする請求項２から
    ４までのいずれか１項記載の方法。
  6. 【請求項６】金属ビレットをヘッドの球欠部の高さが20
    〜30μｍの範囲にあるプランジャにより成形する請求項
    １から５までのいずれか１項記載の方法。
  7. 【請求項７】コバルトからなり、コバルトの地へ炭化タ
    ングステンの粒子が埋蔵されているプランジャを使用す
    る請求項１から６までのいずれか１項記載の方法。
JP1031260A 1988-02-13 1989-02-13 冷間押出成形によつて金属からなる成形体を製造する方法 Expired - Lifetime JPH0729165B2 (ja)

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DE3804567.2 1988-02-13
DE3804567A DE3804567C1 (ja) 1988-02-13 1988-02-13

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JPH01258837A JPH01258837A (ja) 1989-10-16
JPH0729165B2 true JPH0729165B2 (ja) 1995-04-05

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US (1) US4876868A (ja)
EP (1) EP0328732B1 (ja)
JP (1) JPH0729165B2 (ja)
AT (1) ATE92546T1 (ja)
DE (2) DE3804567C1 (ja)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5013409A (en) * 1989-03-23 1991-05-07 Doug Czor Electrodeposition process
US5307660A (en) * 1992-08-06 1994-05-03 Acheson Industries, Inc. New water based lubricant composition for cold impact extrusion of spark plug bodies or other metal parts and process
KR100405290B1 (ko) * 1994-10-13 2004-02-05 룩스퍼 그룹 리미티드 후방압출방법및제품
US6142001A (en) * 1999-06-09 2000-11-07 The Boc Group, Inc. Cylindrical shell for use in gas cylinder fabrication
AR032233A1 (es) * 2002-01-09 2003-10-29 Maria Eugenia Barrera Un procedimiento para conformar un envase de alta resistencia, particularmente un envase para aerosoles y a un envase obtenido mediante dicho procedimiento
JP5325034B2 (ja) * 2009-07-08 2013-10-23 理研精工株式会社 ホイールナットレンチ並びにその製造方法
US9700925B2 (en) * 2015-11-04 2017-07-11 Vahid Shatermashhadi System and method for hydrostatic backward extrusion

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Publication number Priority date Publication date Assignee Title
US3293203A (en) * 1962-03-26 1966-12-20 Acheson Ind Inc Thermosettable resin compositions and method for forming low friction surface coatings
US3255621A (en) * 1963-08-16 1966-06-14 Haveg Industries Inc Lubrication
US3335073A (en) * 1963-12-27 1967-08-08 Gen Electric Method of making anodized tantalum foil
FR2067226A1 (ja) * 1969-11-27 1971-08-20 Cefilac
DE2635342C2 (de) * 1976-08-03 1981-09-24 Mannesmann AG, 4000 Düsseldorf Presse zum Warmlochen eines Metallblockes
DD231928A3 (de) * 1983-12-16 1986-01-15 Eberhard Schlowag Ausbildung von werkzeug-/werkstueckgrenzflaechen und wirkfugen zum kaltmassivumformen von tantal
JPH05156760A (ja) * 1991-12-06 1993-06-22 Fuji Plant Kogyo Kk 屋根の除雪装置

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Publication number Publication date
JPH01258837A (ja) 1989-10-16
US4876868A (en) 1989-10-31
DE3804567C1 (ja) 1989-05-11
ATE92546T1 (de) 1993-08-15
EP0328732A1 (de) 1989-08-23
EP0328732B1 (de) 1993-08-04
DE3882963D1 (de) 1993-09-09

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