JPS6126600B2 - - Google Patents
Info
- Publication number
- JPS6126600B2 JPS6126600B2 JP53112033A JP11203378A JPS6126600B2 JP S6126600 B2 JPS6126600 B2 JP S6126600B2 JP 53112033 A JP53112033 A JP 53112033A JP 11203378 A JP11203378 A JP 11203378A JP S6126600 B2 JPS6126600 B2 JP S6126600B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- metal plate
- weight
- polyethylene wax
- thickness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910052751 metal Inorganic materials 0.000 claims description 65
- 239000002184 metal Substances 0.000 claims description 65
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims description 30
- 239000004698 Polyethylene Substances 0.000 claims description 21
- -1 polyethylene Polymers 0.000 claims description 21
- 229920000573 polyethylene Polymers 0.000 claims description 21
- 239000004471 Glycine Substances 0.000 claims description 15
- 239000000839 emulsion Substances 0.000 claims description 10
- 230000001050 lubricating effect Effects 0.000 claims description 9
- 239000004814 polyurethane Substances 0.000 claims description 9
- 229920002635 polyurethane Polymers 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005461 lubrication Methods 0.000 claims description 6
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 2
- 239000001254 oxidized starch Substances 0.000 claims description 2
- 235000013808 oxidized starch Nutrition 0.000 claims description 2
- 229920001467 poly(styrenesulfonates) Polymers 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 239000011970 polystyrene sulfonate Substances 0.000 claims description 2
- 229960002796 polystyrene sulfonate Drugs 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 37
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 10
- 239000000314 lubricant Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 229920002125 Sokalan® Polymers 0.000 description 7
- 150000002148 esters Chemical class 0.000 description 7
- 239000004584 polyacrylic acid Substances 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 230000002265 prevention Effects 0.000 description 6
- 239000010960 cold rolled steel Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000013527 degreasing agent Substances 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
Description
本発明は熱延鋼板、冷延鋼板、表面処理鋼板、
ステンレス鋼板、アルミニウム板等の金属板に潤
滑皮膜を被覆したプレス成形加工性の優れた潤滑
処理金属板に関するものである。
近年、自動車メーカーなどで金属板をプレス成
形する際に金属板のプレス成形性の向上、プレス
金型寿命の延長、プレス時の塗油工程の省略、プ
レス油による作業環境汚染防止、ホコリやゴミ等
の金属板への付着防止、金属板の防錆性向上等を
主目的として潤滑処理金属板が使用されている。
このプレス成形に使用される潤滑処理金属板には
下記の諸特性が要求される。
(a) プレス加工の際にダイスに接し金属板の絞り
込み変形の進む面では摩擦係数を小さくし、一
方ポンチと接触する金属板面における摩擦係数
は大きくし加工力を低めて金属板の絞り込み加
工量を最大にするような潤滑効果をもつこと。
(b) プレス成形加工後皮膜を容易に除去出来、塗
装下地処理やめつき前処理を害しないこと。
(c) 積み重ね時、皮膜同志が粘着し合い、離れ難
くならずしかもスリツプして荷崩れを生じない
こと。
(d) プレス成形に先立つて行う連続ブランキング
作業に際して、金属板と送りロール間に滑りが
なく寸法精度の優れたブランキング作業が可能
なこと。
(e) 点溶接性を害しないこと。
(f) プレス時皮膜が剥離してプレス金型にたまら
ないこと。
(g) プレス前後における金属板の防錆性が良いこ
と。
(h) 金属板への潤滑剤の塗布および皮膜形成工程
が簡単迅速で高価な設備を要さぬこと。
従来これらの諸特性を満す潤滑処理金属板とし
て多種のものが発表されている。例えば金属石
鹸、高級脂肪酸、ワツクス等を主成分とした皮膜
を被覆したもの、潤滑剤として金属板との付着性
を高めるため、下地処理として金属表面を燐酸塩
で処理した後、金属石鹸等を塗布するもの等であ
る。しかしこれ等の潤滑処理金属板の表面は非常
に滑り易い状態となつているため積重ねた場合、
荷崩れを生じ易く、またプレス加工に先立つて行
うブランキング作業において潤滑処理金属板と送
りロール間に滑りを生じ易く、寸法精度の優れた
ブランキングが出来ない欠点を有している。一方
これに対して、表面の滑り難いポリ塩化ビニル、
ポリ酢酸ビニル、ポリアクリル酸、ポリメタアク
リル酸樹脂等の有機フイルムを金属表面に被覆し
た金属板もあるが、これ等の有機フイルムではプ
レス加工で要求されるきびしい潤滑性能が得られ
ない。このため、プレス成形加工時に有機フイル
ム表面を軟化、溶解して半流動状にする油を塗布
する方法（特公昭51−3702号公報参照）が提案さ
れているが、この方法は、油によるプレス作業環
境の汚染防止および塗油工程の省略と云う点で未
だ満足すべきものではない。又他方、ホツトメル
トタイプの潤滑剤を金属板に塗布した後、更にそ
の皮膜より摩擦係数の大きい有機皮膜を外層に塗
布した二層よりなる皮膜を形成せしめる方法（特
公昭52−475号参照）も提案されているが、この
方法は潤滑剤塗布と有機皮膜コーテイングのため
の二重の処理工程を要するとともにホツトメルト
潤滑剤皮膜を損傷せずに冷却固化した後、ただち
に有機皮膜を被覆する点においてまだ満足すべき
性能を有する潤滑処理金属板を得るに至つていな
い。
以上のように今まで提案され、既に実用化の段
階にある多種の潤滑処理金属板のうちでプレス成
形加工用潤滑板に要求される前記の諸性能を全て
兼ね備えたものは未だ得られていない。
かくして、本発明の目的はかゝる実状に即応
し、従来の潤滑処理金属板の欠点を改善し、プレ
ス成形加工用金属板に要求される前記諸性能を全
て具有する新規な潤滑処理金属板を提供すること
である。
しかして、上記目的に添う本発明は金属板の表
面を脱脂、酸洗等により清浄にしたのち、所定の
高分子物質および／またはグリシンから選ばれた
成分とポリエチレンワツクスとを含む水溶性ある
いは水に分散させたエマルジヨンを該金属板に塗
布し乾燥時に前記成分を主たる成分とする皮膜を
下層に、ポリエチレンワツクスを主成分とする皮
膜を上層に分離配層すると共に、前記下層皮膜を
0.5〜10μの膜厚に、一方、上層皮膜を0.1〜５μ
の膜厚に形成せしめたことによつて特徴づけられ
る。
上記本発明においてポリエチレンワツクスと共
に使用される前記成分としては、ポリエチレンオ
キサイド、カルボキシメチルセルロース、ポリス
チレンスルフオン酸塩、ポリウレタン、ポリビニ
ルアルコール、酸化デンプン、エーテル化デンプ
ン、ポリアクリル酸エステル、ポリビニルスルフ
オン酸塩、変性ポリエステルスルフオン酸塩、ポ
リアクリル酸エステル−酢酸ビニルコポリマー、
グリシンからなる群から選ばれた一種又は二種以
上の混合物である。就中、かゝる成分のうちで殊
にポリウレタン、ポリエチレンオキサイド、ポリ
アクリル酸エステル、変性ポリエステルスルフオ
ン酸塩、ポリアクリル酸エステル−酢酸ビニルコ
ポリマー、グリシンの群から選ばれた二種以上の
混合物は金属板表面と密着性がよく強靭な皮膜を
形成する点、並びにプレス成形加工後、皮膜を金
属板表面上より容易に除去出来、塗装下地処理や
めつき前処理を害しない点で頗る好ましい。
一方、前記成分と共に使用されるポリエチレン
ワツクスは既知の通常のポリエチレンワツクスで
あり、平均分子量1000〜3000程度が最も普通であ
る。そして、本発明潤滑処理金属板の下層に形成
される皮膜は前記成分が75〜95重量％、ポリエチ
レンワツクスが５〜25重量％の組成からなり、
0.5〜10μの範囲の膜厚でああことが好ましい。
膜厚が0.5μ以下では、プレス成形加工前後の金
属板の防錆性が悪くなり、10μ以上ではプレス成
形加工後、皮膜を弱アルカリ性の脱脂剤等で除去
することが困難になると共に、点溶接性を阻害
し、プレス成形加工時において下層皮膜が剥離し
てプレス金型に付着し、堆積するようになる。
一方、潤滑皮膜における上層皮膜はポリエチレ
ンワツクスを75〜95重量％、前記成分を５〜25重
量％を含む組成からなる皮膜で、0.1〜５μの膜
厚であることが必要であり、特に好ましい膜厚は
１〜２μである。このポリエチレンワツクスを主
成分とする上層皮膜の膜厚が５μ以上になると潤
滑処理金属板を積重ねた場合荷崩れを起し易く、
又ブランキング作業時、金属板と送りロール間で
滑りが生じ易くなり寸法精度の優れたブランキン
グが出来なくなる。又上層皮膜の膜厚が0.1μ以
下になると潤滑処理金属板を積重ねた場合、下層
皮膜同志が粘着し、ブロツキング現象を起すよう
になり好ましくない。更にプレス成形加工時の有
効な潤滑効果を期待するうえで、上層皮膜の膜厚
は１〜２μの範囲であることが好ましい。即ち、
上層皮膜が１μ未満であるとプレス成形加工時ダ
イス肩部での金属板の絞り込変形抵抗を小さくす
るような潤滑効果が小さくなり、金属板の絞り加
工量が減少する。又上層皮膜の膜厚が２μを超え
ると潤滑性が大きくなり過ぎるため、ポンチ肩部
に接した金属板が流動変形し易くなり、ポンチ力
がこの部分に集中するようになり金属板が破断し
易くなる。従つてポンチ肩部の金属板を流動させ
ずに保持し、ダイス肩部の金属板の絞り込み変形
抵抗を低減して、金属板の絞り込み加工量を最大
にするため、上層皮膜の膜厚は１〜２μが最適な
範囲である。
次に本発明金属板における上記の如き潤滑皮膜
を金属板表面に形成せしめる手段としては、先づ
金属板の表面を脱脂、酸洗等により予め清浄にし
た後、この金属板表面に前記高分子物質およびグ
リシンから選ばれた成分と他の成分であるポリエ
チレンワツクスとを同時に含有する水溶液或いは
水分散エマルジヨンをプレコーテイング、ローラ
ーコーテイング、デイツプコーテイング、バーコ
ーテイング等の周知のコーテイング手段により塗
布する。そしてこの高分子物質およびグリシンか
ら選ばれた成分とポリエチレンワツクスを含む塗
層が形成された金属板を熱風強制乾燥工程に送
り、塗層エマルジヨン中より水を速かに蒸発飛散
させて両組成成分による皮膜を金属表面で乾燥固
化するとこの乾燥固化によつて、水に溶解或いは
エマルジヨン状に分散していたポリエチレンワツ
クスと前記高分子物質およびグリシンから選ばれ
た成分とが分離し、金属表面に下層に前記高分子
物質およびグリシンから選ばれた成分を主成分と
する皮膜が、一方上層にポリエチレンワツクスを
主成分とする皮膜が二層になつて形成される。こ
の際、下層皮膜と上層皮膜との両膜厚は水溶液或
いは水に分散させたエマルジヨン中のこれら各成
分の濃度調整や乾燥温度により適宜制御すること
ができる。なお前記下層皮膜と上層皮膜の皮膜は
必ずしも完全に連続した膜面でなくともよく、斑
点状、縞状等の皮膜であつても同様にその効果が
発揮できる。
以上の様にして得られた本発明潤滑処理金属板
は従前の金属板に比較し、プレス成形性が極めて
良好であり、点溶接性を阻害せず、しかも皮膜を
容易に除去し得て、塗装下地処理や、めつき前処
理を害することなく、更に防錆性の面においても
優れた性能を備えており、自動車、家電メーカー
等連続的にプレス成形加工を行なう場合に使用し
て成形加工性の安定、生産能率の向上をもたらす
ことができる。
本発明潤滑処理が適用される金属板としては、
熱延鋼板、冷延鋼板、表面処理鋼板、ステンレス
鋼板の他アルミニウム等の金属板が挙げられる。
以下本発明潤滑処理金属板の効果を明らかにす
るため実施例を掲げる。
（実施例 １）
板厚0.8mmの55キロ級高張力冷延鋼板を素材と
し、これにポリウレタン20重量部、ポリアクリル
酸エステル60重量部、グリシン10重量部からなる
成分にポリエチレンワツクスを10〜40重量部の範
囲で添加した数種の潤滑剤の水エマルジヨンをコ
ーテイングして膜厚２〜３μの下層皮膜と、膜厚
０〜６μの上層皮膜とからなる数種の潤滑皮膜を
もつ金属板を得た。この場合の下層皮膜の組成は
ポリウレタン25重量％、ポリアクリル酸エステル
55重量％、グリシン10重量％、ポリエチレンワツ
クス10重量％であり、上層皮膜の組成はポリウレ
タン３重量％、ポリアクリル酸エステル６重量
％、グリシン５重量％、ポリエチレンワツクス86
重量％であつた。なおコーテイングするエマルジ
ヨン中のポリエチレンワツクスの量の変化により
膜厚の変化のある金属板が得られた。
前記各皮膜の耐スリツプ性判定のため、静止摩
擦係数を傾斜角測定法により求め、鋼板表面の滑
り易さを評価した。
又同鋼板についてブランク径72mm、ポンチ径
33mm（平頭）、ダイス径35.2mm、しわ押え力
1.5トン、絞り速度38mm／minの条件下において
円筒深絞り試験を行ないプレス成形性を調べた。
これらの結果は添付図面に示す通りである。図
中実線は静止摩擦係数を示し、点線は成形高さを
示す。図より明らかな如く、上層皮膜の膜厚が５
μ以上である場合には、鋼板表面の摩擦係数が
0.2以下となり、鋼板表面が滑り易くなる。一
方、鋼板のプレス成形性はポリエチレンワツクス
を主成分として含む上層皮膜の膜厚が0.5〜２μ
の場合、最も好適な潤滑効果を示している。
（実施例 ２）
板厚0.8mmの冷延鋼板（SPCC−SD）にポリエ
チレンワツクスを20重量部とし、これに対する他
方の成分としてポリウレタンを３〜40重量部、ポ
リアクリル酸エステルを６〜80重量部、グリシン
を５〜20重量部の範囲で夫々変化させた数種の潤
滑剤の水エマルジヨンをその表面にコーテイング
して、膜厚０〜15μの下層皮膜で１μの上層皮膜
とからなる潤滑皮膜を形成した。この場合の下層
皮膜の組成はポリウレタン25重量％、ポリアクリ
ル酸エステル55重量％、グリシン10重量％、ポリ
エチレンワツクス10重量％であり、上層皮膜の組
成はポリウレタン３重量％、ポリアクリル酸エス
テル６重量％、グリシン５重量％、ポリエチレン
ワツクス86重量％であつた。
この潤滑処理鋼板をプレス工場内に２ケ月間暴
露後、赤錆発生の有無を観察したところ、上記高
分子物質およびグリシン成分を主成分とする下層
皮膜を0.5μ以上被覆した鋼板上には赤錆の発生
は全く認められなかつた。又、本発明における潤
滑皮膜を弱アルカリ性脱脂剤（日本パーカー社製
脱脂剤フアインクリーナー4326 15ｇ／ｌ，PH＝
9.7浴温63℃）で５分間処理し残存する皮膜の有
無を目視により調べたところ、高分子物質および
グリシンを主成分とする下層皮膜の膜厚が10μ以
下の範囲では鋼板より皮膜がきれいに除去でき、
皮膜除去性が、至つて良好であつた。
又、実施例１と同様な条件下で円筒深絞り試験
を行なつたところ、いづれも絞り込めたが高分子
物質およびグリシンを主成分とする下層皮膜の厚
さが10μ以上になると絞り加工後のダイス表面に
該皮膜が付着残存することが認められた。
（実施例 ３）
板厚0.725mmの冷延鋼板に第１表に示す各組成
の潤滑剤の水エマルジヨンを用いて潤滑皮膜処理
を行ない、第２表の如き皮膜を得、次いでこの得
られた処理鋼板の性能を調べたところ、第３表の
如き結果を得た。第２表、第３表中試料１〜11は
本発明例、試料12〜14は比較例を示す。又第３表
の円筒深絞りにおける成形高さ測定時の円筒深絞
り条件は実施例１におけるそれと同様であり、張
り出し高さ測定における張り出し条件はブランク
径120mm、ポンチ径50mm円頭、ダイス径60mm
、しわ押え力５トン、張り出し速度38mm／min
である。
又、皮膜除去性、防錆性は実施例２と同様な方
法で観察した。一方耐スリツプ性は実施例１にお
ける傾斜角測定法による静摩擦係数により判定し
た。更に点溶接性は溶接電流9000Aでスポツト溶
接時の溶接の可否を判定した。
The present invention relates to hot-rolled steel sheets, cold-rolled steel sheets, surface-treated steel sheets,
The present invention relates to a lubricated metal plate, such as a stainless steel plate or an aluminum plate, which is coated with a lubricating film and has excellent press-formability. In recent years, when press forming metal sheets at automobile manufacturers, etc., improvements have been made to improve the press formability of metal sheets, extend the life of press molds, omit the oiling process during pressing, prevent pollution of the working environment due to press oil, and prevent dust and dirt. Lubricated metal plates are used primarily for the purpose of preventing metal plates from adhering to metal plates, such as metal plates, and improving the rust prevention properties of metal plates.
The following properties are required of the lubricated metal plate used in this press forming. (a) During press working, the friction coefficient is reduced on the surface of the metal plate that contacts the die and undergoes drawing deformation, while the friction coefficient on the surface of the metal plate that comes into contact with the punch is increased and the processing force is lowered to perform drawing of the metal plate. To have a lubricating effect that maximizes the amount of lubrication. (b) The film can be easily removed after press molding and does not harm the base treatment for painting or the pre-glazing treatment. (c) When stacking, the films should adhere to each other and not be difficult to separate, and should not slip and cause the load to collapse. (d) During continuous blanking work performed prior to press forming, there is no slippage between the metal plate and the feed roll, making it possible to perform blanking work with excellent dimensional accuracy. (e) Do not impair spot weldability. (f) The film should not peel off during pressing and accumulate in the press mold. (g) The metal plate should have good rust prevention properties before and after pressing. (h) The process of applying lubricant to the metal plate and forming a film is simple and quick, and does not require expensive equipment. Various types of lubricated metal plates that meet these characteristics have been published. For example, those coated with a film mainly composed of metal soap, higher fatty acids, wax, etc., and those coated with a film mainly composed of metal soap, etc. as a lubricant to improve adhesion to the metal plate, after treating the metal surface with phosphate as a base treatment. These include things to be applied. However, the surfaces of these lubricated metal plates are extremely slippery, so when stacked,
This method has disadvantages in that the load tends to collapse, and slipping occurs easily between the lubricated metal plate and the feed roll during blanking work performed prior to press working, making it impossible to perform blanking with excellent dimensional accuracy. On the other hand, polyvinyl chloride with a non-slip surface,
Although there are metal plates whose metal surfaces are coated with organic films such as polyvinyl acetate, polyacrylic acid, and polymethacrylic acid resins, these organic films cannot provide the severe lubrication performance required in press working. For this reason, a method has been proposed (see Japanese Patent Publication No. 51-3702) in which oil is applied to soften and dissolve the organic film surface during press forming to make it semi-fluid. This method is still unsatisfactory in terms of preventing contamination of the working environment and omitting the oiling process. On the other hand, there is a method in which a hot-melt type lubricant is applied to a metal plate, and then an organic film having a higher coefficient of friction than that film is applied as an outer layer to form a two-layer film (see Japanese Patent Publication No. 52-475). has also been proposed, but this method requires two processing steps for lubricant application and organic film coating, and it is difficult to apply the organic film immediately after cooling and solidifying the hot melt lubricant film without damaging it. A lubricated metal plate with satisfactory performance has not yet been obtained. As mentioned above, among the various types of lubricated metal plates that have been proposed so far and are already in the stage of practical application, one that has all of the above-mentioned performances required for a lubricated plate for press forming has not yet been obtained. . Thus, the object of the present invention is to immediately respond to such actual conditions, to improve the shortcomings of conventional lubricated metal plates, and to provide a novel lubricated metal plate that has all of the above-mentioned performances required of metal plates for press forming. The goal is to provide the following. According to the present invention, the surface of a metal plate is cleaned by degreasing, pickling, etc., and then a water-soluble or An emulsion dispersed in water is applied to the metal plate, and when it dries, a film containing the above-mentioned components as the main component is applied as a lower layer, and a film containing polyethylene wax as the main component is applied as an upper layer.
The film thickness is 0.5 to 10μ, while the upper layer is 0.1 to 5μ.
It is characterized by having a film thickness of . The components used with the polyethylene wax in the present invention include polyethylene oxide, carboxymethylcellulose, polystyrene sulfonate, polyurethane, polyvinyl alcohol, oxidized starch, etherified starch, polyacrylic acid ester, polyvinyl sulfonate. , modified polyester sulfonate, polyacrylate-vinyl acetate copolymer,
It is one type or a mixture of two or more types selected from the group consisting of glycine. Among these components, mixtures of two or more selected from the group of polyurethanes, polyethylene oxides, polyacrylic esters, modified polyester sulfonates, polyacrylic ester-vinyl acetate copolymers, and glycine. is highly preferred because it forms a strong film with good adhesion to the surface of the metal plate, and the film can be easily removed from the surface of the metal plate after press molding, and does not impair the base treatment for painting or pre-glazing treatment. On the other hand, the polyethylene wax used together with the above components is a known ordinary polyethylene wax, and most commonly has an average molecular weight of about 1,000 to 3,000. The film formed on the lower layer of the lubricated metal plate of the present invention has a composition of 75 to 95% by weight of the above components and 5 to 25% by weight of polyethylene wax,
It is preferable to have a film thickness in the range of 0.5 to 10μ.
If the film thickness is less than 0.5μ, the rust prevention properties of the metal plate before and after press forming will be poor, and if it is more than 10μ, it will be difficult to remove the film with a weak alkaline degreaser etc. after press forming, and it will cause spots. This impairs weldability, and during press forming, the lower layer film peels off, adheres to the press mold, and becomes deposited. On the other hand, the upper layer of the lubricating film is a film consisting of a composition containing 75 to 95% by weight of polyethylene wax and 5 to 25% by weight of the above-mentioned components, and has a film thickness of 0.1 to 5μ, which is particularly preferable. The film thickness is 1 to 2μ. If the thickness of the upper layer film, which is mainly composed of polyethylene wax, is 5 μm or more, stacking of lubricated metal plates will easily cause the load to collapse.
Furthermore, during blanking work, slippage tends to occur between the metal plate and the feed roll, making it impossible to perform blanking with excellent dimensional accuracy. Moreover, if the thickness of the upper layer film is less than 0.1 μm, when lubricated metal plates are stacked, the lower layer films will stick to each other, causing a blocking phenomenon, which is not preferable. Furthermore, in order to expect an effective lubrication effect during press molding, the thickness of the upper layer film is preferably in the range of 1 to 2 microns. That is,
If the upper layer film has a thickness of less than 1 μm, the lubricating effect that reduces the drawing deformation resistance of the metal plate at the die shoulder during press forming will be small, and the amount of drawing of the metal plate will be reduced. Furthermore, if the thickness of the upper layer film exceeds 2μ, the lubricity becomes too large, making it easy for the metal plate in contact with the punch shoulder to flow and deform, and the punching force to be concentrated in this area, causing the metal plate to break. It becomes easier. Therefore, in order to hold the metal plate at the punch shoulder without flowing, reduce the drawing deformation resistance of the metal plate at the die shoulder, and maximize the drawing amount of the metal plate, the thickness of the upper layer film is set to 1. ~2μ is the optimal range. Next, as a means for forming the above-mentioned lubricating film on the metal plate surface of the metal plate of the present invention, the surface of the metal plate is first cleaned by degreasing, pickling, etc., and then the above-mentioned polymer is applied to the metal plate surface. An aqueous solution or water-dispersed emulsion containing a component selected from the substance and glycine and another component, polyethylene wax, is applied by a well-known coating method such as pre-coating, roller coating, dip coating, or bar coating. Then, the metal plate on which a coating layer containing polyethylene wax and a component selected from the polymeric substance and glycine has been formed is sent to a hot air forced drying process, where water is quickly evaporated and scattered from the coating layer emulsion, and both compositions are When the film formed by the component is dried and solidified on the metal surface, the polyethylene wax dissolved in water or dispersed in an emulsion form is separated from the component selected from the polymeric substance and glycine, and the film is dried and solidified on the metal surface. Two layers are formed: the lower layer is a film mainly composed of components selected from the above-mentioned polymeric substances and glycine, and the upper layer is a film mainly composed of polyethylene wax. At this time, the thicknesses of both the lower layer film and the upper layer film can be appropriately controlled by adjusting the concentration of each of these components in the aqueous solution or emulsion dispersed in water and by controlling the drying temperature. Note that the lower layer film and the upper layer film do not necessarily have to be completely continuous film surfaces, and even if the film surfaces are spot-like, striped, etc., the same effect can be exhibited. The lubricated metal plate of the present invention obtained as described above has extremely good press formability compared to conventional metal plates, does not impede spot weldability, and can easily remove the film. It does not harm the base treatment for painting or pre-plating treatment, and also has excellent rust prevention performance, making it suitable for use in continuous press forming operations such as automobile and home appliance manufacturers. It can bring about stability of production and improvement of production efficiency. The metal plate to which the lubrication treatment of the present invention is applied is as follows:
Examples include hot-rolled steel plates, cold-rolled steel plates, surface-treated steel plates, stainless steel plates, and metal plates such as aluminum. Examples will be given below to clarify the effects of the lubricated metal plate of the present invention. (Example 1) A 55 kg class high-strength cold-rolled steel plate with a thickness of 0.8 mm was used as the material, and 10 parts by weight of polyethylene wax was added to the ingredients consisting of 20 parts by weight of polyurethane, 60 parts by weight of polyacrylic acid ester, and 10 parts by weight of glycine. Metals with several types of lubricant coatings made by coating with water emulsions of several types of lubricants added in the range of ~40 parts by weight, consisting of a lower layer coating with a thickness of 2 to 3 μm and an upper layer coating with a thickness of 0 to 6 μm. Got the board. In this case, the composition of the lower layer film is 25% by weight polyurethane, polyacrylic acid ester.
The composition of the upper layer film is 3% by weight polyurethane, 6% by weight polyacrylate, 5% by weight glycine, 86% by weight polyethylene wax.
It was in weight%. Note that metal plates with varying film thicknesses were obtained by varying the amount of polyethylene wax in the coating emulsion. In order to evaluate the slip resistance of each film, the coefficient of static friction was determined by an inclination angle measurement method, and the slipperiness of the steel plate surface was evaluated. Also, for the same steel plate, the blank diameter is 72 mm and the punch diameter is
33mm (flat head), die diameter 35.2mm, wrinkle holding force
A cylindrical deep drawing test was conducted under conditions of 1.5 tons and drawing speed of 38 mm/min to examine press formability. These results are shown in the attached drawings. In the figure, the solid line indicates the coefficient of static friction, and the dotted line indicates the molding height. As is clear from the figure, the thickness of the upper layer film is 5.
If it is more than μ, the friction coefficient of the steel plate surface is
If it becomes less than 0.2, the steel plate surface becomes slippery. On the other hand, the press formability of steel sheets is determined by the thickness of the upper layer film containing polyethylene wax as a main component of 0.5 to 2 μm.
shows the most favorable lubrication effect. (Example 2) 20 parts by weight of polyethylene wax was added to a cold rolled steel plate (SPCC-SD) with a thickness of 0.8 mm, and 3 to 40 parts by weight of polyurethane and 6 to 80 parts by weight of polyacrylic acid ester were added as the other components. The surface is coated with a water emulsion of several types of lubricants with different parts by weight and glycine in the range of 5 to 20 parts by weight, and a lubricant consisting of a lower layer film with a thickness of 0 to 15 μm and an upper layer film of 1 μm. A film was formed. In this case, the composition of the lower layer film is 25% by weight of polyurethane, 55% by weight of polyacrylic acid ester, 10% by weight of glycine, and 10% by weight of polyethylene wax, and the composition of the upper layer film is 3% by weight of polyurethane, 6% by weight of polyacrylic acid ester. % by weight, glycine 5% by weight, and polyethylene wax 86% by weight. After exposing this lubricated steel plate in a press factory for two months, we observed the presence or absence of red rust, and found that there was no red rust on the steel plate coated with a lower layer film of 0.5μ or more mainly composed of the above-mentioned polymeric substance and glycine component. No occurrence was observed. In addition, the lubricating film in the present invention is treated with a weak alkaline degreaser (Degreaser Fine Cleaner 4326 manufactured by Nippon Parker Co., Ltd. 15 g/l, PH=
9.7 (bath temperature: 63°C) for 5 minutes and visually inspected for the presence or absence of any remaining film. It was found that the film was removed more clearly than the steel plate when the thickness of the lower layer film, which mainly consists of polymeric substances and glycine, was 10μ or less. I can,
The film removability was extremely good. In addition, when a cylindrical deep drawing test was conducted under the same conditions as in Example 1, it was possible to draw in all cases, but when the thickness of the lower layer film, which is mainly composed of polymeric substances and glycine, exceeded 10 μm, it became difficult to draw after drawing. It was observed that the film remained attached to the surface of the die. (Example 3) A cold-rolled steel plate with a thickness of 0.725 mm was treated with a lubricating film using a water emulsion of a lubricant having the composition shown in Table 1 to obtain a film as shown in Table 2. When the performance of the treated steel sheet was investigated, the results shown in Table 3 were obtained. In Tables 2 and 3, samples 1 to 11 show examples of the present invention, and samples 12 to 14 show comparative examples. In addition, the cylindrical deep drawing conditions for measuring the forming height in cylindrical deep drawing in Table 3 are the same as those in Example 1, and the overhang conditions for measuring the overhang height are blank diameter 120 mm, punch diameter 50 mm round head, die diameter 60 mm.
, wrinkle holding force 5 tons, overhang speed 38mm/min
It is. Further, film removability and rust prevention properties were observed in the same manner as in Example 2. On the other hand, the slip resistance was determined by the static friction coefficient determined by the inclination angle measurement method in Example 1. Furthermore, spot weldability was determined by determining whether or not welding could be performed during spot welding at a welding current of 9000A.
【表】【table】
【表】【table】
【表】
上表の結果から明らかな様に潤滑処理を行なわ
なかつた試料14や、防錆油塗布試料13はプレス成
形性、防錆性が極めて悪く、下層にグリースを塗
布し、上層にポリエチレンフイルムを被覆した試
料12は皮膜除去性と、点溶接性において劣つてい
る。これに対して本発明例である試料１〜11はプ
レス成形性、皮膜除去性、防錆性、耐スリツプ
性、点溶接性ともに優れた性能を示すことが判
る。
上記実施例１，２，３の各例を綜合し、本発明
プレス成形加工用潤滑処理鋼板は、プレス成形加
工用として要求される諸性能を充分に満足し、連
続的プレス成形加工に使用して極めて有用性に富
む金属板である。[Table] As is clear from the results in the table above, sample 14, which was not lubricated, and sample 13, which was coated with anti-rust oil, had extremely poor press formability and anti-rust properties. Sample 12 coated with a film was inferior in film removability and spot weldability. On the other hand, it can be seen that Samples 1 to 11, which are examples of the present invention, exhibit excellent performance in terms of press formability, film removability, rust prevention, slip resistance, and spot weldability. Combining the above Examples 1, 2, and 3, the lubricated steel sheet for press forming of the present invention fully satisfies the various performances required for press forming, and can be used for continuous press forming. This metal plate is extremely useful.
図は下層皮膜の膜厚が２〜３μである場合にお
いて上層皮膜の膜厚と静止摩擦係数及び成形高さ
との各関係を示す図である。
The figure shows the relationship between the thickness of the upper layer film, the coefficient of static friction, and the molding height when the thickness of the lower layer film is 2 to 3 μm.
Claims (1)
工用潤滑処理金属板であつて、前記潤滑皮膜が、
ポリエチレンオキサイド、カルボキシメチルセル
ロース、ポリスチレンスルフオン酸塩、ポリウレ
タン、ポリビニルアルコール、酸化デンプン、エ
ーテル化デンプン、ポリアクリル酸エステル、ポ
リビニルスルフオン酸塩、変性ポリエステルスル
フオン酸塩、ポリアクリル酸エステル−酢酸ビニ
ルコポリマーの群から選ばれた１種又は２種以上
の高分子物質および／またはグリシンからなる成
分を75〜95重量％含有し、残部がポリエチレンワ
ツクスからなる、0.5〜10μの膜厚を有する下層
皮膜と、前記成分を５〜25重量％含有し、残部は
ポリエチレンワツクスからなる、0.1〜５μの膜
厚を有する上層皮膜との両層からなつていること
を特徴とするプレス成形加工用潤滑処理金属板。 ２ 上記成分とポリエチレンワツクスとを分散さ
せた水エマルジヨンを金属板表面に塗布し、強制
乾燥して上下二層に分離形成させてなる特許請求
の範囲第１項記載のプレス成形加工用潤滑処理金
属板。[Scope of Claims] 1. A lubricated metal plate for press forming formed with a lubricating film on the surface, the lubricating film comprising:
Polyethylene oxide, carboxymethyl cellulose, polystyrene sulfonate, polyurethane, polyvinyl alcohol, oxidized starch, etherified starch, polyacrylate, polyvinyl sulfonate, modified polyester sulfonate, polyacrylate-vinyl acetate copolymer A lower layer film having a film thickness of 0.5 to 10μ, containing 75 to 95% by weight of a component consisting of one or more polymeric substances selected from the group of and/or glycine, with the balance consisting of polyethylene wax. and an upper layer film having a film thickness of 0.1 to 5μ, containing 5 to 25% by weight of the above-mentioned components, and the remainder being polyethylene wax. metal plate. 2. A lubrication treatment for press forming according to claim 1, in which a water emulsion in which the above components and polyethylene wax are dispersed is applied to the surface of a metal plate, and forced drying is performed to separate and form upper and lower two layers. metal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11203378A JPS5538840A (en) | 1978-09-11 | 1978-09-11 | Lubricating metal plate for press molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11203378A JPS5538840A (en) | 1978-09-11 | 1978-09-11 | Lubricating metal plate for press molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5538840A JPS5538840A (en) | 1980-03-18 |
| JPS6126600B2 true JPS6126600B2 (en) | 1986-06-21 |
Family
ID=14576317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11203378A Granted JPS5538840A (en) | 1978-09-11 | 1978-09-11 | Lubricating metal plate for press molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5538840A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0832907B2 (en) * | 1990-09-21 | 1996-03-29 | 日本パーカライジング株式会社 | Film-removing type lubricating composition and method for producing lubricated steel sheet |
| JP4787625B2 (en) * | 2006-02-13 | 2011-10-05 | 株式会社神戸製鋼所 | Lubricating composition coated metal sheet |
| JP5643625B2 (en) * | 2010-12-07 | 2014-12-17 | 日本パーカライジング株式会社 | Steel sheet having a film removal type lubricant film on its surface, and method for producing a coated steel sheet |
| JP6157259B2 (en) * | 2013-07-30 | 2017-07-05 | 株式会社Moresco | Lubricant composition for impact press processing, metal workpiece and coating method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5222948A (en) * | 1975-08-15 | 1977-02-21 | Automob Antipollut & Saf Res Center | Liquid level detector |
-
1978
- 1978-09-11 JP JP11203378A patent/JPS5538840A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5222948A (en) * | 1975-08-15 | 1977-02-21 | Automob Antipollut & Saf Res Center | Liquid level detector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5538840A (en) | 1980-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1272475A (en) | Metal working lubricant | |
| US5442005A (en) | Multi-function protective coating for zinc coated steel surfaces and its alloys | |
| KR930010436B1 (en) | Coating composition and with improved rust-preventing properties for use in preparing lubricated steel products | |
| US4753743A (en) | Hot melt metalworking lubricant | |
| US4846986A (en) | Oil-in-water dry film prelube emulsion | |
| US5209860A (en) | Acrylate polymer-fatty triglyceride aqueous dispersion prelubes for all metals | |
| JPS6126600B2 (en) | ||
| JP3016962B2 (en) | Rust-preventive oil for both press working | |
| JP3702193B2 (en) | Non-delaminating lubricated galvanized steel sheet with excellent corrosion resistance after machining | |
| JP4122531B2 (en) | Film-removal type lubricating coating composition with excellent deep drawability, anti-scoring and temporary anti-rust properties | |
| EP0438607B1 (en) | Coiled steel strip with solid lubricant coating | |
| JPH1088364A (en) | Decoating type lubricating treated aluminum sheet and its production | |
| US5091100A (en) | Fatty triglyceride-in-water solid film high temperature prelube emulsion for hot rolled steel | |
| JP3536489B2 (en) | Stripped lubricated steel sheet with excellent deep drawability and galling resistance | |
| JP3835006B2 (en) | Lubricated steel sheet and alkali film removal type lubricated steel sheet | |
| JPH0633272A (en) | Rust preventing oil composition | |
| JP2002361302A (en) | Method for rolling metal material plate | |
| JP2900242B2 (en) | Lubricating oil for plastic working of metallic materials | |
| JPH04222666A (en) | Thermoplastic acryl coated steel plate and coating formation method | |
| JP2001200287A (en) | Lubricant for steel plate | |
| JP3536490B2 (en) | Stripped lubricated steel sheet with excellent press workability and primary rust resistance | |
| JP3204156B2 (en) | High lubrication rust-proof steel plate | |
| JP2696461B2 (en) | Hard lubricated plated steel sheet with excellent pressability and sliding wear resistance | |
| JPS6216240B2 (en) | ||
| JP4027865B2 (en) | Lubricated metal material and its manufacturing method |