JPH05208201A - Metal plate excellent in press formability and postcoating clearness - Google Patents
Metal plate excellent in press formability and postcoating clearnessInfo
- Publication number
- JPH05208201A JPH05208201A JP4316895A JP31689592A JPH05208201A JP H05208201 A JPH05208201 A JP H05208201A JP 4316895 A JP4316895 A JP 4316895A JP 31689592 A JP31689592 A JP 31689592A JP H05208201 A JPH05208201 A JP H05208201A
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- JP
- Japan
- Prior art keywords
- metal plate
- roll
- pattern
- plate
- press formability
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プレス成形性及び塗装
後鮮映性に優れる金属板に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal plate having excellent press formability and image clarity after painting.
【０００２】[0002]
【従来の技術】従来より、プレス加工用金属板をショッ
トダル仕上げロールや、レーザ加工ダル仕上げロールに
よって圧延して製造する方法がある。レーザビームによ
って表面を直接溶融加工したダル仕上げロールによって
鋼板を圧延する方法は多数開発されている。例えば特公
平３−３８９２３号公報、特公平３−３８９２４号公
報、特公平３−３９７６１号公報、特公平３−４２９６
１号公報、特公平３−４７９２５号公報等がある。いず
れもロール表面に高エネルギー密度のレーザビームを照
射すると同時にアシストガスを吹付け、ロール表面にク
レータ状をなす突起、すなわちドーナツ状又は三日月状
の突起を形成し、その突起を圧延によって鋼板表面に転
写して凹部を形成させるものであり、凹部の形状はドー
ナツ状又は三日月状のものに限られる。2. Description of the Related Art Conventionally, there is a method of rolling a metal plate for press working by a shot dull finishing roll or a laser working dull finishing roll. Many methods of rolling a steel sheet by a dull finishing roll whose surface is directly melt-processed by a laser beam have been developed. For example, Japanese Patent Publication No. 3-38923, Japanese Patent Publication No. 3-38924, Japanese Patent Publication No. 3-39761, and Japanese Patent Publication No. 3-4296.
1 and Japanese Patent Publication No. 3-47925. In both cases, the roll surface is irradiated with a high energy density laser beam, and at the same time, an assist gas is blown to form crater-shaped projections on the roll surface, that is, donut-shaped or crescent-shaped projections, and the projections are rolled to the steel plate surface. The concave portion is formed by transferring and the shape of the concave portion is limited to a donut shape or a crescent shape.
【０００３】[0003]
【発明が解決しようとする課題】一般にプレス成形性を
向上させるためには、金属板表面により多くの凹部分を
形成して、プレス加工用潤滑油の捕捉量を増やすことが
有効である。ところが、レーザビームによってロール表
面を直接溶融加工してロール表面にクレータ状の突起を
形成し、その突起を圧延によって金属板表面に転写して
凹部を形成する方法では、凹部の形状はドーナツ状又は
三日月状のものに限られる。このような方法では凹部の
形状が限られるため、金属板の全表面積に対して凹部の
占める面積率を高くとれないという問題があった。Generally, in order to improve the press formability, it is effective to form more recessed portions on the surface of the metal plate to increase the trapping amount of the lubricating oil for press working. However, in the method of directly melting the roll surface with a laser beam to form a crater-like protrusion on the roll surface and transferring the protrusion to the metal plate surface by rolling to form a recess, the shape of the recess is a donut shape or Limited to crescent moon. In such a method, since the shape of the recess is limited, there is a problem in that the area ratio occupied by the recess cannot be set high relative to the total surface area of the metal plate.
【０００４】一方、塗装後鮮映性を高めるためには金属
板の全表面積に対して平坦な部分の占める面積率を高く
とらなければならず、プレス成形性と塗装後鮮映性を同
時に高めることは従来技術では互いに矛盾することであ
った。本発明はこのような矛盾した特性を併有し、プレ
ス成形性と塗装後鮮映性に優れる金属板を提供すること
を目的とする。On the other hand, in order to improve the post-painting image clarity, the area ratio of the flat portion to the total surface area of the metal plate must be high, so that the press formability and the post-paint image clarity are simultaneously enhanced. That is in the prior art, they contradict each other. It is an object of the present invention to provide a metal plate having both such contradictory characteristics and excellent press formability and image clarity after coating.
【０００５】[0005]
【課題を解決するための手段】本発明は、ダル仕上げ金
属板であって、独立した凹部が表面に一様に分布するこ
と、凹部の底面が平坦であること、凹部の直径又は一辺
の長さが４００μｍ以下であること、凹部の深さが２μ
ｍ以上１５μｍ以下であること、及び凹部の面積率が２
０％以上であることを特徴とするプレス成形性と塗装後
鮮映性に優れる金属板である。DISCLOSURE OF THE INVENTION The present invention is a dull-finished metal plate in which independent recesses are evenly distributed on the surface, the bottom of the recess is flat, the diameter of the recess or the length of one side. Is 400 μm or less, and the depth of the recess is 2 μm
m or more and 15 μm or less, and the area ratio of the recesses is 2
It is a metal plate excellent in press formability and image clarity after coating, which is characterized by being 0% or more.
【０００６】このような金属板は圧延ロールの表面の微
細な凸部がエッチングされていないロールを用いてブラ
イト鋼板又はアルミニウム板を加工することによって得
られる。このような圧延ロールはＹＡＧレーザを用いる
かフィルム転写法によって得られる。Such a metal plate can be obtained by processing a bright steel plate or an aluminum plate using a roll in which the fine projections on the surface of the rolling roll are not etched. Such a rolling roll can be obtained by using a YAG laser or a film transfer method.
【０００７】[0007]
【作用】従来のレーザダル仕上げの金属板は平坦部分が
全く存在しないか又は凹部以外の部分が平坦となってお
り、プレス成形性と塗装後鮮映性を両立させることが困
難であった。本発明の金属板は凹部の底部が平坦なので
凹部面積率を高くしても塗装後鮮映性が劣化しないとい
う優れた特性を有する。In the conventional metal plate having a laser dull finish, there is no flat portion or the portion other than the concave portion is flat, and it is difficult to achieve both press formability and clearness after painting. The metal plate of the present invention has an excellent property that the image clarity after coating does not deteriorate even if the area ratio of the recess is increased because the bottom of the recess is flat.
【０００８】プレス成形性を向上させるためには潤滑油
を表面に捕捉するため、独立した凹部を一様に分布させ
ることが必要である。凹部の大きさは、潤滑油の封じ込
めを確保するためにプレス成形時の工具と金属板の接触
長さの半分以下でなければならず、実用的な値として４
００μｍ以下が適当であるからこのように限定した。In order to improve the press formability, it is necessary to uniformly distribute the independent recesses in order to capture the lubricating oil on the surface. The size of the recess must be less than half the contact length between the tool and the metal plate during press forming to ensure the containment of lubricating oil.
Since it is suitable that the diameter is not more than 00 μm, it is limited in this way.
【０００９】凹部の深さは、浅すぎるとプレス成形中に
潰れて消滅するので、最低２μｍ以上必要であり、一方
深すぎると封じ込めた潤滑油の静水圧が高くならず十分
な潤滑効果が得られないので１５μｍ以下が適当であ
る。凹部の面積率は２０％以上とする。上限は加工上の
制約から８５％程度である。凹部の面積率が２０％未満
では摩擦係数が十分に低くならないので２０％以上とす
る。好ましくは２５〜６５％である。If the depth of the recess is too shallow, it will be crushed and disappear during press molding, so at least 2 μm is necessary. Since it is not possible, 15 μm or less is suitable. The area ratio of the recesses is 20% or more. The upper limit is about 85% due to processing restrictions. If the area ratio of the recesses is less than 20%, the coefficient of friction does not become sufficiently low, so it is set to 20% or more. It is preferably 25 to 65%.
【００１０】本発明が対象とする金属板としては、冷延
鋼板、アルミニウム板、溶融亜鉛めっき鋼板、電気亜鉛
めっき鋼板、溶融アルミニウムめっき鋼板、錫めっき鋼
板、ステンレス鋼板等がある。Examples of the metal plate targeted by the present invention include a cold rolled steel plate, an aluminum plate, a hot dip galvanized steel plate, an electrogalvanized steel plate, a hot dip aluminum plated steel plate, a tin plated steel plate and a stainless steel plate.
【００１１】[0011]
【実施例】以下、本発明の実施例について説明する。 実施例 １ 図１に示すダルパターン表面を有する金属板（極低炭素
鋼板）１０を製造した。圧延用ロール表面に光吸収材を
混入した耐酸性樹脂を形成し、Ｑスイッチ付きＹＡＧレ
ーザを用いて、該樹脂膜に模様をマーキング加工して該
模様通りに塗膜の一部を除去し、このロール表面にエッ
チング処理を施し、ロール表面に板面と逆の凹凸模様を
付与した。このロールにて極低炭素鋼板ブライト仕上材
を圧延し図１に示すダルパターン表面を有する金属板
（極低炭素鋼板）１０を得た。EXAMPLES Examples of the present invention will be described below. Example 1 A metal plate (very low carbon steel plate) 10 having a dull pattern surface shown in FIG. 1 was manufactured. An acid-resistant resin mixed with a light-absorbing material is formed on the surface of a rolling roll, a pattern is marked on the resin film by using a YAG laser with a Q switch, and a part of the coating film is removed according to the pattern, The surface of this roll was subjected to an etching treatment to give a concavo-convex pattern to the surface of the roll, which was the reverse of the plate surface. The ultra-low carbon steel sheet bright finish material was rolled by this roll to obtain a metal plate (ultra-low carbon steel sheet) 10 having a dull pattern surface shown in FIG.
【００１２】金属板（極低炭素鋼板）１０の凹部１１の
直径又は一辺の長さが４００μｍ以下、深さが２μｍ以
上１５μｍ以下で底面が平坦な独立した凹部１１が表面
に一様に分布しており、凹部１１の面積率が２０％以上
となるように形成されている。図２に示す摺動試験によ
ってこの鋼板の潤滑性能を従来材と比較した。摺動試験
は曲率半径７が２０ｍｍＲの上下押付片１、２に押付力
４、５を加え、幅２０ｍｍ、長さ３０ｍｍの試験片３を
矢印方向に引抜き、そのときの引抜き力６を測定するも
のである。試験片の摺動引抜き速度は１００ｍｍ／ｓｅ
ｃ、移動距離は８０ｍｍである。４０℃における粘度が
１６．３ｃＳｔのプレス油を試験片に塗布し、平均面圧
を５．４ｋｇｆ／ｍｍ2 〜３５．６ｋｇｆ／ｍｍ2 間に
変化させて引抜きを行った。摩擦係数をμ＝引抜力／
（２×押付力）によって求めた。結果を図３に示す。本
発明による鋼板は広い面圧領域で優れた摺動特性を示し
ている。The individual recesses 11 of the metal plate (ultra-low carbon steel plate) 10 having a diameter or one side length of 400 μm or less and a depth of 2 μm or more and 15 μm or less and a flat bottom surface are uniformly distributed on the surface. Thus, the area ratio of the concave portion 11 is formed to be 20% or more. By the sliding test shown in FIG. 2, the lubrication performance of this steel sheet was compared with that of the conventional material. In the sliding test, pressing forces 4 and 5 are applied to the upper and lower pressing pieces 1 and 2 having a curvature radius 7 of 20 mmR, the test piece 3 having a width of 20 mm and a length of 30 mm is pulled out in the arrow direction, and the pulling force 6 at that time is measured. It is a thing. Sliding drawing speed of the test piece is 100 mm / se
c, the moving distance is 80 mm. Viscosity at 40 ° C. was applied press oil 16.3cSt the test piece, by changing the average surface pressure between 5.4kgf / mm 2 ~35.6kgf / mm 2 was withdrawal. Friction coefficient μ = pulling force /
It was determined by (2 × pressing force). Results are shown in FIG. The steel sheet according to the present invention exhibits excellent sliding characteristics in a wide range of surface pressure.
【００１３】また、凹部の形状を深さ３μｍ、一辺３０
０μｍの正方形とし、凹部面積率を変えて摩擦係数を測
定し図４に示した。凹部の面積率が２０％〜６５％のと
きすぐれた性能を示した。次に、塗装後鮮映性を評価す
るのに一般に使用されているＤＯＩ値を従来材と比較し
た結果を図５に示す。ＤＯＩ値は鏡を１００％とし、こ
の値が高い程鮮映性に優れる。従来のショットダル鋼板
ではＤＯＩ値が９０〜９１％程度、従来のＣＯ2 レーザ
ダル鋼板では９４〜９５％であったが、本発明の実施例
では９５〜９７％であった。このように本発明による鋼
板は優れた塗装後鮮映性を示している。Further, the shape of the recess is 3 μm in depth and 30 is formed on one side.
A square having a size of 0 μm was used, and the coefficient of friction was measured by changing the area ratio of the recesses and shown in FIG. Excellent performance was exhibited when the area ratio of the recesses was 20% to 65%. Next, FIG. 5 shows the result of comparison of the DOI value, which is generally used for evaluating the post-painting sharpness, with the conventional material. The mirror has a DOI value of 100%, and the higher this value, the better the image clarity. The DOI value was about 90 to 91% for the conventional shot-dal steel plate and 94 to 95% for the conventional CO 2 laser dull steel plate, but 95 to 97% in the embodiment of the present invention. Thus, the steel sheet according to the present invention exhibits excellent post-painting image clarity.
【００１４】実施例 ２ 次に本発明のアルミ板での実施例を説明する。前述の実
施例１で使用したのと同一のロールで板厚１．０ｍｍの
ＪＩＳ５０００系アルミ合金板に圧下率１．０％のスキ
ンパス圧延を施し、表面に図１の凹凸模様を有するアル
ミ合金板を作成した。凹部の深さは約５μｍである。比
較材として板厚１．０ｍｍのＪＩＳ５０００系アルミ合
金板を公知の技術であるショットダル仕上げロールにて
圧下率１．０％でスキンパス圧延したものを使用した。Example 2 Next, an example of the aluminum plate of the present invention will be described. A JIS 5000 series aluminum alloy plate having a plate thickness of 1.0 mm was subjected to skin pass rolling with a rolling reduction of 1.0% by the same roll as that used in the above-mentioned Example 1, and the aluminum alloy plate having the uneven pattern of FIG. 1 on the surface. It was created. The depth of the recess is about 5 μm. As a comparative material, a JIS 5000 series aluminum alloy plate having a plate thickness of 1.0 mm was skin-pass-rolled at a rolling reduction of 1.0% by a well-known shot dulling roll.
【００１５】耐型かじり性の評価には、前述の実施例１
で使用したのと同様、図２に示す摺動試験を用いた。図
２において、１は半径２０ｍｍの曲率をもつ金型、３は
試験片である。試験条件は、試験片幅２０ｍｍ、摺動速
度１００ｍｍ／秒、摺動距離８０ｍｍ押し付け力２００
ｋｇｆ、潤滑油は防錆油（１６ｃＳｔ ４０℃）であ
る。For the evaluation of mold galling resistance, the above-mentioned Example 1 was used.
The sliding test shown in FIG. 2 was used in the same manner as that used in. In FIG. 2, 1 is a mold having a radius of curvature of 20 mm, and 3 is a test piece. The test conditions are: test piece width 20 mm, sliding speed 100 mm / sec, sliding distance 80 mm, pressing force 200.
kgf, the lubricating oil is rust preventive oil (16 cSt 40 ° C.).
【００１６】試験結果を図６に示す。摩擦係数が小さい
程優れた摺動性能を有することを意味する。本発明によ
って製造されたアルミ合金板は従来材に比較してより広
い面圧領域でより低い摩擦係数を示すという優れた特性
を有する。次に、本発明によって製造されたアルミ合金
板の塗装後鮮映性を評価するため、一般的に使用されて
いるＤＯＩ値を従来の技術によって製造されたショット
ダル仕上げアルミ合金板と比較した結果を図７に示す。
ＤＯＩ値は完全な鏡面を１００％とし、この値が高い程
鮮映性に優れることを示す。従来のショットダル仕上げ
アルミ合金板ではＤＯＩ値が９２％であるのに対し、本
発明によって製造されたアルミ合金板のＤＯＩ値は９６
％であり、優れた塗装後鮮映性を示す。The test results are shown in FIG. The smaller the coefficient of friction, the better the sliding performance. The aluminum alloy sheet produced according to the present invention has the excellent property of exhibiting a lower coefficient of friction in a wider surface pressure region than the conventional material. Next, in order to evaluate the post-painting image clarity of the aluminum alloy sheet produced according to the present invention, the commonly used DOI value was compared with the shotdal finished aluminum alloy sheet produced by the conventional technique. Is shown in FIG.
The DOI value is 100% for a perfect mirror surface, and the higher this value is, the better the sharpness is. The DOI value of the conventional aluminum alloy sheet having a shot dull finish is 92%, whereas the DOI value of the aluminum alloy sheet manufactured according to the present invention is 96.
%, Indicating excellent post-painting clarity.
【００１７】[0017]
【発明の効果】本発明の鋼板はＤＯＩ値が９５％以上の
優れた鮮映性を有し、プレス成形性のきわめて優れた鋼
板であるので、産業界の各方面で賞用される。INDUSTRIAL APPLICABILITY The steel sheet of the present invention has excellent image clarity with a DOI value of 95% or more and is extremely excellent in press formability, and is therefore favored in various fields of industry.
【図１】本発明の板材の表面の形状を示す凹凸測定図で
ある。FIG. 1 is an unevenness measurement diagram showing the shape of the surface of a plate material of the present invention.
【図２】摺動試験の概要を説明する説明図である。FIG. 2 is an explanatory diagram illustrating an outline of a sliding test.
【図３】本発明の板材の摺動試験結果を示すグラフであ
る。FIG. 3 is a graph showing the sliding test results of the plate material of the present invention.
【図４】凹部面積率と摩擦係数との関係を示すグラフで
ある。FIG. 4 is a graph showing a relationship between a recess area ratio and a friction coefficient.
【図５】本発明の板材の鮮映性試験結果を示すグラフで
ある。FIG. 5 is a graph showing the results of the image clarity test of the plate material of the present invention.
【図６】本発明の他の板材の摺動試験結果を示すグラフ
である。FIG. 6 is a graph showing the results of a sliding test of another plate material of the present invention.
【図７】本発明と従来例とのＤＯＩ値の比較を示すグラ
フである。FIG. 7 is a graph showing a comparison of DOI values between the present invention and a conventional example.
１、２ 上下押付片 ３ 試験片 ４、５ 押付力 ６ 引抜き力 ７ 曲率半径 １０ 金属板 １１ 凹部 1, 2 Vertical pressing piece 3 Test piece 4, 5 Pressing force 6 Extraction force 7 Curvature radius 10 Metal plate 11 Recess
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【手続補正書】[Procedure amendment]
【提出日】平成４年１１月２７日[Submission date] November 27, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図１[Name of item to be corrected] Figure 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図１】 [Figure 1]
Claims (1)
辺の長さが４００μｍ以下、深さが２μｍ以上１５μｍ
以下で底面が平坦な独立した凹部が表面に一様に分布し
ており、該凹部の面積率が２０％以上であることを特徴
とするプレス成形性及び塗装後鮮映性に優れる金属板。1. A dull-finished metal plate having a diameter or a side length of 400 μm or less and a depth of 2 μm or more and 15 μm.
A metal plate excellent in press formability and image clarity after painting, characterized in that independent recesses having a flat bottom surface are uniformly distributed below, and the area ratio of the recesses is 20% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4316895A JPH05208201A (en) | 1991-12-03 | 1992-11-26 | Metal plate excellent in press formability and postcoating clearness |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3-344035 | 1991-12-03 | ||
| JP34403591 | 1991-12-03 | ||
| JP4316895A JPH05208201A (en) | 1991-12-03 | 1992-11-26 | Metal plate excellent in press formability and postcoating clearness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05208201A true JPH05208201A (en) | 1993-08-20 |
Family
ID=26568845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4316895A Withdrawn JPH05208201A (en) | 1991-12-03 | 1992-11-26 | Metal plate excellent in press formability and postcoating clearness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05208201A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020501906A (en) * | 2016-12-14 | 2020-01-23 | ポスコＰｏｓｃｏ | Rolling roll and plated steel sheet produced thereby |
-
1992
- 1992-11-26 JP JP4316895A patent/JPH05208201A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020501906A (en) * | 2016-12-14 | 2020-01-23 | ポスコＰｏｓｃｏ | Rolling roll and plated steel sheet produced thereby |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000201 |