JP3140219B2 - Sliding test method - Google Patents
Sliding test methodInfo
- Publication number
- JP3140219B2 JP3140219B2 JP04287536A JP28753692A JP3140219B2 JP 3140219 B2 JP3140219 B2 JP 3140219B2 JP 04287536 A JP04287536 A JP 04287536A JP 28753692 A JP28753692 A JP 28753692A JP 3140219 B2 JP3140219 B2 JP 3140219B2
- Authority
- JP
- Japan
- Prior art keywords
- sliding
- test
- sliding test
- test piece
- piece
- 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 - Fee Related
Links
Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、主として自動車軽量化
素材として使用される鋼板やアルミニウム合金板のプレ
ス成形性評価方法の一つである摺動性の試験方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for testing slidability, which is one of the methods for evaluating the press formability of steel sheets and aluminum alloy sheets mainly used as materials for reducing the weight of automobiles.
【０００２】[0002]
【従来の技術】地球温暖化に伴う省エネルギやCO2 問題
から、自動車の軽量化が積極的に推進されているが、そ
のなかでも大きな軽量化が期待できる高張力鋼板やアル
ミニウム合金板が大きな注目を集めている。しかしなが
ら、前述の材料は従来使用されてきた軟鋼板に比較して
成形性が大きく劣るため、採用に際しては大きな問題と
なっている。 2. Description of the Related Art Lightening of automobiles has been actively promoted due to energy saving and CO2 problems associated with global warming. Among them, high-strength steel sheets and aluminum alloy sheets, which can be expected to greatly reduce weight, are large. Attracting attention. However, the above-mentioned materials are significantly inferior in formability as compared with conventionally used mild steel sheets, and thus pose a serious problem when employed.
【０００３】特にアルミニウム合金板は成形性が軟鋼板
に比較して大きく劣っている。これはアルミニウム板の
特性の中でも延性が鋼板に比較して非常に低いことと、
さらに表面が柔らかいためにプレス成形時に金型とアル
ミニウム板がかじり易いためである。すなわち、金型と
材料との摺動抵抗が高いためである。このことは、高張
力鋼板においても発生し、材料表面の摺動性をいかに改
善するかは成形性を改善する上で大きな問題である。In particular, the formability of an aluminum alloy sheet is significantly inferior to that of a mild steel sheet. This means that among the properties of aluminum sheets, ductility is very low compared to steel sheets,
Further, because the surface is soft, the mold and the aluminum plate are apt to bite during press molding. That is, the sliding resistance between the mold and the material is high. This also occurs in a high-tensile steel sheet, and how to improve the slidability of the material surface is a major problem in improving the formability.
【０００４】一般には、前記材料の摺動試験装置として
図３に示すような装置がある。その装置は摺動金具２に
一定の押さえ圧力（荷重N ）を掛けて試験片１を押さえ
ながら、試験片１を摺動試験片固定治具３で固定して一
定速度で引抜き、荷重 Pと押さえ荷重 Nから式におけ
る摩擦荷重μを求めるものである。 μ＝P/N/2 ─── この摺動試験装置に使用する摺動試験片としては、従来
は短冊形状のものが使用されており、試験条件に応じて
多数の試験片が作成され試験されている。[0004] Generally, there is an apparatus as shown in FIG. 3 as a sliding test apparatus for the material. In this apparatus, the test piece 1 is fixed by a sliding test piece fixing jig 3 and pulled out at a constant speed while pressing the test piece 1 by applying a certain pressing pressure (load N) to the sliding metal fitting 2, and the load P is applied. The friction load μ in the equation is obtained from the holding load N. μ = P / N / 2 摺 動 As the sliding test piece used in this sliding test apparatus, a strip-shaped one has been used conventionally, and a large number of test pieces are prepared according to the test conditions. Have been.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら材料の摺
動性の評価は非常に困難である。なぜなら材料の摺動特
性は成形条件で大きく変化するために、幅広い条件下で
の試験が必要で、試験条件に応じて種々の形状の試験片
を多数必要とし、試験には膨大な時間と費用がかかると
いう問題がある。However, it is very difficult to evaluate the slidability of a material. Because the sliding properties of materials vary greatly with molding conditions, tests under a wide range of conditions are required, and a large number of test pieces of various shapes are required according to the test conditions. There is a problem that it takes.
【０００６】本発明は、前記課題を解決した摺動試験方
法を提供することを目的とする。An object of the present invention is to provide a sliding test method that solves the above-mentioned problems.
【０００７】[0007]
【課題を解決するための手段】本発明は、摺動金具を用
いて金属板を摺動試験する方法において、摺動方向に左
右対称形状をなし、該摺動方向にテーパ状である摺動試
験片を用い、１つの試験片で広巾から狭巾まで巾を変化
させて、１回の摺動で異なる面圧での試験を行うことを
特徴とする摺動試験方法であり、また、前記テーパ状で
ある摺動試験片に代えて、前記摺動試験に用いる摺動試
験片を、摺動方向に左右対称形状をなし、該摺動方向に
段階的に巾を変化させ、段階状の各ステップの長さが摺
動金具の接触長さの２倍以上である段付摺動試験片とす
ることを特徴とする摺動試験方法である。According to the present invention, there is provided a method of sliding test of a metal plate using a sliding metal fitting, wherein the sliding plate has a symmetrical shape in the sliding direction and a tapered shape in the sliding direction. Using a test piece , the width changes from wide to narrow with one test piece
By a sliding test method and performing tests on different surface pressure in a single slide, and in the tapered
Instead of a certain sliding test piece, the sliding test piece used in the sliding test is formed in a symmetrical shape in the sliding direction, and the width is changed stepwise in the sliding direction. to length and at least twice a stepped sliding test piece of the contact length of the sliding bracket
A sliding test method characterized by that.
【０００８】[0008]
【作用】本発明の摺動試験片については、先ず、試験片
の形状がテーパ状であるために、一定荷重での加圧にも
かかわらず、面圧の変化に伴う摩擦係数の連続的測定が
１本の試験片で可能になる。また、段付摺動試験片を用
いると、ステップ毎に面圧の異なるデータの採取が可能
になる。なお、ステップの長さは、試験精度を確保する
ために、摺動金具の２倍以上の長さが必要である。摺動
方向は広幅から狭幅に行うことで材料の変形が抑制さ
れ、短冊試験では測定ができない高面圧下での測定が可
能になる。また、この試験方法では同一試験片において
異なる面圧での摺動性面の観察が容易にできるという大
きな利点もある。With respect to the sliding test piece of the present invention, first, since the shape of the test piece is tapered, continuous measurement of the friction coefficient accompanying a change in the surface pressure despite the pressurization under a constant load. Is possible with one test piece. When a stepped sliding test piece is used, it is possible to collect data having different surface pressures for each step. The length of the step needs to be at least twice the length of the sliding bracket in order to ensure the test accuracy. By changing the sliding direction from a wide width to a narrow width, deformation of the material is suppressed, and measurement under a high surface pressure, which cannot be measured by the strip test, becomes possible. In addition, this test method also has a great advantage that it is easy to observe the slidability surface of the same test piece at different surface pressures.
【０００９】[0009]
【実施例】摺動試験の実施にあたって使用した供試材
は、全て板厚1.0mm で、5000系のAl-Mg 合金、軟鋼板
（SPCC相当) および引張強さが600MPAの高張力鋼板であ
り、その表面はすべてダル仕上とした。各材料から図１
(a) に示すテーパ形状摺動試験片を用いて図２(a) のよ
うに連続的に引抜き荷重を変化させた。また図１(b) に
示す５段付摺動試験片を加工し、図２(b) に示すように
ステップ毎に引抜き荷重を変化させて摺動試験を行っ
た。以上の結果を表１に示す。[Examples] The test materials used in the sliding test were all high-strength steel plates with a thickness of 1.0 mm, Al-Mg alloy of 5000 series, mild steel plate (equivalent to SPCC), and a tensile strength of 600 MPa. The surface was all dull finish. Figure 1 from each material
Using the tapered sliding test piece shown in (a), the drawing load was continuously changed as shown in FIG. 2 (a). Further, a sliding test specimen with five steps shown in FIG. 1 (b) was processed, and a sliding test was performed by changing the pulling load for each step as shown in FIG. 2 (b). Table 1 shows the above results.
【００１０】ここで図１(b) に示す段付摺動試験片のス
テップ長さｌは摺動金具幅ｌ0 の２倍の長さとした。な
お、比較のために従来の短冊状の摺動試験片を用いて同
一条件での試験を行い同表に併せて示した。[0010] and wherein step length l of the stepped sliding test piece shown in FIG. 1 (b) the length of twice the sliding bracket width l 0. For comparison, a test was performed under the same conditions using a conventional strip-shaped sliding test piece, and the results are shown in the same table.
【００１１】[0011]
【表１】 [Table 1]
【００１２】この表に示すように、摺動試験における本
発明の摺動試験片はいずれも従来の摺動試験片に比較し
て良好であることがわかる。なお、高速の試験において
も本発明の摺動試験片の優位性が証明された。また、同
一摺動試験片において異なる面圧での摺動面の観察もで
きる。As shown in this table, it can be seen that the sliding test pieces of the present invention in the sliding test are all better than the conventional sliding test pieces. The superiority of the sliding test piece of the present invention was proved even in a high-speed test. In addition, it is possible to observe the sliding surface of the same sliding test piece at different surface pressures.
【００１３】[0013]
【発明の効果】以上説明したように、金属板の摺動試験
において、本発明の摺動試験片を使用することにより多
数の摺動試験片を必要とせず、従来の試験時間が大幅に
短縮され、しかも幅広い条件下での試験が可能となる。As described above, in the sliding test of a metal plate, by using the sliding test piece of the present invention, a large number of sliding test pieces are not required, and the conventional test time is greatly reduced. Test under a wide range of conditions.
【図１】(a) テーパ形状摺動試験片の平面図である。 (b) 段付摺動試験片の平面図である。FIG. 1 (a) is a plan view of a tapered sliding test piece. (b) It is a top view of a stepped sliding test piece.
【図２】(a) テーパ形状摺動試験片を使用した摺動試験
チャート模式図である。 (b) ５段階の段付摺動試験片を使用した摺動試験チャー
ト模式図である。FIG. 2 (a) is a schematic view of a sliding test chart using a tapered sliding test piece. (b) A schematic diagram of a sliding test chart using a five-stage stepped sliding test piece.
【図３】摺動試験の説明図である。FIG. 3 is an explanatory diagram of a sliding test.
１ 摺動試験片 ２ 摺動金具 ３ 摺動試験片固定治具 ｌ 段付摺動試験片のステップの長さ ｌ0 摺動金具の幅DESCRIPTION OF SYMBOLS 1 Sliding test piece 2 Sliding fitting 3 Sliding test piece fixing jig l Step length of stepped sliding test piece l 0 Width of sliding fitting
フロントページの続き (72)発明者 宮崎 明 千葉県千葉市中央区川崎町１番地 川崎 製鉄株式会社 技術研究本部内 (72)発明者 上野 宏昭 千葉県千葉市中央区川崎町１番地 川崎 製鉄株式会社 技術研究本部内 (56)参考文献 特開 平２−173547（ＪＰ，Ａ) 実開 昭63−137849（ＪＰ，Ｕ) 実開 昭59−127155（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 19/02 ＪＩＣＳＴファイル（ＪＯＩＳ)Continuing on the front page (72) Inventor Akira Miyazaki 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Engineering Co., Ltd. (72) Inventor Hiroaki Ueno 1-Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Corporation (56) References JP-A-2-13747 (JP, A) JP-A-6-1337849 (JP, U) JP-A-59-127155 (JP, U) (58) Fields surveyed (Int .Cl. 7 , DB name) G01N 19/02 JICST file (JOIS)
Claims (2)
方法において、摺動方向に左右対称形状をなし、該摺動
方向にテーパ状である摺動試験片を用い、１つの試験片
で広巾から狭巾まで巾を変化させて、１回の摺動で異な
る面圧での試験を行うことを特徴とする摺動試験方法。1. A method of sliding test the metal plate using a sliding bracket, forms a symmetrical shape in the sliding direction, using a sliding test piece is tapered in the sliding direction, one test The width is changed from wide to narrow with one piece ,
A sliding test method characterized by performing a test at a constant surface pressure .
て、前記摺動試験に用いる摺動試験片を、摺動方向に左
右対称形状をなし、該摺動方向に段階的に巾を変化さ
せ、段階状の各ステップの長さが摺動金具の接触長さの
２倍以上である段付摺動試験片とすることを特徴とする
請求項１記載の摺動試験方法。Wherein instead of the sliding test pieces is the tapered
The sliding test piece used in the sliding test is formed in a symmetrical shape in the sliding direction, and the width is changed stepwise in the sliding direction. 2. The sliding test method according to claim 1 , wherein the sliding test piece is a stepped sliding test piece having a contact length twice or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04287536A JP3140219B2 (en) | 1992-10-26 | 1992-10-26 | Sliding test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04287536A JP3140219B2 (en) | 1992-10-26 | 1992-10-26 | Sliding test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06138020A JPH06138020A (en) | 1994-05-20 |
| JP3140219B2 true JP3140219B2 (en) | 2001-03-05 |
Family
ID=17718616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04287536A Expired - Fee Related JP3140219B2 (en) | 1992-10-26 | 1992-10-26 | Sliding test method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3140219B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4677804B2 (en) * | 2005-03-16 | 2011-04-27 | Ｊｆｅスチール株式会社 | Method for evaluating squeezing property of press mold and test apparatus therefor |
-
1992
- 1992-10-26 JP JP04287536A patent/JP3140219B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06138020A (en) | 1994-05-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |