JP2004050189A - Different thickness tailored blank material - Google Patents
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Abstract
Description
【０００１】
【技術分野】
本発明は，プレス成形に供されるブランク材であって，部分的に板厚又は材質の異なるアルミニウム合金よりなるテーラードブランク材に関する。
【０００２】
【従来技術】
近年，地球環境保護および省エネルギーの観点から，特に自動車関連では排出する有害ガスの抑制，地球温暖化を引き起こすとされる二酸化炭素の抑制および燃費向上が急務となっている。
これらの諸問題を解決する一つの方策としては，車体の軽量化が有効であり，特にボディおよび部品等に従来から使用されている鋼を軽量材であるアルミニウム合金ヘ置換することが盛んに検討されている。
アルミニウム合金のなかでも，ＪＩＳ規格における６０００系アルミニウム合金は熱処理により高強度化が可能なため，板厚の薄肉化による軽量材として注目されている。
更には，素材を可能な限り節約し，部材の適材適所を図る試みも同時に検討されており，特に板厚の異なる板あるいは材質の異なる板を接合し，プレス成形に供するテーラードブランクの考え方が自動車の軽量化による燃費向上には有効な手段とされている。
【０００３】
【解決しようとする課題】
ところで，複数のアルミニウム合金板を用いてテーラードブランク材を製造する場合，アルミニウム合金板同士の接合方法として各種の溶接方法が考えられる。しかし，例えばレーザ溶接では，レーザの反射率が高く表面状態によるばらつきが大きいので，溶け込み深さが不安定になったり，接合部にブローホールが生じやすいなど，健全で安定した継ぎ手が得られない。また，レーザ溶接の場合には，突き合わせ面の隙間（ギャップ）管理が厳しく，施工上の難しさもある。
【０００４】
また，マッシュシーム溶接をアルミニウム合金に適用した場合には，熱が逃げやすいので局部的な溶融しか得られない。そのため，プレス成形に耐え得る滑らかな表面性状や強度を有する継ぎ手を得ることが困難である。またマッシュシーム溶接では，接合材のかすが円盤状の電極部に付着することによってその電極の寿命が短くなってしまい，安定した溶接を続けることが困難である。
【０００５】
一方，入熱が少なく，軟化や歪みの程度が軽い接合方法として，特許第２７１２８３８号公報などにアルミニウム合金の突き合わせ摩擦撹拌接合方法（ＦＳＷ（Ｆｒｉｃｔｉｏｎ Ｓｔｉｒ Ｗｅｌｄｉｎｇ））が開示されている。この方法は，硬質の裏当て材の上にアルミニウム合金板を突き合わせて拘束し，肩面からピン状に突出させた突起部を有する回転工具を用い，これを高速回転させながら突き合わせ部分に上記突起部を差し込み，移動させる方法である。この摩擦撹拌接合方法は，アルミニウム合金を溶融させることなく接合部を得ることができ，鋼より軟らかく融点が低いアルミニウム合金の接合に非常に適している。
【０００６】
しかしながら，アルミニウム合金を上記摩擦撹拌接合により接合して得られたテーラードブランク材においては，その接合時に生じる熱の影響を受けて接合部近傍にＨＡＺ（Ｈｅａｔ Ａｆｆｅｃｔｅｄ Ｚｏｎｅ）を生じ，軟化することは避けがたい。そして，このＨＡＺ軟化部を有するテーラードブランク材においては，プレス加工時において上記ＨＡＺ軟化部が優先的に破断する場合がある。特に上記アルミニウム合金が６０００系アルミニウム合金である場合には，上記傾向が顕著に表れる。そのため，従来，６０００系アルミニウム合金よりなるテーラードブランク材においては，このＨＡＺ軟化部を解消するには，プレス加工前においてテーラードブランク材に後熱処理を施す必要があるが，その場合は生産性およびコストのみならず，後熱処理による歪み発生等の問題を有していた。
【０００７】
本発明はかかる従来の問題点に鑑みてなされたもので，ＨＡＺ軟化部による影響を抑制することができる差厚テーラードブランク材を提供しようとするものである。
【０００８】
【課題の解決手段】
本発明は，主板材と，板厚が上記主板材よりも薄い副板材とを接合してなる，プレス成形用の差厚テーラードブランク材において，
上記主板材は，ＪＩＳ−６０００系アルミニウム合金よりなり，
上記副板材は，上記主板材と異なる成分組成を有するＪＩＳ−６０００系アルミニウム合金よりなり，
上記主板材と上記副板材とは，摩擦撹拌接合により突き合わせ接合されており，
かつ，上記副板材の引張強さが上記主板材よりも高いことを特徴とする差厚テーラードブランク材にある（請求項１）。
【０００９】
本発明の差厚テーラードブランク材は，上記主板材と副板材の材質を同系統のＪＩＳ−６０００系とする一方，具体的な成分組成は異なるものとし，引張強さに代表される強度を積極的に異なるように設定する。そして，強度の高い方の副板材の板厚を，強度の低い方の主板材の板厚よりも小さくする。また，これら主板材と副板材とは，摩擦撹拌接合により突き合わせ接合する。
このような構成を採用することによって，６０００系のアルミニウム合金同士を接合してなるテーラードブランク材におけるＨＡＺ軟化部による影響を抑制することができるのである。
【００１０】
即ち，上記摩擦撹拌接合時の熱によって生じるＨＡＺ軟化部の発生は，摩擦撹拌接合を採用する限り防止することは困難である。そして，従来の差厚テーラードブランク材においては，板厚は異なるが材質が同じ板材同士を接合して作製していたので，自ずと，板厚の薄い方のＨＡＺ軟化部が最も強度が低く応力集中が起こりやすく，プレス加工性を低下させていた。
【００１１】
これに対し，本発明では，上記のごとく，同じ６０００系同士ではあっても，その成分組成を異なるものとすることによって，板厚の小さい方の副板材の強度を板厚の大きい方の主板材よりも高く設定し，主板材のＨＡＺ軟化部に優先的に応力集中させることができる。そのため，板厚の小さい副板材におけるＨＡＺ軟化部の強度低下を緩和することができ，この副板材におけるＨＡＺ軟化部への応力集中を抑制することができる。
それ故，本発明の差厚テーラードブランク材は，たとえ後熱処理を行わなくても，優れたプレス成形性を得ることができる。
【００１２】
【発明の実施の形態】
本発明における上記主板材および副板材の材質としては，ＪＩＳ規格における６０００系の様々なアルミニウム合金を適用することができる。代表例としては，Ａ６０６３，Ａ６０６１，Ａ６Ｎ０１等がある。
また，これらの合金の調質は，車体に必要な強度とするために，Ｔ４，Ｔ５又はＴ６が好ましい。
【００１３】
また，上記主板材の板厚をＴ１（ｍｍ），上記副板材の板厚をＴ２（ｍｍ），上記主板材の引張強さをＫ１（ＭＰａ），上記副板材の引張強さをＫ２（ＭＰａ）とした場合，
Ｔ１／Ｔ２＞１，Ｋ２／Ｋ１＞１でかつ（Ｔ１／Ｔ２）２−（Ｋ２／Ｋ１）＞０の関係を満たすことが好ましい（請求項２）。
【００１４】
Ｔ１／Ｔ２＞１，Ｋ２／Ｋ１＞１は，主板材の方が副板材より厚く，副板材の引張強さの方が主板材の引張強さより高いという本発明の請求項１を関係式にしたものである。
（Ｔ１／Ｔ２）２−（Ｋ２／Ｋ１）≦０
となった場合には，板厚比と強度比のバランスにおいて，板厚の小さい副板材のＨＡＺ軟化部に応力集中しやすいという問題がある。
【００１５】
また，上記主板材と上記副板材との接合部を中央部に有する試験片により引張試験を実施した場合に，その破断位置が，上記主板材の部分となることが好ましい（請求項３）。この場合には，従来の６０００系アルミニウム合金よりなる差厚テーラードブランク材での，薄板側のＨＡＺ部を起点として割れやすい欠点をより確実に解消することができる。そのため，プレス成形性を更に向上させることができる。
【００１６】
また，上記差厚テーラードブランク材は，自動車用プレス材に用いられることが好ましい（請求項４）。
自動車用プレス材としては，例えば，自動車の内外装パネル，シャシー用プレス材など種々の材料がある。これらの自動車用プレス材においては，デザインによって様々なプレス加工が必要となるので，上記差厚テーラードブランク材の安定したプレス加工性がプレス加工品の性能の向上等に貢献することができる。
【００１７】
【実施例】
本発明の実施例に係る差厚テーラードブランク材につき，図１を用いて説明する。
本例では，本発明品としての４種類の差厚テーラードブランク材（試料Ｅ１〜Ｅ４）と，比較品としての２種類の差厚テーラードブランク材（試料Ｃ１，Ｃ２）を作製し，プレス成形時の破断特性について調べた。
【００１８】
まず，本発明品としての試料Ｅ１は，図１に示すごとく，主板材２と，板厚が上記主板材２よりも薄い副板材３とを接合してなる，プレス成形用の差厚テーラードブランク材である。
上記主板材２は，ＪＩＳ Ａ６０６３−Ｔ４材よりなり，その板厚は２ｍｍである。
上記副板材３は，上記主板材２と異なる成分組成を有するＪＩＳ−６０００系アルミニウム合金，具体的にはＪＩＳ Ａ６０６１−Ｔ４材よりなり，その板厚は１ｍｍである。
そして，副板材３の引張強さは２４０ＭＰａであり，主板材２の引張強さは１７２ＭＰａであり，副板材３の方が引張強さが高くなっている。
【００１９】
また，主板材２と副板材３とは，図１，図２に示すごとく摩擦撹拌接合により突き合わせ接合されている。
この摩擦撹拌接合を行うに当たっては，図２に示すごとく，まず主板材２と副板材３とを突き合わせる。
次に，同図に示すごとく，肩面５０と該肩面５０から突出させた突起部５２とを先端に有する硬質の回転工具５を用い，これをを回転させながら突起部５２を，突き合わせ部に差し込む。そして，主板材２，副板材３を摩擦熱を発生させた状態で撹拌し，回転工具５を突き合わせ部に沿って移動させる。
【００２０】
これにより，主板材２と副板材３とが摩擦撹拌接合により接合され，上記撹拌域よりなる接合部１５が形成される。
そして，得られた差厚テーラードブランク材１においては，接合部の近傍の母材に上述したＨＡＺ軟化部９２，９３が形成されている。
【００２１】
次に，試料Ｅ２は，主板材２の板厚を１．２ｍｍに変更した以外は試料Ｅ１と同様の構成である。また，この場合の主板材３の引張強度は１７０ＭＰａである。
次に，試料Ｅ３は，副板材３の材質をＪＩＳ Ａ６０６１−Ｔ６に変更した以外は試料Ｅ１と同様の構成である。また，この場合の副板材３の引張強さは３０９ＭＰａである。
次に，試料Ｅ４は，主板材２の板厚を１．４ｍｍに変更した以外は試料Ｅ３と同様の構成である。また，この場合の主板材２の引張強さは１７２ＭＰａである。
また，試料Ｃ１は，主板材２の板厚を１．１ｍｍ，材質をＡ６０６１−Ｔ４に変更し，かつ副板材３の材質をＡ６０６３−Ｔ４に変更したものである。また，この場合の主板材２の引張強さは２３５ＭＰａ，副板材３の引張強さは１７２ＭＰａである。
また，試料Ｃ２は，副板材３の材質をＪＩＳ Ａ６０６３−Ｔ４と主板材２と同じにした以外は試料Ｅ１と同様の構成である。また，この場合の副板材３の引張強さは１７２ＭＰａである。
【００２２】
次に，上記７種類の試料Ｅ１〜Ｅ４，Ｃ１，Ｃ２を用いて，接合部が中央に来るようにＪＩＳ５号引張試験片を切り出して，引張試験を行った。
その結果を表１に示す。
また，主板材の板厚をＴ１（ｍｍ），副板材の板厚をＴ２（ｍｍ），上記主板材の引張強さをＫ１（ＭＰａ），上記副板材の引張強さをＫ２（ＭＰａ）とした場合の関係式
Ｔ１／Ｔ２，Ｋ２／Ｋ１，（Ｔ１／Ｔ２）２−（Ｋ２／Ｋ１）
から得られる値をそれぞれ求め，表１に併せて記載した。
【００２３】
【表１】
表１より知られるごとく，本発明品である試料Ｅ１〜Ｅ４は，いずれも破断伸びが高く，かつ，破断位置はすべて板厚の厚い主板材２のＨＡＺ軟化部９２となっていた。
一方，比較品である試料Ｃ１，Ｃ２においては，破断伸びが小さく，かつ，破断位置は板厚の薄い副板材３のＨＡＺ軟化部９３となっていた。
【００２５】
この結果から，本発明品である試料Ｅ１〜Ｅ４は，比較品である試料Ｃ１，Ｃ２に比べて，加工度の高いプレス加工にも耐えうる優れたテーラードブランク材であることがわかる。
【図面の簡単な説明】
【図１】実施例における，差厚テーラードブランク材を示す説明図。
【図２】実施例における，差厚テーラードブランク材を摩擦撹拌接合する方法を示す説明図。
【符号の説明】
１．．．差厚テーラードブランク材，
１５．．．接合部，
２．．．主板材，
３．．．副板材，
５．．．回転工具，
５０．．．肩面，
５２．．．突起部，[0001]
【Technical field】
TECHNICAL FIELD The present invention relates to a blank material to be subjected to press forming, and more particularly to a tailored blank material partially made of an aluminum alloy having a different thickness or material.
[0002]
[Prior art]
In recent years, from the viewpoints of global environmental protection and energy saving, it is urgently necessary to suppress harmful gases emitted, particularly in the automotive field, to suppress carbon dioxide, which is considered to cause global warming, and to improve fuel efficiency.
One solution to these problems is to reduce the weight of the vehicle body. In particular, the replacement of steel, which has been conventionally used for the body and parts, with an aluminum alloy, which is a lightweight material, has been actively studied. Have been.
Among aluminum alloys, 6000-series aluminum alloys according to the JIS standard can be increased in strength by heat treatment, and thus are attracting attention as lightweight materials by reducing the thickness of the sheet.
Attempts have also been made to attempt to save material as much as possible and to find the right material in the right place. Particularly, the idea of tailored blanks that join plates of different thicknesses or plates of different materials and provide them for press forming has been developed for automobiles. This is an effective means for improving fuel efficiency by reducing the weight of the vehicle.
[0003]
[Problem to be solved]
When a tailored blank is manufactured using a plurality of aluminum alloy plates, various welding methods can be considered as a method for joining the aluminum alloy plates. However, in laser welding, for example, the laser reflectivity is high and the variation in the surface condition is large, so that a sound and stable joint cannot be obtained, for example, the penetration depth becomes unstable or blowholes are easily formed in the joint. . In the case of laser welding, the gap between the butted surfaces is strictly controlled, and there is a difficulty in the construction.
[0004]
In addition, when mash seam welding is applied to an aluminum alloy, heat can easily escape, and only local melting can be obtained. Therefore, it is difficult to obtain a joint having smooth surface properties and strength that can withstand press forming. Also, in mash seam welding, the residue of the joining material adheres to the disk-shaped electrode portion, thereby shortening the life of the electrode, making it difficult to maintain stable welding.
[0005]
On the other hand, Japanese Patent No. 2712838 and the like disclose a friction stir welding (FSW) method of aluminum alloy (FSW (Friction Stir Welding)) as a welding method with low heat input and a low degree of softening and distortion. This method uses a rotating tool that has a projection that projects from the shoulder surface in a pin-like manner by holding an aluminum alloy plate against a hard backing material and restraining the aluminum alloy plate. This is a method of inserting and moving a part. This friction stir welding method can obtain a joint without melting the aluminum alloy, and is very suitable for joining an aluminum alloy which is softer than steel and has a lower melting point.
[0006]
However, in a tailored blank material obtained by joining an aluminum alloy by the above-mentioned friction stir welding, a heat-affected zone (HAZ) is generated in the vicinity of the joint due to the influence of heat generated during the joining, and softening is avoided. It is hard. In the tailored blank having the HAZ softened portion, the HAZ softened portion may be preferentially broken during press working. In particular, when the aluminum alloy is a 6000 series aluminum alloy, the above tendency is remarkably exhibited. For this reason, conventionally, in a tailored blank made of a 6000 series aluminum alloy, it is necessary to perform a post heat treatment on the tailored blank before press working in order to eliminate the HAZ softened portion. In addition, there is a problem that distortion occurs due to the post heat treatment.
[0007]
The present invention has been made in view of such a conventional problem, and has as its object to provide a differential thickness tailored blank material that can suppress the influence of the HAZ softening portion.
[0008]
[Means for solving the problem]
The present invention relates to a tailored blank material for press forming, comprising a main plate and a sub-plate having a smaller thickness than the main plate.
The main plate is made of JIS-6000 series aluminum alloy,
The sub-plate is made of a JIS-6000 aluminum alloy having a composition different from that of the main plate.
The main plate and the sub plate are butt-joined by friction stir welding.
Further, there is provided a tailored blank having a different thickness, wherein the tensile strength of the sub-plate is higher than that of the main plate.
[0009]
In the differential thickness tailored blank material of the present invention, the material of the main plate material and the sub plate material is the same JIS-6000 system, but the specific component composition is different, and the strength represented by the tensile strength is positive. Set differently. Then, the plate thickness of the sub plate having the higher strength is made smaller than the plate thickness of the main plate having the lower strength. The main plate and the sub plate are butt-joined by friction stir welding.
By adopting such a configuration, it is possible to suppress the influence of the HAZ softened portion in the tailored blank material formed by joining 6000 series aluminum alloys.
[0010]
That is, it is difficult to prevent the generation of the HAZ softened portion caused by the heat during the friction stir welding as long as friction stir welding is employed. In the conventional tailored blank with a different thickness, the thickness of the HAZ softened portion is smaller than that of the other HAZ softened portion because the thickness of the HAZ softened portion is lower than that of the other. Easily occurred, and the press workability was reduced.
[0011]
On the other hand, in the present invention, as described above, even if the 6000 series are the same, the strength of the sub-plate having the smaller thickness is increased by making the component composition different. The stress can be preferentially concentrated on the HAZ softened portion of the main plate material by setting it higher than the material. Therefore, it is possible to alleviate a decrease in strength of the HAZ softened portion in the sub-plate material having a small plate thickness, and it is possible to suppress concentration of stress on the HAZ softened portion in the sub-plate material.
Therefore, the differential thickness tailored blank of the present invention can obtain excellent press formability even without performing post-heat treatment.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
As the material of the main plate material and the sub plate material in the present invention, various aluminum alloys of 6000 series in JIS standard can be applied. Representative examples include A6063, A6061 and A6N01.
The tempering of these alloys is preferably T4, T5 or T6 in order to obtain the strength required for the vehicle body.
[0013]
The thickness of the main plate is T1 (mm), the thickness of the sub-plate is T2 (mm), the tensile strength of the main plate is K1 (MPa), and the tensile strength of the sub-plate is K2 (MPa). ),
It is preferable that T1 / T2> 1, K2 / K1> 1 and satisfy the relationship of (T1 / T2) 2- (K2 / K1)> 0 (claim 2).
[0014]
T1 / T2> 1 and K2 / K1> 1 indicate that the main plate is thicker than the sub-plate and that the tensile strength of the sub-plate is higher than the tensile strength of the main plate. It was done.
(T1 / T2) 2 − (K2 / K1) ≦ 0
When there is a problem, there is a problem that stress tends to concentrate on the HAZ softened portion of the sub-plate material having a small plate thickness in the balance between the plate thickness ratio and the strength ratio.
[0015]
Further, when a tensile test is carried out using a test piece having a joint portion between the main plate material and the sub-plate material at a central portion, it is preferable that the breaking position be the portion of the main plate material. In this case, it is possible to more reliably solve the problem that the conventional thinned tailored blank made of the 6000 series aluminum alloy is easily cracked from the HAZ portion on the thin plate side as a starting point. Therefore, press formability can be further improved.
[0016]
It is preferable that the differential thickness tailored blank material is used for an automotive press material.
As the press material for automobiles, for example, there are various materials such as interior and exterior panels of automobiles and press materials for chassis. In these automotive press materials, various press workings are required depending on the design, and therefore, the stable press workability of the differential thickness tailored blank material can contribute to the improvement of the performance of the pressed product and the like.
[0017]
【Example】
A differential thickness tailored blank according to an embodiment of the present invention will be described with reference to FIG.
In this example, four types of differential thickness tailored blanks (samples E1 to E4) as the product of the present invention and two types of differential thickness tailored blanks (samples C1 and C2) as comparative products were prepared and subjected to press molding. Was examined for the breaking characteristics.
[0018]
First, as shown in FIG. 1, a sample E1 as a product of the present invention is a differential thickness tailored blank for press forming which is formed by joining a
The
The
The tensile strength of the
[0019]
The
In performing the friction stir welding, the
Next, as shown in the drawing, a
[0020]
Thus, the
In the tailored
[0021]
Next, the sample E2 has the same configuration as the sample E1 except that the thickness of the
Next, the sample E3 has the same configuration as the sample E1 except that the material of the
Next, the sample E4 has the same configuration as that of the sample E3 except that the thickness of the
In sample C1, the plate thickness of the
The sample C2 has the same configuration as the sample E1 except that the material of the
[0022]
Next, a JIS No. 5 tensile test piece was cut out from the seven types of samples E1 to E4, C1, and C2 so that the joint was located at the center, and a tensile test was performed.
Table 1 shows the results.
The thickness of the main plate is T1 (mm), the thickness of the sub plate is T2 (mm), the tensile strength of the main plate is K1 (MPa), and the tensile strength of the sub plate is K2 (MPa). T1 / T2, K2 / K1, (T1 / T2) 2- (K2 / K1)
The values obtained from Table 1 were determined and are also shown in Table 1.
[0023]
[Table 1]
As can be seen from Table 1, all of the samples E1 to E4 of the present invention had a high elongation at break, and the breaking positions were all HAZ softened
On the other hand, in the comparative samples C1 and C2, the breaking elongation was small and the breaking position was the HAZ softened
[0025]
From these results, it can be seen that the samples E1 to E4 of the present invention are excellent tailored blank materials that can withstand high-pressing work compared to the samples C1 and C2 of the comparative products.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a differential thickness tailored blank material in an embodiment.
FIG. 2 is an explanatory view showing a method of friction stir welding of a tailored blank having a different thickness in an embodiment.
[Explanation of symbols]
1. . . Different thickness tailored blanks,
15. . . Joint,
2. . . Main plate,
3. . . Vice plate,
5. . . Rotating tools,
50. . . Shoulder,
52. . . protrusion,
Claims (4)
上記主板材は，ＪＩＳ−６０００系アルミニウム合金よりなり，
上記副板材は，上記主板材と異なる成分組成を有するＪＩＳ−６０００系アルミニウム合金よりなり，
上記主板材と上記副板材とは，摩擦撹拌接合により突き合わせ接合されており，
かつ，上記副板材の引張強さが上記主板材よりも高いことを特徴とする差厚テーラードブランク材。In a tailored blank for press forming, which is made by joining a main plate and a sub-plate whose thickness is smaller than the main plate,
The main plate is made of JIS-6000 series aluminum alloy,
The sub-plate is made of a JIS-6000 aluminum alloy having a composition different from that of the main plate.
The main plate and the sub plate are butt-joined by friction stir welding.
A differential thickness tailored blank, wherein the tensile strength of the sub-plate is higher than that of the main plate.
Ｔ１／Ｔ２＞１，Ｋ２／Ｋ１＞１でかつ（Ｔ１／Ｔ２）２−（Ｋ２／Ｋ１）＞０の関係を満たすことを特徴とする差厚テーラードブランク材。2. The method according to claim 1, wherein the thickness of the main plate is T1 (mm), the thickness of the sub-plate is T2 (mm), the tensile strength of the main plate is K1 (MPa), and the tensile strength of the sub-plate is When K2 (MPa),
A differential thickness tailored blank material characterized by satisfying a relationship of T1 / T2> 1, K2 / K1> 1 and (T1 / T2) 2- (K2 / K1)> 0.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005125341A (en) * | 2003-10-22 | 2005-05-19 | Sumitomo Light Metal Ind Ltd | Aluminum blank material for press formation |
| JP2007289984A (en) * | 2006-04-24 | 2007-11-08 | Sumitomo Light Metal Ind Ltd | Aluminum alloy joined material having excellent formability and its production method |
| CN113020915A (en) * | 2021-03-22 | 2021-06-25 | 一汽解放汽车有限公司 | Splicing forming method |
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| CN114669616A (en) | 2016-11-30 | 2022-06-28 | 爱信轻金属株式会社 | Structural member |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005125341A (en) * | 2003-10-22 | 2005-05-19 | Sumitomo Light Metal Ind Ltd | Aluminum blank material for press formation |
| JP4707317B2 (en) * | 2003-10-22 | 2011-06-22 | 住友軽金属工業株式会社 | Aluminum blank for press molding |
| JP2007289984A (en) * | 2006-04-24 | 2007-11-08 | Sumitomo Light Metal Ind Ltd | Aluminum alloy joined material having excellent formability and its production method |
| CN113020915A (en) * | 2021-03-22 | 2021-06-25 | 一汽解放汽车有限公司 | Splicing forming method |
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