JPH07299518A - Forming method for aluminum system metallic sheet - Google Patents
Forming method for aluminum system metallic sheetInfo
- Publication number
- JPH07299518A JPH07299518A JP6094125A JP9412594A JPH07299518A JP H07299518 A JPH07299518 A JP H07299518A JP 6094125 A JP6094125 A JP 6094125A JP 9412594 A JP9412594 A JP 9412594A JP H07299518 A JPH07299518 A JP H07299518A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- forming
- based metal
- temperature
- metal plate
- 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.)
- Granted
Links
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、アルミニウムまたはア
ルミニウム系合金等のアルミニウム系金属板を加熱して
圧空成形により所定の成形型に沿って超塑性成形させる
成形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 molding method in which an aluminum-based metal plate such as aluminum or an aluminum-based alloy is heated and superplastically formed along a predetermined forming die by pressure forming.
【０００２】[0002]
【従来の技術】従来、アルミニウムまたはアルミニウム
系合金等のアルミニウム系金属板を加熱し、凹型の成形
部を備え、予め加熱されている成形型に、前記成形部を
閉蓋するように配置し、圧空成形により前記アルミニウ
ム系金属板を前記成形部に沿って超塑性成形させるアル
ミニウム系金属板の成形方法が知られている。前記のよ
うなアルミニウム系金属板の圧空成形方法は例えば、特
公昭４４−２６１７８号公報に記載されている。2. Description of the Related Art Conventionally, an aluminum-based metal plate such as aluminum or an aluminum-based alloy is heated and provided with a recessed molding portion, and the molding portion is placed in a preheated molding die so as to close the molding portion, A method for forming an aluminum-based metal plate is known in which the aluminum-based metal plate is superplastically formed along the forming portion by pressure forming. The above-mentioned method for forming the aluminum-based metal sheet under pressure is described, for example, in Japanese Patent Publication No. 44-17878.
【０００３】ところが、アルミニウム系金属板を超塑性
成形することにより小型舟艇の艇体や自動二輪車の燃料
タンク等を製造しようとすると、変形量が大きく、例え
ば２００％を超えるような部分は超塑性成形されにく
く、成形されても局部的に薄くなり十分な肉厚を確保す
ることができず、空洞が著しく発生するという問題があ
る。前記問題を解決するために、例えば、特開平６−５
４５号公報に記載されたような技術が知られている。こ
れは、ステンレス鋼、アルミニウム合金、マグネシウム
合金、チタン合金、Ｔｉ−Ａｌ合金、Ｚｎ−Ａｌ合金等
の超塑性材を圧空成形してゴルフクラブヘッドを製造す
る技術であり、超塑性成形されにくい部分は前記超塑性
材を予め前記超塑性変形の伸び方向に沿って予備成形し
ておくことにより成形を容易にするものである。このよ
うにすることにより、前記変形量の大きな部分でも十分
な肉厚を確保し、製品全体の肉厚を均一にすることが考
えられる。However, when it is attempted to manufacture a hull of a small boat or a fuel tank of a motorcycle by superplastic forming an aluminum-based metal plate, the amount of deformation is large. For example, a portion exceeding 200% is superplastic. There is a problem that it is difficult to be molded, and even if it is molded, it becomes locally thin and a sufficient wall thickness cannot be ensured, and a cavity is remarkably generated. To solve the above problem, for example, Japanese Patent Laid-Open No. 6-5
The technique as described in Japanese Patent Publication No. 45 is known. This is a technology for manufacturing a golf club head by pressure forming a superplastic material such as stainless steel, an aluminum alloy, a magnesium alloy, a titanium alloy, a Ti-Al alloy, and a Zn-Al alloy. Is to facilitate forming by preforming the superplastic material in advance along the extension direction of the superplastic deformation. By doing so, it is conceivable that a sufficient thickness is secured even in the portion where the deformation amount is large and the thickness of the entire product is made uniform.
【０００４】しかしながら、ＪＩＳ規格によるＯ材のよ
うな伸び率が１６％以上になるように再結晶処理されて
いる伸び特性に優れた板材の場合には、前記のように予
備成形を施すと、該予備成形により発生する内部歪と圧
空成形時の加熱とにより結晶粒が粗大化してしまい、所
望の形状に超塑性成形が成し得ないとの不都合がある。However, in the case of a plate material having excellent elongation characteristics which has been recrystallized so that the elongation rate is 16% or more like the O material according to the JIS standard, if the preforming is performed as described above, The internal strain generated by the preforming and the heating during the pressure forming cause coarsening of the crystal grains, which causes a problem that superplastic forming cannot be performed in a desired shape.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、アルミニウ
ム系金属板の改良された成形方法を提供することを目的
とする。SUMMARY OF THE INVENTION An object of the present invention is to provide an improved method for forming an aluminum-based metal sheet.
【０００６】さらに詳しくは、本発明の目的は、アルミ
ニウムまたはアルミニウム系合金等の加熱されたアルミ
ニウム系金属板を圧空成形により成形型に沿って超塑性
成形させる成形方法の改良にある。More specifically, an object of the present invention is to improve a forming method in which a heated aluminum-based metal plate such as aluminum or an aluminum-based alloy is superplastically formed along a forming die by pressure forming.
【０００７】また、本発明の目的は、アルミニウムまた
はアルミニウム系合金等の加熱されたアルミニウム系金
属板を圧空成形により成形型に沿って超塑性成形させる
ときに、安価な材料で変形量の大きな部分でも十分な肉
厚を確保することができ、しかも優れた強度を有する製
品を得ることができるアルミニウム系金属板の成形方法
を提供することにある。Further, an object of the present invention is to use, when a heated aluminum-based metal plate such as aluminum or an aluminum-based alloy is superplastically formed along a forming die by pressure forming, a portion made of an inexpensive material and having a large deformation amount. However, it is an object of the present invention to provide a method for forming an aluminum-based metal plate, which can secure a sufficient thickness and can obtain a product having excellent strength.
【０００８】[0008]
【課題を解決するための手段】かかる目的を達成するた
めに、本発明の金属の成形方法は、アルミニウム系金属
板を加熱し、凹型の成形部を備える成形型に、該成形部
を閉蓋するように配置して、圧空成形により該金属板を
該成形部に沿って超塑性成形させる金属板の成形方法に
おいて、再結晶粒の存在しないアルミニウム系金属板を
前記超塑性変形の伸び方向に沿って予備成形する予備成
形工程と、常温から３６０〜５６０℃、好ましくは４４
０〜５４０℃の範囲の温度まで０．６℃／秒以上の速度
で昇温して急熱し、再結晶させる急熱再結晶工程と、前
記再結晶されたアルミニウム系金属板を前記圧空成形に
より超塑性成形させる圧空成形工程とからなることを特
徴とする。In order to achieve the above object, the metal forming method of the present invention comprises heating an aluminum-based metal plate and closing the forming part in a forming mold having a concave forming part. In the method for forming a metal plate in which the metal plate is superplastically formed along the forming portion by pressure forming, an aluminum-based metal plate having no recrystallized grains is formed in the elongation direction of the superplastic deformation. Along with a preforming step of preforming along with normal temperature from 360 to 560 ℃, preferably 44
A rapid heat recrystallization step of raising the temperature to a temperature in the range of 0 to 540 ° C. at a rate of 0.6 ° C./second or more to rapidly recrystallize, and the recrystallized aluminum-based metal plate by the pressure forming. It is characterized by comprising a pressure forming step of superplastic forming.
【０００９】前記急熱再結晶工程では、アルミニウム系
金属板の再結晶のために、常温から３６０乃至５６０℃
の範囲の温度まで前記範囲の速度で昇温して急熱するこ
とが好ましく、さらに好ましくは４４０〜５４０℃の範
囲が良く、前記急熱により昇温される温度が３６０℃未
満ではアルミニウム系金属板の再結晶が不十分であり、
５６０℃を超えるとアルミニウム系金属板の溶融が始ま
るので好ましくない。また、昇温速度が０．６℃／秒未
満では再結晶粒が大きくなってしまい、超塑性性能に障
害が発生する。In the rapid recrystallization process, the aluminum metal plate is recrystallized from room temperature to 360 to 560 ° C.
It is preferable to raise the temperature to a temperature in the range at a rate in the above range to rapidly heat, more preferably in the range of 440 to 540 ° C., and if the temperature raised by the rapid heat is less than 360 ° C. Insufficient recrystallization of the plate,
If the temperature exceeds 560 ° C, melting of the aluminum-based metal plate starts, which is not preferable. Further, if the heating rate is less than 0.6 ° C./sec, the recrystallized grains become large, and the superplastic performance is impaired.
【００１０】本発明の金属の成形方法では、製品の肉厚
を均一にし局部的に薄い部分ができないようにするため
に、圧空成形により成形されにくい部分を予備成形する
が、該予備成形はアルミニウム系金属板の再結晶時に結
晶粒を粗大化させないように、予備成形前の再結晶粒が
無いものを用いる。この様なものとして冷延材や、冷延
後に焼鈍処理をしたＨ２４材までが好ましい。そこで、
前記予備成形工程において、前記アルミニウム系金属板
を曲げ加工により、前記アルミニウム系金属板が延伸さ
れないように解放された状態で予備成形する。In the metal forming method of the present invention, in order to make the thickness of the product uniform and to prevent locally thin portions, the portions which are difficult to form by pressure forming are preformed. In order to prevent the crystal grains from becoming coarse during recrystallization of the metal plate, a metal plate having no recrystallization grains before preforming is used. As such a material, a cold rolled material and an H24 material which has been annealed after cold rolling are preferable. Therefore,
In the preforming step, the aluminum-based metal plate is preformed by bending the aluminum-based metal plate in a released state so as not to be stretched.
【００１１】また、本発明の金属の成形方法では、熱効
率を向上するために、前記急熱再結晶工程において、前
記予備成形されたアルミニウム系金属板を予め加熱され
ている前記成形型に配置して前記範囲の温度まで前記範
囲の速度で昇温して急熱することが好ましい。Further, in the metal forming method of the present invention, in order to improve the thermal efficiency, the preformed aluminum-based metal sheet is placed in the forming die which is preheated in the rapid thermal recrystallization step. It is preferable to raise the temperature to a temperature in the above range at a rate in the above range to rapidly heat.
【００１２】[0012]
【作用】本発明の成形方法によれば、再結晶粒の存在し
ないアルミニウム系金属板を予め前記超塑性変形の伸び
方向に沿って予備成形しておくことにより、超塑性成形
が容易になる。また、超塑性成形による変形量の大きな
部分でも十分な肉厚が確保され、製品全体の肉厚が均一
になる。前記予備成形は、曲げ加工により行うことによ
り、前記アルミニウム系金属板が延伸されず解放された
状態で予備成形されるので、内部応力の歪の発生が低減
され結晶粒が粗大化が抑制される。According to the forming method of the present invention, superplastic forming is facilitated by preforming an aluminum-based metal plate having no recrystallized grains along the extension direction of the superplastic deformation. In addition, a sufficient thickness is secured even in a portion where the amount of deformation due to superplastic forming is large, and the thickness of the entire product becomes uniform. By performing the preforming by bending, the aluminum-based metal plate is preformed in a released state without being stretched, so that the occurrence of strain of internal stress is reduced and the coarsening of crystal grains is suppressed. .
【００１３】次に、前記予備成形されたアルミニウム系
金属板を常温から３６０〜５６０℃、好ましくは４４０
〜５４０℃の範囲の温度まで０．６℃／秒以上の速度で
昇温して急熱することにより、該アルミニウム系金属板
の結晶粒が再結晶され、超塑性成形に適した特性が得ら
れる。Next, the preformed aluminum-based metal plate is heated at room temperature to 360 to 560 ° C., preferably 440.
By raising the temperature to a temperature in the range of up to 540 ° C at a rate of 0.6 ° C / sec or more and rapidly heating, the crystal grains of the aluminum-based metal plate are recrystallized, and the characteristics suitable for superplastic forming are obtained. To be
【００１４】次いで、前記急熱再結晶ののち直ちに、前
記アルミニウム系金属板を、凹型の成形部を備える成形
型に、該成形部を閉蓋するように配置して、圧空成形に
より該金属板を該成形部に沿って超塑性成形させること
により、該アルミニウム系金属板内部で空洞の発生が抑
制され、優れた強度を有する製品が得られる。Immediately after the rapid thermal recrystallization, the aluminum-based metal plate is placed in a forming die having a concave forming portion so as to close the forming portion, and the metal sheet is formed by pressure forming. By performing superplastic forming along the forming portion, generation of voids inside the aluminum-based metal plate is suppressed, and a product having excellent strength is obtained.
【００１５】また、本発明の成形方法によれば、前記急
熱再結晶工程において、前記予備成形されたアルミニウ
ム系金属板を予め加熱されている前記成形型に配置して
前記範囲の温度まで前記範囲の速度で昇温して急熱する
ことにより、熱効率が向上される。Further, according to the molding method of the present invention, in the rapid recrystallization step, the preformed aluminum-based metal sheet is placed in the pre-heated forming die and the temperature is kept within the range. The heat efficiency is improved by raising the temperature at a speed within the range and rapidly heating.
【００１６】[0016]
【実施例】次に、添付の図面を参照しながら本発明の金
属の成形方法についてさらに詳しく説明する。図１は本
実施例の成形方法の工程を概念的に示す斜視図であり、
図２は図１のＩＩ−ＩＩ線断面図である。また、図３は
本実施例の成形方法の成形工程におけるアルミニウム系
金属板の温度履歴を示すグラフである。The metal forming method of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a perspective view conceptually showing the steps of the molding method of the present embodiment,
2 is a sectional view taken along the line II-II in FIG. FIG. 3 is a graph showing the temperature history of the aluminum-based metal plate in the forming process of the forming method of this embodiment.
【００１７】本実施例では、冷間圧延により得られた伸
び率７％のアルミニウム系金属板（ＪＩＳ規格のＨ１８
材）を用いて自動二輪車の燃料タンクを製造した。In this example, an aluminum-based metal plate (equivalent to JIS standard H18) having an elongation of 7% obtained by cold rolling was used.
Material) was used to manufacture a fuel tank for motorcycles.
【００１８】先ず、図１（ａ）及び図２（ａ）に示すア
ルミニウム系金属板（Ｈ１８材）１を超塑性変形の伸び
方向に沿って予備成形し、図１（ｂ）及び図２（ｂ）に
示す予備成形体２を得る。アルミニウム系金属板１は、
厚さ２ｍｍで１０５０ｍｍ×２１５０ｍｍの大きさであ
る。前記予備成形は、後述の圧空成形で成形されにくい
部分が超塑性成形により所望の形状に成形されやすくす
ると共に、変形量の大きな部分の肉厚を確保するための
ものであり、アルミニウム系金属板１を曲げ加工するこ
とにより、延伸されず解放された状態で断面コ字状で、
変形量が最大１００％になるように予備成形された予備
成形体２が得られる。First, the aluminum-based metal plate (H18 material) 1 shown in FIGS. 1 (a) and 2 (a) is preformed along the extension direction of superplastic deformation, and FIGS. The preform 2 shown in b) is obtained. The aluminum-based metal plate 1 is
The size is 2 mm and the size is 1050 mm × 2150 mm. The preforming is for ensuring that the portion that is difficult to be formed by the below-described pressure forming is easily formed into a desired shape by superplastic forming, and that the thickness of the portion having a large amount of deformation is large. By bending 1 No. 1, it has a U-shaped cross section in a released state without being stretched,
The preformed body 2 preformed so that the deformation amount becomes 100% at maximum can be obtained.
【００１９】前記予備成形では、アルミニウム系金属板
１に内部応力の発生が避けられないが、前記のようにア
ルミニウム系金属板１が延伸されず解放された状態で曲
げ加工されることにより、前記内部歪の発生が低減さ
れ、超塑性の加工性を損なうことはない。In the above preforming, internal stress is unavoidably generated in the aluminum-based metal plate 1, but as described above, the aluminum-based metal plate 1 is bent without being stretched, so that The occurrence of internal strain is reduced, and the workability of superplasticity is not impaired.
【００２０】次に、図１（ｃ）及び図２（ｃ）示の様
に、予備成形体２を凹型の成形部３を備える成形型４
に、成形部３を閉蓋するように配置する。本実施例で
は、この状態で予備成形体２を急熱し、予備成形体２の
結晶を再結晶させる。Next, as shown in FIGS. 1 (c) and 2 (c), the preform 2 is provided with a molding die 4 having a concave molding portion 3.
Then, the molding unit 3 is arranged so as to close the lid. In this embodiment, the preform 2 is rapidly heated in this state to recrystallize the crystals of the preform 2.
【００２１】前記急熱は、予備成形体２を５００℃に維
持されている成形型４に配置して、さらに加熱すること
により行われる。予備成形体２は、このようにされるこ
とにより、図３示のように、配置後数分間で所定の温度
（４５０℃）まで容易に昇温される。このときは、昇温
速度が０．６℃／秒以上となるように配慮をしておく。
尚、成形部３内の温度は、予備成形体２を配置する際に
約４００℃に低下するが、予備成形体２が昇温される時
間内で成形型４と同温の５００℃まで上昇する。The rapid heating is performed by placing the preform 2 in the mold 4 maintained at 500 ° C. and further heating it. By doing so, the preform 2 can be easily heated to a predetermined temperature (450 ° C.) within a few minutes after the placement, as shown in FIG. At this time, attention should be paid so that the rate of temperature rise is 0.6 ° C./sec or more.
It should be noted that the temperature in the molding section 3 drops to about 400 ° C. when the preform 2 is placed, but rises to 500 ° C., which is the same temperature as the molding die 4, within the time during which the preform 2 is heated. To do.
【００２２】次に、前記のように急熱されて再結晶され
た予備成形体２に対して、図２（ｃ）に矢示する様に、
予備成形体２に高圧気体を供給し、所定時間維持する。
このようにすることにより、予備成形体２は５００℃弱
の温度に加熱されるとともに、成形部３に沿って超塑性
成形され、図１（ｄ）及び図２（ｄ）に示す自動二輪車
の燃料タンク５が得られる。燃料タンク５は、前記成形
後、成形型４から取り出され、常温まで放冷される。Next, as shown in FIG. 2 (c), with respect to the preform 2 that has been rapidly heated and recrystallized as described above,
A high-pressure gas is supplied to the preform 2 and maintained for a predetermined time.
By doing so, the preform 2 is heated to a temperature of a little less than 500 ° C. and is superplastically formed along the forming part 3 so that the motorcycle shown in FIG. 1 (d) and FIG. A fuel tank 5 is obtained. After the molding, the fuel tank 5 is taken out from the molding die 4 and allowed to cool to room temperature.
【００２３】前記燃料タンク５は、アルミニウム系金属
板１に対して最大２００％の伸び率で超塑性成形されて
いるが、前記伸び率の大きな部分でも他の部分と同等の
肉厚が確保されており、全体の肉厚均一になっている。
また、燃料タンク５では結晶粒に粗大化は認められず、
超塑性成形により発生した空洞は全体の５．５％以下
で、優れた強度を有している。The fuel tank 5 is superplastically formed at a maximum elongation of 200% with respect to the aluminum-based metal plate 1. However, even at a portion having a large elongation, a wall thickness equivalent to that of the other portion is secured. The thickness is uniform throughout.
Further, in the fuel tank 5, no crystal grain coarsening was observed,
The cavities generated by superplastic forming account for 5.5% or less of the whole and have excellent strength.
【００２４】[0024]
【発明の効果】以上のことから明らかなように、本発明
のアルミニウム系金属板の成形方法によれば、再結晶粒
が存在しないアルミニウム系金属板を予備成形したの
ち、常温から３６０乃至５６０℃、好ましくは４４０乃
至５４０℃の範囲の温度まで０．６℃／秒以上の速度で
昇温して急熱するという特定の条件で急熱再結晶するこ
とにより、該アルミニウム系金属板の結晶粒が再結晶さ
れて超塑性成形に適した物性を付与することができ、前
記急熱再結晶後、直ちに超塑性成形することにより、伸
び率の大きな部分でも十分な肉厚を確保することができ
るとともに、粗大化された結晶粒による空洞の発生が抑
制されて優れた強度を有する製品を得ることができる。As is apparent from the above, according to the method for forming an aluminum-based metal sheet of the present invention, after preforming an aluminum-based metal sheet having no recrystallized grains, the temperature is from room temperature to 360 to 560 ° C. Preferably, the crystal grains of the aluminum-based metal plate are obtained by rapid recrystallization under a specific condition that the temperature is raised to a temperature in the range of 440 to 540 ° C. at a rate of 0.6 ° C./sec or more to rapidly heat. Can be recrystallized to impart physical properties suitable for superplastic forming, and by performing superplastic forming immediately after the rapid thermal recrystallization, a sufficient wall thickness can be secured even in a portion having a large elongation rate. At the same time, it is possible to obtain a product having excellent strength by suppressing the generation of cavities due to the coarsened crystal grains.
【００２５】また、本発明のアルミニウム系金属板の成
形方法では、前記予備成形を曲げ加工により行うことに
より、アルミニウム系金属板が延伸されず解放された状
態で予備成形され、変形量の大きな部分の内部応力の発
生を低減して、結晶粒の粗大化を抑制することができる
ので、局部的な空洞の発生が抑制され優れた強度を有す
る製品を得ることができる。Further, in the method for forming an aluminum-based metal sheet according to the present invention, by performing the preforming by bending, the aluminum-based metal sheet is preformed in a released state without being stretched, and a portion having a large deformation amount. Since it is possible to reduce the occurrence of internal stress and suppress the coarsening of crystal grains, it is possible to obtain a product having excellent strength in which the occurrence of local cavities is suppressed.
【００２６】また、前記成形型は予め加熱されているこ
とにより、前記アルミニウム系金属板を短時間で高温に
加熱することができ、熱効率を向上させることができ
る。Further, since the molding die is preheated, the aluminum-based metal plate can be heated to a high temperature in a short time, and the thermal efficiency can be improved.
【図１】本発明に係わる成形方法の工程を概念的に示す
断面図。FIG. 1 is a sectional view conceptually showing a step of a molding method according to the present invention.
【図２】図１のＩＩ−ＩＩ線断面図。FIG. 2 is a sectional view taken along line II-II of FIG.
【図３】本発明に係わる成形方法の再結晶工程でアルミ
ニウム系金属板を急熱する方法の一例を示すグラフ。FIG. 3 is a graph showing an example of a method for rapidly heating an aluminum-based metal plate in the recrystallization step of the molding method according to the present invention.
１…アルミニウム系金属板、２…予備成形体、３…成形
部、４…成形型。DESCRIPTION OF SYMBOLS 1 ... Aluminum metal plate, 2 ... Preform, 3 ... Molding part, 4 ... Mold.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ６３Ｂ 3/09 7626−3Ｄ Ｃ２２Ｆ 1/04 Ａ (72)発明者 今野 雄一 埼玉県狭山市新狭山１丁目10番地１ ホン ダエンジニアリング株式会社内 (72)発明者 小杉 雅紀 埼玉県狭山市新狭山１丁目10番地１ ホン ダエンジニアリング株式会社内 (72)発明者 池田 英明 埼玉県狭山市新狭山１丁目10番地１ ホン ダエンジニアリング株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Reference number within the agency FI Technical display location B63B 3/09 7626-3D C22F 1/04 A (72) Inventor Yuichi Konno Shin-Sayama 1-10-10 1 within Honda Engineering Co., Ltd. (72) Inventor Masaki Kosugi 1-10-1 Shin-Sayama, Sayama-shi, Saitama Prefecture 1-10 inside Honda Engineering Co., Ltd. (72) Hideaki Ikeda 1-chome Shin-Sayama, Sayama-shi, Saitama Prefecture Address 1 Inside Honda Engineering Co., Ltd.
Claims (4)
形部を備える成形型に、該成形部を閉蓋するように配置
して、圧空成形により該金属板を該成形部に沿って超塑
性成形させる金属板の成形方法において、 再結晶粒の存在しないアルミニウム系金属板を前記超塑
性変形の伸び方向に沿って予備成形する予備成形工程
と、常温から３６０乃至５６０℃の範囲の温度まで０．
６℃／秒以上の速度で昇温して急熱し、再結晶させる急
熱再結晶工程と、前記再結晶されたアルミニウム系金属
板を前記圧空成形により超塑性成形させる圧空成形工程
とからなることを特徴とするアルミニウム系金属板の成
形方法。1. An aluminum-based metal plate is heated and placed in a molding die having a concave molding part so as to close the molding part, and the metal plate is superposed along the molding part by pressure molding. In a method of forming a metal plate to be plastically formed, a preforming step of preforming an aluminum-based metal sheet having no recrystallized grains along the extension direction of the superplastic deformation, and a temperature from room temperature to a temperature in the range of 360 to 560 ° C. 0.
And a rapid heating recrystallization step of raising the temperature at a rate of 6 ° C./second or more to rapidly heat and recrystallization, and a pressure forming step of superplastic forming the recrystallized aluminum-based metal sheet by the pressure forming. A method for forming an aluminum-based metal plate, comprising:
ニウム系金属板を４４０〜５４０℃の範囲の温度まで前
記範囲の速度で昇温して急熱することを特徴とする請求
項１記載のアルミニウム系金属板の成形方法。2. The rapid heat recrystallization step, wherein the aluminum-based metal plate is rapidly heated to a temperature in the range of 440 to 540 ° C. at a rate in the range. A method for forming an aluminum-based metal plate.
ウム系金属板を曲げ加工により予備成形することを特徴
とする請求項１または請求項２記載のアルミニウム系金
属板の成形方法。3. The method for forming an aluminum-based metal sheet according to claim 1, wherein in the preforming step, the aluminum-based metal sheet is preformed by bending.
形されたアルミニウム系金属板を予め加熱されている前
記成形型に配置して前記範囲の温度まで前記範囲の速度
で昇温して急熱することを特徴とする請求項１乃至請求
項３のいずれかの項記載のアルミニウム系金属板の成形
方法。4. In the rapid thermal recrystallization step, the preformed aluminum-based metal plate is placed in the pre-heated forming die, and the temperature is raised to the temperature in the range at a speed in the range and the temperature is rapidly increased. The method for forming an aluminum-based metal sheet according to claim 1, wherein heating is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6094125A JP2804438B2 (en) | 1994-05-06 | 1994-05-06 | Forming method of aluminum-based metal plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6094125A JP2804438B2 (en) | 1994-05-06 | 1994-05-06 | Forming method of aluminum-based metal plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07299518A true JPH07299518A (en) | 1995-11-14 |
| JP2804438B2 JP2804438B2 (en) | 1998-09-24 |
Family
ID=14101705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6094125A Expired - Lifetime JP2804438B2 (en) | 1994-05-06 | 1994-05-06 | Forming method of aluminum-based metal plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2804438B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020020033A (en) * | 2000-09-06 | 2002-03-14 | 이경환 | Manufacturing Method of Aluminum Panel Using Superplastic Material |
| JP2007062657A (en) * | 2005-09-01 | 2007-03-15 | Nissan Motor Co Ltd | Pillar of automobile and its manufacturing method |
| US7390023B2 (en) | 2004-11-19 | 2008-06-24 | Yamaha Hatsudoki Kabushiki Kaisha | Motorcycle fuel tank |
-
1994
- 1994-05-06 JP JP6094125A patent/JP2804438B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020020033A (en) * | 2000-09-06 | 2002-03-14 | 이경환 | Manufacturing Method of Aluminum Panel Using Superplastic Material |
| US7390023B2 (en) | 2004-11-19 | 2008-06-24 | Yamaha Hatsudoki Kabushiki Kaisha | Motorcycle fuel tank |
| JP2007062657A (en) * | 2005-09-01 | 2007-03-15 | Nissan Motor Co Ltd | Pillar of automobile and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2804438B2 (en) | 1998-09-24 |
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