JP2012166232A - Method for manufacturing magnesium alloy material - Google Patents

Method for manufacturing magnesium alloy material Download PDF

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JP2012166232A
JP2012166232A JP2011028609A JP2011028609A JP2012166232A JP 2012166232 A JP2012166232 A JP 2012166232A JP 2011028609 A JP2011028609 A JP 2011028609A JP 2011028609 A JP2011028609 A JP 2011028609A JP 2012166232 A JP2012166232 A JP 2012166232A
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plate
magnesium alloy
correction
press
straightening
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Takahiko Kitamura
貴彦 北村
Yukihiro Oishi
幸広 大石
Koji Mori
宏治 森
Nozomi Kawabe
望 河部
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Sumitomo Electric Industries Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a magnesium alloy material in which the magnesium alloy material subjected to the press working can be manufactured with excellent productivity.SOLUTION: A rolled coil material as a raw material in which a long rolled sheet consisting of a magnesium alloy is coiled, is uncoiled, and a raw material sheet 100 is introduced in a straightening mechanism 20A to manufacture a straightened sheet 110. The obtained straightened sheet 110 is introduced to a press mechanism 40, and successively subjected to the press working to manufacture a magnesium alloy material 10. In this manufacturing method, the straightened raw material can be continuously supplied to the press mechanism 40 by executing the progressive press working continuously to the straightening work, and the magnesium alloy material 10 can be manufactured with excellent productivity. In particular, the straightened raw material has excellent flatness, and can be conveyed to the prescribed position of the press mechanism 40 with excellent accuracy. Thus, the magnesium alloy material 10 having the excellent dimensional accuracy can be manufactured.

Description

本発明は、プレス加工が施されてなるマグネシウム合金材の製造方法に関するものである。特に、マグネシウム合金材を生産性よく製造可能な製造方法に関するものである。   The present invention relates to a method for producing a magnesium alloy material that has been subjected to press working. In particular, the present invention relates to a production method capable of producing a magnesium alloy material with high productivity.

軽量で比強度、比剛性に優れるマグネシウム合金が、携帯電話やノート型パーソナルコンピュータといった携帯用電気・電子機器類の筐体や自動車部品などの各種の製品・部品の構成材料に利用されてきている。   Magnesium alloys that are lightweight and have excellent specific strength and specific rigidity have been used in the components of various products and parts such as casings for portable electrical and electronic devices such as mobile phones and notebook personal computers and automobile parts. .

マグネシウム合金材は、ダイカスト法やチクソモールド法による鋳造材(ASTM規格のAZ91合金)が主流である。近年、ASTM規格のAZ31合金に代表される展伸用マグネシウム合金からなる板にプレス加工を施したプレス加工材が使用されつつある。また、特許文献1は、ASTM規格におけるAZ91合金相当のマグネシウム合金からなり、プレス加工性に優れるマグネシウム合金板材を開示している。   Magnesium alloy materials are mainly cast materials (ASTM standard AZ91 alloy) produced by die casting or thixomolding. In recent years, a press-worked material obtained by press-working a plate made of a magnesium alloy for extension represented by ASTM standard AZ31 alloy is being used. Patent Document 1 discloses a magnesium alloy plate material made of a magnesium alloy equivalent to the AZ91 alloy in the ASTM standard and having excellent press workability.

特許文献1は、上記マグネシウム合金板材の製造方法として、双ロール連続鋳造法により製造したAZ91合金相当の組成の鋳造板に圧延を施し、得られた圧延板を加熱した状態で、千鳥状に配置したローラ間を通過させることを開示している。上記合金板材は、上記ローラにより矯正されて平坦性に優れることから、プレス装置の所定の位置に精度良く配置させることができ、寸法精度に優れるプレス加工材を製造できる。また、この合金板材は、圧延時に導入された歪みが残存することで、プレス加工時、動的な再結晶化が生じてプレス加工性に優れることからも、高精度なプレス加工材を製造できる。   Patent Document 1 describes a method for producing the magnesium alloy plate material described above, in which a cast plate having a composition equivalent to an AZ91 alloy produced by a twin roll continuous casting method is rolled, and the obtained rolled plate is heated and arranged in a staggered manner. It is disclosed to pass between the rollers. Since the alloy plate material is corrected by the roller and has excellent flatness, the alloy plate material can be accurately arranged at a predetermined position of the press device, and a press-worked material having excellent dimensional accuracy can be manufactured. In addition, since the strain introduced during rolling remains in this alloy plate material, dynamic recrystallization occurs during press processing, and the press workability is excellent. Therefore, it is possible to manufacture a highly accurate press processed material. .

国際公開第2009/001516号International Publication No. 2009/001516

プレス加工といった塑性加工が施されたマグネシウム合金材の生産性の向上が望まれている。   Improvement of the productivity of a magnesium alloy material subjected to plastic working such as press working is desired.

マグネシウム合金材の生産性を向上するためには、プレス加工などの塑性加工やその他の加工を行うにあたり、加工装置に素材を連続的に供給することが望まれる。例えば、長尺な圧延板などの板状材を円筒状に巻き取ったコイル材を素材に利用することで、上記加工装置に素材を連続的に供給することができる。   In order to improve the productivity of the magnesium alloy material, it is desired to continuously supply the raw material to the processing apparatus when performing plastic processing such as press processing or other processing. For example, a raw material can be continuously supplied to the said processing apparatus by using for the raw material the coil material which wound up plate-shaped materials, such as a long rolled board, in the cylindrical shape.

しかし、コイル材では、巻き癖により平坦性に劣る恐れがある。
コイル材を利用する場合、特に、巻き取り径(内径)を小さくすると、長尺材でも小型にできるため、搬送や上記加工装置への設置などが容易である上に、上記加工装置に対して1回に供給可能な素材量を多くでき、マグネシウム合金材の生産性をより高められると期待される。しかし、巻き取り径が小さいと、マグネシウム合金の組成によらず、板状材に巻き癖が付き易い。
However, the coil material may be inferior in flatness due to curl.
When using a coil material, in particular, if the winding diameter (inner diameter) is reduced, even a long material can be made smaller, so that it can be easily transported and installed in the processing device, etc. It is expected that the amount of material that can be supplied at one time can be increased, and the productivity of magnesium alloy materials can be further increased. However, if the winding diameter is small, the plate-shaped material is likely to be wrinkled regardless of the composition of the magnesium alloy.

巻き癖が付いた場合、コイル材を巻き戻しただけでは曲がっていて平坦にならない。そして、このような曲がった板状材を上記加工装置に供給すると、当該加工装置の所定の位置に素材を精度良く位置決めできず、寸法精度に劣るプレス加工材が製造され、歩留まりの低下を招く恐れがある。その結果、マグネシウム合金材の生産性の低下を招く。   When a curl is attached, it is bent and does not become flat just by rewinding the coil material. When such a bent plate-shaped material is supplied to the processing device, the material cannot be accurately positioned at a predetermined position of the processing device, and a press-worked material with inferior dimensional accuracy is manufactured, resulting in a decrease in yield. There is a fear. As a result, the productivity of the magnesium alloy material is reduced.

上述のように千鳥状に配置したローラ間を通過させて平坦性に優れる素材を利用した場合でも、通過後に巻き取ることで上述のように巻き癖がつく場合がある。   Even when a material having excellent flatness is used by passing between rollers arranged in a staggered manner as described above, winding may occur as described above by winding after passing.

そこで、本発明の目的は、マグネシウム合金材を生産性よく製造可能なマグネシウム合金材の製造方法を提供することにある。   Then, the objective of this invention is providing the manufacturing method of the magnesium alloy material which can manufacture a magnesium alloy material with sufficient productivity.

本発明は、長尺な圧延板を素材とし、この圧延板に順次矯正加工を施し、この矯正板を巻き取ることなく、そのまま連続してプレス加工を施すことで、上記目的を達成する。   The present invention achieves the above-described object by using a long rolled plate as a raw material, subjecting the rolled plate to correction processing sequentially, and continuously pressing the rolled plate without taking up the correction plate.

本発明は、マグネシウム合金からなる板材にプレス加工を施して、マグネシウム合金材を製造する方法に係るものであり、以下の準備工程、矯正工程、成形工程を具える。
準備工程:長尺な圧延板が巻き取られた圧延コイル材を準備する工程
矯正工程:上記圧延コイル材を巻き戻して上記圧延板に矯正加工を施し、矯正板を作製する工程
成形工程:上記矯正板を巻き取ることなく、上記矯正加工に引き続いて順送プレス加工を施し、マグネシウム合金材を作製する工程
The present invention relates to a method for producing a magnesium alloy material by pressing a plate material made of a magnesium alloy, and includes the following preparation process, correction process, and molding process.
Preparation step: a step of preparing a rolled coil material in which a long rolled plate is wound up. Correction step: a step of unwinding the rolled coil material and subjecting the rolled plate to a correction process to produce a corrected plate. The process of producing a magnesium alloy material by performing progressive press processing following the above-mentioned correction processing without winding up the correction plate

上記構成によれば、素材となるコイル材を巻き戻し、適宜巻き取るなどして素材板を走行させることで、素材板に連続して矯正加工及びプレス加工を容易に施すことができる。また、上記構成によれば、矯正加工からプレス加工までの間に巻き取り作業が無く、矯正加工からプレス加工までを一続きとしてプレス加工材を作製する。そのため、矯正された素材(矯正板)は、巻き癖などが付いておらず、平坦性に優れる状態でプレス加工装置に供給されることから、当該装置の所定の位置に精度良く配置され、この状態でプレス加工が施される。従って、上記構成によれば、寸法精度に優れるプレス加工材を成形でき、寸法欠陥品を低減できる。また、矯正された素材(矯正板)は、圧延時に導入された歪み(せん断帯)を十分に残存しているため、プレス加工時、動的な再結晶化を十分に生じることで成形性に優れる。この点からも、上記構成によれば、マグネシウム合金材を生産性よく製造できる。このように上記構成によれば、塑性加工性に優れる素材を連続的に供給可能である、平坦性に優れる素材を精度良く配置できる、寸法欠陥品の低減により歩留まりを向上できる、といった優れた効果を奏し、マグネシウム合金材の生産性の向上に寄与することができる。   According to the above configuration, the straightening and pressing can be easily performed continuously on the material plate by rewinding the coil material that is the material and running the material plate by appropriately winding it. Moreover, according to the said structure, there is no winding-up operation | work from a correction process to a press process, and a press work material is produced as a continuation from a correction process to a press process. Therefore, the straightened material (correction plate) is not attached with curl etc. and is supplied to the press processing device in a state of excellent flatness. Press work is performed in the state. Therefore, according to the said structure, the press work material which is excellent in dimensional accuracy can be shape | molded, and a dimensional defect product can be reduced. In addition, since the straightened material (corrected plate) retains sufficient strain (shear band) introduced during rolling, sufficient dynamic recrystallization occurs during press processing to improve formability. Excellent. Also from this point, according to the said structure, a magnesium alloy material can be manufactured with sufficient productivity. As described above, according to the above configuration, it is possible to continuously supply a material having excellent plastic workability, to accurately arrange a material having excellent flatness, and to improve yield by reducing dimensional defect products. Can contribute to the improvement of the productivity of the magnesium alloy material.

更に、本発明製造方法により得られたマグネシウム合金材は、上述のように寸法精度に優れて高品位であることに加えて、圧延板にプレス加工が施された塑性加工材であることから、ダイカスト材やチクソモールド材と比較して、強度や靭性、耐衝撃性といった機械的特性、耐食性にも優れる。   Furthermore, the magnesium alloy material obtained by the production method of the present invention is a plastic work material obtained by pressing a rolled plate in addition to being excellent in dimensional accuracy and high quality as described above. Compared to die-cast materials and thixo-mold materials, they are excellent in mechanical properties such as strength, toughness and impact resistance, and corrosion resistance.

本発明の一形態として、上記矯正加工を冷間で行い、上記順送プレス加工前に上記矯正板を加熱する予熱工程を具える形態が挙げられる。   As one form of this invention, the form which comprises the preheating process which performs the said correction process coldly and heats the said correction board before the said progressive press process is mentioned.

上記形態によれば、冷間にて矯正加工を施すことで、圧延時に導入された歪み(せん断帯)が熱により解放されることを抑制でき、当該歪みが十分に残存した矯正板を製造できる。また、冷間にて矯正加工を施すことで、矯正により曲げを与え易く、圧延板の平坦性を高め易い。従って、上記形態によれば、塑性加工性に優れる上に平坦性にも優れる素材をプレス加工に供することができるため、高精度なプレス加工材を生産性よく製造できる。かつ、上記形態によれば、プレス加工前に予熱を行うことで、上記矯正板の塑性加工性を高められるため、曲げ半径が小さいなどの比較的強加工でも、プレス加工を良好に行える。   According to the above aspect, by performing correction processing in the cold, it is possible to suppress the distortion (shear band) introduced during rolling from being released by heat, and it is possible to manufacture a correction plate in which the distortion remains sufficiently. . Moreover, it is easy to give a bending by correction | amendment by performing correction | amendment processing in cold, and it is easy to improve the flatness of a rolled sheet. Therefore, according to the said form, since the raw material which is excellent in plastic workability and also in flatness can be used for press work, a highly accurate press work material can be manufactured with high productivity. And according to the said form, since the plastic workability of the said correction board can be improved by performing preheating before press work, press work can be favorably performed even in comparatively strong work such as a small bending radius.

本発明の一形態として、上記矯正加工は温間で行い、上記順送プレス加工は上記矯正板を更に加熱することなく行う形態が挙げられる。   As one form of this invention, the said correction process is performed warmly, and the said progressive press process is the form performed without heating the said correction board further.

上記形態によれば、温間で矯正加工を施すことで、素材となる圧延板の塑性加工性を高められるため、圧延板に多少の厚さのばらつきがあったり、反りが大きかったり、圧延時の潤滑剤などが付着しているなど表面性状に劣る状態であったりしても、割れなどを生じることなく、矯正加工を良好に施すことができ、平坦性に優れる矯正板を形成できる。このような矯正板をプレス加工に供することができるため、上記形態によれば、高精度なプレス加工材を生産性よく製造できる。かつ、上記形態によれば、プレス加工にあたり、矯正板を更に加熱しないため、予熱手段を別途設ける必要がなく、加熱のためのエネルギーも不要である。   According to the above form, by performing the correction process warmly, the plastic workability of the rolled sheet as a raw material can be improved, so the rolled sheet has some thickness variation, large warpage, Even if it is in a state inferior in surface properties such as adhesion of a lubricant, it is possible to satisfactorily carry out correction processing without causing cracks and to form a correction plate having excellent flatness. Since such a correction plate can be subjected to press working, according to the above embodiment, a highly accurate press work material can be produced with high productivity. And according to the said form, in the press work, in order not to heat a correction board further, it is not necessary to provide a preheating means separately, and the energy for heating is also unnecessary.

本発明製造方法は、種々の元素を添加元素とするマグネシウム合金(残部Mg及び不純物、Mg:50質量%以上)に適用できると期待される。特に、添加元素の濃度が高い合金、具体的には添加元素の合計含有量が7.3質量%以上であるマグネシウム合金は、添加元素の種類にもよるが、強度や硬度といった機械的特性、耐食性、難燃性、耐熱性といった種々の特性に優れる。従って、本発明製造方法によれば、種々の組成のマグネシウム合金からなり、上記各特性に優れるマグネシウム合金材を製造できる。   The production method of the present invention is expected to be applicable to magnesium alloys containing various elements as additive elements (remainder Mg and impurities, Mg: 50% by mass or more). In particular, alloys with a high concentration of additive elements, specifically magnesium alloys with a total content of additive elements of 7.3% by mass or more, depending on the type of additive element, mechanical properties such as strength and hardness, corrosion resistance, Excellent properties such as flame retardancy and heat resistance. Therefore, according to the production method of the present invention, it is possible to produce a magnesium alloy material made of magnesium alloys having various compositions and excellent in each of the above characteristics.

具体的な添加元素は、Al,Zn,Mn,Si,Be,Ca,Sr,Y,Cu,Ag,Sn,Li,Zr,Ce,Ni,Au及び希土類元素(Y,Ceを除く)から選択される少なくとも1種の元素が挙げられる。不純物は、例えば、Feなどが挙げられる。   Specific additive elements are selected from Al, Zn, Mn, Si, Be, Ca, Sr, Y, Cu, Ag, Sn, Li, Zr, Ce, Ni, Au, and rare earth elements (excluding Y and Ce) And at least one element. Examples of the impurity include Fe.

特に、Alを含有するMg-Al系合金は、耐食性に優れる上に、強度、耐塑性変形性といった機械的特性にも優れる。Alの含有量が多いほど上記効果が高い傾向にあり、5.8質量%以上、更に7質量%、特に、7.3質量%以上が好ましい。但し、Alの含有量が12質量%を超えると塑性加工性の低下を招くことから、上限は12質量%、更に11質量%が好ましい。Al以外の各元素の含有量は、例えば、合計で0.01質量%以上10質量%以下、好ましくは0.1質量%以上5質量%以下が挙げられる。   In particular, Mg-Al alloys containing Al are excellent in corrosion resistance and mechanical properties such as strength and plastic deformation resistance. The higher the content of Al, the higher the above effect tends to be, and 5.8% by mass or more, further 7% by mass, and particularly 7.3% by mass or more are preferable. However, if the Al content exceeds 12% by mass, the plastic workability is lowered, so the upper limit is preferably 12% by mass, and more preferably 11% by mass. Examples of the content of each element other than Al include 0.01% by mass or more and 10% by mass or less, preferably 0.1% by mass or more and 5% by mass or less.

Mg-Al系合金のより具体的な組成は、例えば、ASTM規格におけるAZ系合金(Mg-Al-Zn系合金、Zn:0.2質量%〜1.5質量%)、AM系合金(Mg-Al-Mn系合金、Mn:0.15質量%〜0.5質量%)、AS系合金(Mg-Al-Si系合金、Si:0.01質量%〜20質量%)、Mg-Al-RE(希土類元素)系合金、AX系合金(Mg-Al-Ca系合金、Ca:0.2質量%〜6.0質量%)、AJ系合金(Mg-Al-Sr系合金、Sr:0.2質量%〜7.0質量%)などが挙げられる。Alを5.8質量%以上含有するAZ系合金は、例えば、AZ61合金、AZ80合金、後述するAZ91合金が挙げられる。   More specific compositions of Mg-Al alloys include, for example, AZ alloys (Mg-Al-Zn alloys, Zn: 0.2% to 1.5% by mass), AM alloys (Mg-Al-Mn) according to ASTM standards. Alloy, Mn: 0.15 mass% to 0.5 mass%), AS alloy (Mg-Al-Si alloy, Si: 0.01 mass% to 20 mass%), Mg-Al-RE (rare earth element) alloy, AX Alloy (Mg—Al—Ca alloy, Ca: 0.2 mass% to 6.0 mass%), AJ alloy (Mg—Al—Sr alloy, Sr: 0.2 mass% to 7.0 mass%), and the like. Examples of the AZ alloy containing 5.8% by mass or more of Al include AZ61 alloy, AZ80 alloy, and AZ91 alloy described later.

本発明の一形態として、上記マグネシウム合金がAlを8.3質量%以上9.5質量%以下含有する形態が挙げられる。   As one form of this invention, the form in which the said magnesium alloy contains Al 8.3 mass% or more and 9.5 mass% or less is mentioned.

Alを7.3質量%以上12質量%以下含有する形態、特にAlを8.3質量%〜9.5質量%含有する形態は、強度に優れる上に耐食性にも優れる。Alを8.3質量%〜9.5質量%含有する合金として、更にZnを0.5質量%〜1.5質量%含有するMg-Al-Zn系合金、代表的にはAZ91合金が挙げられる。   The form containing Al in the range of 7.3% by mass to 12% by mass, particularly the form containing Al in the range of 8.3% by mass to 9.5% by mass is excellent in strength and corrosion resistance. Examples of the alloy containing 8.3 mass% to 9.5 mass% of Al further include an Mg—Al—Zn alloy containing 0.5 mass% to 1.5 mass% of Zn, typically AZ91 alloy.

その他、Y,Ce,Ca,及び希土類元素(Y,Ceを除く)から選択される少なくとも1種の元素を合計0.001質量%以上、好ましくは合計0.1質量%以上5質量%以下含有し、残部がMg及び不純物からなるマグネシウム合金は、耐熱性、難燃性に優れる。希土類元素を含有する場合、その合計含有量は0.1質量%以上が好ましく、特に、Yを含有する場合、その含有量は0.5質量%以上が好ましい。   In addition, it contains at least one element selected from Y, Ce, Ca, and rare earth elements (excluding Y and Ce) in a total amount of 0.001% by mass or more, preferably a total of 0.1% by mass or more and 5% by mass or less, and the balance A magnesium alloy composed of Mg and impurities is excellent in heat resistance and flame retardancy. When the rare earth element is contained, the total content is preferably 0.1% by mass or more, and particularly when Y is contained, the content is preferably 0.5% by mass or more.

本発明マグネシウム合金材の製造方法は、マグネシウム合金材を生産性よく製造することができる。   The method for producing a magnesium alloy material of the present invention can produce a magnesium alloy material with high productivity.

図1は、実施形態1に係るマグネシウム合金材の製造方法を説明する概略工程図である。FIG. 1 is a schematic process diagram illustrating a method for producing a magnesium alloy material according to Embodiment 1. 図2は、実施形態2に係るマグネシウム合金材の製造方法を説明する概略工程図である。FIG. 2 is a schematic process diagram illustrating a method for producing a magnesium alloy material according to Embodiment 2.

[実施形態1]
以下、図1を参照して、実施形態1に係るマグネシウム合金材の製造方法を説明する。この製造方法は、プレス加工が施されたマグネシウム合金材(プレス加工材)10を製造する方法に係るものである。この製造方法は、マグネシウム合金からなる長尺な圧延板が巻き取られた圧延コイル材を素材として用意し、この圧延コイル材を巻き戻した素材板100(圧延板)を走行させて、矯正加工、順送プレス加工を連続して施す。より具体的には、素材板100を矯正機構20Aに搬送して矯正加工を施し、得られた矯正板110をプレス機構40に搬送して順送プレス加工を施し、マグネシウム合金材10を作製する。そして、この製造方法は、矯正板110を巻き取ることなく、矯正加工に引き続いて順送プレス加工を施すことを最大の特徴とする。また、実施形態1の製造方法では、矯正加工を冷間加工とし、順送プレス加工を施す前に矯正板110を予熱機構30に導入して加熱し、この加熱した矯正板110にプレス加工を施す。以下、素材板100をまず説明し、その後、各工程をより詳しく説明する。
[Embodiment 1]
Hereinafter, a method for manufacturing a magnesium alloy material according to Embodiment 1 will be described with reference to FIG. This manufacturing method relates to a method of manufacturing a magnesium alloy material (pressed material) 10 that has been subjected to press working. This manufacturing method prepares a rolled coil material in which a long rolled plate made of a magnesium alloy is wound up as a material, travels the material plate 100 (rolled plate) on which the rolled coil material is rewound, and corrects it. , Progressive press working is performed continuously. More specifically, the material plate 100 is conveyed to the correction mechanism 20A and subjected to correction processing, and the obtained correction plate 110 is conveyed to the press mechanism 40 and subjected to progressive pressing to produce the magnesium alloy material 10. . The manufacturing method is characterized in that a progressive press process is performed subsequent to the correction process without winding up the correction plate 110. Further, in the manufacturing method of the first embodiment, the straightening process is a cold work, and the straightening plate 110 is introduced into the preheating mechanism 30 and heated before the progressive press work, and the heated straightening plate 110 is subjected to the press work. Apply. Hereinafter, the material plate 100 will be described first, and then each process will be described in more detail.

(素材板)
素材板100に利用する圧延コイル材は、例えば、以下のようにして得られる。双ロール連続鋳造法といった連続鋳造法により長尺なマグネシウム合金鋳造板を作製して巻き取り、この巻き取った鋳造コイル材を巻き戻して、鋳造板に少なくとも1パスの圧延(代表的には温間圧延)を施して長尺な圧延板を作製し、この圧延板を巻き取る。
(Material board)
The rolled coil material used for the material plate 100 is obtained as follows, for example. A long magnesium alloy cast plate is produced and wound by a continuous casting method such as a twin-roll continuous casting method, the wound cast coil material is rewound, and the cast plate is rolled for at least one pass (typically warm). A long rolled sheet is produced by winding the rolled sheet.

急冷凝固が可能な連続鋳造法を利用することで、酸化物や偏析などを低減できる上に、割れの起点になり得る10μm超といった粗大な晶析出物の生成を抑制できる。また、連続鋳造法では、長尺な鋳造材を製造可能であり、このような長尺材を圧延に供することで、長尺な圧延板を容易に製造できる。連続鋳造法には、双ロール法、ツインベルト法、ベルトアンドホイール法といった種々の方法があるが、板状の鋳造材の製造には、双ロール法やツインベルト法が好適に利用できる。特に、双ロール連続鋳造法は、剛性及び熱伝導性に優れ、かつ偏析が少ない鋳造板を形成し易い。WO/2006/003899に記載の鋳造方法を利用してもよい。   By using a continuous casting method capable of rapid solidification, it is possible to reduce oxides, segregation, and the like, and to suppress the formation of coarse crystal precipitates exceeding 10 μm that can be the starting point of cracking. Further, in the continuous casting method, a long cast material can be manufactured, and a long rolled plate can be easily manufactured by subjecting such a long material to rolling. The continuous casting method includes various methods such as a twin roll method, a twin belt method, and a belt and wheel method, but the twin roll method and the twin belt method can be suitably used for producing a plate-shaped cast material. In particular, the twin-roll continuous casting method is easy to form a cast plate having excellent rigidity and thermal conductivity and less segregation. The casting method described in WO / 2006/003899 may be used.

上記鋳造板の厚さ、幅、及び長さは、適宜選択することができる。例えば、厚さが10mm以下、更に7mm以下、特に5mm以下であると、偏析などが存在し難く、強度に優れる。また、長さが30m以上、更に50m以上、とりわけ100m以上といった長尺な鋳造板や、幅が100mm以上、更に200mm以上、とりわけ250mm以上といった広幅な鋳造板を圧延板の素材とすると、長尺な圧延板や広幅な圧延板を作製でき、この圧延板を巻き取った圧延コイル材は、プレス加工材といった塑性加工材の素材に好適に利用できる。なお、鋳造コイル材の内径が小さい場合、鋳造板を巻き取る直前で150℃以上に加熱した状態で巻き取ると、割れが生じることなく巻き取ることができて好ましい。また、圧延前に、鋳造板の両縁部(幅方向の両側部)をトリミングしておくと、鋳造板の両縁部に割れが生じている場合でも、その割れが圧延時に進展することを防止できる。圧延途中や圧延板にも適宜トリミングを施してもよい。   The thickness, width, and length of the cast plate can be appropriately selected. For example, when the thickness is 10 mm or less, further 7 mm or less, particularly 5 mm or less, segregation or the like hardly occurs and the strength is excellent. In addition, if a long cast plate having a length of 30 m or more, further 50 m or more, especially 100 m or more, or a wide cast plate having a width of 100 mm or more, 200 mm or more, especially 250 mm or more is used as the material of the rolled plate, the long plate The rolled coil material obtained by winding the rolled plate can be suitably used as a material for plastic working material such as press working material. In addition, when the inner diameter of the cast coil material is small, it is preferable to wind the cast plate in a state of being heated to 150 ° C. or more immediately before winding the cast plate because it can be wound without causing cracks. In addition, if both edges (both sides in the width direction) of the cast plate are trimmed before rolling, even if cracks have occurred on both edges of the cast plate, the cracks will progress during rolling. Can be prevented. Trimming may be performed as appropriate during the rolling or on the rolled plate.

上記圧延は、上記鋳造板を含む素材を150℃以上400℃以下に加熱して行う温間圧延を少なくとも1パス含むことが好ましい。上記温度範囲で素材を加熱することで素材の塑性加工性を高められ、1パスあたりの圧下率を例えば、10%〜50%程度に高めても割れが生じ難い。また、上記温度範囲とすることで、素材表面の焼付きなどによる素材劣化の抑制、圧延ロールの熱劣化の抑制を図ることができる。上記素材の加熱温度は、350℃以下、更に300℃以下、特に150℃以上280℃以下が好ましい。この素材の加熱には、例えば、雰囲気炉(ヒートボックス)などを利用することが挙げられる。素材だけでなく圧延ロールも加熱したり(例えば、加熱温度:100℃〜250℃)、特開2007-098470号公報に開示される制御圧延、その他公知の圧延条件などを利用することができる。上記鋳造板に溶体化処理(例えば、加熱温度:350℃〜420℃、保持時間:0.5時間以上、特に1時間〜40時間)を施してから、圧延を施してもよい。上記鋳造板に溶体化処理を行うことで、組成の均質化や析出物の再固溶などを行って、靭性を高められる。   The rolling preferably includes at least one pass of warm rolling performed by heating the material including the cast plate to 150 ° C. or more and 400 ° C. or less. By heating the material in the above temperature range, the plastic workability of the material can be improved, and even if the rolling reduction per pass is increased to, for example, about 10% to 50%, cracks are hardly generated. Moreover, by setting it as the said temperature range, suppression of the raw material deterioration by the seizure of the raw material surface etc. and the suppression of the thermal deterioration of a rolling roll can be aimed at. The heating temperature of the material is preferably 350 ° C. or lower, more preferably 300 ° C. or lower, and particularly preferably 150 ° C. or higher and 280 ° C. or lower. For example, an atmospheric furnace (heat box) may be used for heating the material. Not only the raw material but also the rolling roll can be heated (for example, heating temperature: 100 ° C. to 250 ° C.), controlled rolling disclosed in JP 2007-098470 A, and other known rolling conditions can be used. The cast plate may be subjected to solution treatment (for example, heating temperature: 350 ° C. to 420 ° C., holding time: 0.5 hour or more, particularly 1 hour to 40 hours), and then rolled. By performing the solution treatment on the cast plate, the toughness can be increased by homogenizing the composition and re-dissolving the precipitate.

上記温間圧延を含む圧延は、1パスでも複数パス行ってもよい。複数パスの圧延を行うことで、厚さが薄い圧延板が得られる上に、圧延板を構成する組織の平均結晶粒径を小さくしたり(例えば、10μm以下、好ましくは5μm以下)、プレス加工といった塑性加工性を高められる。所望の厚さの圧延板が得られるように、パス数、各パスの圧下率、及び総圧下率を適宜選択することができる。複数パスの圧延を行う場合、例えば、素材の加熱温度や圧延ロールの温度、圧下率、ライン速度などの条件をパスごとに変更することができる。また、複数パスの圧延を行う場合、パス間に中間熱処理(例えば、加熱温度:150℃〜350℃(好ましくは300℃以下)、保持時間:0.5時間〜3時間)を行ってもよい。中間熱処理を行うことで、当該熱処理以降の圧延にあたり、素材の加工性を高められる。   The rolling including the warm rolling may be performed in one pass or multiple passes. By rolling a plurality of passes, a thin rolled sheet can be obtained, and the average crystal grain size of the structure constituting the rolled sheet can be reduced (for example, 10 μm or less, preferably 5 μm or less), or press working. It is possible to improve the plastic workability. The number of passes, the reduction rate of each pass, and the total reduction rate can be appropriately selected so that a rolled sheet having a desired thickness can be obtained. When rolling a plurality of passes, for example, conditions such as the heating temperature of the material, the temperature of the rolling roll, the rolling reduction, and the line speed can be changed for each pass. In addition, when performing multiple passes of rolling, intermediate heat treatment (for example, heating temperature: 150 ° C. to 350 ° C. (preferably 300 ° C. or less), holding time: 0.5 hours to 3 hours) may be performed between passes. By performing the intermediate heat treatment, the workability of the material can be improved in rolling after the heat treatment.

上記圧延板の厚さ、幅、及び長さは、適宜選択することができる。特に、圧延板の厚さは0.02mm以上3.0mm以下、更に0.1mm以上1mm以下、圧延板の幅は50mm以上2000mm以下、更に100mm以上、とりわけ200mm以上が利用し易いと考えられる。200mm以上といった広幅材とすることで、大型なプレス加工材を連続的に製造可能である。長尺材や広幅材を巻き取った圧延コイル材は、上記プレス加工材の量産に好適に利用することができる。   The thickness, width, and length of the rolled plate can be appropriately selected. In particular, the thickness of the rolled plate is 0.02 mm or more and 3.0 mm or less, more preferably 0.1 mm or more and 1 mm or less, and the width of the rolled plate is 50 mm or more and 2000 mm or less, further 100 mm or more, especially 200 mm or more. By using a wide material such as 200 mm or more, large press-processed materials can be manufactured continuously. A rolled coil material obtained by winding a long material or a wide material can be suitably used for mass production of the pressed material.

上記圧延は、潤滑剤を適宜利用すると、圧延時の摩擦抵抗を低減でき、素材の焼き付きなどを防止して圧延を施し易い。   In the above rolling, if a lubricant is appropriately used, the frictional resistance during rolling can be reduced, and the material can be easily rolled by preventing seizure of the material.

上記圧延後に得られた圧延コイル材にそのまま矯正加工を施してもよいが、矯正前に研削処理を施して、圧延板の表面に存在する疵や付着している加工油(例えば、潤滑剤)、上記表面に形成された酸化層などを除去して、上記表面を清浄かつ平滑にすることができる。このような表面性状に優れる板状材は、矯正加工を均一的に施し易く、特に、冷間にて矯正加工を施す場合にも十分に矯正することができて好ましい。研削処理は、例えば、研削ベルトを用いた湿式処理が挙げられる。ここでは、上記湿式研削処理を施した圧延コイル材を素材板100としている。   The rolled coil material obtained after the rolling may be subjected to straightening as it is, but is subjected to a grinding treatment before straightening, and wrinkles present on the surface of the rolled plate and attached processing oil (for example, lubricant) The oxide layer and the like formed on the surface can be removed to clean and smooth the surface. Such a plate-like material having excellent surface properties is preferable because it can be easily subjected to straightening processing, and can be sufficiently straightened even when the straightening processing is performed in a cold state. Examples of the grinding process include a wet process using a grinding belt. Here, the rolled coil material subjected to the wet grinding process is used as the material plate 100.

上記溶体化処理以降の最終製品(プレス加工が施されたマグネシウム合金材)が得られるまでの製造工程において、素材を150℃〜300℃の温度域に保持する総合計時間が12時間以下となるように、素材の温度管理を行うと、耐食性、耐衝撃性、強度、靭性といった特性に優れるマグネシウム合金材を得易い。   In the manufacturing process until the final product (magnesium alloy material subjected to press working) after the solution treatment is obtained, the total time for maintaining the material in the temperature range of 150 ° C. to 300 ° C. is 12 hours or less. As described above, when the temperature of the material is controlled, it is easy to obtain a magnesium alloy material having excellent characteristics such as corrosion resistance, impact resistance, strength, and toughness.

(繰出しドラム/巻取りドラム)
上記圧延コイル材は繰出しドラム50に配置され、繰出しドラム50により素材板100を繰り出す。また、ここでは、この素材板100に矯正加工を施した矯正板110から最終的に得られるマグネシウム合金材10を打ち抜いた残り(マグネシウム合金材10を抜き取ることで、複数の窓部が設けられた状態となった帯状材(スクラップ120))を巻取りドラム(図示せず)で巻き取る構成としている。繰出しドラム50及び巻取りドラムがモータなどの動力源により回転することで、素材板100〜矯正板110〜スクラップ120は、両ドラム間を走行する。スクラップ120を巻き取らない構成とすることもできる。この場合、ラインの適宜な箇所に素材板100などの搬送を促す送り出しローラなどを配置することで、素材板100や矯正板110を走行させることができる。また、スクラップ120は、マグネシウム合金材10を打ち抜いた後、或いは打ち抜きと同時に適宜切断されるように後述するプレス機構の打抜金型を構成してもよい。この形態のようにスクラップ120を巻き取る構成とすると、スクラップ120に形成された窓部によりマグネシウム合金材10を押すことで当該合金材10を搬送できる。
(Feeding drum / winding drum)
The rolled coil material is disposed on the feeding drum 50 and the material plate 100 is fed by the feeding drum 50. In addition, here, the remainder obtained by punching out the magnesium alloy material 10 finally obtained from the straightening plate 110 obtained by straightening the material plate 100 (a plurality of windows are provided by extracting the magnesium alloy material 10). The belt-shaped material (scrap 120) in a state is wound up by a winding drum (not shown). When the feeding drum 50 and the winding drum are rotated by a power source such as a motor, the material plate 100 to the correction plate 110 to the scrap 120 travel between the two drums. The scrap 120 may not be wound up. In this case, the material plate 100 and the correction plate 110 can be made to travel by disposing a delivery roller or the like for encouraging the conveyance of the material plate 100 or the like at an appropriate position in the line. Further, the scrap 120 may constitute a punching die of a press mechanism, which will be described later, so as to be appropriately cut after the magnesium alloy material 10 is punched or simultaneously with the punching. When the scrap 120 is wound up as in this embodiment, the alloy material 10 can be transported by pushing the magnesium alloy material 10 through a window portion formed in the scrap 120.

(矯正機構:冷間)
矯正加工は、圧延後、圧延板を巻き取ることで当該圧延板に付いた巻き癖や幅方向の反りの修正などの平坦性の向上、かつせん断帯の維持による良好な塑性加工性の保持を目的として行う。特に、実施形態1の製造方法では、矯正加工時の素材の温度を冷間、代表的には室温とすることで、圧延により導入された歪みが当該矯正により実質的に解放されず、素材にせん断帯が十分に存在して塑性加工性に優れる矯正板110を形成できる。また、矯正に当たり、加熱のための設備や加熱時間、及び加熱のためのエネルギーが不要である。
(Correction mechanism: cold)
In the straightening process, after rolling, the rolled sheet is rolled up to improve flatness such as correction of curling wrinkles and warpage in the width direction of the rolled sheet, and to maintain good plastic workability by maintaining a shear band. Do as a purpose. In particular, in the manufacturing method of Embodiment 1, the temperature of the material during straightening is cold, typically room temperature, so that the distortion introduced by rolling is not substantially released by the straightening, and the material The correction plate 110 having a sufficient shear band and excellent plastic workability can be formed. Further, in the correction, heating equipment, heating time, and heating energy are unnecessary.

上記矯正加工は、対角線上に配置された一対の矯正ローラ間を少なくとも一組通過させて曲げを付与することで行うことが挙げられる。例えば、特許文献1に記載される歪み付与手段やローラレベラ装置を利用することができる。   The straightening process may be performed by passing at least one pair between a pair of straightening rollers arranged on a diagonal line and applying bending. For example, a strain applying means and a roller leveler device described in Patent Document 1 can be used.

矯正機構20Aは、上下に対向して千鳥状に配置された複数の矯正ローラ21を具える(図1,2の矯正ローラの数は例示である)。走行する素材板100は、矯正ローラ21間を通過することで、当該ローラ21により連続的に曲げ(歪)が付与されて、反りや曲げ癖などが矯正されて平坦になる。矯正ローラ21の大きさ(径)、通過させる矯正ローラ21の数、ギャップ量(素材の進行方向に沿って配置される矯正ローラのうち、素材の一面に接する矯正ローラであって、素材の進行方向に隣り合う二つの矯正ローラの接線をとったとき、この接線と、これら二つの矯正ローラ間に介在されて素材の他面に接する矯正ローラ(以下、介在ローラと呼ぶ)において素材と接する側の点(以下、点xと呼ぶ)との間の最大距離)、素材板100の進行方向に隣り合う矯正ローラ21間の距離、といった矯正に関する各パラメータは、素材板100の組成、表面状態、厚さ、走行速度、といった素材板に関する各パラメータを考慮して適宜選択することができる。例えば、矯正ローラの径:φ10mm〜50mm程度、矯正ローラの合計数:10本〜40本程度、最大ギャップ量(ギャップ量の最大値):+4.0mm〜0mm程度(介在ローラの点xが上記接線よりも上記二つの矯正ローラ側に位置する場合をプラス、介在ローラの点xが上記接線から、上記二つの矯正ローラから離れる側に位置する場合をマイナスとする。最大ギャップ量が0mmの場合、素材板はその板厚だけ押し込まれる。マイナスの最大ギャップ量は、通常、素材板の板厚とする(この場合、素材板は実質的に押し込まれない)。)が挙げられる。矯正加工後に得られる矯正板の平坦度や矯正板に存在するせん断帯の量の調整は、上記矯正に関する各パラメータや素材板に関する各パラメータを調製することで行える。   The correction mechanism 20A includes a plurality of correction rollers 21 arranged in a zigzag pattern so as to face each other in the vertical direction (the number of correction rollers in FIGS. 1 and 2 is an example). As the traveling material plate 100 passes between the correction rollers 21, bending (distortion) is continuously applied by the rollers 21, and warpage, bending wrinkles, and the like are corrected and become flat. The size (diameter) of the straightening roller 21, the number of straightening rollers 21 to be passed, the gap amount (among the straightening rollers arranged along the material traveling direction, the straightening roller in contact with one surface of the material, When the tangent of two straightening rollers adjacent in the direction is taken, this tangent and the side of the straightening roller that is interposed between these two straightening rollers and touches the other surface of the material (hereinafter referred to as intervening roller) is in contact with the material (The maximum distance between the points (hereinafter referred to as point x)), the distance between the correction rollers 21 adjacent to each other in the traveling direction of the material plate 100, the parameters relating to correction are the composition, surface state, It can be appropriately selected in consideration of each parameter relating to the material plate such as thickness and traveling speed. For example, straightening roller diameter: φ10mm ~ 50mm, total number of straightening rollers: 10 ~ 40, maximum gap amount (maximum gap amount): + 4.0mm ~ 0mm (intermediate roller point x is above The case where it is located on the two straightening rollers side from the tangent line is plus, and the case where the point x of the intervening roller is located on the side away from the two straightening rollers from the tangent line is minus. The maximum negative gap amount is usually the thickness of the material plate (in this case, the material plate is not substantially pushed in). Adjustment of the flatness of the correction plate obtained after the correction processing and the amount of the shear band existing in the correction plate can be performed by adjusting the parameters relating to the correction and the parameters relating to the material plate.

(予熱機構)
実施形態1の製造方法では、矯正加工を冷間で行うため、素材である矯正板110は、圧延によって導入された歪み(せん断帯)が十分に残存しており、プレス加工時に動的再結晶化が生じ、塑性加工性に優れる。従って、プレス加工材の形状や素材の組成によっては、矯正板110をそのままプレス機構40に導入して、冷間でプレス加工を行うことができる。これに対して、図1に示すように、プレス機構40の上流側に予熱機構30を具えて矯正板110を加熱可能な構成とすると、プレス加工性を更に高められる。
(Preheating mechanism)
In the manufacturing method of Embodiment 1, since the straightening process is performed cold, the straightening plate 110 that is a raw material has a sufficient amount of distortion (shear band) introduced by rolling, and is dynamically recrystallized during press working. And the plastic workability is excellent. Therefore, depending on the shape of the pressed material and the composition of the material, the correction plate 110 can be introduced into the pressing mechanism 40 as it is, and the pressing can be performed cold. On the other hand, as shown in FIG. 1, when the preheating mechanism 30 is provided on the upstream side of the press mechanism 40 and the correction plate 110 can be heated, the press workability can be further improved.

予熱機構30は、走行する矯正板110を加熱可能な種々の形態の加熱手段を利用できる。例えば、所定の温度の温風が充填される雰囲気炉、矯正板110を直接通電して抵抗加熱により加熱する通電加熱手段、矯正板110を電磁誘導により加熱する高周波加熱手段などが利用できる。   The preheating mechanism 30 can use various types of heating means capable of heating the traveling correction plate 110. For example, an atmospheric furnace filled with warm air of a predetermined temperature, an energizing heating unit that directly energizes the correction plate 110 and heats it by resistance heating, a high-frequency heating unit that heats the correction plate 110 by electromagnetic induction, and the like can be used.

予熱機構30による素材(矯正板110)の加熱温度は、特に、200℃〜300℃とすると、素材の塑性加工性を高められて好ましい。素材が所望の温度となるように、予熱機構30の温度調節や素材の走行速度などを調整するとよい。   The heating temperature of the material (correcting plate 110) by the preheating mechanism 30 is particularly preferably 200 ° C. to 300 ° C., because the plastic workability of the material is improved. The temperature adjustment of the preheating mechanism 30 and the travel speed of the material may be adjusted so that the material has a desired temperature.

プレス加工材の形状や素材の組成などによって、室温超200℃未満の比較的低温でもプレス加工が可能である場合、上記予熱機構30を小型にしたり、加熱能力が小さいものを利用したりすることができる。   Depending on the shape of the pressed material and the composition of the material, if pre-working is possible even at relatively low temperatures above room temperature and below 200 ° C, the preheating mechanism 30 should be downsized or one with a small heating capacity should be used. Can do.

矯正板110は、予熱機構30により加熱されることで、歪み(せん断帯)が解放され得るが、予熱機構30の滞在時間が非常に短い場合、予熱機構30による歪みの解放は実質的に無視できる程度であると期待される。上記滞在時間が過度に長くならないように、素材の走行速度や予熱機構30の大きさ、温度などを調整することが好ましい。矯正板110の厚さが1mm以下と薄い場合、所望の温度に短時間で加熱できるため、滞在時間を短くし易い。   The straightening plate 110 is heated by the preheating mechanism 30 so that the strain (shear band) can be released. However, if the residence time of the preheating mechanism 30 is very short, the release of the strain by the preheating mechanism 30 is substantially ignored. Expected to be possible. It is preferable to adjust the travel speed of the material, the size of the preheating mechanism 30, the temperature, and the like so that the stay time is not excessively long. When the thickness of the correction plate 110 is as thin as 1 mm or less, the staying time can be easily shortened because it can be heated to a desired temperature in a short time.

予熱機構30を通過後、加熱状態を保持できるように、予熱機構30とプレス機構40との間に、断熱材料からなる保温カバー(図示せず)などを配置してもよい。   A heat insulation cover (not shown) made of a heat insulating material may be disposed between the preheating mechanism 30 and the press mechanism 40 so that the heated state can be maintained after passing through the preheating mechanism 30.

(プレス機構)
矯正板110は、巻き取られることなくそのままプレス機構40に移行され、プレス機構40により順送プレス加工が施される。ここで、一般的な順送プレス装置では、複数の金型が素材の走行方向に沿って多段に配置された金型ブロックを具え、走行する素材に各金型により少しずつ成形を行って、最終成形体を形成する。上記金型ブロックは、例えば、素材の進行方向の上流側に、素材の成形領域と成形領域以外の箇所とを、連結箇所を残して切り離す、という打ち抜き加工を行う初期打抜金型、中間に、適宜な形状に成形を行う少なくとも一つの成形金型、下流側に、成形領域に形成されたプレス加工材(マグネシウム合金材)とスクラップとを最終的に切り離す最終打抜金型を具える形態が代表的である。図1に示すプレス機構40は、初期打抜金型41と、成形金型42と、最終打抜金型43とを具える形態を示す。各金型41〜43は、矯正板110を打ち抜いたり、成形したりする上金型41u〜43u及び下金型41d〜43dと、矯正板110における成形領域以外の箇所を支持する支持部(図示せず)と、金型の開閉動作(ここでは上下方向の移動)をガイドする複数のガイドピン(図示せず)とを具える。プレス機構40は、所望の成形が可能な適宜な金型を具えるように構築するとよい。
(Press mechanism)
The correction plate 110 is transferred to the press mechanism 40 as it is without being wound, and subjected to progressive press processing by the press mechanism 40. Here, in a general progressive press device, a plurality of dies are provided with a die block arranged in multiple stages along the running direction of the material, and the material to be run is molded little by little with each die, A final molded body is formed. The die block is, for example, an initial punching die that performs a punching process in which a forming region of a material and a portion other than the forming region are separated leaving a connecting portion on the upstream side in the moving direction of the material. A form having at least one mold for forming into an appropriate shape, and a final punching mold for finally separating the pressed material (magnesium alloy material) and scrap formed in the forming region on the downstream side Is representative. The press mechanism 40 shown in FIG. 1 has a form including an initial punching die 41, a molding die 42, and a final punching die 43. Each mold 41 to 43 is an upper mold 41u to 43u and lower mold 41d to 43d for punching or molding the correction plate 110, and a support portion for supporting a portion other than the molding region in the correction plate 110 (FIG. (Not shown) and a plurality of guide pins (not shown) for guiding the opening / closing operation (in this case, vertical movement) of the mold. The press mechanism 40 may be constructed so as to include an appropriate mold capable of performing desired molding.

素材(矯正板110)の加熱に加えて、上記金型ブロックに具える各金型41〜43、特に成形金型42に加熱手段を具えておくと、素材の塑性加工性を高められて、プレス加工をより精度良く行える。   In addition to heating the material (correcting plate 110), if each die 41 to 43 provided in the above-mentioned die block, especially the molding die 42 is provided with a heating means, the plastic workability of the material can be improved, Press work can be performed with higher accuracy.

その他、プレス機構40の上流側には、プレス機構40に導入される矯正板110の直進性を高めるために走行ガイドなどを設けることができる。   In addition, a travel guide or the like can be provided on the upstream side of the press mechanism 40 in order to improve the straightness of the correction plate 110 introduced into the press mechanism 40.

プレス機構40の下流側には、図示しない巻取りドラムを具え、マグネシウム合金材10が切り離されたスクラップ120を巻き取る。この巻き取りによって走行するスクラップ120の窓部内に存在するマグネシウム合金材10は、上述のようにこの窓部に押されて巻取りドラム側に順次搬送される。従って、巻取りドラムの直前或いは上流側に、プレス加工材の回収箇所を設けておくことで、マグネシウム合金材10を容易に回収することができる。   A winding drum (not shown) is provided on the downstream side of the pressing mechanism 40, and the scrap 120 from which the magnesium alloy material 10 has been cut is wound. As described above, the magnesium alloy material 10 present in the window portion of the scrap 120 traveling by the winding is pushed by the window portion and sequentially conveyed to the winding drum side. Therefore, the magnesium alloy material 10 can be easily recovered by providing a press-processed material recovery point immediately before or upstream of the winding drum.

なお、矯正加工の速度とプレス加工の速度とが異なる場合がある。このような場合、撓みを適宜とって素材の走行速度の調整を行うとよい。例えば、矯正加工の速度よりもプレス加工の速度が遅い場合には、矯正板110をプレス機構40に導入する前に図1に示すように矯正板110を撓ませるとよい。この場合、プレス機構40の上流側(ここでは、予熱機構30とプレス機構40との間)にピンチローラ60といった送りローラを配置することで、撓ませた矯正板110をプレス機構40に適切に送り出すことができる。   Note that the straightening speed and the pressing speed may be different. In such a case, it is advisable to adjust the travel speed of the material by appropriately taking a bend. For example, when the speed of press processing is slower than the speed of correction processing, the correction plate 110 may be bent as shown in FIG. In this case, by arranging a feed roller such as a pinch roller 60 on the upstream side of the press mechanism 40 (here, between the preheating mechanism 30 and the press mechanism 40), the bent correction plate 110 is appropriately applied to the press mechanism 40. Can be sent out.

〔試験例1〕
上述した実施形態1の本発明マグネシウム合金材の製造方法に基づいて、マグネシウム合金材を作製した。
[Test Example 1]
Based on the above-described method for producing a magnesium alloy material of the present invention of Embodiment 1, a magnesium alloy material was produced.

この試験では、AZ91合金相当の組成(Mg-8.7%Al-0.65%Zn(全て質量%))のマグネシウム合金の溶湯を用意して、双ロール連続鋳造機により、厚さ5mmの鋳造板を連続して作製して、一旦巻き取り、鋳造コイル材を作製した。この鋳造コイル材をバッチ炉に装入して400℃×24時間の溶体化処理を施した。得られた固溶コイル材を巻き戻して、以下の条件で複数パスの圧延を施して巻き取り、厚さ0.61mm、幅250mm、長さ800mの圧延コイル材を作製した。ここでは、更に、得られた圧延コイル材を巻き戻して、研削ベルト(粒度:#240〜#320が好適に利用できる)により湿式研削処理を施した後、巻き取った研磨コイル材を用意した(厚さ:0.60mm)。   In this test, a molten magnesium alloy with a composition equivalent to AZ91 alloy (Mg-8.7% Al-0.65% Zn (all mass%)) was prepared, and a 5mm thick cast plate was continuously produced by a twin roll continuous casting machine. And wound up to produce a cast coil material. The cast coil material was charged into a batch furnace and subjected to a solution treatment at 400 ° C. for 24 hours. The obtained solid solution coil material was unwound and rolled by multiple passes under the following conditions to produce a rolled coil material having a thickness of 0.61 mm, a width of 250 mm, and a length of 800 m. Here, the obtained rolled coil material was further rewound and subjected to a wet grinding process with a grinding belt (grain size: # 240 to # 320 can be suitably used), and then a wound coil material was prepared. (Thickness: 0.60mm).

[圧延条件]
圧下率:5%/パス〜40%/パス
素材の加熱温度:150℃〜280℃
圧延ロール温度:100℃〜250℃
[Rolling conditions]
Reduction ratio: 5% / pass to 40% / pass Material heating temperature: 150 ° C to 280 ° C
Rolling roll temperature: 100 ℃ ~ 250 ℃

上記研削を施した圧延コイル材(研磨コイル材)を繰出しドラム50に配置して巻き戻し、素材板100(ここでは、湿式研削が施された圧延板)に冷間(室温(20℃〜25℃程度)、大気雰囲気)で矯正加工を施した。ここでは、最大ギャップ量:+1.0mmとなるようにローラ径が等しい複数の矯正ローラ21を千鳥状に配置して矯正機構を構築し(ローラ径:50mm程度、20本程度)、走行する素材板100にこれら矯正ローラ21間を通過させることで、上記矯正加工を施した。得られた矯正板110に引き続いて順送プレス加工を施し、矩形箱状のマグネシウム合金材10を300個作製した(側面と底面とを繋ぐ角部の曲げ半径:2.0mm、隣接する側面を繋ぐ角部の曲げ半径:0.9mm、絞り深さ:5.0mm)。プレス加工には市販の潤滑剤を用いた。潤滑剤の使用に代えて潤滑性に優れる潤滑シートを利用することができる。例えば、ポリテトラフルオロエチレンといったフッ素樹脂からなり、厚さ:20μm〜100μm程度のものが挙げられる。この潤滑シートを繰出しボビンに配置して繰り出し、走行する矯正板において少なくとも成形領域を覆うように当該シートを配置し、矯正板の成形領域からプレス加工材が打ち抜かれるときに同時に潤滑シートにおける上記成形領域を覆う箇所が打ち抜かれた残り(スクラップ120と同様に、複数の窓部が設けられた状態となった帯状材)を巻取りボビンにより巻き取る構成とすると、潤滑シートを容易に配置・除去することができる。また、潤滑シートを利用すると、得られたプレス加工材に対して、潤滑剤の除去といった後処理が不要である。   The rolled coil material (polished coil material) subjected to the above grinding is placed on the feeding drum 50 and rewound, and cold (room temperature (20 ° C. to 25 ° C. to 25 ° C.)) on the material plate 100 (here, the rolled plate subjected to wet grinding). Correction processing was performed in the atmosphere). Here, a straightening mechanism is constructed by arranging a plurality of straightening rollers 21 with the same roller diameter in a staggered manner so that the maximum gap amount is +1.0 mm (roller diameter: about 50 mm, about 20), and the material to run By passing the plate 100 between the correction rollers 21, the correction processing was performed. The resulting straightening plate 110 was subsequently subjected to progressive press processing to produce 300 rectangular box-shaped magnesium alloy materials 10 (the bending radius of the corner portion connecting the side surface and the bottom surface: 2.0 mm, connecting adjacent side surfaces) Bending radius of corner: 0.9mm, drawing depth: 5.0mm). A commercially available lubricant was used for the press working. Instead of using a lubricant, a lubricating sheet having excellent lubricity can be used. For example, it is made of a fluororesin such as polytetrafluoroethylene and has a thickness of about 20 μm to 100 μm. The lubricating sheet is placed on the feeding bobbin and fed out, and the sheet is arranged so as to cover at least the molding region in the traveling correction plate, and at the same time when the press working material is punched out from the molding region of the correction plate, the molding in the lubricating sheet is performed. When the part that covers the area is punched out (similar to the scrap 120, a strip-like material provided with a plurality of windows) is wound up by a winding bobbin, the lubricating sheet can be easily placed and removed. can do. In addition, when a lubricating sheet is used, post-processing such as removal of the lubricant is not required for the obtained press-processed material.

得られたマグネシウム合金材10を目視により確認したところいずれも割れなどが無かった。また、得られたマグネシウム合金材10の寸法を調べたところ、いずれも寸法誤差が±0.1mm以内であり、寸法精度に優れていた。   When the obtained magnesium alloy material 10 was visually confirmed, there was no crack or the like. Further, when the dimensions of the obtained magnesium alloy material 10 were examined, the dimension error was within ± 0.1 mm, and the dimensional accuracy was excellent.

<効果>
本発明製造方法は、長尺材を巻き取った圧延コイル材を素材としながらも、順送プレス加工に導入する直前に矯正加工を行い、そのままプレス加工を施す。即ち、巻き癖や反りなどが矯正されて平坦性に優れる状態の矯正板に連続してプレス加工を施すため、本発明製造方法は、寸法精度に優れるプレス加工材を連続的に製造することができる。従って、本発明製造方法は、プレス加工材といったマグネシウム合金材を生産性良く製造することができる。
<Effect>
In the manufacturing method of the present invention, while a rolled coil material obtained by winding a long material is used as a raw material, a correction process is performed immediately before being introduced into a progressive press process, and the press process is performed as it is. That is, in order to continuously press the correction plate in a state where the curl and warp are corrected and excellent in flatness, the manufacturing method of the present invention can continuously manufacture a pressed material with excellent dimensional accuracy. it can. Accordingly, the production method of the present invention can produce a magnesium alloy material such as a press-worked material with high productivity.

特に、実施形態1の製造方法では、冷間で矯正を施すことで、得られた矯正板は、圧延時に導入された歪み(せん断帯)が矯正加工時に解放され難く、当該歪みが十分に残存した状態である。従って、上記矯正板は、プレス時、連続的に再結晶化を生じることができ、塑性加工性に優れる。このことからも本発明製造方法は、高精度にプレス加工材を製造できるため、寸法不良品を低減でき、マグネシウム合金材の生産性に優れる。また、実施形態1の製造方法は、プレス加工前に予熱を行って素材の塑性加工性を高めているため、より精度良くプレス加工材を製造でき、このことからもマグネシウム合金材の生産性に優れる。   In particular, in the manufacturing method of Embodiment 1, the correction plate obtained by performing cold correction is difficult to release distortion (shear band) introduced during rolling during correction, and the distortion remains sufficiently. It is in the state. Therefore, the correction plate can continuously recrystallize during pressing, and is excellent in plastic workability. Also from this fact, the production method of the present invention can produce a press-worked material with high accuracy, so that defective products can be reduced, and the productivity of the magnesium alloy material is excellent. In addition, since the manufacturing method of Embodiment 1 increases the plastic workability of the material by preheating before pressing, the pressed material can be manufactured with higher accuracy, which also increases the productivity of the magnesium alloy material. Excellent.

なお、本発明製造方法の一形態として、上述のように圧延コイル材を用意し、巻き戻した素材板に上述のように研削処理を順次施し、引き続いて上記冷間矯正加工を施す形態とすることができる。この場合、研削後の巻き取りを省略することができ、作業効率を更に向上できるため、マグネシウム合金材の生産性を更に向上することができる。   In addition, as one form of the manufacturing method of the present invention, a rolled coil material is prepared as described above, and the unrolled material plate is sequentially subjected to the grinding treatment as described above, and subsequently the cold correction process is performed. be able to. In this case, the winding after grinding can be omitted and the working efficiency can be further improved, so that the productivity of the magnesium alloy material can be further improved.

[実施形態2]
以下、図2を参照して、実施形態2に係るマグネシウム合金材の製造方法を説明する。図2において図1と同一符号は同一名称物を示す。この製造方法は、基本的構成は実施形態1の製造方法と同様であり、マグネシウム合金からなる圧延コイル材を巻き戻した素材板に、矯正加工、順送プレス加工を連続して施して、プレス加工が施されたマグネシウム合金材を製造する方法に係るものである。実施形態2の製造方法では、矯正加工を温間で行い、プレス加工にあたり矯正板の予備加熱を行わない点が主たる相違点である。以下、この相違点を詳細に説明し、実施形態1と重複する構成及び効果の詳細な説明は省略する。
[Embodiment 2]
Hereinafter, a method for manufacturing a magnesium alloy material according to Embodiment 2 will be described with reference to FIG. 2, the same reference numerals as those in FIG. 1 denote the same names. In this manufacturing method, the basic configuration is the same as that of the manufacturing method of the first embodiment, and a straightening process and a progressive press process are continuously performed on a material plate obtained by rewinding a rolled coil material made of a magnesium alloy, and a press is performed. The present invention relates to a method for producing a processed magnesium alloy material. The main difference between the manufacturing method of Embodiment 2 is that the straightening process is performed warmly and the preheating of the straightening plate is not performed during the pressing process. Hereinafter, this difference will be described in detail, and a detailed description of the configuration and effects that are the same as those in Embodiment 1 will be omitted.

(矯正機構:温間)
矯正機構20Bは、実施形態1の矯正機構20Aと同様に千鳥状に配置された複数の矯正ローラ21と、これら矯正ローラ21を収納し、走行する素材板100を加熱状態に保持可能な保温容器22とを具える。この形態では、素材板100は、バッチ炉などで所定の温度に予め加熱しておく。そして、予熱した素材板100を矯正機構20Bの矯正ローラ21に導入させる。或いは、上記保温容器22の上流側に、走行する素材板100を所定の温度に予熱する加熱機構(図示せず)を具える形態とすることができる。この加熱機構には、実施形態1で説明した予熱機構30と同様の構成のものを利用することができる。そして、加熱機構を通過した素材板が矯正機構20Bの矯正ローラ21に導入されるように構築する。或いは、保温容器22に代えて、走行する素材板100を加熱可能な加熱容器を具える形態とすることができる。この加熱容器には、実施形態1で説明した予熱機構30と同様の構成のものを利用することができる。そして、加熱容器に素材板を導入させて加熱すると共に、この加熱容器内の矯正ローラ21により加熱された素材板に矯正を施す。
(Correction mechanism: warm)
The straightening mechanism 20B includes a plurality of straightening rollers 21 arranged in a staggered manner as in the straightening mechanism 20A of the first embodiment, and a heat retaining container that houses the straightening rollers 21 and can hold the traveling material plate 100 in a heated state. With 22 and so on. In this embodiment, the material plate 100 is preheated to a predetermined temperature in a batch furnace or the like. Then, the preheated material plate 100 is introduced into the correction roller 21 of the correction mechanism 20B. Alternatively, a heating mechanism (not shown) for preheating the traveling material plate 100 to a predetermined temperature can be provided on the upstream side of the heat retaining container 22. As this heating mechanism, the same structure as the preheating mechanism 30 described in the first embodiment can be used. Then, the material plate that has passed through the heating mechanism is constructed so as to be introduced into the correction roller 21 of the correction mechanism 20B. Alternatively, instead of the heat retaining container 22, a heating container capable of heating the traveling material plate 100 can be provided. As this heating container, one having the same configuration as the preheating mechanism 30 described in the first embodiment can be used. Then, the material plate is introduced into the heating container and heated, and the material plate heated by the correction roller 21 in the heating container is corrected.

素材板100の加熱温度は100℃以上とすると塑性変形性を高められ、矯正を十分に行えて、平坦性に優れる矯正板が得られる。上記加熱温度が高いほど素材の塑性加工性を高められるが、350℃超では、圧延により導入された歪みが当該加熱により解放されて素材に十分に残存できず、プレス加工性の低下を招く。従って、素材の加熱温度は、100℃以上350℃以下、特に150℃以上300℃以下が好ましい。また、矯正ローラも加熱してもよい。矯正ローラの加熱温度は、150℃〜300℃が挙げられ、矯正時の素材板の最高温度が矯正ローラの温度と同等程度となるように、素材の加熱温度や走行速度、ローラの温度などを調整することが好ましい。   When the heating temperature of the material plate 100 is 100 ° C. or higher, the plastic deformability can be improved, correction can be sufficiently performed, and a correction plate having excellent flatness can be obtained. The higher the heating temperature, the higher the plastic workability of the material. However, if it exceeds 350 ° C., the strain introduced by the rolling is released by the heating and cannot remain sufficiently in the material, leading to a decrease in press workability. Accordingly, the heating temperature of the material is preferably 100 ° C. or higher and 350 ° C. or lower, particularly 150 ° C. or higher and 300 ° C. or lower. The correction roller may also be heated. The heating temperature of the straightening roller can range from 150 ° C to 300 ° C. The heating temperature, running speed, roller temperature, etc. of the material should be adjusted so that the maximum temperature of the blank during straightening is comparable to the temperature of the straightening roller. It is preferable to adjust.

なお、素材板の加熱温度を100℃未満とすることができる。この場合、素材が室温の場合よりも塑性変形性を向上できるため矯正を行い易くすることができる。   In addition, the heating temperature of a raw material board can be less than 100 degreeC. In this case, since the plastic deformability can be improved as compared with the case where the material is at room temperature, correction can be facilitated.

実施形態2の製造方法では、予熱された素材板100を矯正機構20Bの保温容器22に導入して、矯正ローラ21間を通過させることで矯正加工を施し、得られた矯正板110を巻き取ることなく、プレス機構40に導入して、矯正加工に連続して順送プレス加工を施ことで、マグネシウム合金材10を製造することができる。   In the manufacturing method of the second embodiment, the preheated raw material plate 100 is introduced into the heat retaining container 22 of the correction mechanism 20B, and is subjected to correction processing by passing between the correction rollers 21, and the resulting correction plate 110 is wound up. Without being introduced into the press mechanism 40, the magnesium alloy material 10 can be manufactured by performing the progressive press process continuously after the straightening process.

プレス加工材の形状や素材の組成によっては、上述のように矯正板110をそのままプレス機構40に導入してプレス加工を行うことができる。この場合、矯正板110においてプレス機構40に導入される直前の温度は、室温から、矯正機構20Bを通過直後の温度までの任意の温度を取り得る。プレス加工が強加工(例えば、角部の曲げ半径が小さい形状、絞り深さが深い形状など)であったり、素材が塑性加工性に劣る組成からなる場合には、矯正機構20Bを経た矯正板110の温度が低下し難い構成とすることが好ましい。例えば、矯正板の走行速度やプレス機構40までの矯正板の長さ(撓み量など)を調整したり、矯正機構20Bからプレス機構40までの適宜な領域に断熱材料からなる保温カバーなどを配置したりすることが挙げられる。特に、プレス機構40に導入される直前において、矯正板110の温度が200℃〜300℃程度となるようにすることが好ましい。このように矯正工程時の熱をプレス加工時にも利用することでエネルギー効率がよく、プレス加工材の生産性の向上に寄与することができる。   Depending on the shape of the pressed material and the composition of the material, the correction plate 110 can be directly introduced into the pressing mechanism 40 as described above to perform the pressing. In this case, the temperature immediately before the correction plate 110 is introduced into the press mechanism 40 can be any temperature from room temperature to a temperature immediately after passing through the correction mechanism 20B. If the press work is a strong work (for example, a shape with a small bending radius at the corner or a shape with a deep drawing depth), or the material has a composition that is inferior in plastic workability, a straightening plate that has undergone the straightening mechanism 20B. It is preferable that the temperature of 110 is not easily lowered. For example, adjust the travel speed of the straight plate and the length of the straight plate up to the press mechanism 40 (amount of deflection, etc.), or place a heat insulation cover made of heat insulating material in an appropriate area from the straight mechanism 20B to the press mechanism 40. To do. In particular, it is preferable that the temperature of the correction plate 110 be about 200 ° C. to 300 ° C. immediately before being introduced into the press mechanism 40. Thus, energy efficiency is good by using the heat at the time of a correction process also at the time of a press work, and it can contribute to the improvement of the productivity of a press work material.

〔試験例2〕
上述した実施形態2の本発明マグネシウム合金材の製造方法に基づいて、マグネシウム合金材を作製した。
[Test Example 2]
Based on the above-described method for producing a magnesium alloy material of the present invention in Embodiment 2, a magnesium alloy material was produced.

この試験では、上述した試験例1で用意した圧延コイル材(Mg-8.7%Al-0.65%Zn(全て質量%))とほぼ同様の仕様の圧延コイル材:厚さ0.6mm、幅250mm、長さ800m、研削処理を施していないものを用意した。また、ここでは、最大ギャップ量:+1.0mmとなるようにローラ径が等しい複数の矯正ローラ21を千鳥状に配置し(ローラ径:50mm程度、20本程度)、これら矯正ローラを収納した保温容器を具える矯正機構を構築した。そして、用意した圧延コイル材を繰出しドラム50に配置して巻き戻し、走行する素材板100(湿式研削が施されていない圧延板)に上記矯正ローラ間を通過させることで、温間で矯正加工を施した。ここでは、素材板の温度:250℃、矯正ローラの温度:250℃とした。これら得られた矯正板110に引き続いて順送プレス加工を施し、試験例1と同様の仕様の矩形箱状のマグネシウム合金材10を300個作製した。順送プレスの条件は、試験例1と同様にした。   In this test, the rolled coil material having the same specifications as the rolled coil material prepared in Test Example 1 (Mg-8.7% Al-0.65% Zn (all mass%)): thickness 0.6mm, width 250mm, length We prepared 800m long and not ground. In addition, here, a plurality of straightening rollers 21 having the same roller diameter are arranged in a staggered manner so that the maximum gap amount is +1.0 mm (roller diameter: about 50 mm, about 20), and the heat retaining material containing these straightening rollers is stored. A straightening mechanism with a container was constructed. Then, the prepared rolled coil material is placed on the feeding drum 50 and rewound, and the material plate 100 (rolled plate that has not been wet-ground) traveling is passed between the correction rollers, so that the correction processing is warm. Was given. Here, the temperature of the material plate was 250 ° C., and the temperature of the straightening roller was 250 ° C. These straightening plates 110 thus obtained were subsequently subjected to progressive press processing, and 300 rectangular box-shaped magnesium alloy materials 10 having the same specifications as in Test Example 1 were produced. The conditions for the progressive press were the same as in Test Example 1.

得られたマグネシウム合金材10を目視により確認したところいずれも割れなどが無く、かついずれも寸法誤差が±1.0mm以内であり、寸法精度に優れていた。   When the obtained magnesium alloy material 10 was visually confirmed, there was no crack or the like, and in all cases, the dimensional error was within ± 1.0 mm, and the dimensional accuracy was excellent.

<効果>
実施形態2の製造方法も、長尺材を巻き取った圧延コイル材を素材としながらも、寸法精度に優れるプレス加工材を生産性よく製造できる。特に、実施形態2の製造方法では、温間で矯正していることで、上述のように研削処理などがなされておらず、表面性状に劣っていたり、反りが大きかったりなどする素材であっても、矯正加工を十分に施すことができ、平坦性に優れる矯正板が得られる。従って、実施形態2の製造方法も、平坦性に優れる素材をプレス機構の所定の位置に精度良く搬送してプレス加工を行え、高精度なマグネシウム合金材を生産性良く製造できる。また、実施形態2の製造方法は、矯正加工に引き続いて順送プレス加工を行うことで、矯正加工時の熱をプレス加工時にも利用でき、ある程度の加熱状態にある素材、即ち、塑性加工性に優れる状態にある素材に対してプレス加工を施すことができる。このことからも、実施形態2の製造方法は、素材にプレス加工を精度良く施せる上に、実施形態1のような予熱機構を省略することができる。
<Effect>
The manufacturing method of the second embodiment can also produce a press-worked material having excellent dimensional accuracy with high productivity while using a rolled coil material obtained by winding a long material. In particular, in the manufacturing method of Embodiment 2, since it is warmly corrected, it is a material that is not ground as described above, has poor surface properties, or has a large warp. However, it is possible to sufficiently perform the straightening process and to obtain a straightening plate having excellent flatness. Therefore, the manufacturing method of Embodiment 2 can also carry out press processing by accurately transporting a material having excellent flatness to a predetermined position of the press mechanism, and can manufacture a highly accurate magnesium alloy material with high productivity. In addition, the manufacturing method according to the second embodiment performs progressive press processing subsequent to correction processing, so that heat during correction processing can also be used during press processing, and a material in a certain heating state, that is, plastic workability. It is possible to perform press working on a material that is in an excellent state. For this reason as well, the manufacturing method of the second embodiment can accurately press the material, and can omit the preheating mechanism as in the first embodiment.

この形態においても素材となる圧延コイル材として、実施形態1で用意した素材板のように研削処理を施したものを利用することができる。   Also in this embodiment, as the rolled coil material that is a material, a material that has been ground like the material plate prepared in Embodiment 1 can be used.

なお、上述した実施の形態は、本発明の要旨を逸脱することなく、適宜変更することが可能であり、上述した構成に限定されるものではない。例えば、マグネシウム合金の組成(添加元素の種類、含有量)、素材となる圧延板の厚さ、幅、長さ、矯正加工の条件(素材・ローラの温度、ローラ径、ローラ数、ギャップ量など)、プレス加工の条件(形状、素材温度など)などを適宜変更することができる。また、例えば、温間矯正加工を行う形態において、上述した予熱機構を具えて、プレス加工前に矯正板を加熱する形態とすることができる。   The above-described embodiment can be appropriately changed without departing from the gist of the present invention, and is not limited to the above-described configuration. For example, composition of magnesium alloy (type and content of additive elements), thickness, width and length of rolled sheet material, straightening conditions (material / roller temperature, roller diameter, number of rollers, gap amount, etc.) ), Pressing conditions (shape, material temperature, etc.) can be changed as appropriate. Further, for example, in the form of performing warm correction processing, the above-described preheating mechanism can be provided, and the correction plate can be heated before press processing.

本発明マグネシウム合金材の製造方法は、プレス加工が施されてなるマグネシウム合金材、例えば、携帯用や小型な電気・電子機器類の筐体といった各種の電気・電子機器類の構成部材、自動車や航空機といった輸送機器の構成部材に利用されるマグネシウム合金材の製造に好適に利用することができる。   The method for producing a magnesium alloy material of the present invention includes a magnesium alloy material subjected to press working, for example, a component of various electric / electronic devices such as a portable or small-sized electric / electronic device casing, an automobile, It can utilize suitably for manufacture of the magnesium alloy material utilized for the structural member of transportation apparatuses, such as an aircraft.

10 マグネシウム合金材
20A,20B 矯正機構 21 矯正ローラ 22 保温容器
30 予熱機構
40 プレス機構 41 初期打抜金型 42 成形金型 43 最終打抜金型
41u,42u,43u 上金型 41d,42d,43d 下金型
50 繰出しドラム 60 ピンチローラ
100 素材板 110 矯正板 120 スクラップ
10 Magnesium alloy material
20A, 20B Straightening mechanism 21 Straightening roller 22 Thermal insulation container
30 Preheating mechanism
40 Press mechanism 41 Initial punching die 42 Molding die 43 Final punching die
41u, 42u, 43u Upper mold 41d, 42d, 43d Lower mold
50 Feeding drum 60 Pinch roller
100 Material plate 110 Straightening plate 120 Scrap

Claims (4)

マグネシウム合金からなる板材にプレス加工を施して、マグネシウム合金材を製造するマグネシウム合金材の製造方法であって、
長尺な圧延板が巻き取られた圧延コイル材を準備する準備工程と、
前記圧延コイル材を巻き戻して前記圧延板に矯正加工を施し、矯正板を作製する矯正工程と、
前記矯正板を巻き取ることなく、前記矯正加工に引き続いて順送プレス加工を施し、マグネシウム合金材を作製する成形工程とを具えることを特徴とするマグネシウム合金材の製造方法。
A method for producing a magnesium alloy material, in which a plate material made of a magnesium alloy is pressed to produce a magnesium alloy material,
A preparation step of preparing a rolled coil material in which a long rolled plate is wound;
A correction process for rewinding the rolled coil material and performing correction processing on the rolled plate to produce a correction plate;
A method for producing a magnesium alloy material comprising: a forming step of producing a magnesium alloy material by performing a progressive press process following the straightening process without winding the straightening plate.
前記矯正加工は、冷間で行い、
前記順送プレス加工前に、前記矯正板を加熱する予熱工程を具えることを特徴とする請求項1に記載のマグネシウム合金材の製造方法。
The straightening process is performed cold,
2. The method for producing a magnesium alloy material according to claim 1, further comprising a preheating step of heating the straightening plate before the progressive pressing.
前記矯正加工は、温間で行い、
前記順送プレス加工は、前記矯正板を更に加熱することなく行うことを特徴とする請求項1に記載のマグネシウム合金材の製造方法。
The straightening process is performed warmly,
2. The method for producing a magnesium alloy material according to claim 1, wherein the progressive pressing is performed without further heating the straightening plate.
前記マグネシウム合金は、Alを8.3質量%以上9.5質量%以下含有することを特徴とする請求項1〜3のいずれか1項に記載のマグネシウム合金材の製造方法。   The method for producing a magnesium alloy material according to any one of claims 1 to 3, wherein the magnesium alloy contains 8.3 mass% or more and 9.5 mass% or less of Al.
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KR20160060417A (en) * 2014-11-20 2016-05-30 주식회사 포스코 METHOD FOR MANUFACTURING the molded product of Magnesium plate
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US10472691B2 (en) 2014-08-12 2019-11-12 Thyssenkrupp Ag Hot-forming apparatus and method for producing press-hardened shaped components from steel sheet
CN105363864A (en) * 2014-08-12 2016-03-02 蒂森克虏伯钢铁欧洲股份公司 Hot-forming apparatus and method for producing press-hardened shaped components from steel sheet
KR20160060417A (en) * 2014-11-20 2016-05-30 주식회사 포스코 METHOD FOR MANUFACTURING the molded product of Magnesium plate
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US20170101705A1 (en) * 2015-10-08 2017-04-13 Novelis Inc. Optimization of aluminum hot working
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