JPH09155463A - Manufacture of metallic formed body - Google Patents
Manufacture of metallic formed bodyInfo
- Publication number
- JPH09155463A JPH09155463A JP7319105A JP31910595A JPH09155463A JP H09155463 A JPH09155463 A JP H09155463A JP 7319105 A JP7319105 A JP 7319105A JP 31910595 A JP31910595 A JP 31910595A JP H09155463 A JPH09155463 A JP H09155463A
- Authority
- JP
- Japan
- Prior art keywords
- auxiliary
- metal
- superplastic
- mold
- sheet
- 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
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、金属材料シート
から複雑な形状を有する均一な厚さの金属成形品、特に
縁を有する均一な厚さのチャンネル型金属成形品を従来
よりも簡単に製造する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention more easily manufactures a metal molded product having a complicated shape and a uniform thickness, in particular, a channel-shaped metal molded product having an edge and having a uniform thickness, from a metal material sheet. It is about how to do it.
【0002】[0002]
【従来の技術】一般に、超塑性成形される金属材料シー
トとして、チタン合金(Ti−6%Al−4%V)板、
アルミニウム合金(Al−33%Cu、Al−22%Z
n)板、銅合金(Cu−10%Mn)板、2相ステンレ
ス鋼板などが知られている。2. Description of the Related Art Generally, a titanium alloy (Ti-6% Al-4% V) plate is used as a metal sheet to be superplastically formed.
Aluminum alloy (Al-33% Cu, Al-22% Z
n) plate, copper alloy (Cu-10% Mn) plate, two-phase stainless steel plate and the like are known.
【0003】これら金属材料シートは、一般に、図17
に示されるように、型6および型6´の間に挟んでセッ
トされ、このセットされた装置全体を超塑性変形可能な
温度に加熱するとともに、成形に必要なガス反力に対抗
する力Lおよび端部拘束力L 1 を合計した強力なプレス
荷重L+L1 を型6にかけながら、供給通路13から圧
力流体を供給して静水圧を付加し、一方、ガス抜き孔9
から型6´内の空気を抜くことにより図18に示される
ような縁10の付いたチャンネル型超塑性成形品を製造
していた。These metal material sheets are generally shown in FIG.
As shown in FIG.
The entire set device can be superplastically deformed
Heats to the temperature and resists the gas reaction force required for molding
Force L and end restraint force L 1A powerful press
Load L + L1While applying pressure to the mold 6, pressure is applied from the supply passage 13.
A hydrostatic pressure is applied by supplying a force fluid, while the gas vent hole 9
Shown in FIG. 18 by evacuating the air in the mold 6 ′ from
Channel type superplastic molded products with edge 10 like
Was.
【0004】このように超塑性金属板の金属材料シート
1を型6および型6´の間にセットして超塑性成形する
と、金属材料シート1の周囲が型6および型6´で拘束
されて超塑性成形されるために、得られた成形品11は
厚さが局部的に薄肉化して不均一になる。また、特に金
属材料シート1と型6の間に流体を供給しながら超塑性
成形するために、金属材料シート1と型6の隙間から流
体が漏洩しないように、型6の上から成形に必要なガス
反力に対抗する力Lおよび端部拘束力L1 を合計した強
力なプレス荷重L+L1 をかけなければならず、この強
力なプレス荷重L+L1 に耐えるように型6および型6
´を頑丈に成形しなければならず、型の材料費も多くか
かり、製造コストも増加する。また、金属材料シート1
と型6の隙間から流体が漏洩しないように、型6の周囲
にガスシール用の突起12を設けているが、金属材料シ
ート1が極めて薄いと成形中に破れることがある。これ
を緩和するために成形速度を遅くしなければならないた
め、生産効率も低下する。As described above, when the metal material sheet 1 of the superplastic metal plate is set between the mold 6 and the mold 6'and superplastically molded, the periphery of the metal material sheet 1 is restrained by the mold 6 and the mold 6 '. Due to the superplastic forming, the thickness of the obtained molded product 11 is locally thinned and becomes non-uniform. Further, in particular, since superplastic forming is performed while supplying fluid between the metal material sheet 1 and the mold 6, it is necessary to perform molding from above the mold 6 so that the fluid does not leak from the gap between the metal material sheet 1 and the mold 6. A strong press load L + L 1 which is the sum of the force L against the gas reaction force and the end restraint force L 1 must be applied, and the mold 6 and the mold 6 must bear the strong press load L + L 1.
The ′ must be molded robustly, the material cost of the mold is high, and the manufacturing cost is increased. Also, the metal material sheet 1
A protrusion 12 for gas sealing is provided around the mold 6 so that the fluid does not leak from the gap between the mold 6 and the mold 6. However, if the metal material sheet 1 is extremely thin, it may be broken during molding. In order to alleviate this, the molding speed must be slowed down, so that the production efficiency also decreases.
【0005】これらの欠点を改良するために、図14に
示されるように、超塑性金属板を補助成形シート2とし
て用い、この補助成形シート2を型6および型6´の間
に周囲を拘束して載置し、さらに型6および型6´の間
の空間7に金属材料シート1を端部が拘束されないよう
に置き、次いで、超塑性変形する温度に加熱すると共に
プレス荷重L+L1 を型6にかけながら、図15に示さ
れるようにガスを供給通路15から供給し、補助成形シ
ート2を超塑性変形させ、さらに超塑性変形する補助成
形シート2を金属材料シート1に接触させながら、図1
6に示されるように、金属材料シート1を型6´の内面
7´に押し付けることにより成形品11を製造する方法
が提案されている(特公平2−36330号公報参
照)。この方法によると成形時に金属材料シート1の端
部が拘束されていないので金属材料シート1が破断する
ことはない。また、この方法によると、金属材料シート
1が超塑性金属板、非超塑性金属板、複数の孔を設けた
金属板、多孔質金属板、網状金属板または繊維状金属板
などの成形も可能であるといわれている。In order to remedy these drawbacks, as shown in FIG. 14, a superplastic metal plate is used as an auxiliary forming sheet 2, and this auxiliary forming sheet 2 is constrained between the mold 6 and the mold 6 '. Then, the metal material sheet 1 is placed in the space 7 between the mold 6 and the mold 6 ′ so that the ends thereof are not constrained, and then heated to a temperature at which it undergoes superplastic deformation and a press load L + L 1 is applied. While supplying the gas from the supply passage 15 as shown in FIG. 15, the auxiliary molding sheet 2 is superplastically deformed, and the superplastically deforming auxiliary molding sheet 2 is brought into contact with the metal material sheet 1 as shown in FIG. 1
As shown in FIG. 6, a method of manufacturing the molded product 11 by pressing the metal material sheet 1 against the inner surface 7 ′ of the mold 6 ′ has been proposed (see Japanese Patent Publication No. 2-36330). According to this method, since the end portion of the metal material sheet 1 is not constrained at the time of molding, the metal material sheet 1 does not break. Further, according to this method, the metal material sheet 1 can be formed into a superplastic metal plate, a non-superplastic metal plate, a metal plate having a plurality of holes, a porous metal plate, a mesh metal plate or a fibrous metal plate. It is said that
【0006】[0006]
【発明が解決しようとする課題】しかしながら、上記従
来の特公平2−36330号公報記載の超塑性成形法
は、(a)超塑性金属板で構成された補助成形シート2
を型6および型6´の間に拘束してセットし、供給通路
3から圧力流体を供給して補助成形シート2を超塑性変
形させつつ金属材料シート1を超塑性成形するので、補
助成形シート2を超塑性変形させる際に、金属材料シー
ト1と型6の隙間から流体が漏洩しないように、型6の
上から成形に必要なガス反力に対抗する力Lおよび端部
拘束力L1 を合計した強力なプレス荷重L+L1 をかけ
なければならず、この強力なプレス荷重L+L1 に耐え
るように型6および型6´を頑丈に作らなければなら
ず、また、型6の周囲にガスシール用の突起12を設け
るための精密な切削を必要とするために、型の製造コス
トが増加することに変わりはない、(b)補助成形シー
ト2が成形中に破断しないように成形速度を遅くしなけ
ればならない点で図17に示される従来法と変わるとこ
ろはない、(c)成形中は、図15に示されるように、
補助成形シート2は端部が突起12に拘束されながら成
形されるために、補助成形シート2の超塑性変形に際し
て補助成形シート2が金属材料シート1を段部14のコ
ーナーRにおいて拘束し、そこに摩擦力が生じ、得られ
た成形品11の厚さの不均化は避けられない、などの課
題があった。However, the conventional superplastic forming method disclosed in Japanese Patent Publication No. 2-36330 has (a) an auxiliary forming sheet 2 made of a superplastic metal plate.
Is set between the mold 6 and the mold 6 ′, and a pressure fluid is supplied from the supply passage 3 to superplastically deform the auxiliary forming sheet 2 and the metal material sheet 1 is superplastically formed. When superplastically deforming No. 2 in order to prevent fluid from leaking from the gap between the metal material sheet 1 and the mold 6, a force L against the gas reaction force necessary for molding and an end restraining force L 1 from above the mold 6 Must be applied with a strong press load L + L 1 , and the mold 6 and the mold 6 ′ must be made robust to withstand this strong press load L + L 1 , and the gas around the mold 6 must be Since the precision cutting for providing the protrusion 12 for sealing is required, the manufacturing cost of the mold is still increased. (B) The forming speed is set so that the auxiliary forming sheet 2 does not break during forming. Figure 17 in that you have to slow down There is no difference from the conventional method shown in Fig. 15, (c) during molding, as shown in Fig. 15,
Since the auxiliary forming sheet 2 is formed while the ends thereof are being restrained by the protrusions 12, the auxiliary forming sheet 2 restrains the metal material sheet 1 at the corner R of the step portion 14 when the auxiliary forming sheet 2 undergoes superplastic deformation. There is a problem in that frictional force is generated on the surface of the molded product 11 and unevenness of the thickness of the obtained molded product 11 cannot be avoided.
【0007】[0007]
【課題を解決するための手段】そこで、本発明者らは、
従来の特公平2−36330号公報記載の超塑性成形法
の課題を解決し、一層効率良く均一な肉厚の成形品、特
に縁付きの成形品を得るべく研究を行った結果、図1に
示されるように、少なくとも1枚が超塑性金属からなる
複数枚の補助成形シート2を積み重ねてそれらの周囲を
固着し気密にした成形補助体3を作製し、この成形補助
体3の超塑性金属からなる補助成形シート2を金属材料
シート1に対面するようにかつ成形補助体3の端部およ
び金属材料シート1の端部が拘束されないように型6と
型6´で構成された空間7内に設置し、次いで、図2に
示されるように、型6に成形に必要なガス反力に対抗す
るプレス荷重Lをかけながら成形補助体3の補助成形シ
ート2と補助成形シート2の隙間にガスを媒体導入口4
の給気パイプ8を通して導入することによって成形補助
体3を膨らませ、膨らんだ成形補助体3の超塑性金属か
らなる補助成形シート2を金属材料シート1に押しつ
け、さらに図3に示されるように、金属材料シート1を
型6´の内面7´に押しつけることにより金属材料シー
ト1を所定の形状に成形すると、従来よりも厚さが一層
均一な成形品、特に厚さが均一な縁付きの成形品11が
得られる、という知見を得たのである。Means for Solving the Problems Accordingly, the present inventors have:
As a result of conducting a study to solve the problems of the conventional superplastic forming method described in Japanese Patent Publication No. 2-36330 and to obtain a molded product having a uniform wall thickness more efficiently, in particular, a molded product with an edge, it is shown in FIG. As described above, a plurality of auxiliary forming sheets 2 at least one of which is made of a superplastic metal are stacked and the peripheral portions of the auxiliary forming sheets 2 are fixed to each other to form an airtight forming auxiliary body 3, which is formed from the superplastic metal of the forming auxiliary body 3. In the space 7 formed by the mold 6 and the mold 6 ′ so that the auxiliary forming sheet 2 facing the metal material sheet 1 and the end portion of the forming auxiliary body 3 and the end portion of the metal material sheet 1 are not constrained. Then, as shown in FIG. 2, the mold 6 is subjected to a press load L that opposes the gas reaction force required for molding, and gas is injected into the gap between the auxiliary molding sheet 2 and the auxiliary molding sheet 2 of the molding auxiliary body 3. The medium inlet 4
The auxiliary molding sheet 3 made of superplastic metal of the expanded auxiliary molding body 3 is pressed against the metal material sheet 1 by introducing the auxiliary molding material 3 through the air supply pipe 8 of the above, and as shown in FIG. When the metal material sheet 1 is molded into a predetermined shape by pressing the metal material sheet 1 against the inner surface 7'of the mold 6 ', a molded product having a more uniform thickness than the conventional one, particularly a molded product with a rim having a uniform thickness. We have obtained the knowledge that 11 is obtained.
【0008】この発明は、かかる知見に基づいて成され
たものであって、少なくとも1枚が超塑性金属からなる
複数枚の補助成形シートを積み重ねてそれらの周囲を固
着し気密にしてなる成形補助体を、成形補助体の超塑性
金属からなる補助成形シートを金属材料シートに対面す
るようにかつ成形補助体の端部および金属材料シートの
端部が拘束されないように型内の空間に設置し、成形補
助体の補助成形シートと補助成形シートの隙間に流体を
導入することによって成形補助体を膨らませ、膨らんだ
成形補助体の超塑性金属からなる補助成形シートにより
金属材料シートを型内面に押しつけ、金属材料シートを
所定の形状に成形する金属成形品の製造方法に特徴を有
するものである。The present invention is made on the basis of the above findings, and is a molding auxiliary formed by stacking a plurality of auxiliary molding sheets, at least one of which is made of superplastic metal, and fixing their peripheries to make them airtight. The body is placed in the space in the mold so that the auxiliary forming sheet made of the superplastic metal of the forming auxiliary body faces the metal material sheet and the end of the auxiliary forming body and the end of the metal material sheet are not constrained. By injecting a fluid into the gap between the auxiliary forming sheet of the auxiliary forming body and the auxiliary forming sheet, the auxiliary forming body is inflated, and the metallic material sheet is pressed against the inner surface of the mold by the auxiliary forming sheet made of the superplastic metal of the expanded forming auxiliary body. The method is characterized by a method for producing a metal molded product that molds a metal material sheet into a predetermined shape.
【0009】この発明で用いる成形補助体3は、チタン
合金(Ti−6%Al−4%V)、アルミニウム合金
(Al−33%Cu、Al−22%Zn)、銅合金(C
u−10%Mn)、2相ステンレス鋼などの既知の超塑
性金属板からなる補助成形シートを、図1に示されるよ
うに、二枚重ねて周囲を溶接して密封し、二枚重ねの超
塑性金属板からなる補助成形シート境界に媒体導入口4
を溶接し、媒体導入口4に給気パイプ8を溶接すること
により作製することができる。複数枚の補助成形シート
2の重ね境界にはボロンの弗化物粉末あるいは窒化物粉
末からなる離型剤が塗布されていることが一層好まし
い。The auxiliary forming body 3 used in the present invention is a titanium alloy (Ti-6% Al-4% V), aluminum alloy (Al-33% Cu, Al-22% Zn), copper alloy (C).
u-10% Mn), as shown in FIG. 1, two auxiliary forming sheets made of a known superplastic metal plate such as a duplex stainless steel are superposed and welded to each other to hermetically seal each other to form a superplastic metal plate. Medium introduction port 4 at the boundary of the auxiliary forming sheet consisting of
Can be manufactured by welding and the air supply pipe 8 to the medium introduction port 4. It is more preferable that a mold release agent composed of boron fluoride powder or nitride powder is applied to the overlapping boundary of the plurality of auxiliary forming sheets 2.
【0010】この発明で使用する金属材料シートは、超
塑性金属板だけでなく、非超塑性金属板、複数の孔を設
けた金属板、多孔質金属版、網状金属板または繊維状金
属板などであってもよい。2相ステンレス鋼製金属材料
シートを超塑性成形するには2相ステンレス鋼からなる
補助成形シートで作製された成形補助体を用いることが
好ましく、超塑性チタン合金製金属材料シートを超塑性
成形するには超塑性チタン合金からなる補助成形シート
で作製された成形補助体を用いることが好ましく、超塑
性アルミニウム合金製金属材料シートを超塑性成形する
には超塑性アルミニウム合金からなる補助成形シートで
作製された成形補助体を用いることが好ましく、さらに
超塑性銅合金製金属材料シートを超塑性成形するには超
塑性銅合金からなる補助成形シートで作製された成形補
助体を用いることが好ましい。The metal material sheet used in the present invention is not only a superplastic metal plate, but also a non-superplastic metal plate, a metal plate having a plurality of holes, a porous metal plate, a mesh metal plate or a fibrous metal plate. May be In order to superplastically form a duplex stainless steel metal material sheet, it is preferable to use a forming auxiliary body made of an auxiliary forming sheet made of duplex stainless steel, and to superplastically form a superplastic titanium alloy metal material sheet. It is preferable to use a forming auxiliary body made of an auxiliary forming sheet made of a superplastic titanium alloy, and in order to superplastically form a metal material sheet made of a superplastic aluminum alloy, an auxiliary forming sheet made of a superplastic aluminum alloy is made. It is preferable to use the formed auxiliary body, and it is further preferable to use the formed auxiliary body made of the auxiliary forming sheet made of the superplastic copper alloy for superplastic forming the metal material sheet made of the superplastic copper alloy.
【0011】その他、この発明で用いる成形補助体3
は、図9に示されるように、チタン合金(Ti−6%A
l−4%V)、アルミニウム合金(Al−33%Cu、
Al−22%Zn)、銅合金(Cu−10%Mn)、2
相ステンレス鋼などの既知の超塑性金属板からなる補助
成形シート2と非超塑性金属板からなる補助成形シート
2´を、重ねて周囲を溶接して密封し、さらに補助成形
シート2および補助成形シート2´の二枚重ねの境界に
通じる給気パイプ8を媒体導入口4を介して溶接したも
のであっても良い。この図9に示される成形補助体3を
用いて金属製成形品を製造する状態を図10の断面図に
示す。In addition, the molding auxiliary body 3 used in the present invention
As shown in FIG. 9, a titanium alloy (Ti-6% A
1-4% V), aluminum alloy (Al-33% Cu,
Al-22% Zn), copper alloy (Cu-10% Mn), 2
Auxiliary forming sheet 2 made of a known superplastic metal plate such as duplex stainless steel and auxiliary forming sheet 2'made of a non-superplastic metal plate are overlapped and welded around the periphery to seal the auxiliary forming sheet 2 and the auxiliary forming. The air supply pipe 8 leading to the boundary between the two stacked sheets 2 ′ may be welded via the medium introduction port 4. A state in which a metal molded product is manufactured using the molding auxiliary body 3 shown in FIG. 9 is shown in a sectional view of FIG.
【0012】また、この発明で用いる成形補助体3は、
図11に示されるように、超塑性金属板からなる補助成
形シート2に、超塑性金属板からなる厚い補助成形シー
ト2aおよび超塑性金属板からなる薄い補助成形シート
2bを別の箇所に重ねて周囲を溶接密封し、それぞれに
媒体導入口4を溶接し、媒体導入口4に複数の給気パイ
プ8を溶接したものであっても良い。この図11に示さ
れる成形補助体3を用いると、図12に示されるよう
に、形状の異なった複数の成形品11を同時に作ること
ができる。Further, the molding auxiliary body 3 used in the present invention is
As shown in FIG. 11, a thick auxiliary forming sheet 2a made of a superplastic metal plate and a thin auxiliary forming sheet 2b made of a superplastic metal plate are superposed on different positions on the auxiliary forming sheet 2 made of a superplastic metal plate. The surroundings may be sealed by welding, the medium introducing port 4 may be welded to each, and a plurality of air supply pipes 8 may be welded to the medium introducing port 4. By using the molding auxiliary body 3 shown in FIG. 11, a plurality of molded products 11 having different shapes can be simultaneously produced as shown in FIG.
【0013】さらに、この発明で用いる成形補助体3
は、図13に示されるように、境界シート22の両面
に、補助成形シート2および補助成形シート2とは成分
組成の異なった補助成形シート21を重ねて周囲を溶接
して密封し、境界シート22の両面に補助成形シート2
および補助成形シート2とは成分組成の異なった補助成
形シート21を溶接し、それぞれ媒体導入口4および給
気パイプ8を溶接したものであっても良い。この図13
に示される成形補助体3を用いると、成分組成の異なっ
た成形品を同時に作ることができる。Further, the auxiliary molding body 3 used in the present invention
13, the auxiliary forming sheet 2 and the auxiliary forming sheet 21 having a different component composition from those of the auxiliary forming sheet 2 are overlapped on both sides of the boundary sheet 22, and the periphery is welded and hermetically sealed. Auxiliary forming sheet 2 on both sides of 22
Alternatively, the auxiliary forming sheet 21 having a different composition from the auxiliary forming sheet 2 may be welded, and the medium introducing port 4 and the air supply pipe 8 may be welded to each other. This FIG.
By using the molding auxiliary body 3 shown in (1), molded articles having different component compositions can be simultaneously produced.
【0014】[0014]
【作用】つぎにこの発明の作用をさらに図面に基づいて
一層具体的に説明する。図1に示されるそれぞれガス抜
き穴9を有する型6および型6´並びに成形補助体3お
よび金属材料シート1を用意し、これら成形補助体3お
よび金属材料シート1を図1に示されるように型6およ
び型6´で構成される空間7内に端部が解放された状態
でセットし、型6が浮き上がらない程度のプレス荷重L
をかけながら全体を超塑性加工可能な温度に加熱し、つ
いで給気パイプ8に圧力流体を供給し、静水圧を付加し
ながらガス抜き孔4から空間7内の空気を抜くと、成形
補助体3は図2に示されるように膨らみ、金属材料シー
ト1は成形補助体3に接触しながら型6の空間7の内面
7´に押し付けられ、最終的に図3に示されるように膨
脹した成形補助体3は型6および型6で形成される空間
7に充満し、金属材料シート1は成形されて成形品11
となる。Next, the operation of the present invention will be described more specifically with reference to the drawings. A mold 6 and a mold 6 ′ each having a gas vent hole 9 shown in FIG. 1, a molding auxiliary body 3 and a metal material sheet 1 are prepared, and these molding auxiliary body 3 and metal material sheet 1 are arranged as shown in FIG. The press load L is set in a space 7 formed by the mold 6 and the mold 6'with the end portion opened and the mold 6 does not float up.
While heating the whole to a temperature at which it can be superplastically worked, then supplying a pressure fluid to the air supply pipe 8 and removing the air in the space 7 from the gas vent hole 4 while applying hydrostatic pressure, 3, the metal material sheet 1 swells as shown in FIG. 2, and the metal material sheet 1 is pressed against the inner surface 7 ′ of the space 7 of the mold 6 while contacting the molding auxiliary body 3 and finally expanded as shown in FIG. The auxiliary body 3 fills the mold 6 and the space 7 formed by the mold 6, and the metal material sheet 1 is molded into a molded product 11.
Becomes
【0015】この発明の方法は、超塑性成形中に成形補
助体3および金属材料シート1が共に型6と型6´で構
成される空間7内で拘束されることがなく金属材料シー
ト1が成形されるので、成型品の厚さが従来の特公平2
−36330号公報記載の超塑性成形法により得られた
成型品の厚さに比べて均一となり、特に図18に示され
るような縁10の付いた成形品11をこの発明の製造方
法で作製すると、縁10の厚さと底面周囲部12の厚さ
の減少が少なく、均一な厚さの成型品が得られる。ま
た、この発明の方法では、超塑性成形中に成形補助体3
および金属材料シート1を共に拘束する必要がないの
で、型6または型6´に突起を設ける必要もない。According to the method of the present invention, the metal auxiliary sheet 3 and the metal material sheet 1 are not constrained in the space 7 formed by the mold 6 and the mold 6'during superplastic forming and the metal material sheet 1 is Since it is molded, the thickness of the molded product is 2
When compared with the thickness of the molded product obtained by the superplastic forming method described in JP-A-33630, the molded product 11 with the edge 10 as shown in FIG. 18 is produced by the manufacturing method of the present invention. The thickness of the edge 10 and the thickness of the peripheral portion 12 of the bottom surface are not significantly reduced, and a molded product having a uniform thickness can be obtained. In addition, according to the method of the present invention, the forming assisting body 3 is formed during superplastic forming.
Also, since it is not necessary to restrain the metal material sheet 1 together, it is not necessary to provide the mold 6 or the mold 6'with projections.
【0016】この発明の方法より作製した成型品の厚さ
が従来の特公平2−36330号公報記載の超塑性成形
法により得られた成型品に比べて厚さが均一となる理由
として、この発明の方法では、図2に示されるように、
成形補助体3が全く固定されていないので、超塑性成形
中に成形補助体3の補助成形シート2が型6´の段部1
4のコーナーRにおいて金属材料シート1を押圧する力
が極めて少なく、したがって成形中の金属材料シート1
にかかる摩擦力は、補助成形シート2が完全に固定され
ている図15に示される特公平2−36330号公報記
載の超塑性成形法で成形中に金属材料シート1にかかる
摩擦力に比べて、極めて小さいことによるものと考えら
れる。The reason why the thickness of the molded product produced by the method of the present invention is more uniform than that of the molded product obtained by the superplastic forming method described in Japanese Patent Publication No. 2-36330 of the prior art is as follows. In the method of the invention, as shown in FIG.
Since the auxiliary forming body 3 is not fixed at all, the auxiliary forming sheet 2 of the auxiliary forming body 3 is not fixed to the step portion 1 of the mold 6'during superplastic forming.
The force pressing the metal material sheet 1 at the corner R of 4 is extremely small, and therefore the metal material sheet 1 being formed is
The frictional force applied to the metal material sheet 1 is larger than the frictional force applied to the metal material sheet 1 during forming by the superplastic forming method described in Japanese Patent Publication No. 2-36330 shown in FIG. 15 in which the auxiliary forming sheet 2 is completely fixed. It is thought that this is due to the fact that it is extremely small.
【0017】この発明の金属成形品の製造する方法によ
ると、図6に示されるように、型6の内面7´に補助型
5をセットし、成形補助体3および金属材料シート1を
補助型5の上に置き、超塑性金属が超塑性を示す温度に
加熱した後、図7に示されるように、前記成形補助体3
内に流体を供給して膨らませ、膨らんだ成形補助体3を
金属材料シート1に接触させながら金属材料シート1を
補助型5の表面に押し付けることにより金属材料シート
1を成形することもできる。この時、型6にかけるプレ
ス荷重は成形に必要なガス反力に対抗するプレス荷重L
で十分であるので、型6および型6´は従来よりも薄く
設計することができ、コストを削減することができる。According to the method for producing a metal molded product of the present invention, as shown in FIG. 6, the auxiliary mold 5 is set on the inner surface 7'of the mold 6, and the auxiliary molding body 3 and the metal material sheet 1 are used as the auxiliary mold. 5, and after heating the superplastic metal to a temperature at which the superplastic metal exhibits superplasticity, as shown in FIG.
It is also possible to form the metal material sheet 1 by supplying a fluid therein to inflate the metal material sheet 1 and pressing the metal material sheet 1 against the surface of the auxiliary mold 5 while bringing the expanded auxiliary molding body 3 into contact with the metal material sheet 1. At this time, the press load applied to the mold 6 is a press load L that opposes the gas reaction force required for molding.
Is sufficient, the mold 6 and the mold 6 ′ can be designed thinner than before, and the cost can be reduced.
【0018】さらに、この発明の金属成形品の製造する
方法によると、図8に示されるように、型6の内面およ
び型6´の内面7´にそれぞれ補助型5をセットし、成
形補助体3の両面に金属材料シート1を置き、超塑性金
属が超塑性を示す温度に加熱した後、図8に示されるよ
うに、前記成形補助体3内に流体を供給して膨らませ、
膨らんだ成形補助体3を金属材料シート1に接触させな
がら金属材料シート1をそれぞれ補助型5の表面に押し
付けることにより、同時に2枚の金属材料シート1を成
形することもできる。Further, according to the method for manufacturing a metal molded product of the present invention, as shown in FIG. 8, the auxiliary mold 5 is set on the inner surface of the mold 6 and the inner surface 7'of the mold 6 ', respectively, and the auxiliary molding body is formed. 3, the metal material sheets 1 are placed on both sides of the metal 3, and the superplastic metal is heated to a temperature at which it exhibits superplasticity, and then, as shown in FIG.
It is also possible to simultaneously form two sheets of metal material 1 by pressing the metal material sheets 1 against the surface of the auxiliary mold 5 while contacting the expanded molding auxiliary body 3 with the metal material sheet 1.
【0019】[0019]
実施例、 Fe−25%Cr−6%Niの組成を有し厚さ:1.8
mmの超塑性二相ステンレス鋼板2を2枚用意し、この
超塑性二相ステンレス鋼板を図1に示されるように周囲
を溶接13し、さらに給気パイプ8を取り付けて成形補
助体3を作製した。Example, having a composition of Fe-25% Cr-6% Ni, thickness: 1.8
2 mm superplastic duplex stainless steel plates 2 are prepared, the periphery of the superplastic duplex stainless steel plates 2 is welded 13 as shown in FIG. 1, and the air supply pipe 8 is further attached to form the forming auxiliary body 3. did.
【0020】一方、金属材料シート1としてFe−25
%Cr−6%Niの組成を有し厚さ:2mmの超塑性二
相ステンレス鋼板を用意し、この金属材料シート1を型
6´の空間7内の段部14の上に載せ、この金属材料シ
ート1の上にさらに前記成形補助体3を図1に示される
ように乗せ、型6´の上に型6を被せて型6および型6
´で形成された空間7内に金属材料シート1および成形
補助体3を装入し、型6の上から型6が浮き上がらない
程度のプレス荷重Lをかけながら全体を910℃に加熱
し、ついで給気パイプ8に圧力流体を圧力:1.8MP
aとなるように供給し、静水圧を付加しながらガス抜き
穴9から空間7内の空気を抜くことにより補助成形体3
の補助成形シート2を超塑性成形歪み速度:5×10-4
/sで成形したところ、一部断面図の図18に示される
形状の縁10を有する成形品11が得られた。On the other hand, Fe-25 was used as the metal material sheet 1.
A superplastic duplex stainless steel sheet having a composition of% Cr-6% Ni and a thickness of 2 mm is prepared, and this metal material sheet 1 is placed on the stepped portion 14 in the space 7 of the mold 6 ', and the metal The molding auxiliary body 3 is further placed on the material sheet 1 as shown in FIG. 1, and the mold 6 is placed on the mold 6 ′ to form the mold 6 and the mold 6.
The metal material sheet 1 and the forming auxiliary body 3 are loaded into the space 7 formed by ‘′, and the whole is heated to 910 ° C. while applying a pressing load L to the extent that the mold 6 does not float above the mold 6, and then Pressurize the pressurized fluid to the air supply pipe 8: 1.8MP
a so as to be a, and the air in the space 7 is evacuated from the gas vent hole 9 while applying hydrostatic pressure.
Auxiliary forming sheet 2 of superplastic forming strain rate: 5 × 10 -4
When molded with / s, a molded product 11 having an edge 10 having a shape shown in FIG. 18 of a partial cross-sectional view was obtained.
【0021】従来例1、 図14示されるように、型6´の段部14に、実施例で
用意した金属材料シートの二相ステンレス鋼板を乗せ、
さらに、この段部14を有する型6´と突起12を有す
る型6の間に補助成形シート2を拘束して載置し、金属
材料シートの二相ステンレス鋼板を端部解放状態に保持
し、成形に必要なガス反力に対抗する力Lおよび端部拘
束力L1 を合計した強力なプレス荷重L+L1 (=1.
1L以上)をかけて全体を910℃に加熱し、ついで圧
力流体を圧力:1.8MPaとなるように供給して静水
圧を付加し、静水圧を付加しながらガス抜き穴9から空
間7内の空気を抜くことにより補助成形シート2を超塑
性成形歪み速度:5×10 -4/sで変形させながら金属
材料シート1を型6´の内面7´に押し付け、一部断面
図の図18に示される縁10を有する成形品11を作製
した。Conventional Example 1, as shown in FIG. 14, in the step portion 14 of the mold 6 ', in the embodiment,
Put the duplex stainless steel plate of the prepared metal material sheet,
Further, it has a mold 6 ′ having this step portion 14 and a protrusion 12.
The auxiliary forming sheet 2 is constrained and placed between the molds 6,
Holds the duplex stainless steel sheet of the material sheet in the open end state
However, the force L against the gas reaction force required for molding and the end restraint
Bundle power L1Strong press load L + L1(= 1.
(1 L or more), heat the whole to 910 ° C, and then press
Hydrostatic fluid is supplied so that the pressure is 1.8 MPa and still water is supplied.
Pressure is applied, and hydrostatic pressure is applied while emptying from the gas vent hole 9.
The auxiliary forming sheet 2 is superplasticized by removing the air in the space 7.
Molding strain rate: 5 × 10 -Four/ S while deforming
The material sheet 1 is pressed against the inner surface 7'of the mold 6 ', and a partial cross section is obtained.
Fabricate a molded article 11 having edges 10 shown in FIG.
did.
【0022】従来例2、 図17示されるように、突起12を有する型6と型6´
の間に、実施例で用意した金属材料シートの二相ステン
レス鋼板を挟み、金属材料シート1を拘束して載置し、
成形に必要なガス反力に対抗する力Lおよび端部拘束力
L1 を合計した強力なプレス荷重L+L1 (=1.1L
以上)をかけて全体を910℃に加熱し、ついで圧力流
体を圧力:1.8MPaとなるように供給して静水圧を
付加し、静水圧を付加しながらガス抜き穴9から空間7
内の空気を抜くことにより補助成形シート2を超塑性成
形歪み速度:5×10-4/sで変形させながら金属材料
シート1を型6´の内面7´に押し付け、一部断面図の
図18に示される縁10を有する成形品11を作製し
た。Conventional Example 2, as shown in FIG. 17, a mold 6 having a projection 12 and a mold 6 '.
Between the two, sandwiching the duplex stainless steel sheet of the metal material sheet prepared in the example, the metal material sheet 1 is constrained and placed,
Strong press load L + L 1 (= 1.1L), which is the sum of the force L against the gas reaction force required for molding and the end restraining force L 1.
The above is applied to heat the whole to 910 ° C., and then the pressure fluid is supplied so as to have a pressure of 1.8 MPa to apply a hydrostatic pressure.
The metal material sheet 1 is pressed against the inner surface 7 ′ of the mold 6 ′ while deforming the auxiliary forming sheet 2 at a superplastic forming strain rate of 5 × 10 −4 / s by removing the air inside, and a partial cross-sectional view is shown. A molded article 11 having an edge 10 shown at 18 was produced.
【0023】これら実施例、従来例1および従来例2で
作製した縁10を有するの成形品11の中央を切断し、
図4の断面図のA〜I点での厚さを測定し、その結果を
図5のグラフに示し比較した。図5のグラフにおいて、
縦軸は成形品の断面のA〜I点での厚さ、横軸は成形品
の断面のA点から成形品の表面に沿ったB〜I点の距離
を示す。図5からも明らかなように、金属材料シートと
して同じ厚さ(2mm)の超塑性二相ステンレス鋼板を
使用して実施例で得られた成形品の厚さは、従来例1お
よび従来例2で得られた成形品の厚さを比較すると、実
施例で得られた成形品は肉厚の減少が少なく、実施例で
得られた成形品の方が厚さのばらつきが少なく均一であ
ることが分かる。The center of the molded article 11 having the edge 10 produced in these Examples, Conventional Example 1 and Conventional Example 2 is cut,
The thickness at points A to I in the sectional view of FIG. 4 was measured, and the results are shown in the graph of FIG. 5 for comparison. In the graph of FIG.
The vertical axis represents the thickness of the cross section of the molded product at points A to I, and the horizontal axis represents the distance from point A of the cross section of the molded product to points B to I along the surface of the molded product. As is clear from FIG. 5, the thickness of the molded product obtained in the example using the superplasticity duplex stainless steel plate of the same thickness (2 mm) as the metal material sheet is the same as that of the conventional example 1 and the conventional example 2. Comparing the thicknesses of the molded products obtained in step 1, the molded products obtained in the examples show less reduction in wall thickness, and the molded products obtained in the examples have less variation in thickness and are uniform. I understand.
【0024】[0024]
【発明の効果】上述のように、この発明によると、
(1)従来よりも超塑性成形して得られた成形品に比べ
て、肉厚の減少が極めて少なく均一な厚さの成形品を提
供することができる、(2)型にかけるプレス荷重は、
ガス反力に対抗する力Lをかけるだけで十分であり、従
来のように成形に必要なガス反力に対抗する力Lおよび
端部拘束力L1を合計したプレス荷重L+L1 をかける
必要がないところから、従来よりも型を薄く設計するこ
とができ、型のコストも削減できる、(3)金属材料シ
ート1と型6の隙間から流体が漏洩しないように、型6
の周囲にガスシール用の突起12を設ける必要がないの
で精密切削の必要がなく、型の製造コストも削減するこ
とができる、など産業上、非常に有益な効果をもたらす
ものである。As described above, according to the present invention,
(1) Compared with a molded product obtained by superplastic molding as compared with the conventional one, it is possible to provide a molded product with an extremely small thickness reduction and a uniform thickness. (2) The press load applied to the mold is ,
It is sufficient to apply the force L against the gas reaction force, and it is necessary to apply the press load L + L 1 which is the total of the force L against the gas reaction force required for molding and the end restraining force L 1 as in the conventional case. Since it does not exist, the mold can be designed thinner than before and the cost of the mold can be reduced. (3) The mold 6 is designed so that the fluid does not leak from the gap between the metal material sheet 1 and the mold 6.
Since it is not necessary to provide the protrusion 12 for gas sealing around the periphery of the mold, there is no need for precision cutting, and the manufacturing cost of the mold can be reduced.
【図1】成形補助体および金属材料シートを2つの型で
構成される空間ににセットした状態を示すこの発明の断
面説明図である。FIG. 1 is a cross-sectional explanatory view of the present invention showing a state where a molding auxiliary body and a metal material sheet are set in a space formed by two molds.
【図2】成形補助体および金属材料シートを2つの型で
構成される空間ににセットし、さらに圧力流体を供給し
始めた状態を示すこの発明のの断面図説明である。FIG. 2 is a cross-sectional view of the present invention showing a state in which a molding auxiliary body and a metal material sheet are set in a space formed by two molds and a pressure fluid is started to be supplied.
【図3】成形補助体および金属材料シートを2つの型で
構成される空間ににセットし、さらに圧力流体を供給
し、超塑性成形を終了した状態を示すこの発明のの断面
図説明である。FIG. 3 is a sectional view of the present invention showing a state in which a forming auxiliary body and a metal material sheet are set in a space formed by two molds, a pressure fluid is further supplied, and superplastic forming is completed. .
【図4】この発明の金属製品の製造方法により成形し取
り出した成形品の厚さ測定点を示す断面図である。FIG. 4 is a cross-sectional view showing thickness measurement points of a molded product that is molded and taken out by the method for manufacturing a metal product of the present invention.
【図5】図4の成形品の断面A〜I点における厚さの分
布を示すグラフである。5 is a graph showing the distribution of thickness at points A to I of the molded product of FIG.
【図6】成形補助体および金属材料シートを2つの型で
構成される空間ににセットしたこの発明の他の金属製品
の製造方法を示す説明図である。FIG. 6 is an explanatory view showing a method for manufacturing another metal product of the present invention in which a forming auxiliary body and a metal material sheet are set in a space formed by two molds.
【図7】図6のこの発明の超塑性成形法により金属材料
シートを成形した状態を示す断面図である。FIG. 7 is a cross-sectional view showing a state in which a metal material sheet is formed by the superplastic forming method of the present invention in FIG.
【図8】この発明の他の超塑性成形法を示す断面図であ
る。FIG. 8 is a cross-sectional view showing another superplastic forming method of the present invention.
【図9】超塑性金属および非超塑性金属からなる補助成
形シートで構成された成形補助体の断面図である。FIG. 9 is a cross-sectional view of a forming auxiliary body formed of an auxiliary forming sheet made of a superplastic metal and a non-superplastic metal.
【図10】図9の成形補助体を用いたこの発明の超塑性
成形法を示す断面図である。10 is a cross-sectional view showing a superplastic forming method of the present invention using the forming auxiliary body of FIG.
【図11】異なった厚さの補助成形シートで構成された
成形補助体の断面図である。FIG. 11 is a cross-sectional view of a forming auxiliary body composed of auxiliary forming sheets having different thicknesses.
【図12】図11の成形補助体を用いたこの発明の超塑
性成形法を示す断面図である。12 is a cross-sectional view showing a superplastic forming method of the present invention using the forming auxiliary body of FIG.
【図13】異なった成分組成の超塑性金属からなる補助
成形シートで構成された成形補助体の断面図である。FIG. 13 is a cross-sectional view of a forming auxiliary body composed of auxiliary forming sheets made of superplastic metals having different component compositions.
【図14】従来の補助成形シートを用いた金属材料シー
トの超塑性成形状態を示す断面説明図である。FIG. 14 is a cross-sectional explanatory view showing a superplastic forming state of a metal material sheet using a conventional auxiliary forming sheet.
【図15】従来の補助成形シートを用いて金属材料シー
トを超塑性成形する時の圧力流体を供給し始めた状態を
示す断面説明図である。FIG. 15 is a cross-sectional explanatory view showing a state in which pressure fluid is started to be supplied when superplastically forming a metal material sheet using a conventional auxiliary forming sheet.
【図16】従来の補助成形シートを用いて金属材料シー
トを超塑性成形を終了した状態を示すこの発明のの断面
図説明である。FIG. 16 is a sectional view of the present invention showing a state in which superplastic forming of a metal material sheet has been completed using a conventional auxiliary forming sheet.
【図17】従来の補助成形シートを用いない金属材料シ
ートの超塑性成形を示す断面説明図である。FIG. 17 is a cross-sectional explanatory view showing superplastic forming of a metal material sheet without using a conventional auxiliary forming sheet.
【図18】超塑性成形品の一部断面を示す断面斜視図で
ある。FIG. 18 is a cross-sectional perspective view showing a partial cross section of a superplastic molded product.
1 金属材料シート 2 補助成形シート 2´ 超塑性金属でない補助成形シート 2a 厚い補助成形シート 2b 薄い補助成形シート 3 成形補助体 4 媒体導入口 5 補助型 6 型 6´ 型 7 空間 7´ 内面 8 給気パイプ 9 ガス抜き穴 10 縁 11 成形品 12 底面周囲部 13 溶接 14 段部 15 供給通路 1 Metallic Material Sheet 2 Auxiliary Forming Sheet 2'Auxiliary Forming Sheet Not Superplastic Metal 2a Thick Auxiliary Forming Sheet 2b Thin Auxiliary Forming Sheet 3 Forming Auxiliary Body 4 Medium Inlet 5 Auxiliary 6 6 6'7 Space 7'Inner Surface 8 Supply Air pipe 9 Gas vent hole 10 Edge 11 Molded product 12 Bottom surface peripheral portion 13 Welding 14 Step portion 15 Supply passage
Claims (5)
数枚の補助成形シートを積み重ねてそれらの周囲を固着
し気密にしてなる成形補助体を、成形補助体の超塑性金
属からなる補助成形シートを金属材料シートに対面する
ようにかつ成形補助体の端部および金属材料シートの端
部が拘束されないように型内の空間に設置し、成形補助
体の補助成形シートと補助成形シートの隙間に流体を導
入することによって成形補助体を膨らませ、膨らんだ成
形補助体の超塑性金属からなる補助成形シートにより金
属材料シートを型内面に押しつけ、金属材料シートを所
定の形状に成形することを特徴とする金属成形品の製造
方法。1. An auxiliary forming sheet made of a superplastic metal of a forming auxiliary body, which is formed by stacking a plurality of auxiliary forming sheets, at least one of which is made of a superplastic metal, and fixing the periphery thereof to make them airtight. Is installed in the space in the mold so that the end of the auxiliary molding body and the end of the metallic material sheet are not constrained so as to face the metal material sheet, and in the gap between the auxiliary molding sheet of the auxiliary molding body and the auxiliary molding sheet. A feature is that the auxiliary molding is expanded by introducing a fluid, and the auxiliary molding sheet made of the superplastic metal of the expanded auxiliary is pressed against the metal material sheet against the inner surface of the mold to form the metal material into a predetermined shape. A method for manufacturing a metal molded product.
あることを特徴とする請求項1記載の金属成形品の製造
方法。2. The method for producing a metal molded product according to claim 1, wherein the superplastic metal is duplex stainless steel.
あることを特徴とする請求項1記載の金属成形品の製造
方法。3. The method for producing a metal molded product according to claim 1, wherein the superplastic metal is a superplastic titanium alloy.
合金であることを特徴とする請求項1記載の金属成形品
の製造方法。4. The method for producing a metal molded product according to claim 1, wherein the superplastic metal is a superplastic aluminum alloy.
非超塑性金属板、複数の孔を設けた金属板、多孔質金属
板、網状金属板または繊維状金属板であることを特徴と
する請求項1記載の金属成形品の製造方法。5. The metal material sheet is a superplastic metal plate,
The method for producing a metal molded product according to claim 1, which is a non-superplastic metal plate, a metal plate having a plurality of holes, a porous metal plate, a mesh metal plate or a fibrous metal plate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31910595A JP3440662B2 (en) | 1995-12-07 | 1995-12-07 | Manufacturing method of metal molded products |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31910595A JP3440662B2 (en) | 1995-12-07 | 1995-12-07 | Manufacturing method of metal molded products |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09155463A true JPH09155463A (en) | 1997-06-17 |
JP3440662B2 JP3440662B2 (en) | 2003-08-25 |
Family
ID=18106524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31910595A Expired - Fee Related JP3440662B2 (en) | 1995-12-07 | 1995-12-07 | Manufacturing method of metal molded products |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3440662B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101289264B1 (en) * | 2012-02-01 | 2013-07-24 | 대화항공산업(주) | Fluid cell forming apparatus |
CN105415745A (en) * | 2014-09-03 | 2016-03-23 | 天津市天锻压力机有限公司 | Pressure control system for large superplastic forming and diffusion bonding hydraulic machine |
-
1995
- 1995-12-07 JP JP31910595A patent/JP3440662B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101289264B1 (en) * | 2012-02-01 | 2013-07-24 | 대화항공산업(주) | Fluid cell forming apparatus |
CN105415745A (en) * | 2014-09-03 | 2016-03-23 | 天津市天锻压力机有限公司 | Pressure control system for large superplastic forming and diffusion bonding hydraulic machine |
CN105415745B (en) * | 2014-09-03 | 2017-05-24 | 天津市天锻压力机有限公司 | Pressure control system for large superplastic forming and diffusion bonding hydraulic machine |
Also Published As
Publication number | Publication date |
---|---|
JP3440662B2 (en) | 2003-08-25 |
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