JPH04100641A - Superplastic forming method for both-side dimple core - Google Patents
Superplastic forming method for both-side dimple coreInfo
- Publication number
- JPH04100641A JPH04100641A JP2215470A JP21547090A JPH04100641A JP H04100641 A JPH04100641 A JP H04100641A JP 2215470 A JP2215470 A JP 2215470A JP 21547090 A JP21547090 A JP 21547090A JP H04100641 A JPH04100641 A JP H04100641A
- Authority
- JP
- Japan
- Prior art keywords
- forming
- molding
- stage
- core
- double
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 60
- 239000000919 ceramic Substances 0.000 claims abstract description 18
- 239000000945 filler Substances 0.000 claims description 16
- 238000000465 moulding Methods 0.000 abstract description 75
- 230000007547 defect Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012856 packing Methods 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は板状部材の両面側に複数個の円すい状突起を有
し、例えば軽量サンドイッチ構造体に使用される両面デ
ィンプルコアの成形方法に係り、特に割れ等の成形不良
を発生することなく短時間で成形を行ない得るようにし
た両面ディンプルコアの超塑性成形方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention has a plurality of conical protrusions on both sides of a plate-like member, and is applicable to a method for forming a double-sided dimpled core used in a lightweight sandwich structure, for example. In particular, the present invention relates to a superplastic forming method for a double-sided dimpled core that can be formed in a short time without causing forming defects such as cracks.
［従来の技術］
一般に、第３図および第４図に示すような軽量サンドイ
ッチ構造体には、板状部材の両面側に複数個の円すい状
突起を有する両面ディンプルコアが使用されている。[Prior Art] Generally, a double-sided dimple core having a plurality of conical protrusions on both sides of a plate member is used in a lightweight sandwich structure as shown in FIGS. 3 and 4.
従来、この種の両面ディンプルコアを成形するに際して
は、例えば第５図（ａ）〜（Ｃ）にその成形過程図を示
すように、まず平板素板を成形型上にセットして、全体
を超塑性成形温度（Ｔｉ６Ａｉ）−４Ｖ合金の場合は約
９００℃）に加熱し、次いで成形用の不活性ガス（アル
ゴン等）を平板素板の上面に負荷し、その圧力を適切に
調節して超塑性成形を行なっており、１工程で最終形状
・寸法まで成形するようにしている。Conventionally, when molding this type of double-sided dimpled core, for example, as shown in the molding process diagrams in Figs. The material is heated to a superplastic forming temperature (approximately 900°C in the case of Ti6Ai-4V alloy), and then an inert gas for forming (argon, etc.) is applied to the upper surface of the flat blank, and the pressure is adjusted appropriately. Superplastic molding is used to form the final shape and dimensions in one step.
［発明が解決しようとする課題］
ところで、このような従来の成形方法における技術的な
ポイントは、成形初期におけるデインプル頂部のおす型
成形段階にあり、成形ガス圧が高過ぎる場合には、最小
断面積部である円すい頂部で過大応力が生じて（応力集
中）、この部分に割れが発生してしまう。この場合、第
６図（ａ）に示すように、円すい頂部の一円周断面積で
負担し得る限界荷重Ｐ ｅｅｌは、被加工部材の成形条
件下での最大破断応力をσ、とすれば、ｐ 、、１−（
πｄ＋ｊｏ） ・σ、である。この限界荷重Ｐ ｃｒ
ｌは、被加工部材が持ちこたえ得る最大成形力を与える
ものであり、実際にはこの値以上にならないように、周
面の受圧面積を考慮して成形圧力Ｐ１を選定することに
なる。[Problems to be Solved by the Invention] By the way, the technical point in such a conventional molding method lies in the male molding stage of the top of the dimple at the initial stage of molding, and if the molding gas pressure is too high, the minimum Excessive stress occurs (stress concentration) at the top of the cone, which is the surface area, and cracks occur in this area. In this case, as shown in Fig. 6(a), the limit load P eel that can be borne by one circumferential cross-sectional area of the top of the cone is calculated by assuming that the maximum breaking stress of the workpiece under the forming conditions is σ. ,p,,1-(
πd+jo) ・σ. This limit load P cr
l gives the maximum forming force that the workpiece can withstand, and in practice, the forming pressure P1 is selected in consideration of the pressure-receiving area of the circumferential surface so that it does not exceed this value.
一方、第６図（ｂ）は、同一円すい寸法を逆方向から、
いわゆるめす型成形を行なう場合を示す図であり、この
場合の限界荷重は、同様にＰｏ、２−（πｄ２ｔｏ）・
σ、と求められ、これを満足するようにガス圧Ｐ２
（≦４ｔｏ 拳σｂ ／ ｄ ２ ）が設定される。そ
して、一般にｄ２ ＞ｄ、であるから、Ｐ、、２ ＞Ｐ
、、＋ （Ｐｅ、＋ −（ｄ＋ ／ｄ２）・Ｐ−１
２）となり、めす型成形の方が高い成形圧力Ｐ２を設定
できるので、成形時間は短かくて済む。On the other hand, Fig. 6(b) shows the same cone dimension from the opposite direction.
This is a diagram showing a case where so-called female molding is performed, and the limit load in this case is similarly Po, 2-(πd2to)・
σ, and the gas pressure P2 is set to satisfy this.
(≦4to fist σb/d 2 ) is set. And since d2 > d, in general, P,, 2 > P
,, + (Pe, + -(d+ /d2)・P-1
2), and since a higher molding pressure P2 can be set in female mold molding, the molding time can be shortened.
以上のように、おす型設計からめす型成形を連続的に１
工程で成形する従来の成形方法では、成形初期のおす型
成形段階で成形圧力を高くとれないことから、変形速度
を低くせざるを得ず、従って長時間かけることによって
所要の変形量を達成する方法となっていた。実際の成形
例では、おす型成形段階の成形時間は、めす型成形時間
の約２倍を要しており、生産性向上の阻害要因となって
いた。As mentioned above, from the male mold design to the female mold molding,
In the conventional molding method, which involves molding in the process, it is not possible to increase the molding pressure at the male mold forming stage in the initial stage of molding, so the deformation speed has to be low, and therefore the required amount of deformation is achieved by taking a long time. It was a method. In actual molding examples, the molding time in the male mold molding stage was approximately twice as long as the female mold molding time, which was an impediment to improving productivity.
本発明の目的は、割れ等の成形不良を発生することなく
短時間で成形を行ない生産性を向上させることが可能な
両面ディンプルコアの超塑性成形方法を提供することに
ある。An object of the present invention is to provide a method for superplastically forming a double-sided dimpled core, which can perform forming in a short time without causing forming defects such as cracks, and improve productivity.
［課題を解決するための手段］
上記の目的を達成するために本発明では、板状部材の両
面側に複数個の円すい状突起を有する両面ディンプルコ
アの成形方法において、成形方法として、めす型成形方
式を基本とする２工程成形法を採用し、１工程目の成形
を行なった後に、当該成形による既成形部に充填材（セ
ラミックキャスタブル等）を充填して２工程目の成形を
行ない、しかる後に充填材を除去するようにしている。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a method for forming a double-sided dimple core having a plurality of conical protrusions on both sides of a plate-like member. A two-step molding method based on the molding method is adopted, and after the first step molding is performed, the already formed part by the molding is filled with a filler (ceramic castable, etc.) and the second step is performed, After that, the filler is removed.
［作 用］
従って、本発明による両面ディンプルコアの超塑性成形
方法においては、成形方法としてめす型成形法を採用し
、さらに２工程目の成形に当って充填材を使用している
ことにより、めす型成形方式の採用は、既述したように
おす型成形方式にくらべて、成形初期の円すい底部の荷
重負担断面積増加の作用をなし、結果として、高い成形
ガス圧の設定が可能となり、成形時間の短縮化に寄与す
ることができる。[Function] Therefore, in the superplastic molding method for a double-sided dimpled core according to the present invention, by adopting the female mold molding method as the molding method and further using a filler in the second molding step, The adoption of the female mold molding method increases the load-bearing cross-sectional area of the conical bottom at the initial stage of molding compared to the male mold molding method as described above, and as a result, it becomes possible to set a high molding gas pressure. This can contribute to shortening molding time.
この場合、工程数は２工程には増えるものの、トータル
成形時間としては従来法の約２／３に減少することとな
る。また、２工程目の成形に当っての既成形部への充填
材（セラミックキャスタブル）による充填は、２工程目
の成形ガス圧による既成形部の変形を防止する作用をな
すもので、特に成形個所が多い場合や成形形状が複雑な
場合には、剛体充填材にくらべて適用性が高いという利
点を得ることができる。In this case, although the number of steps increases to two, the total molding time is reduced to about 2/3 of the conventional method. In addition, filling the pre-formed part with a filler (ceramic castable) during the second molding process has the effect of preventing deformation of the pre-formed part due to the molding gas pressure in the second process. When there are many parts or when the molded shape is complicated, it has the advantage of being more applicable than rigid fillers.
［実施例コ まず、本発明の考え方について述べる。[Example code] First, the concept of the present invention will be described.
本発明では、成形方法として、めす型成形方式を基本と
した２工程成形法を採用し、さらに１工程目で既に成形
されたデインプルを２工程目の成形ガス圧で変形させな
いように、また複雑形状にも適合し得るように、充填材
として、例えばセラミックキャスタブル（セラミック粒
子をセメント状にして流し込み、その後溶剤を蒸発させ
たもの）を用いて既成形部を充填する点に特徴を有する
ものである。In the present invention, a two-step molding method based on a female mold molding method is adopted as a molding method, and furthermore, the dimples already formed in the first step are not deformed by the molding gas pressure in the second step, and the dimples are complicated. The feature is that the pre-formed part is filled with ceramic castable (ceramic particles poured into a cement-like form and then the solvent is evaporated) as a filler so that it can be adapted to the shape. be.
以下、上記のような考え方に基づく本発明の−実施例に
ついて、図面を参照して詳細に説明する。Hereinafter, embodiments of the present invention based on the above-mentioned concept will be described in detail with reference to the drawings.
第１図は、本発明による両面ディンプルコアの超塑性成
形方法の一例を示す成形過程図である。FIG. 1 is a forming process diagram showing an example of the superplastic forming method for a double-sided dimpled core according to the present invention.
すなわち、本実施例による両面ディンプルコアの超塑性
成形方法は、第１図に示すように、まず平板素板１に１
工程目の成形を行なって、平板素板１の片面側に複数個
の円すい状突起１ａを成形する（同図（ａ）、（ｂ））
。That is, in the superplastic forming method of the double-sided dimple core according to this embodiment, as shown in FIG.
The forming process is performed to form a plurality of conical protrusions 1a on one side of the flat blank 1 (see (a) and (b) in the same figure).
.
次に、１工程目の成形による既成形部に充填材としてセ
ラミックキャスタブル２を充填する（同図（Ｃ））。Next, ceramic castable 2 is filled as a filler into the already formed part formed in the first step ((C) of the same figure).
次に、かかる半成形品に２工程目の成形を行なって、平
板素板１の反対面側に複数個の円すい状突起１ｂを成形
する（同図（ｄ））。Next, the semi-molded product is subjected to a second molding process, and a plurality of conical projections 1b are formed on the opposite side of the flat blank plate 1 (FIG. 4(d)).
しかる後に、上記成形部に充填されているセラミックキ
ャスタブル２を除去して両面ディンプルコア３を成形す
る。Thereafter, the ceramic castable 2 filled in the molding section is removed and a double-sided dimple core 3 is molded.
一方、第２図（ａ）、（ｂ）は、第１図における両面デ
ィンプルコアの成形に適用される成形用型の構成例を示
す断面図である。なお、第２図（ａ）は１工程目成形を
、第２図（ｂ）は２工程目成形をそれぞれ示している。On the other hand, FIGS. 2(a) and 2(b) are cross-sectional views showing an example of the configuration of a molding die applied to molding the double-sided dimpled core in FIG. 1. Note that FIG. 2(a) shows the first step molding, and FIG. 2(b) shows the second step molding.
第一２図において、４は下型コンテナー ５゜５′は成
形型、６，６′は上型（押え板）であり、この上型６，
６′には成形ガス圧導入用ポート６１が設けられている
。また、７は平板素材を示すもので、同図のようにセッ
トされた後に、１工程目で成形されて半成形品７′とな
り、次いて２工程目の成形型にセットされ、成形されて
完成品７′となる。この場合、２工程目の成形において
は、１工程目の成形による既成形部の変形防止のために
、充填材としてセラミックキャスタブル８が充填され、
しかる後に完成品７′からセラミックキャスタブル８を
容易に除去して、両面ディンプルコアが得られる。In Fig. 12, 4 is a lower mold container, 5° 5' is a mold, 6, 6' is an upper mold (pressing plate), and this upper mold 6,
A port 61 for introducing forming gas pressure is provided at 6'. In addition, 7 indicates a flat plate material, which is set as shown in the figure and then molded in the first process to become a semi-molded product 7', and then set in a mold in the second process and molded. The finished product is 7'. In this case, in the second molding step, ceramic castable 8 is filled as a filler in order to prevent deformation of the already formed part due to the first molding step.
Thereafter, the ceramic castable 8 is easily removed from the finished product 7' to obtain a double-sided dimpled core.
本実施例の成形方法により、工程数は２工程に増加する
か、トータルの成形時間は従来の成形方法の約２／３に
減少している。According to the molding method of this embodiment, the number of steps is increased to two, or the total molding time is reduced to about 2/3 of that of the conventional molding method.
従来の方法： Ｔ−ｔ、＋ｔＦ−３・１Ｆ（ｔｙ ＝２
ｔｐ ）
本実施例の方法：Ｔ−ｔＦＸ２−２・ｔｐｔＭ＝おす型
部成形時間
ｔＦ：めす型部成形時間
また、成形条件（圧力、温度等）のばらつきは、従来の
成形方法（おす型成形段階）には大きく影響して割れ等
の成形不良を起こしやすかったが、めす型性である本実
施例の方法では、荷重負担部所面積の増加に伴って影響
度合が減少し、作業の安定性も向上している。Conventional method: T-t, +tF-3・1F (ty = 2
tp) Method of this example: T-tFX2-2・tptM=Male mold part molding time tF:Female mold part molding time Also, variations in molding conditions (pressure, temperature, etc.) However, in the method of this example, which uses a female mold, the degree of influence decreases as the area of the load-bearing part increases, resulting in stable work. Sexuality has also improved.
上述したように、本実施例では、板状部材である平板素
板１の両面側に複数個の円すい状突起ｌａ、ｌｂを有す
る両面ディンプルコアを成形するに際して、成形方法と
して、めす型成形方式を基本とする２工程成形法を採用
し、平板素板１に１工程目の成形を行なって片面側に複
数個の円すい状突起１ａを成形した後に、当該１工程目
の成形による既成形部に充填材してセラミックキャスタ
ブル２を充填し、２工程目の成形を行なって反対面側に
複数個の円すい状突起２ａを成形し、しかる後にセラミ
ックキャスタブル２を除去するようにしたものである。As described above, in this embodiment, when molding a double-sided dimple core having a plurality of conical protrusions la and lb on both sides of the flat blank plate 1, which is a plate-shaped member, a female mold molding method is used as a molding method. A two-step forming method based on is adopted, and after the first step is performed on the flat plate 1 to form a plurality of conical protrusions 1a on one side, the already formed part by the first step is formed. A filler is used to fill the ceramic castable 2, a second molding process is performed to form a plurality of conical protrusions 2a on the opposite side, and then the ceramic castable 2 is removed.
従って、２工程目の成形に当っては、１工程目の成形に
よる既成形部へセラミックキャスタブル２を充填してい
るため、２工程目の成形ガス圧による既成形部の変形を
防止し、割れ等の成形不良が発生するようなことがなく
なる。また、成形方法として、めす型成形方式を採用し
ているため、前述したようなおす型成形方式にくらべて
、成形初期の円すい底部の荷重負担断面積が増加し、結
果として、高い成形ガス圧の設定が可能となり、成形時
間の短縮化に寄与することができる。これにより、両面
ディンプルコアを成形する際の生産性を著しく向上させ
ることが可能となる。Therefore, in the second molding process, the ceramic castable 2 is filled into the pre-formed part formed by the first process, which prevents the pre-formed part from deforming due to the molding gas pressure in the second process and prevents cracking. This eliminates the occurrence of molding defects such as. In addition, since a female molding method is adopted as a molding method, the load-bearing cross-sectional area of the conical bottom at the initial stage of molding increases compared to the male molding method described above, resulting in a high molding gas pressure. Settings can be made, which can contribute to shortening molding time. This makes it possible to significantly improve productivity when molding a double-sided dimpled core.
尚、本発明は複雑な形状の板金部品の成形方法について
も、前述と全く同様に適用することが可能である。Incidentally, the present invention can be applied to a method of forming a sheet metal part having a complicated shape in exactly the same manner as described above.
また、上記実施例では、充填材としてセラミックキャス
タブルを用いた場合について述べたが、これと同等の効
果を奏する他の充填材を用いるようにしてもよい。Further, in the above embodiment, a case was described in which ceramic castable was used as the filler, but other fillers having the same effect may be used.
［発明の効果コ
以上説明したように本発明によれば、板状部材の両面側
に複数個の円すい状突起を有する両面ディンプルコアを
成形するに際して、成形方法として、めす型成形方式を
基本とする２工程成形法を採用し、１工程目の成形を行
なった後に、当該成形による既成形部に充填材（セラミ
ックキャスタブル等）を充填して２工程目の成形を行な
い、しかる後に充填材を除去するようにしているので、
割れ等の成形不良を発生することなく短時間で成形を行
ない生産性を向上させることが可能な両面ディンプルコ
アの超塑性成形方法が提供できる。[Effects of the Invention] As explained above, according to the present invention, when molding a double-sided dimple core having a plurality of conical protrusions on both sides of a plate-shaped member, a female mold molding method is basically used as a molding method. A two-step molding method is adopted, and after the first step is performed, a filler (ceramic castable, etc.) is filled into the already formed part by the molding, and the second step is performed, and then the filler is applied. I'm trying to remove it, so
It is possible to provide a superplastic forming method for a double-sided dimpled core that can perform forming in a short time without causing forming defects such as cracks and improve productivity.
第１図は本発明による両面ディンプルコアの超塑性成形
方法の一実施例を示す成形過程図、第２図は同実施例に
適用される成形用型の構成例を示す断面図、
第３図は両面ディンプルコアが使用されるサンドイッチ
構造体の一例を示す斜視図、
第４図は両面ディンプルコアを使用する中空翼構造の一
例を示す図、
第５図は従来法による両面ディンプルコアの成形方法を
説明するための成形過程図、
第６図はデインプルユニット（円すい）の基本成形方式
を説明するための図である。
１・・・平板素板、ｌａ、ｌｂ・・・円すい状突起、２
・・・セラミックキャスタブル、３・・・両面ディンプ
ルコア、４・・・下型コンテナー ５，５′・・・成形
型、６，６′・・・上型（押え板）、７・・・平板素材
、７−・・・半成形品、７″・・・完成品、８・・・セ
ラミックキャスタブル。
出願人代理人 弁理士 鈴江武彦
（ａ）
（ｂ）
（ｃ）
第３図
（ｄ）
ｌｂ
第１図Fig. 1 is a forming process diagram showing an example of the superplastic forming method for a double-sided dimple core according to the present invention, Fig. 2 is a cross-sectional view showing an example of the configuration of a mold applied to the same embodiment, and Fig. 3 is a perspective view showing an example of a sandwich structure using a double-sided dimple core, Figure 4 is a diagram showing an example of a hollow wing structure using a double-sided dimple core, and Figure 5 is a conventional method for forming a double-sided dimple core. Fig. 6 is a diagram illustrating the basic forming method of a dimple unit (cone). 1...Flat base plate, la, lb...conical projection, 2
...Ceramic castable, 3...Double-sided dimple core, 4...Lower mold container 5,5'...Molding mold, 6,6'...Upper mold (pressing plate), 7...Flat plate Material, 7-... Semi-molded product, 7''... Finished product, 8... Ceramic castable. Applicant's agent Patent attorney Takehiko Suzue (a) (b) (c) Figure 3 (d) lb Figure 1
Claims (2)
る両面ディンプルコアの成形方法において、 成形方法として、めす型成形方式を基本とする２工程成
形法を採用し、 １工程目の成形を行なった後に、当該成形による既成形
部に充填材を充填して２工程目の成形を行ない、 しかる後に前記充填材を除去するようにしたことを特徴
とする両面ディンプルコアの超塑性成形方法。(1) In the method for forming a double-sided dimple core that has multiple conical protrusions on both sides of a plate-shaped member, a two-step forming method based on a female mold forming method is adopted as the forming method, and the first step is Superplastic forming of a double-sided dimpled core, characterized in that after forming, a filler is filled into the already formed part resulting from the forming, a second step of forming is performed, and the filler is then removed. Method.
用いることを特徴とする請求項（１）項に記載の両面デ
ィンプルコアの超塑性成形方法。(2) The method for superplastic forming a double-sided dimpled core according to claim (1), wherein ceramic castable is used as the filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2215470A JPH04100641A (en) | 1990-08-15 | 1990-08-15 | Superplastic forming method for both-side dimple core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2215470A JPH04100641A (en) | 1990-08-15 | 1990-08-15 | Superplastic forming method for both-side dimple core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04100641A true JPH04100641A (en) | 1992-04-02 |
Family
ID=16672906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2215470A Pending JPH04100641A (en) | 1990-08-15 | 1990-08-15 | Superplastic forming method for both-side dimple core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04100641A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06159297A (en) * | 1992-11-25 | 1994-06-07 | Daikin Ind Ltd | Blower mechanism |
| US5399406A (en) * | 1993-02-05 | 1995-03-21 | Sky Aluminium Co., Ltd. | Paneling material and composite panel using the same |
-
1990
- 1990-08-15 JP JP2215470A patent/JPH04100641A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06159297A (en) * | 1992-11-25 | 1994-06-07 | Daikin Ind Ltd | Blower mechanism |
| US5399406A (en) * | 1993-02-05 | 1995-03-21 | Sky Aluminium Co., Ltd. | Paneling material and composite panel using the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU628450B2 (en) | Method of making superplastically formed and diffusion bonded articles and the articles so made | |
| US5603449A (en) | Forming of diffusion bonded joints in superplastically formed metal structures | |
| JP3832927B2 (en) | Axle case manufacturing method | |
| JP2001314921A (en) | Pressing method for expanding local area thickness | |
| CN110480149B (en) | Ti2AlNb-based alloy four-layer hollow structure and manufacturing method thereof | |
| JP2686340B2 (en) | Composite material molding method | |
| JPH04100641A (en) | Superplastic forming method for both-side dimple core | |
| JP2723344B2 (en) | Precision forging | |
| JP3186980B2 (en) | Method of manufacturing bottomed container for rectangular batteries | |
| JP2010274293A (en) | Method for forging golf club head, and die therefor | |
| JPS59104237A (en) | Forming method of rough material for forging | |
| JPH03268823A (en) | Method for producing a part of nonstretchable from from thin metal plate material and part produced by said method | |
| JPH054908Y2 (en) | ||
| CN114226564B (en) | Integral forming method and forming device for ribbed thin-shell curved surface piece | |
| JPH0442014Y2 (en) | ||
| JP2020189312A (en) | Blank for press molding, method for manufacturing blank for press molding, linked molded product manufacturing method, press molded product manufacturing method, metal mold for press molding, and press molding apparatus | |
| JPH01289531A (en) | Superplastic forging method | |
| JP2687536B2 (en) | Press forming method for bonded materials | |
| JPH0259135A (en) | Manufacture of spider | |
| RU2049628C1 (en) | Method of making laminate structures | |
| JPH0222259Y2 (en) | ||
| JPH0331538B2 (en) | ||
| JPS63286231A (en) | Method for preventing biting of press product at its piling time and press die used for its method | |
| JPH0718446Y2 (en) | Mold for closed forging | |
| JPH04258338A (en) | Method for plastic-working l-shaped cross sectional member |