JP2643765B2 - Manufacturing method of hemispherical titanium alloy forgings - Google Patents
Manufacturing method of hemispherical titanium alloy forgingsInfo
- Publication number
- JP2643765B2 JP2643765B2 JP9849693A JP9849693A JP2643765B2 JP 2643765 B2 JP2643765 B2 JP 2643765B2 JP 9849693 A JP9849693 A JP 9849693A JP 9849693 A JP9849693 A JP 9849693A JP 2643765 B2 JP2643765 B2 JP 2643765B2
- Authority
- JP
- Japan
- Prior art keywords
- hemispherical
- titanium alloy
- manufacturing
- present
- shape
- 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.)
- Expired - Lifetime
Links
Landscapes
- Forging (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、難加工材であるチタン
合金を用いて半球状の鍛造品を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 relates to a method for producing a hemispherical forged product using a titanium alloy which is a difficult-to-process material.
【０００２】[0002]
【従来の技術】チタン合金を用いて半球状の鍛造品を製
造するに際し、従来は、素材を金型に入れた後、上方
からポンチを用いて後方押し出し成形する方法と、円
板状の素材を深絞り加工して成形する方法、が主として
採用されていた。2. Description of the Related Art Conventionally, when manufacturing a hemispherical forged product using a titanium alloy, a method in which a material is put into a mold and then extruded backward from above using a punch, and a disk-shaped material is used. And a method of forming by deep drawing.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前者の
の方法では、半球状という形状に起因して成形荷重が
増大するので、非常に大容量の大型鍛造プレスを必要と
する。また、後者のの方法では、円板状素材を製造す
る際、加工率が大きいので、加工熱により中心部に異常
組織が発生しやすいという問題があった。However, in the former method, since the forming load increases due to the hemispherical shape, a very large capacity large forging press is required. In the latter method, when manufacturing a disc-shaped material, the processing rate is large, and therefore, there is a problem that abnormal heat is easily generated in the central portion due to processing heat.
【０００４】本発明は、上記した従来の問題点に鑑みて
なされたものであり、成形荷重を低下させ、かつ、その
成形過程における異常組織の発生を可及的に抑制できる
半球状チタン合金鍛造品の製造方法を提供することを目
的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and is intended to reduce the forming load and suppress the occurrence of abnormal structure in the forming process as much as possible. It is intended to provide a method for manufacturing a product.
【０００５】[0005]
【課題を解決するための手段】上記した目的を達成する
ために、本発明の半球状チタン合金鍛造品の製造方法
は、得ようとする大きさよりも若干小径で低い高さの半
球状であって、かつ、球部の肉厚を端部にゆくほど厚く
した荒地素材を作成し、かかる形状の荒地素材の底部は
金型との間にギャップを設けた状態で、端部側のみ回転
鍛造することとしているのである。In order to achieve the above-mentioned object, a method for producing a hemispherical titanium alloy forging of the present invention has a hemispherical shape having a slightly smaller diameter and a lower height than the size to be obtained. In addition, a rough ground material with the thickness of the ball part increased toward the end is created, and the bottom of the rough ground material of such a shape is provided with a gap between it and the mold. We are going to do it.
【０００６】[0006]
【作用】本発明の半球状チタン合金鍛造品の製造方法
は、得ようとする大きさよりも若干小径で低い高さの半
球状であって、かつ、球部の肉厚を端部にゆくほど厚く
した荒地素材を作成し、かかる形状の荒地素材の端部側
のみ回転鍛造するので、回転鍛造時における成形荷重が
小さくてすむ。また、本発明方法は、荒地素材の底部は
金型との間にギャップを設けた状態で回転鍛造するの
で、加工熱による中央部の異常組織発生を抑制できる。The method for producing a hemispherical titanium alloy forged product of the present invention is a hemisphere having a slightly smaller diameter and a lower height than the size to be obtained, and the thickness of the sphere is increased toward the end. Since a thick waste material is prepared and the end of the waste material having such a shape is rotationally forged, the forming load during the rotational forging is small. In addition, according to the method of the present invention, since the bottom of the rough ground material is subjected to rotary forging in a state where a gap is provided between the material and the mold, it is possible to suppress the occurrence of abnormal structure in the central portion due to processing heat.
【０００７】[0007]
【実施例】以下、本発明方法を添付図面に示す１実施例
に基づいて説明する。Ｔｉ−６Ａｌ−４Ｖ合金で、図１
に示すような、高さ〔Ｈ1 〕約３００ｍｍ、外径〔ＯＤ
1 〕約５１５ｍｍ、内径〔ＩＤ1 〕約３５５ｍｍの半球
状の荒地素材１を、４０００トンの水圧プレスで作成し
た。このとき、本発明方法にあっては、前記半球状の荒
地素材１の肉厚は全て均一ではなく、端部（図１のＡ
部）にゆくほど厚くなるように形成する。これは、この
後の回転鍛造時に、成形荷重を低減するためである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention will be described below with reference to one embodiment shown in the accompanying drawings. FIG. 1 shows a Ti-6Al-4V alloy.
As shown in the figure, the height [H 1 ] is about 300 mm and the outer diameter [OD
1 ] A hemispherical wasteland material 1 having a diameter of about 515 mm and an inner diameter [ID 1 ] of about 355 mm was prepared by a 4000 ton hydraulic press. At this time, in the method of the present invention, the thickness of the hemispherical wasteland material 1 is not all uniform, and the end portions (A in FIG. 1) are not uniform.
Part), so that the thickness increases. This is to reduce the forming load during the subsequent rotary forging.
【０００８】そして、上記した荒地素材１を回転鍛造機
にセットして回転鍛造し、図２に示すような、高さ〔Ｈ
2 〕約３６０ｍｍ、外径〔ＯＤ2 〕約５５０ｍｍ、内径
〔ＩＤ2 〕約４７０ｍｍの仕上げ形状の半球状の製品２
に鍛造した。このとき、本発明方法にあっては、荒地素
材１の底部（図１のＢ部）と金型との間にギャップを設
けた状態で回転鍛造する。これは、回転鍛造時、底部と
金型が接触していると、加工熱によって底部に異常組織
が発生するからである。Then, the above-mentioned waste material 1 is set on a rotary forging machine and rotary forged, and has a height [H
2 ] A hemispherical product 2 having a finished shape of about 360 mm, an outer diameter [OD 2 ] of about 550 mm, and an inner diameter [ID 2 ] of about 470 mm 2
Forged. At this time, in the method of the present invention, rotary forging is performed in a state where a gap is provided between the bottom of the waste material 1 (portion B in FIG. 1) and the mold. This is because, when the bottom is in contact with the mold during rotary forging, an abnormal structure is generated at the bottom by the processing heat.
【０００９】本発明方法の効果を確認するために、本発
明方法によって製造した上記半球状体から試験片を採取
して各種の実験を行った結果について説明する。なお、
試験片の採取場所等を図３及び表１に示す。In order to confirm the effects of the method of the present invention, the results of various experiments conducted by collecting test specimens from the hemispherical bodies produced by the method of the present invention will be described. In addition,
FIG. 3 and Table 1 show the locations where the test pieces were collected.
【００１０】[0010]
【表１】 [Table 1]
【００１１】引張試験の結果を表２に、切欠ラプチャー
試験の結果を表３に、破壊靱性試験の結果を表４にそれ
ぞれ示す。The results of the tensile test are shown in Table 2, the results of the notch rupture test are shown in Table 3, and the results of the fracture toughness test are shown in Table 4.
【００１２】[0012]
【表２】 [Table 2]
【００１３】[0013]
【表３】 [Table 3]
【００１４】[0014]
【表４】 [Table 4]
【００１５】上記表２〜４に示すように、本発明方法に
よれば、低荷重で難加工材の半球状鍛造品を製造でき、
しかも成形過程に起因する異常組織も発生せず、上記し
た試験結果も良好である。As shown in Tables 2 to 4, according to the method of the present invention, a hemispherical forged product of a difficult-to-process material can be manufactured with a low load.
In addition, no abnormal structure is generated due to the molding process, and the above-mentioned test results are good.
【００１６】[0016]
【発明の効果】以上説明したように、本発明方法によれ
ば、回転鍛造機を用いて低荷重で、しかも、金属組織を
良好に制御して難加工材であるチタン合金の半球状鍛造
品を製造できる。As described above, according to the method of the present invention, a hemispherical forged product of a titanium alloy which is a difficult-to-work material with a low load and a well-controlled metal structure using a rotary forging machine. Can be manufactured.
【図１】回転鍛造前の荒地形状を示す図面である。FIG. 1 is a drawing showing a rough land shape before rotary forging.
【図２】回転鍛造後の仕上げ形状を示す図面である。FIG. 2 is a drawing showing a finished shape after rotational forging.
【図３】本発明方法の効果を示すための実験に使用する
試験片の採取位置を示す図面であり、（ａ）は平面図、
（ｂ）は一部断面して示す正面図である。FIGS. 3A and 3B are diagrams showing a sampling position of a test piece used for an experiment to show the effect of the method of the present invention, wherein FIG.
(B) is a front view showing a partial cross section.
１ 荒地素材 ２ 製品 1 Wasteland materials 2 Products
Claims (1)
造する方法であって、得ようとする大きさよりも若干小
径で低い高さの半球状であって、かつ、球部の肉厚を端
部にゆくほど厚くした荒地素材を作成し、かかる形状の
荒地素材の底部は金型との間にギャップを設けた状態
で、端部側のみ回転鍛造することを特徴とする半球状チ
タン合金鍛造品の製造方法。1. A method for producing a hemispherical forged product using a titanium alloy, wherein the hemispherical shape has a slightly smaller diameter and a lower height than a size to be obtained, and a thickness of a spherical portion. The hemispherical titanium is characterized in that the rough land material is made thicker as it goes to the end, and the bottom of the rough land material of such a shape is rotationally forged only at the end side with a gap provided with the mold. Manufacturing method of alloy forgings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9849693A JP2643765B2 (en) | 1993-03-31 | 1993-03-31 | Manufacturing method of hemispherical titanium alloy forgings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9849693A JP2643765B2 (en) | 1993-03-31 | 1993-03-31 | Manufacturing method of hemispherical titanium alloy forgings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06285574A JPH06285574A (en) | 1994-10-11 |
| JP2643765B2 true JP2643765B2 (en) | 1997-08-20 |
Family
ID=14221257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9849693A Expired - Lifetime JP2643765B2 (en) | 1993-03-31 | 1993-03-31 | Manufacturing method of hemispherical titanium alloy forgings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2643765B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451423B (en) * | 2020-03-19 | 2022-04-19 | 中国船舶重工集团公司第七二五研究所 | Manufacturing process method of titanium alloy ultrahigh-pressure-resistant spherical shell blank |
-
1993
- 1993-03-31 JP JP9849693A patent/JP2643765B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06285574A (en) | 1994-10-11 |
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