JPH0751825A - Centrifugal casting method - Google Patents
Centrifugal casting methodInfo
- Publication number
- JPH0751825A JPH0751825A JP22800293A JP22800293A JPH0751825A JP H0751825 A JPH0751825 A JP H0751825A JP 22800293 A JP22800293 A JP 22800293A JP 22800293 A JP22800293 A JP 22800293A JP H0751825 A JPH0751825 A JP H0751825A
- Authority
- JP
- Japan
- Prior art keywords
- titanium
- mold cavity
- mold
- casting
- molten metal
- 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.)
- Withdrawn
Links
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、薄肉部を有する精密
鋳物を製造するための遠心鋳造法に関するものであり、
特に溶湯流動性の低い金属または合金、例えばチタンま
たはチタン合金で薄肉部のある精密鋳物を製造するため
の遠心鋳造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 centrifugal casting method for producing a precision casting having a thin portion,
In particular, the present invention relates to a centrifugal casting method for producing a precision casting having a thin portion from a metal or alloy having a low melt fluidity, such as titanium or a titanium alloy.
【０００２】[0002]
【従来の技術】一般に、薄肉部を有する精密鋳物は、図
４に示されるような、湯口１および鋳型キャビティ３を
有する精密鋳造鋳型を用意し、この精密鋳造鋳型の湯口
１を中心としてＡ方向に回転させながら溶湯を湯口１か
ら注入することにより製造される。その際、湯口１から
注入され流れて鋳型キャビティ３の中央部に達した溶湯
は、遠心力により鋳型キャビティ３の隅々まで行きわた
り、精密鋳物が形成される。2. Description of the Related Art Generally, for a precision casting having a thin portion, a precision casting mold having a sprue 1 and a casting mold cavity 3 as shown in FIG. 4 is prepared. It is manufactured by pouring the molten metal through the sprue 1 while rotating it in the direction. At that time, the molten metal that has been poured from the sprue 1 and flowed to reach the central portion of the mold cavity 3 is spread to every corner of the mold cavity 3 by a centrifugal force to form a precision casting.
【０００３】[0003]
【発明が解決しようとする課題】その際、遠心力を受け
た溶湯は、一部飛散しながら湯玉となって鋳型キャビテ
ィ３に充填されることがあり、溶湯がＮｉ基合金、Ｆｅ
基合金などの溶湯のように、湯流れ性の良い比較的低融
点合金溶湯の場合は、飛散して湯玉が出来ても再溶解す
るので実害はない。At this time, the molten metal subjected to the centrifugal force sometimes fills the mold cavity 3 as a molten metal ball while being partly scattered, and the molten metal is a Ni-based alloy or Fe.
In the case of a relatively low-melting-point alloy melt having a good flowability, such as a base alloy melt, even if it scatters and a molten metal ball is formed, it is re-melted and is not harmful.
【０００４】しかし、チタンまたはチタン合金のように
高融点でその溶湯が湯流れ性が悪い金属または合金の溶
湯は、溶湯が飛散して湯玉ができると、湯玉は鋳型キャ
ビティ３の内壁に付着して再溶解することがないところ
から、得られた精密鋳物の表面に湯じわを生じせしめ、
湯じわの有する鋳物は表面研削などの後処理を必要と
し、鋳型キャビティ３の中でも特に超薄肉部分がある
と、その箇所に湯玉が付着して閉塞し、湯回り不良を生
じることがあった。However, when a molten metal such as titanium or a titanium alloy has a high melting point and its melt flowability is poor, when the molten metal is scattered to form a molten metal, the molten metal adheres to the inner wall of the mold cavity 3. Since it does not dissolve again, it causes wrinkles on the surface of the obtained precision casting,
The casting that the wrinkle has requires post-treatment such as surface grinding, and if there is an extremely thin portion in the mold cavity 3, a molten metal may adhere to that portion and block it, resulting in a defective molten metal. It was
【０００５】[0005]
【課題を解決するための手段】そこで、本発明者等は、
かかる欠陥が生ずることのない遠心鋳造法を開発すべく
研究を行った結果、図１に示されるような、湯道２が薄
肉キャビティ３の周囲に通じる精密鋳造鋳型を作製し、
この精密鋳造鋳型をＡ方向に回転させながらチタンまた
はチタン合金溶湯を湯口１に注入すると、湯道２を通っ
たチタンまたはチタン合金溶湯は鋳型キャビティ３の周
辺部から常に遠心力を受けながら鋳型キャビティ３の内
部に導入し、そのため、チタンまたはチタン合金溶湯は
飛散することなく鋳型キャビティ３の周囲から充填さ
れ、得られた鋳物に湯じわが生ずることがなく、したが
って、表面研削などの後処理を必要とせず、また湯回り
不良を生ずることもないという研究結果が得られたので
ある。Therefore, the present inventors have
As a result of research to develop a centrifugal casting method that does not cause such defects, as shown in FIG. 1, a precision casting mold in which the runner 2 communicates with the periphery of the thin cavity 3 is produced,
When the molten titanium or titanium alloy is poured into the sprue 1 while rotating this precision casting mold in the A direction, the titanium or titanium alloy melt that has passed through the runner 2 is always subjected to centrifugal force from the peripheral portion of the mold cavity 3, and the mold cavity is kept. 3 so that the molten titanium or titanium alloy is filled from the periphery of the mold cavity 3 without splashing, and the obtained casting is free from wrinkles, so that post-treatment such as surface grinding is performed. The research results were obtained that it was not necessary and that it did not cause poor bathing.
【０００６】この発明は、かかる研究結果にもとづいて
なされたものであって、溶湯を遠心力に逆らって鋳型キ
ャビティ内に供給する遠心鋳造法に特徴を有するもので
ある。The present invention has been made based on the results of such research, and is characterized by a centrifugal casting method in which molten metal is fed into a mold cavity against centrifugal force.
【０００７】この発明の遠心鋳造法で使用される精密鋳
造鋳型は、図１に示される鋳型キャビティ３が１個有す
るものに限定されるものではなく、図２に示されるよう
に複数の鋳型キャビティ３を有する精密鋳造鋳型を用い
ることもでき、さらに図３に示されるように、湯道２が
上方で湯口１と連絡し、溶湯が上方から供給するように
した精密鋳造鋳型を使用することもできる。いずれにし
ても、この発明の遠心鋳造法は、湯道２が鋳型キャビテ
ィ３の周囲に連絡している精密鋳造鋳型を使用し、湯道
２から鋳型キャビティ３に常に遠心力を受けながら溶湯
が注入されるようになっている。The precision casting mold used in the centrifugal casting method of the present invention is not limited to one having one mold cavity 3 shown in FIG. 1, but a plurality of mold cavities as shown in FIG. It is also possible to use a precision casting mold having No. 3 and, as shown in FIG. 3, a precision casting mold in which the runner 2 communicates with the sprue 1 above and the molten metal is supplied from above. it can. In any case, the centrifugal casting method of the present invention uses a precision casting mold in which the runner 2 is in contact with the periphery of the mold cavity 3, and the molten metal is constantly subjected to centrifugal force from the runner 2 to the mold cavity 3. It is supposed to be injected.
【０００８】この発明の遠心鋳造法は、いかなる金属ま
たは合金の遠心鋳造にも適用可能であるが、特に湯流れ
性の悪い高融点のチタンまたはチタン合金の遠心鋳造に
優れた効果を発揮するものである。The centrifugal casting method of the present invention can be applied to the centrifugal casting of any metal or alloy, but it exhibits an excellent effect particularly on the centrifugal casting of high melting point titanium or titanium alloy having poor melt flowability. Is.
【０００９】[0009]
【実施例】いずれもワックスからなり、厚さ：１mm、外
径：５００mm、内径：１００mmの寸法を有するリング状
薄肉部、湯口部および湯道部を有する図１とほぼ同一形
状のワックス模型を作製し、このワックス模型の表面に
通常の方法によりアルミナセラミック鋳型を被覆し、つ
いで加熱して脱ろう処理したのち焼成することにより、
湯口、湯道およびリング状薄肉キャビティを有するアル
ミナ製精密鋳造鋳型を作製した。[Examples] A wax model having substantially the same shape as that shown in FIG. 1, which is made of wax and has a ring-shaped thin portion having a thickness of 1 mm, an outer diameter of 500 mm, and an inner diameter of 100 mm, a sprue portion and a runner portion. By making, coating the surface of this wax model with an alumina ceramic mold by a usual method, then heating and dewaxing, and then firing,
An alumina precision casting mold having a sprue, runner and ring-shaped thin cavity was prepared.
【００１０】一方、Ｔｉ−６％Ａｌ−４％Ｖ（重量％）
の組成を有するＴｉ合金製電極を用意し、このＴｉ合金
製電極を真空スカル・アーク溶解し、温度：１，９００
℃のＴｉ合金溶湯を作製した。On the other hand, Ti-6% Al-4% V (% by weight)
A Ti alloy electrode having the composition of 1 is prepared, and the Ti alloy electrode is vacuum skull-arc melted, and the temperature is 1,900.
A Ti alloy molten metal having a temperature of ℃ was prepared.
【００１１】このＴｉ合金溶湯を、リング状薄肉キャビ
ティの中心を軸とし、回転数：４００r.p.m.で回転する
上記アルミナ製精密鋳造鋳型の湯口に注入し、厚さ：１
mm、外径：４５０mm、内径：１００mmの寸法を有するチ
タン合金製薄肉リング状円板を作製した。This Ti alloy melt was poured into the sprue of the alumina precision casting mold rotating at a rotation speed of 400 rpm with the center of the ring-shaped thin cavity as an axis, and the thickness: 1
A thin ring disk made of titanium alloy having dimensions of mm, outer diameter: 450 mm, inner diameter: 100 mm was produced.
【００１２】得られたチタン合金製薄肉リング状円板を
取り出し、湯回り不良の有無および鋳肌の状態を観察し
たが、湯回り不良は見られず、さらに鋳肌に湯じわなど
の欠陥も見られなかった。The thin ring disk made of titanium alloy thus obtained was taken out and observed for the presence or absence of defective running and the condition of the casting surface. No defective running was observed, and further defects such as wrinkles were found on the casting surface. Could not be seen.
【００１３】一方、比較のために、熱さ：１mm、直径：
４５０mmのリング状薄肉部を有し、このリング状薄肉部
の中心に湯口部を設けた、ほぼ図４と同一形状のワック
ス模型を作製し、このワックス模型を用い、アルミナセ
ラミック鋳型の被覆、脱ろう処理および焼成を施すこと
によりアルミナ製精密鋳造鋳型を作製し、このアルミナ
製精密鋳造鋳型を湯口を中心として回転数：４００r.p.
m で回転している上記アルミナ製精密鋳造鋳型の湯口に
注入し、厚さ：１mm、直径：４５０mmのチタン合金製薄
肉円板を作製した。On the other hand, for comparison, heat: 1 mm, diameter:
A wax model having a ring-shaped thin part of 450 mm and a sprue part provided at the center of the ring-shaped thin part was prepared, and the wax model having substantially the same shape as that shown in FIG. 4 was prepared. A precision casting mold made of alumina is produced by performing a brazing treatment and firing, and the precision casting mold made of alumina is rotated about the sprue at a rotation speed of 400 r.p.
It was poured into the sprue of the above-mentioned alumina precision casting mold rotating at m 2, and a thin disk made of titanium alloy having a thickness of 1 mm and a diameter of 450 mm was produced.
【００１４】得られたチタン合金製薄肉円板には一部湯
回り不良が発生しており、その円板の鋳肌には湯じわが
見られた。A part of the obtained titanium alloy thin-walled disc was defective in hot-wiring, and wrinkles were observed on the casting surface of the disc.
【００１５】[0015]
【発明の効果】この発明の遠心鋳造法によると、チタン
またはチタン合金などの湯流れ性の悪い金属溶湯であっ
ても、湯回り不良、湯じわなどの欠陥が発生することな
く、タービン、ディスクなどの薄肉部のある精密鋳物を
製造することができ、精密鋳物の不良発生率が低下する
ためにコストが低下するなどの産業上すぐれた効果を奏
するものである。EFFECTS OF THE INVENTION According to the centrifugal casting method of the present invention, even with a molten metal such as titanium or a titanium alloy having a poor flowability, a turbine, It is possible to manufacture a precision casting having a thin portion such as a disk, and it is possible to produce an excellent industrial effect such as a reduction in cost due to a reduction in the defect occurrence rate of the precision casting.
【図１】この発明の遠心鋳造法で使用する精密鋳造鋳型
の湯口、湯道および鋳型キャビティを示す斜視説明図で
ある。FIG. 1 is a perspective explanatory view showing a sprue, a runner and a mold cavity of a precision casting mold used in the centrifugal casting method of the present invention.
【図２】この発明の遠心鋳造法で使用する精密鋳造鋳型
の湯口、湯道および鋳型キャビティを示す斜視説明図で
ある。FIG. 2 is a perspective explanatory view showing a sprue, a runner and a mold cavity of a precision casting mold used in the centrifugal casting method of the present invention.
【図３】この発明の遠心鋳造法で使用する精密鋳造鋳型
の湯口、湯道および鋳型キャビティを示す斜視説明図で
ある。FIG. 3 is a perspective explanatory view showing a sprue, a runner and a mold cavity of a precision casting mold used in the centrifugal casting method of the present invention.
【図４】従来の遠心鋳造法で使用する精密鋳造鋳型の湯
口および鋳型キャビティを示す斜視説明図である。FIG. 4 is a perspective explanatory view showing a sprue and a mold cavity of a precision casting mold used in a conventional centrifugal casting method.
１ 湯口 ２ 湯道 ３ 鋳型キャビティ 1 spout 2 runner 3 mold cavity
Claims (3)
内に供給することを特徴とする遠心鋳造法。1. A centrifugal casting method characterized in that the molten metal is supplied into the mold cavity against the centrifugal force.
周囲から遠心力に逆らって鋳型キャビティ内に供給する
ことを特徴とする請求項１記載の遠心鋳造法。2. The centrifugal casting method according to claim 1, wherein the molten metal is supplied from the periphery of the rotating mold cavity against the centrifugal force into the mold cavity.
湯であることを特徴とする請求項１または２記載の遠心
鋳造法。3. The centrifugal casting method according to claim 1, wherein the molten metal is titanium or titanium alloy molten metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22800293A JPH0751825A (en) | 1993-08-20 | 1993-08-20 | Centrifugal casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22800293A JPH0751825A (en) | 1993-08-20 | 1993-08-20 | Centrifugal casting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0751825A true JPH0751825A (en) | 1995-02-28 |
Family
ID=16869643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22800293A Withdrawn JPH0751825A (en) | 1993-08-20 | 1993-08-20 | Centrifugal casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0751825A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011183420A (en) * | 2010-03-07 | 2011-09-22 | Fujino Gijutsu Consultant:Kk | Apparatus and method for vertical casting |
| CN109967714A (en) * | 2019-05-07 | 2019-07-05 | 上海工程技术大学 | Composite centrifugal casting mold for annular titanium alloy part |
-
1993
- 1993-08-20 JP JP22800293A patent/JPH0751825A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011183420A (en) * | 2010-03-07 | 2011-09-22 | Fujino Gijutsu Consultant:Kk | Apparatus and method for vertical casting |
| CN109967714A (en) * | 2019-05-07 | 2019-07-05 | 上海工程技术大学 | Composite centrifugal casting mold for annular titanium alloy part |
| CN109967714B (en) * | 2019-05-07 | 2021-06-11 | 上海工程技术大学 | Composite centrifugal casting mould for titanium alloy ring-shaped piece |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20001031 |