JPH0342170A - Method and apparatus for precision casting - Google Patents
Method and apparatus for precision castingInfo
- Publication number
- JPH0342170A JPH0342170A JP17671389A JP17671389A JPH0342170A JP H0342170 A JPH0342170 A JP H0342170A JP 17671389 A JP17671389 A JP 17671389A JP 17671389 A JP17671389 A JP 17671389A JP H0342170 A JPH0342170 A JP H0342170A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molten metal
- heating coil
- base material
- pressure
- 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
- 238000000034 method Methods 0.000 title claims description 16
- 238000005495 investment casting Methods 0.000 title claims description 10
- 239000002184 metal Substances 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 230000006698 induction Effects 0.000 claims abstract description 21
- 230000008018 melting Effects 0.000 claims abstract description 13
- 238000002844 melting Methods 0.000 claims abstract description 13
- 238000005266 casting Methods 0.000 claims abstract description 12
- 238000000465 moulding Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 239000000919 ceramic Substances 0.000 abstract description 6
- 238000007598 dipping method Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910000819 inconels 713 Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- WHOPEPSOPUIRQQ-UHFFFAOYSA-N oxoaluminum Chemical compound O1[Al]O[Al]1 WHOPEPSOPUIRQQ-UHFFFAOYSA-N 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この（ｌ！明は精密鋳造方法及び精密鋳造装置に関する
。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) This invention relates to a precision casting method and a precision casting apparatus.
（従来の技術及び発明が解決しようとする：！１題）従
来一般の精密鋳造方法は、ルツボ炉等の溶解炉で溶かし
た母材溶湯を、ロストソックス法等で作成したセラミッ
クスシェル鋳型に鋳込んで！２囚させるものであった。(Conventional technology and invention try to solve: !1 problem) Conventional general precision casting methods cast molten base material melted in a melting furnace such as a crucible furnace into a ceramic shell mold made by a lost socks method etc. Crowded! It was for two prisoners.
この精密鋳造法は１寸法精度の優れた、鋳肌の奇麗な製
品が得られることから、複雑形状製品の製造法として広
く用いられている。This precision casting method is widely used as a method for manufacturing complex-shaped products because it produces products with excellent one-dimensional accuracy and beautiful cast surfaces.
しかしながらこの＃ＰｆＪａ方法の場合、特に母材が活
性金属である場合、これを溶解炉で溶解したとき或いは
取鍋に取ったときに、溶湯が炉材の耐火材と反応してし
まって、汚染されてしまう困難な問題があった１例えば
Ｔｉを例にとると、これを溶解炉で溶かしたとき、Ｔｉ
溶湯が炉材のアルミナ（Ａｌ２Ｏ２）と反応してＴｉＯ
２を生威し、酸素をピンクアップしてしまう、而してこ
のように酸素を取り込んでしまうと材料特性が低下し、
鋳造品が脆く弱くなってしまう。However, in the case of this #PfJa method, especially when the base metal is an active metal, when it is melted in a melting furnace or taken into a ladle, the molten metal reacts with the refractory material of the furnace material, resulting in contamination. For example, when Ti is melted in a melting furnace, Ti
The molten metal reacts with the furnace material alumina (Al2O2) to form TiO
2 and causes oxygen to pink up, and when oxygen is incorporated in this way, the material properties deteriorate,
The cast product becomes brittle and weak.
また上記９造方法にあっては、溶湯を＃４型に流し込ん
で固化させる際、引は巣を防止するために通常押湯を用
いるが、この押湯は１回限りで使い捨てされるために材
料の歩留りが悪く、加えて本方法では一定量の母材金属
を多量に溶解した上これを１回毎＃４型に鋳込むことか
ら、生産能率が悪い問題も有していた。In addition, in the above-mentioned method 9, a riser is usually used to prevent cavities when pouring the molten metal into the #4 mold and solidifying it, but this riser is used only once and is therefore disposable. In addition, this method had the problem of poor production efficiency because it required a large amount of melted base metal and then cast it into a #4 mold each time.
（課題を解決するための第一解決手段）本発明はこのよ
うな課題を解決するためになされたものであり、而して
本願の第一解決手段は精密鋳造方法に係るものであって
、その要旨は、棒状の母材を下方から上方に向けて連続
的に供給しつつ該母材の上部を誘導加熱コイルにて連続
的に加熱・溶解する一方、ｐＩ造用ｎ型の溶湯注入口を
溶湯部内に突入させ、鋳型内部を前記誘導加熱コイルに
よる溶解空間に対して相対的に減圧状態として溶湯を該
Ｍ［内部に吸引した上架固させるようにしたことにある
。(First solution for solving the problem) The present invention has been made to solve the above problem, and the first solution of the present application relates to a precision casting method, The gist is that a rod-shaped base material is continuously supplied from below to above, and the upper part of the base material is continuously heated and melted using an induction heating coil, while an n-type molten metal inlet for PI manufacturing is The molten metal is injected into the molten metal part, and the inside of the mold is kept under a reduced pressure condition relative to the melting space formed by the induction heating coil, so that the molten metal is sucked into the M and solidified.
（第一解決手段の作用及び効果）
このように本発明では母材が下方から上方に向けて連続
的に供給される。そしてその上部は誘導加熱コイルの加
熱空間内に突入させられ、そこで加熱溶解される。ここ
で溶解により生じた溶湯は、誘導加熱により溶湯表面部
に生じた渦′ｉｔｔ流に基づいて誘導加熱コイルより１
Ｗ、磁斥力（ローレンツ力）を受ける。従って溶湯は誘
導加熱コイルに対して非接触の状態でありながら、同コ
イルによる加熱空間内において下方或いは横方向への流
動を生じず、一定の形状に保持される。(Operations and Effects of the First Solving Means) As described above, in the present invention, the base material is continuously supplied from the bottom to the top. The upper part thereof is thrust into the heating space of the induction heating coil, where it is heated and melted. The molten metal generated by melting here is heated by induction heating coils based on the vortex flow generated on the surface of the molten metal by induction heating.
W, receives magnetic repulsion (Lorentz force). Therefore, although the molten metal is not in contact with the induction heating coil, it does not flow downward or laterally within the space heated by the induction heating coil, and is maintained in a constant shape.
そこでかかる溶湯に対して鋳型の注入口を突入させると
ともに、鋳型の成形空間内部を前記コイルによる溶解空
間に対して相対的に減圧状態とすると、溶湯が鋳型内に
吸い込まれて成形空間内に充填される。そこで鋳型内に
充填された溶湯が凝固したら、鋳型の注入口を溶湯より
抜き出す。Then, when the injection port of the mold is plunged into the molten metal and the pressure inside the molding space of the mold is reduced relative to the melting space created by the coil, the molten metal is sucked into the mold and fills the molding space. be done. Once the molten metal filled in the mold has solidified, the injection port of the mold is removed from the molten metal.
尚、鋳型内に入り込んだ溶湯が凝固する際に体積減少す
るが、このような体積減少が生ずると誘導加熱コイル内
の溶湯が直ちに補給されるため、引は巣を生じることは
ない、即ち本発明の方法では、誘導加熱コイル内の溶湯
が上記電磁斥力に基づく圧力により、更にはまた鋳型内
部の吸引作用により押湯として働き、鋳型内部で体積減
少したら、溶湯が鋳型内に直ちに供給される。Note that when the molten metal that has entered the mold solidifies, its volume decreases, but when such a volume decrease occurs, the molten metal in the induction heating coil is immediately replenished, so no cavities are created. In the method of the invention, the molten metal in the induction heating coil acts as a feeder due to the pressure based on the electromagnetic repulsion and also by the suction action inside the mold, and when the volume decreases inside the mold, the molten metal is immediately supplied into the mold. .
このように本発明においては、母材溶解のために炉を用
いず、誘導加熱コイルにて母材を加熱・溶解する。従っ
て溶解により生じた溶湯が炉材等と接触することがない
から、これに基づ〈溶湯の汚染の問題を生じず、得られ
た鋳造品の特性も良好となる。As described above, in the present invention, a furnace is not used for melting the base material, but the base material is heated and melted using an induction heating coil. Therefore, since the molten metal produced by melting does not come into contact with the furnace material, etc., there is no problem of contamination of the molten metal, and the properties of the obtained cast product are also good.
また上記のように本発明では、誘導加熱コイル内の溶湯
が押湯の働きをなし、しかもこの押湯は１回限りの使い
捨てではなく、次の鋳造に際して製品用の材料として使
用されることとなるために無駄がなく、これにより材料
の歩留率も向上する。Furthermore, as described above, in the present invention, the molten metal in the induction heating coil functions as a feeder, and this feeder is not disposable for one time use, but can be used as a material for the product in the next casting. As a result, there is no waste, which also improves the material yield rate.
更に加えて１本発明は従来のようなバッチ式の鋳造処理
ではなく、材料を連続的に送りつつ鋳造することが可能
であるから、生産能率も高い特長を有する。In addition, the present invention has the advantage of high production efficiency since it is possible to cast the material while continuously feeding it, rather than using the conventional batch-type casting process.
（第二解決手段）
本願の第二解決手段は精密鋳造装置に係るものであって
、その要旨は、下方から上方に向けて連続的に供給され
て来る棒状の母材の上部を加熱・溶解する誘導加熱コイ
ルを設けるとともに、該誘導加熱コイルの上方において
、溶湯を内部の成形空間に導いて凝固させる通気性の鋳
造用鋳型を、該鋳型の溶湯注入部を容器外部に突出させ
る状１８で内部に収容する耐圧容器を減圧装置に連絡し
た状態で設け、該鋳型の成形空間内部を前記誘導加熱コ
イルによる溶解空間に対して相対的に減圧状！！ミとす
ることにより、溶湯を該鋳型の成形空間内部に吸引した
上凝固させるようにしたことにある。(Second solution) The second solution of the present application is related to a precision casting device, and its gist is to heat and melt the upper part of a rod-shaped base material that is continuously supplied from below to above. At the same time, above the induction heating coil, an air-permeable casting mold for introducing the molten metal into the internal molding space and solidifying the mold is provided, and the molten metal injection part of the mold is configured to protrude outside the container. A pressure-resistant container housed inside is connected to a pressure reducing device, and the pressure inside the molding space of the mold is relatively reduced with respect to the melting space created by the induction heating coil. ! By doing so, the molten metal is sucked into the molding space of the mold and then solidified.
（第二解決手段の作用及び効果）
かかる木兄ＩＩの鋳込装置によれば、上記方法を好適に
実施できる。また本発明では耐圧容器を用いてその内部
に通気性の鋳型を収容するようにしているため、耐圧容
器に負圧を導くことにより鋳型の成形空間内を容易に減
圧状追とし得る。(Operations and Effects of Second Solving Means) According to the casting apparatus of Kinoe II, the above method can be carried out suitably. Further, in the present invention, since a pressure-resistant container is used to house a breathable mold, the molding space of the mold can be easily reduced in pressure by introducing negative pressure into the pressure-resistant container.
（実施例）
次に本発明の実施例を図面に基づいて詳しく説Ｉｌｌす
る。(Example) Next, an example of the present invention will be explained in detail based on the drawings.
第１図において１０は棒状の母材であって、下方より誘
導加熱コイル１２の内部に連続的に供給される。In FIG. 1, reference numeral 10 denotes a rod-shaped base material, which is continuously supplied into the induction heating coil 12 from below.
１４は耐圧容器であって真空吸引部１６を有している。14 is a pressure-resistant container and has a vacuum suction section 16.
耐圧容器１４の内部には１通気性のセラミックスシェル
鋳型１８が収容されている。この鋳型１８は溶湯の注入
部２０を有し、この注入部２０が耐圧容器１４）り突出
させられ、その先端の注入口２２が母材上部の溶融部（
溶湯）２４内に突入させられるようになっている。Inside the pressure vessel 14, a ventilated ceramic shell mold 18 is housed. This mold 18 has an injection part 20 for molten metal, and this injection part 20 is made to protrude from the pressure vessel 14), and the injection port 22 at its tip is connected to the molten metal part (
(molten metal) 24.
上記装置を用いて行った鋳造実験の一例を以下に説明す
る。An example of a casting experiment conducted using the above apparatus will be described below.
第１表に示す組成の、外径３０ｍｍのインコネル７１３
Ｃ母材を１周波数８０００Ｈｚ、出力４０ｋｗの誘導加
熱コイル１２に下方から供給した。コイル通電後３０秒
で母材上部が溶融したので、直ちにセラミックスシェル
鋳型１８に溶湯２４を差圧０．１気圧で吸引して鋳込ん
だ、鋳込み後３秒間鋳型１８の注入口２２を溶＠２４中
に没漬して、溶＠２４に押湯効果をもたせた後、鋳５１
８を引き上げてｌサイクルの鋳造を完了した。尚鋳物の
製品重量は１２０ｇ、サイクルタイムは４０秒であった
。Inconel 713 with an outer diameter of 30 mm and the composition shown in Table 1
The C base material was supplied from below to an induction heating coil 12 with a frequency of 8000 Hz and an output of 40 kW. The upper part of the base material melted 30 seconds after the coil was energized, so the molten metal 24 was immediately drawn into the ceramic shell mold 18 with a differential pressure of 0.1 atmosphere and poured. After immersing in 24 to give the molten @24 a riser effect, the casting 51
8 was pulled up to complete one cycle of casting. The weight of the cast product was 120 g, and the cycle time was 40 seconds.
（以下余白）
これによると月間生産量は、２００時間ＪＩＩ動として
２１６０ｋｇとなる。これはＭ密ＰＪ造の１ラインの生
産量としては十分の能力である。(Left below) According to this, the monthly production amount will be 2160 kg based on 200 hours of JII operation. This is sufficient production capacity for one Mimi PJ construction line.
上記押湯の役割を果たした溶Ｗ２４は、次回のｐＪ造時
に鋳造材料として鋳ｙＩｉｔａ内に鋳込まれるので、材
料歩留率は８５％と高率であった。因みに通常の精密鋳
造法では４０％以下の場合が多い、このことからすれば
１本方法の場合、材料の歩留率は著しく高いと言える。The molten W24, which served as the riser, was poured into the casting yIita as a casting material during the next PJ production, so the material yield rate was as high as 85%. Incidentally, in the case of the ordinary precision casting method, the yield rate is often 40% or less. Considering this, it can be said that the yield rate of the material is extremely high in the case of the one-piece method.
加えて本方法では、溶解ルツボ炉が不要であるので製造
コストも安価である利点がある。In addition, this method does not require a melting crucible furnace, so it has the advantage of low manufacturing costs.
以上本発明の実施例を詳述したが、これはあくまで本発
明の一実施例であり、本発明においては例えば鋳型とし
てセラミックス鋳型を用い得るのみならず、金型、カー
ボン型を等を用いることも可能であるなど、その主旨を
逸脱しない範囲において、当業者の知識に基づき様々な
変更を加えた形４１：、 ａ ｊ５様において実施・構
成可能である。Although the embodiments of the present invention have been described in detail above, this is just one embodiment of the present invention, and in the present invention, for example, not only a ceramic mold can be used as the mold, but also a metal mold, a carbon mold, etc. It is possible to implement and configure the system in the form 41:, a j5, with various changes based on the knowledge of those skilled in the art, within the scope of the spirit of the invention.
第１図は本発明の一実施例装置の概格構成図である。 ｌＯ：母材 １２：誘導加熱コイル １４：耐圧容器 １８：セラミックスシェル鋳型 ２４：溶湯 第 図 FIG. 1 is a schematic diagram of an apparatus according to an embodiment of the present invention. lO: base material 12: Induction heating coil 14: Pressure-resistant container 18: Ceramic shell mold 24: Molten metal No. figure
Claims (2)
しつつ該母材の上部を誘導加熱コイルにて連続的に加熱
・溶解する一方、鋳造用鋳型の溶湯注入口を溶湯部内に
突入させ、鋳型内部を前記誘導加熱コイルによる溶解空
間に対して相対的に減圧状態として溶湯を該鋳型内部に
吸引した上凝固させることを特徴とする精密鋳造方法。(1) While continuously supplying a rod-shaped base material from below to above, the upper part of the base material is continuously heated and melted by an induction heating coil, while the molten metal inlet of the casting mold is inserted into the molten metal part. A precision casting method characterized in that the molten metal is sucked into the mold and solidified after the mold is plunged into the mold and the pressure inside the mold is reduced relative to the melting space formed by the induction heating coil.
状の母材の上部を加熱・溶解する誘導加熱コイルを設け
るとともに、該誘導加熱コイルの上方において、溶湯を
内部の成形空間に導いて凝固させる通気性の鋳造用鋳型
を、該鋳型の溶湯注入部を容器外部に突出させる状態で
内部に収容する耐圧容器を減圧装置に連絡した状態で設
け、該鋳型の成形空間内部を前記誘導加熱コイルによる
溶解空間に対して相対的に減圧状態とすることにより、
溶湯を該鋳型の成形空間内部に吸引した上凝固させるよ
うにしたことを特徴とする精密鋳造装置。(2) An induction heating coil is provided to heat and melt the upper part of the rod-shaped base material that is continuously supplied from the bottom to the top, and above the induction heating coil, the molten metal is guided into the internal molding space. A pressure-resistant container containing an air-permeable casting mold for solidification with the molten metal injection part of the mold protruding outside the container is provided in communication with a pressure reduction device, and the inside of the molding space of the mold is By creating a relatively reduced pressure state with respect to the melting space by the heating coil,
A precision casting apparatus characterized in that the molten metal is sucked into the molding space of the mold and then solidified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1176713A JP2541312B2 (en) | 1989-07-07 | 1989-07-07 | Precision casting method and precision casting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1176713A JP2541312B2 (en) | 1989-07-07 | 1989-07-07 | Precision casting method and precision casting apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0342170A true JPH0342170A (en) | 1991-02-22 |
| JP2541312B2 JP2541312B2 (en) | 1996-10-09 |
Family
ID=16018460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1176713A Expired - Lifetime JP2541312B2 (en) | 1989-07-07 | 1989-07-07 | Precision casting method and precision casting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2541312B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102114528A (en) * | 2009-12-31 | 2011-07-06 | 北京航空航天大学 | Method and device for manufacturing metal pipe |
| US8056608B2 (en) | 2008-04-25 | 2011-11-15 | Goodwin Plc | Method of mitigating against thermal contraction induced cracking during casting of a super Ni alloy |
| CN109402424A (en) * | 2018-12-06 | 2019-03-01 | 江苏隆达超合金航材有限公司 | Copper and the high temperature alloy plug of copper alloy and preparation method thereof are rolled applied to planetary rolling |
-
1989
- 1989-07-07 JP JP1176713A patent/JP2541312B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8056608B2 (en) | 2008-04-25 | 2011-11-15 | Goodwin Plc | Method of mitigating against thermal contraction induced cracking during casting of a super Ni alloy |
| CN102114528A (en) * | 2009-12-31 | 2011-07-06 | 北京航空航天大学 | Method and device for manufacturing metal pipe |
| CN109402424A (en) * | 2018-12-06 | 2019-03-01 | 江苏隆达超合金航材有限公司 | Copper and the high temperature alloy plug of copper alloy and preparation method thereof are rolled applied to planetary rolling |
| CN109402424B (en) * | 2018-12-06 | 2020-12-15 | 江苏隆达超合金航材有限公司 | High-temperature alloy core rod applied to rolling copper and copper alloy by planetary rolling mill and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2541312B2 (en) | 1996-10-09 |
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