JPH04303601A - Manufacture of precision hollow ceramic body - Google Patents
Manufacture of precision hollow ceramic bodyInfo
- Publication number
- JPH04303601A JPH04303601A JP9269891A JP9269891A JPH04303601A JP H04303601 A JPH04303601 A JP H04303601A JP 9269891 A JP9269891 A JP 9269891A JP 9269891 A JP9269891 A JP 9269891A JP H04303601 A JPH04303601 A JP H04303601A
- Authority
- JP
- Japan
- Prior art keywords
- port liner
- hollow ceramic
- deformation
- ceramic
- precision
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000000034 method Methods 0.000 claims description 9
- 238000010304 firing Methods 0.000 claims description 8
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Producing Shaped Articles From Materials (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は精密セラミック体の製造
方法に係り、さらに詳しくはアズファイヤーで精密なセ
ラミックス製品を製造することができる精密中空セラミ
ック体の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing precision ceramic bodies, and more particularly to a method for manufacturing precision hollow ceramic bodies that can manufacture precision ceramic products using asfire.
【０００２】0002
【従来の技術】セラミック製品は焼成工程が必要である
ため、アズファイヤーで精密製品、部品を作製すること
は、従来ほとんど行なわれておらず、精度が要求される
部分は研削加工を行なうことが一般的である。例えば、
タービン羽根は精度が要求されるが、他の部品との接合
がないため、多少精度が悪い場合であってもそれほど問
題にはならない。具体的には、セラミックタービンロー
タは、全長が４０ｍｍ、支持部から先端までが約２０ｍ
ｍで、０．４ｍｍの精度となっている。また、精度が要
求される部分は中実部品であるため、焼成変形はそれほ
ど生じない。[Prior Art] Since ceramic products require a firing process, precision products and parts have rarely been manufactured using Azfire, and parts that require precision are ground. Common. for example,
Turbine blades require precision, but since there are no connections with other parts, even if the precision is somewhat poor, it is not a big problem. Specifically, the ceramic turbine rotor has a total length of 40 mm and a distance of approximately 20 m from the support to the tip.
m, the accuracy is 0.4 mm. Furthermore, since the parts that require precision are solid parts, firing deformation does not occur much.
【０００３】上記のような理由から、アズファイヤーで
セラミック製品を作製する手法は完全には確立されてお
らず、またその要請もなかった。従来において採用され
ている手法としては、セラミック成形体について、所定
位置のずれをＸ，Ｙ，Ｚ軸毎に測定し、これをフィード
バックして割り掛けを行なうことによりなされていた。
すなわち、位置のずれを点の変化で測定している手法で
ある。[0003] For the reasons mentioned above, a method for producing ceramic products using azufire has not been completely established, nor has there been any demand for it. Conventionally, the method employed is to measure the deviation of a predetermined position of a ceramic molded body for each of the X, Y, and Z axes, and to calculate the deviation by feeding back the measured values. In other words, this is a method that measures positional deviation by changes in points.
【０００４】ところで、近年になり、自動車排ガスによ
る環境汚染が重大な社会問題となっており、この問題を
解決する方法の一つとしてエンジンの排気ポートの内面
をセラミック製のポートライナーによってライニングし
、その断熱作用により排ガス温度を上昇させることが提
案されている。このセラミック製のポートライナーは、
上記のように自動車の通気管の一部であり、その精度が
悪いと他部品との接続部で排ガスの流れに乱れが生じ、
排ガスのエネルギー損失が大きくなるという問題がある
。さらに、エンジンの組立製造工程として、セラミック
部品を金型に嵌合し、全体を加熱する工程があり、この
際、セラミックポートライナーが金型に精度良く接触せ
ず隙間が生じると、熱伝達が悪くなるほか、金型に嵌合
しないという問題が生じる。Incidentally, in recent years, environmental pollution caused by automobile exhaust gas has become a serious social problem, and one way to solve this problem is to line the inner surface of the engine exhaust port with a ceramic port liner. It has been proposed to increase the exhaust gas temperature by an adiabatic effect. This ceramic port liner is
As mentioned above, it is a part of the car's ventilation pipe, and if its accuracy is poor, the flow of exhaust gas will be disrupted at the connection with other parts.
There is a problem in that the energy loss of exhaust gas increases. Furthermore, as part of the engine assembly manufacturing process, there is a process in which ceramic parts are fitted into a mold and the whole is heated. At this time, if the ceramic port liner does not make accurate contact with the mold and a gap is created, heat transfer will be poor. In addition, there is a problem in that it does not fit into the mold.
【０００５】[0005]
【発明が解決しようとする課題】そこで、セラミック製
のポートライナーを従来の手法によりアズファイヤーで
製造したところ、従来の手法は上記のように、位置のず
れを点の変化で測定しているだけであるため、途中部分
の変形を考慮しておらず、三次元的な焼成変形をフィー
ドバックし難く、従って、フィードバックの回数を増や
しても三次元的な精度の向上に限界があった。[Problem to be Solved by the Invention] Therefore, when a ceramic port liner was manufactured using azufire using a conventional method, it was found that the conventional method only measures the positional deviation by changes in points, as described above. Therefore, it is difficult to feed back the three-dimensional firing deformation because the deformation in the middle part is not taken into account, and therefore there is a limit to the improvement of the three-dimensional precision even if the number of times of feedback is increased.
【０００６】[0006]
【課題を解決するための手段】従って、本発明の目的は
、アズファイヤーで精密なセラミックス製品を製造する
ことができる精密中空セラミック体の製造方法を提供す
ることにある。そして、その目的は本発明によれば、表
面に３次元自由曲面を有する中空セラミック体を製造す
るに当り、中空セラミック成形体において曲面上に一つ
以上の基準線を取り、該中空セラミック成形体を焼成後
、前記成形体における基準線の焼成体における変形量を
測定し、その基準線の変形量をフィードバックし、焼成
変形量を考慮して割り掛けすることからなる精密中空セ
ラミック体の製造方法、により達成することができる。
また、本発明においては、中空セラミック成形体の基準
線として、稜線、谷線、外形線および／あるいは断面を
取ることが、それらの部分が変形量の大きいところであ
ることから、好ましい。SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method for manufacturing precision hollow ceramic bodies that can produce precision ceramic products using asfire. According to the present invention, when manufacturing a hollow ceramic body having a three-dimensional free-form surface on the surface, one or more reference lines are taken on the curved surface of the hollow ceramic molded body, and the hollow ceramic body is After firing, the amount of deformation in the fired body on a reference line of the molded body is measured, the amount of deformation on the reference line is fed back, and the amount of deformation on the fired body is multiplied by taking into account the amount of deformation on firing. This can be achieved by . Further, in the present invention, it is preferable to take a ridge line, a valley line, an outline line, and/or a cross section as the reference line of the hollow ceramic molded body because these areas are areas where the amount of deformation is large.
【０００７】[0007]
【作用】本発明によれば、セラミック体のうち変形の大
きな部分についていくつかの基準線を設定し、これらの
基準線の焼成体における変形量を測定し、フィードバッ
クしているので、３次元的な焼成変形を考慮したフィー
ドバックが出来、そのため表面に３次元自由曲面を有す
る中空セラミック体であっても、アズファイヤーで精密
なセラミック体を製造することができる。[Operation] According to the present invention, several reference lines are set for parts of the ceramic body that are largely deformed, and the amount of deformation in the fired body of these reference lines is measured and fed back, so three-dimensional Feedback can be performed taking into account firing deformation, and therefore, even hollow ceramic bodies with three-dimensional free-form surfaces on their surfaces can be manufactured with Asfire.
【０００８】[0008]
【実施例】以下、本発明の実施例を図面に基づいて説明
するが、本発明はこれらの実施例に限られるものではな
い。図１はセラミック製のポートライナーの一例を示す
斜視図で、ポートライナー１はシリンダー側に二つのバ
ルブ穴２を有し、エグゾーストマニホールド側に一つの
排気口３を有する、表面に３次元自由曲面を持った複雑
形状の中空セラミック体である。EXAMPLES Examples of the present invention will be described below with reference to the drawings, but the present invention is not limited to these examples. Figure 1 is a perspective view showing an example of a ceramic port liner. The port liner 1 has two valve holes 2 on the cylinder side, one exhaust port 3 on the exhaust manifold side, and has a three-dimensional free-form surface on the surface. It is a hollow ceramic body with a complex shape.
【０００９】まず、このポートライナー１について、図
１〜図３に示すように、稜線Ａ，Ｂ、谷線Ｃ、端面の外
周Ｄ，Ｅ，Ｆ、および外形線Ｇ，Ｈを基準線として採用
し、その寸法を測定する。次いで、ＣＡＤ（Ｃｏｍｐｕ
ｔｅｒ Ａｉｄｅｄ Ｄｅｓｉｇｎ） システムを用い
て、ポートライナー１の成形型を設計し、作成する。次
に、得られた成形型を用いて、ポートライナー成形体を
成形し、乾燥・焼成して、ポートライナー焼成体を製造
する。First, regarding this port liner 1, as shown in FIGS. 1 to 3, the ridge lines A and B, the valley line C, the outer circumferences D, E, and F of the end face, and the outline lines G and H are used as reference lines. , measure its dimensions. Next, CAD (Computer
A mold for the port liner 1 is designed and created using the ter Aided Design system. Next, using the obtained mold, a port liner molded body is molded, dried and fired to produce a port liner fired body.
【００１０】ここで得られたポートライナー焼成体につ
いて、３次元測定器、投影機、ノギス等を用いて、ポー
トライナー成形体における前記した稜線Ａ，Ｂ、谷線Ｃ
、端面の外周Ｄ，Ｅ，Ｆ、および外形線Ｇ，Ｈ等の基準
線について、得られた焼成体における夫々の寸法、およ
び位置関係を３次元的に測定し、夫々の変形量を３次元
的に調べる。ここで得られた変形量を、前記ＣＡＤシス
テムでの成形型の設計にフィードバックすることにより
、ポートライナー等の表面に３次元自由曲面を有する複
雑形状の中空セラミック体であっても、アズファイヤー
で精密な中空セラミック体を作製・製造することができ
る。[0010] Regarding the port liner fired body obtained here, using a three-dimensional measuring device, a projector, a caliper, etc., the above-mentioned ridge lines A, B and valley line C of the port liner molded body were measured.
, the outer circumferences D, E, and F of the end faces, and the reference lines such as the outline lines G and H, the respective dimensions and positional relationships in the obtained fired body are three-dimensionally measured, and the respective deformations are three-dimensionally measured. Investigate. By feeding back the amount of deformation obtained here to the mold design using the CAD system, even complex-shaped hollow ceramic bodies with three-dimensional free-form surfaces on the surface, such as port liners, can be precisely processed using Asfire. It is possible to create and manufacture a hollow ceramic body.
【００１１】因に、本発明により製造されるアズファイ
ヤーのセラミックポートライナーの精度は、全長１００
ｍｍ〜５００ｍｍ、厚さ３ｍｍで、０．３５ｍｍ程度が
達成できた。なお、本発明が好ましく適用できる表面に
３次元自由曲面を有する中空セラミック体としては、セ
ラミックポートライナーの他に、エグゾーストマニホー
ルド、管のエルボー部などを挙げることができる。Incidentally, the accuracy of the azufire ceramic port liner manufactured according to the present invention is 100 mm in total length.
mm to 500 mm and thickness of 3 mm, approximately 0.35 mm was achieved. In addition to ceramic port liners, examples of hollow ceramic bodies having three-dimensional free-form surfaces to which the present invention can be preferably applied include exhaust manifolds, elbow portions of pipes, and the like.
【００１２】0012
【発明の効果】以上説明したように、本発明によれば、
３次元的な焼成変形を考慮しているため、表面に３次元
自由曲面を有する複雑形状の中空セラミック体について
、アズファイヤーで精密なセラミック焼成体を製造する
ことができる。[Effects of the Invention] As explained above, according to the present invention,
Since three-dimensional firing deformation is taken into consideration, it is possible to manufacture a precise ceramic fired ceramic body using asfire for a complex-shaped hollow ceramic body having a three-dimensional free-form surface on the surface.
【図１】セラミック製のポートライナーの一例を示す斜
視図である。FIG. 1 is a perspective view showing an example of a ceramic port liner.
【図２】ポートライナーの基準線の例を示す説明図であ
る。FIG. 2 is an explanatory diagram showing an example of a reference line of a port liner.
【図３】ポートライナーの基準線の例を示す説明図であ
る。FIG. 3 is an explanatory diagram showing an example of a reference line of a port liner.
１ ポートライナー ２ バルブ穴 ３ 排気口 1 Port liner 2 Valve hole 3 Exhaust port
Claims (2)
ラミック体を製造するに当り、中空セラミック成形体に
おいて曲面上に一つ以上の基準線を取り、該中空セラミ
ック成形体を焼成後、前記成形体における基準線の焼成
体における変形量を測定し、その基準線の変形量をフィ
ードバックすることを特徴とする精密中空セラミック体
の製造方法。1. In manufacturing a hollow ceramic body having a three-dimensional free-form surface on the surface, one or more reference lines are drawn on the curved surface of the hollow ceramic molded body, and after firing the hollow ceramic molded body, the molded A method for manufacturing a precision hollow ceramic body, characterized by measuring the amount of deformation in a fired body of a reference line in the body, and feeding back the amount of deformation of the reference line.
、谷線、外形線および／あるいは断面である請求項１記
載の精密中空セラミック体の製造方法。2. The method for manufacturing a precision hollow ceramic body according to claim 1, wherein the reference line of the hollow ceramic molded body is a ridge line, a valley line, an outline line, and/or a cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3092698A JP2578531B2 (en) | 1991-03-30 | 1991-03-30 | Manufacturing method of precision hollow ceramic body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3092698A JP2578531B2 (en) | 1991-03-30 | 1991-03-30 | Manufacturing method of precision hollow ceramic body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04303601A true JPH04303601A (en) | 1992-10-27 |
| JP2578531B2 JP2578531B2 (en) | 1997-02-05 |
Family
ID=14061721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3092698A Expired - Lifetime JP2578531B2 (en) | 1991-03-30 | 1991-03-30 | Manufacturing method of precision hollow ceramic body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2578531B2 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6092807A (en) * | 1983-10-27 | 1985-05-24 | 株式会社長谷川工務店 | Formwork made of ceramic and manufacture thereof |
| JPS6112869A (en) * | 1984-06-15 | 1986-01-21 | ヘンケル・コーポレイション | Copper coating agent and method for irony surface |
| JPH0199803A (en) * | 1987-10-13 | 1989-04-18 | Ngk Insulators Ltd | Production of ceramics port liner |
| JPH01129948A (en) * | 1987-11-16 | 1989-05-23 | Murata Mfg Co Ltd | Low-shrinkage ceramics |
| JPH02167701A (en) * | 1988-12-21 | 1990-06-28 | Ngk Insulators Ltd | Manufacture of multi-branched ceramic pipe for thermally insulating exhaust channel |
-
1991
- 1991-03-30 JP JP3092698A patent/JP2578531B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6092807A (en) * | 1983-10-27 | 1985-05-24 | 株式会社長谷川工務店 | Formwork made of ceramic and manufacture thereof |
| JPS6112869A (en) * | 1984-06-15 | 1986-01-21 | ヘンケル・コーポレイション | Copper coating agent and method for irony surface |
| JPH0199803A (en) * | 1987-10-13 | 1989-04-18 | Ngk Insulators Ltd | Production of ceramics port liner |
| JPH01129948A (en) * | 1987-11-16 | 1989-05-23 | Murata Mfg Co Ltd | Low-shrinkage ceramics |
| JPH02167701A (en) * | 1988-12-21 | 1990-06-28 | Ngk Insulators Ltd | Manufacture of multi-branched ceramic pipe for thermally insulating exhaust channel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2578531B2 (en) | 1997-02-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19961001 |