JPS61154758A - Binding method of ceramic structural body and metallic structural body - Google Patents

Binding method of ceramic structural body and metallic structural body

Info

Publication number
JPS61154758A
JPS61154758A JP27818084A JP27818084A JPS61154758A JP S61154758 A JPS61154758 A JP S61154758A JP 27818084 A JP27818084 A JP 27818084A JP 27818084 A JP27818084 A JP 27818084A JP S61154758 A JPS61154758 A JP S61154758A
Authority
JP
Japan
Prior art keywords
ceramic
structural body
piston
ceramic fiber
molded body
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
Application number
JP27818084A
Other languages
Japanese (ja)
Inventor
Akira Ibuki
伊吹　明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Isuzu Motors Ltd
Original Assignee
Isuzu Motors Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Isuzu Motors Ltd filed Critical Isuzu Motors Ltd
Priority to JP27818084A priority Critical patent/JPS61154758A/en
Publication of JPS61154758A publication Critical patent/JPS61154758A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0085—Materials for constructing engines or their parts
    • F02F7/0087—Ceramic materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/16—Fibres

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Ceramic Products (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Abstract

PURPOSE:To bind a ceramic structual body and metallic structural body in a manner as to obtain high mechanical binding strength by assembling a ceramic fiber molding to the surface of the ceramic structural body, setting the assembly in a casting mold, subjecting the metallic structural body to insert casting and packing a molten metal into the gaps of the molding. CONSTITUTION:A piston crown part 2 as the ceramic structural body and a piston body 4 as the metallic structural body are bound by the following method: Legs 6 projected from the bottom surface of the part 2 are inserted into slits 8 of the ceramic fiber molding 3a. A pin 5 is inserted into holes 7 provided to the legs 6 to bind the part 2 and the molding 3a. The piston body 4 is insert- cast to the one side of such molding 3a by which the crown part 2 and the body 4 are bound.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明はセラミックス構造体と金属構造体との結合方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of joining a ceramic structure and a metal structure.

［従来の技術］ セラミックスのもつ耐熱性に看目し、これを金属構造体
の表面に結合することにより金属構造体の熱負荷を軽減
しようとする試みは、例えば内燃ｔＩＡ関の燃焼室を区
画する壁部に応用されている。[Prior Art] In view of the heat resistance of ceramics, attempts have been made to reduce the heat load on the metal structure by bonding it to the surface of the metal structure. It is applied to walls where

一般に、セラミックスと金属とは熱膨張率が著しく異な
るため、単に鋳ぐるむなどの手段でセラミックスと金属
とを直接粘合するだけでは、その結合強度が弱く、熱膨
張率の通いから高温の使用環境では熱応力により破損に
至る。In general, ceramics and metals have significantly different coefficients of thermal expansion. Therefore, simply bonding ceramics and metals directly by casting or other methods will result in weak bond strength, and the use of high temperatures due to the difference in thermal expansion coefficients. In the environment, thermal stress can lead to failure.

特に、繰り返し荷重を受ける内燃機関のピストンなどで
は、より確実な結合手段が要求される。In particular, more reliable coupling means are required for internal combustion engine pistons that are subject to repeated loads.

このため、例えば実開昭５９−６５９６０号公報に開示
されるように、セラミックスからなるピストン冠部と金
属からなるピストン本体との間に、重ね合せ部と嵌合部
を備え、この嵌合部を金属の熱膨張による応力から保護
するために、保護リングをピストン冠部のボス部に対し
て隙間を存して支持したうえ、このピストン冠部にピス
トン本体を鋳くんだものが提案されている。For this reason, for example, as disclosed in Japanese Utility Model Application Publication No. 59-65960, an overlapping part and a fitting part are provided between the piston crown made of ceramic and the piston body made of metal, and this fitting part is provided. In order to protect the piston from stress due to thermal expansion of the metal, it has been proposed that a protective ring is supported with a gap between the boss of the piston crown and that the piston body is cast into the piston crown. There is.

この従来技術では、保護リングとピストン冠部のボス部
とを貫通するビンにより、ピストン冠部とピストン本体
との重ね合せ結合部の剥離が阻止される。このピンはピ
ストン冠部とピストン本体との内部に挿通支持されるの
で、この部分での熱膨張による応力を考慮しなければな
らない。また、金属リングとボス部との間に隙間を備え
るためには、量産上その鋳造方法に何らかの対策を講じ
なければならないなど残された問題の解決が期待される
。In this prior art, the pin that passes through the protective ring and the boss of the piston crown prevents the overlapping joint between the piston crown and the piston body from peeling off. Since this pin is inserted and supported inside the piston crown and the piston body, stress due to thermal expansion in this portion must be taken into consideration. In addition, it is expected that the remaining problems such as the need to take some measures in the casting method for mass production in order to provide a gap between the metal ring and the boss portion are expected to be solved.

［発明が解決しようとする開題点］ 本発明の目的は、従来例とは異なり、熱膨張の興なるセ
ラミックス構造体と金属構造体との重ね合せ結合部につ
いて、熱応力が緩和されるとともに高い機械的結合強度
が得られるセラミックス構造体と金属構造体との結合方
法を提供することにある。[Problem to be Solved by the Invention] The purpose of the present invention, unlike the conventional examples, is to alleviate thermal stress and to reduce thermal stress at the overlapping joint between a ceramic structure and a metal structure where thermal expansion occurs. An object of the present invention is to provide a method for bonding a ceramic structure and a metal structure that provides mechanical bonding strength.

［問題点を解決するための手段］ 上記目的を達成するために、本発明の方法はセラミック
ス繊維成形体をセラミックス構造体の表面に組み付けて
鋳型にセットし、金属構造体を鋳ぐるむと同時に、前記
セラミックス繊維成形体の空隙に溶融金属を充填させる
ものである。[Means for Solving the Problems] In order to achieve the above object, the method of the present invention involves assembling a ceramic fiber molded body onto the surface of a ceramic structure, setting it in a mold, casting the metal structure, and at the same time, The voids in the ceramic fiber molded body are filled with molten metal.

セラミックス構造体を成形する場合に、金属構造体と対
向する面にセラミックス繊維成形体が組み付けられる。When molding a ceramic structure, a ceramic fiber molded body is assembled on the surface facing the metal structure.

セラミックス構造体にセラミックス繊維成形体を組み合
わせた成形体を鋳型の内部にセットし、金属構造体を溶
湯鍛造、真空溶浸などの方法により、時間を掛けかつ加
圧しながら鋳くるむ。これにより、鋳くるむ時に熱膨張
率の差に起因するセラミックス構造体の熱破損を防止す
ることができる。金属構造体を鋳くるむ時に溶融金属が
セラミックス繊維成形体の空隙へ滲みこんで充填され、
Ｆ　ＲＭ　（ｆｉｂｒｅ　ｒｅｉｎｆｏｒｃｅｄ　ｍｅ
ｔａｌ　）　　、屠体が形成ざる。A molded body that combines a ceramic structure and a ceramic fiber molded body is set inside a mold, and a metal structure is cast over time and under pressure using methods such as molten metal forging and vacuum infiltration. Thereby, it is possible to prevent thermal damage to the ceramic structure due to a difference in coefficient of thermal expansion during casting. When the metal structure is cast, molten metal seeps into the voids of the ceramic fiber molded body and fills it.
FRM (fiber reinforced me)
tal), the carcass is formed.

セラミックス繊維成形体は、ウィスカと称するＳｉ　Ｃ
，Ｓｉ　３　ＮａなどのセラミックスｌＩ維（直径数μ
ｍ、長さ数１００μｍ）を複雑に絡み合わせたものであ
って、成形型の内部に充填した蒸発性の溶液にウィスカ
を浸漬し、これを引き上げて乾燥すれば多孔質のセラミ
ックス繊維成形体が成形される。The ceramic fiber molded body is made of SiC called whiskers.
, Si 3 Na and other ceramic lI fibers (several microns in diameter)
The whiskers are immersed in an evaporative solution filled inside a mold, pulled up and dried to form a porous ceramic fiber molded body. molded.

ＦＲＭ層体屠体ラミックス繊維の含有率Ｖｔが高いほど
セラミックスの性質すなわちセラミックスの熱膨張率に
近づく。そこで、セラミックス構造体と金属構造体との
間に形成されるＦＲＭ層体屠体セラミックス構造体と対
向する面ではセラミックス繊維の含有率Ｖｆが多く、逆
に金属構造体と対向する面ではより長い繊維を配分する
などしてセラミックス繊維の含有率Ｖｆが少なくなるよ
うにセラミックス繊維成形体３ａが予め成形される。The higher the content Vt of carcass ramix fibers in the FRM layer body, the closer it approaches the properties of ceramics, that is, the coefficient of thermal expansion of ceramics. Therefore, the ceramic fiber content Vf is higher on the surface facing the FRM layer carcass ceramic structure formed between the ceramic structure and the metal structure, and conversely, it is longer on the surface facing the metal structure. The ceramic fiber molded body 3a is formed in advance by distributing the fibers so that the ceramic fiber content Vf is reduced.

本発明は単にセラミックス構造体と金属構造体との重ね
合せ結合部に限らず、セラミックス構造体と金属構造体
との嵌合による結合部にも適用することができる。The present invention is not limited to simply overlapping joints between a ceramic structure and a metal structure, but can also be applied to a joint between a ceramic structure and a metal structure by fitting.

［作用］ セラミックス構造体と金属構造体との間に形成されるＦ
ＲＭ層体層線３ラミックスに近似する性質と金属に近似
する性質とを兼ね備えているので、セラミックス構造体
と金属構造体との機械的結合度が高く、結合部に熱応力
が発生しない構造物が得られる。[Function] F formed between the ceramic structure and the metal structure
RM Layer Layer 3 Since it has properties similar to Lamix and properties similar to metal, the degree of mechanical bonding between the ceramic structure and metal structure is high, and the structure does not generate thermal stress at the bonded part. You can get things.

［発明の実施例］ 本発明を実施例に基づいて説明する。第１図はセラミッ
クス構造体としてのピストン冠部２と金属構造体である
ピストン本体４との結合部についての実施例を示す。ピ
ストン冠部２の下面から突出された一片６がセラミック
ス繊維成形体３ａのスリット８に挿通され、かつ脚片６
に設けた穴７にピン５を挿通してピストン冠部２とセラ
ミックス繊維成形体３ａが結合される。このセラミック
ス繊維成形体３ａの片側にピストン本体４が鋳くるんで
結合される。[Examples of the Invention] The present invention will be described based on Examples. FIG. 1 shows an embodiment of a joint between a piston crown 2 as a ceramic structure and a piston body 4 as a metal structure. A piece 6 protruding from the lower surface of the piston crown 2 is inserted into a slit 8 of the ceramic fiber molded body 3a, and the leg piece 6
The piston crown 2 and the ceramic fiber molded body 3a are joined by inserting the pin 5 into the hole 7 provided in the piston. A piston body 4 is connected to one side of the ceramic fiber molded body 3a by a casting.

第２図に示すように、ピストン冠部２は円板の下面にピ
ン穴７を有する１対の脚片６を一体にセラミックスをも
って成形される。セラミックス繊維成形体３ａはセラミ
ックス短繊維を必要により少量の結合剤を混入したうえ
互いに絡ませて成形した円板であり、これに−片６が係
合する１対の長方形のスリット８が成形される。そして
、好ましくはセラミックス繊維成形体３ａの上面はセラ
ミックス繊維の含有率Ｖｆが高く、下面はセラミックス
繊維の密度が低くなるように成形される。As shown in FIG. 2, the piston crown 2 is integrally molded of ceramic with a pair of legs 6 having pin holes 7 on the lower surface of a disc. The ceramic fiber molded body 3a is a disk formed by mixing short ceramic fibers with a small amount of binder if necessary and intertwining them with each other, and a pair of rectangular slits 8 into which the pieces 6 engage are formed. . Preferably, the ceramic fiber molded body 3a is molded so that the ceramic fiber content Vf is high on the upper surface, and the ceramic fiber density is low on the lower surface.

このセラミックス繊維成形体３ａを予め成形したピスト
ン冠部２の下面に重ね合わせてビン５を脚片６の穴７に
挿通した侵に、鋳型の内部にセットし、アルミニウムな
どの溶融金属を加圧しながら注入し、ピストン本体４を
鋳くるむことによって、第１図に示すピストン１０が完
成される。この時、溶融金属がセラミックス繊維成形体
３ａの空隙へ充填され、ＦＲＭ層体屠体形成さる。This ceramic fiber molded body 3a is superimposed on the lower surface of the pre-formed piston crown 2, the bottle 5 is inserted into the hole 7 of the leg piece 6, and set inside the mold, and molten metal such as aluminum is pressurized. The piston 10 shown in FIG. 1 is completed by casting the piston body 4 and encasing the piston body 4. At this time, the molten metal is filled into the voids of the ceramic fiber molded body 3a, thereby forming the FRM layered body carcass.

ＦＲＭ層休３体下面はセラミックス繊維の含有率Ｖｆが
少なくなっているので、金属に近い性質を有し、ピスト
ン本体４とのなじみが良く、鋳ぐるみによって高い結合
強度が得られる。なお、ビン５はセラミックス繊維成形
体３ａと同質の材料またはピストン本体４と同質のセラ
ミックス材料で構成されることが好ましい。Since the lower surface of the FRM layered body has a low ceramic fiber content Vf, it has properties close to metal, fits well with the piston body 4, and high bonding strength can be obtained by casting. The bottle 5 is preferably made of the same material as the ceramic fiber molded body 3a or the same ceramic material as the piston body 4.

第４図はセラミックス構造体としてのシリンダライナ２
２と、金属構造体としてのシリンダ本体２４との結合構
造を示す。予め円筒形に成形したセラミックス繊維成形
体の内面に、セラミックスからなるシリンダライナ２２
を嵌合し、これを鋳型の内部にセットし、この外側に溶
融金属を注入してシリンダ本体２４を鋳ぐるむ。この時
、ＦＲＭ層体屠体が形成され、この外周面側はセラミッ
クス繊維の含有率ｖｆが少なくなっているので、その金
属的性質からシリンダ本体２４との高い結合強度が得ら
れる。Figure 4 shows cylinder liner 2 as a ceramic structure.
2 and a cylinder body 24 as a metal structure. A cylinder liner 22 made of ceramic is placed on the inner surface of the ceramic fiber molded body that has been previously formed into a cylindrical shape.
are fitted and set inside a mold, and molten metal is poured into the outside of the mold to form the cylinder body 24. At this time, an FRM layer carcass is formed, and since the ceramic fiber content vf is low on the outer peripheral surface side, high bonding strength with the cylinder body 24 can be obtained due to its metallic properties.

［発明の効果］ 本発明は上述のように、セラミックスに似た性質を持つ
面と金属に似た性質を持つ面とを兼ね備えるＦＲＭ層体
屠体中間材として、この片面にセラミックス構造体を、
他面に金属構造体をそれぞれ結合するものであるから、
結合強度が非常に高く、かつそれぞれの結合面における
熱膨張率の差が小さいので、熱応力の発生を抑えること
ができ、高い機械的強度が得られる。そして、セラミッ
クス繊維成形体３ａを予備成形し、これをセラミックス
構造体に組み付ける工程が加わるだけで、金属構造体を
この鋳造時セラミックス繊維成形体３ａに結合するもの
であるから、低コストで容易に製造することができる。[Effects of the Invention] As described above, the present invention is an FRM layered carcass intermediate material that has both a surface with properties similar to ceramics and a surface with properties similar to metal.
Since the metal structure is connected to the other side,
Since the bonding strength is very high and the difference in coefficient of thermal expansion between the respective bonding surfaces is small, generation of thermal stress can be suppressed and high mechanical strength can be obtained. The metal structure can be easily bonded to the ceramic fiber molded body 3a at low cost by simply adding the steps of preforming the ceramic fiber molded body 3a and assembling it to the ceramic structure. can be manufactured.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明に係る断熱ピストンにおけるセラミック
ス構造体と金属構造体との結合方法を説明する正面断面
図、第２図は同断熱ピストンにおけるピストン冠部の斜
視図、第３図はセラミックス繊維成形体の斜視図、第４
図は断熱シリンダにおけるセラミックス構造体と金属構
造体との結合方法を説明する正面断面図、第５図は同セ
ラミックス構造体と金属構造体との結合方法における中
間成形体を示す斜視図である。 ２：ピストン冠部（セラミックス構造体）　３゜２３　
：　ＦＲＭ層体屠体ａ：セラミックス繊維成形体　４：
ピストン本体（金属構造体）　２２ニジリンダライナ（
セラミックス構造体）　２４ニジリンダ本体（金属構造
体）Fig. 1 is a front cross-sectional view illustrating a method of joining a ceramic structure and a metal structure in an insulated piston according to the present invention, Fig. 2 is a perspective view of a piston crown in the insulated piston, and Fig. 3 is a ceramic fiber Perspective view of molded body, 4th
The figure is a front sectional view illustrating the method of joining the ceramic structure and the metal structure in the heat insulating cylinder, and FIG. 5 is a perspective view showing an intermediate molded body in the method of joining the ceramic structure and the metal structure. 2: Piston crown (ceramic structure) 3゜23
: FRM layer body carcass a: Ceramic fiber molded body 4:
Piston body (metal structure) 22 cylinder liner (
Ceramic structure) 24 Nijilinda body (metal structure)

Claims (1)

【特許請求の範囲】[Claims] セラミックス繊維成形体をセラミックス構造体の表面に
組み付けて鋳型にセットし、金属構造体を鋳ぐるむと同
時に、前記セラミックス繊維成形体の空隙に溶融金属を
充填させることを特徴とするセラミックス構造体と金属
構造体との結合方法。A ceramic structure and a metal, characterized in that a ceramic fiber molded body is assembled on the surface of the ceramic structure and set in a mold, and at the same time as the metal structure is cast, the voids of the ceramic fiber molded body are filled with molten metal. How to connect to a structure.
JP27818084A 1984-12-27 1984-12-27 Binding method of ceramic structural body and metallic structural body Pending JPS61154758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27818084A JPS61154758A (en) 1984-12-27 1984-12-27 Binding method of ceramic structural body and metallic structural body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27818084A JPS61154758A (en) 1984-12-27 1984-12-27 Binding method of ceramic structural body and metallic structural body

Publications (1)

Publication Number Publication Date
JPS61154758A true JPS61154758A (en) 1986-07-14

Family

ID=17593699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27818084A Pending JPS61154758A (en) 1984-12-27 1984-12-27 Binding method of ceramic structural body and metallic structural body

Country Status (1)

Country Link
JP (1) JPS61154758A (en)

Similar Documents

Publication Publication Date Title
KR950014411B1 (en) The manufacture of pistons
JPH07189805A (en) Light metal piston with combustion recess and manufacture of said piston
JPS61154758A (en) Binding method of ceramic structural body and metallic structural body
CA1333843C (en) Evaporable foam pattern for use in a casting process and having load transfer walls
JPH0129979B2 (en)
JPS58180751A (en) Internal-combustion engine piston and its manufacturing
GB2173570A (en) Fibre-reinforced metal pistons
JPH02104950A (en) Piston for internal combustion engine
EP0280480A3 (en) Ceramic wall structures for engines and method of manufacture
JP2560402B2 (en) Internal combustion engine pistons
JP3074775B2 (en) Bonding structure of ceramic and metal and bonding method
JP3178627B2 (en) Preform joining method
JPH085726B2 (en) Combined body of ceramic body and metal body
JPS638273A (en) Method of joining ceramic member to metal member
JPS60190616A (en) Precombustion chamber inserting member for engine and manufacturing method thereof
JPS5848327Y2 (en) Structure of ceramic-metal composite
JPH0154540B2 (en)
JPS58197454A (en) Piston crown
JP2529729Y2 (en) Evanescent model for casting
JPS6142467A (en) Production of auxiliary combustion chamber for diesel engine
JPS5849161Y2 (en) molding mold
JPS61207860A (en) Cylinder liner
JP2581857B2 (en) Ceramic metal composite piston and method of manufacturing the same
JPH0199767A (en) Complex of ceramic and metal and its manufacture
JPH01278950A (en) Production of cam shaft