JPH0133656B2 - - Google Patents
Info
- Publication number
- JPH0133656B2 JPH0133656B2 JP58154507A JP15450783A JPH0133656B2 JP H0133656 B2 JPH0133656 B2 JP H0133656B2 JP 58154507 A JP58154507 A JP 58154507A JP 15450783 A JP15450783 A JP 15450783A JP H0133656 B2 JPH0133656 B2 JP H0133656B2
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- cylinder
- cylindrical
- thermal expansion
- piston
- 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
Links
- 239000000919 ceramic Substances 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 21
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 13
- 229910052709 silver Inorganic materials 0.000 claims description 13
- 239000004332 silver Substances 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 11
- 238000005219 brazing Methods 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 5
- 230000008602 contraction Effects 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 22
- 229910052742 iron Inorganic materials 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000004512 die casting Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910017315 Mo—Cu Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- WUUZKBJEUBFVMV-UHFFFAOYSA-N copper molybdenum Chemical compound [Cu].[Mo] WUUZKBJEUBFVMV-UHFFFAOYSA-N 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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
- F02F3/00—Pistons
- F02F3/0015—Multi-part pistons
-
- 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
- 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
- F05C2201/00—Metals
- F05C2201/02—Light metals
- F05C2201/021—Aluminium
-
- 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
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
- F05C2201/0448—Steel
-
- 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
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
- F05C2201/0448—Steel
- F05C2201/046—Stainless steel or inox, e.g. 18-8
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はエンジンのピストン頭部をセラミツク
化したセラミツク組込型ピストンに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ceramic-integrated piston in which the piston head of an engine is made of ceramic.
［従来の技術］
セラミツク焼結体とアルミニウム合金製のピス
トン本体との結合の媒体として、その接合面にア
ルフイン処理など表面処理を施した鉄製たがを用
いたピストンが種々提案されている（例えば特開
昭57−2445）。[Prior Art] Various pistons have been proposed that use iron hoops with surface treatments such as Alphin treatment on their joint surfaces as a bonding medium between a ceramic sintered body and an aluminum alloy piston body (for example, Japanese Patent Publication No. 57-2445).
［発明が解決しようとする課題］
しかるに、かかるピストンは、アルフイン処理
など表面処理をしているため工程が複雑であり、
また、アルミニウムと鉄との熱膨張差により接合
面の剥離を遅延させる効果はあつても熱膨張差自
体を少なくする効果はないため確実に剥離を防ぐ
ことは困難であり、自動車エンジンのごとく、長
時間メンテナンスフリーで使用するのに必要な程
度の耐久性は得られていない。[Problems to be Solved by the Invention] However, such pistons require a complicated process because they are subjected to surface treatments such as Alphin treatment.
Furthermore, although the difference in thermal expansion between aluminum and iron may have the effect of delaying the separation of the bonded surfaces, it does not have the effect of reducing the difference in thermal expansion itself, so it is difficult to reliably prevent separation. The durability required for long-term maintenance-free use is not achieved.
本発明の目的は、製造工程の複雑化を伴わず、
ピストン本体と該本体の凹部に嵌め込まれるセラ
ミツク円柱体との結合を強固にできるとともに優
れた耐久性が得られるセラミツク組込型ピストン
の提供にある。 The purpose of the present invention is to avoid complicating the manufacturing process,
To provide a ceramic built-in type piston which can strengthen the connection between a piston body and a ceramic cylindrical body fitted into a recessed part of the body and can provide excellent durability.
［課題を解決するための手段］
上記目的を達成するため、本発明は、アルミニ
ウム合金製のピストン本体の頭部に形成された円
柱状の凹部内に、該凹部の中心に向かつて、鉄系
合金製の円筒外筒および円筒内筒、セラミツク円
柱体の順に、同軸的に嵌め込まれて結合されると
ともに熱膨張率が漸減するセラミツク組込型ピス
トンであり、前記セラミツク円柱体と円筒内筒と
の接合を、（あ）前記セラミツク円柱体に近似す
る熱膨張係数を有するガラス層を焼付け、該ガラ
ス層を介して円筒内筒を銀ろう付けするガラスコ
ーテイング銀ろう付け法か、（い）チタン・モリ
ブデン・銅合金をセラミツク円柱体表面に蒸着
し、還元ガス雰囲気炉中でセラミツク円柱体と円
筒内筒を銀ろう付けするPVD法か、（う）有機溶
剤にTiH2粉末を加え、ペースト化したものを前
記セラミツク円柱体面に塗布し、還元ガス雰囲気
炉中で銀ろう付けする活性化金属法か、（え）前
記セラミツク円柱体を冷却し、円筒内筒を加熱
し、熱膨張および収縮によつて両者を固着させる
焼きバメ法かのいずれかにより行う構成を採用し
た。[Means for Solving the Problems] In order to achieve the above object, the present invention provides an iron-based material in a cylindrical recess formed in the head of an aluminum alloy piston body toward the center of the recess. This is a ceramic-embedded piston in which an alloy cylindrical outer cylinder, a cylindrical inner cylinder, and a ceramic cylindrical body are coaxially fitted and connected in this order, and the coefficient of thermal expansion gradually decreases. (a) A glass coating silver brazing method in which a glass layer having a coefficient of thermal expansion similar to that of the ceramic cylinder is baked and the inner cylinder is soldered with silver through the glass layer, or (b) titanium.・PVD method in which a molybdenum-copper alloy is vapor-deposited on the surface of a ceramic cylinder, and the ceramic cylinder and inner cylinder are silver-brazed in a reducing gas atmosphere furnace, or (c) TiH 2 powder is added to an organic solvent to form a paste. Either the activated metal method involves coating the surface of the ceramic cylinder and silver brazing in a reducing gas atmosphere furnace, or (e) cooling the ceramic cylinder and heating the inner cylinder to prevent thermal expansion and contraction. Therefore, we adopted a configuration that uses either a shrink fit method to firmly fix the two.
［作用および発明の効果］
本発明のセラミツク組込型ピストンはつぎの作
用および効果を奏する。[Actions and Effects of the Invention] The ceramic built-in piston of the present invention has the following actions and effects.
(ア) セラミツク組込型ピストンは、アルミニウム
合金製のピストン本体の頭部に形成された円柱
状の凹部内に、凹部の中心に向かつて、鉄系合
金製の円筒外筒および円筒内筒、セラミツク円
柱体の順に、同軸的に嵌め込まれて結合される
とともに熱膨張率が漸減している（ピストン本
体と円筒外筒および円筒外筒と円筒内筒はそれ
ぞれ金属どうしであるので結合には問題がな
い）。(a) A ceramic built-in piston has a cylindrical outer cylinder and an inner cylindrical cylinder made of an iron alloy, placed in a cylindrical recess formed in the head of the piston body made of an aluminum alloy, toward the center of the recess. The ceramic cylindrical bodies are fitted coaxially and connected in order, and the coefficient of thermal expansion gradually decreases (the piston body and the outer cylinder, and the outer cylinder and the inner cylinder are each made of metal, so there is no problem in joining them) ).
このため、ピストン頭部が使用時に高温に晒
されてアルミニウム合金が径方向および軸方向
に膨張しても熱膨張率を鉄系合金製の円筒外筒
および円筒内筒、セラミツク円柱体の順に漸減
させ、さらにそれらが同軸的に嵌め込まれてい
るので熱膨張差による応力が吸収できる。よつ
て、ピストンは優れた耐久性を具有し、長時間
メンテナンスフリーで使用可能である。 Therefore, even if the piston head is exposed to high temperatures during use and the aluminum alloy expands in the radial and axial directions, the coefficient of thermal expansion gradually decreases in the order of the outer and inner cylinders made of iron-based alloy, and the ceramic cylinder body. Furthermore, since they are fitted coaxially, stress due to differences in thermal expansion can be absorbed. Therefore, the piston has excellent durability and can be used for a long time without maintenance.
(イ) セラミツク円柱体と円筒内筒との接合をガラ
スコーテイング銀ろう付け法か、PVD法か活
性化金属法か、焼きバメ法かのいずれかにより
行つている。このため、従来のように製造工程
が複雑にならない。(a) The ceramic cylindrical body and the cylindrical inner cylinder are joined by one of the glass coating silver brazing method, the PVD method, the activated metal method, or the shrink fitting method. Therefore, the manufacturing process does not become complicated as in the past.
［実施例］
つぎに本発明にかかるセラミツク組込型ピスト
ンの一実施例を第１図ないし第２図に基づき説明
する。[Embodiment] Next, an embodiment of the ceramic built-in piston according to the present invention will be described with reference to FIGS. 1 and 2.
セラミツク組込型ピストンは、頭部１１に断面
円状の底部１２を有する凹部１３が設けられたピ
ストン本体１と、前記凹部１３内に同軸的に嵌め
込まれるセラミツク円柱体２および鉄製たが３と
で構成される。また、セラミツク円柱体２および
鉄製たが３の先端面は前記頭部１１の端面と面一
となつている。 The ceramic built-in piston includes a piston body 1 having a head 11 provided with a recess 13 having a bottom portion 12 with a circular cross section, a ceramic cylindrical body 2 and an iron hoop 3 that are coaxially fitted into the recess 13. Consists of. Further, the end surfaces of the ceramic cylindrical body 2 and the iron hoop 3 are flush with the end surface of the head 11.
ピストン本体１はアルミダイキヤスト（熱膨張
係数；21×10-6／deg）で製造されている。 The piston body 1 is manufactured from aluminum die casting (thermal expansion coefficient: 21×10 −6 /deg).
セラミツク円柱体２は耐熱衝撃性の高い、ジル
コニアや窒化珪素などのセラミツク焼結体で形成
されている。 The ceramic cylinder body 2 is made of a ceramic sintered body such as zirconia or silicon nitride, which has high thermal shock resistance.
鉄製たが３は、円筒内筒３１をフエライト系ス
テンレス鋼やマルテンサイト系ステンレス鋼（熱
膨張係数；11〜13×10-6／deg）とし、円筒外筒
３２をニレジストやオーステナイト系ステンレス
鋼や球状黒鉛鋳鉄（熱膨張係数；19〜20×10-6／
deg）としている。 The iron hoop 3 has an inner cylinder 31 made of ferritic stainless steel or martensitic stainless steel (coefficient of thermal expansion: 11 to 13 × 10 -6 /deg), and an outer cylinder 32 made of Niresist, austenitic stainless steel, or Spheroidal graphite cast iron (coefficient of thermal expansion; 19-20×10 -6 /
degree).
つぎに、セラミツク組込型ピストンの製造方法
について説明する。 Next, a method for manufacturing a ceramic-embedded piston will be explained.
焼きバメ、ろう付け、一体的鋳造から選ばれ
るいずれかの手段で円筒外筒３２円筒内筒３１
とを接合して鉄製たが３を製造する。 The cylindrical outer cylinder 32 and the cylindrical inner cylinder 31 are assembled by any means selected from shrink fitting, brazing, and integral casting.
The iron hoop 3 is manufactured by joining the two.
続いて、つぎのいずれかの方法で鉄製たが３
とセラミツク円柱体２とを接合する。 Next, use one of the following methods to attach 3 iron hoops.
and the ceramic cylindrical body 2 are joined.
(カ) セラミツク円柱体２と円筒内筒３１との接
合を、セラミツク円柱体２に近似する熱膨張
係数を有するガラス層４を焼付け、該ガラス
層４を介して円筒内筒３１を銀ろう付けす
る。 (F) The ceramic cylinder body 2 and the cylindrical inner tube 31 are joined by baking a glass layer 4 having a coefficient of thermal expansion similar to that of the ceramic cylinder body 2, and silver brazing the cylinder inner tube 31 through the glass layer 4. do.
(キ) Ti（1000オングストローム）−Mo（1000オ
ングストローム）−Cu（2000オングストロー
ム）合金を、300℃、10-6Torrでセラミツク
円柱体２表面に蒸着し、水素炉中でセラミツ
ク円柱体２と円筒内筒３１とを銀ろう付けす
る。 (G) A Ti (1000 angstrom) - Mo (1000 angstrom) - Cu (2000 angstrom) alloy was deposited on the surface of the ceramic cylinder 2 at 300°C and 10 -6 Torr, and the ceramic cylinder 2 and the cylinder were heated in a hydrogen furnace. The inner cylinder 31 is soldered with silver.
(ク) 酢酸ブチルにTiH2粉末をを加えてペース
トとし、このペーストをセラミツク円柱体２
表面に塗布し、セラミツク円柱体２と円筒内
筒３１とを水素炉中で銀ろう付けする。 (H) Add TiH 2 powder to butyl acetate to make a paste, and apply this paste to the ceramic cylinder 2.
The ceramic cylinder 2 and the cylindrical inner cylinder 31 are silver-brazed in a hydrogen furnace.
(ケ) セラミツク円柱体２を−70℃前後に冷却
し、円筒内筒３１を600℃前後に加熱し、熱
膨張および収縮によつて両者を固着させる。 (k) The ceramic cylindrical body 2 is cooled to around -70°C, and the cylindrical inner tube 31 is heated to around 600°C, and the two are fixed together by thermal expansion and contraction.
さらに、セラミツク円柱体２に鉄製たが３が
外嵌された結合体５と、ピストン本体１との結
合を、鋳込み、圧入、焼きバメのいずれかによ
り行う。 Further, the joint body 5, in which the iron hoop 3 is fitted onto the ceramic cylinder body 2, is joined to the piston body 1 by any one of casting, press-fitting, and shrink fitting.
つぎに、セラミツク組込型ピストンの作用およ
び効果について説明する。 Next, the functions and effects of the ceramic built-in piston will be explained.
(か) まず、ピストン本体１と円筒外筒３２との
接合は、焼きバメ、ろう付け、一体的鋳造のい
ずれかで行われ円筒外筒３２と円筒内筒３１と
は鋳込み、圧入、焼きバメのいずれかで行われ
ている。これらの接合はそれぞれ金属どうしで
あるので問題がない。(i) First, the piston body 1 and the cylindrical outer cylinder 32 are joined by shrink fitting, brazing, or integral casting. It is done in either. Since these connections are made of metal, there is no problem.
つぎに、セラミツク組込型ピストンは、アル
ミダイキヤスト製のピストン本体１の頭部１１
に形成された円柱状の凹部１３内に、凹部１３
の中心に向かつて、ピストン本体１（熱膨張係
数；21×10-6／deg）、鉄系合金製の円筒外筒３
２（熱膨張係数；19〜20×10-6／deg）および
円筒内筒３１（熱膨張係数；11〜13×10-6／
deg）、セラミツク円柱体２（ジルコニア製で
熱膨張係数が9.5〜11×10-6／deg）の順に、同
軸的に嵌め込まれて結合されるとともに熱膨張
率を少しずつ低くなるようにしている。このた
め、頭部１１が使用時に高温（通常頭部１１で
200℃〜400℃）に晒されてアルミニウム合金が
径方向および軸方向に膨張しても、熱膨張率が
漸減することと、同軸的に嵌め込まれているこ
とにより、応力が吸収できる。よつて、セラミ
ツク組込型ピストンは優れた耐久性を具有し、
長時間メンテナンスフリーで使用可能となる。 Next, the ceramic built-in type piston has a head 11 of a piston body 1 made of aluminum die-casting.
In the columnar recess 13 formed in the recess 13
Toward the center of
2 (coefficient of thermal expansion; 19 to 20×10 -6 /deg) and inner cylinder 31 (coefficient of thermal expansion; 11 to 13×10 -6 /deg)
deg) and the ceramic cylinder body 2 (made of zirconia with a coefficient of thermal expansion of 9.5 to 11×10 -6 /deg) are coaxially fitted and bonded in this order, and the coefficient of thermal expansion is gradually lowered. . For this reason, the head 11 is at a high temperature during use (normally the head 11 is
Even if the aluminum alloy expands in the radial and axial directions when exposed to temperatures (200°C to 400°C), the stress can be absorbed due to the gradual decrease in the coefficient of thermal expansion and the coaxial fitting. Therefore, the ceramic built-in piston has excellent durability,
It can be used for a long time without maintenance.
(き) セラミツク円柱体２と円筒内筒３１との接
合を、ガラス層４を介して銀ろう付けする方法
（ガラスコーテイング銀ろう付け法）か、Ti−
Mo−Cu合金をセラミツク円柱体２表面に蒸着
し、水素炉中で銀ろう付けする方法（PVD法）
か、TiH2ペーストをセラミツク円柱体２表面
に塗布し水素炉中で銀ろう付けする方法（活性
化金属法）か、セラミツク円柱体２を冷却し、
円筒内筒３１を加熱し固着させる方法（焼きバ
メ法）のうちいずれかで行つている。このた
め、製造工程は単純である。(i) The ceramic cylindrical body 2 and the cylindrical inner tube 31 are joined by silver brazing through the glass layer 4 (glass coating silver brazing method), or by using Ti-
Method of vapor depositing Mo-Cu alloy on the surface of ceramic cylinder 2 and silver brazing in a hydrogen furnace (PVD method)
Alternatively, TiH 2 paste is applied to the surface of the ceramic cylinder 2 and silver brazed in a hydrogen furnace (activated metal method), or the ceramic cylinder 2 is cooled and
This is done by one of the methods of heating and fixing the inner cylinder 31 (shrink fitting method). Therefore, the manufacturing process is simple.
第１図は本発明にかかるセラミツク組込型ピス
トンの一実施例を示す断面図、第２図はそのＡ−
Ａ断面図である。
図中、１……アルミニウム合金製のピストン本
体、２……セラミツク円柱体、３……鉄製たが、
４……ガラス層、１１……頭部、１２……底部、
１３……凹部、３１……円筒内筒、３２……円筒
外筒。
FIG. 1 is a cross-sectional view showing one embodiment of a ceramic built-in piston according to the present invention, and FIG.
It is an A sectional view. In the figure, 1... piston body made of aluminum alloy, 2... ceramic cylindrical body, 3... iron hoop,
4... Glass layer, 11... Head, 12... Bottom,
13... recessed portion, 31... cylindrical inner cylinder, 32... cylindrical outer cylinder.
Claims (1)
形成された円柱状の凹部内に、 該凹部の中心に向かつて、鉄系合金製の円筒外
筒および円筒内筒、セラミツク円柱体の順に、同
軸的に嵌め込まれて結合されるとともに熱膨張率
が漸減するセラミツク組込型ピストンであり、 前記セラミツク円柱体と円筒内筒との接合を、 (あ) 前記セラミツク円柱体に近似する熱膨張係
数を有するガラス層を焼付け、該ガラス層を介
して円筒内筒を銀ろう付けするガラスコーテイ
ング銀ろう付け法か、 (い) チタン・モリブデン・銅合金をセラミツク
円柱体表面に蒸着し、還元ガス雰囲気炉中でセ
ラミツク円柱体と円筒内筒を銀ろう付けする
PVD法か、 (う) 有機溶剤にTiH2粉末を加え、ペースト化
したものを前記セラミツク円柱体表面に塗布
し、還元ガス雰囲気炉中で銀ろう付けする活性
化金属法か、 (え) 前記セラミツク円柱体を冷却し、円筒内筒
を加熱し、熱膨張および収縮によつて両者を固
着させる焼きバメ法か のいずれかにより行うことを特徴とするセラミツ
ク組込型ピストン。[Scope of Claims] 1. In a cylindrical recess formed in the head of a piston body made of an aluminum alloy, toward the center of the recess, an outer cylindrical cylinder and an inner cylindrical cylinder made of an iron alloy, and a ceramic cylinder. This is a ceramic-embedded piston whose coefficient of thermal expansion gradually decreases as it is coaxially fitted and connected in the order of the body, and the connection between the ceramic cylindrical body and the cylindrical inner cylinder is (a) approximated to the ceramic cylindrical body. Either the glass coating silver brazing method involves baking a glass layer with a thermal expansion coefficient of , Silver braze the ceramic cylinder and the inner cylinder in a reducing gas atmosphere furnace.
(c) PVD method, (c) Add TiH 2 powder to an organic solvent, make a paste, apply it to the surface of the ceramic cylinder, and silver braze in a reducing gas atmosphere furnace. (d) Activated metal method, as described above. A ceramic-embedded piston characterized in that the ceramic cylinder is cooled, the cylindrical inner cylinder is heated, and the shrink fitting method is used to fix the two through thermal expansion and contraction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15450783A JPS6045759A (en) | 1983-08-23 | 1983-08-23 | Ceramic built-in type piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15450783A JPS6045759A (en) | 1983-08-23 | 1983-08-23 | Ceramic built-in type piston |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6045759A JPS6045759A (en) | 1985-03-12 |
| JPH0133656B2 true JPH0133656B2 (en) | 1989-07-14 |
Family
ID=15585754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15450783A Granted JPS6045759A (en) | 1983-08-23 | 1983-08-23 | Ceramic built-in type piston |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6045759A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8882561B2 (en) | 2006-04-07 | 2014-11-11 | Mattel, Inc. | Multifunction removable memory device with ornamental housing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5617705A (en) * | 1979-07-17 | 1981-02-19 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| JPS5688933A (en) * | 1979-12-19 | 1981-07-18 | Toyota Motor Corp | Piston head part structure |
| JPS572445A (en) * | 1980-06-06 | 1982-01-07 | Aisin Seiki Co Ltd | Manufacture of ceramic incorporated type engine piston |
-
1983
- 1983-08-23 JP JP15450783A patent/JPS6045759A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5617705A (en) * | 1979-07-17 | 1981-02-19 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| JPS5688933A (en) * | 1979-12-19 | 1981-07-18 | Toyota Motor Corp | Piston head part structure |
| JPS572445A (en) * | 1980-06-06 | 1982-01-07 | Aisin Seiki Co Ltd | Manufacture of ceramic incorporated type engine piston |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8882561B2 (en) | 2006-04-07 | 2014-11-11 | Mattel, Inc. | Multifunction removable memory device with ornamental housing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6045759A (en) | 1985-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0516382B2 (en) | ||
| US4335998A (en) | Ceramic-metal assembly | |
| JPH0131030B2 (en) | ||
| US4709621A (en) | Internal combustion engine piston and a method of producing the same | |
| JPS6335464A (en) | Method of joining different thermal expansion members | |
| JPH0133656B2 (en) | ||
| JPS63231928A (en) | Bonding body | |
| JPS6045757A (en) | Ceramic built-in type piston | |
| JPS6045758A (en) | Ceramic built-in type piston | |
| JPH0240031B2 (en) | ||
| JPS6132082Y2 (en) | ||
| JPH0434258A (en) | Manufacture of cam shaft | |
| JPS6229606Y2 (en) | ||
| JPH0426424Y2 (en) | ||
| JPS6229610Y2 (en) | ||
| JPH0410198Y2 (en) | ||
| JPH0350103B2 (en) | ||
| JPS63962Y2 (en) | ||
| JPH0517001Y2 (en) | ||
| JPH0371391B2 (en) | ||
| JPH0660065B2 (en) | Engine parts | |
| JPH0633725B2 (en) | Engine parts and manufacturing method thereof | |
| JPS59224445A (en) | Piston | |
| JPS61219766A (en) | Joint structure of ceramic shaft and metal shaft | |
| JPH0519777Y2 (en) |