JPH01130865A - Heat resistant piston - Google Patents
Heat resistant pistonInfo
- Publication number
- JPH01130865A JPH01130865A JP62288145A JP28814587A JPH01130865A JP H01130865 A JPH01130865 A JP H01130865A JP 62288145 A JP62288145 A JP 62288145A JP 28814587 A JP28814587 A JP 28814587A JP H01130865 A JPH01130865 A JP H01130865A
- Authority
- JP
- Japan
- Prior art keywords
- piston
- ring carrier
- aluminum
- aluminum alloy
- ring
- 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
Links
- 239000000463 material Substances 0.000 claims abstract description 34
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 17
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910000679 solder Inorganic materials 0.000 claims abstract description 8
- 239000010953 base metal Substances 0.000 claims abstract description 6
- 238000005266 casting Methods 0.000 claims description 13
- 238000007747 plating Methods 0.000 claims description 7
- 238000005304 joining Methods 0.000 abstract description 5
- 230000005496 eutectics Effects 0.000 abstract description 4
- VRAIHTAYLFXSJJ-UHFFFAOYSA-N alumane Chemical compound [AlH3].[AlH3] VRAIHTAYLFXSJJ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract description 2
- 238000005476 soldering Methods 0.000 abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は、たとえば運転中に過大な熱負荷を受ける部分
を改良して熱に対する特性を向上させた耐熱ピストンに
関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a heat-resistant piston whose characteristics against heat are improved by improving, for example, a portion that receives an excessive heat load during operation.
（従来の技術）
一般に、車両用のガソリンジンやディーゼルエンジンな
どに用いられるピストンには軽量で慣性力の小さいアル
ミ合金鋳物か多く採用されている。このアルミ合金鋳物
は、軽量であるということの他にも、ダイカスト鋳造、
溶湯鍛造法、低圧鋳造法等、高生産性という大きなメリ
ットを何している反面１強度、耐熱性、耐摩耗性等が鉄
系鋳物よりも劣るため、その適用には限界がある。(Prior Art) In general, pistons used in gasoline engines and diesel engines for vehicles are often made of aluminum alloy castings, which are lightweight and have low inertia. In addition to being lightweight, this aluminum alloy casting is die-casting,
Molten metal forging, low-pressure casting, and other methods have the great advantage of high productivity, but on the other hand, their application is limited because their strength, heat resistance, wear resistance, etc. are inferior to iron-based castings.
また、運転時におけるピストンの温度分布は一定ではな
く１例えば燃焼ガスに直接触れるピストンヘッドや、シ
リンダ壁を摺動する圧縮リングやオイルリングなどの各
種のピストンリングを嵌着するピストンリング用リング
キャリアなどは特に高温となる。したがって、上記リン
グキャリアなどを耐熱性等に優れた高強度材料で形成し
、他の部分を１通常の鋳造性、切削性の良いアルミ合金
を母材として鋳ぐるんでリングキャリアとピストン本体
とを接合する鋳ぐるみ法が行われる。この場合上記ピス
トン本体は母材によって形成される。In addition, the temperature distribution of the piston during operation is not constant; for example, the piston head that comes into direct contact with combustion gas, and the ring carrier for piston rings that fit various piston rings such as compression rings and oil rings that slide on the cylinder wall. etc., become particularly hot. Therefore, the ring carrier and other parts are made of a high-strength material with excellent heat resistance, etc., and the other parts are cast using a base material of aluminum alloy, which has good castability and machinability, to connect the ring carrier and the piston body. The casting method is used to join. In this case, the piston body is formed from a base material.
そして、上記高強度材料として鉄系材料を用いることが
考えられるが、鉄−アルミ鋳ぐるみの場合は、波涛ぐる
み材と母材との境界で充分な拡散接合を行なうための処
理が複雑であり、また重量増やコスト高を伴う。そこで
、近年は上記高強度材料として耐摩耗性１強度面で鉄系
材料をしのぐ特殊な特性を有するアルミ系材料が用いら
れる。しかし、このようなアルミ系材料を用いてアルミ
−アルミ鋳ぐるみを単純に行なった場合、波涛ぐるみ材
と母材との境界に酸化被膜層などが生じていた。このた
め鋳ぐるまれるリングキャリアと母材との境界に未溶岩
部が残って接合性が悪かった。It is conceivable to use iron-based materials as the above-mentioned high-strength material, but in the case of iron-aluminum castings, the process to perform sufficient diffusion bonding at the boundary between the wave-filled material and the base material is complicated. , which also increases weight and cost. Therefore, in recent years, aluminum-based materials have been used as the above-mentioned high-strength materials, which have special characteristics that exceed iron-based materials in terms of wear resistance and strength. However, when aluminum-aluminum casting is simply performed using such aluminum-based materials, an oxide film layer or the like is formed at the boundary between the wave-filled material and the base material. As a result, unmolten rock remained at the boundary between the ring carrier to be cast and the base metal, resulting in poor bonding properties.
（発明が解決しようとする問題点）
上述のように、互いにアルミ合金よりなるリングキャリ
アと母材、とを鋳ぐるみ法により接合する場合、従来は
接合性が悪いという問題があった。(Problems to be Solved by the Invention) As described above, when a ring carrier and a base material made of an aluminum alloy are joined together by a casting method, there has conventionally been a problem of poor joining performance.
本発明の目的とするところは、リングキャリアと母材と
の接合性がよく、さらに製造が容易な耐熱ピストンを提
供することにある。An object of the present invention is to provide a heat-resistant piston that has good bondability between a ring carrier and a base material and is easy to manufacture.
〔発明の構成〕
（問題点を解決するための手段及び作用）上記目的を達
成するために本発明は、耐熱性。[Structure of the Invention] (Means and effects for solving the problems) In order to achieve the above object, the present invention provides heat resistance.
ｒｊＪ ｔ’！−耗性に優れた特殊アルミ合金からなる
ピストンリン・グ用すングキャリア鋳ぐるみ接合側に超
音波アルミはんだめっきを施し、このピストンヘッド材
を金型内にセットした後、上記金型内に母材を注湯して
上記リングキャリアと上記母材とを一体としたことにあ
る。そして、上記超音波アルミはんだめっきが溶融する
ことによりリングキャリアと母材との間で充分な拡散接
合が行われるようにしたことにある。rjJ t'! - After applying ultrasonic aluminum solder plating to the joint side of the piston ring ring carrier casting, which is made of a special aluminum alloy with excellent wear resistance, and setting this piston head material in the mold, The ring carrier and the base material are integrated by pouring the base material. Further, by melting the ultrasonic aluminum solder plating, sufficient diffusion bonding is performed between the ring carrier and the base material.
こうすることによって本発明は、リングキャリアと母材
との互いの接合性を良くシ１品質を向上させることがで
きるようにすることにある。By doing so, the present invention aims to improve the mutual bondability between the ring carrier and the base material and improve the quality of the ring carrier.
（実施例） 以下２本発明の一実施例を図面に基づいて説明する。(Example) Hereinafter, two embodiments of the present invention will be described based on the drawings.
第１図は鋳ぐるみ装置を示すもので、１はピストン成型
のための金型であり、ｌａはキャビティである。そして
、金型１内には特殊アルミ合金を環状に成型してなるリ
ングキャリア２をセットする。上記特殊アルミ合金は通
常のアルミ合金に比べ附熱性、耐摩耗が優れたものであ
り１組成としては例えば、 Ｎｉ ： １０−２５９
６． Ｃｕ ： ０． ５ノ
〜５９６．そして残部をＡＹとしたもの、あるいは。FIG. 1 shows a casting device, where 1 is a mold for molding a piston, and la is a cavity. Then, a ring carrier 2 made of a special aluminum alloy molded into an annular shape is set in the mold 1. The above-mentioned special aluminum alloy has superior heat resistance and wear resistance compared to ordinary aluminum alloys, and its composition is, for example, Ni: 10-259.
6. Cu: 0. 5-596. And the remainder is AY, or.
Ｎ ｒ ： １０〜２５％、Ｃｕ ： ０．５〜５％の
他に。In addition to Nr: 10-25%, Cu: 0.5-5%.
Ｓｉ：１２％以下、Ｍｇ二１．０９６以下、Ｔｉ：０．
５％、Ｚｒ：０．５％以下のうち１種または２種以上を
含み、そして残部をＡＶとしたものなどが考えられる。Si: 12% or less, Mg2: 1.096 or less, Ti: 0.
5%, Zr: 0.5% or less, and the remainder is AV.
また、このピストンヘッド材２の鋳ぐるみ接合側部３に
は超音波アルミはんだめっきが施されており、これによ
って共晶層（図示しない）が形成されている。上記超音
波アルミはんだめっきは。Further, the cast-in joint side portion 3 of the piston head material 2 is subjected to ultrasonic aluminum solder plating, thereby forming a eutectic layer (not shown). The above is ultrasonic aluminum solder plating.
波涛ぐるみ材表面の酸化被膜層を取除き、アルミ−アル
ミはんだの共晶層を形成する。この共晶層は低融点で鋳
ぐるみアルミ溶湯で容易に溶融一体色するものである（
特願昭５９−２３４５９５）。The oxide film layer on the surface of the wave-covered material is removed, and a eutectic layer of aluminum-aluminum solder is formed. This eutectic layer has a low melting point and easily melts into a solid color with cast aluminum molten metal (
Patent application No. 59-234595).
そして、注湯口４から矢印Ｂで示すように溶融した母材
としてのＡＣ８Ａのアルミニウム合金を注湯する。この
ＡＣ８Ａは冷却凝固後にピストン本体５ａを形成するも
のである。このようにして第２図に示′す耐熱ピストン
５が形成される。このとき、上記リングキャリア２の接
合側部３に超音波アルミはんだめっきを施していること
から、リングキャリア２とＡＣ８Ａとの境界において充
分な拡散接合が行われる。ここで、第２図に示すのは耐
熱ピストン５の完成後、リングキャリア２にピストンリ
ング６を嵌着した状態である。なお。Then, as shown by arrow B, molten aluminum alloy of AC8A as a base material is poured from the pouring port 4. This AC8A forms the piston body 5a after being cooled and solidified. In this way, the heat-resistant piston 5 shown in FIG. 2 is formed. At this time, since the bonding side 3 of the ring carrier 2 is subjected to ultrasonic aluminum solder plating, sufficient diffusion bonding is performed at the boundary between the ring carrier 2 and the AC8A. Here, FIG. 2 shows a state in which the piston ring 6 is fitted into the ring carrier 2 after the heat-resistant piston 5 is completed. In addition.
鋳ぐるまれるリングキャリアの数は第１図に示すように
１個でもよく、あるいは複数個でもよい。The number of ring carriers to be cast may be one, as shown in FIG. 1, or a plurality of ring carriers.
また、第１図に示すように高強度材料、たとえば急冷凝
固粉末アルミ合金などで形成したピストンヘッド材７を
同時に鋳ぐるむことも可能である。Further, as shown in FIG. 1, it is also possible to simultaneously cast a piston head material 7 made of a high-strength material, such as a rapidly solidified powder aluminum alloy.
このような耐熱ピストン５はリングキャリア２とピスト
ン本体５ａとの境界において充分な拡散接合が行われる
ため接合性が良い。従って、境界部の接合が強固となり
、これによって耐熱ピストン５の耐久性が向上し、ひい
ては品質の向上が図れる。さらに、過大な熱負荷にも対
応できるようになる。Such a heat-resistant piston 5 has good bonding properties because sufficient diffusion bonding is performed at the boundary between the ring carrier 2 and the piston body 5a. Therefore, the bonding at the boundary becomes strong, which improves the durability of the heat-resistant piston 5 and improves its quality. Furthermore, it becomes possible to cope with excessive heat loads.
以上説明したように本発明は、耐熱性、耐摩純性に優れ
た特殊なアルミ合金からなるピストンリング用リングキ
ャリアに超音波アルミめっきを施し、このリングキャリ
アを母材とともに鋳ぐるんで形成したものである。した
がって、ピストンヘッドと母材との接合性が良くなり２
品質が向上するという効果がある。As explained above, the present invention is formed by applying ultrasonic aluminum plating to a ring carrier for a piston ring made of a special aluminum alloy with excellent heat resistance and wear resistance, and casting this ring carrier together with a base material. It is. Therefore, the bondability between the piston head and the base material is improved.
This has the effect of improving quality.
第１図および第２図は本発明の一実施例を示すもので、
第１図は鋳ぐるみ装置を示す縦断面図。
第２図は耐熱ピストンの斜視図である。
１・・・金型、２・・・ピストンリング用リングキャリ
ア、５・・・耐熱ピストン、Ｂ・・・ＡＣ８Ａ （母材
）。
出願人代理人 弁理士 鈴江武彦
第１図
・４”＞ ２ ｉ４1 and 2 show an embodiment of the present invention,
FIG. 1 is a longitudinal sectional view showing the casting device. FIG. 2 is a perspective view of the heat-resistant piston. DESCRIPTION OF SYMBOLS 1...Mold, 2...Ring carrier for piston rings, 5...Heat-resistant piston, B...AC8A (base material). Applicant's representative Patent attorney Takehiko Suzue Figure 1/4"> 2 i4
Claims (1)
ストンリング用リングキャリアの鋳ぐるみ接合側に超音
波アルミはんだめっきを施し、このピストンヘッド材を
金型内にセットした後、上記金型内に母材を注湯して上
記リングキャリアと上記母材とを一体としたことを特徴
とする耐熱ピストン。Ultrasonic aluminum solder plating is applied to the casting joint side of the ring carrier for piston rings, which is made of a special aluminum alloy with excellent heat resistance and wear resistance, and this piston head material is set in the mold. A heat-resistant piston characterized in that the ring carrier and the base material are integrated by pouring a base metal into the piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62288145A JPH01130865A (en) | 1987-11-13 | 1987-11-13 | Heat resistant piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62288145A JPH01130865A (en) | 1987-11-13 | 1987-11-13 | Heat resistant piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01130865A true JPH01130865A (en) | 1989-05-23 |
Family
ID=17726386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62288145A Pending JPH01130865A (en) | 1987-11-13 | 1987-11-13 | Heat resistant piston |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01130865A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5901772A (en) * | 1995-11-24 | 1999-05-11 | Izumi Industries, Ltd. | Method for casting pistons |
| JP2001334358A (en) * | 1999-12-20 | 2001-12-04 | Ahresty Corp | Method for manufacturing engine block |
-
1987
- 1987-11-13 JP JP62288145A patent/JPH01130865A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5901772A (en) * | 1995-11-24 | 1999-05-11 | Izumi Industries, Ltd. | Method for casting pistons |
| JP2001334358A (en) * | 1999-12-20 | 2001-12-04 | Ahresty Corp | Method for manufacturing engine block |
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