JPH0249957A - Manufacture of aluminum alloy-made piston - Google Patents
Manufacture of aluminum alloy-made pistonInfo
- Publication number
- JPH0249957A JPH0249957A JP19871488A JP19871488A JPH0249957A JP H0249957 A JPH0249957 A JP H0249957A JP 19871488 A JP19871488 A JP 19871488A JP 19871488 A JP19871488 A JP 19871488A JP H0249957 A JPH0249957 A JP H0249957A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- aluminum alloy
- piston
- wear
- wear resisting
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 title abstract 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title abstract 2
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000011159 matrix material Substances 0.000 claims abstract description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 4
- 239000004917 carbon fiber Substances 0.000 claims abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 abstract description 10
- 239000002184 metal Substances 0.000 abstract description 10
- 239000000835 fiber Substances 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000002657 fibrous material Substances 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 150000002736 metal compounds Chemical class 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 229920001296 polysiloxane Polymers 0.000 abstract 1
- 238000005242 forging Methods 0.000 description 4
- 238000005058 metal casting Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000002905 metal composite material Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 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
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000002689 soil Substances 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
-
- 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
- F05C2203/00—Non-metallic inorganic materials
- F05C2203/08—Ceramics; Oxides
- F05C2203/0804—Non-oxide ceramics
- F05C2203/0808—Carbon, e.g. graphite
-
- 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)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、内燃機関のアルミ合金製ピストンの製造方法
に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing an aluminum alloy piston for an internal combustion engine.
従来の技術
一般に例えば自動車用内燃機関特にガソリン機関のピス
トンは、機関の高性能化に伴い高い燃焼熱に晒され、そ
の冠面は２５０°Ｃ以上にも達し、また平均ピストン速
度は１３〜１５′″への高速でシリンダ内を往復してい
る。したがって、近時、軽量化を図るためにピストンを
アルミ合金製で一体成形するものが多くなり、またピス
トンリングが固着するリング溝の内壁を耐熱、耐摩耗性
に優れた繊維と金属の複合材料で構成することが多くな
っている。BACKGROUND ART In general, for example, the pistons of internal combustion engines for automobiles, particularly gasoline engines, are exposed to high combustion heat as the performance of the engine increases, and the crown surface reaches over 250°C, and the average piston speed is 13 to 15 Therefore, recently, in order to reduce weight, many pistons are integrally molded from aluminum alloy, and the inner wall of the ring groove where the piston ring is fixed is Increasingly, they are made of composite materials of fiber and metal, which have excellent heat and abrasion resistance.
斯かる従来のアルミ合金製ピストンの製造方法としては
、例えば特公昭６２−２９４９９号公報等に開示されて
おり、これは鋳型のモールドキャビティ底壁土にトップ
リング溝周壁となるアルミナーシリ力繊維成形体を載置
し、その鋳型内に溶融アルミ合金を注湯し、その鋳型に
液密的に嵌合するプランジャによりアルミ合金を加圧し
つつ凝固させてピストンの粗材を成形し、それを熱処理
（Ｔ、処理）した後に所定の寸法に加工してピストンを
製造するようになっ−ている。A conventional method for manufacturing such an aluminum alloy piston is disclosed in, for example, Japanese Patent Publication No. 62-29499, in which an alumina silicon fiber molded body, which will become the circumferential wall of the top ring groove, is placed on the bottom wall soil of the mold cavity of the mold. molten aluminum alloy is poured into the mold, the aluminum alloy is solidified while being pressurized by a plunger that fits liquid-tightly into the mold, and the rough material of the piston is formed, which is heat treated (T , treatment) and then processed into predetermined dimensions to manufacture pistons.
発明が解決しようとする課題
然し乍ら、上記従来の製造方法にあっては、押し出し溶
湯鍛造法を用いているため、訝通の金型鋳造法（Ｇ−Ｄ
−Ｃ）に比較して製造コストが高くなるばかりか、製品
の肉厚化が避けられず普通鋳造のような肉盗み（アンダ
ーカット）が不可能となる。したがって、ピストンの軽
量化が図れず機関性能の向上が十分に図れないといった
問題がある。Problems to be Solved by the Invention However, since the conventional manufacturing method described above uses an extrusion molten metal forging method, it is difficult to use the unconventional die casting method (G-D).
- Not only is the manufacturing cost higher than in C), but the thickness of the product is unavoidable, making it impossible to undercut as in normal casting. Therefore, there is a problem that the weight of the piston cannot be reduced and engine performance cannot be sufficiently improved.
課題を解決するための手段
本発明は、上記従来の製造方法の問題点に鑑みて案出さ
れたもので、炭素繊維材にアルミ合金をマトリックスし
てなる耐摩環を、ピストン鋳造用金型のトップリング溝
形成位置付近に配置すると共に、上記鋳造金型に溶湯ア
ルミ合金を注入して上記耐摩環を鋳ぐるみ、その後上記
耐摩環を含むピストンのリングランド付近を所定形状に
成形加工したことを特徴としている。Means for Solving the Problems The present invention has been devised in view of the problems of the conventional manufacturing method described above, and is made by manufacturing a wear-resistant ring made of a carbon fiber material with an aluminum alloy matrix in a piston casting mold. The top ring is placed near the groove forming position, and the wear ring is cast by pouring molten aluminum alloy into the casting mold, and then the area around the ring land of the piston including the wear ring is formed into a predetermined shape. It is a feature.
作用
」二記構成の本発明によれば、耐摩環を鋳ぐるんだアル
ミ合金製ピストンを、従来のような押し出し溶湯鍛造法
ではなく普通の溶湯鋳造法によって成形するようにした
ため、製造コストの低廉化が図れることは勿論のこと、
製品の肉厚化を回避できる。According to the present invention having the structure described in section 2, the aluminum alloy piston with the wear-resistant ring cast inside is formed by the ordinary molten metal casting method instead of the conventional extrusion molten metal forging method, which reduces manufacturing costs. Of course, it is possible to reduce the price,
It is possible to avoid thickening of the product.
実施例
以下、本発明に係るアルミ合金製ピストンの製造方法の
一実施例を図面に基づいて詳述する。EXAMPLE Hereinafter, an example of the method for manufacturing an aluminum alloy piston according to the present invention will be described in detail with reference to the drawings.
すなわち、この製造方法にあっては、まず外径がピスト
ンの外径と略同径に形成された円筒状の炭化けい素ウィ
スカーの繊維体（体積比１５％〜２０％）を加熱して金
型に載置し、該金型内に溶湯アルミ合金を注入し、マト
リックスに加圧成形して繊維強化金属複合材（Ｆ−Ｒ−
Ｍ）ｌを生成する（第１図参照）。次に、該繊維強化金
属複合材ｌを第２図に示すように所定肉厚寸法で輪切り
に切断加工してピストン１個分の耐摩環２を成形する。That is, in this manufacturing method, first, a cylindrical silicon carbide whisker fibrous body (volume ratio 15% to 20%) whose outer diameter is approximately the same as the outer diameter of the piston is heated to form gold. Placed in a mold, molten aluminum alloy is injected into the mold, and the matrix is press-formed to form a fiber-reinforced metal composite (F-R-
M) generate l (see Figure 1). Next, as shown in FIG. 2, the fiber-reinforced metal composite material 1 is cut into rings with a predetermined wall thickness to form a wear ring 2 for one piston.
続いて、この耐摩環２をピストン溶湯鋳造金型の底部つ
まりピストンのトップリング溝形成位置付近に配置し、
この鋳造金型内にピストン母材となる所定温度の溶湯ア
ルミ合金を注入して上記耐摩環２をピストン母材３に普
通の鋳造法によって鋳ぐるむ（第３図参照）。そして、
上記ピストン母材３の凝固冷却後、該ピストン母材３の
外表面を加工すると共に、耐摩環２の外周を断面路コ字
形に切削加工してトップリング溝４の周壁を成形し、ま
た該トップリング溝４の下方にセカンドリング溝５やオ
イルリング溝６を夫々所定の深さ寸法に加工すれば、Ｆ
−Ｒ−Ｍの耐摩環２を備えたアルミ合金製ピストン７が
成形される。Next, this wear-resistant ring 2 is placed at the bottom of the piston molten metal casting mold, that is, near the piston top ring groove formation position,
A molten aluminum alloy at a predetermined temperature is injected into the casting mold to form the piston base material, and the wear ring 2 is cast into the piston base material 3 by a common casting method (see FIG. 3). and,
After solidifying and cooling the piston base material 3, the outer surface of the piston base material 3 is processed, and the outer periphery of the wear-resistant ring 2 is cut into a U-shaped cross section to form the peripheral wall of the top ring groove 4. If the second ring groove 5 and the oil ring groove 6 are machined to the predetermined depth below the top ring groove 4, then the F
An aluminum alloy piston 7 having a wear ring 2 of -R-M is molded.
したがって、この実施例によれば、アルミ合金製ピスト
ン７を普通の溶湯鋳造法によって成形したため、従来の
溶湯鍛造法に比較して製造コストの低廉化が図れる。Therefore, according to this embodiment, since the aluminum alloy piston 7 is formed by a normal molten metal casting method, the manufacturing cost can be reduced compared to the conventional molten metal forging method.
ところで、一般に普通鋳造法では、耐摩環をニレジスト
合金で成形することがあるが、斯かるニレジスト合金（
Ｎｉ含有量１３，５〜１７．５％）は、材料コストが高
くなるのに対し、本実施例の耐摩環２は炭化けい素ウィ
スカー（体積比１５％）の繊維体にアルミ合金をマトリ
ックスにしたＦ−Ｒ・Ｍ材を使用しているため材料コス
トの低廉化が図れる。By the way, in general, in the ordinary casting method, the wear-resistant ring is sometimes formed of Niresist alloy, but such Niresist alloy (
If the Ni content is 13.5% to 17.5%, the material cost will be high, whereas the wear-resistant ring 2 of this embodiment is made of a fiber body of silicon carbide whiskers (volume ratio 15%) and an aluminum alloy matrix. Since FR・M material is used, the material cost can be reduced.
また、ニレジスト合金耐摩環の場合は、鋳ぐるみ前に行
われるアルミナイズ処理の際にアルミナイズ溶湯の鉄分
Ｆｅが３％以上になると廃材処理をしなければならない
が、Ｆ −Ｒ−Ｍ耐摩環２の場合はアルミナイズ溶湯の
鉄分Ｆｅが多く発生しないため、廃材処理が大巾に減少
しこの点からもコストの低廉化が図れる。In addition, in the case of Niresist alloy wear rings, if the iron content of the aluminized molten metal becomes 3% or more during the aluminization treatment performed before casting, the scrap material must be disposed of, but F-R-M wear rings must be disposed of as waste. In case 2, since a large amount of iron (Fe) in the aluminized molten metal is not generated, the amount of waste material to be disposed of is greatly reduced, and from this point of view as well, costs can be reduced.
発明の効果
以上の説明で明らかなように、本発明に係るアルミ合金
ピストンの製造方法によれば、炭素繊維材にアルミ合金
をマトリックスしてなる耐摩環を、ピストン鋳造用金型
のトップリング溝形成位置付近に配置すると共に、上記
鋳造金型に溶湯アルミ合金を注入して上記耐摩環を鋳ぐ
るみ、その後上記耐摩環を含むピストンのリングランド
付近を所定形状に成形加工し、アルミ合金製ピストンを
普通の溶湯鋳造法を用いて製造したため、溶湯鍛造法に
比較して製造コストの低廉化が図れることは勿論のこと
、製品の肉厚化が回避され、所謂アンダーカットが可能
となりピストンの軽量化が図れる。この結果、機関性能
を十分に同上させることができる。Effects of the Invention As is clear from the above explanation, according to the method for manufacturing an aluminum alloy piston according to the present invention, a wear-resistant ring made of a carbon fiber material and an aluminum alloy matrix is placed in a top ring groove of a piston casting mold. At the same time, molten aluminum alloy is poured into the casting mold to cast the wear ring, and then the area around the ring land of the piston including the wear ring is formed into a predetermined shape to form an aluminum alloy piston. Because it was manufactured using the ordinary molten metal casting method, it is possible to reduce the manufacturing cost compared to the molten metal forging method, and it also avoids thickening of the product, making so-called undercuts possible, and making the piston lighter. can be achieved. As a result, the engine performance can be sufficiently improved.
第１図〜第４図は本発明に係るアルミ合金製ピストンの
製造方法の一実施例を示す製造工程説明図である。
■・・・繊維強化金属複合材、２・・・耐摩環、３・・
・ピストン母材、４・−・トップリング溝、７・・・ア
ルミ合金製ピストン。1 to 4 are manufacturing process explanatory diagrams showing an embodiment of the method for manufacturing an aluminum alloy piston according to the present invention. ■...Fiber-reinforced metal composite material, 2...Wear-resistant ring, 3...
・Piston base material, 4...Top ring groove, 7...Aluminum alloy piston.
Claims (1)
耐摩環を、ピストン鋳造用金型のトップリング溝形成位
置付近に配置すると共に、上記鋳造金型に溶湯アルミ合
金を注入して上記耐摩環を鋳ぐるみ、その後上記耐摩環
を含むピストンのリングランド付近を所定形状に成形加
工したことを特徴とするアルミ合金製ピストンの製造方
法。(1) A wear-resistant ring made of a carbon fiber material and an aluminum alloy matrix is placed near the top ring groove forming position of a piston casting mold, and a molten aluminum alloy is injected into the casting mold to form the wear-resistant ring. 1. A method for manufacturing an aluminum alloy piston, characterized in that the ring land area of the piston including the wear-resistant ring is formed into a predetermined shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19871488A JPH0249957A (en) | 1988-08-09 | 1988-08-09 | Manufacture of aluminum alloy-made piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19871488A JPH0249957A (en) | 1988-08-09 | 1988-08-09 | Manufacture of aluminum alloy-made piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0249957A true JPH0249957A (en) | 1990-02-20 |
Family
ID=16395787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19871488A Pending JPH0249957A (en) | 1988-08-09 | 1988-08-09 | Manufacture of aluminum alloy-made piston |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0249957A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007323130A (en) * | 2006-05-30 | 2007-12-13 | Laurel Seiki Kk | Bill processor |
| JP2021046797A (en) * | 2019-09-17 | 2021-03-25 | いすゞ自動車株式会社 | Piston for internal combustion engine, method for manufacturing the same and vehicle |
-
1988
- 1988-08-09 JP JP19871488A patent/JPH0249957A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007323130A (en) * | 2006-05-30 | 2007-12-13 | Laurel Seiki Kk | Bill processor |
| US8113508B2 (en) | 2006-05-30 | 2012-02-14 | Laurel Precision Machines Co., Ltd. | Bill processor |
| JP2021046797A (en) * | 2019-09-17 | 2021-03-25 | いすゞ自動車株式会社 | Piston for internal combustion engine, method for manufacturing the same and vehicle |
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