JPH0326859A - Piston for internal combustion engine - Google Patents
Piston for internal combustion engineInfo
- Publication number
- JPH0326859A JPH0326859A JP15675989A JP15675989A JPH0326859A JP H0326859 A JPH0326859 A JP H0326859A JP 15675989 A JP15675989 A JP 15675989A JP 15675989 A JP15675989 A JP 15675989A JP H0326859 A JPH0326859 A JP H0326859A
- Authority
- JP
- Japan
- Prior art keywords
- piston
- groove
- stepped
- cooling oil
- oil passage
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 13
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 239000002131 composite material Substances 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims abstract 3
- 230000000903 blocking effect Effects 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000003754 machining Methods 0.000 abstract description 3
- 229910052759 nickel Inorganic materials 0.000 abstract description 2
- 229910052710 silicon Inorganic materials 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 2
- 238000005728 strengthening Methods 0.000 abstract 2
- 239000012768 molten material Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 11
- 238000005266 casting Methods 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 4
- 239000012779 reinforcing material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 150000003839 salts Chemical group 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
《産業上の利用分野》
本発明は、ピストンの所要部の耐摩耗性と耐熱強度の向
上を図るようにした内燃エンジン用ピストンに関する．
《従来の技術》
ピストンの所要部の耐摩耗性の向上を図るようにしたピ
ストンとしては、一例として特開昭６２−２３３４５６
号公報に開示されているものが知られている．このピス
トンを概説すると、第３図に示すようにピストン１に設
けられたトップリング溝２には強化材料を含有する溶加
材（不図示）によって肉盛溶接された肉盛部３が形成さ
れ、複合強化部を成している。DETAILED DESCRIPTION OF THE INVENTION <<Industrial Application Field>> The present invention relates to a piston for an internal combustion engine that is designed to improve the wear resistance and heat resistance strength of the piston at its required parts. <<Prior Art>> An example of a piston designed to improve the wear resistance of the required parts of the piston is disclosed in Japanese Patent Application Laid-Open No. 62-233456.
The one disclosed in the No. 1 publication is known. To outline this piston, as shown in Fig. 3, a top ring groove 2 provided in a piston 1 has an overlay welded part 3 with a filler metal (not shown) containing a reinforcing material. , forming a composite reinforcement part.
一方ピストンの所要部の耐熱強度の向上を図るようにし
たピストンとしては、ピストンの所要部に冷却手段を用
いなくてはならない。On the other hand, for a piston designed to improve the heat resistance strength of a required portion of the piston, a cooling means must be used for the required portion of the piston.
そこでピストンの所要部内壁に冷却オイル（一般には、
エンジンオイル）の通路を設けるためにピストン本体の
鋳造時にソルトコアを同時に所要部へ鋳ぐるみし、その
後に温水による溶解脱塩処理を施こし、所要部周辺に冷
却オイル通路を形成するなどの方法がとられていた。Therefore, cooling oil (generally,
In order to create passages for (engine oil), a method such as casting a salt core into the required areas at the same time as the piston body is cast, and then dissolving and desalting it with hot water to form cooling oil passages around the required areas. It had been taken.
《発明が解決しようとする課題》
しかし上記従来の内燃エンジン用ピストンにおいて、前
者のピストンでは所要部を複合強化したことにより耐摩
耗性に勝れるし、また鋳造時、加工時において工数がか
かることもないが、反面耐熱強度に対する問題を生じる
恐れがある。<Problems to be Solved by the Invention> However, among the conventional pistons for internal combustion engines mentioned above, the former piston has excellent wear resistance due to composite reinforcement of required parts, and also requires a lot of man-hours during casting and machining. However, on the other hand, it may cause problems regarding heat resistance strength.
一方、後者のピストンでは冷却オイル通路を設けたこと
により耐熱強度に勝れるものの鋳造時にソルトコアを使
用するので、金型に腐食が生じ易く金型の寿命が悪い．
また上記と同様に鋳造時に砂の中子を使用すると、マト
リクスがしみ込むので、塗型材を塗る必要があるため、
工程のサイクルタイムが長くなり、コスト高になる．本
発明はこのような従来の問題点を解決するために、ピス
トンの所要部の耐摩耗性と耐熱強度を向上することがで
きる内燃エンジン用ピストンを提供することを目的とす
るものである．《課題を解決するための手段》
本発明は、上記目的を達威するために、ピストンの所要
部の周面部に開先口付の段付溝を形成し、段付溝の段部
に遮断板を挿入当接して冷却オイル通蕗を形成し、段付
溝の開先口に強化材料を含有する溶加材で、肉盛溶接を
施して成る複合強化部を有するリング渭を形成したこと
を特徴とする。On the other hand, although the latter type of piston has excellent heat resistance and strength due to the provision of a cooling oil passage, since a salt core is used during casting, the mold is prone to corrosion and has a short lifespan.
Also, as mentioned above, if you use a sand core during casting, the matrix will soak in, so you will need to apply mold coating material.
Process cycle time becomes longer and costs increase. In order to solve these conventional problems, it is an object of the present invention to provide a piston for an internal combustion engine that can improve the wear resistance and heat resistance strength of the required parts of the piston. <<Means for Solving the Problems>> In order to achieve the above object, the present invention forms a stepped groove with a groove opening on the circumferential surface of a required portion of the piston, and a cutoff is provided at the step of the stepped groove. A cooling oil passage is formed by inserting and abutting a plate, and a ring arm having a composite reinforced part is formed by overlaying welding with a filler material containing a reinforcing material at the groove opening of the stepped groove. It is characterized by
《作用》
したがって本発明による内燃エンジン用ピストンでは、
ピストンの所要部に複合強化部を有するリング溝と、こ
のリング溝に並べて冷却オイル通路が形威される．この
ため鋳造時にソルトコア等を使用しないので鋳造時の工
数は減らすことができる。<<Operation>> Therefore, in the piston for an internal combustion engine according to the present invention,
A ring groove with a composite reinforcement part is formed in the required part of the piston, and a cooling oil passage is formed in line with this ring groove. Therefore, since a salt core or the like is not used during casting, the number of man-hours during casting can be reduced.
《実施例》
以下、本発明の実施例を第１図及び第２図（ａ），ｔｂ
ｌ， （ｃｌに基づいて説明する。<<Example>> Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2 (a) and tb.
l, (explained based on cl.
第１図は本発明に係る内燃エンジン用ピストンの一実施
例を示す断面図、第２図（ａ！， （ｂｌ， （ｃｌは
、同内燃エンジン用ピストンの要部を示す断面図である
。FIG. 1 is a sectional view showing one embodiment of a piston for an internal combustion engine according to the present invention, and FIG. 2 (a!, (bl, (cl) are sectional views showing essential parts of the piston for an internal combustion engine.
第１図及び第２図において、内燃エンジン用ピストン１
０は、アルミニウム合金を重力鋳造でほぼ円柱の形状を
なすとともに、その上部外周面には３つのリング渭１１
，１２．１３が形成されている．トップリングＩｌｌに
は複合強化部１０ｄが形成してあり、このトップリング
溝１１内部に冷却オイル通路１０ｃが設けてある。In FIGS. 1 and 2, a piston 1 for an internal combustion engine is shown.
0 is made of aluminum alloy by gravity casting to form an almost cylindrical shape, and has three ring arms 11 on its upper outer circumferential surface.
, 12.13 are formed. A composite reinforced portion 10d is formed in the top ring Ill, and a cooling oil passage 10c is provided inside the top ring groove 11.
すなわちピストン本体１５の外周部上側に開先口１０ａ
付の段付溝１１ａが全周に渡って形成してあり、この段
付溝１１ａの段部１０ｂに遮断板２０を挿入当接して冷
却オイル通路１０ｃが全周に渡って形成されている。肉
盛部２１を遮断する遮断板２０は、トップリング溝１１
の底部１ｌｂを形戒し、リング状をしており、一部が切
断されている。さらに、全周に渡り前記開先口１０ａに
は強化材料として例えばＳｉ，Ｎｉ，Ｃｕ等を含む溶加
材〈不図示〉を用い、レーザビーム溶接、あるいはミグ
溶接等の方法によって肉盛溶接を施こすことにより肉盛
部２１を形成し、機械加工等により、複合強化部１０ｄ
を有するトップリング溝１１が形成してある。なお冷却
オイル通路１０Ｃには、ピンボス部のピンを避けて下向
きに連通孔（不図示）か設けられている．
また、トップリング渭１１の深さは、必要に応じて変更
できる。That is, the groove opening 10a is formed on the upper side of the outer circumference of the piston body 15.
A stepped groove 11a is formed over the entire circumference, and a cooling oil passage 10c is formed over the entire circumference by inserting and abutting a blocking plate 20 into the stepped portion 10b of the stepped groove 11a. The blocking plate 20 that blocks the built-up portion 21 is connected to the top ring groove 11.
The bottom 1lb of the ring is shaped like a ring, with a portion cut off. Further, filler metal (not shown) containing Si, Ni, Cu, etc. is used as a reinforcing material in the groove opening 10a over the entire circumference, and overlay welding is performed by a method such as laser beam welding or MIG welding. By applying this, the build-up portion 21 is formed, and by machining or the like, the composite reinforced portion 10d is formed.
A top ring groove 11 having a diameter is formed. Note that a communication hole (not shown) is provided in the cooling oil passage 10C downward, avoiding the pin of the pin boss portion. Further, the depth of the top ring arm 11 can be changed as necessary.
したがって上記実施例によれば、ピストンのトップリン
グ溝１１内部に冷却オイル通１ｌ１０ｃを設けるととも
に、このトップリング溝１１に複合強化部１０ｄを形成
しているので、ピストンリング講１１周辺の耐摩耗性と
耐熱強度をともに向上することができる．
《発明の効果》
以上のように、本発明による内燃エンジン用ピストンは
ー、ピストンの所要部の周面部に開先口付の段付溝を形
威し、段付溝の段部に遮断板を挿入当接して冷却オイル
通路を形成し、段付溝の開先口に強化材料を含有する溶
加材で、肉盛溶接を總して成る複合強化部を有するリン
グ渭を形威しているので、ピストンリング渭周辺の耐摩
耗性と耐熱強度をともに向上することができる。Therefore, according to the above embodiment, the cooling oil passage 1l10c is provided inside the top ring groove 11 of the piston, and the composite reinforced portion 10d is formed in the top ring groove 11, so that the wear resistance around the piston ring groove 11 is improved. It is possible to improve both heat resistance and strength. <<Effects of the Invention>> As described above, the piston for an internal combustion engine according to the present invention has a stepped groove with a bevel opening on the circumferential surface of a required part of the piston, and a blocking plate is provided in the stepped part of the stepped groove. A cooling oil passage is formed by inserting and abutting the grooves, and a ring arm is formed with a composite reinforced part made by overlay welding with filler metal containing a reinforcing material at the groove opening of the stepped groove. Therefore, both the wear resistance and heat resistance strength around the piston ring edges can be improved.
第１図は本発明の一実施例を示す内燃用エンジンのピス
トンの断面図、第２図ｔａｌ， （ｂｉ， （ｃｌは同
内燃エンジン用ピストンの要部を示す断面図、第３図は
従来の内燃エンジン用ピストンの要部を示す断面図であ
る．
１０・・・ピストン、１０ｃ・・・冷却オイル溝、１０
ｄ・・：複合強化部、１１・・・トップリング渭、２０
・・・遮断板、２１・・・肉盛部。
（Ｑ）
第
１
図
第
２
図
（ｂ）
第
３
図FIG. 1 is a cross-sectional view of a piston for an internal combustion engine showing an embodiment of the present invention, FIG. 2 is a cross-sectional view showing main parts of the piston for the internal combustion engine, and FIG. It is a sectional view showing the main parts of a piston for an internal combustion engine. 10... Piston, 10c... Cooling oil groove, 10
d...: Composite reinforcement part, 11... Top ring side, 20
...Blocking plate, 21... Overlay part. (Q) Figure 1 Figure 2 (b) Figure 3
Claims (1)
、段付溝の段部に遮断板を挿入当接して冷却オイル通路
を形成し、段付溝の開先口に強化材料を含有する溶加材
で、肉盛溶接を施して成る複合強化部を有するリング溝
を形成したことを特徴とする内燃エンジン用ピストン。A stepped groove with a groove opening is formed on the peripheral surface of the required part of the piston, and a blocking plate is inserted into and abutted against the stepped part of the stepped groove to form a cooling oil passage, and the groove opening of the stepped groove is reinforced. 1. A piston for an internal combustion engine, characterized in that a ring groove is formed with a composite reinforced portion formed by overlay welding with a filler metal containing a material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1156759A JP2772545B2 (en) | 1989-06-21 | 1989-06-21 | Piston for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1156759A JP2772545B2 (en) | 1989-06-21 | 1989-06-21 | Piston for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0326859A true JPH0326859A (en) | 1991-02-05 |
| JP2772545B2 JP2772545B2 (en) | 1998-07-02 |
Family
ID=15634702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1156759A Expired - Lifetime JP2772545B2 (en) | 1989-06-21 | 1989-06-21 | Piston for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2772545B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007294573A (en) * | 2006-04-24 | 2007-11-08 | Matsushita Electric Works Ltd | Magnetic material device, manufacturing method thereof and discharge lamp lighting device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006027355A1 (en) * | 2006-06-13 | 2007-12-20 | Mahle International Gmbh | Piston for an internal combustion engine and method for its production |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58190538A (en) * | 1982-04-30 | 1983-11-07 | Yamaha Motor Co Ltd | Forged piston for internal-combustion engine |
| JPS63127755U (en) * | 1987-02-06 | 1988-08-22 | ||
| JPS63318365A (en) * | 1987-06-19 | 1988-12-27 | Atsugi Motor Parts Co Ltd | Piston |
-
1989
- 1989-06-21 JP JP1156759A patent/JP2772545B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58190538A (en) * | 1982-04-30 | 1983-11-07 | Yamaha Motor Co Ltd | Forged piston for internal-combustion engine |
| JPS63127755U (en) * | 1987-02-06 | 1988-08-22 | ||
| JPS63318365A (en) * | 1987-06-19 | 1988-12-27 | Atsugi Motor Parts Co Ltd | Piston |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007294573A (en) * | 2006-04-24 | 2007-11-08 | Matsushita Electric Works Ltd | Magnetic material device, manufacturing method thereof and discharge lamp lighting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2772545B2 (en) | 1998-07-02 |
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