JPS6047033B2 - Cylinder block and its manufacturing method - Google Patents
Cylinder block and its manufacturing methodInfo
- Publication number
- JPS6047033B2 JPS6047033B2 JP9884279A JP9884279A JPS6047033B2 JP S6047033 B2 JPS6047033 B2 JP S6047033B2 JP 9884279 A JP9884279 A JP 9884279A JP 9884279 A JP9884279 A JP 9884279A JP S6047033 B2 JPS6047033 B2 JP S6047033B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- core
- reinforcing member
- cooling passage
- cylinder block
- 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
Landscapes
- Casting Devices For Molds (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【発明の詳細な説明】
この発明は水冷式エンジンのシリンダブロックとその製
造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cylinder block for a water-cooled engine and a method for manufacturing the same.
一般に、自動車のエンジン等に使用される水冷式エンジ
ンは、第1図に示す如く、エンジンのシーリンダ1の外
周に水の通路を形成するためのウオータジヤケツト2が
設けてあり、ラジエータ3で冷却した水をウォータポン
プ4によりエンジンのシリンダ1外周とラジエータ3と
の間で循環させることにより、エンジンの冷却を行なつ
ている。In general, water-cooled engines used in automobile engines, etc., are provided with a water jacket 2 around the outer periphery of a cylinder 1 of the engine to form a passage for water, as shown in Fig. 1, and are cooled by a radiator 3. The engine is cooled by circulating the water between the outer periphery of the cylinder 1 of the engine and the radiator 3 using the water pump 4.
)そして、この冷却水によるシリンダ1の冷却効果を
向上させ、且つシリンダ1全体を均一に冷却することに
より、シリンダ1が熱によつて変形し、異音が発生した
りするのを完全に防止するには、第1図に示すように各
シリンダ1をそれぞれ・独立した状態に形成し、各シリ
ンダ1間に冷却水の流通する通路5を設けておく必要が
あるが、各シリンダ1間の間隔を大きく取り、通路5を
大きくすると冷却効果は向上するが、エンジン全体が大
型化するといつた問題が生じるため、上記通路5はでき
るだけ狭まくすることが好ましい。ところが上記したよ
うなエンジンのシリンダ1及びウォータジャケット2か
らなるシリンダブ泪ツク6は、主体となる鋳型(通常、
母型と称される)と第2図に示すような砂型等の中子7
とを組合せ、鋳造により製造しており、シェル砂等の砂
型中子7のみを用いる場合は、中子製造時に抜け勾配を
設ける必要があるため、砂型中子7の各シリンダ間に冷
却用通路を形成するための部分8をあまり薄くすると、
特に当該部分8の上方が非常に薄くなり、鋳造時に変形
したり或は破損する危険性が生じるため、この部分8の
肉厚Tを5〜6?以下にすることができなかつた。この
ため、上記中子7を用いて鋳造されるシリンダブロック
の各シリンダ間に形成される冷却用通路の幅を5〜6朋
以下にすることができず、エンジンの小型軽量化に限界
があつた。そこでこの発明はシリンダブロック鋳造時に
使用する中子の各シリンダ間に冷却用通路を形成するた
めの部分の少なくとも上端外周面に、上記冷却用通路部
分を挾持する断面コ字状をなし、しかも、該冷却用通路
部分からその両側壁部分へ延びる中子変形防止部片を有
する補強部材を被嵌し、当該部分を従来より薄く形成で
きるようにすることにより、上記欠点を除去したもので
あり、以下この発明の詳細な説明に示す実施例に従つて
説明すると次の通りである。) By improving the cooling effect of this cooling water on the cylinder 1 and uniformly cooling the entire cylinder 1, it is possible to completely prevent the cylinder 1 from deforming due to heat and generating abnormal noises. In order to do this, it is necessary to form each cylinder 1 independently as shown in Fig. 1, and to provide a passage 5 through which cooling water flows between each cylinder 1. If the interval is increased and the passage 5 is enlarged, the cooling effect will be improved, but if the overall size of the engine is increased, such problems will arise, so it is preferable to make the passage 5 as narrow as possible. However, the cylinder cylinder 6 consisting of the cylinder 1 and water jacket 2 of the engine as described above is made of a main mold (usually
(referred to as a matrix) and a core 7 of a sand mold etc. as shown in Figure 2.
If only the sand mold core 7 made of shell sand or the like is used, it is necessary to provide a draft during core manufacturing, so a cooling passage is provided between each cylinder of the sand mold core 7. If the part 8 to form is made too thin,
Particularly, the upper part of the part 8 becomes very thin and there is a risk of deformation or breakage during casting, so the thickness T of this part 8 is set at 5 to 6 mm. I couldn't do less. For this reason, the width of the cooling passage formed between each cylinder of the cylinder block cast using the core 7 cannot be reduced to less than 5 to 6 mm, which limits the ability to reduce the size and weight of the engine. Ta. Therefore, the present invention provides a core for use in cylinder block casting, in which at least the outer circumferential surface of the upper end of the portion for forming the cooling passages between the cylinders has a U-shaped cross section that sandwiches the cooling passage portions, and further, The above-mentioned drawbacks are eliminated by fitting a reinforcing member having a core deformation prevention piece extending from the cooling passage portion to both side wall portions, thereby making it possible to form this portion thinner than before. The following is a description of the embodiments shown in the detailed description of the present invention.
第3図及ひ第4図は、この発明に係るシリンダブロック
鋳造時に使用する中子を示す平面図及び1−1線断面図
であり、この中子10の各シリンダ間に冷却水の通る冷
却用通路を形成するための部分11の少なくとも上端外
周面には、金属性の板状部材を断面コ字状に折曲してな
る補強部材12を被嵌し、冷却用通路を形成する部分1
1の強度、特に抜き勾配により内厚の薄くなつている上
部の強度を向上させておく。3 and 4 are a plan view and a cross-sectional view taken along the line 1-1 showing a core used when casting a cylinder block according to the present invention. Cooling water passes between each cylinder of this core 10. A reinforcing member 12 formed by bending a metal plate-like member into a U-shaped cross section is fitted onto at least the upper end outer circumferential surface of the portion 11 for forming the cooling passage.
1, especially the strength of the upper part where the inner thickness is thinner due to the draft angle.
もちろん下部の強度を向上させるために部分11の下端
外周面に補強部材12を被嵌しても良いことはいうまで
もない。このようにして中子10の冷却用通路を形成す
る部分11の強度を向上させておけば、この部分の内厚
Tを2〜37077!程度まで薄く形成できる。そして
上記中子10を使用してシリンダブロックを鋳造すれば
、第5図及び第6図に示すような、各シリンダ13がそ
れぞれ完全に独立し、且つ各シリンダ13間に形成され
る冷却水の通る冷却用通路14の幅を極力狭まくしたシ
リンダブロック15を得ることができる。尚、この中子
10を使用してシリンダブロック15を鋳造する楊合、
中子10の冷却用通路を形成する部分11の上部又は下
部に被嵌させた補強部材12は、鋳造時にシリンダ13
の外壁面上部に鋳込まれた状態となり、冷却用通路14
内に補強部材12が突出することはないため、補強部材
12によりエンジンの冷却効率が低下することはない。
第7図及び第8図は中子10の冷却用通路を形成するた
めの部分11の上部又は下部外周面に被嵌させる補強部
材12の他の実施例を示すものてあり、第7図に示すも
のは金属性の板状部材をコ字状に折曲して形成した補強
部材12の上端部にコ字状をした支持アーム16を固着
したものであり、補強部材12を中子10の冷却用通路
を形成するための部分に被嵌さす時、支持アーム16両
端の折曲部16aを、第9図に示す如く中子10の外周
に設けた凹部10aに接触させ、鋳造時、中子の内方か
ら外方に向つて生じる力により、中子10の冷却用通路
を形成するための部分11が変形するのを防止するよう
にしたものである。Of course, it goes without saying that the reinforcing member 12 may be fitted onto the outer peripheral surface of the lower end of the portion 11 in order to improve the strength of the lower portion. If the strength of the portion 11 forming the cooling passage of the core 10 is improved in this way, the inner thickness T of this portion can be increased from 2 to 37077! It can be formed as thin as possible. If a cylinder block is cast using the core 10, each cylinder 13 will be completely independent, and the cooling water formed between each cylinder 13 will be as shown in FIGS. 5 and 6. It is possible to obtain a cylinder block 15 in which the width of the cooling passage 14 passing therethrough is made as narrow as possible. In addition, Yanghe, who uses this core 10 to cast the cylinder block 15,
The reinforcing member 12 fitted into the upper or lower part of the portion 11 forming the cooling passage of the core 10 is inserted into the cylinder 13 during casting.
It is cast into the upper part of the outer wall surface of the cooling passage 14.
Since the reinforcing member 12 does not protrude inward, the cooling efficiency of the engine is not reduced by the reinforcing member 12.
7 and 8 show other embodiments of the reinforcing member 12 fitted to the upper or lower outer peripheral surface of the portion 11 for forming the cooling passage of the core 10. What is shown is a U-shaped support arm 16 fixed to the upper end of a reinforcing member 12 formed by bending a metal plate-like member into a U-shape. When fitting the part for forming the cooling passage, the bent portions 16a at both ends of the support arm 16 are brought into contact with the recesses 10a provided on the outer periphery of the core 10 as shown in FIG. This prevents the portion 11 of the core 10 for forming the cooling passage from being deformed due to the force generated from the inside to the outside of the core.
又第8図に示すものは、補強部材12の両側面に外方に
拡関した舌片17を複数個形成しておき、補強部材12
を中子10の冷却用通路を形成するための部分11に被
嵌さす時、第10図に示す如く舌片17を中子10の内
壁面10bに接触させることにより、鋳造時、中子10
の外方から内方に向つて生ずる力により、中子10の冷
却用通路を形成するための部分11が変形するのを防止
したものてある。もちろんこれに前記の支持アームを固
着することによつて内方から外方に向つて生ずる力に対
抗することもでき、両方向の力による変形を防止できる
。又第11図のように補強部材12の舌片17の中子1
0の製作時に中子中に配設し、鋳造の際の両方向の力に
よる部分11の変形を防止することができる。以上説明
したようにこの発明のシリンダブロックは、複数の独立
型のシリンダの周囲を囲繞し、各シリンダ間にシリンダ
配列方向の幅寸法を狭くノした冷却用通路を有し、各冷
却用通路の上端又は下端に該通路を跨いで鋳込み埋設さ
れた断面コ字形の金属製補強部材と、該補強部材に一体
化され、上記通路に沿つてシリンダ配列方向と直交する
方向の両側壁部分まで延長された中子変形防止7部片と
を具備しているから、従来に比べて各シリンダ間の冷却
用通路の幅を半分程度まで減少させることができ、全体
を小型軽量化させることができ、勿論、各シリンダを独
立型として均一な冷却効果を保持させることができ、か
つ、補強部材やフ中子変形防止部片は、冷却水通路を形
成する壁面に面一状に鋳込み埋設され、冷却水通路の抵
抗とならず、これらの部分のシリンダブロックを補強す
る効果がある。Further, in the case shown in FIG. 8, a plurality of tongue pieces 17 extending outward are formed on both sides of the reinforcing member 12, and the reinforcing member 12
When the tongue piece 17 is fitted into the cooling passage forming portion 11 of the core 10, the tongue piece 17 is brought into contact with the inner wall surface 10b of the core 10 as shown in FIG.
This prevents the portion 11 for forming the cooling passage of the core 10 from deforming due to the force generated from the outside toward the inside. Of course, by fixing the above-mentioned support arm to this, it is also possible to resist the forces generated from the inside to the outside, thereby preventing deformation due to forces in both directions. Also, as shown in FIG. 11, the core 1 of the tongue piece 17 of the reinforcing member 12
It is possible to prevent deformation of the portion 11 due to forces in both directions during casting. As explained above, the cylinder block of the present invention surrounds a plurality of independent cylinders, has a cooling passage between each cylinder with a narrow width dimension in the cylinder arrangement direction, and has a narrow width dimension in the cylinder arrangement direction. A metal reinforcing member having a U-shaped cross section is cast and embedded at the upper end or the lower end across the passageway, and is integrated with the reinforcing member and extends along the passageway to both side wall portions in a direction orthogonal to the cylinder arrangement direction. Since it is equipped with seven core deformation prevention pieces, it is possible to reduce the width of the cooling passage between each cylinder to about half compared to the conventional one, and the whole can be made smaller and lighter. , it is possible to maintain a uniform cooling effect as each cylinder is an independent type, and the reinforcing member and the core deformation prevention piece are cast and embedded flush with the wall surface forming the cooling water passage, so that the cooling water can be maintained evenly. It does not create resistance to the passage and has the effect of reinforcing the cylinder block in these parts.
また、この発明のシリンダブロックの製造方法は、複数
のシリンダボアを一列で等間隔に配列し、全体を中子砂
で角形ブロック状に形成され、各シリンダボア間に薄肉
の冷却用通路形成部分をもち、この部分の上端又は下端
に該部分を跨いて被嵌された断面コ字形の金属製補強部
材と、該補強部材に一体化され、上記通路形成部分に沿
つてシリンダボアの配列方向と直交する方向の両側壁部
分まで延長された中子変形防止部片とを有する中子を母
型鋳型内に配置して鋳造するから、各シリンダボア間の
冷却用通路形成部分の中子肉厚を薄くすることができ、
シリンダブロック全体を小型軽量化でき、かつ、上記薄
肉部には補強部材及ひ中子変形防止部片を装着してある
ため、中子の成形時、母型へ組込み等の取扱い時や注湯
時の圧力で損壊することが防止され、幅の狭い冷却用通
路を正確に形成させることが可能となり、冷却効率の良
い小型軽量なエンジンを提供でき、さらに、補強部材や
中子変形防止部片は、薄肉部全長に施すのではなく、欠
損し易い上端又は下端のみに局部的に施すもので、必要
最小限の部材でよく、低コストで製造できると共に伝熱
性を阻害することもない効果がある。Further, in the method for manufacturing a cylinder block of the present invention, a plurality of cylinder bores are arranged in a line at equal intervals, the whole is formed into a rectangular block shape with core sand, and a thin-walled cooling passage forming part is provided between each cylinder bore. , a metal reinforcing member having a U-shaped cross section fitted over the upper end or lower end of this part and spanning the part, and a metal reinforcing member integrated with the reinforcing member and extending along the passage forming part in a direction perpendicular to the arrangement direction of the cylinder bores. Since the core having core deformation prevention pieces extending to both side wall portions is placed in the mother mold and cast, the thickness of the core at the cooling passage forming portion between each cylinder bore can be reduced. is possible,
The entire cylinder block can be made smaller and lighter, and the thin wall section is equipped with a reinforcing member and a core deformation prevention piece, so it can be used during handling such as molding the core, incorporating it into the mother mold, etc. It is possible to prevent damage due to the pressure of the engine, it is possible to accurately form narrow cooling passages, and it is possible to provide a small and lightweight engine with good cooling efficiency. This method is not applied to the entire length of the thin wall part, but is applied locally only to the upper or lower end, which is prone to breakage.It requires only the minimum number of parts required, can be manufactured at low cost, and has the effect of not impeding heat transfer. be.
第1図は水冷式エンジンを示す部分断面図、第2図は水
冷式エンジンのシリンダブロックを鋳造する時に使用す
る中子の従来例を示す図面、第3図はこの発明に係る中
子の平面図、第4図は第3図のI−1線断面図、第5図
はこの発明に係る中子により鋳造されたシリンダブロッ
クを示す横断面図、第6図は縦断面図、第7図及び第8
図はこの発明に係る中子に装着する補強部材の形状を示
す斜視図、第9図乃至第11図は第7図及ひ第8図に示
す補強部材の中子への装着状態を示す図面てある。
10・・・・・・中子、11・・・・・・冷却用通路を
形成する部分、12・・・・・・補強部材、13・・・
・シリンダ、14・・・・・・冷却用通路、15・・・
ウリンダプロツク。Fig. 1 is a partial sectional view showing a water-cooled engine, Fig. 2 is a drawing showing a conventional example of a core used when casting a cylinder block for a water-cooled engine, and Fig. 3 is a plan view of a core according to the present invention. 4 is a cross-sectional view taken along line I-1 in FIG. 3, FIG. 5 is a cross-sectional view showing a cylinder block cast using the core according to the present invention, FIG. 6 is a vertical cross-sectional view, and FIG. and the eighth
The figure is a perspective view showing the shape of the reinforcing member attached to the core according to the present invention, and FIGS. 9 to 11 are drawings showing how the reinforcing member shown in FIGS. 7 and 8 is attached to the core. There is. DESCRIPTION OF SYMBOLS 10... Core, 11... Part forming a cooling passage, 12... Reinforcement member, 13...
・Cylinder, 14...Cooling passage, 15...
Ulindaprotsk.
Claims (1)
ダ間にシリンダ配列方向の幅寸法を狭くした冷却用通路
を有し、各冷却用通路の上端又は下端に該通路を跨いで
鋳込み埋設された断面コ字形の金属製補強部材と、該補
強部材に一体化され、上記通路に沿つてシリンダ配列方
向と直交する方向の両側壁部分まで延長された中子変形
防止部片とを具備していることを特徴とするシリンダブ
ロック。 2 複数のシリンダボアを一列で等間隔に配列し、全体
を中子砂で角形ブロック状に形成され、各シリンダボア
間に薄肉の冷却用通路形成部分をもち、この部分の上端
又は下端に該部分を跨いで被嵌された断面コ字形の金属
製補強部材と、該補強部材に一体化され、上記通路形成
部分に沿つてシリンダボアの配列方向と直交する方向の
両側壁部分まで延長された中子変形防止部片とを有する
中子を母型鋳型内に配置して鋳造することを特徴とする
シリンダブロックの製造方法。[Scope of Claims] 1 A cooling passage surrounding a plurality of independent cylinders and having a narrow width dimension in the cylinder arrangement direction between each cylinder, with the passage at the upper end or lower end of each cooling passage. A metal reinforcing member having a U-shaped cross section is cast and buried across the core, and a core deformation preventing portion is integrated with the reinforcing member and extends along the passageway to both side wall portions in a direction orthogonal to the cylinder arrangement direction. A cylinder block characterized by comprising a piece. 2 A plurality of cylinder bores are arranged in a row at equal intervals, the whole is formed into a rectangular block shape with core sand, and there is a thin walled cooling passage forming part between each cylinder bore, and this part is attached to the upper or lower end of this part. A metal reinforcing member with a U-shaped cross section that is fitted over the reinforcing member, and a deformed core that is integrated with the reinforcing member and extends along the passage forming portion to both side wall portions in a direction perpendicular to the arrangement direction of the cylinder bores. 1. A method of manufacturing a cylinder block, comprising placing a core having a prevention piece in a master mold and casting.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9884279A JPS6047033B2 (en) | 1979-08-01 | 1979-08-01 | Cylinder block and its manufacturing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9884279A JPS6047033B2 (en) | 1979-08-01 | 1979-08-01 | Cylinder block and its manufacturing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5623345A JPS5623345A (en) | 1981-03-05 |
JPS6047033B2 true JPS6047033B2 (en) | 1985-10-19 |
Family
ID=14230501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9884279A Expired JPS6047033B2 (en) | 1979-08-01 | 1979-08-01 | Cylinder block and its manufacturing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6047033B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05342164A (en) * | 1992-05-21 | 1993-12-24 | Internatl Business Mach Corp <Ibm> | Information processing system with printing function |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH082477B2 (en) * | 1988-06-29 | 1996-01-17 | 日野自動車工業株式会社 | Core used for casting |
US5155548A (en) * | 1990-05-22 | 1992-10-13 | Litton Systems, Inc. | Passive fiber optic sensor with omnidirectional acoustic sensor and accelerometer |
US7513237B1 (en) * | 2006-06-16 | 2009-04-07 | Electromechanical Research Laboratories, Inc. | Engine and methods of manufacturing an engine with increased internal support |
-
1979
- 1979-08-01 JP JP9884279A patent/JPS6047033B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05342164A (en) * | 1992-05-21 | 1993-12-24 | Internatl Business Mach Corp <Ibm> | Information processing system with printing function |
Also Published As
Publication number | Publication date |
---|---|
JPS5623345A (en) | 1981-03-05 |
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