JPS649902B2 - - Google Patents
Info
- Publication number
- JPS649902B2 JPS649902B2 JP2321185A JP2321185A JPS649902B2 JP S649902 B2 JPS649902 B2 JP S649902B2 JP 2321185 A JP2321185 A JP 2321185A JP 2321185 A JP2321185 A JP 2321185A JP S649902 B2 JPS649902 B2 JP S649902B2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical member
- reinforcing agent
- thermal expansion
- cylinder block
- metal
- 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
- 239000012744 reinforcing agent Substances 0.000 claims description 19
- 238000005266 casting Methods 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 239000010953 base metal Substances 0.000 claims description 11
- 239000004576 sand Substances 0.000 claims description 5
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 description 7
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 102000011782 Keratins Human genes 0.000 description 1
- 108010076876 Keratins Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Casting Devices For Molds (AREA)
Description
Ａ 発明の目的
(1) 産業上の利用分野
本発明は、鋳造時に母材金属に鋳ぐるまれ、シ
リンダブロツクの各シリンダボア間に通路を形成
するためのケレンに関する。
(2) 従来の技術
従来、かかるケレンは、特公昭56―42744号な
どで知られている。
(3) 発明が解決しようとする課題
上記従来の技術では、扁平な中空ケレンを母材
金属に鋳ぐるんで、相隣るシリンダボア間の薄肉
隔壁部に冷却水通路を形成するようにしている。
ところが、中空ケレンの肉厚が厚すぎる（たとえ
ば1.0mm以上）と、その熱容量が比較的大である
ことに起因して母材金属との溶着性が劣り、中空
ケレンおよび母材金属間に間〓が生じて断熱空間
となり、シリンダボア間の隔壁部の冷却機能の低
下を来すとともに、同隔壁部の強度低下を生じ
る。また中空ケレンの肉厚が薄すぎる（たとえば
0.7mm以下）と、母材金属との溶着性は良好とな
るが、ケレン自体の強度が低下して、ケレンの変
形や溶融を生じ易くなり、冷却水通路を確実に形
成することが困難となる。
本発明は、かかる事情に鑑みてなされたもので
あり、母材金属との溶着性を向上すべく薄肉にし
てもケレン強度の低下がなく、冷却水通路を確実
に形成し得るケレンを提供することを目的とす
る。
Ｂ 発明の構成
(1) 課題を解決するための手段
本発明のケレンは、金属製管を扁平に成形して
なる筒状部材と、この筒状部材内に鋳造後に除去
可能に充填され、鋳造時における溶湯圧力による
該筒状部材の変形を阻止し且つ該筒状部材と略同
等の熱膨脹曲線を示す補強剤とより構成される。
(2) 作 用
扁平筒状部材はそれが薄肉であつても、補強剤
の補強効果によつて強度低下が補われるので溶湯
圧力による変形が阻止され、しかも筒状部材およ
び補強剤の熱膨脹曲線が略同等であるので、鋳造
時における筒状部材の急激な熱膨脹のために筒状
部材および補強剤間に間〓が生じるのを未然に防
止することができる。従つて筒状部材は、鋳造時
における変形、溶融を回避しながら、極めて薄肉
に形成することが可能となり、この薄肉化によつ
て母材金属との溶着性が向上する。
(3) 実施例
以下、図面により本発明の一実施例について説
明すると、先ず第１図において、ケレン１は、鋳
砂を焼成して形成されたシリンダブロツク中子２
に埋設されており、このシリンダブロツク中子２
をシリンダブロツク主型３内に位置決め配置し
て、シリンダブロツク中子２およびシリンダブロ
ツク主型３間に溶湯４が重力あるいは加圧注湯さ
れる。溶湯４を冷却した後に、シリンダブロツク
中子２を除去することにより、シリンダブロツク
の鋳造が完了するが、このシリンダブロツク内に
ケレン１の筒状部材５は鋳ぐるまれたままであ
り、これにより各シリンダボア間の壁部に冷却水
通路が形成される。
第２図において、ケレン１は筒状部材５内に、
溶湯圧力による該筒状部材５の変形を防止する補
強剤６が充填されて成る。筒状部材５は扁平筒状
であり、薄肉の金属製管、たとえば肉厚0.6mmの
機械構造用炭素鋼継目無鋼管をプレス機などによ
り圧縮することにより形成される。補強剤６とし
ては、たとえば96％以上のSiO2を含む硅砂が用
いられる。このSiO2を96％以上含む硅砂は、第
３図で示すように機械構造用炭素鋼の熱膨脹曲線
Ａとほぼ同等の熱膨脹曲線Ｂを示すものである。
また参考までにSiO2を95％含む硅砂の熱膨脹曲
線ＣおよびZr砂の熱膨脹曲線Ｄは機械構造用炭
素鋼の熱膨脹曲線Ａよりも低い値を示す。
次にこの実施例の作用について説明すると、第
１図で示したように、シリンダブロツク中子２を
シリンダブロツク主型３内に位置決め配置して、
両者間に溶湯４を加圧注湯する。このとき筒状部
材５は扁平薄肉であるにも拘らず、補強剤６で十
分補強されていることにより、溶湯４の押圧力に
よる筒状部材５の変形が防止される。また肉厚が
薄いことに起因して、筒状部材５は急激に熱膨脹
するが、補強剤６と筒状部材５とはその熱膨脹曲
線が略同等のものであるので、筒状部材５および
補強剤６間に間〓が生じることが回避され、これ
によつても筒状部材５の変形、溶損が防止され
る。
このようにして、ケレン１の筒状部材５は鋳造
時の変形、溶損を回避しつつその薄肉化を図るこ
とができるから、その薄肉化によつて母材金属と
の溶着性を良好にして的確に鋳ぐるまれる。そし
て鋳造後は、筒状部材５内の補強剤６を除去する
ことにより、その跡に冷却通路が閉塞することな
く確実に形成される。
次に、筒状部材の仕様、筒状部材の肉厚、補強
剤の種類を変化させて、シリンダブロツクの鋳造
実験を行ない、母材との溶着、筒状部材の変形、
溶損および冷却水通路の良否を検討した結果を次
表に示す。
A. Object of the Invention (1) Field of Industrial Application The present invention relates to a groove that is cast into a base metal during casting and is used to form passages between cylinder bores of a cylinder block. (2) Prior Art Conventionally, such a keren has been known from Japanese Patent Publication No. 42744/1983. (3) Problems to be Solved by the Invention In the above-mentioned conventional technology, a flat hollow groove is cast into the base metal to form a cooling water passage in a thin wall between adjacent cylinder bores.
However, if the wall thickness of the hollow core is too thick (for example, 1.0 mm or more), its heat capacity is relatively large, resulting in poor weldability with the base metal, resulting in a gap between the hollow core and the base metal. This creates an adiabatic space, which reduces the cooling function of the partition wall between the cylinder bores and reduces the strength of the partition wall. Also, the wall thickness of the hollow keren is too thin (for example,
0.7mm or less), the weldability with the base metal is good, but the strength of the burr itself decreases, making it more likely to deform or melt, making it difficult to form cooling water passages reliably. Become. The present invention has been made in view of the above circumstances, and provides a keratin that can be made thinner in order to improve weldability with the base metal without reducing the denting strength and that can reliably form cooling water passages. The purpose is to B. Structure of the Invention (1) Means for Solving the Problems The present invention includes a cylindrical member formed by flattening a metal tube, a cylindrical member filled in the cylindrical member so as to be removable after casting, The reinforcing agent prevents deformation of the cylindrical member due to the pressure of the molten metal and exhibits a thermal expansion curve substantially the same as that of the cylindrical member. (2) Effects Even if the flat cylindrical member is thin, the reduction in strength is compensated for by the reinforcing effect of the reinforcing agent, so deformation due to molten metal pressure is prevented, and the thermal expansion curve of the cylindrical member and the reinforcing agent is Since they are substantially the same, it is possible to prevent gaps between the cylindrical member and the reinforcing agent due to rapid thermal expansion of the cylindrical member during casting. Therefore, the cylindrical member can be formed extremely thin while avoiding deformation and melting during casting, and this thinning improves weldability with the base metal. (3) Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, in FIG.
This cylinder block core 2
is positioned within the cylinder block main mold 3, and the molten metal 4 is poured by gravity or under pressure between the cylinder block core 2 and the cylinder block main mold 3. After the molten metal 4 is cooled, the cylinder block core 2 is removed to complete the casting of the cylinder block, but the cylindrical member 5 of the keren 1 remains cast inside the cylinder block. A cooling water passage is formed in the wall between the cylinder bores. In FIG. 2, the cover 1 is placed inside the cylindrical member 5.
The cylindrical member 5 is filled with a reinforcing agent 6 to prevent deformation of the cylindrical member 5 due to the pressure of the molten metal. The cylindrical member 5 has a flat cylindrical shape and is formed by compressing a thin-walled metal tube, for example, a carbon steel seamless steel tube for machine structures with a wall thickness of 0.6 mm, using a press machine or the like. As the reinforcing agent 6, for example, silica sand containing 96% or more of SiO 2 is used. This silica sand containing 96% or more of SiO 2 exhibits a thermal expansion curve B that is almost the same as the thermal expansion curve A of carbon steel for mechanical structures, as shown in FIG.
For reference, the thermal expansion curve C of silica sand containing 95% SiO 2 and the thermal expansion curve D of Zr sand show lower values than the thermal expansion curve A of carbon steel for mechanical structures. Next, the operation of this embodiment will be explained. As shown in FIG. 1, the cylinder block core 2 is positioned and arranged inside the cylinder block main mold 3,
Molten metal 4 is poured between the two under pressure. At this time, although the cylindrical member 5 is flat and thin, it is sufficiently reinforced with the reinforcing agent 6, so that deformation of the cylindrical member 5 due to the pressing force of the molten metal 4 is prevented. Further, due to the thin wall thickness, the cylindrical member 5 undergoes rapid thermal expansion, but since the reinforcing agent 6 and the cylindrical member 5 have substantially the same thermal expansion curves, the cylindrical member 5 and the reinforcement The occurrence of gaps between the agents 6 is avoided, and thereby the cylindrical member 5 is prevented from deformation and melting damage. In this way, the cylindrical member 5 of the keren 1 can be made thinner while avoiding deformation and melting damage during casting, and by making the wall thinner, better weldability with the base metal can be achieved. It is precisely molded. After casting, by removing the reinforcing agent 6 inside the cylindrical member 5, a cooling passage is reliably formed in its place without being blocked. Next, we conducted a cylinder block casting experiment by changing the specifications of the cylindrical member, the wall thickness of the cylindrical member, and the type of reinforcing agent.Welding with the base material, deformation of the cylindrical member,
The following table shows the results of examining the corrosion damage and the quality of the cooling water passages.
【表】
この表から明らかなように、薄肉の金属製継目
無管を圧縮して筒状部材を形成し、補強剤を筒状
部材とほぼ同等の熱膨脹曲線を示すものとしたと
きに、母材との溶着が向上するとともに筒状部材
の変形、溶損を避けることができ、確実な冷却水
通路を形成することができる。
Ｃ 発明の効果
以上のように本発明によれば、鋳造時に母材金
属に鋳ぐるまれ、シリンダブロツクの各シリンダ
ボア間に通路を形成するためのケレンは、金属製
管を扁平に成形してなる筒状部材と、この筒状部
材内に鋳造後に除去可能に充填され、鋳造時にお
ける溶湯圧力による該筒状部材の変形を阻止し且
つ該筒状部材と略同等の熱膨脹曲線を示す補強剤
とより構成されるので、扁平筒状部材は、それが
薄肉であつても、上記補強剤の補強効果によつて
強度低下を十分に補うことができて溶湯圧力によ
る変形が阻止され、その上、該筒状部材と補強剤
の熱膨脹曲線を略同等としたことによつて、鋳造
工程での筒状部材の急激な熱膨脹に起因して該部
材と補強剤間に間〓が生じるのを未然に防止する
ことができ、以上の結果、筒状部材は鋳造時にお
ける変形、溶損を回避しながら極めて薄肉に形成
することができるようになり、この薄肉化によつ
て母材金属との溶着性が大いに向上し、シリンダ
ボア間の隔壁部の冷却性向上及び強度アツプに寄
与し得る。
また上記補強剤は鋳造後に筒状部材内より除去
することができるから、その除去した跡に冷却水
通路を支障なく形成することができる。[Table] As is clear from this table, when a thin-walled metal seamless pipe is compressed to form a cylindrical member, and the reinforcing agent has a thermal expansion curve almost the same as that of the cylindrical member, the matrix It is possible to improve welding with the material, avoid deformation and melt damage of the cylindrical member, and form a reliable cooling water passage. C. Effects of the Invention As described above, according to the present invention, the grooves, which are cast into the base metal during casting and are used to form passages between each cylinder bore of the cylinder block, are formed by forming a metal tube into a flat shape. a cylindrical member; and a reinforcing agent that is removably filled into the cylindrical member after casting, prevents deformation of the cylindrical member due to molten metal pressure during casting, and exhibits a thermal expansion curve substantially the same as that of the cylindrical member; Therefore, even if the flat cylindrical member is thin, the reduction in strength can be sufficiently compensated for by the reinforcing effect of the reinforcing agent, and deformation due to the pressure of the molten metal is prevented. By making the thermal expansion curves of the cylindrical member and the reinforcing agent approximately the same, it is possible to prevent gaps from occurring between the cylindrical member and the reinforcing agent due to rapid thermal expansion of the cylindrical member during the casting process. As a result of the above, the cylindrical member can be formed with an extremely thin wall while avoiding deformation and melting loss during casting, and this thinning allows for improved weldability with the base metal. This greatly improves the cooling performance and strength of the partition wall between the cylinder bores. Further, since the reinforcing agent can be removed from the inside of the cylindrical member after casting, a cooling water passage can be formed without any problem in the area where the reinforcing agent has been removed.
図面は本発明の一実施例を示すものであり、第
１図はシリンダブロツク中子およびシリンダブロ
ツク主型間に溶湯を注湯した状態を示す横断面
図、第２図はケレンの斜視図、第３図は各材料の
熱膨脹曲線を示すグラフである。
１……ケレン、５……筒状部材、６……補強
剤。
The drawings show one embodiment of the present invention, and FIG. 1 is a cross-sectional view showing a state in which molten metal is poured between the cylinder block core and the cylinder block main mold, and FIG. 2 is a perspective view of the cylinder block. FIG. 3 is a graph showing thermal expansion curves of each material. 1... Keren, 5... Cylindrical member, 6... Reinforcement agent.
Claims (1)
ロツクの各シリンダボア間に通路を形成するため
のケレンにおいて、金属製管を扁平に成形してな
る筒状部材と、この筒状部材内に鋳造後に除去可
能に充填され、鋳造時における溶湯圧力による該
筒状部材の変形を阻止し且つ該筒状部材と略同等
の熱膨脹曲線を示す補強剤とより構成されること
を特徴とする、ケレン。 ２ 前記筒状部材は機械構造用炭素鋼鋼管から成
り、前記補強剤はSiO2が96％以上の硅砂である
特許請求の範囲第１項記載のケレン。 ３ 前記金属製管が継目無管である特許請求の範
囲第１項記載のケレン。[Scope of Claims] 1. A cylindrical member formed by forming a metal tube into a flat shape in a shank that is cast into a base metal during casting to form a passage between each cylinder bore of a cylinder block, and this tube. The reinforcing agent is removably filled into the cylindrical member after casting, prevents deformation of the cylindrical member due to molten metal pressure during casting, and exhibits a thermal expansion curve substantially the same as that of the cylindrical member. That's Keren. 2. The keren according to claim 1, wherein the cylindrical member is made of a carbon steel pipe for mechanical structure, and the reinforcing agent is silica sand containing 96% or more of SiO 2 . 3. The pipe according to claim 1, wherein the metal pipe is a seamless pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2321185A JPS61182848A (en) | 1985-02-08 | 1985-02-08 | Chaplet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2321185A JPS61182848A (en) | 1985-02-08 | 1985-02-08 | Chaplet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61182848A JPS61182848A (en) | 1986-08-15 |
| JPS649902B2 true JPS649902B2 (en) | 1989-02-20 |
Family
ID=12104324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2321185A Granted JPS61182848A (en) | 1985-02-08 | 1985-02-08 | Chaplet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61182848A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01258844A (en) * | 1988-04-07 | 1989-10-16 | Kiriyuu Kikai Kk | Water jacket core for cylinder block |
| FR2885061B1 (en) * | 2005-04-29 | 2007-07-27 | Peugeot Citroen Automobiles Sa | SINK ETAN FOR CASTER CYLINDER CAST IRON |
-
1985
- 1985-02-08 JP JP2321185A patent/JPS61182848A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61182848A (en) | 1986-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101547760B (en) | Casting mould for casting a cast part and use of such a casting mould | |
| US5415219A (en) | Grid casting mold for the casting of lead grids for accumulators and methods for its manufacture | |
| AU756341B2 (en) | Crystalliser for continuous casting | |
| US20050247428A1 (en) | Method and apparatus for casting aluminum engine blocks with cooling liquid passage in ultra thin interliner webs | |
| JPS649902B2 (en) | ||
| JP3001063B2 (en) | Plate-formed ingot mold for continuous casting of metal | |
| US6474401B1 (en) | Continuous casting mold | |
| US6415848B1 (en) | Metal mold arrangement for producing cylinder block | |
| CA1166423A (en) | Method of recalibrating a worn conical, especially curved tubular mold | |
| JPH11291017A (en) | Aluminum cast product and production thereof | |
| JP3228463B2 (en) | Long nozzle for continuous casting | |
| JPS6027558Y2 (en) | Continuous casting mold | |
| JPH01110861A (en) | Die cast engine block | |
| JP3293380B2 (en) | Engine cylinder block and method of manufacturing the same | |
| JPH08132210A (en) | Mold for molding cylinder block | |
| JPH1026050A (en) | Manufacturing method of cylinder block | |
| RU2185926C1 (en) | Core for obtaining hollow ingots and castings | |
| GB2318314A (en) | Continuous casting mould with a coating of varying thickness | |
| JP3267909B2 (en) | Long nozzle for continuous casting | |
| JPH08206801A (en) | Heat insulation method for finally solidified part in large cross sectional continuously cast bloom | |
| JPH077010Y2 (en) | Die casting sleeve | |
| US4901906A (en) | Method for forming composite metal articles | |
| JPH01110862A (en) | Die cast engine block | |
| JPH09242598A (en) | Cylinder block insert member and method for manufacturing cylinder block | |
| JPS63295043A (en) | Runner in bottom plate for bottom pouring ingot making |