WO2013124983A1 - ウオータジャケット中子 - Google Patents
ウオータジャケット中子 Download PDFInfo
- Publication number
- WO2013124983A1 WO2013124983A1 PCT/JP2012/054259 JP2012054259W WO2013124983A1 WO 2013124983 A1 WO2013124983 A1 WO 2013124983A1 JP 2012054259 W JP2012054259 W JP 2012054259W WO 2013124983 A1 WO2013124983 A1 WO 2013124983A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water jacket
- core
- female screw
- pin insertion
- bore pin
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/12—Accessories
- B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
Definitions
- the present invention relates to an improvement of a water jacket core that forms a water jacket during casting on a cylinder block for a multi-cylinder engine in which a plurality of cylinder liners are arranged in a row.
- the cylinder block is manufactured by casting. In the case of a water-cooled engine, it is necessary to provide a water jacket on the cylinder block. This water jacket is formed simultaneously with the core during casting.
- the water jacket core is positioned in the radial direction by a bore pin and fixed to the casting mold with a bolt via a mounting flange integral with the bore pin (see, for example, Patent Document 1 and FIG. 1).
- FIG. 7 is a cross-sectional view for explaining a conventional water jacket core.
- a cavity 109 is formed by casting dies 97, 98, 99, and 100 for forming a cylinder block.
- a cylinder liner 101 is held on the outer periphery of the bore pin BP, and a water jacket core 102 is disposed so as to surround the cylinder liner 101, and the water jacket core 102 is fixed to the casting mold 100 with bolts 103.
- the water jacket core 102 includes a base portion 104 and a core main body portion 105 extending from the base portion 104.
- the shape of the base portion 104 of the water jacket core 102 will be described with reference to FIG.
- a plurality of holes 107 (four in this example) corresponding to the bore pins BP are formed on the bottom surface of the base portion 104, and a plurality of female screw portions 108 are provided so as to surround the holes 107.
- the tip of the bolt 103 shown in FIG. 7 is screwed into the female screw portion 108 and fixed to the casting mold 100.
- a molten aluminum is poured into the cavity 109, and when the molten metal hardens, a casting 111 of a cylinder block for a multi-cylinder engine is obtained.
- the present inventors examined the cause of the unfavorable deformation, and paid attention to the heat flow during the examination process.
- a part of the heat of the molten metal is transmitted from the core body part 105 to the base part 104, and is transmitted from the base part 104 to the casting mold 100. Furthermore, the flow of heat will be described with reference to FIG. 10. Heat flows from the base portion 104 to the casting mold 100 as indicated by arrows.
- water jacket core can be prevented from collapsing, stress can be prevented from concentrating on the core during product casting extrusion, and the mass production durability can be improved.
- This invention makes it a subject to provide the technique which prevents fall of a water jacket core and improves mass-production durability.
- a plurality of bore bores for forming a cylinder bore, a core body portion for forming a water jacket, a base portion having a plurality of the bore pin insertion holes, and the bore pin insertion holes are enclosed.
- the water jacket core provided with a plurality of female screw portions provided on the base portion, the bore pin insertion adjacent to the tangent line parallel to the center line passing through the center of the plurality of bore pin insertion holes and in contact with the bore pin insertion hole
- a water jacket core is provided in which an intermediate female thread portion is disposed in the base portion in a region surrounded by an intermediate position of the hole.
- the intermediate female screw portion is provided in a cooling hole formed in the core main body portion, and the core main body portion is made of a coolant injected from a liquid supply / recovery tool screwed into the intermediate female screw portion. It is preferable to perform forced cooling locally.
- a female screw portion (intermediate female screw portion) is also provided in the Y-shaped portion of the water jacket core.
- the female screw portion provided in this portion has a water cooling structure. As a result, it is possible to prevent thermal degradation of the female screw portion, and it is possible to increase the durability of the water jacket core.
- FIG. 2 is a sectional view taken along the line 2 in FIG. 1.
- FIG. 3 is a cross-sectional view taken along the line 3 in FIG. 1, showing a modification of the configuration in FIG. 2.
- FIG. 4 is an exploded view of the configuration of FIG. 3. It is sectional drawing which shows the effect
- FIG. 8 is a view on arrow 8-8 in FIG. 7. It is a figure explaining the malfunction matter in the conventional core. It is a figure explaining the flow of the heat in the conventional structure.
- the base portion 11 of the water jacket core 10 has a plurality of holes 12 (four in this example) corresponding to the cylinders, and a plurality of female screw portions 13 so as to surround the holes 12. , 15 are provided.
- the female screw portion 13 is provided outside the Y-shaped portion 16 formed between the adjacent holes 12 and 12, and the intermediate female screw portion 15 is provided in the Y-shaped portion 16. ing.
- the position of the intermediate female screw portion 15 is accurately expressed as follows.
- a center line 17 passing through the centers of the plurality of holes 12 is drawn.
- Two tangent lines 18 and 19 are drawn which are in contact with the plurality of holes 12 apart from the center line 17 by the radius of the hole 12.
- An orthogonal line 21 orthogonal to the center line 17 is drawn at an intermediate position between adjacent holes 12.
- the intermediate female screw portions 15 and 15 are provided in a region between the two tangents 18 and 19 and on the orthogonal line 21 at positions close to the tangents 18 and 19.
- the intermediate female screw portion 15 is provided at the tip of a bolt hole 24 formed from the base portion 11 side so as to hang from the base portion 11 to the core main body portion 22.
- the casting mold 25 is also provided with a bolt hole 26.
- the mounting hole provided in the flange portion BPF of the bore pin BP shown in the prior art and the bolt hole 24 of the base portion 11 are aligned with the bolt hole 26, and the intermediate portion is tightened from the casting mold 25 side via the washer 27.
- the base part 11 and the core body part 22 are fixed to the casting mold 25 by inserting the attaching bolt 28 and screwing the tip of the intermediate part fastening bolt 28 into the female thread part 13.
- FIG. 4 is an exploded view showing the structural component of the water cooling function of FIG.
- a bolt hole 24 is formed from the base portion 11 side from the base portion 11 to the core main body portion 22, and an intermediate female screw portion 15 is provided at the tip of the bolt hole 24.
- a cooling hole 29 is extended in the child main body 22.
- the bolt hole 24, the intermediate female screw part 15, and the cooling hole 29 are provided in the base part 11 and the core main body part 22 in this order in series.
- the liquid supply / recovery tool 30 for cooling is inserted into the bolt hole 24, the intermediate female screw portion 15, and the cooling hole 29.
- the liquid supply / recovery tool 30 is applied to the hollow bolt 31, the drainage ring 33 applied to the bolt head 32 of the hollow bolt 31, the drainage pipe 34 extending from the drainage ring 33, and the drainage ring 33.
- the intermediate female screw portion 15 and the screw portion 37 are fine screws in order to prevent water leakage.
- the plug 40 has a first through hole 42 through which the refrigerant supplied from the liquid supply ring 35 is sent to the cooling pipe 41.
- the base (plug 40 side) of the cooling pipe 41 is closed with a closing piece 43.
- a gap 44 is secured between the inner periphery of the tip of the plug 40 and the outer periphery of the cooling pipe 41, and the second through hole 45 is formed in the plug 40 so that the refrigerant passing through the gap 44 reaches the drainage ring 33. Is opened.
- annular groove 46 is provided in the liquid supply ring 35, and the coolant is caused to flow from the liquid supply pipe 36 to the first through hole 42 via the annular groove 46.
- annular groove 47 is provided in the drainage ring 33 so that the refrigerant flows into the drainage pipe 34 via the second through hole 45 and the annular groove 47.
- the warmed refrigerant moves outside the cooling pipe 41 toward the plug 40, passes through the hollow bolt 31, passes through the second through hole 45, and is discharged from the drain pipe 34.
- the core main body portion 22 and the intermediate female screw portion 15 are cooled by the liquid supply / recovery tool 30.
- the water jacket core 10 is fixed to the casting mold 25 with bolts 128, 128, and then the hollow bolts 31, 31 are located closer to the center line 17 than the bolts 128, 128.
- the water jacket core 10 is fixed to the casting mold 25.
- the base portion 11 is curved between the casting mold 25 and the base portion 11 in the vicinity of the center line 17, and the core body portions 22 and 22 are opened in a V shape. That is, a fall occurs.
- the intermediate female screw portion 15 is added with the intermediate female screw portions 15 and 15 at positions close to the center line 17 and tightened with the hollow bolts 31 and 31, respectively, the casting mold 25 and the base portion 11 There was no concern about the occurrence of a gap between them (because it was small even if it occurred), and the core main body portions 22 and 22 could be further prevented from falling.
- the intermediate female screw portion 15 is a pair of left and right, the number of the intermediate female screw portions 15 may be one or plural, and the bolts may have different sizes.
- the hollow bolt 31 can be replaced with a normal bolt if a thermal measure such as cooling the casting mold 25 is taken. That is, if the thermal problem is mild, an anhydrous cooling structure can be achieved.
- the intermediate female screw portion 15 provided in the Y-shaped portion 16 shown in FIG. 6 can be water-cooled. Further, with respect to the Y-shaped portion 16, if the intermediate female screw portion 15 is not provided, the outer peripheral line of the base portion 11 can be driven as indicated by an imaginary line. However, as in the present invention, the intermediate female screw portion 15 is moved to the Y-shaped portion. In the case of being provided at 16, the outer peripheral line of the base portion 11 can be expanded outward as shown by the solid line, and the area of the Y-shaped portion 16 can be increased to increase the rigidity.
- the water jacket core used for casting the cylinder block for a four-cylinder engine has been described.
- the number is arbitrary as long as the number of cylinders is two or more.
- the configuration of the liquid supply / recovery tool may be changed as appropriate.
- the present invention is suitable for a water jacket core used for casting a cylinder block for a multi-cylinder engine.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
図1に示すように、ウオータジャケット中子10のベース部11には、シリンダに対応する穴12が複数個(この例では4個)開けられ、この穴12を囲うように複数の雌ねじ部13、15が設けられている。
複数の穴12の中心を通る中心線17を描く。この中心線17から穴12の半径だけ離れて複数の穴12に接する、2本の接線18、19を描く。隣り合う穴12の中間位置にて中心線17に直交する直交線21を引く。中間雌ねじ部15、15は、2本の接線18、19で挟まれた領域内で、且つ直交線21上にて、接線18、19に近接した位置に設けられている。
図4に示すように、ベース部11から中子本体部22に掛けて、ベース部11側からボルト穴24が形成され、このボルト穴24の先に中間雌ねじ部15が設けられ、さらに、中子本体部22内に冷却穴29が延ばされている。
同様に、排液リング33内に環状溝47を設け、第2通孔45及び環状溝47を介して排液管34へ冷媒を流すようにした。
これらの構成要素を組み立てた形態が図3に示される。
そして、給液管36から冷媒(水など)が第1通孔42を通って冷却パイプ41内に供給されると、冷媒は冷却パイプ41内を先端に向かって移動し、冷却穴29を満たす。この冷媒は移動中に中子本体部22を冷却する。
このようにして、中間雌ねじ部15においては、液供給回収具30により、中子本体部22及び中間雌ねじ部15が冷却される。
本発明では、中間雌ねじ部15は、中心線17寄りの部位に各々中間雌ねじ部15、15を追加し、中空ボルト31、31で締め付けるようにしたので、鋳造金型25とベース部11との間に隙間が発生する心配が無く(発生したとしても僅かであるため)、中子本体部22、22の倒れを更に防止することができた。
中間雌ねじ部15は、左右一対としたが、数は1本でも複数でも良く、ボルトのサイズを異ならせても良い。
また、Y字部16については、中間雌ねじ部15が無ければ、ベース部11の外周線は想像線で示すように追い込むことができるが、本発明のように、中間雌ねじ部15をY字部16に設ける場合は、ベース部11の外周線は実線で示すように外側に拡げて、Y字部16の面積を増加し剛性を上げることも可能である。
また、液供給回収具の構成は、適宜変更することは差し支えない。
Claims (2)
- 複数のシリンダボア形成用ボアピン挿通穴と、
ウオータジャケット形成用の中子本体部と、
前記ボアピン挿通穴を複数有するベース部と、
前記ボアピン挿通穴を囲うようにして前記ベース部に複数個設けられる雌ねじ部と、
を備えるウオータジャケット中子において、
前記複数のボアピン挿通穴の中心を通る中心線に平行で前記ボアピン挿通穴に接する接線と隣り合う前記ボアピン挿通穴の中間位置とで囲まれた領域内の前記ベース部に、中間雌ねじ部が配設されていることを特徴とするウオータジャケット中子。 - 前記中間雌ねじ部は、前記中子本体部にくり抜き形成した冷却穴に設けられており、前記中間雌ねじ部に各々ねじ込んだ液供給回収具から注入する冷却液で前記中子本体部を局部的に強制冷却することができるようになっている、請求項1記載のウオータジャケット中子。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/381,343 US9211584B2 (en) | 2012-02-22 | 2012-02-22 | Water jacket core |
CN201280071669.9A CN104203451B (zh) | 2012-02-22 | 2012-02-22 | 水套芯 |
PCT/JP2012/054259 WO2013124983A1 (ja) | 2012-02-22 | 2012-02-22 | ウオータジャケット中子 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2012/054259 WO2013124983A1 (ja) | 2012-02-22 | 2012-02-22 | ウオータジャケット中子 |
Publications (1)
Publication Number | Publication Date |
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WO2013124983A1 true WO2013124983A1 (ja) | 2013-08-29 |
Family
ID=49005205
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/054259 WO2013124983A1 (ja) | 2012-02-22 | 2012-02-22 | ウオータジャケット中子 |
Country Status (3)
Country | Link |
---|---|
US (1) | US9211584B2 (ja) |
CN (1) | CN104203451B (ja) |
WO (1) | WO2013124983A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102017213542A1 (de) * | 2017-08-04 | 2019-02-07 | Bayerische Motoren Werke Aktiengesellschaft | Gießform sowie Verfahren zum Herstellen eines Kurbelgehäuses |
CN109261911A (zh) * | 2018-12-07 | 2019-01-25 | 东风商用车有限公司 | 发动机缸体铸造用芯撑及其应用工艺、所在组合芯 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59232654A (ja) * | 1983-06-17 | 1984-12-27 | Honda Motor Co Ltd | シリンダブロツクの製造方法 |
JPH02307658A (ja) * | 1989-05-24 | 1990-12-20 | Nissan Motor Co Ltd | シリンダブロックの製造方法 |
JPH06262295A (ja) * | 1993-03-16 | 1994-09-20 | Nissan Motor Co Ltd | 鋳造用金型の局部冷却構造 |
JP2012035312A (ja) * | 2010-08-10 | 2012-02-23 | Honda Motor Co Ltd | ウオータジャケット中子 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0554575B1 (en) * | 1992-01-06 | 1997-03-19 | Honda Giken Kogyo Kabushiki Kaisha | Cylinder block |
JP3514335B2 (ja) * | 1994-11-10 | 2004-03-31 | 本田技研工業株式会社 | シリンダブロックの成形用金型 |
JP2000199452A (ja) * | 1998-12-28 | 2000-07-18 | Ryobi Ltd | クロ―ズドデッキタイプシリンダブロック及びその製造方法 |
US6298899B1 (en) * | 1999-07-13 | 2001-10-09 | Ford Global Tech., Inc. | Water jacket core |
JP2001164985A (ja) | 1999-09-28 | 2001-06-19 | Kubota Corp | 多気筒エンジンのシリンダブロック及びその鋳造方法 |
KR100884070B1 (ko) * | 2006-11-21 | 2009-02-19 | 현대자동차주식회사 | 실린더블록 다이캐스팅 금형의 헤드 페이스 슬라이드 코어 |
-
2012
- 2012-02-22 CN CN201280071669.9A patent/CN104203451B/zh not_active Expired - Fee Related
- 2012-02-22 WO PCT/JP2012/054259 patent/WO2013124983A1/ja active Application Filing
- 2012-02-22 US US14/381,343 patent/US9211584B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59232654A (ja) * | 1983-06-17 | 1984-12-27 | Honda Motor Co Ltd | シリンダブロツクの製造方法 |
JPH02307658A (ja) * | 1989-05-24 | 1990-12-20 | Nissan Motor Co Ltd | シリンダブロックの製造方法 |
JPH06262295A (ja) * | 1993-03-16 | 1994-09-20 | Nissan Motor Co Ltd | 鋳造用金型の局部冷却構造 |
JP2012035312A (ja) * | 2010-08-10 | 2012-02-23 | Honda Motor Co Ltd | ウオータジャケット中子 |
Also Published As
Publication number | Publication date |
---|---|
US9211584B2 (en) | 2015-12-15 |
US20150041097A1 (en) | 2015-02-12 |
CN104203451A (zh) | 2014-12-10 |
CN104203451B (zh) | 2016-03-30 |
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