CN101618434B - Spark plug hole precast process for casting engine aluminum alloy cylinder cover by gravity - Google Patents
Spark plug hole precast process for casting engine aluminum alloy cylinder cover by gravity Download PDFInfo
- Publication number
- CN101618434B CN101618434B CN2009101627781A CN200910162778A CN101618434B CN 101618434 B CN101618434 B CN 101618434B CN 2009101627781 A CN2009101627781 A CN 2009101627781A CN 200910162778 A CN200910162778 A CN 200910162778A CN 101618434 B CN101618434 B CN 101618434B
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- China
- Prior art keywords
- core
- plug hole
- spark
- cylinder cover
- aluminum alloy
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 17
- 238000005266 casting Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000005484 gravity Effects 0.000 title abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000000630 rising effect Effects 0.000 claims description 17
- 230000013011 mating Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011797 cavity material Substances 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The invention relates to a spark plug hole precast process for casting an engine aluminum alloy cylinder cover by gravity, which can be effectively applied to spark plug hole precast processing for casting the engine aluminum alloy cylinder cover by the gravity. The invention adopts the technical scheme that: a water jacket sand core, an air way sand core, a riser sand core and a low-pressure oil way sand core of the cylinder cover are respectively loaded in a metal mould. The precast process is characterized in that a spark plug hole sand core is also arranged and loaded in the metal mould; then the mould is closed and poured; and after solidification, an obtained workpiece is taken out.
Description
Technical field
The present invention relates to a kind of spark-plug hole precast process of gravitational casting engine aluminum alloy cylinder cover.
Background technology
At present, the precast process manufacturing is all adopted in the spark-plug hole of external engine aluminum alloy cylinder cover, but this manufacture method only is applied to non-gravity casting techniques such as low pressure casting.
What domestic aluminum alloy cylinder cover adopted is gravity foundry technology, but spark-plug hole all is " solid " non-pre-casting.Foundry goods thick macrostructure herein will cause inevitable thermojunction in the casting process, thermojunction easily causes casting flaws such as the shrinkage cavity, shrinkage porosite, pore, grain-boundary crack of foundry goods, and can not guarantee the consecutive solidification of foundry goods, and grain-boundary crack makes product failure phenomenon occur probably, such as the profit mixing of foundry goods.
Summary of the invention
Goal of the invention of the present invention is to provide a kind of spark-plug hole precast process of gravitational casting engine aluminum alloy cylinder cover, can effectively be applicable to the spark-plug hole precasting processing of gravitational casting engine aluminum alloy cylinder cover.
Realize technical scheme of the present invention:
A kind of spark-plug hole precast process of gravitational casting engine aluminum alloy cylinder cover, cylinder cap sand core of water jacket, air flue core, rising head core and low pressure oil passage sand core is successively following respectively in metal die, it is characterized in that: also be provided with the spark-plug hole core, with under the spark-plug hole core in metal die, pickup is solidified in the matched moulds cast.
The core manufacturing craft of spark-plug hole core adopts precoated sand shell core or cold core box process.
The spark-plug hole core partly positions by core print.
Have the mating surface that is used for spark-plug hole core location on the rising head core.
Spark-plug hole core and rising head core compress by mating surface is bonding.
Utilize mating surface to guarantee the position degree and the perpendicularity of spark-plug hole core.
Rising head core and spark-plug hole core can be made integral sand core, utilize rising head core location down in metal die.
The spark-plug hole periphery leaves allowance, can be according to the structure needs design draft angle of foundry goods.
The beneficial effect that the present invention has:
The present invention compares with existing aluminum alloy cylinder cover gravity foundry technology, only needs to increase a spark-plug hole core and the rising head core is adjusted accordingly, and does not change the cavity filling process of existing technology, and technology is simple, be easy to promote.
The present invention has thoroughly solved casting flaws such as the shrinkage cavity, pore, slag inclusion of aluminum alloy cylinder cover spark-plug hole position; Owing to improved evenness of wall thickness, made the aluminum alloy cylinder cover gravity foundry technology can both realize consecutive solidification at different pouring positions; Simultaneously, significantly reduce secondary dendrite arm spacing, improve the mechanical property of aluminum alloy materials, the ability of antifatigue crackle.
Description of drawings
Fig. 1 is a spark-plug hole sand core structure schematic diagram;
Fig. 2 is spark-plug hole core and rising head core location structure schematic diagram.
The specific embodiment
In the normal order with under cylinder cap sand core of water jacket, the air flue core in metal die, again rising head core and low pressure oil passage sand core are positioned on the portal frame of front and back end mould after by concavo-convex anchor point positioning bonding.Again with under the spark-plug hole core in metal die, pickup is solidified in matched moulds cast.Also rising head core and spark-plug hole core can be made integral sand core according to product structure feature, utilize rising head core location down in metal die.
As shown in Figure 1, the spark-plug hole core adopts precoated sand shell core or cold core box process overall structure, and the spark-plug hole core positions by core print part 1.
As shown in Figure 2, have the mating surface that is used for spark-plug hole core location on the rising head core 2, spark-plug hole core and rising head core compress by mating surface is bonding, utilize mating surface to guarantee the position degree and the perpendicularity of spark-plug hole core.During designing cast, the spark-plug hole periphery leaves certain allowance, can be according to the structure needs design draft angle of foundry goods.
Claims (3)
1. the spark-plug hole precast process of a gravitational casting engine aluminum alloy cylinder cover, cylinder cap sand core of water jacket, air flue core, rising head core and low pressure oil passage sand core is successively following respectively in metal die, it is characterized in that: also be provided with the spark-plug hole core, with under the spark-plug hole core in metal die, pickup is solidified in the matched moulds cast; The core manufacturing craft of spark-plug hole core adopts precoated sand shell core or cold core box process, and the spark-plug hole core partly positions by core print; Have the mating surface that is used for spark-plug hole core location on the rising head core; Spark-plug hole core and rising head core compress by mating surface is bonding; Utilize mating surface to guarantee the position degree and the perpendicularity of spark-plug hole core.
2. the spark-plug hole precast process of gravitational casting engine aluminum alloy cylinder cover according to claim 1 is characterized in that: rising head core and spark-plug hole core are made integral sand core, utilize rising head core location down in metal die.
3. the spark-plug hole precast process of gravitational casting engine aluminum alloy cylinder cover according to claim 2 is characterized in that: the spark-plug hole periphery leaves allowance, according to the structure needs design draft angle of foundry goods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101627781A CN101618434B (en) | 2009-08-14 | 2009-08-14 | Spark plug hole precast process for casting engine aluminum alloy cylinder cover by gravity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101627781A CN101618434B (en) | 2009-08-14 | 2009-08-14 | Spark plug hole precast process for casting engine aluminum alloy cylinder cover by gravity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101618434A CN101618434A (en) | 2010-01-06 |
| CN101618434B true CN101618434B (en) | 2011-06-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101627781A Active CN101618434B (en) | 2009-08-14 | 2009-08-14 | Spark plug hole precast process for casting engine aluminum alloy cylinder cover by gravity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101618434B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817061B (en) * | 2010-05-17 | 2011-12-28 | 奇瑞汽车股份有限公司 | Sand core structure for precasting high-pressure oil channel of engine cylinder cover and precasting method |
| CN102641997A (en) * | 2012-04-16 | 2012-08-22 | 芜湖永裕汽车工业有限公司 | Water channel sand core of engine cylinder cover |
| CN103878318B (en) * | 2012-12-19 | 2016-01-27 | 上海爱仕达汽车零部件有限公司 | A kind of cylinder cap casting die and casting method |
| CN103878324B (en) * | 2012-12-19 | 2016-01-27 | 上海爱仕达汽车零部件有限公司 | A kind of cylinder cap casting die and casting method |
| CN103143684A (en) * | 2013-03-12 | 2013-06-12 | 洛阳古城机械有限公司 | Method for reducing casting defects of automobile engine air cylinder body |
-
2009
- 2009-08-14 CN CN2009101627781A patent/CN101618434B/en active Active
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| Publication number | Publication date |
|---|---|
| CN101618434A (en) | 2010-01-06 |
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