CN111069570A - Cylinder cover low-pressure pouring process of 180-degree turnover metal mold and pouring device thereof - Google Patents
Cylinder cover low-pressure pouring process of 180-degree turnover metal mold and pouring device thereof Download PDFInfo
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- CN111069570A CN111069570A CN202010100915.5A CN202010100915A CN111069570A CN 111069570 A CN111069570 A CN 111069570A CN 202010100915 A CN202010100915 A CN 202010100915A CN 111069570 A CN111069570 A CN 111069570A
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- Prior art keywords
- metal mold
- pressure
- low
- pouring
- cylinder cover
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 75
- 239000002184 metal Substances 0.000 title claims abstract description 75
- 230000007306 turnover Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 11
- 238000005266 casting Methods 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 claims abstract description 17
- 238000005429 filling process Methods 0.000 claims abstract description 4
- 210000001503 joint Anatomy 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000007711 solidification Methods 0.000 abstract description 5
- 230000008023 solidification Effects 0.000 abstract description 5
- 210000001787 dendrite Anatomy 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
Abstract
A cylinder cover low-pressure casting process of a 180-degree turnover metal mold and a casting device thereof are disclosed, wherein firstly, after the metal mold is turned over by 180 degrees up and down by an automatic turnover mechanism, the turnover metal mold is moved to the upper part of a low-pressure furnace by a conveying and propelling mechanism; the low-pressure furnace automatically rises to be in butt joint with the metal mold, and then low-pressure filling is carried out; the whole mold filling process is sequentially divided into: liquid lifting, mold filling, pressure boosting, pressure maintaining and pressure releasing; after pressure relief, the low-pressure furnace descends, the automatic turnover mechanism returns to the original position and then reversely overturns the metal mold for 180 degrees to return to the original position, the metal mold is opened, and a cylinder cover casting is taken out. The pouring device comprises: the metal mould is connected with an automatic turnover mechanism which is arranged on rails through a conveying and propelling mechanism, and a low-pressure furnace is arranged between the rails. The invention leads the bottom surface and the combustion chamber position to have lower temperature and relatively faster solidification when the cylinder cover is formed in the metal mold and corresponds to the upward combustion chamber surface and the downward spark plug column surface of the cylinder cover, so that the secondary dendrite spacing of the combustion chamber position meets the relevant requirements, thereby improving the quality of cylinder cover products.
Description
Technical Field
The invention relates to a cylinder cover low-pressure pouring process applying a metal mold and a pouring device thereof.
Background
With the development of science and technology and the progress of society, energy conservation and emission reduction gradually become the mainstream design concept of automobile engines, and the lightweight technology can be said to be the necessary condition of energy conservation and emission reduction of automobiles, so that the cylinder cover serving as a core part of the engine tends to be developed in the direction of low weight, small discharge capacity and high performance. The traditional cylinder cover low-pressure process is basically that the material is fed into the bottom surface or the side surface of a cylinder cover (namely the combustion chamber of the cylinder cover faces downwards, and a spark plug column faces upwards), so that the temperature of the bottom surface and the combustion chamber is high, the solidification is relatively slow, the secondary dendrite spacing of the combustion chamber is large, and the organizational performance of the combustion chamber is negatively influenced. Under the promotion of the innovation of the prior art, a casting process capable of meeting the requirements of cylinder covers with smaller wall thickness, more complex structures and higher performance requirements is urgently needed.
Disclosure of Invention
The invention aims to overcome the technical defects of larger grain size and larger secondary dendrite spacing on the surface of a combustion chamber of a cylinder cover in the traditional low-pressure process, and provides a cylinder cover low-pressure pouring process of a 180-degree turnover metal mold and a pouring device adopted by the cylinder cover low-pressure pouring process, wherein the temperature of the position of the cylinder cover corresponding to the combustion chamber is lower, and the solidification is relatively quick.
The purpose of the invention is realized by the following technical scheme: the cylinder cover low-pressure casting process of the 180-degree turnover metal mold comprises the following steps: firstly, closing the mold after placing the sand core at the corresponding position in the metal mold, turning the metal mold up and down by 180 degrees by an automatic turning mechanism, namely turning by 180 degrees, and moving the turned metal mold to the upper part of a low-pressure furnace by a conveying and propelling mechanism after the combustion chamber surface corresponding to a cylinder cover is upward and a spark plug column surface is downward; then, the low-pressure furnace automatically rises to be in butt joint with the metal mold, and then low-pressure charging is started; the whole mold filling process is sequentially divided into: a liquid lifting stage: the high-temperature aluminum liquid rises from a liquid lifting pipe on the low-pressure furnace to a pouring inlet of a pouring auxiliary body arranged at the bottom of the metal mold and enters a cross gate of the pouring auxiliary body; and (3) a mold filling stage: then, a horizontal pouring channel of the pouring auxiliary body reaches the top end of the metal mold from the bottom of the metal mold along an inner pouring gate of the horizontal pouring channel to perform mold filling; a pressurization stage; pressure maintaining stage; a pressure relief stage: after pressure relief, the low-pressure furnace descends, the automatic turnover mechanism returns to the original position and then reversely overturns the metal mold for 180 degrees to return to the original position, then the metal mold is opened, a cylinder cover casting in the metal mold is taken out, and the cavity of the metal mold is cleaned for next pouring operation.
The cylinder cover low-pressure pouring device of the 180-degree turnover metal mold adopted by the cylinder cover low-pressure pouring process of the 180-degree turnover metal mold comprises the metal mold, wherein the metal mold is connected with an automatic turnover mechanism, the automatic turnover mechanism is arranged on rails through a conveying and pushing mechanism, a low-pressure furnace is arranged between the rails, a lifting control mechanism is arranged below the low-pressure furnace, and the metal mold is positioned above the low-pressure furnace.
The low-pressure furnace is provided with a liquid lifting pipe, the bottom of the metal mold is provided with a casting auxiliary body butted with the liquid lifting pipe, the casting auxiliary body is internally provided with an inner pouring gate, a cross gate and an inlet pouring gate which are sequentially communicated, the inlet pouring gate of the casting auxiliary body is butted with the pipe orifice of the liquid lifting pipe, and the inner pouring gate of the casting auxiliary body is communicated with the bottom of the metal mold.
After the automatic turnover mechanism is adopted, the metal die is turned over by 180 degrees up and down by the automatic turnover mechanism, so that the bottom surface and the position of the combustion chamber are relatively low in temperature and relatively quick in solidification when the cylinder cover is formed in the metal die and the combustion chamber corresponding to the cylinder cover faces upwards and the spark plug faces downwards, and the secondary dendrite spacing of the position of the combustion chamber meets related requirements, so that the quality of a cylinder cover product is improved, and the automatic turnover mechanism is particularly suitable for cylinder covers with thin wall thicknesses, complex structures and high performance requirements.
Drawings
FIG. 1 is a schematic view of a cylinder head low-pressure casting process of a 180-degree turnover metal mold according to the invention.
Fig. 2 is a schematic structural view of a cylinder cover low-pressure casting device of a 180-degree turnover metal mold adopted by the invention.
Detailed Description
As shown in figures 1 and 2, the cylinder cover low-pressure casting process of the 180-degree turnover metal mold comprises the following steps: firstly, after sand cores are placed at corresponding positions in a metal mold (with a mold opening and closing mechanism), closing the mold, turning the metal mold 4 up and down by 180 degrees by an automatic turning mechanism 5 (namely, turning by 180 degrees, facing up corresponding to a combustion chamber of a cylinder cover and facing down corresponding to a spark plug column), and moving the turned metal mold 4 (which is two parallel rows along a track 7) to the position right above a low-pressure furnace 6 (in a crucible mode) by a conveying and propelling mechanism 8; then, a low-pressure furnace 6 (crucible type) automatically ascends to be in butt joint with the metal mold 4, and then low-pressure charging is started; the whole mold filling process is divided into five stages in sequence: (1) liquid rise phase (about 5 s): the high-temperature aluminum liquid rises from a liquid lifting pipe 3 on the low-pressure furnace to a pouring inlet 11 of a pouring auxiliary body 10 at the bottom of the metal mold and enters a cross pouring gate 2 of the metal mold; (2) filling stage (about 16 s): then, the pouring auxiliary body 10 is filled from the bottom of the metal mold (i.e. corresponding to the cylindrical surface of the spark plug of the cylinder head) to the top of the metal mold 4 (i.e. corresponding to the combustion chamber surface of the cylinder head) along the inner sprue 12 of the pouring auxiliary body 2; (3) a supercharging stage (supercharging speed of about 6Kpa/s, supercharging time of about 2 s); (4) a dwell phase (dwell pressure about 33Kpa, dwell time about 260 s); (5) pressure relief stage and solidification of cylinder cover casting: after pressure relief, the low-pressure furnace 6 descends, the automatic turnover mechanism 5 returns to the original position and then reversely overturns the metal mold for 180 degrees to return to the original position (namely the combustion chamber of the cylinder cover faces downwards), then the metal mold 4 is opened, the cylinder cover casting 1 in the metal mold is taken out, and the cavity of the metal mold is cleaned for next casting operation.
The cylinder cover low-pressure pouring device of the 180-degree turnover metal mold adopted by the cylinder cover low-pressure pouring process of the 180-degree turnover metal mold comprises a metal mold 4 (with a mold opening and closing mechanism), wherein the metal mold 4 is connected with an automatic turnover mechanism 5, the automatic turnover mechanism 5 is arranged on rails 7 (two parallel rails) through a conveying and pushing mechanism 8, a low-pressure furnace 6 (in a crucible type) is arranged between the rails 7, a lifting control mechanism 9 is arranged below the low-pressure furnace 6, and the metal mold 4 is positioned above the low-pressure furnace 6.
The low-pressure furnace 6 is provided with a liquid lifting pipe 3, the bottom of the metal mold 4 is provided with a casting auxiliary body 10 butted with the liquid lifting pipe 3, an inner pouring gate 12, a cross runner 2 and an inlet pouring gate 11 which are sequentially communicated are arranged in the casting auxiliary body 10, the inlet pouring gate 11 of the casting auxiliary body 10 is butted with the pipe orifice of the liquid lifting pipe 3, and the inner pouring gate 12 of the casting auxiliary body 10 is communicated with the bottom (corresponding to the cylindrical surface of a spark plug of a cylinder cover) of the metal mold 4.
Claims (3)
- The cylinder cover low-pressure pouring process of the 1.180-degree turnover metal mold is characterized in that: firstly, closing the mold after placing the sand core at the corresponding position in the metal mold, turning the metal mold up and down by 180 degrees by an automatic turning mechanism, namely turning by 180 degrees, and moving the turned metal mold to the upper part of a low-pressure furnace by a conveying and propelling mechanism after the combustion chamber surface corresponding to a cylinder cover is upward and a spark plug column surface is downward; then, the low-pressure furnace automatically rises to be in butt joint with the metal mold, and then low-pressure charging is started; the whole mold filling process is sequentially divided into: a liquid lifting stage: the high-temperature aluminum liquid rises from a liquid lifting pipe on the low-pressure furnace to a pouring inlet of a pouring auxiliary body arranged at the bottom of the metal mold and enters a cross gate of the pouring auxiliary body; and (3) a mold filling stage: then, a horizontal pouring channel of the pouring auxiliary body reaches the top end of the metal mold from the bottom of the metal mold along an inner pouring gate of the horizontal pouring channel to perform mold filling; a pressurization stage; pressure maintaining stage; a pressure relief stage: after pressure relief, the low-pressure furnace descends, the automatic turnover mechanism returns to the original position and then reversely overturns the metal mold for 180 degrees to return to the original position, then the metal mold is opened, a cylinder cover casting in the metal mold is taken out, and the cavity of the metal mold is cleaned for next pouring operation.
- 2. The cylinder cover low-pressure pouring device of the 180-degree turnover metal mold adopted in the cylinder cover low-pressure pouring process of the 180-degree turnover metal mold according to claim 1 comprises a metal mold and is characterized in that: the metal mold is connected with an automatic turnover mechanism, the automatic turnover mechanism is arranged on rails through a conveying and pushing mechanism, a low-pressure furnace is arranged between the rails, a lifting control mechanism is arranged below the low-pressure furnace, and the metal mold is positioned above the low-pressure furnace.
- 3. The cylinder cover low-pressure pouring device of the 180-degree turnover metal mold as claimed in claim 2, wherein: the low-pressure furnace is provided with a liquid lifting pipe, the bottom of the metal mold is provided with a casting auxiliary body butted with the liquid lifting pipe, the casting auxiliary body is internally provided with an inner pouring gate, a cross gate and an inlet pouring gate which are sequentially communicated, the inlet pouring gate of the casting auxiliary body is butted with the pipe orifice of the liquid lifting pipe, and the inner pouring gate of the casting auxiliary body is communicated with the bottom of the metal mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010100915.5A CN111069570A (en) | 2020-02-02 | 2020-02-02 | Cylinder cover low-pressure pouring process of 180-degree turnover metal mold and pouring device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010100915.5A CN111069570A (en) | 2020-02-02 | 2020-02-02 | Cylinder cover low-pressure pouring process of 180-degree turnover metal mold and pouring device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111069570A true CN111069570A (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010100915.5A Pending CN111069570A (en) | 2020-02-02 | 2020-02-02 | Cylinder cover low-pressure pouring process of 180-degree turnover metal mold and pouring device thereof |
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| CN (1) | CN111069570A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09174195A (en) * | 1995-12-26 | 1997-07-08 | Mitsubishi Motors Corp | Device for supporting core |
| JPH09174196A (en) * | 1995-12-26 | 1997-07-08 | Mitsubishi Motors Corp | Metallic mold for casting cylinder head |
| CN101954476A (en) * | 2010-08-31 | 2011-01-26 | 温州瑞明工业股份有限公司 | Metal formed die gravity tilt casting process of aluminum alloy cylinder cover |
| CN201960112U (en) * | 2011-03-24 | 2011-09-07 | 重庆长安汽车股份有限公司 | Low-pressure casting system for engine cylinder heads |
| CN103831419A (en) * | 2012-11-26 | 2014-06-04 | 现代自动车株式会社 | Casting apparatus for cylinder head and heat treatment method for cylinder head |
| CN104308081A (en) * | 2014-10-21 | 2015-01-28 | 沈阳铸造研究所 | Method for V-method shaping anti-gravity pouring of aluminum alloy casting |
| CN205309268U (en) * | 2015-12-22 | 2016-06-15 | 浙江跃岭股份有限公司 | Low -pressure casting machine |
| CN107614151A (en) * | 2015-05-29 | 2018-01-19 | 日产自动车株式会社 | The casting device of cylinder head and the casting method of cylinder head |
| CN109311085A (en) * | 2016-06-08 | 2019-02-05 | 日产自动车株式会社 | Low pressure casting mold |
| CN208680491U (en) * | 2018-07-04 | 2019-04-02 | 广州聚散流沙科技有限公司 | A kind of low pressure casting die of automobile cylinder cover |
-
2020
- 2020-02-02 CN CN202010100915.5A patent/CN111069570A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09174195A (en) * | 1995-12-26 | 1997-07-08 | Mitsubishi Motors Corp | Device for supporting core |
| JPH09174196A (en) * | 1995-12-26 | 1997-07-08 | Mitsubishi Motors Corp | Metallic mold for casting cylinder head |
| CN101954476A (en) * | 2010-08-31 | 2011-01-26 | 温州瑞明工业股份有限公司 | Metal formed die gravity tilt casting process of aluminum alloy cylinder cover |
| CN201960112U (en) * | 2011-03-24 | 2011-09-07 | 重庆长安汽车股份有限公司 | Low-pressure casting system for engine cylinder heads |
| CN103831419A (en) * | 2012-11-26 | 2014-06-04 | 现代自动车株式会社 | Casting apparatus for cylinder head and heat treatment method for cylinder head |
| CN104308081A (en) * | 2014-10-21 | 2015-01-28 | 沈阳铸造研究所 | Method for V-method shaping anti-gravity pouring of aluminum alloy casting |
| CN107614151A (en) * | 2015-05-29 | 2018-01-19 | 日产自动车株式会社 | The casting device of cylinder head and the casting method of cylinder head |
| CN205309268U (en) * | 2015-12-22 | 2016-06-15 | 浙江跃岭股份有限公司 | Low -pressure casting machine |
| CN109311085A (en) * | 2016-06-08 | 2019-02-05 | 日产自动车株式会社 | Low pressure casting mold |
| CN208680491U (en) * | 2018-07-04 | 2019-04-02 | 广州聚散流沙科技有限公司 | A kind of low pressure casting die of automobile cylinder cover |
Non-Patent Citations (1)
| Title |
|---|
| 陈正等, 中国矿业大学出版社 * |
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Application publication date: 20200428 |