CN207508248U - The casting dead head structure of upper end face closure casting - Google Patents
The casting dead head structure of upper end face closure casting Download PDFInfo
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- CN207508248U CN207508248U CN201721595593.6U CN201721595593U CN207508248U CN 207508248 U CN207508248 U CN 207508248U CN 201721595593 U CN201721595593 U CN 201721595593U CN 207508248 U CN207508248 U CN 207508248U
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- running channel
- casting
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- riser
- gap
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Abstract
The utility model discloses a kind of casting dead head structure of upper end face closure casting, solves the unreasonable interior tissue index for leading to not meet casting of the molding dead head structure of the low counter-pressure casting of aluminium alloy of upper end face closure casting and the technical issues of surface specification does not reach requirement.Including cross gate（1）, sprue（2）With side wall gap running channel（3）, in two side gap running channel（3）Between setting have the gap running channel formula riser（4）, gap running channel formula riser by lower section gap running channel sealing（5）With the molten metal memory block of top（6）Composition, molten metal memory block（6）Pass through gap running channel sealing and side wall gap running channel（3）It is connected together.In two gap running channel formula riser（4）Between be provided with chill（7）.The utility model is that the function of gap running channel and riser is combined as a whole, solve upper surface enclosuring structure part using poor, low pressure casting process there are the defects of, structural member cast qualification rate be increased to more than 95%.
Description
Technical field
The present invention relates to a kind of low counter-pressure casting of aluminium alloy, the low difference of aluminium alloy of more particularly to a kind of upper end face closure casting
Press the dead head structure and construction method of casting and forming.
Background technology
Aluminium alloy is low, in counter-pressure casting forming process, some structural member upper surfaces being cast are closings, and
The area of the upper surface of closing is larger, and upper surface still falls within important bearing position, and every foundry engieering index request is higher,
It is required that after casting and forming, interior tissue does not allow that there are shrinkage cavity and porosity, stomata, scattered porosity, pin hole, coarse grains and segregations
Etc. casting flaws, wherein mechanical property requirements：σ b >=300MPa, σ0.2>=260MPa, δ5>=5%, intensity centrifugal pump≤8%, extension
Rate centrifugal pump≤30%；Surface quality requirements：Inner and outer surfaces do not allow blackspot occur after anodic oxidation（Needle-shaped, linear, aberration）
Defect.For the higher structural casting of this index request, poor, pressure casting forming method is typically used to carry out molding,
Specifically cast structure is：In a number of gap running channel of the side wall array of casting, inside upper surface, i.e. sand core surface is put
Chill is put, a certain number of blocky riser are set outside upper surface.But after casting and forming, by structural member ontology mechanical property
Can detect has 65% or so numerical value that cannot meet above-mentioned design requirement；For casting after the flaw detection of " X " light, big plane locally lies in dispersion
Loose phenomenon；There are bulk blackspot, needle-shaped stain, aberration casting flaws for casting anodic oxidation rear surface.Reason is analyzed, due to quilt
The upper surface of the structural member of casting is close-shaped, during casting and forming, only relies on the gap running channel and block of casting side wall
Shape riser cannot promote the temperature field at big plane position during solidification to reach uniform state, cast product surface layer can be caused to generate element rich
Collection, areal concentration change, and cast-internal can generate scattered porosity and influence surface quality and mechanical property when serious.Separately
Outside, temperature gradient changes greatly during the solidification of big plane, and setting rate differs greatly, and can generate serious superheating phenomenon, in casting
There is scattered porosity in portion, and the casting flaws such as shrinkage porosite, shrinkage cavity are will appear when serious, influences upper surface mechanical properties value.Analysis is recognized
For gap running channel arrangement particularly dead head structure, influence whether the mobility of aluminium alloy liquid, be that generation is loose（It is dredged containing micro-
Pine）, hot and cold crackle, the principal element of casting flaws such as segregation and be easy to cause structural member stress concentration, severe exacerbation knot
The mechanical property of component.
Invention content
The present invention provides the casting dead head structures and its construction method of a kind of upper end face closure casting, solve in upper end
In the low counter-pressure casting forming process of aluminium alloy of face closure casting, dead head structure is unreasonable to be easy to cause structural member stress concentration
Technical problem.
Compared with other cast shaping process, use is low, counter-pressure casting moulding process is produced aluminum alloy junction component
Mechanical property, interior tissue value are more excellent, but using the technological forming end face it is larger, and it is upper sealing be closing structural casting when,
The characteristics of due to counter-pressure casting technique, cannot carry out effective feeding to transverse plane on casting, will appear inside structural member shrinkage porosite,
Shrinkage cavity, dispersed is loose, tissue is coarse, element segregation and mechanical property Mass are worth the defects of larger, and the present invention designs a kind of seam
Pressure is acted on down the aluminium alloy liquid gone up through gap running channel and stored, and equably feeding is arrived by gap running channel formula riser
On the upper surface of casting, upper surface enclosuring structure part is overcome casting process cannot carry out effective feeding the defects of, especially
It is to solve that its mechanical property, case hardness be uneven and that surface occurs is needle-shaped, linear, bulk aberration is inconsistent lacks
It falls into.
The present invention is to solve more than technical problem by the following technical programs：
A kind of casting dead head structure of upper end face closure casting, including cross gate, sprue and side wall gap running channel, two
Setting has the gap running channel formula riser between the running channel of side wall gap, and gap running channel formula riser is by the gap running channel sealing of lower section and top
Molten metal memory area group into molten metal memory block is connected together with side wall gap running channel.
Chill is provided between two gap running channel formula riser；Arrangement of the gap running channel formula riser on casting upper surface
Spacing is 160-190 millimeters, and molten metal memory block thickness is 4-5 times of casting upper end face thickness, and gap running channel formula emits dispute
Width is 0.8-1.2 times of casting upper end face thickness, and side and the side wall of the chill placed between two gap running channel formula riser stitch
The distance of gap running channel is 30-40 millimeters.
The construction method of the casting dead head structure of upper end face closure casting, it is characterised in that following steps：
The first step, in the side of cast structure part, gap running channel of arranging, the arrangement spacing of gap running channel is 190-210 millis
Rice；
Second step places chill on the sand core surface of the medial surface of casting upper surface；
Third step, production room is away from the gap running channel formula riser for being 160-190 millimeters on casting upper surface, and in two gaps
Chill is placed between running channel formula riser；Gap running channel formula riser is by the gap running channel sealing of lower section and the molten metal memory block of top
Composition, molten metal memory block thickness is 4-5 times of casting upper end face thickness, and the width that gap running channel formula emits dispute is casting upper end
0.8-1.2 times of face thickness, the side for the chill placed between two gap running channel formula riser and the distance of side wall gap running channel are
30-40 millimeters；
4th step connects gap running channel formula riser with side wall gap running channel.
Gap running channel formula riser is by molten metal storage area（Similar riser top）It is formed with dispute two parts are emitted, molten metal is deposited
Storage area is directly connected with side wall gap running channel, and chill is configured between every two riser and carries out temperature sequence transition, can be promoted flat greatly
Temperature Field in Melt reaches uniform, ordered and has stronger feeding capacity on face.
The present invention is that the function of gap running channel and riser is combined as a whole, and solves upper surface enclosuring structure part and is using
Difference, scattered porosity, mechanical property and uniformity existing for low pressure casting process and the poor technological difficulties of surface quality, structure
Part casting qualification rate is increased to more than 95%.
Description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is structure diagram of the present invention on direction is looked up；
Fig. 3 is the structure diagram of the gap running channel formula riser 4 of the present invention；
Fig. 4 is the arrangement figure of chill outside the upper surface of the present invention；
Fig. 5 is the arrangement figure of chill inside the upper surface of the present invention.
Specific embodiment
The present invention is described in detail below in conjunction with the accompanying drawings：
A kind of casting dead head structure of upper end face closure casting, including cross gate 1, sprue 2 and side wall gap running channel 3,
Setting has the gap running channel formula riser 4 between two side gap running channel 3, and gap running channel formula riser 4 is stitched by the gap running channel of lower section
The molten metal memory block 6 of mouth 5 and top forms, and molten metal memory block 6 is connected together with side wall gap running channel 3.
Chill 7 is provided between two gap running channel formula riser 4；Arrangement of the gap running channel formula riser on casting upper surface
Spacing be 160-190 millimeters, 6 thickness of molten metal memory block is 4-5 times of casting upper end face thickness, and gap running channel formula emits dispute
Width be 0.8-1.2 times of casting upper end face thickness, the side for the chill placed between two gap running channel formula riser and side wall
The distance of gap running channel 3 is 30-40 millimeters.
The construction method of the casting dead head structure of upper end face closure casting, it is characterised in that following steps：
The first step, in the side of cast structure part, gap running channel of arranging, the arrangement spacing of gap running channel is 190-210 millis
Rice；
Second step places chill on the sand core surface of the medial surface of casting upper surface；
Third step, production room is stitched away from the gap running channel formula riser 4 for being 160-190 millimeters, and two on casting upper surface
Chill 7 is placed between gap running channel formula riser 4；Gap running channel formula riser 4 is by the gap running channel sealing 5 of lower section and the molten metal of top
Memory block 6 forms, and 6 thickness of molten metal memory block is 4-5 times of casting upper end face thickness, and the width that gap running channel formula emits dispute is
0.8-1.2 times of casting upper end face thickness, side and the side wall gap running channel 3 of the chill placed between two gap running channel formula riser
Distance be 30-40 millimeters；
4th step connects gap running channel formula riser 4 with side wall gap running channel 3.
Running gate system is to influence upper surface enclosuring structure part mechanical property, interior tissue with dead head structure and its construction method
And the principal element of surface quality defect, because it influences whether the mobility of aluminium alloy liquid, reduce the castability of aluminium alloy
Can, it is that generation is loose（Containing microporosity）, hot and cold crackle, the casting flaws such as segregation the main reason for, be easy to causeing structural member should
Power is concentrated, the mechanical property of severe exacerbation structural member.By analyzing structural member casting technique long-term follow, find in structural member
Mechanical properties value at the running channel of gap:Tensile strength, yield strength value are higher by 15%~20% than other positions, and elongation is higher by
30%~40%, the reinforcement more apparent than other positions of interior tissue refinement value（Degree of refinement is higher）.Therefore aluminum alloy junction component is in difference
Casting and forming process is pressed, by the way that the quantity, structure size, spacing of gap running channel, riser and chill, structural member is reasonably configured
Mechanical property and interior tissue mass value can obtain larger raising.Upper surface enclosuring structure part is in application gap running channel, monolithic
During riser casting and forming, solidification processing temperature field is not easy to reach the trend serially or simultaneously solidified, and temperature field will appear disorderly, no
Uniformly, big plane class formation part inside and solidification layer surface can generate enrichment of element（Surface enrichment layer depth is generally in 3-5 millis
Rice）, areal concentration can vary widely（Gravity segregation）And inside structural member to generate dispersed loose（Substantially
Through entire wall thickness）, it is serious to generate shrinkage porosite, shrinkage cavity, stomata, cold and hot crackle casting flaw, influence big plane class formation
Part surface quality（It is uneven that hardness occurs in surface, needle-shaped, linear, the inconsistent defect of bulk aberration）And mechanical property and internal group
It knits, is connected using gap running channel formula riser with gap running channel and the construction method of chill transition, it is ensured that low counter-pressure casting
The all technical of upper end face closure casting after molding.
Claims (2)
1. a kind of casting dead head structure of upper end face closure casting, including cross gate（1）, sprue（2）With side wall gap running channel
（3）, which is characterized in that in two side gap running channel（3）Between setting have the gap running channel formula riser（4）, gap running channel formula riser
（4）By the gap running channel sealing of lower section（5）With the molten metal memory block of top（6）Composition, molten metal memory block（6）Pass through gap
Running channel sealing（5）With side wall gap running channel（3）It is connected together.
2. the casting dead head structure of a kind of upper end face closure casting according to claim 1, which is characterized in that in two gaps
Running channel formula riser（4）Between be provided with chill（7）；Gap running channel formula riser（4）The spacing of arrangement on casting upper surface is
160-190 millimeters, molten metal memory block（6）Thickness is 4-5 times of casting upper end face thickness, and gap running channel formula emits the width of dispute
It is 0.8-1.2 times of casting upper end face thickness, the side of chill placed between two gap running channel formula riser is poured with side wall gap
Road（3）Distance be 30-40 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721595593.6U CN207508248U (en) | 2017-11-25 | 2017-11-25 | The casting dead head structure of upper end face closure casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721595593.6U CN207508248U (en) | 2017-11-25 | 2017-11-25 | The casting dead head structure of upper end face closure casting |
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| Publication Number | Publication Date |
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| CN207508248U true CN207508248U (en) | 2018-06-19 |
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| CN201721595593.6U Withdrawn - After Issue CN207508248U (en) | 2017-11-25 | 2017-11-25 | The casting dead head structure of upper end face closure casting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107661972A (en) * | 2017-11-25 | 2018-02-06 | 山西江淮重工有限责任公司 | The casting dead head structure and its construction method of upper end face closure casting |
| CN114535517A (en) * | 2020-11-26 | 2022-05-27 | 中国兵器工业第五九研究所 | Forming method of revolving body casting |
| CN114653896A (en) * | 2022-04-28 | 2022-06-24 | 贵州航天风华精密设备有限公司 | Defect control system for cylindrical castings |
-
2017
- 2017-11-25 CN CN201721595593.6U patent/CN207508248U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107661972A (en) * | 2017-11-25 | 2018-02-06 | 山西江淮重工有限责任公司 | The casting dead head structure and its construction method of upper end face closure casting |
| CN114535517A (en) * | 2020-11-26 | 2022-05-27 | 中国兵器工业第五九研究所 | Forming method of revolving body casting |
| CN114535517B (en) * | 2020-11-26 | 2024-04-12 | 中国兵器工业第五九研究所 | Forming method of revolving body casting |
| CN114653896A (en) * | 2022-04-28 | 2022-06-24 | 贵州航天风华精密设备有限公司 | Defect control system for cylindrical castings |
| CN114653896B (en) * | 2022-04-28 | 2023-10-27 | 贵州航天风华精密设备有限公司 | Defect control system for cylindrical castings |
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Granted publication date: 20180619 Effective date of abandoning: 20230228 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180619 Effective date of abandoning: 20230228 |