CN103658544B - Designing and preparation method for conversion-free preliminary processing reference integral sand core - Google Patents
Designing and preparation method for conversion-free preliminary processing reference integral sand core Download PDFInfo
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- CN103658544B CN103658544B CN201310649862.2A CN201310649862A CN103658544B CN 103658544 B CN103658544 B CN 103658544B CN 201310649862 A CN201310649862 A CN 201310649862A CN 103658544 B CN103658544 B CN 103658544B
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Abstract
The present invention relates to a kind of designing and preparation method for conversion-free preliminary processing reference integral sand core, by in design basis plane design preliminary working benchmark, then reach into an integral sand core with the core Integration Design where crucial black skin and control the dimensional discrepancy between black skin and machine plus face in the range of very little.Present invention decreases between preliminary working benchmark, between black skin and preliminary working benchmark, the dimensional discrepancy between black skin, so as to ensure the dimension precision requirement of casting.
Description
Technical field
It is especially a kind of the present invention relates to a kind of method of core design and coremaking applied to sand mold hot investment casting field
Designing and preparation method for conversion-free preliminary processing reference integral sand core.
Background technology
The design and core-making technique of original sand core for casting be：Casting design → preliminary working reference design → casting technique side
Sand is penetrated in case design → core and group core design → Core Box → core box manufacture → core box prepares →（Back-up sand）→ consolidation → core
Solidification → core depanning → core inspection → core repairing → coremaking is completed.
The technology be by multiple cores combine after poured into a mould, be primarily present following deficiencies：1）First on different cores plus
There is dimensional discrepancy between work benchmark；2）There is dimensional discrepancy between preliminary working benchmark and black skin on different cores；3）Different sand
There is dimensional discrepancy between black skin on core.These deficiencies are delivered on casting after can deviation be accumulated, and cause the blank of casting
There is larger dimensional discrepancy in face, cause after Mechanical processing of casting, the dimension overproof between black skin and machined surface with preliminary working benchmark.
The content of the invention
The purpose of the present invention is to provide a kind of designing and preparation method for conversion-free preliminary processing reference integral sand core for casting, makes hair
Base face keeps stable and accurate dimensional accuracy with preliminary working benchmark, so as to ensure after casting machining, machined surface and black skin
Between dimension precision requirement.The present invention technology solution scheme be：
1）Casting is designed；
2）Casting process scheme is designed：Pouring position is determined, running gate system, component and parting Surface Design is carried out；
3）Preliminary working reference design：Preliminary working benchmark is designed on the corresponding core in spray face, concrete scheme is：
4 standard stations are set in casting Z-X design basises plane, and one of them is checking benchmark；In casting Z-Y design basis planes
4 standard stations are set, and one of them is checking benchmark；3 standard stations are set in casting X-Y design basis planes；
4）Integral sand core is designed：Each core Integration Design where preliminary working benchmark and crucial black skin is whole into one
Body core, the plane that described crucial black skin is located at by basic size in part；
5）Integral sand core coremaking：Core, design parameter are carried out using 3D rapid prototyping machine：Roughing sand granularity is 110 ~ 140 mesh,
Slicing layer thickness is 0.15 ~ 0.20mm；
6）Core is risen again：At in-furnace temperature≤40 DEG C, core is entered into stove, 150 DEG C~160 are slowly steadily warming up to stove
2 ~ 2.5 hours are incubated after DEG C ,≤40 DEG C is cooled to the furnace, comes out of the stove；
7）Core inspection is repaired；
8）Coremaking is completed.
The length, width and height size of preliminary working benchmark in described Z-X and Z-Y design basis planes is：15mm×10mm×
10mm；Preliminary working reference dimension in X-Y design basis planes is：ф15×1.5mm.
The present invention is then whole with core where crucial black skin by design basis plane design preliminary working benchmark
Conjunction is designed to an integral sand core, reaches the purpose controlled the dimensional discrepancy between black skin and machine plus face in the range of 0.4mm.
In order to solve integral sand core can not depanning the problem of, using 3D rapid prototyping machine carry out integral sand core preparation.The present invention's is excellent
Point is to design preliminary working benchmark on same integral sand core with crucial black skin, reapplies 3D technology and carries out coremaking, reduces
Between preliminary working benchmark, between black skin and preliminary working benchmark, the dimensional discrepancy between black skin, so as to ensure that the dimensional accuracy of casting will
Ask.
Embodiment
The step of designing and preparation method for conversion-free preliminary processing reference integral sand core, is as follows：
1）Casting is designed；
2）Casting process scheme is designed：Pouring position is determined, running gate system, component and parting Surface Design is carried out；
3）Preliminary working reference design：Preliminary working benchmark is designed on the corresponding core in spray face, concrete scheme is：
4 standard stations are set in casting Z-X design basises plane, and one of them is checking benchmark；In casting Z-Y design basis planes
4 standard stations are set, and one of them is checking benchmark；3 standard stations are set in casting X-Y design basis planes；
4）Integral sand core is designed：Each core Integration Design where preliminary working benchmark and crucial black skin is whole into one
Body core, the plane that described crucial black skin is located at by basic size in part；
5）Integral sand core coremaking：Core, design parameter are carried out using 3D rapid prototyping machine：Roughing sand granularity is 110 ~ 140 mesh,
Slicing layer thickness is 0.15 ~ 0.20mm；
6）Core is risen again：At in-furnace temperature≤40 DEG C, core is entered into stove, 150 DEG C~160 are slowly steadily warming up to stove
2 ~ 2.5 hours are incubated after DEG C ,≤40 DEG C is cooled to the furnace, comes out of the stove；
7）Core inspection is repaired；
8）Coremaking is completed.
The length, width and height size of preliminary working benchmark in described Z-X and Z-Y design basis planes is：15mm×10mm×
10mm；Preliminary working reference dimension in X-Y design basis planes is：ф15×1.5mm.
Embodiment one
Helicopter particle separator front housing casting, wall thickness 2.8mm, dimensional accuracy is HB6103 CT6 levels, and minimum machine adds
Spare time amount is 0.5mm, and the minimum wall thickness (MINI W.) of machined surface and black skin is 1.9mm.
Implementation process：
1）Casting is designed；
2）Casting process scheme is designed：Pouring position is determined, running gate system, component and parting Surface Design is carried out；
3）Preliminary working reference design：Preliminary working benchmark is designed on the corresponding core in spray face, concrete scheme is：
4 standard stations are set in casting Z-X design basises plane, and one of them is checking benchmark；In casting Z-Y design basis planes
4 standard stations are set, and one of them is checking benchmark；3 standard stations are set in casting X-Y design basis planes；Described
The length, width and height size of preliminary working benchmark in Z-X and Z-Y design basis planes is：15mm×10mm×10mm；X-Y design basises
Preliminary working reference dimension in plane is：ф15×1.5mm；
4）Integral sand core is designed：Each core Integration Design where preliminary working benchmark and crucial black skin is whole into one
Body core, described crucial black skin is the surface of revolution and oil circuit of front housing；
5）Integral sand core coremaking：Core, design parameter are carried out using 3D rapid prototyping machine：Roughing sand granularity is 110~140
Mesh, slicing layer thickness is 0.15mm；
6）Core is risen again：When in-furnace temperature is 30 DEG C, core is entered into stove, is slowly steadily warming up to after 155 DEG C and protects with stove
Temperature 2 hours, cools to 30 DEG C with the furnace, comes out of the stove；
7）Core inspection is repaired；
8）Coremaking is completed.
The front housing casting cast using the technology detects that critical size precision has reached HB6103's after processing
CT6 precision, local oil circuit hole realizes 0.5mm small surplus processing, it is ensured that machined surface and black skin minimum wall thickness (MINI W.) 1.9mm
Size requirement.
Claims (2)
1. a kind of designing and preparation method for conversion-free preliminary processing reference integral sand core, it is characterized in that, described method includes following step
Suddenly：
1) casting is designed；
2) casting process scheme is designed：Pouring position is determined, running gate system, component and parting Surface Design is carried out；
3) preliminary working reference design：Preliminary working benchmark is designed on the corresponding core in spray face, concrete scheme is：In casting
4 standard stations are set in Z-X design basises plane, and one of them is checking benchmark；Set in casting Z-Y design basis planes
4 standard stations, one of them is checking benchmark；3 standard stations are set in casting X-Y design basis planes；
4) integral sand core is designed：By each core Integration Design where preliminary working benchmark and crucial black skin into a unit sand
Core, the plane that described crucial black skin is located at by basic size in part；
5) integral sand core coremaking：Core manufacture, design parameter are carried out using 3D rapid prototyping machine：Roughing sand granularity is 110~140
Mesh, slicing layer thickness is 0.15~0.20mm；
6) core is risen again：At in-furnace temperature≤40 DEG C, core is entered into stove, is slowly steadily warming up to after 150 DEG C~160 DEG C with stove
Insulation 2~2.5 hours, cools to≤40 DEG C with the furnace, comes out of the stove；
7) core inspection is repaired；
8) coremaking is completed.
2. designing and preparation method for conversion-free preliminary processing reference integral sand core as claimed in claim 1, it is characterized in that, described Z-
The length, width and height size of preliminary working benchmark in X and Z-Y design basis planes is 15mm × 10mm × 10mm；X-Y design basises are put down
Preliminary working reference dimension in face is 15 × 1.5mm of φ.
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| CN201310649862.2A CN103658544B (en) | 2013-12-06 | 2013-12-06 | Designing and preparation method for conversion-free preliminary processing reference integral sand core |
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| CN201310649862.2A CN103658544B (en) | 2013-12-06 | 2013-12-06 | Designing and preparation method for conversion-free preliminary processing reference integral sand core |
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| CN103658544B true CN103658544B (en) | 2017-11-07 |
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| CN109290523B (en) * | 2018-11-23 | 2020-11-03 | 安徽应流集团霍山铸造有限公司 | Method for processing and manufacturing small-caliber high-pound-grade valve body integral sand core |
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| US5976457A (en) * | 1997-08-19 | 1999-11-02 | Amaya; Herman E. | Method for fabrication of molds and mold components |
| CN100493811C (en) * | 2007-04-04 | 2009-06-03 | 大连理工大学 | Integral forming method for overlay film powder in complex shape of geometrical body of disabled laser selection |
| CN101497120B (en) * | 2008-01-31 | 2010-11-10 | 上海爱仕达汽车零部件有限公司 | Arrangement method of casting system of aluminium alloy cylinder metal mould low-pressure casting |
| CN101502870A (en) * | 2009-03-18 | 2009-08-12 | 中国北车集团大连机车车辆有限公司 | Three-dimensional positioning casting technique with three-dimensional coordinate for sand core |
| CN101618432B (en) * | 2009-07-31 | 2011-06-29 | 上海林飞铸造科技有限公司 | Casting method of casting with machining reference |
| CN101716649A (en) * | 2009-11-17 | 2010-06-02 | 中国航天科技集团公司第九研究院第十六研究所 | Lost sand casting process based on photocuring rapid forming |
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