CN108889902A - A method of improving casting sand type deformability - Google Patents
A method of improving casting sand type deformability Download PDFInfo
- Publication number
- CN108889902A CN108889902A CN201810810272.6A CN201810810272A CN108889902A CN 108889902 A CN108889902 A CN 108889902A CN 201810810272 A CN201810810272 A CN 201810810272A CN 108889902 A CN108889902 A CN 108889902A
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- China
- Prior art keywords
- tooling
- sand
- sand mold
- yielding
- deformability
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
Abstract
The present invention relates to a kind of methods for improving casting sand type deformability, by devising yielding tooling, and are arranged in position thicker in sand mold tooling, after back-up sand and molding, cavity structure are formd at the position for making a concession tooling, to improve the deformability of sand mold.The present invention makes a concession tooling by design, avoids because deformability caused by sand mold is blocked up is insufficient, in whole process, any additives is not dosed, to ensure that the final size and quality of casting yet.
Description
Technical field
The present invention relates to a kind of methods for improving casting sand type deformability, reduce deflation resistance when casting solidification, avoid
The problems such as casting is deformed, crackle.
Background technique
Major part aviation wheel chamber casing class casting structure is complicated at present, and wall thickness is smaller, oil circuit and is not available for repair welding repairing
Region it is more, in sand mold gravity casting process, often occur visually or the crack defect of non-destructive testing, tracing it to its cause main
It is that the casting excessive consolidation in the thick big position in sand mold part, casting mold after moulding are heated in casting process by high temperature alloy liquid, is heated
The problems such as expansion causes casting sand mold deformability in solidification and desanding insufficient, and contraction is obstructed, and generates stress deformation, crackle.Often
Settling mode is that the substances such as coal dust, residual oil, sawdust are added in molding sand, to improve the deformability of sand mold, reduces hot pressing and answers
Power, but easily cause in casting mold type face in this technology implementation process that there are the substances such as coal dust, residual oil, sawdust, lead to casting misrun.
Summary of the invention
The object of the present invention is to provide a kind of methods for improving casting sand type deformability, reduce resistance when aluminium alloy solidification
The defects of power, reduction casting deformation, crackle, improve casting qualified rate.
The specific technical solution of the present invention is that the method for the raising casting sand type deformability includes the following steps：
1) sand mold tooling is designed：According to casting drawing, casting sand type tooling is designed, if the sand mold tooling after design is all
When part thickness is respectively less than 250mm, then it is designed and manufactures in the usual way, is poured；What if the sand mold tooling after design had
When part thickness is greater than 250mm, then the manufacture for making a concession the design of tooling is carried out；
2) tooling is made a concession in design：The yielding tooling is mounted in position of the sand mold tooling thickness greater than 250mm, and is moved back
Allow the distance between tooling outer profile and the maximum position at the position between 30-50mm；
3) manufacture sand mold tooling and yielding sand mold：According to the design of the above-mentioned the 1) step and the 2) step, sand mold work is manufactured
Dress and yielding tooling；
4) moulding：Back-up sand manufactures sand mold；
5) molding：By sand mold tooling and make a concession sand mold taking-up；
6) group type：Each section sand mold and sand core are combined, final product casting sand mould is formed；
7) it casts：It is poured, cooled down by defined process, desanding；
8) final inspection.
It is cavity structure in the yielding tooling.
Design has operating handle in the yielding tooling, in order to make a concession the molding of tooling.
Support rod is designed in the yielding tooling, the support rod guarantees that make a concession tooling bottom has with sand mold tooling
The distance of 30-50mm.
The present invention is arranged in position thicker in sand mold tooling by devising yielding tooling, after back-up sand and molding,
Cavity structure is formd at the position for making a concession tooling, that is to say, that due to the presence of cavity structure, becomes former thicker component
It is thin, to improve the deformability of sand mold；Meanwhile Fixture Design will be made a concession into cavity structure, weight is reduced, operation is improved
Performance, the operating handle and support rod of design keep yielding tooling work relatively reliable, ensure that the final thickness of sand mold.Therefore,
The present invention makes a concession tooling by design, avoids because deformability caused by sand mold is blocked up is insufficient, in whole process, does not also have
Any additives is dosed, to ensure that the final size and quality of casting.
Detailed description of the invention
Fig. 1 is the structural schematic diagram after sand mold tooling and yielding tooling combination.
Specific embodiment
As shown, the method for improving casting sand type deformability includes the following steps：
1) sand mold tooling is designed：According to casting drawing, casting sand type tooling 1 is designed, if the sand mold tooling 1 after design is all
Part thickness when being respectively less than 250mm, then be designed and manufacture in the usual way, be poured；If the sand mold tooling after design has
Part thickness be greater than 250mm when, then carry out make a concession tooling 2 design manufacture；
2) tooling is made a concession in design：The yielding tooling 2 is mounted in position of 1 thickness of sand mold tooling greater than 250mm, and
The distance between 2 outer profile of tooling and the maximum position at the position are made a concession between 30-50mm；
3) manufacture sand mold tooling and yielding sand mold：According to the design of the above-mentioned the 1) step and the 2) step, sand mold work is manufactured
It fills 1 and makes a concession tooling 2；
4) moulding：Back-up sand manufactures sand mold；
5) molding：Sand mold tooling 1 and yielding sand mold 2 are taken out；
6) group type：Each section sand mold and sand core are combined, final product casting sand mould is formed；
7) it casts：It is poured, cooled down by defined process, desanding；
8) final inspection.
It is cavity structure in the yielding tooling 2.
Design has operating handle 3 in the yielding tooling 2, in order to make a concession the molding of tooling.
Support rod 4 is designed in the yielding tooling 2, the support rod 4 guarantees to make a concession tooling bottom and sand mold work
Fill 1 distance for having 30-50mm.
Claims (4)
1. a kind of method for improving casting sand type deformability, which is characterized in that the method includes the following steps：
1) sand mold tooling is designed：It according to casting drawing, designs casting sand type tooling (1), if the sand mold tooling 1 after design is all
When part thickness is respectively less than 250mm, then it is designed and manufactures in the usual way, is poured；What if the sand mold tooling after design had
When part thickness is greater than 250mm, then the manufacture of the design of yielding tooling (2) is carried out；
2) tooling is made a concession in design：The yielding tooling (2) is mounted in position of sand mold tooling (1) thickness greater than 250mm, and
The distance between tooling (2) outer profile and the maximum position at the position are made a concession between 30-50mm；
3) manufacture sand mold tooling and yielding sand mold：According to the design of the above-mentioned the 1) step and the 2) step, manufacture sand mold tooling (1)
With yielding tooling (2)；
4) moulding：Back-up sand manufactures sand mold；
5) molding：By sand mold tooling (1) and make a concession sand mold (2) taking-up；
6) group type：Each section sand mold and sand core are combined, final product casting sand mould is formed；
7) it casts：It is poured, cooled down by defined process, desanding；
8) final inspection.
2. a kind of method for improving casting sand type deformability as described in claim 1, which is characterized in that in the yielding work
Filling (2) is cavity structure.
3. a kind of method for improving casting sand type deformability as described in claim 1, which is characterized in that in the yielding work
Design has operating handle (3) on dress (2), in order to make a concession the molding of tooling.
4. a kind of method for improving casting sand type deformability as described in claim 1, which is characterized in that in the yielding work
It fills and designs support rod (4) on (2), the support rod (4) guarantees that making a concession tooling bottom and sand mold tooling (1) has 30-50mm's
Distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810810272.6A CN108889902A (en) | 2018-07-20 | 2018-07-20 | A method of improving casting sand type deformability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810810272.6A CN108889902A (en) | 2018-07-20 | 2018-07-20 | A method of improving casting sand type deformability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108889902A true CN108889902A (en) | 2018-11-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810810272.6A Pending CN108889902A (en) | 2018-07-20 | 2018-07-20 | A method of improving casting sand type deformability |
Country Status (1)
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| CN (1) | CN108889902A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110976782A (en) * | 2020-01-08 | 2020-04-10 | 西华大学 | Sand mold casting process adopting telescopic core rod |
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| CN110976782A (en) * | 2020-01-08 | 2020-04-10 | 西华大学 | Sand mold casting process adopting telescopic core rod |
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Application publication date: 20181127 |
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