CN105312507A - Method for connecting and fixing sand cores - Google Patents
Method for connecting and fixing sand cores Download PDFInfo
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- CN105312507A CN105312507A CN201510783568.XA CN201510783568A CN105312507A CN 105312507 A CN105312507 A CN 105312507A CN 201510783568 A CN201510783568 A CN 201510783568A CN 105312507 A CN105312507 A CN 105312507A
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Abstract
The invention aims at providing a method for connecting and fixing sand cores to solve the problem that combined sand cores are combined unstably in the prior art. The method comprises the steps that the two sand cores to be connected are each provided with a mounting through hole penetrating through a connecting face, the two sand cores are vertically combined to specified dimension positions under the cooperation of a measuring tool and cushion blocks, and then the lower end of the through hole of the lower sand core is sealed; molten metal the same as a casting cast through the sand cores is collected and poured into a sand core hole cavity, and the molten metal overflowing out of the cavity is cleared away; and when the molten metal in the hole cavity is completely solidified, all the cushion blocks and the measuring tool are withdrawn, and the firmly-combined sand cores are obtained. According to the method, the relative positions between the sand cores to be combined are controlled through metal pouring and combination of the cushion blocks and the measuring tool, and the cores are firmly combined and do not separate from each other; the requirements for transportation and lower core hoisting and repeated adjusting are met, and the dimension stability of the casting is guaranteed.
Description
Technical field
The invention belongs to intricate casting casting field, particularly a kind of core is connected and fixed method.
Background technology
The inner chamber of casting of complicated structure is usually by polylith core combination forming, and the tautness of combination core, precision directly affect the stability of casting dimension.At present, general core interconnection technique is bonded together by multiple core by binding agent.But, the surface penetration of binding agent core is after hardening limited in one's ability, be merely able to form thin slice stratiform fastened layer in core connecting surface, the ability that this fastened layer bears vertical direction pulling force is lower, be unsuitable for hoisting transportation and lower core lifting repeatedly adjust, and binding agent has certain tendency of getting angry when casting, and easily brings mass defect hidden danger.
Therefore, be necessary to study the tautness improving combination core, precision.
Summary of the invention
The object of the invention is to be directed to the problems of the prior art, provide a kind of core and be connected and fixed method.Core to be combined is combined by metal pouring, cushion block and measuring tool and controls relative position between core by the method, achieve firmly combination between core, do not depart from, not only applicable transport and lower core lift by crane the needs repeatedly adjusted, and ensure that the stability of casting dimension.
A kind of core is connected and fixed method, comprises the steps:
(1) on two cores to be connected, respectively arrange an installation through hole through two core joint faces, the central axis of two through holes on the same line;
Through hole can be cone, and the taper end of centrum is positioned on the joint face of two cores;
Preferably, through hole is rectangular pyramid;
(2) under the cooperation of measuring tool and cushion block, by two cores one upper one under be combined to the two given size position on mold, and make that the through hole of two cores matches, the central axis of through hole on the same line; Preferably, when solidifying to prevent molten metal, shrinkage stress causes core distortion, distortion, the joint face of two cores is coated with last layer cushion, and between two cores, places several cushion block strong point according to core concrete shape; Seal in the through hole lower end of lower core again, make two through holes define the vestibule of one end sealing other end opening;
Described cushion can glue cream for hygrometric state bentonite, talcum powder glues cream or tinfoil etc.;
Described sealing means can be the direct contact type shutoff be placed on by core on platform, also can be to carry out shutoff with the sprue such as refractory material, ceramics;
(3) get the molten metal identical with the foundry goods utilizing this core to cast, be filled in core vestibule, and the molten metal outside spill cavity is removed; Treat that the molten metal in vestibule solidifies completely, withdraw from all cushion blocks and measuring tool, namely obtain combining firmly core.
Compared with prior art, advantage of the present invention is:
1, by the method for the present invention's reserved filling connecting hole of molten metal on core, achieve firmly combination between core, do not depart from, not only applicable transport and lower core lift by crane the needs repeatedly adjusted, and ensure that the stability of casting dimension.
2, the method can make the complex core production method of intricate casting inner chamber be changed over by a complicated entirety of producing once---and watered the mode of combination by several simple core through molten metal, simplify operation and the technology difficulty of complex core.
Accompanying drawing explanation
Fig. 1 is the generalized section of core to be connected in embodiment 1;
Wherein, 1, core 1,2, core 2,3, through hole, 4, joint face, 5, cushion block.
Detailed description of the invention
Embodiment 1
Make the foundry goods of certain magnesium alloy materials, its core has multiple, and wherein the schematic shapes of two cores to be combined is as shown in Figure 1, and its associated methods is as follows:
(1) when preparing core 1 to be connected and core 2, two cores respectively arrange a through hole 3 through two core joint faces, through hole 3 is rectangular pyramid, the central axis of through hole 3 on the same line, and the taper end of centrum to be positioned on the joint face 4 of two cores, measure-alike;
(2) under the cooperation of measuring tool and cushion block, on platform, by core 2 down, given size position both again core 1 and core 2 being combined on mold, and make that the through hole 3 of two cores matches, the central axis of through hole 3 on the same line, when solidifying to prevent molten metal, shrinkage stress causes core distortion, distortion, the joint face 4 of two cores is coated with last layer hygrometric state bentonite, talcum powder glues cream, or tinfoil cushion, and between two cores, place cushion block 5 strong point;
(3) get magnesium alloy, be heated into molten metal, be filled in core vestibule, and the molten metal outside spill cavity is removed; Treat that the molten metal in vestibule solidifies completely, withdraw from all cushion blocks 5 and measuring tool, namely obtain combining firmly core.
Utilize 10 Mg alloy castings prepared by this connection core, the error comparatively conventional method reduction 50% of each casting dimension, substantially increases the shaping rate of product.
Embodiment 2
Make the foundry goods of certain aluminum alloy materials, in mold, the associated methods of two cores to be combined is as follows:
(1) when preparation two cores to be connected, an elliptical cone through joint face is respectively set through hole is installed, measure-alike at joint face place of the through hole of two cores, and the central axis of two through holes on the same line;
(2) under the cooperation of measuring tool and cushion block, by two cores one upper one under be combined to the two given size position on mold, and make that the through hole of two cores matches, the central axis of through hole on the same line; Again the sprue of the through hole lower end refractory material at lower core is carried out shutoff, make two through holes define the vestibule of one end sealing other end opening;
(3) get aluminium alloy, be heated into molten metal, be filled in core vestibule, and the molten metal outside spill cavity is removed; Treat that the molten metal in vestibule solidifies completely, withdraw from all cushion blocks and combination measuring tool, namely obtain combining firmly core.
Utilize 10 aluminium alloy castingses prepared by this connection core, the error comparatively conventional method reduction 30% of each casting dimension, substantially increases the shaping rate of product.
Claims (6)
1. core is connected and fixed a method, it is characterized in that, comprises the steps:
(1) on two cores to be connected, respectively arrange an installation through hole through two core joint faces, the central axis of two through holes on the same line;
(2) under the cooperation of measuring tool and cushion block, by two cores one upper one under be combined to the two given size position on mold, and make that the through hole of two cores matches, the central axis of through hole on the same line; Seal in the through hole lower end of lower core again, make two through holes define the vestibule of one end sealing other end opening;
(3) get the molten metal identical with the foundry goods utilizing this core to cast, be filled in core vestibule, and the molten metal outside spill cavity is removed; Treat that the molten metal in vestibule solidifies completely, withdraw from all cushion blocks and measuring tool, namely obtain combining firmly core.
2. a kind of core according to claim 1 is connected and fixed method, it is characterized in that, described through hole is cone, and the taper end of centrum is positioned on the joint face of two cores.
3. a kind of core according to claim 1 is connected and fixed method, it is characterized in that, in described step (2), when two cores are combined to given size position, the joint face of two cores is coated with last layer cushion, and between two cores, places several cushion block strong point according to core concrete shape.
4. a kind of core according to claim 1 is connected and fixed method, it is characterized in that, in described step (2), the sealing means of through hole is the direct contact type shutoff be placed on by core on platform, or for carry out shutoff with sprue.
5. a kind of core according to claim 2 is connected and fixed method, it is characterized in that, described through hole is rectangular pyramid.
6. a kind of core according to claim 4 is connected and fixed method, it is characterized in that, described cushion is that hygrometric state bentonite glues cream, talcum powder glues cream or tinfoil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510783568.XA CN105312507A (en) | 2015-11-14 | 2015-11-14 | Method for connecting and fixing sand cores |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510783568.XA CN105312507A (en) | 2015-11-14 | 2015-11-14 | Method for connecting and fixing sand cores |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105312507A true CN105312507A (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510783568.XA Pending CN105312507A (en) | 2015-11-14 | 2015-11-14 | Method for connecting and fixing sand cores |
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| CN (1) | CN105312507A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114932200A (en) * | 2022-04-01 | 2022-08-23 | 贵州安吉航空精密铸造有限责任公司 | Application method of babbitt alloy matched combined clamp for integral core setting in sand casting |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55122649A (en) * | 1979-03-16 | 1980-09-20 | Kubota Ltd | Casting method of crank shaft for engine |
| CN201308965Y (en) * | 2008-11-30 | 2009-09-16 | 苏州明志铸造有限公司 | Core assembly |
| CN101574727A (en) * | 2009-05-20 | 2009-11-11 | 江苏江旭铸造集团有限公司 | Fastening-embedding type metal gravity casting die for large-sized gear box body |
| CN201906793U (en) * | 2010-12-27 | 2011-07-27 | 自贡长征精密铸锻有限公司 | Casting core for motor mounting boss positions of chip removal grooves of numerical-controlled machine tool bodies |
| CN103480800A (en) * | 2013-08-30 | 2014-01-01 | 广西玉柴机器股份有限公司 | Cylinder head sand core group and assembling method |
-
2015
- 2015-11-14 CN CN201510783568.XA patent/CN105312507A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55122649A (en) * | 1979-03-16 | 1980-09-20 | Kubota Ltd | Casting method of crank shaft for engine |
| CN201308965Y (en) * | 2008-11-30 | 2009-09-16 | 苏州明志铸造有限公司 | Core assembly |
| CN101574727A (en) * | 2009-05-20 | 2009-11-11 | 江苏江旭铸造集团有限公司 | Fastening-embedding type metal gravity casting die for large-sized gear box body |
| CN201906793U (en) * | 2010-12-27 | 2011-07-27 | 自贡长征精密铸锻有限公司 | Casting core for motor mounting boss positions of chip removal grooves of numerical-controlled machine tool bodies |
| CN103480800A (en) * | 2013-08-30 | 2014-01-01 | 广西玉柴机器股份有限公司 | Cylinder head sand core group and assembling method |
Non-Patent Citations (1)
| Title |
|---|
| 中国机械工程学会铸造分会 李新亚: "《铸造手册 第5卷 铸造工艺》", 30 September 2011 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114932200A (en) * | 2022-04-01 | 2022-08-23 | 贵州安吉航空精密铸造有限责任公司 | Application method of babbitt alloy matched combined clamp for integral core setting in sand casting |
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Application publication date: 20160210 |