CN102228957B - Method for reinforcing rigidity of sand core bar - Google Patents
Method for reinforcing rigidity of sand core bar Download PDFInfo
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- CN102228957B CN102228957B CN 201110177326 CN201110177326A CN102228957B CN 102228957 B CN102228957 B CN 102228957B CN 201110177326 CN201110177326 CN 201110177326 CN 201110177326 A CN201110177326 A CN 201110177326A CN 102228957 B CN102228957 B CN 102228957B
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- sand core
- core bar
- gap
- rigidity
- arbor
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- Casting Devices For Molds (AREA)
Abstract
The invention relates to a method for reinforcing rigidity of a sand core bar. The method comprises the following steps of: providing continuous pre-tightening drawing forces at both ends of the core bar so that both ends of the core bar suffer drawing forces by which the core bar can resist a floating force against the sand core generated by melted iron; pre-setting an adjustment gap between the both ends of the core bar, wherein the gap is greater than a gap amount of the cast sand core; and arranging the pre-tightening drawing forces out of a sand box so as to operate and to continue the pre-tightening drawing forces conveniently. The method for reinforcing rigidity of the sand core bar disclosed by the invention is applied to slender type casting members or slender type hole sand core bars, and rigidity of the sand core bar is reinforced by pre-tightening drawing forces; and meanwhile, the adjusting gap is preset, so that the floating force against the sand core generated by the melted iron can be resisted effectively, and un-flatness of the inner wall or the hole of the casting member is reduced or eliminated.
Description
Technical field
The present invention relates to the metallurgical casting industry, particularly a kind of method that strengthens rigidity of sand core bar.
Background technology
In the Foundry Production, leptosomatic foundry goods or elongate slot often cause defective because sand core rod insufficient rigidity in casting process causes bending, and foundry goods inwall or hole are not straight or scrap at present.
How to improve this situation, seeking a kind of method that strengthens rigidity of sand core bar becomes pursuing a goal of these those skilled in the art.
Summary of the invention
Task of the present invention provides a kind of method that strengthens rigidity of sand core bar, it has solved the existing problem of above-mentioned prior art, utilize prefastening force to strengthen rigidity of sand core bar, regulate simultaneously preset clearance, effectively resist iron liquid to the buoyancy that core produces to reach, alleviate and eliminate the not straight purpose of foundry goods inwall or hole.
Technical solution of the present invention is as follows:
A kind of method that strengthens rigidity of sand core bar, take following steps and method:
(1) at the arbor two ends lasting prefastening force is set, makes arbor two ends under tension, the buoyancy that core is produced to resist iron liquid;
(2) reserve the adjusting gap at arbor two ends, this gap is greater than the casting sand core gap value;
(3) prefastening force is external outside sandbox, so that operation and lasting prefastening force.
Described prefastening force is implemented by the pretension stretching device.
The present invention makes it compared with prior art owing to adopted above technical scheme, the method for enhancing rigidity of sand core bar of the present invention be a kind of economy, effectively, strengthen the preferably method of rigidity of sand core bar, have comparatively desirable practical function.
Method by enhancing rigidity of sand core bar of the present invention, be used for leptosomatic foundry goods or elongate slot sand core rod, utilize prefastening force to strengthen rigidity of sand core bar, reserve simultaneously and regulate the gap, can effectively resist iron liquid to the buoyancy that core produces, alleviate and eliminate the unflatness in foundry goods inwall or hole.
Description of drawings
Fig. 1 is a kind of enforcement schematic diagram that strengthens the method for rigidity of sand core bar of the present invention.
Reference numeral:
1 is arbor, and 2 for reserving the adjusting gap, and 3 is prefastening force.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is elaborated.
Referring to Fig. 1, the invention provides a kind of method that strengthens rigidity of sand core bar, take following steps and method:
(1) at arbor 1 two ends lasting prefastening force 3 is set, makes arbor 1 two ends under tension, the buoyancy that core is produced to resist iron liquid.
(2) reserve adjusting gap 2 at arbor 1 two ends, this gap 2 is greater than the casting sand core gap value.
(3) prefastening force 3 is external outside sandbox, so that operation and lasting prefastening force.
The prefastening force 3 that arranges at arbor 1 two ends can be implemented by the pretension stretching device, makes arbor two end under tensions, can effectively resist iron liquid to the buoyancy that core produces, and reaches the purpose that strengthens rigidity of sand core bar.
In sum, method with enhancing rigidity of sand core bar of the present invention, be used for leptosomatic foundry goods or elongate slot sand core rod, utilize prefastening force to strengthen rigidity of sand core bar, reserve simultaneously and regulate the gap, can effectively resist iron liquid to the buoyancy that core produces, alleviate and eliminate the unflatness in foundry goods inwall or hole.
Certainly, those skilled in the art in the art will be appreciated that, above-described embodiment only is that the present invention is described, and be not as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claim of the present invention the variation of above-described embodiment, modification etc.
Claims (1)
1. method that strengthens rigidity of sand core bar is characterized in that: be used for leptosomatic foundry goods or elongate slot sand core rod, take following steps and method:
(1) at the arbor two ends lasting prefastening force is set, makes arbor two ends under tension, the buoyancy that core is produced to resist iron liquid;
(2) reserve the adjusting gap at arbor two ends, this gap is greater than the casting sand core gap value;
(3) prefastening force is external outside sandbox, so that operation and lasting prefastening force;
Described prefastening force is implemented by the pretension stretching device, makes arbor two end under tensions, effectively resists iron liquid to the buoyancy that core produces, and alleviates and eliminate the unflatness in foundry goods inwall or hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110177326 CN102228957B (en) | 2011-06-28 | 2011-06-28 | Method for reinforcing rigidity of sand core bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110177326 CN102228957B (en) | 2011-06-28 | 2011-06-28 | Method for reinforcing rigidity of sand core bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102228957A CN102228957A (en) | 2011-11-02 |
| CN102228957B true CN102228957B (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110177326 Active CN102228957B (en) | 2011-06-28 | 2011-06-28 | Method for reinforcing rigidity of sand core bar |
Country Status (1)
| Country | Link |
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| CN (1) | CN102228957B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105414487B (en) * | 2015-12-02 | 2017-11-14 | 安徽马钢重型机械制造有限公司 | A kind of fixing means of large-scale loam core |
| CN110576150A (en) * | 2019-10-24 | 2019-12-17 | 上海宝钢铸造有限公司 | Manufacturing method for improving flatness of casting |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5201357A (en) * | 1992-01-16 | 1993-04-13 | Cmi International, Inc. | Method for forming cored passageways within cast metal articles |
| DE4323002A1 (en) * | 1993-07-09 | 1995-01-12 | Huettenes Albertus | Core for precasting holes in castings, and the manufacture of the said core |
| CN101745603A (en) * | 2009-12-28 | 2010-06-23 | 临沂蒙凌铸钢有限公司 | Core making technology of Furan resin sand casting steel car axle casing |
| CN101920312A (en) * | 2010-08-21 | 2010-12-22 | 宜昌船舶柴油机有限公司 | Casting method and leveling tool for large multi-blade casting |
| CN201735736U (en) * | 2010-08-21 | 2011-02-09 | 宜昌船舶柴油机有限公司 | Leveling tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE464136T1 (en) * | 2004-08-25 | 2010-04-15 | Martin Zoldan | PRE-TENSIONED SAND CORE |
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2011
- 2011-06-28 CN CN 201110177326 patent/CN102228957B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5201357A (en) * | 1992-01-16 | 1993-04-13 | Cmi International, Inc. | Method for forming cored passageways within cast metal articles |
| DE4323002A1 (en) * | 1993-07-09 | 1995-01-12 | Huettenes Albertus | Core for precasting holes in castings, and the manufacture of the said core |
| CN101745603A (en) * | 2009-12-28 | 2010-06-23 | 临沂蒙凌铸钢有限公司 | Core making technology of Furan resin sand casting steel car axle casing |
| CN101920312A (en) * | 2010-08-21 | 2010-12-22 | 宜昌船舶柴油机有限公司 | Casting method and leveling tool for large multi-blade casting |
| CN201735736U (en) * | 2010-08-21 | 2011-02-09 | 宜昌船舶柴油机有限公司 | Leveling tool |
Non-Patent Citations (1)
| Title |
|---|
| 技工学校机械类通用教材编审委员会.铸工工艺学.《铸工工艺学》.机械工业出版社,1980,(第1版),59. * |
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| CN102228957A (en) | 2011-11-02 |
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