CN102962436A - Precision casting method of locomotive bogie - Google Patents
Precision casting method of locomotive bogie Download PDFInfo
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- CN102962436A CN102962436A CN2012105280476A CN201210528047A CN102962436A CN 102962436 A CN102962436 A CN 102962436A CN 2012105280476 A CN2012105280476 A CN 2012105280476A CN 201210528047 A CN201210528047 A CN 201210528047A CN 102962436 A CN102962436 A CN 102962436A
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- formwork
- chill
- sand
- engine truck
- casting
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Abstract
The invention discloses a precision casting method of a locomotive bogie, which comprises the steps of mixing sand with cold iron, flattening, painting, drying, heating a mould shell, placing the cold iron and pouring. The method can solve the problem that the inner part of a casting product of the locomotive bogie is slightly loose.
Description
Technical field
The invention belongs to casting industry, be specifically related to a kind of method of engine truck hot investment casting.
Background technology
Engine bogie product adopts microcast process production more, needs in process of production strictly to control the particularly density of 4 pillars of inner materials, otherwise percent defective is high.The inner microporosity of present engine truck hot investment casting generally solves problems by strengthening rising head or increasing the method for subsidizing, but the technique of increase rising head still can not thoroughly solve the problem of inner microporosity; Can eliminate internal defect although increase subsidy, but can increase the difficulty of reconditioning, and reconditioning also is difficult to reach foundry goods original surface quality requirement.
Summary of the invention
The object of the present invention is to provide a kind of method of engine truck hot investment casting, the method adopts chill to join sand, pressing, coating, oven dry, formwork intensification, cast operation, can effectively solve particularly 4 micro-loose problems of column interior of engine truck cast product.
In order to realize the present invention, the technical scheme that the method for a kind of engine truck hot investment casting of the present invention is taked is as follows:
A kind of method of engine truck hot investment casting, it specifically comprises:
Step 1: chill is joined sand: be that chill is offered a concave surface with normal temperature iron, spread normal sands casting water glass molding sand at concave surface, sodium silicate sand is paved the smooth utensil of rear usefulness its pressing, compacting;
Step 2: coating: with sodium silicate sand surface spray one deck fireproof coating of step 1;
Step 3: oven dry: adopt blowtorch that fireproof coating is dried to solidifying;
Step 4: formwork heats up: formwork is warming up to 300-600 degree centigrade;
Step 5: let cool iron: adopt magnet slowly to put into the formwork die cavity chill of step 3;
Step 6: cast: pour steel in the formwork then obtains the engine truck foundry goods.
Above-mentioned steps one described chill is the common iron block of casting industry.
Above-mentioned steps two described fireproof coatings are the known material of casting industry.
Above-mentioned steps four described formworks are engine truck mold and pattern for casting shell, and its intensification scope can be decided according to the formwork size, usually follows the principle of little shell low temperature, large shell high temperature in the intensification scope.
Above-mentioned steps six described cast are to pour into a mould according to a conventional method.
The method of a kind of engine truck hot investment casting of the present invention, owing to placed a chill in the formwork, and be placed with smooth sodium silicate sand in the chill, when pour steel, can change the solidification sequence of molten steel, the i.e. first first cooling of casting, the rear cooling of rear casting, final set is in rising head, make the foundry goods dense internal organization, so just can effectively eliminate the defective of the inner microporosity of foundry goods.The engine truck product that the adopts the method casting particularly UT of its 4 pillars qualified reason rate of detecting a flaw is 100%, and the chill contact-making surface do not have crack defect, and product percent of pass can reach 100%.
The specific embodiment
The present invention is further elaborated below in conjunction with embodiment, need to prove that the scope of intensification can be decided according to the formwork size:
Embodiment 1:
A kind of method of engine truck hot investment casting, it specifically comprises:
Chill is joined sand: be that chill is offered a concave surface with normal temperature iron, spread the normal sands casting at concave surface and use sodium silicate sand, sodium silicate sand to pave the smooth utensil of rear usefulness its pressing, compacting;
Coating: chill is joined sodium silicate sand surface spray one deck fireproof coating behind the sand;
Oven dry: adopt blowtorch that fireproof coating is dried to solidifying;
Formwork heats up: will be warming up to 300-600 degree centigrade for the formwork of casting engine truck;
Let cool iron: adopt magnet that chill is slowly put into the formwork die cavity after formwork heats up;
Cast: according to conventional method pour steel in the formwork, then obtain the engine truck foundry goods.
Claims (2)
1. the method for an engine truck hot investment casting, it is characterized in that: it specifically comprises:
Step 1: chill is joined sand: be that chill is offered a concave surface with normal temperature iron, spread normal sands casting water glass molding sand at concave surface, sodium silicate sand is paved the smooth utensil of rear usefulness its pressing, compacting;
Step 2: coating: with sodium silicate sand surface spray one deck fireproof coating of step 1;
Step 3: oven dry: adopt blowtorch that fireproof coating is dried to solidifying;
Step 4: formwork heats up: formwork is warming up to 300-600 degree centigrade;
Step 5: let cool iron: adopt magnet slowly to put into the formwork die cavity chill of step 3;
Step 6: cast: pour steel in the formwork then obtains the engine truck foundry goods.
2. the method for a kind of engine truck hot investment casting according to claim 1 is characterized in that: the described intensification scope of step 4 can decide according to the formwork size, usually follows little shell low temperature, the large principle of shell high temperature in the intensification scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105280476A CN102962436A (en) | 2012-12-11 | 2012-12-11 | Precision casting method of locomotive bogie |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105280476A CN102962436A (en) | 2012-12-11 | 2012-12-11 | Precision casting method of locomotive bogie |
Publications (1)
| Publication Number | Publication Date |
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| CN102962436A true CN102962436A (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105280476A Pending CN102962436A (en) | 2012-12-11 | 2012-12-11 | Precision casting method of locomotive bogie |
Country Status (1)
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| CN (1) | CN102962436A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252469A (en) * | 2013-05-28 | 2013-08-21 | 浙江佳力风能技术有限公司 | Modeling method for placing chilling block on vertical face of large casting |
| CN104439199A (en) * | 2014-11-21 | 2015-03-25 | 安徽涌诚机械有限公司 | Robot base and frame casting process |
| CN110722101A (en) * | 2019-10-25 | 2020-01-24 | 宁波开发区安德鲁精铸有限公司 | Production method of selection valve cylinder |
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| CN101797627A (en) * | 2009-02-06 | 2010-08-11 | 南方汇通股份有限公司 | Cold-iron magnetic adsorption method for core-shooting sand core upper die |
| CN201832951U (en) * | 2010-11-05 | 2011-05-18 | 广东省韶铸集团有限公司 | Sand-hung external chill |
| CN102139344A (en) * | 2011-03-15 | 2011-08-03 | 中核苏阀横店机械有限公司 | Wood pattern with chilling blocks |
| CN102441647A (en) * | 2011-12-08 | 2012-05-09 | 南车长江车辆有限公司 | Manufacturing method for fully-integrated core of side frame |
| WO2012158713A1 (en) * | 2011-05-17 | 2012-11-22 | Nevis Industries Llc | Side frame and bolster for a railway truck and method for manufacturing same |
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2012
- 2012-12-11 CN CN2012105280476A patent/CN102962436A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797627A (en) * | 2009-02-06 | 2010-08-11 | 南方汇通股份有限公司 | Cold-iron magnetic adsorption method for core-shooting sand core upper die |
| CN201832951U (en) * | 2010-11-05 | 2011-05-18 | 广东省韶铸集团有限公司 | Sand-hung external chill |
| CN102139344A (en) * | 2011-03-15 | 2011-08-03 | 中核苏阀横店机械有限公司 | Wood pattern with chilling blocks |
| WO2012158713A1 (en) * | 2011-05-17 | 2012-11-22 | Nevis Industries Llc | Side frame and bolster for a railway truck and method for manufacturing same |
| CN102441647A (en) * | 2011-12-08 | 2012-05-09 | 南车长江车辆有限公司 | Manufacturing method for fully-integrated core of side frame |
Non-Patent Citations (1)
| Title |
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| 陈梧本: "20SiMn铸钢构架的铸造", 《铸造技术》, no. 04, 30 April 1984 (1984-04-30), pages 2 - 5 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252469A (en) * | 2013-05-28 | 2013-08-21 | 浙江佳力风能技术有限公司 | Modeling method for placing chilling block on vertical face of large casting |
| CN104439199A (en) * | 2014-11-21 | 2015-03-25 | 安徽涌诚机械有限公司 | Robot base and frame casting process |
| CN110722101A (en) * | 2019-10-25 | 2020-01-24 | 宁波开发区安德鲁精铸有限公司 | Production method of selection valve cylinder |
| CN110722101B (en) * | 2019-10-25 | 2020-11-13 | 宁波开发区安德鲁精铸有限公司 | Production method of selection valve cylinder |
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Application publication date: 20130313 |