CN107977514A - A kind of method for preventing nodular iron casting slag inclusion - Google Patents
A kind of method for preventing nodular iron casting slag inclusion Download PDFInfo
- Publication number
- CN107977514A CN107977514A CN201711242681.2A CN201711242681A CN107977514A CN 107977514 A CN107977514 A CN 107977514A CN 201711242681 A CN201711242681 A CN 201711242681A CN 107977514 A CN107977514 A CN 107977514A
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- CN
- China
- Prior art keywords
- slag inclusion
- casting
- nodular iron
- ingate
- iron casting
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a kind of method for preventing nodular iron casting slag inclusion, the sand casting suitable for spheroidal graphite cast-iron exhaust pipe produces, system for casting and pouring design.By using ProCAST simulation-analysis softwares, running gate system is analyzed, is judged, optimization can be to avoid slag inclusion problem.
Description
Technical field
The invention belongs to the sand casting life of component of machine casting technology field, more particularly to spheroidal graphite cast-iron exhaust pipe
Production, system for casting and pouring design field.
Background technology
Exhaust manifold, is connected with engine cylinder block, and the exhaust of each cylinder is put together importing exhaust main, is carried
The pipeline of difference.Requirement to it is mainly to have enough heatproofs, intensity and service life, smooth in exhaust.When product occur stomata,
During the defects of slag inclusion, the resistance of exhaust will be increased, and then reduce the output power of engine, influence product appearance quality, drop
The intensity of low product, influences service life.
The main development and production auto parts and components-engine exhaust of my company, since product structure is complicated, belongs to thin
Wall pieces, the quality of system for casting and pouring, has a significant impact the quality of product.
Design of Runner System is unreasonable, and pushing off the slag effect is poor, can cause casting burning into sand dreg defect.This casting flaw is suitable
A period of time annoyings related technical personnel, and the annual loss of company is up to a million.
The patent document of Publication No. CN1873401A discloses a kind of nodular iron casting shrinkage cavity defect based on finite element
Forecasting Methodology, analyzes nodular iron casting using the processing simulation ProCAST based on finite element, and type and temperature field are filled in acquirement
Study document；Unit solid rate, unit volume and eutectic expansion rate is calculated；To starting step carry out successively closing area searching,
To carrying out isolated area searching in enclosed area, and carry out the calculating of total cavity expansion value；Next step search is carried out again, and circulation is until complete
Into all search for calculating step；Isolated region that is newborn and deriving from is subjected to the calculating of cumulative volume changing value and is exported, according to the volume
The position of volume, isolated region when changing value and isolated region initially form can carry out quantification to the shrink defects of the casting
Judge.The present invention considers graphitization expansion and the widened influence of cavity, and it is pre- can to carry out quantification to nodular iron casting shrinkage cavity defect
Survey, solve the problem that analysis in processing simulation judges defect, exact basis for forecasting is provided for engineering produce reality.
The technical problem that above-mentioned document solves is different with the application, sentences mainly for the shrink defects progress quantification of casting
It is disconnected, slag inclusion problem existing in the prior art can not effectively be handled.
The patent document of Publication No. CN102819651A discloses a kind of single crystal turbine blade essence casting work based on emulation
Skill parameter optimization method, for solving the technology of existing single crystal turbine blade precision casting technology parameter optimization method effect of optimization difference
Problem.Technical solution is by designing single crystal turbine blade running gate system model, using finite element method to running gate system
Model carries out dividing elements, is obtained to blade precision casting technology parameter extraction and discrimination, and by single factor test engineer testing to essence casting
The precision casting technology parameter and Reasonable Parameters excursion that blade profile dimensional accuracy has a great influence；According to the test card of foundation into
The numerical simulation of row casting process；By data process＆analysis, assessment casting passes through relative to the deformation to design a model
BP neural network model is established, using small step-length searching method is used, the search model of precision casting technology parameter optimization is gradually reduced
Enclose.Improve the effect of optimization of single crystal turbine blade precision casting technology parameter optimization method.
The technical problem and the technological means of use that document above solves cannot all be directed to spheroidal graphite existing in the prior art
Cast iron slag inclusion problem makes answer, and using complicated neutral net and finite element method, in the actual manufacturing
Middle application is restricted, and the solution of the technical problem in the field, and actual casting process can not be instructed to disconnect.
The content of the invention
In order to solve the problems, such as present in above-mentioned background technology, the present invention provides a kind of side for preventing nodular iron casting slag inclusion
Method, by using ProCAST simulation-analysis softwares, analyzes running gate system, judge, optimization, can to avoid slag inclusion problem,
It is easy to operate, friendly interface, significant effect.
A kind of method for preventing nodular iron casting slag inclusion, castings material are spheroidal graphite cast-iron, and foundry production line is sand casting.
Casting Technology Design, FCL iron liquid 20 ~ 60kg of weight, 1380 DEG C ~ 1560 DEG C of pouring temperature, the duration of pouring is in 6 ~ 10sec scopes
It is interior.
According to ProCAST software simulative optimization running gate systems, according to following Technology design, Resolving probiems.
Simulation result analysis, speed colour code are arranged in the range of 0 ~ 1.5 m/sec, and when iron liquid flow velocity≤0.2m/s is rendered as
Pink, iron liquid in casting process, into riser before cannot have parabola effect, answer it is adherent fill type, exist all the time in cavity filling process
There is pink intermediate layer before riser neck.
When simulation cannot meet, running gate system is designed as follows：
1：Design of Runner System, using rising pouring or middle note；Avoid iron liquid turbulent in cavity, oxide inclusion.
2：Running gate system, cross gate sectional area are less than down gate sectional area；Down gate can be made to be kept in casting process
Full state, there is scum silica frost effect.
3：Ingate front end is less than cross gate, and there is scum silica frost pack arrangement in front end；Avoid cross gate scum silica frost enter ingate and
Cavity.
4：Ingate tail end ensures that riser base and ingate are round and smooth tangent；Iron liquid is not splashed when entering riser base.
5：Ingate is kept on one wire with casting into burner.The loss of iron liquid energy of flow is small, reduces flow-disturbing
Compared with prior art, beneficial effects of the present invention are as follows：Casting dreg defect is eliminated, improves product quality and finished product
Rate, shortens product development cycle, reduces manufacture cost.
Brief description of the drawings
The schematic diagram of the running gate system of Fig. 1 present invention；
The side view of the running gate system of Fig. 2 present invention；
The slag inclusion figure that Fig. 3 tradition running gate system is formed；
Fig. 4 the method for the present invention formed without slag inclusion product figure.
Embodiment
For a better understanding of the present invention, present disclosure, but this hair are further fairly set out with reference to embodiment
Bright protection content is not limited solely to the following examples.In the following description, give a large amount of concrete details so as to
More thorough understanding of the invention is provided.It will be apparent, however, to one skilled in the art that the present invention can be with
It is carried out without one or more of these details.
Embodiment 1
As shown in Figure 1, a kind of running gate system disclosed by the invention, 2 sectional area of cross gate is less than 1 sectional area of down gate, ingate 3
Remained at roughly with casting into burner 5 on a line.As shown in Fig. 2, 3 front end of ingate is less than cross gate 2, there is scum silica frost bag in front end
Structure, ingate tail end ensure that riser base and ingate are tangent.
Such as Fig. 3, there is slag inclusion in the running gate system of slag inclusion state, and conventional runner system uses top pouring type, and iron liquid is in cavity
Turbulent flow is formed, core is impacted, oxide slag inclusion can be produced.Running gate system is using open, and cross gate sectional area is more than down gate, directly
Cast gate may be not fully filled in casting process, not have scum silica frost effect.Ingate is in cross gate bottom, the screenings of iron liquid stream head
Cavity may be entered.For ingate above cross gate, cross gate scum silica frost may enter cavity.Design of Runner System does not conform to
Reason, iron liquid flowing can be presented flat throwing phenomenon, can cause oxide slag inclusion.Ingate and excessive into flow velocity between burner.Flow velocity is excessive
The probability of sand washing can be increased, screenings can enter casting with iron liquid, the collection sand after sand washing can not discharge, formed in casting folder it is husky or
Dreg defect.
Using the running gate system of ProCAST sunykatuib analysis slag inclusion states, it is found that flow velocity is arranged in the range of 0 ~ 1.5 m/sec
When, casting slag inclusion position, fails to be rendered as the visual effect of " blue-pink-blue ".We are in ProCAST software application processes
In done substantial amounts of analysis researching test, summarized by the actual effect analyzing and test, finally draw this parameter and judgement side
Method.No matter to any running gate system, occurs this analytical effect after optimized, casting is all without appearance folder sand or dreg defect.
Comparative simulation reduces cross gate sectional area as a result, optimizing pouring system, will by ingate with being adjusted on one wire into burner
There is the visual effect of " blue-pink-blue ", actual life in the arc chord angle of R25mm, sunykatuib analysis between ingate and riser base
Production product slag inclusion problem is solved, such as Fig. 4.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, this area is common
Other modifications or equivalent substitution that technical staff makes technical scheme, without departing from technical solution of the present invention
Spirit and scope, should all cover among scope of the presently claimed invention.
Claims (5)
- A kind of 1. method for preventing nodular iron casting slag inclusion, it is characterised in that step is as follows：ProCAST simulative optimization running gate systems, speed colour code are arranged in the range of 0 ~ 1.5 m/sec, iron liquid flow velocity≤0.2m/s When be rendered as pink, iron liquid in casting process, into riser before prevent parabola effect, answer it is adherent fill type, in cavity filling process All the time pink intermediate layer is included before riser neck.
- 2. a kind of method for preventing nodular iron casting slag inclusion as claimed in claim 1, it is characterised in that when simulation cannot meet Shi Jinhang optimization Design of Runner System.
- A kind of 3. method for preventing nodular iron casting slag inclusion as claimed in claim 2, it is characterised in that using rising pouring or in Note.
- 4. a kind of method for preventing nodular iron casting slag inclusion as claimed in claim 3, it is characterised in that cross gate sectional area is small In down gate sectional area；Ingate front end is less than cross gate and has scum silica frost pack arrangement.
- 5. a kind of method for preventing nodular iron casting slag inclusion as claimed in claim 3, it is characterised in that riser base and ingate Rounding off, ingate keep coaxial with casting into burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711242681.2A CN107977514A (en) | 2017-11-30 | 2017-11-30 | A kind of method for preventing nodular iron casting slag inclusion |
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| CN201711242681.2A CN107977514A (en) | 2017-11-30 | 2017-11-30 | A kind of method for preventing nodular iron casting slag inclusion |
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| CN107977514A true CN107977514A (en) | 2018-05-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113319254A (en) * | 2021-05-06 | 2021-08-31 | 北京鼎匠科技发展有限公司 | Pouring system for regulating and controlling flow velocity of liquid metal in each pouring section and pouring process thereof |
Citations (2)
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|---|---|---|---|---|
| CN101643877A (en) * | 2008-09-27 | 2010-02-10 | 莱州新忠耀机械有限公司 | High-speed train set with power car pulling motor shell new material and preparation method thereof |
| CN107186175A (en) * | 2017-05-27 | 2017-09-22 | 大连华锐重工集团股份有限公司 | A kind of casting technique of CAP1400 cores main pump pump case |
-
2017
- 2017-11-30 CN CN201711242681.2A patent/CN107977514A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643877A (en) * | 2008-09-27 | 2010-02-10 | 莱州新忠耀机械有限公司 | High-speed train set with power car pulling motor shell new material and preparation method thereof |
| CN107186175A (en) * | 2017-05-27 | 2017-09-22 | 大连华锐重工集团股份有限公司 | A kind of casting technique of CAP1400 cores main pump pump case |
Non-Patent Citations (5)
| Title |
|---|
| CHEN BING 等: "Optimization of Pouring Process and Gating System by Mold Filling Simulation", 《FOUNDRY》 * |
| 张立华 等: "大型轧钢机架铸造过程数值模拟分析", 《广西大学学报：自然科学版》 * |
| 朱先勇: "中大型冲压件模具用球墨铸铁材料及其近终成型工艺研究", 《中国博士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 郑志伟 等: "基于ProCAST等温淬火球墨铸铁车轮浇注系统的改进", 《铸造》 * |
| 陈冰 等: "从充型模拟看浇注和浇注系统", 《第16届全国反应堆结构力学会议论文集》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113319254A (en) * | 2021-05-06 | 2021-08-31 | 北京鼎匠科技发展有限公司 | Pouring system for regulating and controlling flow velocity of liquid metal in each pouring section and pouring process thereof |
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Application publication date: 20180501 |