CN105447282A - Casting simulation system - Google Patents
Casting simulation system Download PDFInfo
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- CN105447282A CN105447282A CN201511035260.3A CN201511035260A CN105447282A CN 105447282 A CN105447282 A CN 105447282A CN 201511035260 A CN201511035260 A CN 201511035260A CN 105447282 A CN105447282 A CN 105447282A
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- 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
Abstract
The invention provides a casting simulation system which comprises a grid module, a temperature field solving module, a flow field solving module and a data visualization module. Firstly, grids are partitioned on the grid module though control of a CPU, then calculation is carried out through the temperature field solving module and the flow field solving module, and finally output is carried out through the data visualization module. By means of the casting simulation system, the pouring and solidifying process of castings can be visually seen. Before actual production, the optimal casting technological scheme can be designed through analog, and the castings high in quality and yield can be produced within the shortest time. Enterprises are helped to reduce cost and increase the profit percentage, and thus the market competitiveness of the casting enterprises is improved.
Description
Technical field
The invention belongs to computing machine casting process simulation field, especially relates to a kind of casting process simulation system.
Background technology
Classical way in modeling algorithm has the classical two-phase flow calculation procedure of SOLA-VOF (solutionalgorithmvolumeoffluid).OpenGL (entirely writing OpenGraphicsLibrary) defines a graphic package interface across the specialty of programming language, cross-platform DLL (dynamic link library) specification, it is for 3-D view (two dimension also can), be one powerful, call underlying graphics storehouse easily.
Simulator program about casting character has a lot, but more optimize more easily analogy method still constantly exploitation in.
Summary of the invention
In view of this, the invention is intended to propose a kind of casting process simulation system, more optimizes analogy method more easily to provide one.
For achieving the above object, the technical scheme of the invention is achieved in that
A kind of casting process simulation system, comprise mesh module, solution of Temperature module, flow field calculation module and data visualization module, control first at mesh module grid division by CPU, then in the calculating through solution of Temperature module and flow field calculation module, finally export from data visualization module.
Mesh module adopts boundary method to work out rule-based right angle hexahedral mesh unit.
Solution of Temperature module adopts explicit direct differential algorithm, adopts temperature recovery method and equivalent specific heat method to carry out latent heat process.
Flow field calculation module adopts SOLA-VOF method.
Data visualization module adopts OpenGL technology establishment figure, carries out Realistic representation, translation in real time, Rotation and Zoom conversion to subdivision grid pattern.
Further, mesh module adopts external seed filling algorithm to carry out mesh generation to same material non-interconnected region.
Further, in flow field calculation module, the motion conditions volume function of Free Surface is followed the tracks of, and adopts speed and the pressure boundary condition of volume conservation and principle of conservation of momentum process Free Surface.
Further, temperature field and field of flow adopt bidirectional coupled algorithm, and adopt temperature recovery method and equivalent specific heat method to carry out latent heat process.
Further, Shrinkage Prediction adopts the computation model that dynamic Isolated multiple melts judges, isolate melts equivalence liquid level descent method sets up shrinkage cavity shrinkage porosity, carries out quantitative forecast to the distribution situation of shrinkage cavity shrinkage porosity, size, position.
Relative to prior art, the casting process simulation system described in the invention has following advantage:
Casting pouring and process of setting can be seen intuitively.Before actual production, optimum casting process scheme can be designed by simulation, produce the foundry goods of high-quality, high yield rate with the shortest time.Help Reducing Cost in Enterprises, improve rate of profit, improve the market competitiveness of foundry enterprise.
The temperature variation in cavity filling process can be observed, the pressure of the liquid metal in the flow velocity of liquid metal and stowing operation by fluid calculation module.The situation of liquid metal by running gate system filling die cavity can be known by flow field simulation, whether rationally analyze foundry goods and Design of Runner System, and prediction with flow relevant as misrun, oxide slag inclusion, the defect such as to be mingled with.
Accompanying drawing explanation
The accompanying drawing of the part of formation the invention is used to provide the further understanding to the invention, and the schematic description and description of the invention, for explaining the invention, does not form the improper restriction to the invention.In the accompanying drawings:
Fig. 1 is the system architecture schematic diagram described in the invention embodiment;
Embodiment
It should be noted that, when not conflicting, the embodiment in the invention and the feature in embodiment can combine mutually.
Below with reference to the accompanying drawings and describe the invention in detail in conjunction with the embodiments.
HYCAST casting process simulation system adopts finite-difference algorithm, comprises mesh generation, solution of Temperature device, flow field calculation device and data visualization technique.
Mesh generation aspect, adopts up-to-date highly effective algorithm-boundary method to work out the automatic division program of rule-based right angle hexahedral mesh unit, and this algorithm subdivision speed is fast, and fault-tolerant processing is simple.Have versatility, can carry out mesh generation to three-dimensional foundry goods complicated arbitrarily, the grid pattern of formation can be similar to former entity with degree of precision.Program have employed " external seed filling algorithm ", enables this software carry out mesh generation to same material non-interconnected region, and can carry out the assembling subdivision of any multiple material.
Aspect, temperature field, adopts explicit direct differential method to calculate.Temperature recovery method and equivalent specific heat method is adopted to carry out latent heat process.The analog result of temperature calculation program to actual production foundry goods show and actual conditions substantially identical.In software interface exploitation, worked out complete pattern manipulation interface, mesh generation, Temperature calculating and data visualization integrate by this interface, define simple to operate, merit can completely casting temperature field evaluation simulation softward.
Field of flow aspect, adopts SOLA-VOF (solutionalgorithmvolumeoffluid) method of international popular, the features such as compared with other algorithms, it is high that the method has precision, and computing velocity is fast, the most applicable engineer applied.Wherein the motion conditions volume function of Free Surface is followed the tracks of, and adopts speed and the pressure boundary condition of volume conservation and principle of conservation of momentum process Free Surface, farthest ensures computational accuracy.
Coupling calculating aspect, can carry out the calculating bidirectional coupled of temperature field and field of flow, and adopt temperature recovery method and equivalent specific heat method to carry out latent heat process.
In Shrinkage Prediction, adopt the computation model that dynamic Isolated multiple melts judges, isolate melts equivalence liquid level descent method sets up shrinkage cavity shrinkage porosity, quantitative forecast can be carried out to the distribution situation of shrinkage cavity shrinkage porosity, size, position.
Cold shut defects, is calculated by the coupling of temperature field and field of flow, and when the fraction solid in liquid metal is greater than critical fraction solid, molten metal just stops flowing, forms cold shut.
Data visualization aspect, adopts current state-of-the-art OpenGL technology, has worked out complete graphic display program.Program has carries out the functions such as Realistic representation, in real time translation, rotation, scale transformation to subdivision grid pattern.Meanwhile, this program can also show stl file to observe the 3D solid of foundry goods, and tentatively achieves the Dynamic Announce to casting solidification process.
HYCAST soft material storehouse comprises hundreds of alloy material and correlation performance parameters thereof.The casting technique of the various alloy materials such as casting pig, spheroidal-graphite cast iron, cast steel, aluminium, copper, magnesium, nickel-base alloy can be simulated.
HYCAST can simulate green-sand casting, Chemical Felter sand casting (resin sand, sodium silicate sand etc.), investment cast and gravity die casting process.Riser buss (insulation or heating) can be simulated, chill, coverture, cooling duct, the effect of heating arrangement and other minor handicrafts.
HYCAST adopts general model file interface (STL), can import model from all Three-dimensional Design Software (as UG, Proe, Catia, Solidworks etc.).
Casting pouring and process of setting can be seen intuitively by HYCAST.Before actual production, optimum casting process scheme can be designed by simulation, produce the foundry goods of high-quality, high yield rate with the shortest time.Help Reducing Cost in Enterprises, improve rate of profit, improve the market competitiveness of foundry enterprise.
The temperature variation in cavity filling process can be observed, the pressure of the liquid metal in the flow velocity of liquid metal and stowing operation by fluid calculation module.The situation of liquid metal by running gate system filling die cavity can be known by flow field simulation, whether rationally analyze foundry goods and Design of Runner System, and prediction with flow relevant as misrun, oxide slag inclusion, the defect such as to be mingled with.
This casting process simulation systematic difference scope is as follows:
Multiclass alloy material: comprise cast steel class, aluminium alloy class, magnesium alloy class, kirsite class, titanium alloy class, copper alloys;
Multiple casting method: comprise sand casting, permanent mold casting, investment cast etc.;
That can simulate whole casting process fills type and curdled appearance;
The multicycle of permanent mold casting, multistage full-range analysis can be carried out, and take into full account the various complicated cooling condition of the different heat eliminating mediums such as water, oil, gas;
" thermal capacitance is amassed " method the most accurately is the most at present adopted to calculate gravity feeding, can the forming process of direct accurate simulation shrinkage cavity shrinkage porosity, achieve the quantitative simulation of the position of shrinkage cavity shrinkage porosity, shape and size;
Simulation casting process is rolled up gas, is mingled with forming process, predicts corresponding defect, optimizing pouring system, pouring technology and structural design.
The foregoing is only the preferred embodiment of the invention; not in order to limit the invention; within all spirit in the invention and principle, any amendment done, equivalent replacement, improvement etc., within the protection domain that all should be included in the invention.
Claims (5)
1. a casting process simulation system, it is characterized in that: comprise mesh module, solution of Temperature module, flow field calculation module and data visualization module, control first at mesh module grid division by CPU, then in the calculating through solution of Temperature module and flow field calculation module, finally export from data visualization module;
Mesh module adopts boundary method to work out rule-based right angle hexahedral mesh unit,
Solution of Temperature module adopts explicit direct differential algorithm, adopts temperature recovery method and equivalent specific heat method to carry out latent heat process,
Flow field calculation module adopts SOLA-VOF method,
Data visualization module adopts OpenGL technology establishment figure, carries out Realistic representation, translation in real time, Rotation and Zoom conversion to subdivision grid pattern.
2. casting process simulation system according to claim 1, is characterized in that: mesh module adopts external seed filling algorithm to carry out mesh generation to same material non-interconnected region.
3. casting process simulation system according to claim 1, is characterized in that: in flow field calculation module, the motion conditions volume function of Free Surface is followed the tracks of, and adopts speed and the pressure boundary condition of volume conservation and principle of conservation of momentum process Free Surface.
4. casting process simulation system according to claim 1, is characterized in that: temperature field and field of flow adopt bidirectional coupled algorithm, and adopts temperature recovery method and equivalent specific heat method to carry out latent heat process.
5. casting process simulation system according to claim 1, it is characterized in that: Shrinkage Prediction adopts the computation model that dynamic Isolated multiple melts judges, isolate melts equivalence liquid level descent method sets up shrinkage cavity shrinkage porosity, quantitative forecast is carried out to the distribution situation of shrinkage cavity shrinkage porosity, size, position.
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| CN201511035260.3A CN105447282A (en) | 2015-12-31 | 2015-12-31 | Casting simulation system |
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| CN201511035260.3A CN105447282A (en) | 2015-12-31 | 2015-12-31 | Casting simulation system |
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| CN105447282A true CN105447282A (en) | 2016-03-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014973A (en) * | 2017-03-30 | 2017-08-04 | 华中科技大学 | A kind of gravitational casting shrinkage cavity defect detection method based on dynamic pressure |
| CN109992813A (en) * | 2018-11-27 | 2019-07-09 | 湖州中联机械制造有限公司 | New energy cogeneration machine suction end body casting technique design method |
| CN114029449A (en) * | 2021-10-15 | 2022-02-11 | 宜昌船舶柴油机有限公司 | Casting method of heavy-duty gas turbine diffusion casing casting |
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| CN1388444A (en) * | 2001-05-25 | 2003-01-01 | 中国科学院金属研究所 | Simulation method of casting cavity filling process |
| CN101567019A (en) * | 2009-05-08 | 2009-10-28 | 江苏大学 | Computer simulation method for casting property of particle-reinforced aluminum matrix composite |
| US20110144788A1 (en) * | 2009-12-16 | 2011-06-16 | Gm Global Technology Operations, Inc. | Method for simulating casting defects and microstructures of castings |
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2015
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Patent Citations (3)
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| CN1388444A (en) * | 2001-05-25 | 2003-01-01 | 中国科学院金属研究所 | Simulation method of casting cavity filling process |
| CN101567019A (en) * | 2009-05-08 | 2009-10-28 | 江苏大学 | Computer simulation method for casting property of particle-reinforced aluminum matrix composite |
| US20110144788A1 (en) * | 2009-12-16 | 2011-06-16 | Gm Global Technology Operations, Inc. | Method for simulating casting defects and microstructures of castings |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014973A (en) * | 2017-03-30 | 2017-08-04 | 华中科技大学 | A kind of gravitational casting shrinkage cavity defect detection method based on dynamic pressure |
| CN107014973B (en) * | 2017-03-30 | 2019-01-29 | 华中科技大学 | A kind of gravitational casting shrinkage cavity defect detection method based on dynamic pressure |
| CN109992813A (en) * | 2018-11-27 | 2019-07-09 | 湖州中联机械制造有限公司 | New energy cogeneration machine suction end body casting technique design method |
| CN114029449A (en) * | 2021-10-15 | 2022-02-11 | 宜昌船舶柴油机有限公司 | Casting method of heavy-duty gas turbine diffusion casing casting |
| CN114029449B (en) * | 2021-10-15 | 2024-04-16 | 宜昌船舶柴油机有限公司 | Casting method of heavy gas turbine diffusion casing casting |
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