CN102608138A - Precise casting mold filling and solidification process dynamic imaging method based on dual-source CT - Google Patents
Precise casting mold filling and solidification process dynamic imaging method based on dual-source CT Download PDFInfo
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- CN102608138A CN102608138A CN2012100462798A CN201210046279A CN102608138A CN 102608138 A CN102608138 A CN 102608138A CN 2012100462798 A CN2012100462798 A CN 2012100462798A CN 201210046279 A CN201210046279 A CN 201210046279A CN 102608138 A CN102608138 A CN 102608138A
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Abstract
The invention aims at providing a precise casting mold filling and solidification process dynamic imaging method based on dual-source CT. Specifically, the method comprises the steps that: (1) two sets of X-ray source generating apparatuses and two sets of detector systems are arranged on a same plane with certain angles, and synchronic scanning is carried out; (2) the rays emitted by the two sets of X-ray sources penetrate the casting in a mold filling and solidification process, and are received by corresponding detectors; (3) the data collected by the detectors are transmitted to a central computer processor; with the central computer processor, according to the characteristics of the casting, the two sets of data are integrated, and are subject to three dimensional reconstruction, such that three dimensional dynamic image information of the liquid state metal in the mold filling and solidification process is obtained.
Description
One, technical field
The present invention relates to a kind of dynamic imaging method, relate more particularly to a kind of precision casting and fill type process of setting dynamic imaging method based on double source CT to precision casting.
Two, background technology
Precision casting has characteristics such as profile complex structure, die cavity complicacy, thin-walled, and is strict to dimensional accuracy, surface quality, inherent quality, and the strict control of precision casting technology is solidified with control and is shaped.Mobile and the process of setting of liquid metal in injection molding is unobservable, and the stepless control of implementation procedure is difficulty very.Conventional research method is to cool off fast at process of setting, tries hard to keep the institutional framework of curdled appearance, analyzes subsequently, and this research method does not have to observe directly, continuously the real process of metal freezing.
X ray has the ability that penetrates opaque article and observe the interior of articles institutional framework, can be used for directly, the process of setting of home position observation metal.Therefore; In hot investment casting, adopt X ray real time imagery method at present; The three-dimensional body inner structure is projected into two dimensional image; But adopting the defective of x radial imaging method to be, is that therefore two dimensional image can not obtain the molten metal three-dimensional information of process that flows because projection goes out, and then can't estimate molten metal in the casting process and flow and solidify details.To this technology; The three-dimensional chromatographic technique of X ray has also appearred in recent years; This technology have can viewing optics opaque article interior three-dimensional structure ability, but owing to limited by conventional tomographic system scan mode and single radiographic source, performing poor aspect the dynamic continuous process observing.And computerized tomography technology (CT) can realize the 3d dynamic view of metal material casting process, also is that new technology and the new method that is shaped with control solidified in control.
Three, summary of the invention
The objective of the invention is to solve and use traditional formation method can't observe the problem that precision casting fills the type process of setting directly, continuously; And time, space and the density resolution of improvement imaging; Thereby make and more directly understand liquid metal flowing and process of setting in injection molding, guidance is provided for improving precision casting technology.
To achieve these goals; The present invention provides a kind of precision casting based on double source CT to fill type process of setting dynamic imaging method to it is characterized in that: 1) adopt two cover x-ray source generating meanss and two cover detector systems to install at an angle at grade, carry out synchronous scanning; 2) ray of two cover x-ray sources emissions penetrates and is in the foundry goods that fills in the type process of setting and is received by corresponding detector; The data of 3) detector being gathered are imported in the central processing unit, processor according to the characteristics of foundry goods itself with two groups of data integration and carry out three-dimensionalreconstruction, thereby obtain the Three-Dimensional Dynamic image information of liquid metal in filling type, process of setting.
Preferably, the ray of two cover x-ray source emissions has identical energy.
Preferably, the ray of two cover x-ray source emissions has different energy.
Preferably, described central processing unit is a computing machine.
Advantage of the present invention is, can improve temporal resolution, spatial resolution and the density resolution of the imaging of precision casting process, can observe and monitor flowing and process of setting of molten metal in the precision casting moulding by casting meticulousr, more continuously.
Four, description of drawings
Fig. 1 is for using the system construction drawing of method described in the invention.
Five,
Embodiment
As shown in Figure 1; The present invention realizes like this; The type process of setting that fills of precision casting 3 carries out on rotary table 4; Its motion receives the control of kinetic control system 6; The X ray that two radiographic sources in a certain angle 1 send penetrates precision casting 3 backs and is received by corresponding flat panel detector 2, and the two-dimentional strength information after the decay is sent in the computing machine 8 after converting digital signal into by data acquisition system (DAS) 5, rotation angle information and the data of two group flat panel detectors 2 of computing machine 8 through combining kinetic control system 6; Structure and actual needs according to precision casting 3 carry out continuous three-dimensional reconstruct to the precision casting 3 that fills in the type process of setting, then to the whole different restructuring analysises constantly of type process of setting that fill to study various variations in the whole process.
Claims (4)
1. the precision casting based on double source CT fills type process of setting dynamic imaging method, it is characterized in that: carry out work according to following steps
1) adopts two cover x-ray source generating meanss and two cover detector systems to install at an angle at grade, carry out synchronous scanning;
2) ray of two cover x-ray sources emissions penetrates and is in the foundry goods that fills in the type process of setting and is received by corresponding detector;
The data of 3) detector being gathered are imported in the central processing unit, processor according to the characteristics of foundry goods itself with two groups of data integration and carry out three-dimensionalreconstruction, thereby obtain the Three-Dimensional Dynamic image information of liquid metal in filling type, process of setting.
2. the precision casting based on double source CT as claimed in claim 1 fills type process of setting dynamic imaging method, and wherein the ray of two cover x-ray source emissions has identical energy.
3. the precision casting based on double source CT as claimed in claim 1 fills type process of setting dynamic imaging method, and wherein the ray of two cover x-ray source emissions has different energy.
4. the precision casting based on double source CT as claimed in claim 1 fills type process of setting dynamic imaging method, and wherein said central processing unit is a computing machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100462798A CN102608138A (en) | 2012-02-28 | 2012-02-28 | Precise casting mold filling and solidification process dynamic imaging method based on dual-source CT |
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| CN2012100462798A CN102608138A (en) | 2012-02-28 | 2012-02-28 | Precise casting mold filling and solidification process dynamic imaging method based on dual-source CT |
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| CN102608138A true CN102608138A (en) | 2012-07-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104239004A (en) * | 2013-06-08 | 2014-12-24 | 上海联影医疗科技有限公司 | General X-ray collecting system |
| CN104865139A (en) * | 2015-06-01 | 2015-08-26 | 南昌航空大学 | Fatigue crack three-dimensional expansion comparative analysis method for off-line CT detection condition |
| CN111426707A (en) * | 2020-05-11 | 2020-07-17 | 西安近代化学研究所 | Real-time observation device for solidification and forming process of fusion cast explosive slurry |
| CN112683934A (en) * | 2020-12-04 | 2021-04-20 | 重庆大学 | X-ray source static CT imaging system and method based on electron beam scanning |
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| CN1631580A (en) * | 2004-12-24 | 2005-06-29 | 中国科学院金属研究所 | Improved structure of three dimensional X-ray monitoring device and its application |
| CN101231254A (en) * | 2007-01-24 | 2008-07-30 | 清华大学 | Double source three-dimensional image forming method and system |
| CN101296658A (en) * | 2005-04-25 | 2008-10-29 | 北卡罗来纳大学查珀尔希尔分校 | X-ray imaging system using temporal digital signal processing |
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2012
- 2012-02-28 CN CN2012100462798A patent/CN102608138A/en active Pending
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| CN1631580A (en) * | 2004-12-24 | 2005-06-29 | 中国科学院金属研究所 | Improved structure of three dimensional X-ray monitoring device and its application |
| CN101296658A (en) * | 2005-04-25 | 2008-10-29 | 北卡罗来纳大学查珀尔希尔分校 | X-ray imaging system using temporal digital signal processing |
| CN101231254A (en) * | 2007-01-24 | 2008-07-30 | 清华大学 | Double source three-dimensional image forming method and system |
Non-Patent Citations (3)
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| MARK M. HYTROS等: "High-Energy X-Ray Computed Tomography of the Progression of the Solidification Front in Pure Aluminum", 《METALLURGICAL AND MATERIALS TRANSACTIONS A》, vol. 30, 31 May 1999 (1999-05-31), XP019693103 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104239004A (en) * | 2013-06-08 | 2014-12-24 | 上海联影医疗科技有限公司 | General X-ray collecting system |
| CN104239004B (en) * | 2013-06-08 | 2019-05-31 | 上海联影医疗科技有限公司 | A kind of general X-ray acquisition system |
| CN104865139A (en) * | 2015-06-01 | 2015-08-26 | 南昌航空大学 | Fatigue crack three-dimensional expansion comparative analysis method for off-line CT detection condition |
| CN104865139B (en) * | 2015-06-01 | 2017-09-01 | 南昌航空大学 | A kind of fatigue crack three-dimensional extended comparative analysis method being used under offline CT testing conditions |
| CN111426707A (en) * | 2020-05-11 | 2020-07-17 | 西安近代化学研究所 | Real-time observation device for solidification and forming process of fusion cast explosive slurry |
| CN112683934A (en) * | 2020-12-04 | 2021-04-20 | 重庆大学 | X-ray source static CT imaging system and method based on electron beam scanning |
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