CN201308985Y - Low-voltage pulse magnetic field coagulation device - Google Patents
Low-voltage pulse magnetic field coagulation device Download PDFInfo
- Publication number
- CN201308985Y CN201308985Y CNU2008202317891U CN200820231789U CN201308985Y CN 201308985 Y CN201308985 Y CN 201308985Y CN U2008202317891 U CNU2008202317891 U CN U2008202317891U CN 200820231789 U CN200820231789 U CN 200820231789U CN 201308985 Y CN201308985 Y CN 201308985Y
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- Prior art keywords
- magnetic field
- low
- voltage pulse
- pulsed magnetic
- action
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- 230000015271 coagulation Effects 0.000 title claims abstract description 26
- 238000005345 coagulation Methods 0.000 title claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000009776 industrial production Methods 0.000 abstract description 4
- 238000007670 refining Methods 0.000 abstract description 3
- 230000008520 organization Effects 0.000 abstract 3
- 229910045601 alloy Inorganic materials 0.000 description 20
- 239000000956 alloy Substances 0.000 description 20
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- 238000007711 solidification Methods 0.000 description 14
- 230000008023 solidification Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 108010022579 ATP dependent 26S protease Proteins 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000007531 graphite casting Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 230000005426 magnetic field effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model relates to a low-voltage pulse magnetic field coagulation device for refining metallic coagulation organization, belongs to metallic coagulation organization control equipment field, and solves the problems of over high power output, large size, poor safety and reliability, and difficult application in industrial production in current technology. The low-voltage pulse magnetic field coagulation device comprises a pulse magnetic field generating system and a pulse magnetic field action system, wherein the pulse magnetic field action system comprises a magnetic field coil and an insulating die which is arranged on the inner side of the magnetic field coil, and the pulse magnetic field generating system is connected with the pulse magnetic field generating system through the magnetic field coil. Employing a charge-discharge mode, the low-voltage pulse magnetic field coagulation device is characterized by low charging voltage, high frequency property, safety operation, long effective operational time during metallic coagulation process, thorough control action to metallic coagulation organization, small size and low cost, which is adaptable to laboratory scientific studies and small-scale industrial production.
Description
Technical field
The utility model relates to a kind of action of low-voltage pulse magnetic field coagulation system of thinning metal solidification texture, belongs to metal solidification texture control equipment field.
Background technology
The performance of casting alloy depends mainly on its solidified structure, and the alloy graining of conventional cast is organized general arborescent structure prosperity, and grain structure is thick, causes alloy property not high.Thereby adopt various means control process of setting with thinning solidification structure, become the important content of metal freezing area research.Traditional metal solidification texture thinning method is more, handle as metal bath is rotten, but this method can cause the pollution to molten metal and environment inevitably; By adjusting solidifying process, as improving cooling rate, reduction pouring temperature etc. can obtain better effects under certain condition, but all restricted condition, as the large scale casting solidification being difficult to realize higher cooling rate, can reduce the liquid metal filling ability and reduce pouring temperature, cause casting flaws such as cold shut.
Adopting outfield control metal solidification process is the important research direction in the field of solidifying in recent years, and wherein pulsed magnetic field solidifies as a kind of novel solidification technology and causes increasing concern.Studies show that, under pulsed magnetic field action, solidify and to produce significant refining effect to metal solidification texture.Because pulsed magnetic field action has the noncontact characteristics, pollution-free to metal bath, and the parameter of pulsed magnetic field can adjust at any time, be convenient to realize effective control to process of setting.At present, pulsed magnetic field action focuses mostly in the strong pulsed magnetic field aspect in Study of Solidification Process, and peak field intensity is greater than 1B, magnetic induction intensity is greater than 1T, discharge and recharge pulse frequency and be no more than 3Hz, be used to produce the overtension of pulsed magnetic field, crest voltage is generally several kilovolts to several ten thousand volts.Therefore, required power is too high, and is bulky, and security reliability is poor, applies difficulty in industrial production.
The utility model content
The low voltage pulse magnetic field coagulation system that provides a kind of volume little, safe and reliable is provided the purpose of this utility model, with the control metal solidification process, obtain the solidified structure of refinement, power is too high in the solution prior art, bulky, security reliability is poor, applies problems such as difficulty in industrial production.
The technical solution of the utility model is as follows:
A kind of action of low-voltage pulse magnetic field coagulation system, this device is provided with pulsed magnetic field generation systems, pulsed magnetic field action system, the pulsed magnetic field action system comprises insulation mould, field coil, the insulation mould places the field coil inboard, and the pulsed magnetic field generation systems links to each other with the pulsed magnetic field generation systems by field coil.
Described action of low-voltage pulse magnetic field coagulation system bears high temperature for fear of coil, is provided with water cooling plant between insulation mould and field coil.
Described action of low-voltage pulse magnetic field coagulation system, pulsed magnetic field generation systems adopt charge and discharge mode, are divided into three parts, i.e. charge circuit, discharge loop and control section, and charge circuit, discharge loop link to each other with control section respectively.
Described action of low-voltage pulse magnetic field coagulation system, charge circuit are the loop of constant flow module, capacitor group, charge switch series connection formation; Discharge loop is the loop of capacitor group, discharge switch, current-limiting resistance, inductance coil series connection formation; Control section is is mainly connected and composed with charge switch, discharge switch respectively by the programmable functions module.
Described action of low-voltage pulse magnetic field coagulation system, discharge switch is the controllable silicon discharge switch, this switch is connected with the programmable functions module by thyristor gating circuit.
Described action of low-voltage pulse magnetic field coagulation system in order to eliminate the influence of inductance coil induced electromotive force to circuit, obtains stable pulse, at the inductance coil two ends inductance coil bypass is set.
The utlity model has following characteristics:
1, the remarkable solidified structure of fining metal material of the utility model.
2, the utility model charging voltage is low, and handling safety is reliable.
3, the utility model is simple in structure, volume is little, and cost is low, and is applied widely.
4, pollution-free.Because the not direct contact alloy melt of pulsed magnetic field action can not produce alloy and pollute, and also can not produce environment and pollute.
Description of drawings
Fig. 1 is pulsed magnetic field generation systems circuit theory diagrams of the present utility model.
Fig. 2 is the pulsed magnetic field action system construction drawing.Among the figure, 1 alloy melt; 2 insulation moulds; 3 water cooling plants; 4 pulsed magnetic field coils; 5 pulsed magnetic field generation systems.
The comparison diagram of pure magnesium microscopic structure when Fig. 3 solidifies with routine for the utility model: wherein (a) be not for applying pulsed magnetic field; (b) for applying pulsed magnetic field.
The K417 high temperature alloy solidified the comparison diagram of microscopic structure when Fig. 4 solidified with routine for the utility model: wherein (a) be not for applying pulsed magnetic field; (b) for applying pulsed magnetic field.
The specific embodiment
The utility model comprises pulsed magnetic field generation systems, two parts of pulsed magnetic field action system, the pulsed magnetic field generation systems is connected with the pulsed magnetic field action system, the pulsed magnetic field that is produced by the pulsed magnetic field generation systems is applied on the metal bath, realizes the alloy graining structure refinement.
26S Proteasome Structure and Function with regard to system is described in detail below.
1, pulsed magnetic field generation systems
As shown in Figure 1, the utility model pulsed magnetic field generation systems 5 adopts charge and discharge mode to realize that pulsed magnetic field takes place, and can be divided into three parts, i.e. charge circuit, discharge loop and control section.
1. charge circuit is by constant flow module U
0, capacitor group C, charge switch K
1Constitute Deng series connection.Wherein, constant flow module U
0Power is 15kW, changes the 380V alternating current into the 450V direct current, constant flow module U
0Gauge tap as the charge switch K of charge circuit
1, capacitor group C is made up of some oil immersion electric capacity, the highest withstand voltage be 1000V, total capacity is 1600 μ F, and for example: adopt 4 withstand voltage 1000V, capacity is that the big capacity oil immersion electric capacity of 400 μ F is connected in parallel, realization discharges and recharges, bigger if desired discharge power, can parallel connection polyisomerism electric capacity more.The concrete course of work is: adopt low pressure to discharge and recharge technology, the 380V alternating current is through constant flow module U
0Become the direct current that maximum voltage is 450V, dc output end voltage can carry out free adjustment by module itself.As charge switch K
1When closed, dc source charges to capacitor group C, as charge switch K
1During disconnection, charging finishes.
2. discharge loop is by capacitor group C, controllable silicon discharge switch K
2, current-limiting resistance R
C, series connection such as inductance coil L constitutes.Wherein, capacitor group C is used for storage power, and the inductance value of inductance coil L calculates according to the pulsed magnetic field peak strength of required generation.Observe the voltage at capacitor group C two ends with voltmeter, after charging finished, the thyristor gating circuit by routine triggered controllable silicon discharge switch K
2, K
2Closure, capacitor group C is to inductance coil L discharge, and by pulse current, inductance coil L produces pulsed magnetic field, current-limiting resistance R in inductance coil L
CResistance be 20 Ω.When capacitor group C discharge finishes, K switch
2Close voluntarily.At the inductance coil two ends inductance coil bypass in parallel with inductance coil L is set, the inductance coil bypass is mainly by diode D and resistance R
1Be composed in series, the setting of inductance coil bypass is in order to eliminate the influence of inductance coil induced electromotive force to circuit, to obtain stable pulse.
3. control section mainly by the programmable functions module respectively with charge switch K
1, discharge switch K
2Connect and compose.When discharge switch was the controllable silicon discharge switch, the controllable silicon discharge switch was connected with the programmable functions module by thyristor gating circuit.The programmable functions module is used for setting the cycle of pulse generation system charge and discharge, by charge switch K
1The open and close of constant flow module in the control charging circuit, and the triggering by discharge switch in the thyristor gating circuit control discharge circuit are realized the accurately control automatically of charging and discharging circuit, produce pulsed magnetic field.Wherein, pulsed magnetic field voltage is 10～400V, and the pulsed magnetic field frequency is 1～25Hz, and pulsed magnetic field discharge time is 0.5～2ms.
2, pulsed magnetic field action system
As shown in Figure 2, the pulsed magnetic field action system comprises insulation mould 2, water cooling plant 3, field coil 4 etc., insulation mould 2 places field coil 4 inboards, is provided with water cooling plant 3 between insulation mould 2 and field coil 4, and field coil 4 links to each other with pulsed magnetic field generation systems 5.The effect of this system is that alloy melt 1 is cast in mould 2, and the pulsed magnetic field action that field coil 4 produces solidifies alloy melt 1 in alloy melt 1 under pulsed magnetic field action, realize the purpose of refinement alloy graining tissue.
The utility model adopts charge and discharge mode, have low charging voltage, high-frequency characteristic, safe and reliable, effective acting time is long in metal solidification process, can give full play to the control action of pulsed magnetic field to metal solidification texture, and volume is little, and cost is low, is suitable for laboratory scientific research and Small Scale Industry production.
Below in conjunction with embodiment the utility model is elaborated.
Pure magnesium is melted to 750 ℃ and be incubated 10 minutes in resistance furnace, being poured into then and placing pulsed magnetic field coagulation system preheat temperature is in 400 ℃ the graphite casting die, start the utility model device immediately after cast finishes, pure magnesium melt is solidified under pulsed magnetic field action.During experiment, pulsed magnetic field voltage is 200V, frequency 5Hz, and be 5 minutes action time.
The pure magnesium microscopic structure comparison diagram of preparation when Fig. 3 solidifies for adopting the utility model and routine.Fig. 3 a does not solidify the back alloy microscopic structure for applying pulsed magnetic field, and Fig. 3 b solidifies the back alloy microscopic structure for applying pulsed magnetic field.As seen, use the utility model to make solidified structure crystal grain obtain obvious refinement.
The K417 high temperature alloy is melted to 1400 ℃ and be incubated 10 minutes in the magnetic induction stove, being poured into then and placing pulsed magnetic field coagulation system preheat temperature is in 850 ℃ the graphite crucible, start the utility model device immediately after cast finishes, the high temperature alloy melt is solidified under pulsed magnetic field action.During experiment, pulsed magnetic field voltage is 200V, and frequency is 5Hz, and be 10 minutes action time.
Alloy graining microscopic structure comparison diagram when Fig. 4 adopts the utility model and routine to solidify for the K417 high temperature alloy.Fig. 4 a does not solidify the back alloy microscopic structure for applying pulsed magnetic field, and Fig. 4 b solidifies the back alloy microscopic structure for applying pulsed magnetic field.As seen, the solidified structure of no pulse magnetic field effect is the transcrystalline tissue, and column crystal runs through whole sample; Adopt the utility model to obtain complete equiaxed grain structure, and crystal grain is tiny.
Embodiment result shows, it is 50～300V that the utility model adopts crest voltage, and pulse frequency is that the process of setting that the action of low-voltage pulse magnetic field of 5～10Hz acts on metal just can produce significant refining effect to solidified structure.Thereby the utility model action of low-voltage pulse magnetic field coagulation system helps the research and extension of pulsed magnetic field solidification technology, for driving pulse magnetic field solidification technology development and practical application provide technical foundation.
Claims (6)
1, a kind of action of low-voltage pulse magnetic field coagulation system, it is characterized in that: this device is provided with pulsed magnetic field generation systems, pulsed magnetic field action system, the pulsed magnetic field action system comprises insulation mould, field coil, the insulation mould places the field coil inboard, and the pulsed magnetic field generation systems links to each other with the pulsed magnetic field generation systems by field coil.
2, according to the described action of low-voltage pulse of claim 1 magnetic field coagulation system, it is characterized in that: between insulation mould and field coil, be provided with water cooling plant.
3, according to the described action of low-voltage pulse of claim 1 magnetic field coagulation system, it is characterized in that: the pulsed magnetic field generation systems adopts charge and discharge mode, be divided into three parts, i.e. charge circuit, discharge loop and control section, charge circuit, discharge loop link to each other with control section respectively.
4, according to the described action of low-voltage pulse of claim 3 magnetic field coagulation system, it is characterized in that: charge circuit is the loop of constant flow module, capacitor group, charge switch series connection formation; Discharge loop is the loop of capacitor group, discharge switch, current-limiting resistance, inductance coil series connection formation; Control section is is mainly connected and composed with charge switch, discharge switch respectively by the programmable functions module.
5, according to the described action of low-voltage pulse of claim 4 magnetic field coagulation system, it is characterized in that: discharge switch is the controllable silicon discharge switch, and this switch is connected with the programmable functions module by thyristor gating circuit.
6, according to the described action of low-voltage pulse of claim 4 magnetic field coagulation system, it is characterized in that: the inductance coil bypass is set at the inductance coil two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202317891U CN201308985Y (en) | 2008-12-17 | 2008-12-17 | Low-voltage pulse magnetic field coagulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202317891U CN201308985Y (en) | 2008-12-17 | 2008-12-17 | Low-voltage pulse magnetic field coagulation device |
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| Publication Number | Publication Date |
|---|---|
| CN201308985Y true CN201308985Y (en) | 2009-09-16 |
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|---|---|---|---|
| CNU2008202317891U Expired - Fee Related CN201308985Y (en) | 2008-12-17 | 2008-12-17 | Low-voltage pulse magnetic field coagulation device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920333A (en) * | 2010-05-06 | 2010-12-22 | 上海大学 | Pulse magneto liquid level vibration method for thinning metal solidification texture |
| CN103930224A (en) * | 2011-11-10 | 2014-07-16 | 通用电气公司 | Electromagnetically stirred sand castings |
| CN114570917A (en) * | 2020-11-30 | 2022-06-03 | 机械科学研究总院集团有限公司 | Method for improving fluidity of magnesium alloy |
-
2008
- 2008-12-17 CN CNU2008202317891U patent/CN201308985Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920333A (en) * | 2010-05-06 | 2010-12-22 | 上海大学 | Pulse magneto liquid level vibration method for thinning metal solidification texture |
| CN103930224A (en) * | 2011-11-10 | 2014-07-16 | 通用电气公司 | Electromagnetically stirred sand castings |
| CN114570917A (en) * | 2020-11-30 | 2022-06-03 | 机械科学研究总院集团有限公司 | Method for improving fluidity of magnesium alloy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090916 Termination date: 20151217 |
|
| EXPY | Termination of patent right or utility model |