CN204449297U - A kind of powder metallurgy discharge plasma sintering system - Google Patents
A kind of powder metallurgy discharge plasma sintering system Download PDFInfo
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- CN204449297U CN204449297U CN201520003345.2U CN201520003345U CN204449297U CN 204449297 U CN204449297 U CN 204449297U CN 201520003345 U CN201520003345 U CN 201520003345U CN 204449297 U CN204449297 U CN 204449297U
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Abstract
The utility model relates to powder metallurgy device technique field, especially a kind of powder metallurgy discharge plasma sintering system.It comprises the centralized control device, SPS control device, SPS pressue device, impulse current generator, upper stamping die and the lower stamping die that connect successively, and SPS control device applies pulse current by impulse current generator respectively to upper stamping die and lower stamping die; Impulse current generator comprises main circuit unit for exporting pulse current, for the control circuit unit of the amplitude of regulating impulse electric current and the optical coupling isolation circuit unit for carrying out strong and weak electricity isolation.The utility model utilizes control circuit unit to realize the adjustment of the pulse current of main circuit unit, direction is identical, peak value is fixing to make it keep, and then make stamping die and lower stamping die carry out Current Heating to powder grain unidirectionally to exert pressure with vertical, be conducive to accelerating sintering densification process, obtain high-quality sintered body; Its system architecture is simple, modulability strong, has very strong practicality.
Description
Technical field
The utility model relates to powder metallurgy device technique field, especially a kind of powder metallurgy discharge plasma sintering system.
Background technology
Discharge plasma sintering (SPS) is a kind of novel Fast Sintering technology that development in recent years is got up, due to plasma activated sintering technology melt plasma activation, thermalization, resistance heated be integrated, thus there is the features such as the fine structure that intensification is quick, sintering time is short, crystal grain is even, be conducive to controlling sintered body, it utilizes the thermogenetic TRANSIENT HIGH TEMPERATURE field of pulse energy, discharge pulse pressure and joule to realize sintering process, prepares significant for realizing material that is high-quality and efficient, low power consuming low cost.
But, existing discharge plasma sintering system due to system architecture arrange very unreasonable, especially the design defect of the circuit structure of pulse generating unit, the problem such as cause the sintering temperature of system, pulse current adjustability poor, has had a strong impact on promoting the use of of discharge plasma sintering device.
Utility model content
For the deficiency that above-mentioned prior art exists, the purpose of this utility model is to provide that a kind of system architecture is simple, adjustability strong, control powder metallurgy discharge plasma sintering system easily.
To achieve these goals, the utility model adopts following technical scheme:
A kind of powder metallurgy discharge plasma sintering system, it comprises the centralized control device, SPS control device, SPS pressue device, impulse current generator, upper stamping die and the lower stamping die that connect successively, described SPS control device and centralized control device are electrically connected and are controlled by centralized control device, described SPS control device control SPS pressue device drives stamping die and lower stamping die to do relative motion or opposing motion simultaneously, and described SPS control device also applies pulse current by impulse current generator respectively to upper stamping die and lower stamping die;
Described impulse current generator comprises main circuit unit for exporting pulse current, for the control circuit unit of the amplitude of regulating impulse electric current and the optical coupling isolation circuit unit for carrying out strong and weak electricity isolation, described main circuit unit is electrically connected with SPS control device, upper stamping die and lower stamping die simultaneously, and described control circuit unit is connected with main circuit unit by optical coupling isolation circuit unit.
Preferably, described main circuit unit comprises rectifier bridge, storage capacitor and switching tube, input and the SPS control device of described rectifier bridge are electrically connected, output is connected to the two ends of storage capacitor by photo resistance, the two ends of described storage capacitor are parallel with safety electric capacity and discharge resistance, one end of described storage capacitor is connected with the emitter stage of switching tube, the other end is connected to one end of stamping die or one end of lower stamping die, the other end or the other end of lower stamping die of described upper stamping die are connected with the colelctor electrode of switching tube, the base stage of described switching tube is connected with the output of optical coupling isolation circuit unit.
Preferably, described optical coupling isolation circuit unit comprises A3120 type optocoupler, the base stage that No. 3 pins of described optocoupler are connected with the output of control circuit unit by the first resistance, No. 6 pins and No. 7 pins are all connected to the pipe that opens the light by the first resistor group.
Preferably, the first switch is connected with between No. 2 pins of described optocoupler and No. 3 pins.
Preferably, described control circuit unit comprises 7555 type timers, the 4th resistance and potentiometer is connected with in turn between No. 7 pins of described timer and No. 6 pins, No. 7 pins of described timer are connected No. 8 pins by the 3rd resistance of connecting successively with the second resistance, No. 3 pins of described timer are connected with the first resistance, are connected with the 3rd electric capacity between No. 2 pins and No. 1 pin, and the two ends of described 3rd electric capacity are parallel with the 4th electric capacity.
Preferably, described 4th electric capacity is parallel to the two ends of the 3rd electric capacity by second switch.
Preferably, described upper stamping die comprises top electrode and seaming chuck, and described seaming chuck is connected with impulse current generator and SPS pressue device by top electrode; Described lower stamping die comprises bottom electrode and push-down head, and described push-down head is connected with impulse current generator and SPS pressue device by bottom electrode.
Owing to have employed such scheme, the utility model utilizes control circuit unit to realize the adjustment of the pulse current of main circuit unit, direction is identical, peak value is fixing to make it keep, and then make stamping die and lower stamping die carry out Current Heating to powder grain unidirectionally to exert pressure with vertical, be conducive to accelerating sintering densification process, obtain high-quality sintered body; Its system architecture is simple, modulability strong, has very strong practicality.
Accompanying drawing explanation
Fig. 1 is the system principle schematic diagram of the utility model embodiment;
Fig. 2 is the electrical block diagram of the impulse current generator of the utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
As depicted in figs. 1 and 2, the powder metallurgy discharge plasma sintering system of the present embodiment, it comprises the centralized control device 1, SPS control device 2, SPS pressue device 3, impulse current generator, upper stamping die and the lower stamping die that connect successively; Wherein, the assembly such as centralized control device 1 accessible site displacement measurement, control climate, water-cooled, temperature survey, SPS control device 2 and centralized control device 1 are electrically connected and are controlled by centralized control device 1, SPS control device 2 control SPS pressue device 3 drives stamping die and lower stamping die to do relative motion or opposing motion simultaneously, and SPS control device 2 also applies pulse current by impulse current generator respectively to upper stamping die and lower stamping die; Impulse current generator then comprise for upwards stamping die and lower stamping die export pulse current main circuit unit 4, for the control circuit unit 5 of the amplitude of regulating impulse electric current and the optical coupling isolation circuit unit 6 for carrying out strong and weak electricity isolation, main circuit unit 4 is electrically connected with SPS control device 2, upper stamping die and lower stamping die simultaneously, and control circuit unit 5 is connected with main circuit unit 4 by optical coupling isolation circuit unit 6.So, utilize control circuit unit 5 to realize the adjustment of the pulse current of main circuit unit 4, direction is identical, peak value is fixing to make it keep, and then make stamping die and lower stamping die carry out Current Heating to powder grain unidirectionally to exert pressure with vertical, be conducive to accelerating sintering densification process, obtain high-quality sintered body.
Further, the main circuit unit 4 of the present embodiment comprises rectifier bridge, storage capacitor C1 and switch transistor T 1, input and the SPS control device 2 of rectifier bridge are electrically connected, output is connected to the two ends of storage capacitor C1 by photo resistance ZE, the two ends of storage capacitor C1 are parallel with safety electric capacity C2(and Y capacitance) and discharge resistance R1, one end of storage capacitor C1 is connected with the emitter stage of switch transistor T 1, the other end is connected to one end of stamping die or one end of lower stamping die, the other end of upper stamping die or the other end of lower stamping die are connected with the colelctor electrode of switch transistor T 1, the base stage of switch transistor T 1 is connected with the output of optical coupling isolation circuit unit 6.So, thermistor ZE can suppress the surge current that powers on, and safety electric capacity C2 can prevent the high-frequency signal produced in switch transistor T 1 turn-on and turn-off process from sealing in SPS control device 2; And the size of the amplitude of controlled discharge electric current is carried out by the ON time of gauge tap pipe T1.
For ensureing the security of impulse current generator, the optical coupling isolation circuit unit 6 of the present embodiment comprises A3120 type optocoupler, the base stage that No. 3 pins of optocoupler are connected with the output of control circuit unit 5 by the first resistance R1, No. 6 pins and No. 7 pins are all connected to the pipe T1 that opens the light by the first resistor group (being made up of resistance R7 and R8, R9 and R10).For strengthening the adjustability of whole impulse current generator, between No. 2 pins of the optocoupler of the present embodiment and No. 3 pins, be connected with the first switch S 1.
For the adjustability of impulse current generator output current amplitude can be realized, the control circuit unit 5 of the present embodiment comprises 7555 type timers, the 4th resistance R4 and potentiometer R5 is connected with in turn between No. 7 pins of timer and No. 6 pins, No. 7 pins of timer are connected No. 8 pins by the 3rd resistance R3 connected successively with the second resistance R2, No. 3 pins of timer are connected with the first resistance R1, are connected with the 3rd electric capacity C3 between No. 2 pins and No. 1 pin, and the two ends of the 3rd electric capacity C3 are parallel with the 4th electric capacity C4.So, the size by regulator potentiometer R5 resistance regulates the discharge and recharge time of the 3rd electric capacity C3, thus regulates the pulse period that timer No. 3 pins export; Utilize the 4th resistance C4 then can change the changeability of the accommodating size of the charge and discharge capacitance of control circuit unit.Further, the 4th electric capacity C4 of the present embodiment is parallel to the two ends of the 3rd electric capacity C3 by second switch S2, so, the adjustment of the accommodating size of charge and discharge capacitance is changed by switch, make the 3rd electric capacity C3, the discharge and recharge time of the 4th electric capacity C4 becomes original two times, thus the cycle making timer No. 3 pins export pulses becomes original two times.
Meanwhile, the upper stamping die of the present embodiment comprises top electrode 7 and seaming chuck 8, and seaming chuck 8 is connected with impulse current generator and SPS pressue device 3 by top electrode 7; Lower stamping die comprises bottom electrode 9 and push-down head 10, and push-down head 10 is connected with impulse current generator and SPS pressue device 3 by bottom electrode 9.So, impulse current generator can utilize top electrode 7 and bottom electrode 9 to carry out Current Heating to pressure head.
The foregoing is only preferred embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model, every utilize the utility model description and accompanying drawing content to do equivalent structure or equivalent flow process
Conversion, or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (7)
1. a powder metallurgy discharge plasma sintering system, it is characterized in that: it comprises the centralized control device, SPS control device, SPS pressue device, impulse current generator, upper stamping die and the lower stamping die that connect successively, described SPS control device and centralized control device are electrically connected and are controlled by centralized control device, described SPS control device control SPS pressue device drives stamping die and lower stamping die to do relative motion or opposing motion simultaneously, and described SPS control device also applies pulse current by impulse current generator respectively to upper stamping die and lower stamping die;
Described impulse current generator comprises main circuit unit for exporting pulse current, for the control circuit unit of the amplitude of regulating impulse electric current and the optical coupling isolation circuit unit for carrying out strong and weak electricity isolation, described main circuit unit is electrically connected with SPS control device, upper stamping die and lower stamping die simultaneously, and described control circuit unit is connected with main circuit unit by optical coupling isolation circuit unit.
2. a kind of powder metallurgy discharge plasma sintering system as claimed in claim 1, it is characterized in that: described main circuit unit comprises rectifier bridge, storage capacitor and switching tube, input and the SPS control device of described rectifier bridge are electrically connected, output is connected to the two ends of storage capacitor by photo resistance, the two ends of described storage capacitor are parallel with safety electric capacity and discharge resistance, one end of described storage capacitor is connected with the emitter stage of switching tube, the other end is connected to one end of stamping die or one end of lower stamping die, the other end or the other end of lower stamping die of described upper stamping die are connected with the colelctor electrode of switching tube, the base stage of described switching tube is connected with the output of optical coupling isolation circuit unit.
3. a kind of powder metallurgy discharge plasma sintering system as claimed in claim 2, it is characterized in that: described optical coupling isolation circuit unit comprises A3120 type optocoupler, No. 3 pins of described optocoupler be connected with the output of control circuit unit by the first resistance, No. 6 pins and No. 7 pins are all connected to the pipe that opens the light base stage by the first resistor group.
4. a kind of powder metallurgy discharge plasma sintering system as claimed in claim 3, is characterized in that: be connected with the first switch between No. 2 pins of described optocoupler and No. 3 pins.
5. a kind of powder metallurgy discharge plasma sintering system as claimed in claim 3, it is characterized in that: described control circuit unit comprises 7555 type timers, the 4th resistance and potentiometer is connected with in turn between No. 7 pins of described timer and No. 6 pins, No. 7 pins of described timer are connected No. 8 pins by the 3rd resistance of connecting successively with the second resistance, No. 3 pins of described timer are connected with the first resistance, are connected with the 3rd electric capacity between No. 2 pins and No. 1 pin, and the two ends of described 3rd electric capacity are parallel with the 4th electric capacity.
6. a kind of powder metallurgy discharge plasma sintering system as claimed in claim 5, is characterized in that: described 4th electric capacity is parallel to the two ends of the 3rd electric capacity by second switch.
7. a kind of powder metallurgy discharge plasma sintering system according to any one of claim 1-6, is characterized in that: described upper stamping die comprises top electrode and seaming chuck, and described seaming chuck is connected with impulse current generator and SPS pressue device by top electrode; Described lower stamping die comprises bottom electrode and push-down head, and described push-down head is connected with impulse current generator and SPS pressue device by bottom electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520003345.2U CN204449297U (en) | 2015-01-05 | 2015-01-05 | A kind of powder metallurgy discharge plasma sintering system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520003345.2U CN204449297U (en) | 2015-01-05 | 2015-01-05 | A kind of powder metallurgy discharge plasma sintering system |
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| CN204449297U true CN204449297U (en) | 2015-07-08 |
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| CN201520003345.2U Expired - Fee Related CN204449297U (en) | 2015-01-05 | 2015-01-05 | A kind of powder metallurgy discharge plasma sintering system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135873A (en) * | 2015-08-05 | 2015-12-09 | 清华大学 | Dynamic pressure electric pulse double-field control sintering furnace and sintering method |
| CN105478777A (en) * | 2015-12-14 | 2016-04-13 | 中国航空工业集团公司北京航空制造工程研究所 | Metal/ceramic gradient material and preparation method thereof |
| CN109589503A (en) * | 2015-09-11 | 2019-04-09 | 南京中硼联康医疗科技有限公司 | Discharging plasma sintering equipment and sintering process |
-
2015
- 2015-01-05 CN CN201520003345.2U patent/CN204449297U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135873A (en) * | 2015-08-05 | 2015-12-09 | 清华大学 | Dynamic pressure electric pulse double-field control sintering furnace and sintering method |
| CN109589503A (en) * | 2015-09-11 | 2019-04-09 | 南京中硼联康医疗科技有限公司 | Discharging plasma sintering equipment and sintering process |
| CN105478777A (en) * | 2015-12-14 | 2016-04-13 | 中国航空工业集团公司北京航空制造工程研究所 | Metal/ceramic gradient material and preparation method thereof |
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| 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: 20150708 Termination date: 20180105 |
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| CF01 | Termination of patent right due to non-payment of annual fee |