CN203715691U - Current pulse control system for eliminating residual stress - Google Patents
Current pulse control system for eliminating residual stress Download PDFInfo
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- CN203715691U CN203715691U CN201320830777.1U CN201320830777U CN203715691U CN 203715691 U CN203715691 U CN 203715691U CN 201320830777 U CN201320830777 U CN 201320830777U CN 203715691 U CN203715691 U CN 203715691U
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Abstract
The utility model provides a current pulse control system for eliminating residual stress. The current pulse control system comprises a controller, a charge module, a discharge module and a discharge electrode, wherein the charge module comprises a plurality of charge units which are connected in parallel, each charge unit respectively comprises a contactor and a charge capacitance module, and the contactor is connected to the charge capacitance module in series in each charge unit; the discharge module comprises a plurality of discharge switches and inductors, each charge unit is connected to one discharge switch, and the inductors are connected to the discharge electrode in series; one end of the discharge electrode is connected to the inductors, the other end of the discharge electrode is connected to the parallel connection ends of the charge capacitance modules; the controller is used for controlling the sequential power-on of the contactors, and when the contactors are powered on, the discharge switches are closed, and the charge units are at charge state; and the controller is used for controlling the sequential power-on of the discharge switches, and when the discharge switches are powered on, the contactors are closed, and the discharge module gives out current pulse. The current pulse control system has the advantages of relatively high generation frequency of current pulse and wide adjustment range.
Description
Technical field
The utility model relates to a kind of for eliminating the impulse of current Controlling System of unrelieved stress.
Technical background
Mechanical component are in the process of processing and manufacturing, inevitably can produce unrelieved stress, have a strong impact on the mechanical property of workpiece, intensity, erosion resistance, dimensional precision and the work-ing life etc. of such as material, irrational stressed condition, tends to reduce the performance of material.
No. 200710012265.3, Chinese patent application, disclose a kind of method of eliminating unrelieved stress in steel, the device that produces pulsed current in the method is made up of surge generator and oscilloscope, impulse current generator comprises gallon coil, electrical condenser group, discharge switch and pilot circuit, triggering circuit and charging circuit etc., pilot circuit is for controlling the keying of charging circuit and triggering circuit.When work, pilot circuit sends instruction to charging circuit, for after electrical condenser group charged, pilot circuit sends instruction again and makes discharge switch closure to triggering circuit, produce pulsed current by capacitor set discharge, sample is processed, the external oscilloscope of gallon coil, the waveform of pulsed current and basic parameter are measured by TDS3012 type oscilloscope.The shortcoming of this impulse current generator is: 1) must after charging completes, could produce pulsed current, two pulsed current are long interval time, and the frequency that pulse produces is low and non-adjustable.2) can only produce this kind of pulse current waveform of oscillatory extinction waveform, be difficult to adapt to workpiece and the material of different cross-sectional.3) action time of uncontrollable individual pulse.
Utility model content
In order to overcome the low and nonadjustable shortcoming of frequency that pulse that existing surge generator exists produces, the utility model provides a kind of impulse of current to produce that frequency is higher and regulation range is larger for eliminating the impulse of current Controlling System of unrelieved stress.
For eliminating the impulse of current Controlling System of unrelieved stress, comprise controller, have the charging module of power supply input, for discharge module and discharge electrode to the pulse of workpiece release current, it is characterized in that: charging module comprises the charging unit of multiple parallel connections, each charging unit comprises respectively contactor and charging capacitor module separately, and in each charging unit, contactor is connected with charging capacitor module;
Discharge module comprises multiple discharge switches and inductance, each charging unit connects a discharge switch, each discharge switch comprises the first connection terminal and the second connection terminal separately, the first connection terminal connects with the contactor of corresponding charging unit, the second connection terminal of all discharge switches is all connected with inductance, and inductance is connected with discharge electrode;
Discharge electrode one end is connected with inductance, and the other end is connected in the parallel connected end of charging capacitor module;
Each contactor sequential turn-on of controller control, when contactor conducting, discharge switch is closed, and charging unit enters charging state; Each discharge switch sequential turn-on of controller control, when discharge switch conducting, contactor disconnects, and discharge module sends impulse of current.
Further, discharge switch is great power bidirectional silicon-controlled switch (SCS), allows electric current to two-way circulate.
Further, described impulse of current Controlling System has Waveform Control unit, Waveform Control unit is in parallel with the series circuit that inductance and discharge electrode form, Waveform Control unit comprises the first resistance being connected in series, filtered diode and Waveform Control switch, when Waveform Control switch is closed, discharge module output direct current decaying pulse; When Waveform Control switch disconnects, the pulse of discharge module output oscillating AC.
Further, described impulse of current Controlling System has auxiliary capacitor, and auxiliary capacitor is in parallel with charging module.
Further, each charging capacitor module is parallel with off-load unit separately, and each off-load unit comprises electric power generation unloading resistance and off-load switch, electric power generation unloading resistance and the series connection of off-load switch.
Further, the quantity of off-load switch is multiple, and the quantity of electric power generation unloading resistance is one, and electric power generation unloading resistance one end is connected with off-load switch, and the other end is connected with the parallel connected end of charging capacitor module, and each off-load switch connects a charging capacitor module.
Further, described impulse of current Controlling System has power supply adjusting module, and power supply adjusting module comprises pressure regulation boost-up circuit and current rectifying and wave filtering circuit, and the output of current rectifying and wave filtering circuit is as the input power of charging module; Between pressure regulation boost-up circuit and current rectifying and wave filtering circuit, be coupled by transformer winding; Trip switch between current rectifying and wave filtering circuit and charging module, trip switch is connected with current rectifying and wave filtering circuit.
Further, charging capacitor module comprises at least two capacitive branch, and at least one capacitive branch has system selector switch, the on off state of switching selection switch, the capacitance of change charging capacitor module.
Technical conceive of the present utility model is: according to the analysis of current expression in typical RLC discharging circuit, utilize pressure regulation boost-up circuit to regulate charging voltage, control the amplitude of current density.Control the time of single current pulse action by regulating the capacitance size of charging capacitor module.Discharge time and the discharge order of duration of charging by controller control multichannel charging unit, charging order, discharge module, controlled by the impulse of current cycle of workpiece, and the number of impulse of current; By the shape of the waveform control circuit control impulse of current in parallel with workpiece.
Analyze the RLC loop of capacitor discharge, according to Kirchhoff's law and circuit elements device property, second order ordinary differential equation is described:
，
In formula,
lthe inductance in loop,
ctank capacitance,
rthe resistance in loop,
tthe time,
iit is current value.Starting condition is:
。
Discharge loop meets
, be underdamping situation, produce concussion decay discharge process, the solution of equation is
, in formula,
,
.
According to current expression
,
for the amplitude item of electric current, by regulating the charging voltage of high-voltage capacitance
, realize the control to current amplitude.
represent the rate of decay of current amplitude, in order to produce larger current density in discharge loop, make more energy enter the inside of science and engineering part of living in, with increasing action effect, do not pass through to change resistance
ror
lcontrol the action time of individual pulse.Therefore, by regulating fading period
control the action time of individual pulse, according to described
, control capacittance C controls the action time of individual pulse electric current.
Adopt the action sequence of the charging of controller control multichannel charging capacitor module, discharge switch, thus setting pulse cycle and number.In the time that waveform control circuit disconnects, discharge module produces and exchanges oscillating current pulse, and in the time that waveform control circuit is connected, discharge module produces the pulse of direct current decaying current.
The beneficial effects of the utility model are:
1, can in a big way, regulate the amplitude of the impulse of current of eliminating unrelieved stress, the action time of individual pulse, the cycle of pulse generation, the number that pulse produces.
2, the waveform of controlling easily the impulse of current of processing workpiece, can produce oscillating impulse and direct current decaying pulse.
3, this Controlling System is simple to operate, and major part is operating as automatization or semi-automation, easy to use, is conducive to the popularization of impulse of current elimination unrelieved stress technique.
Brief description of the drawings
Fig. 1 is schematic circuit diagram of the present utility model.
Fig. 2 is pulsed current periodic Control sequential chart.
Fig. 3 is the different pulse shape figure that the utility model produces.
Fig. 4 is the charging capacitor module that multiple Capacitance parallel connections form.
Fig. 5 is the charging capacitor module that multiple capacitances in series form.
Fig. 6 is the charging capacitor module that capacitances in series parallel connection is mixed to form.
Embodiment
With reference to accompanying drawing, further illustrate the utility model:
As shown in Figure 1, for eliminating the impulse of current Controlling System of unrelieved stress, comprise controller, there is the charging module of power supply input, for discharge module and discharge electrode to the pulse of workpiece release current, charging module comprises the charging unit of multiple parallel connections, and each charging unit comprises respectively contactor KM1 ~ KM6 and charging capacitor module CHM1 ~ CHM6 separately, and in each charging unit, contactor is connected with charging capacitor module;
Discharge module comprises multiple discharge switch BCR1 ~ BCR6 and inductance L, each charging unit connects a discharge switch, each discharge switch comprises the first connection terminal and the second connection terminal separately, the first connection terminal connects with the contactor of corresponding charging unit, the second connection terminal of all discharge switches is all connected with inductance L, and inductance L is connected with discharge electrode;
Discharge electrode one end is connected with inductance L, and the other end is connected in the parallel connected end of charging capacitor module;
Each contactor of controller control KM1 ~ KM6 sequential turn-on, when contactor conducting, discharge switch is closed, and charging unit enters charging state; Each discharge switch of controller control BCR1 ~ BCR6 sequential turn-on, when discharge switch conducting, contactor disconnects, and discharge module sends electricimpulse.The utility model utilizes controller to control by the number of the contactor of control conducting the impulse of current number that needs generation, can produce continuously some impulse of current and process workpiece, meets different treatment process.Contactor is conducting in order, and the timed interval of contactor conducting is identical, as shown in Figure 2.
Discharge switch is great power bidirectional silicon-controlled switch (SCS), and the on off state conversion of great power bidirectional silicon-controlled switch (SCS) rapidly, can improve the occurrence frequency of pulse.
In order to make the utility model can export easily two kinds of multi-form impulse of current, described impulse of current set-up of control system Waveform Control unit.Waveform Control unit is in parallel with the series circuit of the formation of inductance L and discharge electrode, and Waveform Control unit comprises the first resistance R 1 being connected in series, filtered diode D1 and Waveform Control switch, the closed discharge module output of Waveform Control switch direct current decaying pulse; Waveform Control switch disconnects, the pulse of discharge module output oscillating AC.Different impulse of current forms is applicable to differing materials and difform workpiece, as shown in Figure 3.
In order to dwindle the duration of charging of high-voltage capacitance, make impulse of current produce cycle one in a big way in adjusting, described impulse of current Controlling System is set up auxiliary capacitor C1, auxiliary capacitor C1 is in parallel with charging module.
For the energy that ensures all charging capacitor modules discharges completely, each charging capacitor module parallel connection off-load unit separately.Each off-load unit comprises electric power generation unloading resistance R2 and off-load switch, electric power generation unloading resistance R2 and the series connection of off-load switch.
The quantity of off-load switch is multiple, and the quantity of electric power generation unloading resistance R2 is one, and electric power generation unloading resistance R2 one end is connected with off-load switch, and the other end is connected with the parallel connected end of charging capacitor module CHM1 ~ CHM6, and each off-load switch connects a charging capacitor module.
Described impulse of current Controlling System has power supply adjusting module, and power supply adjusting module comprises pressure regulation boost-up circuit and current rectifying and wave filtering circuit, and the output of current rectifying and wave filtering circuit is as the power supply input of charging module; Between pressure regulation boost-up circuit and current rectifying and wave filtering circuit, be coupled by transformer winding; Trip switch between current rectifying and wave filtering circuit and charging module, trip switch is connected with current rectifying and wave filtering circuit.Pressure regulation boost-up circuit comprises controllable silicon regulator SCR1 ~ SCR4 and step-up transformer T.The full-bridge type current rectifying and wave filtering circuit that current rectifying and wave filtering circuit is made up of thyristor SCR1 ~ SCR4.
In order to make the capacitance of charging capacitor module adjustable, regulate the individual pulse object of action time thereby reach, limit: charging capacitor module comprises at least two capacitive branch, at least one capacitive branch has system selector switch K, and the capacitance of the on off state charging capacitor module of switching selection switch K changes.
The form of charging capacitor module can be as shown in Figure 4, and charging capacitor module forms by multiple capacitive branch are in parallel, and each parallel branch is formed by capacitor C and system selector switch K series connection.
The form of charging capacitor module can also be as shown in Figure 5, and charging capacitor module is formed by N capacitor C series connection, N > 1, and N-1 capacitor C is in parallel with system selector switch K respectively.Certainly, the electric capacity quantity in parallel with system selector switch K also can be less than N-1, is only greater than 1, is not limited to giving an example of the present embodiment.
The form of charging capacitor module can also be as shown in Figure 6, and charging capacitor comprises at least two parallel branches, and at least one parallel branch is formed by N capacitor C series connection, N > 1, and N-1 capacitor C is in parallel with the first system selector switch KI respectively; At least one parallel branch is formed by capacitor C and the second system selector switch KII series connection.The number of electric capacity can be selected according to practical situation, is not limited to giving an example of the present embodiment.
Working process of the present utility model is as follows: the input terminus of pressure regulation boost-up circuit connects 220V AC power.Pressure regulation boost-up circuit comprises thyristor regulating depressor and step-up transformer T.Voltage through controllable silicon regulator output is 0 ~ 220V, and controllable silicon regulator is regulating voltage continuously.Then pass through described step-up transformer T, make the regulation range of magnitude of voltage become 0 ~ 2120V.
The electric current of transformer T output enter described by current rectifying and wave filtering circuit form direct current.
The charging capacitor module CHM1 ~ CHM6 of the charging unit of the direct current after overcommutation to contactor KM1 ~ KM6 closure charges.The duration of charging of multichannel charging unit and charging order are by controller control, and controller is dsp controller.
After charging capacitor module CHM1 ~ CHM6 has charged, under the control of discharge switch BCR1 ~ BCR6, to workpiece M discharge process, the closed cycle of the discharge switch BCR1 ~ BCR6 of discharge module and discharge order, by controller control, realize automatization control simultaneously.If had
nroad charge and discharge circuit, each road duration of charging is
t1, be discharge time
t2, the regulation range of current pulse frequency producing is 0 ~
.
Regulate the capacitance of charging capacitor module, can control the fading period of individual pulse
thereby, the action time of control individual pulse.
In the time that discharge switch BCR1 ~ BCR6 connects, charging capacitor module CHM1 ~ CHM6 electric discharge, the impulse of current that produces high energy in discharge module, processes workpiece M, reduces inner unrelieved stress.
In the time that the waveform control circuit being made up of the first resistance R 1, filtered diode D1 and Waveform Control switch accesses impulse of current Controlling System, i.e. Waveform Control switch connection, is direct current decaying pulse by the impulse of current of workpiece M.In the time that Waveform Control switch disconnects, be oscillating AC pulse by the impulse of current of workpiece M.
Controller control contactor KM1 ~ KM6 conducting, the charging capacitor module CHM1 ~ CHM6 of the charging unit of contactor KM1 ~ KM6 conducting enters charging state.After having charged, contactor KM1 ~ KM6 closes, the discharge switch BCR1 ~ BCR6 closure corresponding with this charging unit, discharge electrode M electric discharge to workpiece to be handled.Controller control contactor KM1 ~ KM6 sequential turn-on, the interval time of contactor KM1 ~ KM6 conducting is identical.The conducting number and the conduction interval time that change contactor KM1 ~ KM6 can be adjusted the frequency that impulse of current produces.
After workpiece M finishes dealing with, connect off-load switch, by electric power generation unloading resistance R2, remaining charging capacitor module CHM1 ~ CHM6 energy is discharged, guarantee operational safety.
The beneficial effects of the utility model are:
1, can in a big way, regulate the amplitude of the impulse of current of eliminating unrelieved stress, the action time of individual pulse, the cycle of pulse generation, the number that pulse produces.
2, the waveform of controlling easily the impulse of current of processing workpiece M, can produce oscillating impulse and direct current decaying pulse.
3, this Controlling System is simple to operate, and major part is operating as automatization or semi-automation, easy to use, is conducive to the popularization of impulse of current elimination unrelieved stress technique.
Content described in this specification sheets embodiment is only enumerating of way of realization to utility model design; protection domain of the present utility model should not be regarded as only limiting to the specific form that embodiment states, protection domain of the present utility model also and conceive the equivalent technologies means that can expect according to the utility model in those skilled in the art.
Claims (8)
1. for eliminating the impulse of current Controlling System of unrelieved stress, comprise controller, have the charging module of power supply input, for discharge module and discharge electrode to the pulse of workpiece release current, it is characterized in that: charging module comprises the charging unit of multiple parallel connections, each charging unit comprises respectively contactor and charging capacitor module separately, and in each charging unit, contactor is connected with charging capacitor module;
Discharge module comprises multiple discharge switches and inductance, each charging unit connects a discharge switch, each discharge switch comprises the first connection terminal and the second connection terminal separately, the first connection terminal connects with the contactor of corresponding charging unit, the second connection terminal of all discharge switches is all connected with inductance, and inductance is connected with discharge electrode;
Discharge electrode one end is connected with inductance, and the other end is connected in the parallel connected end of charging capacitor module;
Each contactor sequential turn-on of controller control, when contactor conducting, discharge switch is closed, and charging unit enters charging state; Each discharge switch sequential turn-on of controller control, when discharge switch conducting, contactor disconnects, and discharge module sends impulse of current.
2. as claimed in claim 1 for eliminating the impulse of current Controlling System of unrelieved stress, it is characterized in that: discharge switch is great power bidirectional silicon-controlled switch (SCS).
3. as claimed in claim 1 or 2 for eliminating the impulse of current Controlling System of unrelieved stress, it is characterized in that: described impulse of current Controlling System has Waveform Control unit, Waveform Control unit is in parallel with the series circuit that inductance and discharge electrode form, Waveform Control unit comprises the first resistance being connected in series, filtered diode and Waveform Control switch, when Waveform Control switch is closed, discharge module output direct current decaying pulse; When Waveform Control switch disconnects, the pulse of discharge module output oscillating AC.
4. as claimed in claim 3 for eliminating the impulse of current Controlling System of unrelieved stress, it is characterized in that: described impulse of current Controlling System has auxiliary capacitor, and auxiliary capacitor is in parallel with charging module.
5. as claimed in claim 4 for eliminating the impulse of current Controlling System of unrelieved stress, it is characterized in that: each charging capacitor module is parallel with off-load unit separately, each off-load unit comprises electric power generation unloading resistance and off-load switch, electric power generation unloading resistance and the series connection of off-load switch.
6. as claimed in claim 5 for eliminating the impulse of current Controlling System of unrelieved stress, it is characterized in that: the quantity of off-load switch is multiple, the quantity of electric power generation unloading resistance is one, electric power generation unloading resistance one end is connected with off-load switch, the other end is connected with the parallel connected end of charging capacitor module, and each off-load switch connects a charging capacitor module.
7. as claimed in claim 6 for eliminating the impulse of current Controlling System of unrelieved stress, it is characterized in that: described impulse of current Controlling System has power supply adjusting module, power supply adjusting module comprises pressure regulation boost-up circuit and current rectifying and wave filtering circuit, and the output of current rectifying and wave filtering circuit is as the input power of charging module; Between pressure regulation boost-up circuit and current rectifying and wave filtering circuit, be coupled by transformer winding; Trip switch between current rectifying and wave filtering circuit and charging module, trip switch is connected with current rectifying and wave filtering circuit.
8. as claimed in claim 7 for eliminating the impulse of current Controlling System of unrelieved stress, it is characterized in that: charging capacitor module comprises at least two capacitive branch, at least one capacitive branch has system selector switch, the on off state of switching selection switch, the capacitance of change charging capacitor module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320830777.1U CN203715691U (en) | 2013-12-16 | 2013-12-16 | Current pulse control system for eliminating residual stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320830777.1U CN203715691U (en) | 2013-12-16 | 2013-12-16 | Current pulse control system for eliminating residual stress |
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| Publication Number | Publication Date |
|---|---|
| CN203715691U true CN203715691U (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320830777.1U Withdrawn - After Issue CN203715691U (en) | 2013-12-16 | 2013-12-16 | Current pulse control system for eliminating residual stress |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627886A (en) * | 2013-12-16 | 2014-03-12 | 浙江大学 | Current pulse control system for relieving residual stress |
-
2013
- 2013-12-16 CN CN201320830777.1U patent/CN203715691U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627886A (en) * | 2013-12-16 | 2014-03-12 | 浙江大学 | Current pulse control system for relieving residual stress |
| CN103627886B (en) * | 2013-12-16 | 2015-12-16 | 浙江大学 | For eliminating the impulse of current Controlling System of unrelieved stress |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140716 Effective date of abandoning: 20151216 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |