CN202763233U - Electric spark processing machine - Google Patents
Electric spark processing machine Download PDFInfo
- Publication number
- CN202763233U CN202763233U CN 201220054033 CN201220054033U CN202763233U CN 202763233 U CN202763233 U CN 202763233U CN 201220054033 CN201220054033 CN 201220054033 CN 201220054033 U CN201220054033 U CN 201220054033U CN 202763233 U CN202763233 U CN 202763233U
- Authority
- CN
- China
- Prior art keywords
- current
- power supply
- circuit
- frequency
- constant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000010892 electric spark Methods 0.000 title abstract 3
- 238000003754 machining Methods 0.000 claims description 17
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000002923 metal particle Substances 0.000 description 2
- 230000009993 protective function Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The utility model discloses an electric spark processing machine which comprises a machinery system, a servo system and a power supply circuit, wherein the machinery system is driven by the servo system to process a work piece, a power supply input end of the servo system is connected with the power supply circuit, and the power supply circuit is a high voltage constant current power source and a low voltage constant current source. A low voltage part of an orginal direct current power source is replaced with a low voltage (50 V) large power constant current power supply, a high voltage part of the original direct current power source is replaced with a high voltage (300 V, 5 A) constant current power supply, and an over-current protection function is added in the high frequency signal circuit 8. When an over-current is generated in processing procedures, the gap voltage between an electrode and the work piece is less than 20 V, and the high frequency switch tube can be automatically cut off. Because the constant current source is employed, energy consumption of the electric spark processing machine is reduced, and use cost is saved.
Description
Technical field
The utility model relates to spark erosion technique, is specifically related to a kind of its variable frequency power source and partly is the electric discharge machining apparatus of constant-current supply.
Background technology
Electric discharge machining apparatus three large parts form: mechanical system, servo-drive system, high frequency electric source are a kind of special process equipment that comes processing metal by spark discharge; Therefore, spark machined is one of topmost manufacturing process of mould industry.
Fig. 1 is existing electric discharge machining apparatus principle schematic, in the drawings, Z axis 3 is with moving electrode 1 to do upper and lower motion under the driving of servomotor, Z axis 3 moves upward or moves downward the gap voltage that produces when depending on electrode 1 with workpiece 4 discharge, when electrode 1 and workpiece 4 excesssive gaps, gap voltage rising Z axis 3 moves downward: on the contrary Z axis 3 moves upward.Go round and begin again, make to keep a rational gap between electrode 1 and the workpiece 4, to guarantee the stable of discharge processing.Dc source divides high pressure 300V and low pressure 80V, the function of high pressure: be the processing of disruptive discharge passage or little electric current, little of electric current provides 5% electric energy; The function of low pressure: be large electric current processing, 95% electric energy is provided.The HF switch function: be to allow the state that keeps spark discharge between electrode and the workpiece, its pulse width and interval width have determined surface roughness and the electrode wear rate of workpiece to be machined; Gap between electrode 1 and the workpiece 4 is added by mineral oil and is filled, spark discharge adds a large amount of metal particle that produces man-hour and will outwards spread out out from the gap of only having several millimeters of percentage, the initiation electrode that the metal particle that these electric conductivities are good is regular and the partial short-circuit between the workpiece increase processing electric current rapidly.If without restriction to processing electric current, the be bound to finished surface of defective work piece and the safety that jeopardizes the HF switch pipe therefore at height, have increased current-limiting resistance R1 in the low tension loop, and R2 is with the restriction processing electric current.Increased current-limiting resistance R1, R2 has solved the problem of short circuit current, but following deficiency is arranged:
Waste energy, increase the complexity of equipment, change the processing electric current of workpiece, the resistance value of the current-limiting resistance that only changes is by changing switch combination in the resistance box to reach the size that changes current-limiting resistance and the discharge current between electrode and the workpiece of flowing through.And resistance box is bulky, have now and tell about the space that middle resistance box has occupied electric discharge machining apparatus switch board 1/3, simultaneously in order not allow the normal operation of other system of heat effects that resistance box produces, the outside powerful air draft of several desk fans is housed with heat radiation in the Chi resistance box, has further increased energy consumption.
The utility model content
The purpose of this utility model is, for the defects of prior art, a kind of electric discharge machining apparatus that uses constant-current supply is provided, in power circuit, do not need to increase current-limiting resistance, save the energy consumption of bringing owing to current-limiting resistance, reduce simultaneously the complexity of equipment.
The technical scheme that the utility model provides is as follows: a kind of electric discharge machining apparatus, comprise mechanical system, electrode, servo-drive system and high-frequency power supply circuit, high-frequency power supply circuit is connected between workpiece and the electrode, for discharge between workpiece and the motor provides suitable voltage and current, described high-frequency power supply circuit comprises the low pressure constant-current switch power source, the high voltage and constant current Switching Power Supply, high-frequency signal circuit and HF switch, the positive source of low pressure constant-current switch power source and high voltage and constant current Switching Power Supply connects respectively described electrode, mutually isolation between low pressure constant-current switch power source and the high voltage and constant current Switching Power Supply, HF switch is connected between the ground of workpiece and low pressure constant-current switch power source and high voltage and constant current Switching Power Supply, its switch termination high-frequency signal circuit, under the control of high-frequency signal circuit, high-frequency power supply circuit is carried out overcurrent protection, voltage between electrode and workpiece is during less than 20V, HF switch is disconnected, and high-frequency signal circuit is by determining to produce the control signal to HF switch to voltage detecting between electrode and the workpiece;
Described Constant Electric Current comprises one-level rectification circuit, frequency conversion electric bridge, transformer, secondary rectification circuit in a steady stream; The input termination civil power of one-level rectification circuit, the input that output termination variable-frequency electric is analysed becomes direct current with the commercial power rectification; Frequency changer circuit comprises electric bridge and the control IC that is comprised of triode V1, V2, V3, V4, wherein triode V1 and V3 in the electric bridge, V2 and V4 are series at respectively the output of one-level rectification circuit, at triode V1 and V3, the primary coil of series transformer between V2 and the V4, wherein when triode V1 during with the V3 conducting during from V2 and V4 conducting electric current sense of current in transformer different, control IC connects respectively the base stage of triode V1, V2, V3, V4,, control triode switching, direct current is transformed into high-frequency alternating current; The primary coil of transformer connects the output of frequency changer circuit, and three taps of secondary coil connect respectively the secondary rectification circuit; The secondary rectification circuit comprises commutation diode D1 and D2, commutation capacitor C, the P utmost point of commutation diode D1 and D2 connects respectively two tap of transformer secondary output coil, N output extremely in parallel, the centre tap of transformer secondary output coil is output ground, and commutation capacitor C is connected across between output and the ground.
A diode is respectively arranged in described low pressure constant-current switch power source and the high voltage and constant current Switching Power Supply, and its positive pole connects the positive source negative pole and connects described HF switch; Described HF switch is triode, and its emitter and collector is connected to respectively between the ground of workpiece and high frequency electric source, and base stage connects described high-frequency signal circuit; Described low-tension current circuit is the constant-current source of 50V, 50A, and described high-tension current circuit is 300, the constant-current source of V5A.
The utility model adopts the high-power constant current power supply of low pressure (50V) to replace the low-pressure section of former dc source; The high-pressure section that replaces former dc source with high pressure (300V.5A) constant-current supply, in high-frequency signal circuit 8, increased excess current protective function: when processing produces overcurrent, be the gap voltage＜20V between electrode and the workpiece, but the automatic cut-off of HF switch pipe; Owing to having used constant-current source, make electric discharge machining apparatus reduce energy consumption, saved use cost.
Description of drawings
The below illustrates the course of work of the present invention with embodiment with reference to the accompanying drawings
Electric discharge machining apparatus fundamental diagram in Fig. 1 prior art
This electric discharge machining apparatus of Fig. 2 schematic diagram
The constant-current supply output part circuit diagram of Fig. 3 electric discharge machining apparatus;
The specific embodiment
As shown in Figure 2, design a kind of electric discharge machining apparatus, be provided with mechanical system, electrode 1, servo-drive system and high-frequency power supply circuit, band moving electrode 1 is done upper and lower motion under the driving of the servomotor 2 of the Z axis 3 in the mechanical system in servo-drive system, Z axis 3 moves upward or moves downward the gap voltage that produces when depending on sub-electrode 1 with workpiece 4 discharge, when electrode 1 and workpiece 4 excesssive gaps, gap voltage rising Z axis 3 moves downward; Otherwise Z axis 3 moves upward.Go round and begin again, make to keep a rational gap between electrode 1 and the workpiece 4, to guarantee the stable of discharge processing.High-frequency power supply circuit is connected between workpiece 4 and the electrode 1; for discharge between workpiece 4 and the electrode 1 provides suitable voltage and current; described high-frequency power supply circuit comprises low pressure constant-current switch power source 7; high voltage and constant current Switching Power Supply 6; high-frequency signal circuit 8 and HF switch 5; the positive source of low pressure constant-current switch power source 7 and high voltage and constant current Switching Power Supply 6 connects respectively described electrode 1; utilize two diodes mutually to isolate between low pressure constant-current switch power source 7 and the high voltage and constant current Switching Power Supply 6; one of them diode cathode connects the output of low pressure constant-current switch power source 7; negative pole receiving electrode 1; another diode cathode connects the output of high voltage and constant current Switching Power Supply 6; negative pole receiving electrode 1; HF switch 5 be connected in workpiece 4 and low pressure constant-current switch power source 7 and high voltage and constant current Switching Power Supply 6 jointly between; its switch termination high-frequency signal circuit 8; under the control of high-frequency signal circuit 8, high-frequency power supply circuit is carried out overcurrent protection; voltage between electrode 1 and workpiece 4 disconnects HF switch 5 during less than 20V.
As shown in Figure 3, constant-current supply comprises one-level rectification circuit, frequency conversion electric bridge, transformer, secondary rectification circuit: the input termination civil power of one-level rectification circuit, and the input of output termination variable-frequency electric bridge becomes direct current with the commercial power rectification; Frequency changer circuit comprises electric bridge and the control IC that is comprised of triode V1, V2, V3, V4, wherein triode V1 and V3 in the electric bridge, V2 and V4 divide and cut the output that is series at the one-level rectification circuit to pieces, at triode V1 and V3, the primary coil of series transformer between V2 and the V4, wherein when triode V1 during with the V3 conducting during from V2 and V4 conducting electric current sense of current in transformer different, control IC connects respectively the base stage of triode V1, V2, V3, V4, the switching of control triode is transformed into high-frequency alternating current with direct current; The primary coil of transformer connects the output of frequency conversion electric bridge, and three taps of secondary coil connect respectively the secondary rectification circuit; The secondary rectification circuit comprises commutation diode D1 and D2, commutation capacitor C, the P utmost point of commutation diode D1 and D2 connects respectively two tap of transformer secondary output coil, N output extremely in parallel, the centre tap of transformer secondary output coil is output ground, and commutation capacitor C is connected across between output and the ground.
Operation principle is as follows:
As shown in Figure 3, triode V1, V3 and V2, V4 is alternate conduction under the driving of 1C, the frequency of alternate conduction is 1000KHz under the driving of IC, switching frequency high (100Kf) makes transformer primary side coil generation alternating current sense secondary winding and after full-wave rectification, exports, owing to even if the capacity of filter condenser C is little, also can obtain good ripple coefficient.
Can regard the discharge channel of spark machined machine electrode as a variable resistor R, when R diminishes, output current increases, this moment, IC can change the dutycycle of drive waveforms, reduced pulse width (frequency is constant), and output voltage U o descends, output current is reduced: on the contrary electric current output is gone up.
1, because the effect of capacitor C, the adjusting of output voltage is level and smooth transition, can not produce " cutting effect " to the high frequency waveforms of electric discharge machining apparatus.
2, in the constant-current source, IC switching frequency (S level) is higher than the frequency (mS level) of electric discharge machining apparatus high frequency far away, in the power supply, the adjusting of the dutycycle of triode ON time just changes the envelope of electric discharge machining apparatus high frequency, can not change the wide shelf of its pulse and interval width.
The low-pressure section that replaces former dc source with the high-power constant current power supply 7 of low pressure (50V); The high-pressure section that replaces former dc source with high pressure (300V.5A) constant-current supply 6; increased excess current protective function in high-frequency signal circuit 8: when processing produced overcurrent, namely the gap voltage between electrode and the workpiece＜20V HF switch pipe 5 can automatic cut-off.
Claims (2)
1. electric discharge machining apparatus, comprise mechanical system, electrode, servo-drive system and high-frequency power supply circuit, high-frequency power supply circuit is connected between workpiece and the electrode, for discharge between workpiece and the motor provides suitable voltage and current, it is characterized in that, described high-frequency power supply circuit comprises the low pressure constant-current switch power source, the high voltage and constant current Switching Power Supply, high-frequency signal circuit and HF switch, the positive source of low pressure constant-current switch power source and high voltage and constant current Switching Power Supply connects respectively described electrode, mutually isolation between low pressure constant-current switch power source and the high voltage and constant current Switching Power Supply, HF switch is connected between the ground of workpiece and low pressure constant-current switch power source and high voltage and constant current Switching Power Supply, its switch termination high-frequency signal circuit, under the control of high-frequency signal circuit, high-frequency power supply circuit is carried out overcurrent protection, voltage between electrode and workpiece is during less than 20V, HF switch is disconnected, and high-frequency signal circuit is by determining to produce the control signal to HF switch to voltage detecting between electrode and the workpiece;
Described Constant Electric Current comprises one-level rectification circuit, frequency conversion electric bridge, transformer, secondary rectification circuit in a steady stream; The input termination civil power of one-level rectification circuit, the input that output termination variable-frequency electric is analysed becomes direct current with the commercial power rectification; Frequency changer circuit comprises electric bridge and the control IC that is comprised of triode V1, V2, V3, V4, wherein triode V1 and V3 in the electric bridge, V2 and V4 are series at respectively the output of one-level rectification circuit, at triode V1 and V3, the primary coil of series transformer between V2 and the V4, wherein when triode V1 during with the V3 conducting during from V2 and V4 conducting electric current sense of current in transformer different, control IC connects respectively the base stage of triode V1, V2, V3, V4,, control triode switching, direct current is transformed into high-frequency alternating current; The primary coil of transformer connects the output of frequency changer circuit, and three taps of secondary coil connect respectively the secondary rectification circuit; The secondary rectification circuit comprises commutation diode D1 and D2, commutation capacitor C, the P utmost point of commutation diode D1 and D2 connects respectively two tap of transformer secondary output coil, N output extremely in parallel, the centre tap of transformer secondary output coil is output ground, and commutation capacitor C is connected across between output and the ground.
2. a kind of electric discharge machining apparatus according to claim 1 is characterized in that, a diode is respectively arranged in described low pressure constant-current switch power source and the high voltage and constant current Switching Power Supply, and its positive pole connects the positive source negative pole and connects described HF switch; Described HF switch is triode, and its emitter and collector is connected to respectively between the ground of workpiece and high frequency electric source, and base stage connects described high-frequency signal circuit; Described low-tension current circuit is the constant-current source of 50V, 50A, and described high-tension current circuit is 300, the constant-current source of V5A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220054033 CN202763233U (en) | 2012-02-20 | 2012-02-20 | Electric spark processing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220054033 CN202763233U (en) | 2012-02-20 | 2012-02-20 | Electric spark processing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202763233U true CN202763233U (en) | 2013-03-06 |
Family
ID=47769833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220054033 Expired - Fee Related CN202763233U (en) | 2012-02-20 | 2012-02-20 | Electric spark processing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202763233U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433577A (en) * | 2013-08-12 | 2013-12-11 | 清华大学 | Pulse power supply applied to electric spark discharge machining |
| CN108422055A (en) * | 2017-02-13 | 2018-08-21 | 北京机床所精密机电有限公司 | A kind of waveform controlling method of spark pulse power and the electric power outputting current |
| TWI708647B (en) * | 2018-12-12 | 2020-11-01 | 慶鴻機電工業股份有限公司 | The power supply device of an energy-saving discharge machine |
| CN114639835A (en) * | 2022-03-17 | 2022-06-17 | 国网电力科学研究院武汉南瑞有限责任公司 | Graphite felt electrode etched with flow channel for all-vanadium redox flow battery and etching method |
-
2012
- 2012-02-20 CN CN 201220054033 patent/CN202763233U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433577A (en) * | 2013-08-12 | 2013-12-11 | 清华大学 | Pulse power supply applied to electric spark discharge machining |
| CN103433577B (en) * | 2013-08-12 | 2015-08-12 | 清华大学 | Be applied to the pulse power of spark discharge processing |
| CN108422055A (en) * | 2017-02-13 | 2018-08-21 | 北京机床所精密机电有限公司 | A kind of waveform controlling method of spark pulse power and the electric power outputting current |
| TWI708647B (en) * | 2018-12-12 | 2020-11-01 | 慶鴻機電工業股份有限公司 | The power supply device of an energy-saving discharge machine |
| CN114639835A (en) * | 2022-03-17 | 2022-06-17 | 国网电力科学研究院武汉南瑞有限责任公司 | Graphite felt electrode etched with flow channel for all-vanadium redox flow battery and etching method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102101207A (en) | Current type energy-saving electric spark machining pulse power supply with adjustable no-load voltage | |
| JP2007038400A (en) | Method and generator for electrical discharge machining | |
| US9205504B2 (en) | Self-adjusting power device for high efficiency electrical discharge machining and method thereof | |
| JP2007038401A (en) | Method and generator for electrical discharge machining | |
| CN202763233U (en) | Electric spark processing machine | |
| CN201201083Y (en) | Duplicate supply mode pulse power source for numerical control electrospark wire-electrode cutting | |
| CN102909444B (en) | Pulsed power supply with parallel high-energy capacitors for electrosparking | |
| CN100528441C (en) | Electric spark machine | |
| CN103056461B (en) | High-frequency impulse power supply of electric spark texturing system | |
| CN202053010U (en) | IGBT digital and multifunctional gas shielded arc-welding soft switch inversion power supply | |
| CN105742095A (en) | Vacuum switch tube direct-current steep-wave bipolar large-current impact aging device and process | |
| CN201579532U (en) | High-voltage arc striking circuit for plasma cutting machine and argon arc welder | |
| CN203165680U (en) | Oil-immersed on-load tap-changer used for transformer | |
| CN104506073A (en) | Electric spark power source and working method thereof | |
| CN204603539U (en) | A kind of A.C. welder energy-saving protective control circuit | |
| CN107538106A (en) | Welding machine arc-maintaining device | |
| CN203292680U (en) | Self-adaptive polarity-variable plasma arc welding power source | |
| CN201572979U (en) | Current type energy saving electrical spark processing pulse power supply with adjustable no-load voltage | |
| CN204397103U (en) | A kind of chopped mode energy-saving electrical adds working pulse power source | |
| CN204633635U (en) | Electric spark power supply | |
| CN203621745U (en) | Three-purpose inverter welder | |
| CN2855609Y (en) | High frequency impulse electric power used for electric spark processing | |
| CN203371140U (en) | Intelligent control high frequency pulse power supply | |
| CN110977063A (en) | Modularized resistance-free energy-saving electric spark machining power supply | |
| CN203883679U (en) | LED switching power source controller integrated circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160603 Address after: 341200 Jiangxi city of Ganzhou province Shangyou Industrial Park Patentee after: JIANGXI LISU CNC MACHINERY CO., LTD. Address before: 523000, No. 7, building 1, block C3, 7 garden, No. two, Xin'an Road, Changan, Guangdong, Dongguan, China Patentee before: He Liheng |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20170220 |