CN106903382A - A kind of die cavity electric spark machining working solution component monitoring system - Google Patents
A kind of die cavity electric spark machining working solution component monitoring system Download PDFInfo
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- CN106903382A CN106903382A CN201710123598.7A CN201710123598A CN106903382A CN 106903382 A CN106903382 A CN 106903382A CN 201710123598 A CN201710123598 A CN 201710123598A CN 106903382 A CN106903382 A CN 106903382A
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- working solution
- unit
- die cavity
- electric spark
- monitoring system
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention relates to a kind of die cavity electric spark machining working solution component monitoring system, including gaseous mixture sample preparation unit, detector gas circuit unit, embedded control unit and computer digital animation unit；The gaseous mixture sample preparation unit includes the working solution sampling interface, degasser and the gaseous mixture sample feeding device that are sequentially connected, and the degasser and gaseous mixture sample feeding device are connected with embedded control unit respectively；The gaseous mixture sample feeding device is also connected with the detector gas circuit unit；The detector gas circuit unit is connected with the embedded control unit and computer digital animation unit respectively；It is connected by fieldbus between the embedded control unit and computer digital animation unit.
Description
Technical field
The present invention relates to die cavity spark erosion technique field, more particularly to a kind of die cavity electric spark machining working solution into
Divide monitoring system.
Background technology
Die cavity electrical discharge machining is come ablation based on the galvano-cautery phenomenon between instrument and workpiece during pulse feature spark discharge
Unnecessary metal, to reach size to part, shape and the predetermined processing request of surface quality.Ensure process just
Often realize to make often to keep certain discharging gap between tool-electrode and working solution finished surface first, secondly spark is put
Electricity must be instantaneous pulsed discharge.And spark discharge must be carried out in having the liquid medium of certain insulating properties, for example
Kerosene, saponification liquor etc. mix organic liquid medium.Also known as working solution, it must have dielectric strength higher to liquid medium, to have
Beneficial to the spark discharge for producing pulse feature.Liquid medium can also be the small bits of metal, the carbon produced in edm process simultaneously
The galvanic corrosion product such as black suspends from discharging gap and excludes, and has preferable cooling effect to electrode and workpiece surface.
Medium in die cavity edm process between instrument and piece pole is logical by ionizing, puncturing, being formed electric discharge
Behind road, for the electric energy that processing is provided is transformed into kinetic energy, kinetic energy is transformed into heat energy again by collision rift.Then in passage, it is positive and negative
Pole surface respectively becomes instant therm source, reaches temperature very high.High temperature first vaporizes work liquid medium in passage, and then hot tearing
Hydrogen, carbon dioxide, some hydrocarbon gas are cracked into after decomposition gasification, such as kerosene hydrocarbon working solution high temperature and are dissociated
Carbon etc..These catabolites cause the composition of working solution to change in being dissolved in working solution, it is therefore desirable to working solution into
Part carries out real-time monitoring.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of die cavity electric spark machining working solution component monitoring system, real
Now to the analysis of mixed gas composition in electric spark machining working solution.
The technical solution adopted for the present invention to solve the technical problems is：There is provided a kind of die cavity electric spark machining working solution into
Divide at monitoring system, including gaseous mixture sample preparation unit, detector gas circuit unit, embedded control unit and computer data
Reason unit；The gaseous mixture sample preparation unit includes the working solution sampling interface, degasser and the mixing gas sample that are sequentially connected
Product sampling device, the degasser and gaseous mixture sample feeding device are connected with embedded control unit respectively；The mixing
Gas sample product sampling device is also connected with the detector gas circuit unit；The detector gas circuit unit respectively with the embedded control
Unit processed is connected with computer digital animation unit；Pass through between the embedded control unit and computer digital animation unit
Fieldbus is connected.
The working solution sampling interface is the sampling interface agency of two-way operation liquid, by ablation particle filter, electric three passes
Valve and liquid storage fuel tank realize that the row of returning after terminating for the sampling and constituent analysis to die cavity electric machining working solution realizes work
Make the recycling of liquid.
The detector gas circuit unit includes the injection port, the CO that are sequentially connected2The detection of detector, chromatograph box and zirconium oxide
Device；The input of the injection port is also associated with the output end of gas circuit control element, the input of the gas circuit control element with
Carrier gas is connected.
The Zirconia detector is connected by signal attenuation module with computer digital animation unit.
It is heating furnace device outside earthenware, in heating furnace in the tubular zirconium-oxide insertion earthenware of the Zirconia detector
Pt100 temperature sensors are housed in device.
The CO2Detector includes infrared gas sensor and infrared light supply kit；The infrared gas sensor
On have two optical filters, one of optical filter only allows CO2The wavelength that molecule can absorb is that 4.26 μm of infrared light passes through,
For detecting CO2Concentration；Another optical filter constitutes 4.00 μm of optical filter passages, for detecting in air chamber except CO2In addition
The change in concentration situation of other mixed gas.
The embedded control unit carries out bidirectional information by the way of bus communication with computer digital animation unit
Interaction, is connected using analog-to-digital conversion and digital quantity interface mode with detector gas circuit unit, is driven using digital quantity interface and power
Moving cell is connected with gaseous mixture sample preparation unit.
The embedded control unit is by temperature closed loop system to gaseous mixture sample preparation unit and detector gas circuit list
The temperature of unit is controlled.
The embedded control unit receives the information of amount of liquid and amount of gas evolved in degasser, and is passed through according to relevant information
Cross the amount of gas evolved of switch and aperture state the guarantee constant volume working solution that corresponding valve is controlled after calculating is processed, it is ensured that electricity fire
Spend the accurate of processing work liquid constituent analysis.
The computer digital animation unit is using related chromatographic work station software and working solution constituent analysis software reality
Now to the analysis and judge of die cavity electric spark machining working solution composition and processing gap state and processing effect.
Beneficial effect
As a result of above-mentioned technical scheme, the present invention compared with prior art, has the following advantages that and actively imitates
Really：The present invention can realize the analysis to mixed gas composition in electric spark machining working solution, and electric spark is judged on this basis
Processing gap and the assessment and anticipation of machining state, it is ensured that the stability of different operating mode lower impressions edm processes and carry
Processing efficiency high and processing effect.
Brief description of the drawings
Fig. 1 is monitoring system general structure schematic diagram of the invention；
Fig. 2 is embedded control unit structural representation of the invention；
Fig. 3 is Zirconia detector structural representation of the invention；
Fig. 4 is CO of the present invention2Detector arrangement schematic diagram.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content for having read instruction of the present invention, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
Embodiments of the present invention are related to a kind of die cavity electric spark machining working solution component monitoring system, including mixing gas sample
Product preparation unit, detector gas circuit unit, embedded control unit and computer digital animation unit；The gaseous mixture sample system
Standby unit includes the working solution sampling interface, degasser and the gaseous mixture sample feeding device that are sequentially connected, the degasser
It is connected with embedded control unit respectively with gaseous mixture sample feeding device；The gaseous mixture sample feeding device also with the inspection
Device gas circuit unit is surveyed to be connected；The detector gas circuit unit respectively with the embedded control unit and computer digital animation list
Unit is connected；It is connected by fieldbus between the embedded control unit and computer digital animation unit.
Wherein, the embedded control unit is carried out two-way by the way of bus communication with computer digital animation unit
Information exchange, is connected, using digital quantity interface and work(using analog-to-digital conversion and digital quantity interface mode with detector gas circuit unit
Rate driver element is connected with gaseous mixture sample preparation unit.Computer digital animation unit is by PCI board card and universal serial bus and oxygen
Changing zirconium detector and embedded control unit carries out information exchange.Using related chromatographic work station software and working solution composition point
Analysis software realizes the analysis and judge to die cavity electric spark machining working solution composition and processing gap state and processing effect.
Based on the present invention is for die cavity electrical discharge machining chats oil type and kerosene working solution, with reference to chromatographic technique,
The regular sample introduction of headspace sampling method is used by die cavity edm process, with chromatographic technique quantitative analysis combination mass-spectrometric technique
The method of qualitative analysis, it is established that component content and processing stability and the pass of processing efficiency and processing effect in different operating liquid
Coefficient evidence.Data are analyzed and modeled using the method for mathematical statistics and probability theory, is that die cavity electrical discharge machining is put in the future
Electricity condition detection means, processing gap state and crudy analysis and the high speed synthesis type electrical discharge machining work of high-efficiency environment friendly
Liquid provides basis.
A kind of die cavity electric spark machining working solution component monitoring system as shown in Figure 1, including sampled by working solution and the row of returning
The gaseous mixture sample preparation unit that circulation loop is constituted, by deaerating after sample gas and carrier gas sample introduction analysis circuit and detector telecommunications
The detector gas circuit unit that number collection and air circuit needed for monitoring analysis are constituted, embedded control unit and soft equipped with research and application
The computer digital animation unit of part.Wherein, the working solution sampling interface in gaseous mixture sample preparation unit uses two-way operation
The sampling interface agency of liquid, including ablation particle filter, electric three passes valve and liquid storage fuel tank, for working die cavity electric machining
The sampling and constituent analysis of liquid terminate after return row, realize the recycling of working solution.The detector gas circuit unit include according to
The injection port of secondary connection, CO2Detector, chromatograph box and Zirconia detector；The input of the injection port is also associated with gas
The output end of road control element, the input of the gas circuit control element is connected with carrier gas.
Embedded control unit as shown in Figure 2, mainly realizes in system between gas circuit and working solution loop and processor
The two-way intercommunication of various status informations, is the accurate offer basis of gas component analysis in electric spark machining working solution.
The processor of the embedded control unit can be using ARM9 series STM32F103ZET6 as MCU, control association
Adjust each module to operate, and gathered data is processed and is stored and with the communication of host computer etc..
As shown in Fig. 2 the embedded control unit is directed to CO2Detection signal, Pt100 temperature acquisitions and operational hydraulic cylinder liquid
Pass through A/D converting transmitted informations between amount and amount of gas evolved detection and MCU.AD conversion uses 8 passage, 14 precision components, conversion
Speed 16kHz.MCU is connected with Measurement ＆control computer by 232 interfaces, using Modbus bus protocols by embedded control unit
Electric spark machining working solution monitoring system information and state transfer to showing in real time in the HMI of computer.
The embedded control unit is for Zirconia detector, chromatograph box and constant volume head space operational hydraulic cylinder in system
Temperature control is realized by MCU by temperature closed loop system and relevant control algorithm, it is ensured that the control accuracy of operating temperature.Constant volume top
Amount of liquid, amount of gas evolved information are converted into number by sending into AD after sensor and change-over circuit in the degasser of empty operational hydraulic cylinder
Word amount is sent and MCU；MCU ensures permanent according to relevant information by switch and aperture state that corresponding valve is controlled after calculating treatment
Determine the amount of gas evolved of volume working solution, it is ensured that electric spark machining working solution constituent analysis it is accurate.
Due to the zirconium oxide detection corresponding to the high concentration range of the every kind of component of gaseous mixture in detection hydraulic fluid in system
Device output voltage signal peak value beyond pci signal capture card range, therefore using detector export peak value converting unit
Output voltage signal between gas component high concentration region is decayed (i.e. by Zirconia detector and computer data
Setting signal attenuation module between reason unit), peak value converting unit is controlled by embedded control unit, and AD conversion therein is to inspection
The output voltage peak value for surveying device is acquired, according to the attenuation coefficient needed for the range restraint of crest voltage.
As shown in figure 3, be heating furnace device outside earthenware in the tubular zirconium-oxide insertion earthenware of Zirconia detector,
Pt100 temperature sensors are housed in heating furnace.Sensing and the execution of temperature control system are made up of resistance heating wire and Pt100
Mechanism, uses thermostatic control algorithm in MCU, makes heating in-furnace temperature steady in a long-term at 700 DEG C, it is ensured that zirconium oxide output is electronic
Gesture is accurate with gas component measuring concentration of components.
As shown in figure 4, CO2Infrared detector includes infrared gas sensor and infrared light supply kit.Infrared-gas
There are two optical filters on sensor, one of passage only allows CO2The wavelength that molecule can absorb is 4.26 μm of infrared light
Pass through, so the light intensity for reaching this passage reflects CO2Concentration；By another 4.00 μm of light intensity of optical filter passage then
Reflect in air chamber except CO2The change in concentration situation of other mixed gas in addition.
The CO2Infrared detector applies the cycle to infrared light supply for 1S, and dutycycle is 40% DC pulse signal, will
Mixed gas send into air chamber from air inlet.Infrared detector is by CO2Concentration is converted into voltage signal, will by signal front end circuit
With CO2AD conversion into data signal is sent into after concentration dependent electric signal amplification, filtering.After carrying out digital filtering in MCU, adopt
With fieldbus by CO2Concentration amount feeding monitoring computer, CO is obtained using electric spark machining working solution constituent analysis software2Gas
Bulk concentration.
Claims (10)
1. a kind of die cavity electric spark machining working solution component monitoring system, it is characterised in that including gaseous mixture sample preparation unit,
Detector gas circuit unit, embedded control unit and computer digital animation unit；The gaseous mixture sample preparation unit includes
Working solution sampling interface, degasser and the gaseous mixture sample feeding device being sequentially connected, the degasser and mixing gas sample
Product sampling device is connected with embedded control unit respectively；The gaseous mixture sample feeding device also with the detector gas circuit list
Unit is connected；The detector gas circuit unit is connected with the embedded control unit and computer digital animation unit respectively；Institute
State and be connected by fieldbus between embedded control unit and computer digital animation unit.
2. die cavity electric spark machining working solution component monitoring system according to claim 1, it is characterised in that the work
Liquid sampling interface is the sampling interface agency of two-way operation liquid, by ablation particle filter, electric three passes valve and liquid storage fuel tank reality
Existing, the row of returning after terminating for the sampling and constituent analysis to die cavity electric machining working solution realizes the recycling of working solution.
3. die cavity electric spark machining working solution component monitoring system according to claim 1, it is characterised in that the detection
Device gas circuit unit includes the injection port, the CO that are sequentially connected2Detector, chromatograph box and Zirconia detector；The injection port
Input is also associated with the output end of gas circuit control element, and the input of the gas circuit control element is connected with carrier gas.
4. die cavity electric spark machining working solution component monitoring system according to claim 3, it is characterised in that the oxidation
Zirconium detector is connected by signal attenuation module with computer digital animation unit.
5. die cavity electric spark machining working solution component monitoring system according to claim 3, it is characterised in that the oxidation
It is heating furnace device outside earthenware in the tubular zirconium-oxide insertion earthenware of zirconium detector, Pt100 temperature is housed in heating furnace device
Degree sensor.
6. die cavity electric spark machining working solution component monitoring system according to claim 3, it is characterised in that the CO2Inspection
Surveying device includes infrared gas sensor and infrared light supply kit；There are two optical filters on the infrared gas sensor, its
In an optical filter only allow CO2The wavelength that molecule can absorb is that 4.26 μm of infrared light passes through, for detecting CO2Concentration；
Another optical filter constitutes 4.00 μm of optical filter passages, for detecting in air chamber except CO2Other mixed gas is dense in addition
Degree situation of change.
7. die cavity electric spark machining working solution component monitoring system according to claim 1, it is characterised in that the insertion
Formula control unit carries out two-way information interaction by the way of bus communication with computer digital animation unit, using analog-to-digital conversion
And digital quantity interface mode is connected with detector gas circuit unit, using digital quantity interface and power drive unit and gaseous mixture sample
Preparation unit is connected.
8. die cavity electric spark machining working solution component monitoring system according to claim 1, it is characterised in that the insertion
Formula control unit is controlled by temperature closed loop system to the temperature of gaseous mixture sample preparation unit and detector gas circuit unit.
9. die cavity electric spark machining working solution component monitoring system according to claim 1, it is characterised in that the insertion
Formula control unit receives the information of amount of liquid and amount of gas evolved in degasser, and is controlled by after calculating treatment according to relevant information
The switch and aperture state of corresponding valve ensure the amount of gas evolved of constant volume working solution, it is ensured that electric spark machining working solution composition
That analyzes is accurate.
10. die cavity electric spark machining working solution component monitoring system according to claim 1, it is characterised in that the meter
Calculation machine data processing unit is realized to die cavity electric spark using related chromatographic work station software and working solution constituent analysis software
The analysis and judge of processing work liquid composition and processing gap state and processing effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710123598.7A CN106903382B (en) | 2017-03-03 | 2017-03-03 | A kind of type chamber electric spark machining working solution component monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710123598.7A CN106903382B (en) | 2017-03-03 | 2017-03-03 | A kind of type chamber electric spark machining working solution component monitoring system |
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| CN106903382A true CN106903382A (en) | 2017-06-30 |
| CN106903382B CN106903382B (en) | 2019-03-08 |
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| CN103808784A (en) * | 2014-02-17 | 2014-05-21 | 华北电力大学（保定） | Oxygen content measurement device and oxygen content measurement method for zirconium oxide |
| CN204346990U (en) * | 2015-01-05 | 2015-05-20 | 南京特种气体厂有限公司 | Microamounts of Hydrogen in gas and oxygen chromatographic device |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2695969Y (en) * | 2004-05-12 | 2005-04-27 | 刘春宾 | Integral zirconium oxide smoke oxygen analyzer |
| DE102005031177A1 (en) * | 2005-07-04 | 2007-01-11 | Siemens Ag | Vehicle passenger compartment gas mixture constituent measurement procedure uses electrically filtered infrared radiation passed twice through sample holder using mirror on window heat sink |
| CN1912585A (en) * | 2005-08-12 | 2007-02-14 | 深圳迈瑞生物医疗电子股份有限公司 | Method and device for automatic correcting and measuring gas concentration using infrared light absorption characteristic |
| CN201000424Y (en) * | 2007-04-20 | 2008-01-02 | 李清波 | Carbon dioxide analyzer |
| CN201269854Y (en) * | 2008-09-28 | 2009-07-08 | 天津市圣威科技发展有限公司 | Optical sensor for automobile exhaust |
| CN201285372Y (en) * | 2008-10-16 | 2009-08-05 | 陈红岩 | Wireless sensor system for measuring tail gas of automobile |
| CN101832923A (en) * | 2010-06-03 | 2010-09-15 | 中国石油集团川庆钻探工程有限公司长庆录井公司 | Infrared gas detection system suitable for oil-containing gas analysis of reservoir |
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| CN204346990U (en) * | 2015-01-05 | 2015-05-20 | 南京特种气体厂有限公司 | Microamounts of Hydrogen in gas and oxygen chromatographic device |
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| CN106903382B (en) | 2019-03-08 |
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