CN103706897A - On-line measuring device and method for conductivity of electrolyte solution in electrolytic machining - Google Patents
On-line measuring device and method for conductivity of electrolyte solution in electrolytic machining Download PDFInfo
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Abstract
The invention discloses an on-line measuring device and method for conductivity of electrolyte solution in electrolytic machining, and belongs to the field of measuring of the conductivity of the electrolyte solution. The on-line measuring device for the conductivity of the electrolyte solution in electrolytic machining comprises an immersible pump, an insulation pipe, an electromagnetic valve, a conductivity sensor, a conductivity measuring module and a controller, wherein the immersible pump is communicated with the electromagnetic valve through the insulation pipe, the electromagnetic valve is communicated with the conductivity sensor which is connected with the conductivity measuring module, and the controller is connected with the immersible pump, the electromagnetic valve and the conductivity measuring module. The invention further discloses the on-line measuring method for the conductivity of the electrolyte solution in electrolytic machining. The on-line measuring device and method achieve timely and on-line measurement of the conductive of the electrified electrolyte solution in electrolytic machining, a creative method is provided for accurately controlling the conductivity of the electrolyte solution in electrolytic machining, and therefore machining accuracy of electrolytic machining can be improved.
Description
Technical field
The present invention relates to a kind of measurement mechanism and method of electrical conductivity, more particularly, relate to a kind of electrical conductivity on-line measurement device and method of the Electrolyzed Processing electrolyte for non-traditional manufacture field.
Background technology
The processing that machine-building is at present used can be divided into traditional machining and non-traditional processing.
Tradition machining is harder than workpiece material by cutter material, utilizes mechanical energy material removal unnecessary on workpiece, is generally feasible.But when workpiece material is more and more hard, finished surface is more and more under complicated situation, traditional machining can limit production rate and is affected crudy, sometimes even cannot process; If the wall thickness of workpiece more and more little (wall thickness is less than 0.5 millimeter), because traditional machining exists the effect of mechanical force, is easy to damage workpiece to be machined, be difficult to processing tasks.
Non-traditional processing is the special process, realizes with the hard workpiece of soft tool processes, is mainly that employing electricity, chemistry, light, sound and hot homenergic are processed, and between instrument and workpiece, does not have significant machine cut power in process.In special process method, spark machined precision is high, but working (machining) efficiency is low; The efficiency of Electrolyzed Processing is high, but machining accuracy is poor, the main cause that causes Electrolyzed Processing low precision is the unstable of technological parameter in process, wherein the unstable of electrolytic conductivity is the one of the main reasons that affects Electrolyzed Processing low precision, the electrical conductivity of real-time online measuring electrolyte how, and controlled, become the technical problem that those skilled in the art need solution badly.
Summary of the invention
1. the technical problem that invention will solve
The object of the invention is to overcome in existing Electrolyzed Processing, the electrical conductivity of electrolyte is difficult to the deficiency of accurate on-line measurement, the electrical conductivity on-line measurement device and method of electrolyte in a kind of Electrolyzed Processing is provided, adopt technical scheme of the present invention, solved the problem of the electrical conductivity real-time online measuring of charged electrolyte in Electrolyzed Processing, for accurately controlling the conductance of electrolyte in Electrolyzed Processing, provide innovative approach, thereby can improve the machining accuracy of Electrolyzed Processing.
2. technical scheme
For achieving the above object, technical scheme provided by the invention is:
The electrical conductivity on-line measurement device of electrolyte in a kind of Electrolyzed Processing of the present invention, comprise immersible pump, insulation tube, magnetic valve, conductivity sensor, conductivity measurement module and controller, described immersible pump is connected with magnetic valve by insulation tube, described magnetic valve is connected with conductivity sensor, described conductivity sensor is connected with conductivity measurement module, and described controller is connected with immersible pump, magnetic valve and conductivity measurement module respectively.
Further, described conductivity sensor comprises right electrode pad, left electrode pad, sensor body and overflow pipe, described left electrode pad and right electrode pad are arranged at respectively the left and right sides of sensor body, the top of described sensor body connects overflow pipe, bottom connected electromagnetic valve, described left electrode pad is connected with conductivity measurement module by the wiring point arranging on it respectively with right electrode pad.
Further, described sensor body is made by polypropylene plastics pipe, its two ends, left and right are respectively provided with a step, described left electrode pad and right electrode pad glued joint in sensor body by above-mentioned step respectively, the bottom of described sensor body is provided with the gas thread for connected electromagnetic valve, and top is provided with for the through hole with overflow pipe splicing.
Further, the material of described left electrode pad and right electrode pad is graphite or stainless steel or titanium alloy or platinum; Described overflow pipe is made by polypropylene soft pipe.
Further, described conductivity measurement module comprises voltage measuring apparatus, current measuring device and AC power, and described conductivity sensor, current measuring device and AC power series connection, for measuring the electric current that flows through conductivity sensor; Described conductivity sensor and voltage measuring apparatus are in parallel, for measuring the voltage at conductivity sensor two ends.
Further, described magnetic valve is pressure-less valve, and its operating pressure is 0.005MPa～0.5MPa, and controlling voltage is 12V DC voltage, and valve material is 304 stainless steels or 316 stainless steels or 316SS stainless steel or 316L stainless steel.
Further, described controller is the time interval and adjustable time controller of sampling time.
In a kind of Electrolyzed Processing of the present invention, the electrical conductivity On-line Measuring Method of electrolyte, the steps include:
(1) above-mentioned electrical conductivity on-line measurement device is installed in the electrolyte system of Electrolyzed Processing, makes in the electrolyte of immersible pump in electrolytic cell;
(2) controller controls according to certain time interval that immersible pump carries out work, magnetic valve is opened, and the electrolyte in electrolytic cell is flow in conductivity sensor through insulation tube, and flow back in electrolytic cell by the overflow pipe of conductivity sensor;
(3) controller is controlled conductivity sensor after sampling a period of time, control closed electromagnetic valve, control immersible pump simultaneously and quit work, the now insulation of the electrolyte in conductivity sensor, produces certain resistance between the left electrode pad of conductivity sensor and right electrode pad;
(4) conductivity measurement module is measured the electrolytic conductivity in conductivity sensor.
Further, the measurement described in step (4) comprises flowing through the measurement of electric current and the voltage between conductivity sensor two-plate of conductivity sensor two-plate, and calculates, and computing formula is:
In formula, the electrical conductivity that σ is electrolyte; L is the distance between the electrode pad of left and right; D is the internal diameter of sensor body; V is the voltage between conductivity sensor two-plate; I is the electric current that flows through conductivity sensor two-plate.
3. beneficial effect
Adopt technical scheme provided by the invention, compare with existing known technology, there is following remarkable result:
(1) the electrical conductivity on-line measurement device and method of electrolyte in a kind of Electrolyzed Processing of the present invention, solved the problem of the electrical conductivity real-time online measuring of charged electrolyte in Electrolyzed Processing, for accurately controlling the conductance of electrolyte in Electrolyzed Processing, provide innovative approach, thereby can improve the machining accuracy of Electrolyzed Processing;
(2) the electrical conductivity on-line measurement device of electrolyte in a kind of Electrolyzed Processing of the present invention, its immersible pump is connected with magnetic valve by insulation tube, magnetic valve is connected with conductivity sensor, conductivity sensor is connected with conductivity measurement module, controller is connected with immersible pump, magnetic valve respectively, in electrochemical machining process, guarantee that the state of conductivity sensor electrolyte inside is identical with the state of the electrolyte of electrolytic cell machining area, simple in structure, measurement convenience;
(3) the electrical conductivity on-line measurement device of electrolyte in a kind of Electrolyzed Processing of the present invention, its left electrode pad and right electrode pad are arranged at respectively the left and right sides of sensor body, the top of sensor body connects overflow pipe, bottom connected electromagnetic valve, left electrode pad is connected with conductivity measurement module by the wiring point arranging on it respectively with right electrode pad, the electric current that flows through left electrode pad and right electrode pad by measurement can draw the conductance of electrolyte, measures accurately;
(4) the electrical conductivity on-line measurement device of electrolyte in a kind of Electrolyzed Processing of the present invention, its sensor body is made by polypropylene plastics pipe, its two ends, left and right are respectively provided with a step, left electrode pad and right electrode pad glued joint in sensor body by above-mentioned step respectively, the bottom of sensor body is provided with the gas thread for connected electromagnetic valve, top is provided with for the through hole with overflow pipe splicing, manufactures simple, easy for installation;
(5) the electrical conductivity on-line measurement device of electrolyte in a kind of Electrolyzed Processing of the present invention, conductivity measurement module comprises voltage measuring apparatus, current measuring device and AC power, conductivity sensor, current measuring device and AC power series connection, for measuring the electric current that flows through conductivity sensor, conductivity sensor and voltage measuring apparatus are in parallel, for measuring the voltage at conductivity sensor two ends, by measurement, flow through the electric current of conductivity sensor and the voltage at conductivity sensor two ends, by simple calculating, just can draw the electrical conductivity of electrolyte; Controller is connected with conductivity measurement module, for acquisition stream, crosses the electric current of conductivity sensor and controls conductivity measurement module and carry out the demonstration of electrical conductivity, is convenient to the electrical conductivity of electrolyte to control, to improve the machining accuracy of Electrolyzed Processing;
(6) the electrical conductivity On-line Measuring Method of electrolyte in a kind of Electrolyzed Processing of the present invention, controller controls according to certain time interval that immersible pump carries out work, magnetic valve is opened, electrolyte in electrolytic cell is flow in conductivity sensor through insulation tube, and flow back in electrolytic cell by the overflow pipe of conductivity sensor; After sampling a period of time, control closed electromagnetic valve, control immersible pump simultaneously and quit work, in electrochemical machining process, can realize the instantaneous electrical conductivity of real-time online measuring electrolyte, thereby realize the real-time control of electrical conductivity.
Accompanying drawing explanation
Fig. 1 is the electrical conductivity on-line measurement apparatus structure schematic diagram of electrolyte in a kind of Electrolyzed Processing of the present invention;
Fig. 2 is the measuring circuit figure of the conductivity measurement module of embodiment in the present invention.
Label declaration in schematic diagram:
1, electrolytic cell; 2, immersible pump; 3, insulation tube; 4, magnetic valve; 5, conductivity sensor; 6, conductivity measurement module; 7, controller; 5-1, right electrode pad; 5-2, left electrode pad; 5-3, sensor body; 5-4, overflow pipe.
The specific embodiment
For further understanding content of the present invention, the present invention is described in detail by reference to the accompanying drawings.
As shown in Figure 1, in a kind of Electrolyzed Processing of the present invention, the electrical conductivity on-line measurement device of electrolyte comprises immersible pump 2, insulation tube 3, magnetic valve 4, conductivity sensor 5, conductivity measurement module 6 and controller 7, immersible pump 2 is connected with magnetic valve 4 by insulation tube 3, magnetic valve 4 is connected with conductivity sensor 5, conductivity sensor 5 is connected with conductivity measurement module 6, and controller 7 is connected with immersible pump 2, magnetic valve 4 and conductivity measurement module 6 respectively.Conductivity sensor 5 comprises right electrode pad 5-1, left electrode pad 5-2, sensor body 5-3 and overflow pipe 5-4, left electrode pad 5-2 and right electrode pad 5-1 are arranged at respectively the left and right sides of sensor body 5-3, the top of sensor body 5-3 connects overflow pipe 5-4, bottom connected electromagnetic valve 4, left electrode pad 5-2 is connected with conductivity measurement module 6 by the wiring point arranging on it respectively with right electrode pad 5-1.Two ends, sensor body 5-3 left and right are respectively provided with a step, left electrode pad 5-2 and right electrode pad 5-1 glued joint in sensor body 5-3 by above-mentioned step respectively, the bottom of sensor body 5-3 is provided with the gas thread for connected electromagnetic valve 4, and top is provided with for the through hole with overflow pipe 5-4 splicing.
As shown in Figure 2, the conductivity measurement module 6 in the present invention comprises voltage measuring apparatus, current measuring device and AC power, and conductivity sensor 5, current measuring device and AC power series connection, for measuring the electric current that flows through conductivity sensor 5; Conductivity sensor 5 and voltage measuring apparatus are in parallel, for measuring the voltage at conductivity sensor 5 two ends; Controller 7 is connected with conductivity measurement module 6, for acquisition stream, crosses the electric current of conductivity sensor 5 and controls conductivity measurement module 6 and carry out the demonstration of electrical conductivity.
Below in conjunction with embodiment, the invention will be further described.
Embodiment
As everyone knows, Electrolyzed Processing is the processing of a kind of gap, the stable precision that has determined Electrolyzed Processing in gap of Electrolyzed Processing.At machining voltage and machined material, certain in the situation that, the ablation speed of the gap length of Electrolyzed Processing and material is inversely proportional to, and is directly proportional to the electrical conductivity of electrolyte, therefore, controls the electrical conductivity of electrolyte in Electrolyzed Processing and just can control the gap of Electrolyzed Processing.But electrolyte conducts electricity in Electrolyzed Processing, this has brought difficulty to the conductance of accurately measuring electrolyte.
According to Faraday's laws of electrolysis, during electrolysis, on electrode, the amount of dissolved substance is directly proportional to Faradaic current size and time.Within the unit interval, the size of controlling Faradaic current just equals to have controlled the ablation amount of Electrolyzed Processing, has controlled the precision of Electrolyzed Processing.Because the electrical conductivity of Faradaic current, voltage and electrolyte is directly proportional, general Electrolyzed Processing is constant voltage processing, therefore, as long as controlled the conductance of electrolyte in Electrolyzed Processing, has just controlled the precision of Electrolyzed Processing.
Based on above-mentioned principle, as shown in Figure 1, in a kind of Electrolyzed Processing of the present embodiment, the electrical conductivity on-line measurement device of electrolyte, comprises immersible pump 2, insulation tube 3, magnetic valve 4, conductivity sensor 5, conductivity measurement module 6 and controller 7.Immersible pump 2 is connected with magnetic valve 4 by insulation tube 3, and immersible pump 2 is arranged in below the liquid level of electrolytic cell 1 electrolyte, for the electrolyte of electrolytic cell 1 is delivered in conductivity sensor 5; Magnetic valve 4 is connected with conductivity sensor 5, and for controlling the break-make of insulation tube 3 pipelines, the electrolyte in restriction conductivity sensor 5 refluxes; Conductivity sensor 5 is connected with conductivity measurement module 6, for measuring the instantaneous electrical conductivity of conductivity sensor 5 electrolyte insides; Controller 7 is connected with immersible pump 2, magnetic valve 4 and conductivity measurement module 6 respectively, controller 7 is the time interval and adjustable time controller of sampling time, in certain time interval, control that immersible pump 2 opens or cuts out, magnetic valve 4 connects or cuts out, electrolyte is carried out to real-time sampling and measurement, in electrochemical machining process, the state of guaranteeing conductivity sensor 5 electrolyte insides is identical, simple in structure with the state of the electrolyte of electrolytic cell 1 machining area, it is convenient to measure.
Referring to Fig. 2, the conductivity measurement module 6 in the present embodiment comprises voltage measuring apparatus, current measuring device and AC power, and conductivity sensor 5, current measuring device and AC power series connection, for measuring the electric current that flows through conductivity sensor 5; Conductivity sensor 5 and voltage measuring apparatus are in parallel, for measuring the voltage at conductivity sensor 5 two ends, by measurement, flow through the electric current of conductivity sensor 5 and the voltage at conductivity sensor 5 two ends, by simple calculating, just can draw the electrical conductivity of electrolyte; Controller 7 is connected with conductivity measurement module 6, for acquisition stream, crosses the electric current of conductivity sensor 5 and controls conductivity measurement module 6 and carry out the demonstration of electrical conductivity, is convenient to the electrical conductivity of electrolyte to control, to improve the machining accuracy of Electrolyzed Processing.Particularly, voltage measuring apparatus is optional with voltmeter, and current measuring device is optional with ammeter (as shown in Figure 2).
In a kind of Electrolyzed Processing of the present embodiment, the electrical conductivity On-line Measuring Method of electrolyte, the steps include:
(1) above-mentioned electrical conductivity on-line measurement device is installed in the electrolyte system of Electrolyzed Processing, makes in the electrolyte of immersible pump 2 in electrolytic cell 1;
(2) during Electrolyzed Processing, controller 7 controls according to certain time interval that immersible pump 2 carries out work, magnetic valve 4 is opened, electrolyte in electrolytic cell 1 is flow in conductivity sensor 5 through insulation tube 3, and flow back in electrolytic cell 1 by the overflow pipe 5-4 of conductivity sensor 5, identical with the state of the electrolyte of electrolytic cell 1 machining area to guarantee the state of conductivity sensor 5 electrolyte insides;
(3) controller 7 is controlled conductivity sensor after 5 sampling a period of times, controlling magnetic valve 4 closes, control immersible pump 2 quits work simultaneously, the now insulation of the electrolyte in conductivity sensor 5, between the left electrode pad 5-2 of conductivity sensor 5 and right electrode pad 5-1, produce certain resistance, to can accurately measure the electrolyte in conductivity sensor 5;
(4) electrolytic conductivity in 6 pairs of conductivity sensors 5 of conductivity measurement module is measured, this measurement comprises flowing through the measurement of electric current and the voltage between conductivity sensor 5 two-plates of conductivity sensor 5 two-plates, and calculate, computing formula is:
in formula, the electrical conductivity that σ is electrolyte; L is the distance between the electrode pad of left and right; D is the internal diameter of sensor body; V is the voltage between conductivity sensor two-plate; I is the electric current that flows through conductivity sensor two-plate; Realize the instantaneous electrical conductivity of real-time online measuring electrolyte, thereby realized the real-time control of electrical conductivity.
The electrical conductivity on-line measurement device and method of electrolyte in a kind of Electrolyzed Processing of the present invention, solved the problem of the electrical conductivity real-time online measuring of charged electrolyte in Electrolyzed Processing, for accurately controlling the conductance of electrolyte in Electrolyzed Processing, provide innovative approach, thereby can improve the machining accuracy of Electrolyzed Processing.
Below schematically the present invention and embodiment thereof are described, this description does not have restricted, and shown in accompanying drawing is also one of embodiments of the present invention, and actual structure is not limited to this.So, if those of ordinary skill in the art is enlightened by it, in the situation that not departing from the invention aim, without the creationary frame mode similar to this technical scheme and the embodiment of designing, all should belong to protection scope of the present invention.
Claims (9)
1. the electrical conductivity on-line measurement device of electrolyte in an Electrolyzed Processing, it is characterized in that: comprise immersible pump (2), insulation tube (3), magnetic valve (4), conductivity sensor (5), conductivity measurement module (6) and controller (7), described immersible pump (2) is connected with magnetic valve (4) by insulation tube (3), described magnetic valve (4) is connected with conductivity sensor (5), described conductivity sensor (5) is connected with conductivity measurement module (6), described controller (7) respectively with immersible pump (2), magnetic valve (4) is connected with conductivity measurement module (6).
2. the electrical conductivity on-line measurement device of electrolyte in a kind of Electrolyzed Processing according to claim 1, it is characterized in that: described conductivity sensor (5) comprises right electrode pad (5-1), left electrode pad (5-2), sensor body (5-3) and overflow pipe (5-4), described left electrode pad (5-2) and right electrode pad (5-1) are arranged at respectively the left and right sides of sensor body (5-3), the top of described sensor body (5-3) connects overflow pipe (5-4), bottom connected electromagnetic valve (4), described left electrode pad (5-2) is connected with conductivity measurement module (6) by the wiring point arranging on it respectively with right electrode pad (5-1).
3. the electrical conductivity on-line measurement device of electrolyte in a kind of Electrolyzed Processing according to claim 2, it is characterized in that: described sensor body (5-3) is made by polypropylene plastics pipe, its two ends, left and right are respectively provided with a step, described left electrode pad (5-2) and right electrode pad (5-1) glued joint in sensor body (5-3) by above-mentioned step respectively, the bottom of described sensor body (5-3) is provided with the gas thread for connected electromagnetic valve (4), and top is provided with for the through hole with overflow pipe (5-4) splicing.
4. according to the electrical conductivity on-line measurement device of electrolyte in a kind of Electrolyzed Processing described in claim 2 or 3, it is characterized in that: described left electrode pad (5-2) and the material of right electrode pad (5-1) are graphite or stainless steel or titanium alloy or platinum; Described overflow pipe (5-4) is made by polypropylene soft pipe.
5. the electrical conductivity on-line measurement device of electrolyte in a kind of Electrolyzed Processing according to claim 4, it is characterized in that: described conductivity measurement module (6) comprises voltage measuring apparatus, current measuring device and AC power, described conductivity sensor (5), current measuring device and AC power series connection, for measuring the electric current that flows through conductivity sensor (5); Described conductivity sensor (5) and voltage measuring apparatus are in parallel, for measuring the voltage at conductivity sensor (5) two ends.
6. the electrical conductivity on-line measurement device of electrolyte in a kind of Electrolyzed Processing according to claim 5, it is characterized in that: described magnetic valve (4) is pressure-less valve, its operating pressure is 0.005MPa～0.5MPa, controlling voltage is 12V DC voltage, and valve material is 304 stainless steels or 316 stainless steels or 316SS stainless steel or 316L stainless steel.
7. the electrical conductivity on-line measurement device of electrolyte in a kind of Electrolyzed Processing according to claim 6, is characterized in that: described controller (7) is the time interval and adjustable time controller of sampling time.
8. an electrical conductivity On-line Measuring Method for electrolyte in Electrolyzed Processing, the steps include:
(1) the electrical conductivity on-line measurement device described in claim 1 to 7 any one is installed in the electrolyte system of Electrolyzed Processing, makes in the electrolyte of immersible pump (2) in electrolytic cell (1);
(2) controller (7) controls according to certain time interval that immersible pump (2) carries out work, magnetic valve (4) is opened, electrolyte in electrolytic cell (1) is flow in conductivity sensor (5) through insulation tube (3), and flow back in electrolytic cell (1) by the overflow pipe (5-4) of conductivity sensor (5);
(3) controller (7) is controlled conductivity sensor (5) after sampling a period of time, controlling magnetic valve (4) closes, control immersible pump (2) quits work simultaneously, the now insulation of the electrolyte in conductivity sensor (5), produces certain resistance between the left electrode pad (5-2) of conductivity sensor (5) and right electrode pad (5-1);
(4) conductivity measurement module (6) is measured the electrolytic conductivity in conductivity sensor (5).
9. the electrical conductivity On-line Measuring Method of electrolyte in a kind of Electrolyzed Processing according to claim 8, it is characterized in that: the measurement described in step (4) comprises flowing through the measurement of electric current and the voltage between conductivity sensor (5) two-plate of conductivity sensor (5) two-plate, and calculate, computing formula is:
In formula, the electrical conductivity that σ is electrolyte; L is the distance between the electrode pad of left and right; D is the internal diameter of sensor body; V is the voltage between conductivity sensor two-plate; I is the electric current that flows through conductivity sensor two-plate.
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Effective date of registration: 20180308 Address after: 213001 Jiangsu Province, Changzhou City New District Longhutang Innovation Industrial Park Road No. 21 Patentee after: Changzhou Haizhuo precision mould Co. Ltd. Address before: 213022 Wushan Road, Xinbei District, Jiangsu, China, No. 1, No. Patentee before: Changzhou Polytechnic College |