CN110076407A - A kind of ultrasonic modulation time variant voltage efficient electrolysis combined machining method - Google Patents
A kind of ultrasonic modulation time variant voltage efficient electrolysis combined machining method Download PDFInfo
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- CN110076407A CN110076407A CN201910480081.2A CN201910480081A CN110076407A CN 110076407 A CN110076407 A CN 110076407A CN 201910480081 A CN201910480081 A CN 201910480081A CN 110076407 A CN110076407 A CN 110076407A
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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
- B23H5/00—Combined machining
- B23H5/02—Electrical discharge machining combined with electrochemical machining
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Abstract
A kind of ultrasonic modulation time variant voltage efficient electrolysis combined machining method, belong to technical field, this method is in electrochemical machining process, auxiliary is with ultrasonic technique, the cavitation effect for acting on and its generating by ultrasonic high-frequency vibration strengthens the mass-transfer efficiency of contrasted between solid dielectric, realizes the high speed electrochemical dissolution effect of small―gap suture.Simultaneously, periodically increase machining voltage in process, and ultrasonic vibration parameter and electric signal fluctuation parameters are formed into coupling, enforceable weak spark discharge process is actively generated in the processing gap in small―gap suture stage, eliminate the dangerous point domain in gap, promote the limit of cathode tool over feed rate, sufficiently discharges the potential of electrochemical Machining Technology, meet the process requirements that the big surplus of large and medium-sized complex component efficiently removes.
Description
Technical field
The invention belongs to technical fields, are related to a kind of ultrasonic modulation time variant voltage efficient electrolysis processing method, tool
Saying for body is to be related to a kind of modulating action using ultrasonic high-frequency vibration, is formed in the small―gap suture stage by increase voltage mandatory
Spark discharge increases the removal rate of material and the processing method of process stability.
Background technique
In the Hi-Tech equipment in the fields such as national defence, Aeronautics and Astronautics, the energy, key components and parts are just towards " integration, light weight
Change, be thinning " direction develop, thus the integrated member of large amount of complex just comes into being, their general sizes are larger, feature is multiple
It is miscellaneous, structure is frivolous, shapes from blank to part, material removing rate is high.In addition, severe under hot environment in order to cope with
Operating condition, this kind of part generally use the excellent hard-cutting material of the high-temperature behaviors such as titanium alloy, high temperature alloy.Therefore, such
The generally existing low efficiency of part process, it is at high cost, the period is long the problems such as, seriously affect the research and development and production of Hi-Tech equipment
Period.
Electrolyzed Processing is a kind of special process side shaped based on anode workpiece electrochemical dissolution principle realization part
Method.Compared to Conventional machining methods, Electrolyzed Processing also has that tool is lossless, finished surface is unstressed and metamorphic layer, nothing
Overlap and burr, the advantages that process is unrelated with workpiece material mechanical performance.Therefore, electrochemical Machining Technology is highly suitable for adding
The part processing of hard-cutting material in work aerospace field.However, adding under the processing occasion for needing big surplus efficiently to remove
Break gap electrolyte inside, which is difficult to timely update, processes product is difficult to the problems such as excluding in time and also will greatly affect Electrolyzed Processing
Efficiency.
Compound Machining is the processing method that material removal is realized by the comprehensive function of multiple kinds of energy form process,
It can to avoid or reduce the adverse effect that some processes generate when being used alone, it is each even to reach mutually enhancing
From the effect of advantageous feature.China Patent No. ZL201110350813.X patent of invention proposes a kind of micro- essence of difficult-to-machine material
Processing method, processing method Modulated Ultrasonic frequency vibration parameter realize that " electric discharge-electrolysis " in quiescent operation liquid is effectively compound
New Machining Technology.But this method is only used for micro- smart manufacturing field, it is difficult to meet the process requirements that big surplus efficiently removes.Therefore,
A kind of efficient electrolysis Combined Machining Technology is found, in the Hi-Tech equipment for meeting the fields such as national defence, Aeronautics and Astronautics, the energy,
The process requirements that the big surplus of large-scale component efficiently removes have significant meaning.
Summary of the invention
The purpose of the present invention is against the shortcomings and deficiencies of the above prior art, propose that a kind of ultrasonic modulation time variant voltage is efficient
It is electrolysed combined machining method, this method promotes processing product in gap efficiently to arrange using the cavitation of ultrasonic vibration and its generation
It removes, is the steady switching raising condition of high-voltage partial discharge and low-voltage electrolysis using the backlash characteristics during ultrasonic vibration, borrows
The coupling for helping ultrasound parameter and electrical parameter increases voltage by intermittence and implements active discharge, eliminates the danger in gap
Point domain avoids short circuit phenomenon from occurring further develop Electrolyzed Processing skill, it can be achieved that cathode tool feed rate is substantially improved
The potential of art.
The technical scheme is that a kind of ultrasonic modulation time variant voltage efficient electrolysis combined machining method, which is characterized in that
The processing method includes that following two continues the alternate process segment:
Process segment one: time variant voltage shelf depreciation by force；
Process segment two: ultrasonic wave added efficient electrolysis processing；
During the process segment one, ultrasonic signal drives cathode tool to approach anode workpiece to minimum process near gaps
When, power supply output high-frequency high-voltage signal forces the dangerous point domain of bubble Relatively centralized in processing gap to form mandatory spark and puts
Electricity quickly removes the material in dangerous point domain, realizes the Electrolyzed Processing effect of more small―gap suture；
During the process segment two, constant electrical power exports DC low-voltage signal, with the high-frequency vibration of ultrasonic signal, institute
Stating the process segment two includes following procedure:
(1) ultrasonic signal drives cathode tool far from anode workpiece, and pole clearance is gradually increased during being somebody's turn to do, flow at high speed
Electrolyte rapidly by electrochemical dissolution effect generate electrolysate and AB section electric discharge generation galvanic corrosion product and amount of residual heat
Machining area is taken away rapidly, avoids that uncontrollable big energy density electric discharge burn occurs, ensures that process steadily carries out；
(2) ultrasonic signal drives cathode tool to approach anode workpiece, and pole clearance is rapidly shunk during being somebody's turn to do, and flows in gap
Field state also sharply deteriorates therewith, and flow distortion region of the electrolysate in gap is accumulated rapidly, and conductivity continues to decline, secondary
Reaction increases, and a large amount of bubbles generate and are gradually accumulated as in the stage one time variant voltage shelf depreciation process offer physical condition by force；
In whole process, by the coupling in ultrasonic vibration period and electrical parameter signal period, realize that ultrasonic modulation is put
Electricity-electrolysis Compound Machining section and ultrasonic wave added Electrolyzed Processing section alternating action realize the efficient removal of anode workpiece material.
The electrolyte is the neutral salt solution that concentration is greater than 100g/L.
In the process segment one, ultrasonic signal drives cathode tool to approach anode workpiece to minimum process near gaps
When, the local spark discharge that single or continuous several times are formed by adjusting luffing section acts on, i.e. high-frequency impulse period n >=1.
The time variant voltage amplitude of the high-frequency high-voltage signalu 2≈ 60V, the DC voltage amplitude of DC low-voltage signalu 1≈20V。
The cathode tool feed ratefIt can infinitely raise speed, until local spark phenomenon occurs during the process segment one.
Impulse discharge energy is constrained by adjusting the numerical value of high-frequency impulse period n in the process segment one.
The invention has the benefit that a kind of ultrasonic modulation time variant voltage efficient electrolysis Compound Machining side proposed by the present invention
Method, Method And Principle is clear, in electrochemical machining process, assists being acted on and its being generated by ultrasonic high-frequency vibration with ultrasonic technique
Cavitation effect strengthen contrasted between solid dielectric mass-transfer efficiency, realize small―gap suture high speed electrochemical dissolution effect.Meanwhile processed
Journey periodically increases machining voltage, and ultrasonic vibration parameter and electric signal fluctuation parameters are formed coupling, actively at small
Enforceable weak spark discharge process is generated in the processing gap in gap stage, is eliminated the dangerous point domain in gap, is avoided short circuit
The generation of phenomenon promotes the limit of cathode tool over feed rate, sufficiently discharges the potential of electrochemical Machining Technology, meets big
The process requirements that the medium-sized big surplus of complex component efficiently removes.
Detailed description of the invention
Fig. 1 is ultrasonic modulation time variant voltage efficient electrolysis combined machining method schematic diagram of the present invention.
Fig. 2 is process schematic diagram of the present invention.
In figure: DC low-voltage signal 1, high-frequency high-voltage signal 2, luffing section 3, the electrical parameter signal period 4, ultrasonic amplitude 5,
Ultrasonic vibration period 6, ultrasonic modulation discharge-be electrolysed Compound Machining section 7, ultrasonic wave added Electrolyzed Processing section 8, voltage signal 9,
Ultrasonic signal 10, current signal 11, anode workpiece 12, cathode tool 13, power supply 14.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
As shown in Figs. 1-2, a kind of ultrasonic modulation time variant voltage efficient electrolysis combined machining method specific implementation process is as follows:
Cathode tool connects power cathode, anode workpiece connects positive pole.Ultrasonic signal drives cathode tool high-frequency vibration, anode work
The backlash characteristics that the gap numerical value of part and cathode tool changes at regular sexual cycle.
In process, when ultrasonic signal drives cathode tool to approach anode workpiece to minimum process near gaps, such as
In Fig. 1 shown in AB sections.Power supply output high-frequency high-voltage signal forces the dangerous point domain of bubble Relatively centralized in processing gap to be formed by force
Property spark discharge processed quickly removes the material in dangerous point domain, realizes the Electrolyzed Processing effect of more small―gap suture.
In process, ultrasonic signal drives cathode tool far from anode workpiece process, as shown in figure 1 shown in BC sections, power supply
Export DC low-voltage signal.Since the shelf depreciation effect during the stage one eliminates the dangerous point domain in gap, so that should
State smoothly can steadily be implemented.Meanwhile pole clearance is gradually increased during being somebody's turn to do, swiftly flowing electrolyte rapidly will be electric
The galvanic corrosion product and amount of residual heat that the electrolysate and AB sections of electric discharges that chemolysis effect generates generate take away rapidly machining area,
It avoids that uncontrollable big energy density electric discharge burn occurs, ensures that process steadily carries out.
In process, ultrasonic signal drives cathode tool to approach anode workpiece process, and as shown in CA sections in figure, power supply is defeated
DC low-voltage signal out.During this, pole clearance is rapidly shunk, and gap flow field state also sharply deteriorates therewith, and electrolysis produces
Flow distortion region of the object in gap is accumulated rapidly, and conductivity continues to decline, and side reaction increases, and a large amount of bubbles generate and gradually
Being accumulated as time variant voltage in the stage one, shelf depreciation process provides physical condition by force.
By the coupling of ultrasonic vibration parameter signal and electrical parameter signal, realize that the cycle alternation of the above process is made
With achieving the purpose that greatly improve cathode tool feed rate and anode material removal efficiency.
Claims (6)
1. a kind of ultrasonic modulation time variant voltage efficient electrolysis combined machining method, which is characterized in that the processing method includes following
Two continue the alternate process segment:
Process segment one: time variant voltage shelf depreciation by force；
Process segment two: ultrasonic wave added efficient electrolysis processing；
During the process segment one, ultrasonic signal (10) drives cathode tool (13) to approach anode workpiece (12) to minimum
When processing near gaps, power supply (14) exports high-frequency high-voltage signal (2), forces the dangerous point of bubble Relatively centralized in processing gap
Domain forms mandatory spark discharge, quickly removes the material in dangerous point domain, realizes the Electrolyzed Processing effect of more small―gap suture；
During the process segment two, power supply (14) constant output DC low-voltage signal (1), with ultrasonic signal (10)
High-frequency vibration, the process segment two include following procedure:
(1) ultrasonic signal (10) drives cathode tool far from anode workpiece (12), and pole clearance is gradually increased during being somebody's turn to do,
Swiftly flowing electrolyte rapidly produces the electrolysate of electrochemical dissolution effect generation and the galvanic corrosion generated during the stage one
Object and amount of residual heat take away rapidly machining area, avoid that uncontrollable big energy density electric discharge burn occurs, ensure process
It is steady to carry out；
(2) ultrasonic signal (10) drives cathode tool to approach anode workpiece (12), and pole clearance is rapidly shunk during being somebody's turn to do,
Gap flow field state also sharply deteriorates therewith, and flow distortion region of the electrolysate in gap is accumulated rapidly, and conductivity is held
Continuous decline, side reaction increase, and a large amount of bubbles generate and are gradually accumulated as time variant voltage shelf depreciation process offer by force in the stage one
Physical condition；
In whole process, by the coupling in ultrasonic vibration period (6) and electrical parameter signal period (4), ultrasound is realized
Electric discharge-electrolysis Compound Machining section (7) and ultrasonic wave added Electrolyzed Processing section (8) alternating action are modulated, realizes anode workpiece
(12) the efficient removal of material.
2. a kind of ultrasonic modulation time variant voltage efficient electrolysis combined machining method according to claim 1, it is characterised in that: institute
Stating electrolyte is the neutral salt solution that concentration is greater than 100g/L.
3. a kind of ultrasonic modulation time variant voltage efficient electrolysis combined machining method according to claim 1, it is characterised in that: institute
It states in the process segment one, ultrasonic signal (10) drives cathode tool (13) to approach anode workpiece (12) to minimum process near gaps
When, the local spark discharge that single or continuous several times are formed by adjusting luffing section (3) acts on, i.e. and high-frequency impulse period n >=
1。
4. a kind of ultrasonic modulation time variant voltage efficient electrolysis combined machining method according to claim 1, it is characterised in that: institute
State the time variant voltage amplitude of high-frequency high-voltage signal (2)u 2≈ 60V, the DC voltage amplitude of DC low-voltage signal (1)u 1≈20V。
5. a kind of ultrasonic modulation time variant voltage efficient electrolysis combined machining method according to claim 1, it is characterised in that: institute
State cathode tool (13) feed ratefIt can infinitely raise speed, until local spark phenomenon occurs during the process segment one.
6. a kind of ultrasonic modulation time variant voltage efficient electrolysis combined machining method according to claim 1, it is characterised in that: institute
It states in the process segment one and constrains impulse discharge energy by adjusting the numerical value of high-frequency impulse period n.
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| CN110587047A (en) * | 2019-09-18 | 2019-12-20 | 扬州大学 | Turbine mortise ultrasonic-assisted precise electrolytic grinding machining method |
| CN111230239A (en) * | 2020-02-17 | 2020-06-05 | 南京航空航天大学 | Efficient spark electrolysis jet processing method for impact breaking of oxidation film |
| CN113245646A (en) * | 2021-05-18 | 2021-08-13 | 南京航空航天大学 | Cathode and workpiece cooperative pulsation state precision electrolytic machining method |
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| CN111230239A (en) * | 2020-02-17 | 2020-06-05 | 南京航空航天大学 | Efficient spark electrolysis jet processing method for impact breaking of oxidation film |
| CN111230239B (en) * | 2020-02-17 | 2021-01-19 | 南京航空航天大学 | Efficient spark electrolysis jet processing method for impact breaking of oxidation film |
| CN113245646A (en) * | 2021-05-18 | 2021-08-13 | 南京航空航天大学 | Cathode and workpiece cooperative pulsation state precision electrolytic machining method |
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