CN115026363B - Composite ultra-short pulse micro electrolytic machining method - Google Patents
Composite ultra-short pulse micro electrolytic machining method Download PDFInfo
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- CN115026363B CN115026363B CN202210711500.0A CN202210711500A CN115026363B CN 115026363 B CN115026363 B CN 115026363B CN 202210711500 A CN202210711500 A CN 202210711500A CN 115026363 B CN115026363 B CN 115026363B
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- short pulse
- power supply
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- composite
- pressing plate
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- 239000002131 composite material Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000003754 machining Methods 0.000 title claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims description 32
- 238000009413 insulation Methods 0.000 claims description 2
- 230000035939 shock Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 11
- 229910000808 amorphous metal alloy Inorganic materials 0.000 abstract description 7
- 238000002161 passivation Methods 0.000 abstract description 4
- 230000010287 polarization Effects 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
Classifications
-
- 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
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention discloses a composite ultra-short pulse micro electrolytic machining method, which comprises the following steps: step one, a tool electrode is clamped by a first clamping mechanism on a triaxial moving platform and is placed in an electrolytic tank, the negative electrode of a composite ultra-short pulse power supply is connected with the tool electrode, a workpiece is clamped by a second clamping mechanism in the electrolytic tank, and the positive electrode of the composite ultra-short pulse power supply is connected with the workpiece. In micro electrolytic processing of passive materials such as amorphous alloy, the composite pulse electric signal generated by the ultra-short pulse power supply can shorten the charging time of an electric double layer on the surface of an electrode, reduce the generation thickness of a passivation film, improve the processing efficiency, realize the effect of pre-polarization by the pulse positive voltage of the composite pulse, shorten the charge and discharge time of the electric double layer, improve the material removal rate, and compared with the method for improving the output power of the existing power supply by redesigning the internal structure, the method has the advantages of simple control, low cost and strong practicability.
Description
Technical Field
The invention belongs to the technical field of electric machining, and particularly relates to a composite ultra-short pulse micro-electrolytic machining method.
Background
The micro-electrolytic machining is a machining mode for realizing workpiece forming based on anodic dissolution and material removal, has the advantages of good machining surface quality, no residual stress or burrs, no heat affected zone, wide machining material range, no loss of tool electrodes, micro-nano scale theoretical machining precision and the like, and is particularly suitable for precision manufacturing of difficult-to-machine materials.
When the micro-structure molding of the amorphous alloy which is a difficult-to-process material is carried out by the micro-electrochemical machining technology, as the surface of the amorphous alloy material is easier to generate a passivation film than the traditional crystalline alloy material and contains more metal and more kinds of non-metal elements, the material removal rate of the amorphous alloy is lower, and the quality of the machined surface is poorer, so that researchers at the university of western and America propose a composite pulse generating circuit (publication number: CN 103684032B) by optimizing the part with unreasonable internal circuit structure design of the traditional power supply when the amorphous alloy is electrolytically machined. Investigation shows that on the premise of ensuring stable output of nanosecond pulse width, most of the existing composite ultrashort pulse is obtained by redesigning the internal circuit of the power supply, but the method needs a complex circuit structure and more electronic components, has high cost and is complex in manufacturing process.
Disclosure of Invention
The invention aims to provide a composite ultra-short pulse micro-electrolytic machining method for solving the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a composite ultra-short pulse micro electrolytic machining method comprises the following steps:
step one: the tool electrode is clamped by a first clamping mechanism on the triaxial moving platform and is arranged in the electrolytic tank, the negative electrode of the composite ultra-short pulse power supply is connected with the tool electrode, the workpiece is clamped by a second clamping mechanism in the electrolytic tank, and the positive electrode of the composite ultra-short pulse power supply is connected with the workpiece;
step two: and starting the composite ultra-short pulse power supply, collecting and recording voltage and current signal waveforms in the processing process, and adjusting according to the waveform height.
Preferably, in the first step, the electrolytic tank is mounted on the PZT platform, and the triaxial moving platform, the PZT platform and the composite ultra-short pulse power source are both mounted on the vibration isolation platform, wherein the PZT platform is located at the side of the triaxial moving platform, and the composite ultra-short pulse power source is located at the side of the triaxial moving platform.
Preferably, in the first step, the first clamping mechanism comprises a moving hand connected to a Z-axis connecting rod of the three-axis moving platform, a first pressing plate is connected to the bottom of the moving hand, a second pressing plate is arranged at the lower side of the first pressing plate, a first stud is connected to one side of the bottom of the first pressing plate, the first stud penetrates through the second pressing plate and is locked through a first nut, and a tool electrode is pressed between the first pressing plate and the second pressing plate.
Preferably, in the first step, the second clamping mechanism comprises a platen arranged at the inner bottom of the electrolytic tank, one side of the platen is connected with a second stud, a third platen is arranged at the upper side of the platen, the second stud penetrates through the third platen and is locked through a second nut, and the workpiece is pressed between the platen and the third platen.
Preferably, the composite ultrashort pulse power supply in the first step comprises an ultrashort pulse power supply and a direct current power supply, wherein the positive electrode of the ultrashort pulse power supply is connected with a diode I, the positive electrode of the direct current power supply is connected with a diode II, and the diode I and the diode II are connected with a workpiece.
Preferably, in the first step, the first diode and the second diode are rectifier diodes.
Preferably, in the second step, an oscilloscope is used to collect voltage and current signal waveforms in the processing process.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, the composite pulse electric signal generated by the ultra-short pulse power supply can reduce the capacitance loss of the double electric layers, shorten the charge and discharge time of the double electric layers on the surface of the electrode, shorten the charge time of the double electric layers on the surface of the electrode, reduce the generation thickness of a passivation film and improve the processing efficiency in micro electrolytic processing of passive materials such as amorphous alloy, and the pulse positive voltage of the composite pulse can play a role of pre-polarization so as to shorten the charge and discharge time of the double electric layers and improve the material removal rate.
Drawings
FIG. 1 is a schematic view in partial cutaway of the front view of the present invention;
FIG. 2 is a schematic diagram of the power connection of the present invention;
FIG. 3 is a graph showing the actual measurement of a single pulse signal generated by an ultra-short pulse power supply according to the present invention;
fig. 4 is a graph showing actual measurement of a composite pulse signal generated by the ultra-short pulse power supply and the direct current power supply according to the present invention.
In the figure: the device comprises a vibration isolation platform 1, a PZT platform 2, an electrolytic tank 3, a triaxial moving platform 4, a mobile hand 5, a first pressing plate 6, a first stud 7, a second pressing plate 8, a first nut 9, a tool electrode 10, a platen 11, a second stud 12, a third pressing plate 13, a second nut 14, a composite ultra-short pulse power supply 15, an ultra-short pulse power supply 16, a direct current power supply 17, a first diode 18 and a second diode 19.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1, 2, 3 and 4, a composite ultra-short pulse micro electrolytic machining method includes the steps of: step one, the tool electrode 10 is clamped by a first clamping mechanism on a triaxial moving platform 4 and is arranged in an electrolytic tank 3, the first clamping mechanism comprises a moving hand 5 which is fixed on a Z-axis connecting rod of the triaxial moving platform 4 through bolts, the bottom of the moving hand 5 is connected with a first pressing plate 6, the moving hand 5 and the first pressing plate 6 are integrated, a second pressing plate 8 is arranged at the lower side position of the first pressing plate 6, a first stud 7 is connected to the left side of the bottom of the first pressing plate 6, the first pressing plate 6 and the first stud 7 are integrated, the first stud 7 penetrates through a first through hole arranged at the left side of the second pressing plate 8 in a sliding mode and is locked through a first nut 9, the tool electrode 10 is pressed between the first pressing plate 6 and the second pressing plate 8, the triaxial moving platform 4 drives the first clamping mechanism to move in all directions in the electrolytic tank 3, the tool electrode 10 is suitable for being moved to all areas in the electrolytic tank 3 to participate in electrolytic work, the tool electrode Z-direction can also be driven to repeatedly move, the electrolytic tank 3 is fixed on the PZT platform 2 through bolts, the PZT platform 2 is set through the PZT controller, Z-direction vibration of the electrolytic tank 3 can be provided, stripping of electrolytic products on the surface of a workpiece is facilitated, the three-axis moving platform 4 of the electrolytic tank 3, the PZT platform 2 and the composite ultra-short pulse power supply 15 are all fixed on the shock insulation platform 1 through bolts, wherein the PZT platform 2 is positioned on the right side of the three-axis moving platform 4, the composite ultra-short pulse power supply 15 is positioned on the right side of the three-axis moving platform 4, the negative electrode of the composite ultra-short pulse power supply 15 is connected with the tool electrode 10, the workpiece is clamped through a second clamping mechanism in the electrolytic tank 3, the positive electrode of the composite ultra-short pulse power supply 15 is connected with the workpiece, the second clamping mechanism comprises a bedplate 11 at the inner bottom of the electrolytic tank 3, the electrolytic tank 3 and the bedplate 11 are an integral piece, the right side of the bedplate 11 is connected with a second stud 12, the bedplate 11 and the second stud 12 are an integral piece, a third pressing plate 13 is arranged at the upper side position of the bedplate 11, the second stud 12 penetrates through a through hole arranged at the right side of the third pressing plate 13 in a sliding way and is locked by a second nut 14, a workpiece is pressed between the bedplate 11 and the third pressing plate 13, the position of the workpiece is stabilized, the composite ultra-short pulse power supply 15 comprises an ultra-short pulse power supply 16 and a direct current power supply 17, wherein the positive electrode of the ultra-short pulse power supply 16 is connected with a diode I18, the positive electrode of the direct current power supply 17 is connected with a diode II 19, the diode I18 and the diode II 19 are connected with the workpiece, the diode I18 and the diode II 19 are rectifier diodes, can ensure unidirectional current flowing in a circuit, prevent a loop from being formed between the ultra-short pulse power supply 16 and the direct current power supply 17, play a role in protecting a composite power supply, the output waveform of the ultra-short pulse power supply 16 can be rectangular waves, sine waves, triangular waves and the like, the direct current power supply 17 outputs constant direct current signals, and parameters such as amplitude, pulse width, period, duty ratio and the like of the composite ultra-short pulse signals generated by the composite ultra-short pulse power supply 15 are regulated by the ultra-short pulse power supply 16, and the pulse-to-pulse amplitude is regulated by the direct current power supply 17;
step two: the composite ultra-short pulse power supply 15 is started, the voltage and current signal waveforms in the processing process are collected and recorded, and the height of the waveform is adjusted according to the waveform, wherein an induction coil of an oscilloscope is sleeved into the positive electrode wiring of the composite ultra-short pulse power supply 15, and the voltage and current signal waveforms in the processing process are collected.
The working principle of this embodiment is as follows: the tool electrode 10 is fixed on a first clamping mechanism, a workpiece is fixed on a second clamping mechanism in the electrolytic tank 3, electrolyte is poured into the electrolytic tank 3, a composite ultra-short pulse power supply 15 and an oscilloscope are electrified, the positive electrode of the composite ultra-short pulse power supply 15 is connected with the workpiece, the negative electrode is connected with the tool electrode 10, the tool electrode is driven to move repeatedly in the Z direction through a triaxial moving platform 4, and the Z-direction vibration of the electrolytic tank 3 can be provided through a PZT platform 2 so as to accelerate stripping of electrolytic products from the workpiece.
In the process of electrolysis, the capacitance loss of an electric double layer can be reduced, the charge and discharge time of the electric double layer on the surface of an electrode can be shortened through a composite pulse electric signal generated by the ultra-short pulse power supply 15, the charge time of the electric double layer on the surface of the electrode can be shortened in the micro electrolytic processing of passive materials such as amorphous alloy, the generation thickness of a passivation film can be reduced, the processing efficiency can be improved, and the inter-pulse positive voltage of the composite pulse can play a role of pre-polarization, so that the charge and discharge time of the electric double layer can be shortened, the material removal rate can be improved, and compared with a method for improving the output power of the existing power supply through redesigning the internal structure, the control is simple, the cost is low, and the implementation property is strong.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.
Claims (5)
1. The composite ultra-short pulse micro electrolytic machining method is characterized by comprising the following steps of:
step one: the tool electrode (10) is clamped by a first clamping mechanism on the triaxial moving platform (4) and is arranged in the electrolytic tank (3), the negative electrode of the composite ultra-short pulse power supply (15) is connected with the tool electrode (10), the workpiece is clamped by a second clamping mechanism in the electrolytic tank (3), and the positive electrode of the composite ultra-short pulse power supply (15) is connected with the workpiece;
step two: starting a composite ultra-short pulse power supply (15), collecting and recording voltage and current signal waveforms in the processing process, and adjusting according to the waveform height, wherein the amplitude, pulse width, period and duty ratio of a composite ultra-short pulse signal produced by the composite ultra-short pulse power supply (15) are adjusted through an ultra-short pulse power supply (16), and the pulse-to-pulse amplitude is adjusted through a direct current power supply (17);
the composite ultra-short pulse power supply (15) in the first step comprises an ultra-short pulse power supply (16) and a direct current power supply (17), wherein the anode of the ultra-short pulse power supply (16) is connected with a diode I (18), the anode of the direct current power supply (17) is connected with a diode II (19), and the diode I (18) and the diode II (19) are connected with a workpiece; in the first step, the first diode (18) and the second diode (19) are rectifier diodes.
2. The composite ultra-short pulse micro electrochemical machining method according to claim 1, wherein the method comprises the following steps: in the first step, the electrolytic tank (3) is arranged on the PZT platform (2), the triaxial moving platform (4), the PZT platform (2) and the composite ultra-short pulse power supply (15) are all arranged on the shock insulation platform (1), wherein the PZT platform (2) is positioned at the side of the triaxial moving platform (4), and the composite ultra-short pulse power supply (15) is positioned at the side of the triaxial moving platform (4).
3. The composite ultra-short pulse micro electrochemical machining method according to claim 1, wherein the method comprises the following steps: in the first step, the first clamping mechanism comprises a moving hand (5) connected to a Z-axis connecting rod of the three-axis moving platform (4), a first pressing plate (6) is connected to the bottom of the moving hand (5), a second pressing plate (8) is arranged at the lower side of the first pressing plate (6), a first stud (7) is connected to one side of the bottom of the first pressing plate (6), and the first stud (7) penetrates through the second pressing plate (8) and is locked through a first nut (9), and a tool electrode (10) is pressed between the first pressing plate (6) and the second pressing plate (8).
4. The composite ultra-short pulse micro electrochemical machining method according to claim 1, wherein the method comprises the following steps: the first clamping mechanism comprises a platen (11) arranged at the inner bottom of the electrolytic tank (3), one side of the platen (11) is connected with a second stud (12), a third pressing plate (13) is arranged at the upper side of the platen (11), the second stud (12) penetrates through the third pressing plate (13) and is locked through a second nut (14), and a workpiece is tightly pressed between the platen (11) and the third pressing plate (13).
5. The composite ultra-short pulse micro electrochemical machining method according to claim 1, wherein the method comprises the following steps: in the second step, an oscilloscope is adopted to collect voltage and current signal waveforms in the processing process.
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| CN202210711500.0A CN115026363B (en) | 2022-06-22 | 2022-06-22 | Composite ultra-short pulse micro electrolytic machining method |
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