CN111805022A - Plasma-assisted electrolytic machining method and device for implementing same - Google Patents
Plasma-assisted electrolytic machining method and device for implementing same Download PDFInfo
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- CN111805022A CN111805022A CN202010500570.2A CN202010500570A CN111805022A CN 111805022 A CN111805022 A CN 111805022A CN 202010500570 A CN202010500570 A CN 202010500570A CN 111805022 A CN111805022 A CN 111805022A
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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
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
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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
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
Abstract
The invention discloses a plasma-assisted electrolytic machining method and an implementation device, wherein the plasma-assisted electrolytic machining method comprises the following steps: providing a direct current power supply, wherein the positive pole of the direct current power supply is connected with a workpiece, the negative pole of the direct current power supply is connected with a tool electrode, and the tool electrode is of a rod-shaped structure; placing the workpiece and the tool electrode in an electrolyte; and the direct current power supply is switched on, the voltage applied by the direct current power supply is more than 50V, the surface of the tool electrode is wrapped by the plasma generated by high processing voltage induction, and the temperature of the plasma can improve the processing efficiency. Meanwhile, bubbles in the process of inducing the plasma are utilized to disturb the flow field environment, and discharge of electrolysis products is enhanced. The machining method provided by the invention is convenient to operate and good in machining stability, can eliminate stray current in the machining process, realizes high-locality precision machining, and simultaneously keeps the surface of a machined workpiece smooth.
Description
Technical Field
The invention relates to the technical field of electrode processing, in particular to a plasma-assisted electrolytic processing method and an implementation device.
Background
The complicated macro or microstructure of the surface of the superhard or tough material (such as high-temperature alloy, titanium alloy, stainless steel and the like) is widely applied to the fields of optical precision molds (microstructure control light paths), fuel cell reactors (improving reaction area ratio) and biological implantation devices (promoting tissue growth and adhesion), but the processing of the surface structure of the hard or tough material is difficult to realize by the traditional processing method, and the processing efficiency and the processing stability are seriously reduced because the material is easy to have the risk of cutter breaking or cutter sticking in the processing. Electrochemical machining (ECM) is a metal forming process based on anodic dissolution, in which an electrolyte is passed through a gap between a preformed cathode tool and an anode workpiece at a high speed of 10-60m/s, and a low dc voltage of 10-20V is applied, and material removal is formed on the surface of the workpiece material by the principle that an anodic oxidation reaction forms an oxidative dissolution. The electrolytic machining has the non-contact characteristic, can eliminate mechanical force generated in the machining process, has the characteristics of no burr, no thermal stress, no mechanical stress, no microcrack and no abrasion of a tool electrode of a machined workpiece, and ensures that the electrolytic machining technology has wide application in the industrial field. However, in the electrolytic machining, because the side edge of the tool electrode has stray current, lateral corrosion occurs during the machining of a workpiece, and the precision of the electrolytic machining is influenced; meanwhile, the non-processing area has large-scale pitting corrosion, which affects the quality of the non-processing surface, so that the electrolytic processing is limited to be used in occasions with higher contour precision requirements and better surface quality requirements.
In the electrolytic machining, methods for improving the machining accuracy include tool electrode sidewall insulation, multi-potential electrolytic machining, use of a low-concentration electrolyte, and the like. The side wall insulation of the tool electrode is to add an insulating layer on the side wall of the tool electrode, and the confined electric field is only distributed at the tip of the tool electrode, so that the stray current of the side edge is inhibited, the dissolution of the side edge material is reduced, and the electrolytic machining precision is finally improved. However, in the processing method, the side wall insulation process is complicated, and when an external hard insulation layer is used, the insulation layer and an internal tool electrode need to be precisely matched, so that the installation difficulty is high; on the other hand, when the thin film insulating layer is manufactured by using the physical/chemical deposition method, since electrolytic debris, bubbles, joule heat, and the like are generated during electrolytic processing, the insulating layer is easily damaged, and electrolytic processing stability and localization are deteriorated, so that the sidewall insulating method is difficult in manufacturing and mounting the insulating layer. The multi-potential electrolytic machining needs to use a double-output power supply, an insulating layer is needed to be added between a tool electrode and an auxiliary electrode, and the whole electrode structure is very complex. Although the use of low concentration electrolyte can substantially reduce the range of stray current, it also reduces the processing efficiency, resulting in higher processing time and cost for the workpiece.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a plasma-assisted electrolytic machining method and an implementation device, the machining method is convenient to operate and good in machining stability, stray current can be reduced in the machining process, high-locality precision machining is realized, and the surface of a machined workpiece is kept smooth.
The technical scheme adopted by the invention is as follows:
in a first aspect of the present invention, there is provided a plasma-assisted electrolytic processing method comprising the steps of:
providing a direct current power supply, wherein the positive pole of the direct current power supply is connected with a workpiece, the negative pole of the direct current power supply is connected with a tool electrode, and the tool electrode is of a rod-shaped structure;
placing the workpiece and the tool electrode in an electrolyte;
and the direct current power supply is switched on, and the voltage applied by the direct current power supply is more than 50V.
In the present application, "above" is to be understood as including the present number.
According to some embodiments of the invention, the dc power supply is a constant voltage supply, a constant current supply or a pulsed dc supply.
According to some embodiments of the invention, the gap between the workpiece and the tool electrode is 5 μm to 40 mm.
According to some embodiments of the invention, during processing, the tool electrode is excited to generate a plasma, the tool electrode being closely enveloped by the plasma.
Further in accordance with some embodiments of the invention, the plasma is induced to ignite by an electrochemical reaction, and a plasma layer formed by the plasma has a shape identical to a shape of the tool electrode.
Further in accordance with some embodiments of the invention, the plasma may form a localized high temperature during the ignition process.
Further in accordance with some embodiments of the present invention, the plasma creates a severely perturbed flow field environment during excitation.
According to some embodiments of the invention, the electrolyte comprises at least one of a NaOH solution, a KOH solution, and an inorganic salt solution. Preferably, the electrolyte comprises, but is not limited to, NaNO3Solution or NaCl solution.
In a second aspect of the present invention, there is provided an apparatus for performing the above-described plasma-assisted electrolytic processing method, comprising:
the power supply system comprises a direct current power supply, wherein the positive pole of the direct current power supply is used for connecting a workpiece, the negative pole of the direct current power supply is connected with a tool electrode, and the tool electrode is of a rod-shaped structure;
and the working solution system comprises an electrolytic tank, the electrolytic tank is used for containing electrolyte, and the workpiece and the tool electrode are immersed in the electrolyte in a working state.
According to some embodiments of the invention, the power system comprises a dc power supply, a function generator, an oscilloscope, and a power probe electrically connected.
According to some embodiments of the invention, the applicator further comprises a feed adjustment device coupled to the tool electrode for adjusting movement of the tool electrode.
The embodiment of the invention has the beneficial effects that:
aiming at the problems of poor processing precision, bad flow field of a processing area and difficult discharge of electrolytic products in the traditional electrolytic processing, and poor quality of the processed surface, the embodiment of the invention provides a plasma-assisted electrolytic processing method, which adopts a mode of raising the voltage in the electrolytic processing to more than 50V by a tool electrode with a rod-shaped structure, utilizes plasma and bubbles generated in high voltage to form a self-excited flow field environment under the tool electrode in the processing process, promotes the discharge of the electrolytic products out of the processing area, and can keep the surface of a processed workpiece smooth. In addition, the generated plasma can improve the temperature of the processing area, an external heat source is not needed in the temperature rising mode, the heating position is not needed to be manually regulated, and the plasma is naturally concentrated in the processing area based on electrochemical induced breakdown, so that the electrolytic processing effect is promoted. The processing method provided by the embodiment of the invention can also control the intensity and action range of the plasma and the bubbles, and form the high-resistivity gas film around the electrode, so that the side wall insulation effect is realized on the side edge of the electrode, and further high-locality precision processing is realized. Compared with a hard insulating layer or a gluing insulating layer, the embodiment of the invention has no additional process, directly and automatically generates the air film in the processing process, has high resistivity of the air film generated by active induction and good insulating effect, can effectively improve the electrolytic processing precision, and simultaneously has the same shape as the tool electrode because the air film is the insulating air film generated by active induction and the shape of the air film is determined by the shape of the tool electrode.
In the conventional electrolytic machining, it is general to avoid the machining voltage from reaching 30V or more because the machining side etching amount is larger and the machining accuracy is lower as the machining voltage is larger. The high-precision machining device ingeniously utilizes the characteristic that a large number of bubbles can be generated when the machining voltage is high, and utilizes the high-resistivity bubbles to carry out electric field restraint, so that the characteristic that the high machining precision is still maintained when the machining voltage reaches 50V is realized. On the other hand, in the electrolytic electric discharge machining method, the electrolytic electric discharge machining can be realized only by keeping a micron-sized machining gap, and when the tool electrode is separated from the workpiece or the distance between the tool electrode and the workpiece is larger, sparks are not generated any more, so that the electrolytic electric discharge machining method has the characteristic of realizing the machining only by approaching. By using the processing method of the embodiment of the invention, new peripheral parts are not required to be added, the plasma can always appear on the surface of the tool electrode, no matter the tool electrode is close to or far away from the workpiece, the plasma package can be formed, namely, the plasma can be excited under the gap of micron or centimeter level, and the tool electrode is equivalent to a cutter wrapped by the plasma to cut the workpiece. In addition, the tool electrode adopting the micro-rod structure has two benefits, the first is that the surface area of the micro-rod electrode is small, the micro-rod electrode is easy to form gas film wrapping, and electrolyte plasma can be excited under the processing voltage of tens of volts. And secondly, the micro-rod electrode can realize the processing with smaller size, and the carving processing of any shape of the workpiece can be realized by utilizing the motion control of the micro-rod electrode. By utilizing the processing method of the embodiment of the invention, namely the electric field shielding effect of the air film and the disturbance effect of the air bubbles on the flow field, high-locality precision processing can be realized, and the smooth surface of the processed workpiece is kept.
Drawings
FIG. 1 is a schematic view of the processing of an apparatus for carrying out the plasma-assisted electrolytic processing in example 1.
FIG. 2 is a schematic diagram of comparative analysis of the plasma-assisted electrochemical machining method provided in example 2 with conventional electrochemical machining;
FIG. 3 is a schematic view of an experimental method for processing a microstructure according to example 2;
FIG. 4 is a graph showing waveforms of voltage and current applied during the electrolytic processing in example 2;
FIG. 5 is a topographical view of the micropores processed in example 2;
FIG. 6 is a topographical view of the micro grooves machined in example 2;
FIG. 7 is a graph of the microstructure size and area of influence for plasma assisted electrochemical machining and conventional electrochemical machining in example 2;
FIG. 8 is a schematic view of the microstructure profile of plasma assisted electrochemical machining and conventional electrochemical machining in example 2;
FIG. 9 is a photograph showing the plasma-assisted electrolytic processing of the tool electrode and the workpiece at a large pitch in example 3.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly defined, terms such as connected should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.
Example 1
Referring to fig. 1, fig. 1 is a schematic processing diagram of an implementation device for implementing a plasma-assisted electrolytic processing method, the implementation device includes a power supply system and a working fluid system, the power supply system includes a function generator 1, a dc power supply 2, an oscilloscope 3 and a power supply probe 4 which are electrically connected, an anode of the dc power supply 2 is connected with a workpiece 5, a cathode of the dc power supply 2 is connected with a tool electrode 7 through an electrode chuck 6, the tool electrode 7 is in a rod-shaped structure, the working fluid system includes an electrolytic tank 8 and an electrolyte 9, the electrolytic tank 8 is used for containing the electrolyte 9, in a working state, the workpiece 5 and the tool electrode 7 are immersed in the electrolyte 9, and the power supply system is switched on to control an applied voltage to be more than 50V.
In order to facilitate the adjustment of the machining gap between the tool electrode 7 and the workpiece 5, the device for carrying out the plasma-assisted electrochemical machining method in the preferred embodiment further comprises a feed adjustment device, such as a machine tool motion table, by means of which the tool electrode can be moved or interlocked in a single axis or multiple axes of XYZ, so as to achieve the purpose of drilling, milling grooves, machining cavities and curved surfaces.
The dc power supply 2 may be a constant voltage power supply, a constant current power supply or a pulse dc power supply, and the specific applied voltage is determined by the immersion area of the tool electrode in the electrolyte, and the larger the contact area between the tool electrode and the electrolyte, the larger the applied voltage. In the working state, the surface of the tool electrode is subjected to a reduction reaction, and the reaction equation is as follows:
2H2O+2e-→H2↑+2OH-
the workpiece is oxidized, and the reaction equation is as follows:
M-ne-→Mn+
4OH--4e-→2H2O+O2↑
the tool electrode is quickly surrounded by hydrogen bubbles due to the application of high voltage, the resistance between the two electrodes is quickly increased, so that a large amount of joule heat is generated, a water vapor film is further formed around the tool electrode, the current circulation is blocked, the generated water vapor film has high resistivity, so that the side wall insulation effect is realized on the side edge of the tool electrode, and when the electric field intensity between the two electrodes reaches 106V·cm-1In the above, plasma breakdown is formed, and the formed plasma can keep the processed workpiece smooth and promote the electrolytic processing effect. In addition, since the tool electrode is connected with the negative electrode and reduction reaction occurs, chemical dissolution of materials cannot occur, and meanwhile, plasma is formed around the tool electrode, so that the damage to the tool electrode and a workpiece is small by the processing method of the embodiment of the invention.
Example 2
The embodiment provides a plasma-assisted electrolytic machining method, which comprises the following steps:
(1) providing a direct current power supply, connecting the positive pole of the direct current power supply with a workpiece, connecting the negative pole of the direct current power supply with a tool electrode, wherein the tool electrode is of a rod-shaped structure;
(2) placing the workpiece and the tool electrode in an electrolyte;
(3) and (4) switching on a direct current power supply, wherein the voltage applied by the direct current power supply is more than 50V.
For a clear understanding of the features and advantages of the plasma-assisted electrochemical machining method according to the present invention, referring to fig. 2, fig. 2 is a schematic diagram of the plasma-assisted electrochemical machining method according to the embodiment of the present invention, wherein (a) shows a schematic diagram of the plasma-assisted electrochemical machining method according to the embodiment of the present invention, and (b) shows a schematic diagram of the conventional electrochemical machining, and the block diagram of the tool electrode in the diagram does not represent a shape, but merely indicates the effect. As shown in fig. 2 (a), the plasma-assisted electrochemical machining method according to the embodiment of the present invention can form a gas film and plasma on the surface of the tool electrode, and since the front end of the tool electrode is a current density concentration region, the plasma is preferentially formed and acts more intensely at the front end of the tool electrode. On the other hand, the bubbles move upwards under the action of buoyancy, so that a high-resistivity gas film is formed on the side wall of the tool electrode, the side wall of the tool electrode is insulated, and the electrolytic machining precision is improved. Bubbles and plasma which are generated violently in the whole processing process form a violent disturbed flow field in a processing gap, so that the mass transfer strengthening effect is achieved, the discharge of electrolytic products is promoted, the electrolytic processing surface quality is improved, and the auxiliary action of the plasma plays an important role in improving the traditional electrolytic processing precision, efficiency and surface quality. As shown in fig. 2 (b), in the conventional electrochemical machining process, due to the existence of stray current, a "bell mouth" is easily formed on the workpiece, the machining precision is difficult to guarantee, and due to the small machining gap (usually 10 μm-1mm), the electrolyte is difficult to flow into the machining area quickly, so that the accumulation of electrolytic products is easily caused, and the machining efficiency, the machining stability and the quality of the machined surface are affected.
Experiments prove that in the embodiment, the implementation device in fig. 1 is used for processing the microstructure on the surface of the workpiece, the microstructure comprises micropores and microgrooves, the schematic diagram of the microstructure processing experimental method is shown in fig. 3, the initial gap between the workpiece and the processing electrode is 30 μm, and a punching mode is adopted during processing the micropores, specifically, the tool electrode is static and does not feed, and the initial processing gap is kept unchanged. When the micro-groove is machined, a groove milling mode is adopted, and the specific mode is that the tool electrode carries out reciprocating scanning, the scanning speed is 2mm/s, and the cycle number is 10 times. In contrast, the experimental conditions for the conventional electrochemical machining of the microstructure were changed only by the voltage, and the specific experimental conditions are shown in table 1. TABLE 1 Experimental conditions for plasma-assisted electrochemical machining and conventional electrochemical machining of microstructures in this example
In this embodiment, the electrolyte solution is 20% NaNO by immersion liquid supply3Solution, practiceIn the electrolytic processing process, other liquid supply modes such as pumping by a water pump and external circulation through a filter element are also suitable, and in addition, the electrolyte can also be one or more mixed electrolytes of NaOH solution, KOH solution and other inorganic salt solutions such as NaCl solution. The power supply used in this example was a pulse dc power supply, and the voltage and current waveform applied during the electrolytic machining was as shown in fig. 4, and when 50V was applied, the current instantaneously reached the maximum value (about 1-3A), and immediately after that, the current was rapidly decreased due to the formation of the gas film on the surface of the tool electrode, which obstructed the current flow, and finally was maintained at about 100 mA. In the actual electrolytic machining process, the pulse current, the constant voltage or the constant current waveform is also applicable.
The shapes of the micropores formed by processing under the above experimental conditions are shown in fig. 5, wherein (a) and (a ') represent the shapes of the micropores after plasma-assisted electrochemical machining (PA-ECM), and (b) and (b') represent the shapes of the micropores after conventional electrochemical machining (ECM), and it can be seen from the figure that the diameter of the orifice and the diameter of the affected area of the plasma-assisted electrochemical machining are significantly smaller than those of the conventional electrochemical machining, indicating that the processing precision of the method using plasma-assisted electrochemical machining is significantly improved, the localization of the plasma-assisted electrochemical machining is better, and the result is mainly because the surface of the tool electrode is covered with a gas film, which plays a role in insulating the side wall. Furthermore, comparing (a ') and (b') in fig. 5, it can be seen that the bottom surface of the hole processed by plasma-assisted electrolysis is a smooth surface, whereas the bottom surface of the hole processed by conventional electrolysis is a rough surface, which indicates that the plasma generated during plasma-assisted electrolysis mainly plays a role in promoting electrolysis, and the excited flow field formed by plasma-assisted electrolysis promotes the discharge of electrolysis products, so that the processed surface is smooth and no electrolysis products are accumulated.
The micro-groove processed and formed under the experimental conditions is shown in fig. 6, wherein (a) shows the micro-groove shape after plasma-assisted electrochemical machining (PA-ECM), and (b) shows the micro-hole shape after traditional electrochemical machining (ECM), and in the micro-groove processing, the groove width and the processing influence area of the plasma-assisted electrochemical machining are smaller, so that the advantages of the plasma-assisted electrochemical machining in the aspect of electrolytic milling are proved, and the micro-structure can be processed with higher precision and higher quality.
FIG. 7 shows the sizes and the range of the affected zones of the micro-structure of the plasma-assisted electrochemical machining and the conventional electrochemical machining of the present embodiment, wherein (a) shows the micro-hole machining and (b) shows the micro-groove machining. It can be seen that the PA-ECM processed micropores had a diameter of 375 μm and an affected zone of 1350 μm when processed as micropores, while the conventional ECM processed micropores had a diameter of 462 μm and an affected zone of 2810 μm. On the other hand, in the microgroove processing, the width of the microgrooves of PA-ECM processing is 352 μm and the width of the affected zone is 1240 μm, while the width of the microgrooves of conventional ECM processing is 406 μm and the width of the affected zone is 2280 μm. FIG. 8 shows the profiles of the micro-structure of the plasma-assisted electrochemical machining and the conventional electrochemical machining of the present embodiment, wherein (a) shows the micro-hole machining and (b) shows the micro-groove machining. As can be seen from fig. 7 and 8, the microstructure depth of the plasma-assisted electrochemical machining is shallower than that of the conventional electrochemical machining, mainly because the tool electrode can erode the workpiece only in a small range under the action of the bubbles and the plasma, the machining gap is reduced, and the machining localization is improved.
Example 3
In the plasma-assisted electrochemical machining method provided by the present application, the electrode gap between the tool electrode and the workpiece can still form plasma when the distance is large, the machining experimental conditions adopted in this example are the same as those of example 2, except that the electrode gap is 30mm, the tool electrode is a micro-rod with a diameter of 300 μm, and a picture of plasma-assisted electrochemical machining performed at a large distance between the tool electrode and the workpiece is shown in fig. 9. When the voltage of 50V is switched on, the tool electrode is instantly surrounded by bubbles, so that the resistance of the tool electrode interface is increased, the Joule heat is increased, a water vapor film is formed, and finally plasma breakdown and plasma wrapping are formed when the electric field strength reaches a threshold value. According to the plasma-assisted electrolytic machining method, the process of generating bubbles on the surface of the tool electrode in an inducing mode is insensitive to the distance between the two electrodes, and the bubbles can be still generated violently when the distance between the two electrodes is more than 30mm, so that plasma breakdown and plasma wrapping of the tool electrode can be formed smoothly. Fig. 9 presents the result of the tool electrode being enveloped by a gas film, wherein the workpiece is further away from the tool electrode and therefore does not appear in the field of view.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. A plasma-assisted electrolytic machining method is characterized by comprising the following steps:
providing a direct current power supply, wherein the positive pole of the direct current power supply is connected with a workpiece, the negative pole of the direct current power supply is connected with a tool electrode, and the tool electrode is of a rod-shaped structure;
placing the workpiece and the tool electrode in an electrolyte;
and the direct current power supply is switched on, and the voltage applied by the direct current power supply is more than 50V.
2. The plasma-assisted electrolytic processing method according to claim 1, wherein the direct-current power supply is a constant-voltage power supply, a constant-current power supply, or a pulsed direct-current power supply.
3. The plasma-assisted electrolytic processing method according to claim 1, characterized in that a gap between the workpiece and the tool electrode is 5 μm to 40 mm.
4. The plasma-assisted electrolytic processing method according to claim 1, wherein the tool electrode is excited to generate plasma during processing, and the tool electrode is closely wrapped by the plasma.
5. The plasma-assisted electrolytic processing method according to claim 4, wherein the plasma is excited by an electrochemical reaction, and a shape of a plasma layer formed by the plasma is the same as a shape of the tool electrode.
6. The plasma-assisted electrolytic processing method according to claim 4, wherein the plasma forms a local high temperature during the excitation.
7. The plasma-assisted electrolytic processing method according to any one of claims 1 to 6, wherein the electrolyte includes at least one of a NaOH solution, a KOH solution, and an inorganic salt solution.
8. An apparatus for carrying out the plasma-assisted electrolytic processing method according to any one of claims 1 to 7, comprising:
the power supply system comprises a direct current power supply, wherein the positive pole of the direct current power supply is used for connecting a workpiece, the negative pole of the direct current power supply is connected with a tool electrode, and the tool electrode is of a rod-shaped structure;
and the working solution system comprises an electrolytic tank, the electrolytic tank is used for containing electrolyte, and the workpiece and the tool electrode are immersed in the electrolyte in a working state.
9. The apparatus of claim 8, wherein the power supply system comprises a DC power supply, a function generator, an oscilloscope, and a power supply probe electrically connected to each other.
10. The apparatus of claim 8, further comprising a feed adjustment device coupled to the tool electrode for adjusting the movement of the tool electrode.
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| CN112809111A (en) * | 2021-01-20 | 2021-05-18 | 南方科技大学 | Ultrasonic-plasma electrolytic combined machining method and machining device for workpiece |
| CN112809111B (en) * | 2021-01-20 | 2022-05-20 | 南方科技大学 | Ultrasonic-plasma electrolytic combined machining method and machining device for workpiece |
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Application publication date: 20201023 |