Micro-hole electrochemical discharge machining integrated electrode

Abstract

The utility model relates to special processing technical field, concretely relates to a kind of integrated electrode of micro-hole electrospark electrochemical compound processing, comprising: hollow tube electrode, is equipped with first liquid flushing channel;Liquid supply electrode, fixedly arranged in the outside of the hollow tube electrode, is equipped with second liquid flushing channel and third liquid flushing channel, the output end of the second liquid flushing channel and the third liquid flushing channel are all inclined towards the hollow tube electrode;Along the radial direction of the hollow tube electrode, the output end of the third liquid flushing channel is on the side of the output end of the second liquid flushing channel away from the hollow tube electrode;Wherein, the first liquid flushing channel and the second liquid flushing channel are used to transport electrolyte, and the third liquid flushing channel is used to transport deionized water.The integrated electrode in the application is based on the synergistic cooperation of multiple liquid flushing channels, to improve the machining quality and machining precision of workpiece.

Description

Technical Field

[0001] This utility model relates to the field of special processing technology, specifically to an integrated electrode for micro-hole electro-discharge electrochemical composite processing. Background Technology

[0002] With the increasing demand for high-precision components in the aerospace industry, the importance of micro-hole machining technology is becoming increasingly prominent. Taking aero-engines as an example, the development trend of high thrust-to-weight ratio and high speed places stringent requirements on the high temperature resistance and fatigue resistance of turbine blades. As a core hot-end component, turbine blades need to withstand ultra-high temperature combustion gases and complex alternating loads for a long time, and their reliability directly determines the safety of the entire engine.

[0003] Current turbine blades employ a combination of high-temperature alloys and film cooling technology: high-pressure cooling airflow is introduced into the hollow blade cavity, forming a cooling film through numerous tiny film pores (tens of thousands of pores are required for a single engine). This film isolates the high-temperature combustion gases and reduces the impact of heat radiation on the blade walls. Next-generation engines demand even higher cooling efficiency and longer service life. The film pores must not only meet precise geometric requirements but also ensure the absence of defects such as remelted layers on the pore walls. These machining quality requirements directly impact the engine's thrust-to-weight ratio, making micro-hole machining technology a key technological bottleneck in aero-engine manufacturing.

[0004] Electrical discharge machining (EDM) technology uses spark discharge to melt and erode materials, and has advantages such as high efficiency, ability to process complex hole shapes, and low cost. However, when processing tiny film holes with this technology, the instantaneous high temperature will generate a remelted layer containing pores and microcracks, which will significantly reduce the fatigue life of the workpiece.

[0005] To effectively reduce or even completely remove the remelted layer, research institutions both domestically and internationally are exploring new processes and technologies, and an electro-discharge-electrochemical composite machining technology has gradually emerged. This technology simultaneously achieves rapid spark discharge forming and electrochemical anodic dissolution by introducing a low-conductivity working fluid into the tube electrode: spark discharge removes the material, while electrochemical dissolution effectively removes the remelted layer. This composite process combines the advantages of both methods, ensuring processing efficiency while obtaining high-quality hole walls free of remelted layers, making it an effective solution to the remelted layer problem.

[0006] However, in the electro-discharge-electrochemical composite machining process, as long as a working fluid with certain conductivity exists between the anode and cathode, anodic electrochemical dissolution will occur. This often leads to unnecessary material removal, especially causing stray corrosion in non-machined areas. This reduces the quality of the non-machined areas on the micro-hole surface, ultimately affecting the workpiece's service life and performance. Furthermore, electrochemical dissolution requires the anode and cathode to be filled with electrolyte. When the micro-hole is penetrated by the tubular electrode, the back pressure at the micro-hole outlet drops sharply and disappears. Even if the tubular electrode continues to output working fluid, this fluid is insufficient to act on the sidewall at the micro-hole outlet, resulting in a remelted layer residue on the sidewall.

[0007] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0008] The purpose of this invention is to provide an integrated electrode for micro-pore electro-discharge electrochemical composite processing.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A microporous electro-spark electrochemical composite fabrication integrated electrode, comprising:

[0011] The hollow tube electrode is equipped with a first flushing channel;

[0012] A liquid supply electrode is fixedly disposed on the outside of the hollow tube electrode, and is provided with a second liquid flushing channel and a third liquid flushing channel. The output ends of the second liquid flushing channel and the third liquid flushing channel are inclined towards the hollow tube electrode. Along the radial direction of the hollow tube electrode, the output end of the third liquid flushing channel is located on the side of the output end of the second liquid flushing channel away from the hollow tube electrode.

[0013] The first flushing channel and the second flushing channel are used to transport electrolyte, and the third flushing channel is used to transport deionized water.

[0014] The operation of an integrated electrode may include the following steps:

[0015] Step 1: Place a hollow tube electrode close to the surface of the workpiece, and form a first gap region between the end face of the hollow tube electrode and the surface of the workpiece.

[0016] Step 2: A first working fluid (i.e., electrolyte) with conductivity A is delivered to the first gap region through the first flushing channel, and deionized water with conductivity B is delivered to the peripheral region of the first gap region through the third flushing channel, where A is greater than B.

[0017] Step 3: Control the servo feed of the hollow tube electrode (the following description is based on servo feed along the thickness direction of the workpiece) to perform hole-making on the workpiece, during which the first working fluid and deionized water are continuously supplied.

[0018] Step 4: When the hollow tube electrode penetrates the workpiece to process a forming hole on the workpiece, pause the servo feed of the hollow tube electrode and stop the delivery of the first working fluid, while continuously delivering deionized water during the process.

[0019] Step 5: A second gap region is formed between the part of the hollow tube electrode that penetrates into the forming hole and the hole wall. A second working fluid with conductivity C, where C is greater than B, is delivered to the second gap region through the second flushing channel.

[0020] Step 6: After the second working fluid flows out of the forming hole along the servo feed direction, resume the servo feed of the hollow tube electrode to expand the outlet size of the forming hole.

[0021] For ease of explanation and understanding, this application will describe the process using the steps outlined above, and will use a hollow tube electrode with downward servo feed as an example, in which case the workpiece has an upper surface and a lower surface. This application will use the machining of film cooling holes in turbine blades as an example for explanation, but is not limited to this.

[0022] During the composite processing, deionized water can be delivered through the third flushing channel. The deionized water is mixed with the electrolyte to form a water film with low conductivity in the non-processed area (surrounding the first gap area) on the upper surface of the workpiece. This reduces stray current density and suppresses stray corrosion in the non-processed area on the upper surface of the workpiece.

[0023] It should be noted that in step four, although the hollow tube electrode penetrates the workpiece, the outlet of the forming hole (on the lower surface of the workpiece) is relatively small (much smaller than its inlet). Therefore, the outlet needs to be enlarged subsequently. Considering that electrochemical dissolution requires the anode and cathode to be filled with electrolyte, and that the back pressure at the outlet of the forming hole drops sharply and disappears when the workpiece is penetrated, even if the hollow tube electrode can continuously output the first working fluid, this first working fluid is difficult to act on the sidewall at the outlet of the forming hole (especially the entire area of ​​the sidewall), resulting in a remelted layer residue easily appearing on the sidewall at the outlet of the forming hole.

[0024] The second working fluid is delivered to the second gap region through the second flushing channel. The second working fluid replaces the first working fluid for electrochemical dissolution. Since the second working fluid is input through the opening of the second gap region, it can fill the gap between the outlet of the forming hole and the hollow tube electrode, thus avoiding the situation where a remelted layer residue easily appears on the sidewall of the outlet of the forming hole.

[0025] In summary, the integrated electrode in this application, based on the synergistic cooperation of multiple flushing channels, not only achieves electro-discharge electrochemical composite machining of the workpiece, but also solves the problem of stray corrosion in the non-machined areas of the workpiece surface, and avoids the remelting layer residue on the sidewall of the outlet of the forming hole on the workpiece, thereby improving the machining quality and accuracy of the workpiece.

[0026] A further technical solution is that the outer diameter of the hollow tube electrode is the same as the inner diameter of the liquid supply electrode, so as to improve the structural compactness and structural strength of the integrated electrode.

[0027] Hollow tube electrodes and liquid supply electrodes can be formed in one step using additive manufacturing technology.

[0028] The liquid supply electrode can be made of non-metallic insulating materials, such as photosensitive resin, ceramic materials, PLA (polylactic acid), ABS (acrylonitrile-butadiene-styrene), and PC engineering plastics.

[0029] In a further technical solution, both the hollow tube electrode and the first flushing channel extend along the length direction of the integrated electrode;

[0030] The second flushing channel includes a first inlet section, a first delivery section, and a first outlet section connected in sequence; the first delivery section extends along the length of the integrated electrode; the first outlet section is inclined toward the hollow tube electrode.

[0031] The third flushing channel includes a second inlet section, a second delivery section and a second outlet section connected in sequence; the second delivery section extends along the length of the integrated electrode; the second outlet section is inclined toward the hollow tube electrode.

[0032] Taking the second flushing channel as an example, the third flushing channel is explained here:

[0033] The first infusion section extends along the length of the integrated electrode, making it easy to process and shape, and ensuring the flow rate of the second working fluid within it. This allows for a rapid and stable supply of the second working fluid, ensuring the continuous and stable progress of the relevant electrochemical dissolution process. The first infusion section can be annular in shape.

[0034] The first inlet section facilitates the input of the second working fluid into the first delivery section; the first inlet section can be annular.

[0035] The first liquid outlet section is tilted toward the hollow tube electrode (the tilt angle is not limited), which facilitates the entry of the second working fluid into the second gap area.

[0036] The cross-sectional shape of the second flushing channel can be referenced in the appendix. Figure 1 .

[0037] In a further technical solution, the first liquid outlet section has a first wall and a second wall disposed from the inside out; the first wall has a first side close to the liquid outlet of the first liquid outlet section, and the second wall has a second side close to the liquid outlet of the first liquid outlet section; in the length direction of the integrated electrode, the second side is located on the side of the first side close to the liquid outlet of the first flushing channel.

[0038] This section can be understood as follows: the first wall encloses and forms a first frustum structure, and the second wall encloses and forms a second frustum structure. In the direction of fluid flow within the first flushing channel, the end face of the second frustum structure protrudes relative to the end face of the first frustum structure. The first and second sides can be understood as annular edges.

[0039] This section can also be understood as follows: the second wall encloses and forms a hollow frustum structure, and the small end of the hollow frustum structure has an opening, which is the actual liquid outlet of the first liquid outlet section.

[0040] Reference Appendix Figure 3 The following explanation assumes that the first and second sides are arranged side-by-side along the length of the integrated electrode. When the first wall can no longer guide the second working fluid, the second wall can still guide the second working fluid to facilitate its entry into the second gap region. When the second working fluid passes the first side, it is restricted by the second wall, and the space for the second working fluid to move radially in the integrated electrode gradually decreases. While ensuring the supply of the second working fluid, the second working fluid is guided to flow as close as possible to the outer wall of the hollow tube electrode, especially since the first wall can no longer prevent the second working fluid from adhering to the hollow tube electrode. If the first and second sides are arranged side-by-side in the radial direction of the integrated electrode, the second working fluid can pass over both the first and second sides simultaneously, making it easy for more of the second working fluid to fail to adhere to (or approach) the hollow tube electrode to enter the second gap region.

[0041] A further technical solution is that the end face of the second liquid outlet section near the liquid outlet of the first flushing channel is a plane, and the normal of this plane is parallel to the length direction of the first flushing channel. This arrangement reduces the difficulty of processing the second liquid outlet section and allows for a larger outflow of deionized water to ensure effective suppression of stray corrosion on the surface of the workpiece.

[0042] A further technical solution involves sequentially and intermittently arranging the discharge end face of the second discharge section, the discharge end face of the first discharge section, and the discharge end face of the first flushing channel along the fluid flow direction within the first flushing channel.

[0043] Along the fluid flow direction in the first flushing channel, the discharge end face of the first discharge section and the discharge end face of the first flushing channel are arranged sequentially and at intervals to avoid the first discharge section from easily touching the workpiece and affecting the servo feed process.

[0044] Along the fluid flow direction in the first flushing channel, the discharge end face of the second discharge section is arranged sequentially and at intervals with the discharge end face of the first discharge section to avoid unnecessary structural arrangements, such as avoiding setting the length dimension of the second discharge section within an unnecessary range, reducing structural costs, and also preventing the second discharge section from easily contacting the workpiece.

[0045] It is understandable that, along the fluid flow direction within the first flushing channel, the discharge end face of the second discharge section, the discharge end face of the first discharge section, and the discharge end face of the first flushing channel are not arranged side by side.

[0046] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0047] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0048] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0049] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing this case.

[0050] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0051] The working principle and advantages of this utility model are as follows:

[0052] The operation of an integrated electrode may include the following steps:

[0053] Step 1: Place a hollow tube electrode close to the surface of the workpiece, and form a first gap region between the end face of the hollow tube electrode and the surface of the workpiece.

[0054] Step 2: A first working fluid (i.e., electrolyte) with conductivity A is delivered to the first gap region through the first flushing channel, and deionized water with conductivity B is delivered to the peripheral region of the first gap region through the third flushing channel, where A is greater than B.

[0055] Step 3: Control the servo feed of the hollow tube electrode (the following description is based on servo feed along the thickness direction of the workpiece) to perform hole-making on the workpiece, during which the first working fluid and deionized water are continuously supplied.

[0056] Step 4: When the hollow tube electrode penetrates the workpiece to process a forming hole on the workpiece, pause the servo feed of the hollow tube electrode and stop the delivery of the first working fluid, while continuously delivering deionized water during the process.

[0057] Step 5: A second gap region is formed between the part of the hollow tube electrode that penetrates into the forming hole and the hole wall. A second working fluid with conductivity C, where C is greater than B, is delivered to the second gap region through the second flushing channel.

[0058] Step 6: After the second working fluid flows out of the forming hole along the servo feed direction, resume the servo feed of the hollow tube electrode to expand the outlet size of the forming hole.

[0059] For ease of explanation and understanding, this application will describe the process using the steps described above, and will use a hollow tube electrode being fed downwards by a servo feed, in which case the workpiece has an upper surface and a lower surface.

[0060] During the composite processing, deionized water can be delivered through the third flushing channel. The deionized water is mixed with the electrolyte to form a water film with low conductivity in the non-processed area (surrounding the first gap area) on the upper surface of the workpiece. This reduces stray current density and suppresses stray corrosion in the non-processed area on the upper surface of the workpiece.

[0061] It should be noted that in step four, although the hollow tube electrode penetrates the workpiece, the outlet of the forming hole (on the lower surface of the workpiece) is relatively small (much smaller than its inlet). Therefore, the outlet needs to be enlarged subsequently. Considering that electrochemical dissolution requires the anode and cathode to be filled with electrolyte, and that the back pressure at the outlet of the forming hole drops sharply and disappears when the workpiece is penetrated, even if the hollow tube electrode can continuously output the first working fluid, this first working fluid is difficult to act on the sidewall at the outlet of the forming hole (especially the entire area of ​​the sidewall), resulting in a remelted layer residue easily appearing on the sidewall at the outlet of the forming hole.

[0062] The second working fluid is delivered to the second gap region through the second flushing channel. The second working fluid replaces the first working fluid for electrochemical dissolution. Since the second working fluid is input through the opening of the second gap region, it can fill the gap between the outlet of the forming hole and the hollow tube electrode, thus avoiding the situation where a remelted layer residue easily appears on the sidewall of the outlet of the forming hole.

[0063] Existing conventional electrodes only include a first flushing channel. The integrated electrode in this application adds a second flushing channel and a third flushing channel, which can deliver deionized water for neutralization while delivering electrolyte, and can also deliver electrolyte to the gap between the electrode and the orifice wall.

[0064] In summary, the integrated electrode in this application, based on the synergistic cooperation of multiple flushing channels, not only achieves electro-discharge electrochemical composite machining of the workpiece, but also solves the problem of stray corrosion in the non-machined areas of the workpiece surface, and avoids the remelting layer residue on the sidewall of the outlet of the forming hole on the workpiece, thereby improving the machining quality and accuracy of the workpiece. Attached Figure Description

[0065] Appendix Figure 1 This is a cross-sectional view of the overall structure of the integrated electrode used in the machining of the workpiece according to an embodiment of this utility model;

[0066] Appendix Figure 2 This is one of the partial structural cross-sectional views of the integrated electrode used in the machining of the workpiece according to an embodiment of this utility model;

[0067] Appendix Figure 3 This is a second partial structural cross-sectional view of the integrated electrode used in the machining of the workpiece according to an embodiment of this utility model;

[0068] Appendix Figure 4 This is the third partial structural cross-sectional view of the integrated electrode used in the machining of the workpiece according to an embodiment of this utility model.

[0069] In the attached diagrams: 1. Hollow tube electrode; 11. First flushing channel; 2. Supply electrode; 21. Second flushing channel; 211. First inlet section; 212. First delivery section; 213. First outlet section; 2131. First wall; 2132. Second wall; 22. Third flushing channel; 221. Second inlet section; 222. Second delivery section; 223. Second outlet section; 3. Workpiece; 4. First gap region; 5. Second gap region; 6. First side; 7. Second side. Detailed Implementation

[0070] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0071] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0072] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0073] See appendix Figure 1 - Appendix Figure 4 A microporous electro-spark electrochemical composite fabrication integrated electrode, comprising:

[0074] Hollow tube electrode 1 is provided with a first flushing channel 11;

[0075] The liquid supply electrode 2 is fixedly disposed on the outside of the hollow tube electrode 1, and is provided with a second flushing channel 21 and a third flushing channel 22. The output ends of the second flushing channel 21 and the third flushing channel 22 are both inclined towards the hollow tube electrode 1. Along the radial direction of the hollow tube electrode 1, the output end of the third flushing channel 22 is located on the side of the output end of the second flushing channel 21 away from the hollow tube electrode 1.

[0076] The first flushing channel 11 and the second flushing channel 21 are used to transport electrolyte, and the third flushing channel 22 is used to transport deionized water.

[0077] The operation of an integrated electrode may include the following steps:

[0078] Step 1: A hollow tube electrode 1 is brought close to the surface of the workpiece 3, and a first gap region 4 is formed between the end face of the hollow tube electrode 1 and the surface of the workpiece 3.

[0079] Step 2: A first working fluid (i.e., electrolyte) with conductivity A is delivered to the first gap region 4 through the first flushing channel 11, and deionized water with conductivity B is delivered to the peripheral region of the first gap region 4 through the third flushing channel 22, where A is greater than B.

[0080] Step 3: Control the servo feed of the hollow tube electrode 1 (the following description is based on servo feed along the thickness direction of workpiece 3) to perform hole drilling on workpiece 3, during which the first working fluid and deionized water are continuously supplied.

[0081] Step 4: When the hollow tube electrode 1 penetrates the workpiece 3 to process a forming hole on the workpiece 3, the servo feed of the hollow tube electrode 1 is paused and the first working fluid is stopped, while deionized water is continuously supplied during the process.

[0082] Step 5: The portion of the hollow tube electrode 1 that penetrates into the forming hole forms a second gap region 5 between itself and the hole wall. A second working fluid with a conductivity of C, greater than B, is supplied to the second gap region 5 through the second flushing channel 21.

[0083] Step 6: After the second working fluid flows out of the forming hole along the servo feed direction, resume the servo feed of the hollow tube electrode 1 to expand the outlet size of the forming hole.

[0084] For ease of explanation and understanding, this embodiment will be described using the steps described above, and will be illustrated by the downward servo feed of the hollow tube electrode 1, at which point the workpiece 3 has an upper surface and a lower surface. This embodiment will be illustrated by machining the film cooling holes of a turbine blade, but is not limited to this.

[0085] During the composite processing, deionized water can be delivered through the third flushing channel 22. The deionized water is mixed with the electrolyte to form a water film with low conductivity in the non-processed area (surrounding the first gap area 4) on the upper surface of the workpiece 3. This reduces the stray current density and suppresses stray corrosion in the non-processed area on the upper surface of the workpiece 3.

[0086] It should be noted that in step four, although the hollow tube electrode 1 penetrates the workpiece 3, the outlet of the forming hole (on the lower surface of the workpiece 3) is relatively small (much smaller than its inlet). Therefore, the outlet needs to be enlarged subsequently. Considering that electrochemical dissolution requires the anode and cathode to be filled with electrolyte, and that the back pressure at the outlet of the forming hole drops sharply and disappears when the workpiece 3 is penetrated, even if the hollow tube electrode 1 can continuously output the first working fluid, this first working fluid is difficult to act on the sidewall at the outlet of the forming hole (especially the entire area of ​​the sidewall), which makes it easy for a remelted layer to remain on the sidewall at the outlet of the forming hole.

[0087] The second working fluid is supplied to the second gap region 5 through the second flushing channel 21. The second working fluid replaces the first working fluid for electrochemical dissolution. Since the second working fluid is input through the opening of the second gap region 5, it can fill the gap between the outlet of the forming hole and the hollow tube electrode 1, thus avoiding the situation where a remelted layer residue easily appears on the side wall of the outlet of the forming hole.

[0088] Existing conventional electrodes only include a first flushing channel 11. The integrated electrode in this embodiment adds a second flushing channel 21 and a third flushing channel 22, which can deliver deionized water for neutralization while delivering electrolyte, and can also deliver electrolyte to the gap between the electrode and the orifice wall.

[0089] In summary, the integrated electrode in this embodiment, based on the synergistic cooperation of multiple flushing channels, not only achieves electro-discharge electrochemical composite machining of workpiece 3, but also solves the problem of stray corrosion in the non-machined areas of workpiece 3, and avoids the remelting layer residue on the sidewall of the outlet of the forming hole on workpiece 3, thereby improving the machining quality and accuracy of workpiece 3.

[0090] See appendix Figure 1 In this embodiment, the outer diameter of the hollow tube electrode 1 is the same as the inner diameter of the liquid supply electrode 2, so as to improve the structural compactness and structural strength of the integrated electrode.

[0091] Hollow tube electrode 1 and liquid supply electrode 2 can be formed in one step using additive manufacturing technology.

[0092] The liquid supply electrode 2 can be made of non-metallic insulating materials, such as photosensitive resin, ceramic materials, PLA (polylactic acid), ABS (acrylonitrile-butadiene-styrene), and PC engineering plastics.

[0093] See appendix Figure 1 In this embodiment, both the hollow tube electrode 1 and the first flushing channel 11 extend along the length direction of the integrated electrode.

[0094] The second flushing channel 21 includes a first inlet section 211, a first delivery section 212, and a first outlet section 213 connected in sequence; the first delivery section 212 extends along the length direction of the integrated electrode; the first outlet section 213 is inclined toward the hollow tube electrode 1.

[0095] The third flushing channel 22 includes a second inlet section 221, a second delivery section 222 and a second outlet section 223 connected in sequence; the second delivery section 222 extends along the length of the integrated electrode; the second outlet section 223 is inclined toward the hollow tube electrode 1.

[0096] Taking the second flushing channel 21 as an example, the third flushing channel 22 is explained here:

[0097] The first infusion section 212 extends along the length of the integrated electrode, making it easy to process and shape, and ensuring the flow rate of the second working fluid within it. This enables a rapid and stable supply of the second working fluid, ensuring the continuous and stable progress of the relevant electrochemical dissolution process. The first infusion section 212 can be annular.

[0098] The first inlet section 211 facilitates the input of the second working fluid into the first delivery section 212; the first inlet section 211 can be annular.

[0099] The first liquid outlet section 213 is inclined toward the hollow tube electrode 1 (the inclination angle is not limited), which can facilitate the entry of the second working fluid into the second gap region 5.

[0100] The cross-sectional shape of the second flushing channel 21 can be referenced in the appendix. Figure 1 .

[0101] See appendix Figure 2In this embodiment, the first liquid outlet section 213 has a first wall 2131 and a second wall 2132 disposed from the inside out; the first wall 2131 has a first side 6 near the liquid outlet of the first liquid outlet section 213, and the second wall 2132 has a second side 7 near the liquid outlet of the first liquid outlet section 213; in the length direction of the integrated electrode, the second side 7 is located on the side of the first side 6 near the liquid outlet of the first flushing channel 11.

[0102] This section can be understood as follows: the first wall 2131 encloses and forms a first frustum structure, and the second wall 2132 encloses and forms a second frustum structure. In the direction of fluid flow within the first flushing channel 11, the end face of the second frustum structure protrudes relative to the end face of the first frustum structure. The first side 6 and the second side 7 can be understood as annular edges.

[0103] This section can also be understood as follows: The second wall 2132 encloses and forms a hollow frustum structure, and the small end of the hollow frustum structure has an opening, which is the actual liquid outlet of the first liquid outlet section 213.

[0104] Reference Appendix Figure 2 The following description assumes that the first side 6 and the second side 7 are arranged side by side along the length of the integrated electrode. When the first wall 2131 can no longer guide the second working fluid, the second wall 2132 can still guide the second working fluid so that the second working fluid can enter the second gap region 5. When the second working fluid passes the first side 6, it is restricted by the second wall 2132, and the space for the second working fluid to move in the radial direction of the integrated electrode gradually decreases. While ensuring the supply of the second working fluid, the second working fluid is guided to flow as close as possible to the outer wall of the hollow tube electrode 1. In particular, at this time, the first wall 2131 can no longer prevent the second working fluid from adhering to the hollow tube electrode 1. If the first side 6 and the second side 7 are arranged side by side in the radial direction of the integrated electrode, the second working fluid can pass the first side 6 and the second side 7 at the same time, which makes it easy for more of the second working fluid to fail to adhere to (or approach) the hollow tube electrode 1 to enter the second gap region 5.

[0105] See appendix Figure 3 In this embodiment, the end face of the second liquid outlet section 223 near the liquid outlet of the first flushing channel 11 is a plane, and the normal of this plane is parallel to the length direction of the first flushing channel 11. This arrangement reduces the difficulty of processing the second liquid outlet section 223 and allows more deionized water to flow out, thus ensuring the suppression of stray corrosion on the surface of the workpiece 3.

[0106] See appendix Figure 3In this embodiment, along the fluid flow direction within the first flushing channel 11, the discharge end face of the second discharge section 223, the discharge end face of the first discharge section 213, and the discharge end face of the first flushing channel 11 are arranged sequentially and at intervals.

[0107] Along the fluid flow direction in the first flushing channel 11, the discharge end face of the first discharge section 213 and the discharge end face of the first flushing channel 11 are arranged sequentially and at intervals to avoid the first discharge section 213 from easily touching the workpiece 3 and affecting the servo feed process.

[0108] Along the fluid flow direction in the first flushing channel 11, the discharge end face of the second discharge section 223 and the discharge end face of the first discharge section 213 are arranged sequentially and at intervals to avoid unnecessary structural arrangements, such as avoiding setting the length dimension of the second discharge section 223 within an unnecessary range, reducing structural costs, and also preventing the second discharge section 223 from easily touching the workpiece 3.

[0109] It is understandable that, along the fluid flow direction within the first flushing channel 11, the discharge end face of the second discharge section 223, the discharge end face of the first discharge section 213, and the discharge end face of the first flushing channel 11 are not arranged side by side.

[0110] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A microporous electro-spark electrochemical composite fabrication integrated electrode, characterized in that: include: Hollow tube electrode (1) is provided with a first flushing channel (11). The liquid supply electrode (2) is fixedly disposed on the outside of the hollow tube electrode (1) and is provided with a second flushing channel (21) and a third flushing channel (22). The output ends of the second flushing channel (21) and the third flushing channel (22) are inclined toward the hollow tube electrode (1). Along the radial direction of the hollow tube electrode (1), the output end of the third flushing channel (22) is located on the side of the output end of the second flushing channel (21) away from the hollow tube electrode (1). The first flushing channel (11) and the second flushing channel (21) are used to transport electrolyte, and the third flushing channel (22) is used to transport deionized water.

2. The microporous electro-discharge electrochemical composite fabrication integrated electrode according to claim 1, characterized in that: The outer diameter of the hollow tube electrode (1) is the same as the inner diameter of the liquid supply electrode (2) to improve the structural compactness and structural strength of the integrated electrode.

3. The microporous electro-discharge electrochemical composite fabrication integrated electrode according to claim 1, characterized in that: The hollow tube electrode (1) and the first flushing channel (11) both extend along the length direction of the integrated electrode; The second flushing channel (21) includes a first inlet section (211), a first delivery section (212), and a first outlet section (213) connected in sequence; the first delivery section (212) extends along the length direction of the integrated electrode; the first outlet section (213) is inclined toward the hollow tube electrode (1); The third flushing channel (22) includes a second inlet section (221), a second delivery section (222) and a second outlet section (223) connected in sequence; the second delivery section (222) extends along the length of the integrated electrode; the second outlet section (223) is inclined toward the hollow tube electrode (1).

4. The microporous electro-spark electrochemical composite fabrication integrated electrode according to claim 3, characterized in that: The first liquid outlet section (213) has a first wall (2131) and a second wall (2132) disposed from the inside out; the first wall (2131) has a first side (6) near the liquid outlet of the first liquid outlet section (213), and the second wall (2132) has a second side (7) near the liquid outlet of the first liquid outlet section (213); in the length direction of the integrated electrode, the second side (7) is located on the side of the first side (6) near the liquid outlet of the first flushing channel (11).

5. The microporous electro-spark electrochemical composite fabrication integrated electrode according to claim 3, characterized in that: The end face of the second liquid outlet section (223) near the liquid outlet of the first flushing channel (11) is a plane, and the normal of the plane is parallel to the length direction of the first flushing channel (11).

6. The microporous electro-spark electrochemical composite fabrication integrated electrode according to claim 3, characterized in that: Along the fluid flow direction within the first flushing channel (11), the discharge end face of the second discharge section (223), the discharge end face of the first discharge section (213), and the discharge end face of the first flushing channel (11) are arranged sequentially and at intervals.

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