A device and method for electrolytic machining of a multi-directional sliding variable-section sleeve

Abstract

This invention discloses an apparatus and method for multi-directional sliding variable cross-section sleeve-shaped electrolytic machining, relating to the field of electrolytic machining technology. It includes a base, a flow-guiding sealing sleeve, an end-face working cathode, a first shielding cathode, a second shielding cathode, a third shielding cathode, and a fourth shielding cathode. The flow-guiding sealing sleeve is disposed on the base and has a flow-guiding channel for introducing electrolyte. The end-face working cathode is disposed on the flow-guiding sealing sleeve and has an outlet. The flow-guiding channel communicates with the outlet. The first, second, third, and fourth shielding cathodes all shield the outlet. This invention ensures the accuracy of sleeve-shaped electrolytic machining through shielding. Compared to existing rotary sleeve-shaped machining methods, it achieves controllable deformation of the sleeve contour, significantly improving the uniformity of the allowance and laying a solid foundation for subsequent precision machining.

Description

Technical Field

[0001] This invention relates to the field of electrolytic machining technology, and in particular to an apparatus and method for multi-directional sliding variable cross-section sleeve electrolytic machining. Background Technology

[0002] Integral bladed disks (IBDs) are an indispensable component of aero engines. They integrate the blades and hub of a traditional bladed disk into a single unit, replacing the previously used tenon and mortise structure. This reduces the number of parts and the overall weight, while also achieving higher efficiency and thrust-to-weight ratio. However, the manufacturing process of IBDs is challenging due to their narrow passageways, complex surfaces, high precision requirements, and the use of difficult-to-machine materials.

[0003] Electrolytic machining is an advanced manufacturing technology that uses the principle of electrochemical dissolution of anodic metal to remove materials. It is a non-traditional machining method for shaping workpieces. As a non-contact machining mode, it has advantages such as good surface quality, high production efficiency, no tool wear, no cutting stress, and no limitation by the physical properties of materials. It has gradually become one of the main methods for manufacturing integral bladed disks.

[0004] The machining of integral bladed disks (IBDs) is divided into blade cascade channel machining and profile finishing. The quality of the blade cascade channel machining directly affects the final machining result and has a significant impact on the final machining accuracy, making it a crucial step in IBD machining. Sleeve-fitting machining is one of the main existing electrolytic machining methods for blade cascade channels. The patent "Device and Method for Pulse Dynamic Sleeve-fitting Electrolytic Machining of Blades with Chamfered Tips" (application number 202111234865.0) discloses a device and method for machining blade profiles with uniform cross-sections in a single operation using pulse dynamic sleeve-fitting electrolytic machining. The patent "A Ring Electrode and Process Method for Electrolytic Grooving Machining of Integral Bladed Disks" (application number 201410513097.6) discloses a machining electrode and method that can significantly improve the efficiency of electrolytic grooving machining of integral bladed disks. These two patents effectively machine the inlet and outlet sides and improve the machining accuracy and efficiency of bladed disk channels. However, both are designed for machining blade channels with uniform cross-sections, and there is still a problem of large allowance differences when machining blade cascade channels with variable cross-sections. The patent "Dynamic Deformation Electrolytic Machining Method and Application of Flexible Electrode" (application number 202110860375.5) discloses a method for machining complex surfaces such as closed integral bladed disks by deforming electrodes of simple shapes, thereby improving electrolytic machining efficiency and ensuring machining accuracy. This method enables the machining of blades with variable cross-sections, but it cannot machine the inlet and outlet edges, and the machining accuracy of the inlet and outlet edges cannot be controlled. The patent "A Variable Working Cathode for the Cavity of an Electrolytic Machining Integral Bladed Disk with Large Twisted Blades" (application number 201910326896.5) provides a sleeve electrolytic machining electrode that deforms the inner cavity through multiple connecting rods, enabling the sleeve electrolytic machining of large twisted blades. Although the machining methods mentioned in the above patents can achieve variable cross-section machining, because the connecting rod changes with a constant perimeter, it is difficult to machine blades with large cross-section changes and large differences in chord length. Currently, with the development of the aero-engine field, in order to obtain better power and higher efficiency and maximize the power per unit volume, the blade profile is developing in a more curved, twisted, swept, and complex direction. Therefore, it is urgent to seek new processing equipment and methods. Summary of the Invention

[0005] The purpose of this invention is to provide an apparatus and method for multi-directional sliding variable cross-section sleeve electrolytic machining. By shielding, the accuracy of sleeve electrolytic machining is ensured. Compared with the existing rotary sleeve machining method, the controllable deformation of the sleeve contour can be achieved, which can greatly improve the uniformity of the allowance and lay a good foundation for the next step of precision machining.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] This invention provides an apparatus for multi-directional sliding variable cross-section sleeve-shaped electrolytic machining, comprising a base, a flow guiding sealing sleeve, an end-face working cathode, a first shielding cathode, a second shielding cathode, a third shielding cathode, and a fourth shielding cathode. The flow guiding sealing sleeve is disposed on the base and has a flow guiding channel for introducing electrolyte. The end-face working cathode is disposed on the flow guiding sealing sleeve and has an outlet. The flow guiding channel communicates with the outlet. The first, second, third, and fourth shielding cathodes are all used to shield the outlet.

[0008] Preferably, the shape of the outlet position corresponding to the first shielding cathode matches the end face shape of the first shielding cathode, the shape of the outlet position corresponding to the second shielding cathode matches the end face shape of the second shielding cathode, the shape of the outlet position corresponding to the third shielding cathode matches the end face shape of the third shielding cathode, and the shape of the outlet position corresponding to the fourth shielding cathode matches the end face shape of the fourth shielding cathode.

[0009] Preferably, the flow guiding sealing sleeve is provided with an insulating baffle, the insulating baffle is sealed to the flow guiding sealing sleeve, the end face working cathode is disposed on the insulating baffle, and the end face working cathode is sealed to the insulating baffle.

[0010] Preferably, the first shielding cathode and the second shielding cathode are disposed opposite to each other, the first shielding cathode achieves relative movement with the second shielding cathode through a first driving structure, and the second shielding cathode achieves relative movement with the first shielding cathode through a second driving structure.

[0011] Preferably, a first through groove is formed at the position corresponding to the first shielding cathode on the end face working cathode, and a second through groove is formed at the position corresponding to the second shielding cathode on the end face working cathode. The first shielding cathode extends into the end face working cathode through the first through groove, and the second shielding cathode extends into the end face working cathode through the second through groove.

[0012] Preferably, the third shielding cathode and the fourth shielding cathode are disposed opposite to each other, and both the third shielding cathode and the fourth shielding cathode are located in the flow guiding channel.

[0013] Preferably, the system further includes a third driving structure and a fourth driving structure, both located outside the flow-guiding sealing sleeve. The power output end of the third driving structure is connected to the third shielding cathode, and the third shielding cathode achieves relative movement with the fourth shielding cathode through the third driving structure. The power output end of the fourth driving structure is connected to the fourth shielding cathode, and the fourth shielding cathode achieves movement with the third shielding cathode through the fourth driving structure.

[0014] Preferably, it further includes a first shielding cathode support and a second shielding cathode support, one end of the first shielding cathode support is connected to a third shielding cathode, the other end of the first shielding cathode support is connected to the third driving structure, one end of the second shielding cathode support is connected to a fourth shielding cathode, and the other end of the second shielding cathode support is connected to the fourth driving structure.

[0015] Preferably, it also includes a base plate, the flow guiding sealing sleeve is disposed on the base plate, the base plate has a liquid inlet, and the liquid inlet is connected to the flow guiding channel.

[0016] The present invention also provides a processing method using the aforementioned multi-directional sliding variable cross-section sleeve electrolytic machining apparatus, comprising the following steps:

[0017] Step 1: Mount the workpiece to be processed on the worktable and connect the workpiece to the positive terminal of the power supply;

[0018] Step 2: Connect the end-face working cathode, the first shielding cathode, the second shielding cathode, the third shielding cathode, and the fourth shielding cathode to the negative terminal of the power supply respectively;

[0019] Step 3: Check and calibrate the position of the workpiece and the working cathode on the end face;

[0020] Step 4: Align the end face working cathode with the workpiece and confirm the initial relative position and machining clearance, while also confirming the machining trajectory;

[0021] Step 4: Electrolyte is introduced. The electrolyte flows to the processing surface at a certain speed after passing through the flow channel of the flow-guiding sealing sleeve and the liquid outlet of the working cathode on the end face.

[0022] Step 5: Connect the power supply for processing. During the processing, the workpiece is rotated and fed by the worktable. The first shielding cathode, the second shielding cathode, the third shielding cathode and the fourth shielding cathode move in straight lines along the four directions of the workpiece.

[0023] Step Six: After processing is complete, disconnect the power supply and stop the electrolyte supply. Remove the processed workpiece.

[0024] The present invention achieves the following technical effects compared to the prior art:

[0025] This invention, based on the cross-sectional shape of the workpiece, achieves the processing of variable cross-section workpieces by blocking the liquid outlet of the end-face working cathode through a first, second, third, and fourth blocking cathode. The processed blade is located in the guide channel. The shape of the sleeve electrolytic machining is continuously changed by the blocking of the end-face working cathode and the first, second, third, and fourth blocking cathodes, thereby reducing the allowance difference. This invention ensures the accuracy of sleeve electrolytic machining through blocking. Compared with the existing rotary sleeve machining method, it achieves controllable deformation of the sleeve contour, which can significantly improve the uniformity of the allowance and lay a good foundation for the next step of precision machining. Attached Figure Description

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of the apparatus for multi-directional sliding variable cross-section sleeve electrolytic machining according to the present invention;

[0028] Figure 2 Exploded view of the end-face working cathode, the first shielding cathode, the second shielding cathode, the third shielding cathode, and the fourth shielding cathode of the present invention;

[0029] Figure 3 This is a schematic diagram of the end-face working cathode, the first shielding cathode, the second shielding cathode, the third shielding cathode, and the fourth shielding cathode of the present invention.

[0030] Figure 4 This is a schematic diagram of the end-face working cathode and insulating baffle of the present invention;

[0031] Figure 5 A cross-sectional view of the apparatus for multi-directional sliding variable cross-section sleeve electrolytic machining in this invention;

[0032] Figure 6a This is a schematic diagram showing the obstruction of the liquid outlet by the first shielding cathode, the second shielding cathode, and the third shielding cathode in this invention;

[0033] Figure 6b For the process Figure 6a A schematic diagram of the cross-section after masking (the shaded area represents the removed portion);

[0034] Figure 7a For the workpiece to pass through as Figure 6aThe diagram shows the obstruction of the liquid outlet after the rotation, the retraction of the first shielding cathode, the retraction of the second shielding cathode, the retraction of the third shielding cathode, and the forward movement of the fourth shielding cathode.

[0035] Figure 7b For the process Figure 7a A schematic diagram of the cross-section after masking (the shaded area represents the removed portion);

[0036] Figure 8 A schematic diagram of the integral bladed disk being machined using the multi-directional sliding variable cross-section sleeve electrolytic machining apparatus of the present invention;

[0037] Wherein: 1: First driving structure, 2: First shielding cathode, 3: End face working cathode, 4: Third driving structure, 5: Third shielding cathode, 6: Second driving structure, 7: Second shielding cathode, 8: Flow guiding sealing sleeve, 9: Base plate, 10: Fourth driving structure, 10-1: Second shielding cathode support, 11: Fourth shielding cathode, 12: Insulating baffle, 13: Liquid outlet. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] The purpose of this invention is to provide an apparatus and method for multi-directional sliding variable cross-section sleeve electrolytic machining. By shielding, the accuracy of sleeve electrolytic machining is ensured. Compared with the existing rotary sleeve machining method, the controllable deformation of the sleeve contour can be achieved, which can greatly improve the uniformity of the allowance and lay a good foundation for the next step of precision machining.

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Example 1

[0042] like Figures 1 to 8As shown: This embodiment provides a device for multi-directional sliding variable cross-section sleeve electrolytic machining, including a base, a flow guiding sealing sleeve 8, an end face working cathode 3, a first shielding cathode 2, a second shielding cathode 7, a third shielding cathode 5, and a fourth shielding cathode 11. The flow guiding sealing sleeve 8 is disposed on the base and has a flow guiding channel for introducing electrolyte. The end face working cathode 3 is disposed on the flow guiding sealing sleeve 8 and has an outlet 13. The flow guiding channel is connected to the outlet 13. The first shielding cathode 2 is an air inlet side shielding cathode, the second shielding cathode 7 is an exhaust side shielding cathode, the third shielding cathode 5 is a blade back shielding cathode, and the fourth shielding cathode 11 is a blade basin shielding cathode. The first shielding cathode 2, the second shielding cathode 7, the third shielding cathode 5, and the fourth shielding cathode 11 are all used to shield the outlet 13. In this embodiment, the end face working cathode 3 is a substrate for multi-directional sliding variable cross-section sleeve processing. The profile of the end face working cathode 3 is determined according to the maximum envelope surface of the blade control line. The variable cross-section sleeve is mainly achieved by the first shielding cathode 2, the second shielding cathode 7, the third shielding cathode 5 and the fourth shielding cathode 11 shielding the liquid outlet 13 of the end face working cathode 3.

[0043] Specifically, in this embodiment, the shape of the outlet hole 13 corresponding to the first shielding cathode 2 matches the shape of the end face of the first shielding cathode 2, the shape of the outlet hole 13 corresponding to the second shielding cathode 7 matches the shape of the end face of the second shielding cathode 7, the shape of the outlet hole 13 corresponding to the third shielding cathode 5 matches the shape of the end face of the third shielding cathode 5, and the shape of the outlet hole 13 corresponding to the fourth shielding cathode 11 matches the shape of the end face of the fourth shielding cathode 11.

[0044] In this embodiment, an insulating baffle 12 is provided on the flow guiding sealing sleeve 8. The insulating baffle 12 is sealed to the flow guiding sealing sleeve 8. The end face working cathode 3 is disposed inside the insulating baffle 12. The end face working cathode 3 is connected to the insulating baffle 12 and the flow guiding sealing sleeve 8 by a pin. The end face working cathode 3 is sealed to the insulating baffle 12.

[0045] In this embodiment, the first shielding cathode 2 and the second shielding cathode 7 are arranged opposite to each other. The end face working cathode 3 has a first through groove at the position corresponding to the first shielding cathode 2, and a second through groove at the position corresponding to the second shielding cathode 7. The first shielding cathode 2 extends into the end face working cathode 3 through the first through groove, and the second shielding cathode 7 extends into the end face working cathode 3 through the second through groove. The first shielding cathode 2 and the second shielding cathode 7 are slidably and sealingly connected to the end face working cathode 3. The first shielding cathode 2 achieves relative movement with the second shielding cathode 7 through the first driving structure 1, and the second shielding cathode 7 achieves relative movement with the first shielding cathode 2 through the second driving structure 6.

[0046] In this embodiment, the third shielding cathode 5 and the fourth shielding cathode 11 are arranged opposite to each other. The movement directions of the third shielding cathode 5 and the fourth shielding cathode 11 are at a certain angle to the movement directions of the first shielding cathode 2 and the second shielding cathode 7. Both the third shielding cathode 5 and the fourth shielding cathode 11 are located in the flow channel.

[0047] This embodiment also includes a third driving structure 4 and a fourth driving structure 10. Both the third driving structure 4 and the fourth driving structure 10 are located outside the flow guiding sealing sleeve 8. The power output end of the third driving structure 4 is connected to the third shielding cathode 5. The third shielding cathode 5 achieves relative movement with the fourth shielding cathode 11 through the third driving structure 4. The power output end of the fourth driving structure 10 is connected to the fourth shielding cathode 11. The fourth shielding cathode 11 achieves movement with the third shielding cathode 5 through the relative movement of the fourth driving structure 10 and the third shielding cathode 5.

[0048] This embodiment also includes a base plate 9, and a flow guiding sealing sleeve 8 is disposed on the base plate 9. The base plate 9 has an inlet, which is connected to the flow guiding channel. The size of the inlet is smaller than the size of the flow guiding channel. The electrolyte enters the flow guiding channel through the inlet, and the inlet reduces the inlet area and increases the water pressure.

[0049] This embodiment also includes a first shielding cathode 2 bracket and a second shielding cathode 7 bracket. One end of the first shielding cathode 2 bracket is connected to the third shielding cathode 5, and the other end of the first shielding cathode 2 bracket is connected to the third driving structure 4. One end of the second shielding cathode 7 bracket is connected to the fourth shielding cathode 11, and the other end of the second shielding cathode 7 bracket is connected to the fourth driving structure 10. The first shielding cathode 2 bracket and the second shielding cathode 7 bracket pass through the gap between the base plate 9 and the flow guiding sealing sleeve 8, respectively. The first shielding cathode 2 bracket and the second shielding cathode 7 bracket slide and seal with the base plate 9 and the flow guiding sealing sleeve 8, respectively.

[0050] In this embodiment, the support ends of the first shielding cathode 2 support and the second shielding cathode 7 support are "C" shaped structures, which can provide good support for the third shielding cathode 5 and the fourth shielding cathode 11, and the structure is stable.

[0051] In this embodiment, the first driving structure 1, the second driving structure 6, the third driving structure 4, and the fourth driving structure 10 are all linear driving structures.

[0052] In this embodiment, based on the cross-sectional shape of the workpiece, the outlet 13 of the end face working cathode 3 is blocked by the first blocking cathode 2, the second blocking cathode 7, the third blocking cathode 5, and the fourth blocking cathode 11 to achieve the processing of the variable cross-section workpiece. The processed blade is located in the guide channel. The shape of the sleeve electrolytic machining is continuously changed by the blocking of the end face working cathode 3 and the first blocking cathode 2, the second blocking cathode 7, the third blocking cathode 5, and the fourth blocking cathode 11, thereby reducing the allowance difference. This embodiment ensures the accuracy of the sleeve electrolytic machining through blocking. Compared with the existing rotary sleeve machining method, it achieves controllable deformation of the sleeve contour, which can greatly improve the uniformity of the allowance and lay a good foundation for the next step of precision machining.

[0053] In this embodiment, the first shielding cathode 2, the second shielding cathode 7, the third shielding cathode 5 and the fourth shielding cathode 11 are arranged in multiple directions to achieve electrolytic grooving. The variable cross-section sleeve machining of blades with large bending and twisting can be achieved through the machining hole 13 of the working cathode 3 on the shielding end face. This machining method is suitable for rough machining of various twisted blades.

[0054] This embodiment uses a multi-directionally arranged first shielding cathode 2, second shielding cathode 7, third shielding cathode 5 and fourth shielding cathode 11 for feeding to achieve electrolytic grooving. In addition to being highly adaptable to the processing of variable cross-section blades, it is also suitable for other complex variable cross-section applications, such as diffuser processing. For diffuser blades, it can greatly reduce the allowance difference of sleeve grooving and significantly improve the processing accuracy.

[0055] For blades with large degrees of twist, variable cross-section blades with smaller allowance differences and closer to the theoretical model can be formed. At the same time, because the first shielding cathode 2, the second shielding cathode 7, the third shielding cathode 5 and the fourth shielding cathode 11 set in multiple directions modify the machining profile of the end face working cathode 3, it has a stronger adaptability to machining this type of variable cross-section blade, laying the groundwork for the next step of precision machining of variable cross-section blades.

[0056] Example 2

[0057] This embodiment provides a processing method using the multi-directional sliding variable cross-section sleeve electrolytic machining apparatus of Embodiment 1, including the following steps:

[0058] Step 1: Mount the workpiece to be processed on a worktable with a rotary axis and a linear feed axis. The worktable can drive the workpiece to rotate and translate, and connect the workpiece to the positive terminal of the power supply.

[0059] Step 2: Connect the end-face working cathode 3, the first shielding cathode 2, the second shielding cathode 7, the third shielding cathode 5 and the fourth shielding cathode 11 to the negative terminal of the power supply respectively.

[0060] Step 3: Check and calibrate the position of the workpiece and the working cathode 3 on the end face;

[0061] Step 4: Align the end face working cathode 3 with the workpiece and confirm the initial relative position and machining clearance, while also confirming the machining trajectory;

[0062] Step 4: Electrolyte is introduced through the inlet and the flow channel. After passing through the flow channel of the flow sealing sleeve 8 and the outlet 13 of the end face working cathode 3, the electrolyte flows to the processing surface at a certain speed.

[0063] Step 5: Connect the power supply for processing. During the processing, the workpiece is rotated and fed by the rotating axis of the worktable and the linear feed axis. The first shielding cathode 2, the second shielding cathode 7, the third shielding cathode 5 and the fourth shielding cathode 11 move in a straight line along the four directions of the workpiece to play a shielding role. Under the action of electrochemical anodic dissolution reaction, the end face material of the workpiece facing the cathode processing blade will dissolve. As the processing progresses, the entire bladed disk will be processed and shaped.

[0064] Step Six: After processing is complete, disconnect the power supply and stop the electrolyte supply. Remove the processed workpiece. The processing parameters and path are continuously adjusted through measurement to complete the processing of the entire impeller.

[0065] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A processing method using a multi-directional sliding variable cross-section sleeve electrolytic machining apparatus, characterized in that: The apparatus for multi-directional sliding variable cross-section sleeve electrolytic machining includes a base, a flow guiding sealing sleeve, an end-face working cathode, a first shielding cathode, a second shielding cathode, a third shielding cathode, and a fourth shielding cathode. The flow guiding sealing sleeve is disposed on the base and has a flow guiding channel for introducing electrolyte. The end-face working cathode is disposed on the flow guiding sealing sleeve and has an outlet. The flow guiding channel communicates with the outlet. The first shielding cathode, the second shielding cathode, the third shielding cathode, and the fourth shielding cathode are all used to shield the outlet. The processing method using a multi-directional sliding variable cross-section sleeve electrolytic machining apparatus includes the following steps: Step 1: Mount the workpiece to be processed on the worktable and connect the workpiece to the positive terminal of the power supply; Step 2: Connect the end-face working cathode, the first shielding cathode, the second shielding cathode, the third shielding cathode, and the fourth shielding cathode to the negative terminal of the power supply respectively; Step 3: Check and calibrate the position of the workpiece and the working cathode on the end face; Step 4: Align the end face working cathode with the workpiece and confirm the initial relative position and machining clearance, while also confirming the machining trajectory; Step 5: Pass the electrolyte through the flow channel of the flow-guiding sealing sleeve and the outlet of the working cathode on the end face, and the electrolyte flows to the processing surface at a certain speed. Step Six: Connect the power supply for processing. During the processing, the workpiece is rotated and fed by the worktable. The first shielding cathode, the second shielding cathode, the third shielding cathode and the fourth shielding cathode move in straight lines along the four directions of the workpiece. Step 7: After processing is complete, disconnect the power supply and stop the electrolyte supply. Remove the processed workpiece.

2. The processing method of the apparatus for multi-directional sliding variable cross-section sleeve electrolytic machining according to claim 1, characterized in that: The shape of the outlet corresponding to the first shielding cathode matches the shape of the end face of the first shielding cathode, the shape of the outlet corresponding to the second shielding cathode matches the shape of the end face of the second shielding cathode, the shape of the outlet corresponding to the third shielding cathode matches the shape of the end face of the third shielding cathode, and the shape of the outlet corresponding to the fourth shielding cathode matches the shape of the end face of the fourth shielding cathode.

3. The processing method of the apparatus for multi-directional sliding variable cross-section sleeve electrolytic machining according to claim 1, characterized in that: An insulating baffle is provided on the flow guiding sealing sleeve, and the insulating baffle is sealed to the flow guiding sealing sleeve. The end face working cathode is disposed inside the insulating baffle, and the end face working cathode is sealed to the insulating baffle.

4. The processing method of the apparatus for multi-directional sliding variable cross-section sleeve electrolytic machining according to claim 1, characterized in that: The first shielding cathode and the second shielding cathode are disposed opposite to each other. The first shielding cathode achieves relative movement with the second shielding cathode through a first driving structure, and the second shielding cathode achieves relative movement with the first shielding cathode through a second driving structure.

5. The processing method of the apparatus for multi-directional sliding variable cross-section sleeve electrolytic machining according to claim 1, characterized in that: A first through groove is formed at the position corresponding to the first shielding cathode on the end face working cathode, and a second through groove is formed at the position corresponding to the second shielding cathode on the end face working cathode. The first shielding cathode extends into the end face working cathode through the first through groove, and the second shielding cathode extends into the end face working cathode through the second through groove.

6. The processing method of the apparatus for multi-directional sliding variable cross-section sleeve electrolytic machining according to claim 1, characterized in that: The third shielding cathode and the fourth shielding cathode are disposed opposite to each other, and both the third shielding cathode and the fourth shielding cathode are located in the flow guiding channel.

7. The processing method of the apparatus for multi-directional sliding variable cross-section sleeve electrolytic machining according to claim 1, characterized in that: It also includes a third drive structure and a fourth drive structure, both of which are located outside the flow-guiding sealing sleeve. The power output end of the third drive structure is connected to the third shielding cathode, and the third shielding cathode achieves relative movement with the fourth shielding cathode through the third drive structure. The power output end of the fourth drive structure is connected to the fourth shielding cathode, and the fourth shielding cathode achieves movement with the third shielding cathode through the fourth drive structure.

8. The processing method of the apparatus for multi-directional sliding variable cross-section sleeve electrolytic machining according to claim 7, characterized in that: It also includes a first shielding cathode support and a second shielding cathode support. One end of the first shielding cathode support is connected to a third shielding cathode, and the other end of the first shielding cathode support is connected to the third driving structure. One end of the second shielding cathode support is connected to a fourth shielding cathode, and the other end of the second shielding cathode support is connected to the fourth driving structure.

9. The processing method of the apparatus for multi-directional sliding variable cross-section sleeve electrolytic machining according to claim 1, characterized in that: It also includes a base plate, on which the flow guiding and sealing sleeve is disposed, and on which a liquid inlet is provided, which is connected to the flow guiding channel.

Images