A magnetically assisted electrode structure and electrode replacement method

Abstract

The present invention belongs to the field of electrospark machining technology and equipment, and in particular relates to a magnetic-assisted electrode structure and an electrode replacement method. The magnetic-assisted electrode structure includes: a fixing seat, a discharge bead made of a conductive material, and a positioning mechanism connected to the fixing seat. The fixing seat is provided with a receiving hole, and the receiving hole has a discharge hole located in the fixing seat, and a plurality of discharge beads are arranged in the receiving hole; the positioning mechanism has a locking state and an unlocking state for each discharge bead. When the positioning mechanism is in the locking state, each discharge bead is electrically connected and arranged in the receiving hole in sequence, and one of the discharge beads is partially exposed at the discharge hole; when the positioning mechanism is in the unlocking state, the connection between any two adjacent discharge beads is released, so that the discharge bead can be completely separated from the receiving hole at the discharge hole. The present invention improves the convenience and replacement efficiency of discharge bead replacement and positioning.

Description

Technical Field

[0001] The present invention belongs to the field of electric spark machining technology and equipment, and in particular relates to a magnetic auxiliary electrode structure and an electrode replacement method. Background Art

[0002] Currently, due to their high hardness and strength, hard materials are difficult to machine using traditional methods such as grinding, cutting, and polishing. In recent years, electrical discharge machining (EDM) has become a cost-effective pretreatment method for difficult-to-cut materials in glass optical molds. To achieve the design and fabrication of complex workpiece structural contours, many researchers have devoted themselves to developing electrodes with diverse functions and structures, such as rotating copper-nickel electrodes, thin graphite electrodes, bundled electrodes, long laminated electrodes, strip electrodes, and self-assembled spherical electrodes.

[0003] Electrospark machining (EDM) is a non-contact machining method that uses high-energy electrical discharges to rapidly melt reactive materials, regardless of their composition, hardness, strength, and ductility. During the discharge process, electrode wear is an inevitable issue, impacting workpiece shape accuracy and machining efficiency. During EDM, multiple electrodes are typically used sequentially to closely match the designed workpiece contour and structure. After a period of machining, the electrodes must be removed and replaced with new ones.

[0004] However, in traditional EDM, a wedge-shaped pin is generally used to position the electrode ball. Each time the electrode ball is replaced, it needs to be repositioned and calibrated, which makes the replacement of the electrode ball inconvenient, makes the entire machining process cumbersome, greatly increases the machining time, and has low machining efficiency. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a magnetic-assisted electrode structure, aiming to solve the problem of how to improve processing efficiency.

[0006] To achieve the above objectives, the technical solution adopted in this application is:

[0007] In a first aspect, a magnetically assisted electrode structure is provided, comprising: a fixing seat, discharge beads made of a conductive material, and a positioning mechanism connected to the fixing seat, wherein the fixing seat is provided with a receiving hole, the receiving hole having a discharge hole located in the fixing seat, and a plurality of discharge beads are arranged in the receiving hole; the positioning mechanism has a locked state and an unlocked state for each discharge bead, when the positioning mechanism is in the locked state, the discharge beads are sequentially electrically connected and arranged in the receiving hole, wherein one discharge bead is partially exposed at the discharge hole; when the positioning mechanism is in the unlocked state, the connection between any two adjacent discharge beads is released, so that the discharge beads can be completely detached from the receiving hole at the discharge hole.

[0008] In some embodiments, the discharge beads are arranged linearly in the receiving hole, and the discharge beads at the end are partially exposed at the discharge hole.

[0009] In some embodiments, the fixing seat is provided with a fixing groove, the positioning mechanism is located in the fixing groove, and the discharge hole and the fixing groove are respectively located at two ends of the accommodating hole.

[0010] In some embodiments, the fixing groove is connected to the accommodating hole, and the discharge bead located at the end abuts against the positioning mechanism.

[0011] In some embodiments, the positioning mechanism is an electromagnet, and the discharge bead is made of a magnetic material.

[0012] In some embodiments, the fixing seat also has a limiting groove, and the extension direction of the limiting groove is staggered with the extension direction of the accommodating hole. The magnetic assisted electrode structure also includes a limiting mechanism arranged in the limiting groove, and one end of the limiting mechanism abuts the discharge bead located at the discharge hole.

[0013] In some embodiments, the limiting mechanism includes a limiting column slidably set in the limiting groove and an adjusting bolt with one end threadedly connected to the fixing seat, and the other end of the adjusting bolt abuts against the limiting column so that the limiting column presses the discharge bead located at the discharge hole toward the hole wall of the accommodating hole.

[0014] In some embodiments, the fixing seat is further provided with a feed hole connected to the accommodating hole, the discharge beads are placed in the feed hole, and the discharge beads in the feed hole can slide into the accommodating hole under the action of gravity.

[0015] In some embodiments, the discharge beads are in the shape of spheres, blocks or cylinders.

[0016] In a second aspect, a method for replacing an electrode is provided, comprising the following steps:

[0017] The magnetic-assisted electrode structure is prepared, and the positioning mechanism is in the locked state;

[0018] Cutting off the connection between the discharge bead and the power supply, switching the positioning mechanism to the unlocked state, and allowing the discharge bead located at the discharge hole to be separated from the receiving hole;

[0019] Each of the discharge beads in the receiving hole is moved toward the discharge hole to fill a position, and a vacant space is formed in the receiving hole;

[0020] Installing another discharge bead into the empty space of the receiving hole;

[0021] The positioning mechanism is switched to the locking state to reposition the discharge beads in the receiving hole.

[0022] The beneficial effects of the present application are that: the magnetic-assisted electrode structure is in a locked state through the positioning mechanism, so that the discharge beads located in the accommodating hole are abutted in turn and arranged in a predetermined length, and the length of the discharge beads themselves is used to achieve rapid positioning of each discharge bead, and one of the discharge beads is exposed at the discharge hole; when the discharge beads need to be replaced, the positioning mechanism is switched to an unlocked state, and the discharge beads located at the discharge hole can be completely separated from the accommodating hole under the action of their own gravity, and new discharge beads are added to the accommodating hole, and then the positioning mechanism is switched to a locked state, so as to re-position and calibrate each discharge bead, thereby improving the convenience and replacement efficiency of the discharge bead replacement and positioning, and improving the efficiency of electric discharge machining. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 is a schematic diagram of the three-dimensional structure of the magnetic-assisted electrode structure provided in an embodiment of the present application;

[0025] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the magnetic assisted electrode structure from another perspective;

[0026] Figure 3 yes Figure 1 A schematic cross-sectional view of a magnetically assisted electrode structure;

[0027] Figure 4 yes Figure 1 Exploded diagram of the magnetically assisted electrode structure;

[0028] Figure 5 yes Figure 4 A further exploded schematic diagram of the magnetically assisted electrode structure;

[0029] Figure 6 yes Figure 1 A schematic diagram of the three-dimensional structure of the base of the magnetic assisted electrode structure;

[0030] Figure 7 This is a flow chart of the electrode replacement method provided in an embodiment of the present application.

[0031] Among them, the reference numerals in the figures are:

[0032] 100. Magnetic-assisted electrode structure; 10. Fixing seat; 20. Discharge bead; 30. Positioning mechanism; 11. Discharge hole; 12. Fixing slot; 40. Limiting mechanism; 13. Feeding hole; 101. Base; 102. Cover plate; 103. Upper interlayer; 104. Lower interlayer; 14. Accommodating hole; 41. Adjusting bolt; 42. Limiting column; 15. Limiting slot; 16. Threaded hole; 105. Limiting step; DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit this application.

[0034] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0035] See also Figures 1 to 3 An embodiment of the present application provides a magnetic-assisted electrode structure 100, which is used to perform electrical discharge machining on a workpiece. The magnetic-assisted electrode structure 100 can be connected to the negative pole of a power supply, and the workpiece is connected to the anode of the power supply, so that the magnetic-assisted electrode structure 100 can discharge the workpiece to perform electrical spark machining on the workpiece. The workpiece can be a forming mold for glass molding.

[0036] See also Figures 1 to 3The magnetically assisted electrode structure 100 includes: a fixing base 10, a discharge bead 20 made of a conductive material, and a positioning mechanism 30 connected to the fixing base 10. The fixing base 10 is provided with a receiving hole 14. The receiving hole 14 has a discharge hole 11 located at the fixing base 10. A plurality of discharge beads 20 are arranged in the receiving hole 14. Each discharge bead 20 has the same structure and size and is arranged in a predetermined length. The fixing base 10 can be made of an insulating material, which can be plastic or ceramic. The fixing base 10 can also be made of a conductive material, such as metallic copper. There is no restriction here and it can be selected according to actual conditions.

[0037] See also Figures 1 to 3 The positioning mechanism 30 has a locked state and an unlocked state for each discharge bead 20. When the positioning mechanism 30 is in the locked state, the discharge beads 20 are electrically abutted and arranged in the accommodating hole 14 in sequence, and one of the discharge beads 20 is partially exposed at the discharge hole 11; that is, any two adjacent electrode beads are abutted and electrically connected, and any of the discharge beads 20 can be electrically connected to the negative pole of the power supply.

[0038] See also Figures 1 to 3 It is understood that when the discharge beads 20 are arranged in sequence, they can be arranged linearly along the vertical direction, with the lowest discharge bead 20 partially exposed at the discharge hole 11; or they can be arranged in a curved line within a vertical plane. In the curved arrangement, a discharge bead 20 at the end can be located at the discharge hole 11, or a discharge bead 20 in the middle can be located at the discharge hole 11, with only one discharge bead 20 exposed at the discharge hole 11 and serving as an electrode during the EDM process. In this embodiment, the discharge beads 20 are arranged vertically, with the lower discharge bead 20 exposed at the discharge hole 11 and the upper discharge bead 20 adjacent to the positioning mechanism 30.

[0039] See also Figures 1 to 3 The predetermined length is the sum of the lengths of the discharge beads 20 within the receiving hole 14. In the embodiment of the present application, there are three discharge beads 20 within the receiving hole 14, and the predetermined length is the length of the three discharge beads 20 arranged along the receiving hole 14. It is understood that each discharge bead 20 is electrically connected to the negative pole of the power supply. For example, if the fixing base 10 is made of a conductive material and the fixing base 10 is connected to the negative pole of the power supply via a wire, each discharge bead 20 is electrically in contact with the fixing base 10. During the EDM process, the discharge hole 11 is positioned downward, and the workpiece is located below the discharge hole 11. The discharge beads 20 located at the discharge hole 11 can perform EDM on the workpiece.

[0040] When the positioning mechanism 30 is in the unlocked state, the connection between any two adjacent discharge beads 20 is released, so that the discharge bead 20 at the bottom can completely separate from the accommodating hole 14 at the discharge hole 11 under the action of its own gravity, and the discharge beads 20 above move downward to fill their positions in turn, thereby realizing the replacement of the discharge beads 20.

[0041] See also Figures 1 to 3 The magnetic-assisted electrode structure 100 provided in the embodiment of the present application is in a locked state through the positioning mechanism 30, so that the discharge beads 20 located in the accommodating hole 14 are abutted in sequence and arranged in a predetermined length, and the length of the discharge beads 20 themselves is used to quickly position each discharge bead 20, and one of the discharge beads 20 is exposed at the discharge hole 11; when the discharge bead 20 needs to be replaced, the positioning mechanism 30 is switched to the unlocked state, and the discharge bead 20 located at the discharge hole 11 can be completely separated from the accommodating hole 14 under the action of its own gravity, and then a new discharge bead 20 is added to the accommodating hole 14, and then the positioning mechanism 30 is switched to the locked state, so as to re-position and calibrate each discharge bead 20, thereby improving the convenience and replacement efficiency of the discharge bead 20 replacement and positioning, and improving the efficiency of electric discharge machining.

[0042] See also Figures 1 to 3 In some embodiments, the discharge beads 20 are linearly arranged in the receiving hole 14 , and the discharge beads 20 at the end are partially exposed at the discharge hole 11 .

[0043] It is understood that the arrangement of the discharge beads 20 is similar to the shape of the extension path of the receiving hole 14. For example, when the extension path of the receiving hole 14 is an arc, the discharge beads 20 are arranged in an arc; when the extension path of the receiving hole 14 is a straight line, the discharge beads 20 are arranged in a straight line. In this embodiment, the extension path of the receiving hole 14 is a straight line along the vertical direction, and the discharge beads 20 at the bottom are partially exposed. In other embodiments, the selection can be made based on actual conditions and is not limited here.

[0044] See also Figures 1 to 3 When the discharge beads 20 need to be replaced, the power is cut off, the positioning mechanism 30 is in the unlocked state, the discharge bead 20 at the bottom is separated from the accommodating hole 14, and each discharge bead 20 in the accommodating hole 14 moves downward in turn by the distance of one discharge bead 20, and a new discharge bead 20 is added above the accommodating hole 14, and then the positioning mechanism 30 is switched to the locked state, so that each discharge bead 20 is repositioned and calibrated again, which is highly efficient and the operation process is simple.

[0045] See also Figures 4 to 6 In some embodiments, the fixing seat 10 is provided with a fixing groove 12 , the positioning mechanism 30 is located in the fixing groove 12 , and the discharge hole 11 and the fixing groove 12 are respectively located at two ends of the accommodating hole 14 .

[0046] Optionally, the fixing groove 12 is located at one end of the accommodating hole 14, which can improve the locking and positioning ability of the positioning mechanism 30 on each discharge bead 20, so that each discharge bead 20 can be positioned in a timely and effective manner, making the release and positioning of the discharge bead 20 more stable, and reducing positioning failure caused by instability.

[0047] See also Figures 4 to 6 In some embodiments, the fixing groove 12 is connected to the accommodating hole 14 , and the discharge bead 20 located at the end abuts against the positioning mechanism 30 .

[0048] Optionally, the discharge beads 20 can be accurately positioned through direct contact between the discharge beads 20 and the positioning mechanism 30 , thereby preventing the discharge beads 20 from falling off or unexpectedly shifting.

[0049] See also Figures 4 to 6 In some embodiments, the positioning mechanism 30 is an electromagnet, and the discharge bead 20 is made of a magnetic material. The electromagnet can quickly generate or eliminate magnetic force by controlling the current, achieving rapid positioning or release of the discharge bead 20, greatly improving the response speed of the device.

[0050] Optionally, the magnetic material is not limited to iron material, ferrite material, cobalt alloy or nickel material, and is not limited here. It can also be other magnetic materials and can be selected according to actual conditions.

[0051] It can be understood that when the electromagnet is in a charging state, the positioning mechanism 30 is in a locked state, and the magnetic field generated by the electromagnet can act on each discharge bead 20, so that each discharge bead 20 is arranged in sequence and electrically connected; when the electromagnet is in a power-off state, the positioning mechanism 30 is in an unlocked state, and the magnetic field generated by the electromagnet disappears, thereby releasing the positioning and connection of each discharge bead 20, facilitating the subsequent replacement of the discharge beads 20.

[0052] See also Figures 4 to 6 In some embodiments, the fixing seat 10 further defines a limiting groove 15 , and the extension direction of the limiting groove 15 is staggered with the extension direction of the accommodating hole 14 . The magnetic-assisted electrode structure 100 further includes a limiting mechanism 40 disposed in the limiting groove 15 , and one end of the limiting mechanism 40 abuts against the discharge bead 20 located at the discharge hole 11 .

[0053] Optionally, in actual use, the extension direction of the limiting groove 15 is along the horizontal direction, and the extension direction of the accommodating hole 14 is along the vertical direction. The positioning mechanism 30 is first switched to the locked state, and then one end of the limiting mechanism 40 is abutted against and positioned at the discharge hole 11, so that each discharge bead 20 is stably positioned in the accommodating hole 14.

[0054] See also Figures 4 to 6In some embodiments, the limiting mechanism 40 includes a limiting column 42 slidably set in the limiting groove 15 and an adjusting bolt 41 with one end threadedly connected to the fixing seat 10, and the other end of the adjusting bolt 41 abuts against the limiting column 42 so that the limiting column 42 presses the discharge bead 20 located at the discharge hole 11 toward the hole wall of the accommodating hole 14.

[0055] Optionally, a threaded hole 16 is provided on the fixing base 10, and an adjusting bolt 41 is screwed into the threaded hole 16. By rotating the adjusting bolt 41, the limiting column 42 can be driven to slide in the limiting groove 15. For example, by tightening the adjusting bolt 41, the limiting column 42 is driven to press the discharge bead 20 located at the discharge hole 11. When the discharge bead 20 needs to be replaced, the adjusting bolt 41 is rotated in the opposite direction. The discharge bead 20 can push the limiting column 42 away due to its own gravity and fall from the discharge hole 11. Here, the discharge hole 11 can be blocked to facilitate the subsequent discharge bead 20 to slide downward one discharge bead 20 at a time. After the new discharge bead 20 is added, the positioning mechanism 30 is switched to the locked state, and the adjusting bolt 41 is tightened again. The limiting column 42 can also prevent the discharge bead 20 located at the discharge hole 11 from shaking in the horizontal direction during machining, thereby improving the reliability and machining accuracy of the discharge machining.

[0056] Optionally, the shape of the end face of the limiting column 42 abutting the discharge bead 20 is adapted to the surface shape of the discharge bead 20, so that the end face of the limiting column 42 can fit tightly with the discharge bead 20. For example, when the discharge bead 20 is spherical, the end face of the limiting column 42 is a concave arc surface.

[0057] See also Figures 4 to 6 In some embodiments, the discharge beads 20 are spherical, block-shaped, or cylindrical. Block-shaped discharge beads 20 may be cube-shaped, with the faces of the discharge beads 20 abutting against each other in sequence. Cylindrical discharge beads 20 may have their cylindrical end faces abutting against each other in sequence.

[0058] In the present application, the discharge beads 20 are spherical, and the diameter of the discharge beads 20 can be 5 mm. In other embodiments, the diameter can be selected according to actual conditions and is not limited here.

[0059] See also Figures 4 to 6 In some embodiments, the fixing seat 10 is further provided with a feed hole 13 connected to the accommodating hole 14. The discharge beads 20 are placed in the feed hole 13. The extension direction of the feed hole 13 has an angle with the horizontal plane, such as 30 degrees. The discharge beads 20 in the feed hole 13 can automatically slide into the accommodating hole 14 under the action of gravity.

[0060] It can be understood that when the positioning mechanism 30 is in the unlocked state, the discharge beads 20 located at the discharge hole 11 detach from the accommodating hole 14 under the action of their own gravity, and the discharge beads 20 in the accommodating hole 14 slide down the distance of one discharge bead 20 in turn. At this time, a vacancy is formed in the accommodating hole 14, and a discharge bead 20 in the feed hole 13 fills the vacancy in sequence, and then the positioning mechanism 30 is switched to the locked state, so that each discharge bead 20 in the accommodating hole 14 can be quickly positioned and calibrated by its own distance.

[0061] See also Figure 7 , the embodiment of the present application also provides an electrode replacement method, which includes the following steps:

[0062] S1: Prepare the magnetic assisted electrode structure 100, the positioning mechanism 30 is in a locked state, and the discharge beads 20 perform electrical discharge machining on the workpiece;

[0063] S2: After a certain period of EDM, the discharge bead 20 located at the discharge hole 11 is worn. At this time, the EDM is stopped, the connection between the discharge bead 20 and the power supply is cut off, and the positioning mechanism 30 is switched from the locked state to the unlocked state, so that the discharge bead 20 located at the discharge hole 11 is separated from the receiving hole 14. At the same time, the discharge bead 20 behind is restricted from being separated from the receiving hole 14. For example, the discharge bead 20 behind can be gently held with a tool or a finger.

[0064] S3: Each discharge bead 20 in the receiving hole 14 is moved toward the discharge hole 11 by a predetermined distance to fill the position, and a vacant space is formed in the receiving hole 14; the predetermined distance is the length of one discharge bead 20 itself;

[0065] S4: another discharge bead 20 that has not been processed by electrical discharge is installed into the receiving hole 14 to fill the empty space in the receiving hole 14. A plurality of discharge beads 20 that have not been processed by electrical discharge are placed in the feeding hole 13. One discharge bead 20 slides along the feeding hole 13 into the receiving hole 14 and fills the empty space. The discharge beads 20 in the feeding hole 13 are filled in turn.

[0066] S5: Switch the positioning mechanism 30 to a locked state, so that each discharge bead 20 is repositioned and calibrated again by its own distance, and each discharge bead 20 in the accommodating hole 14 is repositioned.

[0067] It is understandable that during the discharge machining process, the discharge beads 20 located at the discharge hole 11 will produce wear. With the help of the spacing between the discharge beads 20 themselves and the adsorption of the electromagnet, the discharge beads 20 located in the accommodating hole 14 are arranged in a vertical straight line. The spacing between the discharge beads 20 themselves is used to ensure that the total height of the electrode in the accommodating hole 14 remains unchanged, thereby achieving rapid positioning and calibration.

[0068] See also Figures 4 to 6Optionally, the fixing seat 10 includes a base 101, a cover plate 102 cooperating with the base 101, an upper interlayer 103 and a lower interlayer 104, the upper interlayer 103 and the lower interlayer 104 are both located between the base 101 and the cover plate 102, the base 101, the upper interlayer 103 and the lower interlayer 104 jointly form a feed hole 13, a limiting groove 15 is opened in the lower interlayer 104, the lower interlayer 104 and the base 101 also form a accommodating hole 14, the fixing groove 12 is opened in the upper interlayer 103, and the threaded hole 16 is opened in the base 101.

[0069] A cover plate 102 is placed on the base 101 and fastened with bolts. A limiting step 105 is provided on the base 101 to prevent the upper interlayer 103 and the lower interlayer 104 from shifting laterally and preventing misalignment, thereby ensuring assembly accuracy.

[0070] The above are merely optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A magnetically assisted electrode structure, characterized in that: include: A fixing seat, a discharge bead made of a conductive material, and a positioning mechanism connected to the fixing seat, wherein the fixing seat defines a receiving hole, the receiving hole having a discharge hole located in the fixing seat, and a plurality of discharge beads are disposed in the receiving hole; the positioning mechanism has a locked state and an unlocked state for each discharge bead; when the positioning mechanism is in the locked state, the discharge beads are sequentially electrically connected and arranged in the receiving hole, with one discharge bead partially exposed at the discharge hole; when the positioning mechanism is in the unlocked state, the connection between any two adjacent discharge beads is released, allowing the discharge beads to completely detach from the receiving hole at the discharge hole; The positioning mechanism is an electromagnet, and the discharge beads are made of magnetic material; When the electromagnet is in a charging state, the positioning mechanism is in a locked state, and the magnetic field generated by the electromagnet acts on each of the discharge beads; when the electromagnet is in a power-off state, the positioning mechanism is in an unlocked state, the magnetic field generated by the electromagnet disappears, and the positioning and connection of each of the discharge beads are released.

2. The magnetically assisted electrode structure according to claim 1, wherein: The discharge beads are arranged linearly in the accommodating hole, and the discharge beads at the end are partially exposed at the discharge hole.

3. The magnetically assisted electrode structure according to claim 1, wherein: The fixing seat is provided with a fixing groove, the positioning mechanism is located in the fixing groove, and the discharge hole and the fixing groove are respectively located at two ends of the accommodating hole.

4. The magnetically assisted electrode structure according to claim 3, wherein: The fixing groove is connected to the accommodating hole, and the discharge bead located at the end abuts against the positioning mechanism.

5. The magnetically assisted electrode structure according to any one of claims 1 to 4, wherein: The fixing seat also has a limiting groove, and the extension direction of the limiting groove is staggered with the extension direction of the accommodating hole. The magnetic-assisted electrode structure also includes a limiting mechanism arranged in the limiting groove, and one end of the limiting mechanism abuts the discharge bead located at the discharge hole.

6. The magnetically assisted electrode structure according to claim 5, wherein: The limiting mechanism includes a limiting column slidably arranged in the limiting groove and an adjusting bolt with one end threadedly connected to the fixing seat, and the other end of the adjusting bolt abuts against the limiting column so that the limiting column presses the discharge bead located at the discharge hole toward the hole wall of the accommodating hole.

7. The magnetically assisted electrode structure according to any one of claims 1 to 4, wherein: The fixing seat is further provided with a feeding hole connected to the accommodating hole. The discharge beads are placed in the feeding hole, and the discharge beads in the feeding hole can slide into the accommodating hole under the action of gravity.

8. The magnetically assisted electrode structure according to any one of claims 1 to 4, wherein: The discharge beads are in spherical, block or cylindrical shapes.

9. A method for replacing an electrode, characterized in that: The steps include: Prepare the magnetic-assisted electrode structure according to any one of claims 1 to 8, wherein the positioning mechanism is in the locked state; Cutting off the connection between the discharge bead and the power supply, switching the positioning mechanism to the unlocked state, and allowing the discharge bead located at the discharge hole to be separated from the receiving hole; Each of the discharge beads in the receiving hole is moved toward the discharge hole to fill a position, and a vacant space is formed in the receiving hole; Installing another discharge bead into the empty space of the receiving hole; The positioning mechanism is switched to the locking state to reposition the discharge beads in the receiving hole.

Images