Rotating head capable of rapidly replacing electrode and perforating machine capable of rapidly replacing electrode

Abstract

The utility model relates to the field of perforating equipment, and provides a rotating head capable of quickly replacing an electrode and a perforating machine capable of quickly replacing the electrode, which comprise an output shaft and a chuck end, the output shaft is provided with a groove part, and the chuck end is matched with the groove part in a quick disassembly and assembly manner, so that the output shaft and the chuck end can be quickly separated or connected. The lower end of the output shaft is connected with the chuck end to form a sealing cavity used for containing a water stop plug, and the height of the sealing cavity in the axial direction of the output shaft is adjustable. The device can adapt to water stoppers of different states and different specifications; when the electrode is thin, the deformation amount of the water stop plug is small, the height of the sealing cavity can be properly adjusted to be low, when the electrode is thick, the water stop plug is stretched to be long, and the height of the sealing cavity can be properly adjusted to be high, so that the water stop plug is exactly contained in the sealing cavity and is in a proper elastic compression force state, the water stop effect is achieved, and the water stop plug cannot be easily damaged. According to the invention, the chuck end and the rotating head output shaft can be quickly disassembled and assembled.

Description

Technical Field

[0001] The utility model relates to the field of perforating equipment, in particular to a quick-change electrode rotating head and a perforating machine capable of quickly replacing electrodes. Background Art

[0002] The electric discharge perforating machine, also known as the electric discharge drilling machine, works by using a thin metal copper tube that moves continuously up and down vertically as an electrode to perform pulsed spark discharge on the workpiece to remove metal and form a shape.

[0003] As the core component of the perforating machine, the rotating head is extremely important during the processing. Especially when changing the electrode and perforating, it is an important factor affecting the processing accuracy and efficiency. Currently, for the perforating machines on the market, when replacing the copper tube, it is necessary to first unscrew the screw tooth sleeve at the chuck end. After replacing the copper tube, the screw tooth sleeve needs to be tightened and fixed. The above-mentioned method of replacing the copper tube has the following problems: During processing, the copper tube is generally consumed within a few minutes. Each time it is consumed, a new copper tube needs to be replaced. With such a high-frequency operation, it is extremely easy to cause irreparable wear to the screw teeth of the output shaft of the rotating head and the screw teeth of the screw tooth sleeve, resulting in a very short service life of the rotating head. Moreover, the time for screwing the screw teeth and replacing the copper tube is long, which affects the overall processing efficiency. The connection method of the screw teeth between the output shaft of the rotating head and the chuck sleeve results in a very poor concentricity between the output shaft of the rotating head and the chuck sleeve. During rotary processing, the copper tube will shake due to non-concentricity, causing the perforating processing speed to slow down, the true roundness of the processed hole to be poor, and it is impossible to process precision holes.

[0004] Even if a quick-connect joint is used to improve the efficiency, the sealing cavity of a general quick-connect joint has a fixed size and cannot adapt to water stop plugs in different states and different specifications. If the water stop plug is too long or the copper tube is relatively thick, it may lead to inability to connect, or even cause the water stop plug to break or shatter easily. If the water stop plug is too short or the copper tube is too thin, after connection, the water stop plug is not in a compressed state or is not sufficiently compressed, then it cannot stop water. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a quick-change electrode rotating head and a perforating machine capable of quickly replacing electrodes, which can enable quick disassembly and assembly between the chuck end and the output shaft of the rotating head, and have a high concentricity, improve the processing accuracy, and can quickly replace electrodes of different specifications and improve the processing efficiency.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is: a quick-change electrode rotating head, comprising: an output shaft and a chuck end. A groove portion is provided on the output shaft, and the chuck end is matched with the groove portion in a manner of being quickly disassembled and assembled, so that the output shaft and the chuck end can be quickly separated or connected. After the lower end of the output shaft is connected to the chuck end, a sealing cavity for accommodating a water stop plug is formed, and the height of the sealing cavity in the axial direction of the output shaft is adjustable.

[0007] The quick-change electrode rotating head in the above solution includes: the groove part is liftable on the output shaft; and / or, an adjusting part is provided on the output shaft, the groove part is arranged on the adjusting part, and the groove part is liftable on the output shaft through the adjusting part; and / or, a guiding inclined surface is provided below the groove part; and / or, the adjusting part is in threaded connection with the output shaft.

[0008] For the quick-change electrode rotating head in the above solution, the chuck end includes a connecting device, and the chuck end is cooperated with the groove part in a quick-disassembly and assembly manner through the connecting device; the connecting device includes a ferrule and a body, and the ferrule and the body are connected through an elastic device.

[0009] For the quick-change electrode rotating head in the above solution, a positioning hole is provided on the body, a sliding part is slidably embedded in the positioning hole, and when the ferrule is loosened or tightened, the sliding part can freely embed in or disengage from the groove part so that the chuck end is connected to or separated from the output shaft of the rotating head; the ferrule is arranged on the outer surface of the body.

[0010] For the quick-change electrode rotating head in the above solution, the sealing cavity is formed in the body of the connecting device; and / or, the water stop plug is an elastic body with a convex first surface and a flat second surface, and the first surface and the second surface are opposite surfaces.

[0011] The quick-change electrode rotating head in the above solution includes: a locking part, the locking part is arranged on the output shaft, and the locking part is used to prevent the position of the groove part from changing during the machining process.

[0012] The quick-change electrode rotating head in the above solution includes: after the sealing cavity is formed, the cylinder at the lower end of the output shaft remains in the sealing cavity, and the ratio of the major axis to the minor axis of the cylinder is greater than 1:1.

[0013] The quick-change electrode rotating head in the above solution further includes a rotating head motor for providing power to the output shaft, and the rotating head motor is one of a hollow shaft motor, a gear drive motor, and a belt drive motor; and / or, the rotating head motor is a variable-speed motor.

[0014] For the quick-change electrode rotating head in the above solution, the output shaft adopts a pair of angular contact bearings, and / or, the output shaft adopts a bearing combination of two deep groove ball bearings and one flat bearing.

[0015] This application also provides a perforating machine with a quick-change electrode, and the perforating machine includes the quick-change electrode rotating head in any of the above solutions.

[0016] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0017] A groove portion is provided on the output shaft in this application. The chuck end is cooperated with the groove portion in a manner that allows for quick disassembly and assembly, so as to form a sealing cavity for accommodating a water stop plug between the output shaft and the chuck end. The height of the sealing cavity in the axial direction of the output shaft is adjustable to adapt to water stop plugs in different states and of different specifications. Even when using water stop plugs of the same specification, when the copper tube electrodes accommodated therein are thinner and thicker, the states of the water stop plugs are different. When the copper tube electrode is thinner, the deformation amount of the water stop plug is smaller, and the height of the sealing cavity can be appropriately lowered; when the copper tube electrode is thicker, the water stop plug is stretched, and the height of the sealing cavity can be appropriately increased. The adjustable height of the sealing cavity is to adapt to the water stop plugs deformed due to accommodating copper tube electrodes of different diameters, so that the water stop plugs can be exactly received in the sealing cavity and are in an appropriate elastic compression force state, playing a role in water stopping without making the water stop plugs vulnerable. This application enables the chuck end and the output shaft of the rotating head to achieve quick disassembly and assembly and have a high concentricity, can better adapt to water stop plugs in different states and of different specifications, make the water stop plugs play a role in water stopping, and realize quick replacement of copper tube electrodes, improving the processing efficiency and processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG Figure 1 is a schematic structural diagram of a quick electrode changing rotating head in an embodiment of the present utility model;

[0019] FIG Figure 2 is a partial schematic structural diagram of a quick electrode changing rotating head in an embodiment of the present utility model;

[0020] FIG Figure 3 is a schematic cross-sectional structural diagram of a quick electrode changing rotating head in an embodiment of the present utility model;

[0021] FIG Figure 4 is a schematic structural diagram of a perforating machine with electrodes that can be quickly replaced in an embodiment of the present utility model.

[0022] Wherein, 1. Groove portion; 101. Guiding inclined surface; 2. Sealing cavity; 3. Adjusting portion; 4. Chuck end; 5. Cylinder; 51. Central channel; 6. Rotating head motor; 7. Water stop plug; 8. Copper tube electrode; 9. Ferrule; 91. Anti-slip member; 10. Elastic device; 11. Locking portion; 12. Connecting device; 121. Positioning hole; 122. Body; 123. Alignment portion; 124. Sliding member; 13. Base; 14. Moving platform; 15. Column; 16. Lifting mechanism; 17. Rotating head; 18. Workpiece fixing mechanism; 19. Guide; 20. Output shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] As Figure 1 , 3 shown, an embodiment of this case provides a quick-change electrode rotating head 17, including: an output shaft 20 and a chuck end 4. A groove portion 1 is provided on the output shaft 20, and the chuck end 4 is matched with the groove portion 1 in a quick-disassembly and assembly manner, so that the output shaft 20 and the chuck end 4 can be quickly separated or connected. After the lower end of the output shaft 20 is connected to the chuck end 4, a sealing cavity 2 for accommodating a water stop plug 7 is formed, and the height of the sealing cavity 2 in the axial direction of the output shaft 20 is adjustable.

[0025] The output shaft 20 is the rotating head output shaft 20; the electrode of the quick-change electrode is the copper tube electrode 8; the sealing cavity 2 is used to accommodate and seal the water stop plug 7.

[0026] When changing the electrode, the copper tube electrode 8 is placed into the water stop plug 7, and then the chuck end 4 is connected and matched with the groove portion 1. The water stop plug 7 fixed with the copper tube electrode 8 is fixed in the sealing cavity 2 matching the water stop plug 7. At this time, the upper and lower parts of the water stop plug 7 are respectively stressed by the output shaft 20 and the chuck end 4, and are in an appropriate elastic compression force state. The water stop plug 7 is sealed, playing a role in water stop without making the water stop plug vulnerable. The copper tube electrode 8 is clamped by the chuck end 4, and the copper tube electrode 8 can be used for processing.

[0027] The shape of the groove portion 1 is a non-threaded annular groove, which can specifically be a circular groove or a circular stepped recess to achieve quick disconnection and connection. The ability to achieve quick disconnection and connection is within the protection scope of this case. The groove portion 1 can be a part of the output shaft 20 and is an annular groove formed on the output shaft 20 in an integrally formed manner, or it can be a component on the output shaft 20, and this component has an annular groove and is detachably connected to the output shaft 20.

[0028] The height of the sealing cavity 2 in the axial direction along the output shaft 20 can be adjusted by adjusting at least one of the position of the groove portion 1 relative to the output shaft 20 or the position of the chuck end 4 relative to the output shaft 20.

[0029] When the groove portion 1 is a part of the output shaft 20 or the groove is integrally formed on the output shaft 20, and at this time the groove portion 1 is immovable relative to the output shaft 20, then the height of the sealing cavity 2 in the axial direction along the output shaft 20 can be adjusted by adjusting the position of the chuck end 4 relative to the output shaft 20. By adjusting the lifting of the bottom end position of the sealing cavity 2, for example, threads are provided on the guiding portion 123, and the guiding portion 123 is connected to the movable part provided at the bottom end of the sealing cavity 2. Adjusting the threads of the guiding portion 123 can achieve the lifting of the movable part, thereby realizing the adjustable height of the sealing cavity 2 in the axial direction along the output shaft 20. Guiding portion 123

[0030] In the present application, a groove portion 1 is provided on the output shaft 20, and the chuck end 4 is detachably and quickly assembled with the groove portion 1, so that a sealing cavity 2 for accommodating the water stop plug 7 is formed between the output shaft 20 and the chuck end 4. The height of the sealing cavity 2 in the axial direction along the output shaft 20 is adjustable to adapt to water stop plugs 7 in different states and different specifications; even when using the same specification of water stop plug 7, when the copper tube electrode 8 accommodated therein is thinner and thicker, the state of the water stop plug 7 is different. When the copper tube electrode 8 is thinner, the deformation amount of the water stop plug 7 is smaller, and the height of the sealing cavity 2 can be appropriately lowered. When the copper tube electrode 8 is thicker, the water stop plug 7 is stretched, and the height of the sealing cavity 2 can be appropriately increased. The adjustable height of the sealing cavity 2 is to adapt to the water stop plug 7 deformed due to accommodating copper tube electrodes 8 with different diameters, so that the water stop plug 7 is just received in the sealing cavity 2 and is in an appropriate elastic compression force state, playing a role in water stop but not making the water stop plug 7 vulnerable. This application can enable the chuck end and the rotating head output shaft 20 to be quickly disassembled and assembled, better adapt to water stop plugs 7 in different states and different specifications, make the water stop plug 7 play a role in water stop, and realize the quick replacement of the copper tube electrode 8, improve the processing efficiency and processing accuracy.

[0031] In one embodiment, the groove portion 1 is vertically movable on the output shaft 20; at this time, the groove portion 1 is a component on the output shaft 20, and this component is detachably connected to the output shaft 20 in a manner that can be adjusted vertically up and down. The shape of the groove portion 1 may not only include a circle of grooves or a circle of stepped recesses to achieve quick disassembly, but also include a portion for adjusting the lifting, such as a thread for adjusting the lifting between the groove portion 1 and the output shaft 20, and a hand-held portion for convenient manual adjustment.

[0032] In another embodiment, an adjusting portion 3 is provided on the output shaft 20, the groove portion 1 is provided on the adjusting portion 3, and the groove portion 1 is vertically movable on the output shaft 20 through the adjusting portion 3; at this time, the height of the sealing cavity 2 in the axial direction along the output shaft 20 can be adjusted by adjusting the position of the groove portion 1 relative to the output shaft 20, and the adjustment of the position of the groove portion 1 relative to the output shaft 20 is achieved by using the adjusting portion 3. The groove portion 1 can be vertically movable on the output shaft 20 through the adjusting portion 3. The advantage of this method is that the adjustment is more flexible and convenient. The groove portion 1 and the adjusting portion 3 can be integrally formed or connected together in other ways. The adjusting portion 3 can be connected to the output shaft 20, and the groove portion 1 is indirectly connected to the output shaft 20 through the adjusting portion 3. In one way, the adjusting portion 3 and the output shaft 20 are in threaded connection, and other connection methods such as slidable connection can also be used. It is convenient to precisely adjust the height of the sealing cavity 2. At the same time, instead of using a quick method to replace the copper tube, when the copper tube is inserted from bottom to top into the chuck and the water stop plug 7, the rotating head 17 is depressurized, that is, the water stop plug 7 is reset to facilitate insertion. At the same time, it realizes the replacement of the copper tube by the threaded disconnection method of the adjusting portion 3 and the replacement of the copper tube by the quick connection method of the groove portion 1, and the two can be freely switched.

[0033] As Figure 2 shown, in a preferred embodiment, a guiding inclined surface 101 is provided below the groove portion 1; this facilitates the insertion of the chuck sleeve into the output shaft 20 of the rotating head.

[0034] In one embodiment, the chuck end includes a connecting device 12, and the chuck end 4 is cooperated with the groove portion 1 in a manner that can be quickly disassembled and assembled through the connecting device 12; the connecting device 12 includes a ferrule 9 and a body 122, and the ferrule 9 and the body 122 are connected through an elastic device 10. The connecting device 12 realizes the quick disassembly and assembly of the chuck end 4 and the groove portion 1.

[0035] In one embodiment, in the quick-change electrode rotating head 17: a positioning hole 121 is provided on the body 122, a sliding member 124 is slidably embedded in the positioning hole 121. When the collet 9 is tightened, the device 10 will generate elastic energy storage, and the sliding member 124 can freely disengage from the groove portion 1, so that the chuck end 4 is separated from the rotating head output shaft 20; the collet 9 is provided on the outer surface of the body 122. The sliding member 124 is a slidable part such as a steel ball or a steel column. When the elastic force generated by the device 10 when the collet 9 is loosened is released, the sliding member 124 can be pushed by the collet 9 and embedded in the groove portion 1 to realize the connection between the chuck end 4 and the rotating head output shaft 20. An anti-slip member 91 can be provided on the periphery of the collet 9; it is convenient to pull up and down when holding by hand. The anti-slip member 91 can be a raised rib, particle or other anti-slip component. The anti-slip member 91 can be integrally formed on the periphery of the collet 9 or independently provided.

[0036] In one embodiment, the sealing cavity 2 is formed in the body 122 of the connecting device 12; that is, the position of the sealing cavity 2 is within the body 122, and the sealing cavity 2 is a cavity.

[0037] In one embodiment, the water stop plug 7 is an elastic body with a convex first surface and a flat second surface. The first surface and the second surface are opposite surfaces. Such a water stop plug 7 facilitates the installation of the copper tube electrode 8, the installation of the water stop plug 7, and better realizes the water stop function after installation. After the water stop plug and the electrode are installed, the convex first surface contacts the output shaft and is elastically abutted by the bottom of the output shaft. The convexity increases the contact area and the sealing effect is better. The flat second surface contacts the chuck end 4 and is parallel to the ground. The copper tube electrode is fixed perpendicular to the second surface. The second surface is flat to make the copper tube electrode fixed in the water stop plug in the vertical direction.

[0038] In one embodiment, the quick-change electrode rotating head includes: a locking portion 11, the locking portion 11 is provided on the output shaft 20, and the locking portion 11 is used to prevent the position of the groove portion 1 from changing during the processing (i.e., during the process of perforating with the copper tube electrode 8). The locking portion 11 can be connected to the groove portion 1. When the adjusting portion 3 is provided, the locking portion 11 can also be connected to the adjusting portion 3. It is to fix the position of the groove portion 1 during the processing, so that the relative position between the groove portion 1 and the output shaft 20 remains unchanged, ensuring that the height change of the sealing cavity 2 caused by the up and down displacement of the groove during frequent replacement of the copper tubes of the same specification will not occur. If it is necessary to adjust the lifting of the groove portion 1 to adjust the height of the sealing cavity 2, the locking portion 11 can be released and unlocked first, and after adjustment, it is connected and locked with the groove portion 1 to prevent the position of the groove portion 1 from changing during the processing.

[0039] In one embodiment, the quick-change electrode rotating head includes: after forming the sealing cavity 2, the cylinder 5 at the lower end of the output shaft 20 is held within the chuck end 4. The cylinder 5 is the part of the output shaft 20 exposed outside the groove portion 1. During the lifting and lowering of the groove portion 1, the length of the cylinder 5 changes with the lifting and lowering of the groove portion 1. However, during the change process, the ratio of the axial length to the outer diameter of the cylinder 5 is maintained greater than 1:1, resulting in higher concentricity and thus improving the machining accuracy. The ratio of the axial length to the outer diameter of the cylinder 5 is more suitable in the range greater than 1:1 and less than 2:1. The larger the ratio of the axial length to the outer diameter, the larger the contact surface between the cylinder 5 and the wall of the sealing cavity 2, and the higher the concentricity between the chuck portion and the output shaft 20. In the prior art, the connection between the output shaft 20 and the screw thread sleeve is relied upon, and the ratio of the axial length to the outer diameter of the output shaft 20 entering the sealing cavity 2 is less than 1:1, with insufficient concentricity and affecting the machining accuracy.

[0040] The interior of the cylinder 5 has a central passage 51 through which the copper tube electrode 8 passes. The radial diameter of the central passage 51 is greater than the radial diameter of the copper tube electrode 8. The ratio of the axial length to the outer diameter refers to the ratio of the axial length of the cylinder 5 to the outer diameter of the cylinder 5. After the lower end of the output shaft 20 is connected to the chuck end 4, a sealing cavity 2 for accommodating the water stop plug is formed between the output shaft 20 and the chuck end 4, that is, a sealing cavity 2 for accommodating the water stop plug is formed between the cylinder 5 at the lower end of the output shaft and the chuck end. The cylinder 5 has a certain thickness. After forming the sealing cavity 2, the upper and lower parts of the water stop plug 7 are respectively stressed by the bottom of the cylinder 5 and the chuck end 4 and are in an appropriate elastic compression force state.

[0041] In one embodiment, the quick-change electrode rotating head further includes a rotating head motor 6 that provides power for the output shaft 20. The rotating head motor 6 is one of a hollow shaft motor, a gear drive motor, and a belt drive motor; and / or, the rotating head motor 6 is a variable speed motor.

[0042] In one embodiment, the output shaft 20 employs a pair of angular contact bearings, and the pair of angular contact bearings are respectively located at the upper and lower ends of the output shaft 20. Using angular contact bearings can prevent the up-and-down and left-and-right vibrations of the shaft.

[0043] In one embodiment, the output shaft 20 adopts a bearing combination of two deep groove ball bearings and one flat bearing. The two deep groove ball bearings are respectively located at the upper and lower ends of the output shaft 20, and one flat bearing is arranged between the two deep groove ball bearings to prevent the output shaft 20 from moving up and down. Deep groove ball bearings can only prevent left-and-right forces and cannot prevent up-and-down movement. By adopting a bearing combination with one flat bearing added between the two deep groove ball bearings, the up-and-down and left-and-right vibrations of the shaft can be prevented. Otherwise, the rotating head is easily damaged due to the up-and-down movement of the shaft, causing gap discharge between the tungsten carbide alloy seals and resulting in water leakage.

[0044] Such as Figure 4As shown, the embodiment of this case also provides a perforating machine with quickly replaceable electrodes. The perforating machine includes the quick electrode replacement rotating head described in any one of the above embodiments, and the perforating machine further includes a base 13, a moving platform 14, a column 15, and a lifting mechanism 16. A moving mechanism 16 is provided on the column 15, the rotating head 17 is arranged on the moving platform 14, the rotating head 17 has a copper tube electrode 8 for discharging, and further includes a guide 19 for the copper tube electrode 8 to be inserted into. A workpiece fixing mechanism 18 is provided on the moving platform 14, and the guide 19 is located between the workpiece fixing mechanism 18 and the rotating head 8. This perforating machine has the characteristics described by the quick electrode replacement rotating head in each of the above embodiments, can achieve quick electrode replacement, and supports high-efficiency and high-precision machining.

[0045] The above embodiments are only for explaining the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A quick-change electrode rotating head, characterized in that, Comprising: An output shaft and a chuck end. A groove portion is provided on the output shaft. The chuck end is cooperated with the groove portion in a quick detachable and installable manner, so that the output shaft and the chuck end can be quickly separated or connected. After the lower end of the output shaft is connected to the chuck end, a sealing cavity for accommodating a water stop plug is formed, and the height of the sealing cavity in the axial direction of the output shaft is adjustable.

2. The quick electrode replacement rotary head according to claim 1, wherein, Comprising: The groove portion is vertically movable on the output shaft; and / or, an adjusting portion is provided on the output shaft, the groove portion is provided on the adjusting portion, and the groove portion is vertically movable on the output shaft through the adjusting portion; and / or, a guiding inclined surface is provided below the groove portion; and / or, the adjusting portion is in threaded connection with the output shaft.

3. The quick electrode replacement rotary head according to claim 1, characterized in that, The chuck end includes a connecting device, and the chuck end is cooperated with the groove portion in a detachable manner through the connecting device; the connecting device includes a ferrule and a body, and the ferrule and the body are connected through an elastic device.

4. The quick-change electrode rotating head according to claim 3, characterized in that, A positioning hole is provided on the body, and a sliding member is slidably embedded in the positioning hole. When the ferrule is loosened or tightened, the sliding member can freely embed in or disengage from the groove portion, so that the chuck end is connected to or separated from the output shaft; the ferrule is provided on the outer surface of the body.

5. The quick-change electrode rotating head according to claim 3, wherein, The sealing cavity is formed in the body of the connecting device; and / or, the water stop plug is an elastic body with a convex first surface and a flat second surface, and the first surface and the second surface are opposite surfaces.

6. The quick-change electrode rotating head according to claim 1, characterized in that, Comprising: A locking portion, which is provided on the output shaft and is used to prevent the position of the groove portion from changing during the processing.

7. The quick-change electrode rotating head according to claim 1, wherein Comprising: After the sealing cavity is formed, the cylinder located at the lower end of the output shaft remains in the sealing cavity, and the ratio of the major axis to the minor axis of the cylinder is greater than 1:

1.

8. The quick-change electrode rotating head according to claim 1, wherein It further includes a rotary head motor for providing power to the output shaft, and the rotary head motor is one of a hollow shaft motor, a gear transmission motor, and a belt transmission motor; and / or, the rotary head motor is a variable speed motor.

9. The quick electrode replacement rotary head according to claim 1, characterized in that, The output shaft adopts a pair of angular contact bearings, and / or, the output shaft adopts a bearing combination of two deep groove ball bearings and one flat bearing.

10. A perforating machine with electrodes that can be quickly replaced, characterized in that, The perforator includes the quick-change electrode rotary head according to any one of claims 1-9.

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