Contact tube repairing system and method

Abstract

The invention relates to the technical field of contact tube repairing, and discloses a contact tube repairing system and method. A fixing assembly and a clamping assembly are coaxially aligned and spaced by a preset distance; the fixing assembly comprises a fixing part and a plurality of steel needles correspondingly matched with the contact tubes to be repaired; the fixing part is used for fixing the steel needle in the axial direction of the clamping assembly, and the opening degree is adjustable; the pushing assembly is connected with the fixing assembly and is used for driving the fixing assembly to move towards the clamping assembly under the control of the control assembly and sending a steel needle fixed on the fixing assembly and a contact tube to be repaired nested on the steel needle into a preset position in the clamping assembly; and the clamping assembly is used for uniformly applying force inwards in the radial direction to the exterior of the to-be-repaired contact tube under the control of the control assembly so as to compress the aperture of the to-be-repaired contact tube to a proper position, and the steel needle is used for conducting compression limiting in the to-be-repaired contact tube in the process. The contact tube can be efficiently repaired, the repeated utilization rate is increased, and the quality of the repaired contact tube is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of repair of welding tips, and particularly to a welding tip repair system and method. Background Art

[0002] The welding tip of a CO2 shielded arc welding robot for arc welding is a core component for realizing efficient and stable current transmission, and its performance directly determines the processing quality and equipment efficiency.

[0003] During long-term use, due to the continuous friction between the welding tip hole and the welding wire, the aperture gradually becomes larger, which not only causes the position of the welding wire to shift, but also may cause poor conductivity, seriously affecting the welding quality. To improve the service life of the welding tip and reduce the cost brought by frequent replacement of new welding tips, it is usually started from three aspects: optimizing the welding tip material, improving the structural design, and formulating effective maintenance strategies to enhance the durability of the welding tip.

[0004] For the maintenance strategy of the welding tip, common repair methods include physical repair and chemical repair. Physical repair mainly grinds or redrills the worn part by mechanical means in an attempt to restore the original size and shape of the welding tip; however, this method may often change the original size of the welding tip, resulting in a loose fit with the welding wire, thereby affecting the conductivity and the stability of wire feeding. In addition, if repaired multiple times, the size of the welding tip may exceed the allowable tolerance range, resulting in unusability. Moreover, mechanical processing may require professional equipment and technicians, increasing the cost and time of repair. Chemical repair uses specific chemical reagents to treat the surface of the welding tip, aiming to enhance its wear resistance and conductivity, but such methods usually require strict control of operating conditions and may pose environmental pollution risks. No matter which repair method is used, a common problem is faced: how to ensure that the repaired welding tip can maintain good conductivity and mechanical strength for a long time and avoid the situation of aperture expansion or poor conductivity occurring again in the short term.

[0005] Existing repair methods also include repair by welding, that is, using repair welding (such as TIG welding or laser welding) to fill the worn part. This method may introduce new problems during use. For example, the material of the repair welding may have different conductivity from the raw material, resulting in uneven conductivity and affecting the welding quality; the heat affected zone generated during the repair welding may change the properties of the material, such as hardness or toughness, making the repaired welding tip more prone to wear or cracking; in addition, machining is required after repair welding, which also requires precise control of dimensions, otherwise there are also problems with dimensional accuracy. Summary of the Invention

[0006] The present invention aims to provide a welding tip repair system and method, which can efficiently complete the repair of the welding tip, improve the reuse rate of the welding tip, and ensure the quality of the repaired welding tip.

[0007] The basic solution provided by the present invention is: a nozzle repair system, including a control component, a fixing component, a pushing component, and a clamping component that are electrically connected;

[0008] The fixing component is coaxially aligned with the clamping component and spaced a preset distance apart;

[0009] The fixing component includes a fixing part and a number of steel needles that match a number of nozzles to be repaired; the fixing part is used to axially fix the steel needles along the clamping component and the opening degree is adjustable;

[0010] The pushing component is connected to the fixing component and is used to drive the fixing component to move towards the clamping component under the control of the control component, and send the steel needles fixed on the fixing component and the nozzles to be repaired nested on the steel needles into a preset position inside the clamping component;

[0011] The clamping component is used to evenly apply force radially inward along the outside of the nozzle to be repaired under the control of the control component, so as to compress the aperture of the nozzle to be repaired to a suitable position. During the process, the steel needles are used for compression limit inside the nozzle to be repaired.

[0012] Based on a nozzle repair system, the present invention also provides a nozzle repair method, and the method includes:

[0013] S100, install steel needles that match the nozzle to be repaired on the fixing part of the fixing component; nest the nozzle to be repaired on the steel needles, and align the ends of the nozzle to be repaired and the steel needles facing the clamping component;

[0014] S200, the control component activates the safety interlock mechanism for repair, starts the pushing component to drive the fixing component to move towards the clamping component until the nozzle to be repaired is sent into a preset position inside the clamping component, and then stops the pushing component;

[0015] S300, the control component starts the clamping component, and the clamping component evenly applies pressure radially inward along the outside of the nozzle to be repaired according to a preset pressure value and holding time to compress the nozzle to be repaired. During the process, the steel needles perform compression limit inside the nozzle to be repaired;

[0016] S400, after the holding time arrives, the control component stops the clamping component, and the clamping component releases the clamp; starts the pushing component to drive the fixing component to retreat away from the clamping component until the nozzle to be repaired retreats to a preset position, and then stops the pushing component to complete the current repair operation.

[0017] The working principle and advantages of the present invention are as follows:

[0018] Compared with the prior art, this solution integrates control, drive, and execution units to form a complete, efficient, and convenient-to-operate and control electrode tip repair system and method. The overall structure of the system is simple and the layout is compact. It is not only easy to integrate into various application scenarios but also has wide applicability. The fixed components in the system design ensure the stable installation of the electrode tip, providing a solid foundation for subsequent operations. The driving component precisely feeds the electrode tip into the clamping component, ensuring the accuracy and coherence of the operation. The design of the clamping component is particularly crucial. It compresses and repairs the electrode tip by applying uniform pressure, achieving efficient and precise operation. This method of applying uniform pressure can not only effectively restore the original shape and performance of the electrode tip but also avoid problems such as repair failure or poor effect caused by uneven pressure.

[0019] To further improve the repair efficiency and quality, this solution optimizes the structure of the fixed components, thereby changing the fixing method of the electrode tip, that is, steel needles are set inside the electrode tip. There are various models of steel needles, and corresponding models of steel needles are used for each type of electrode tip to be repaired. When the clamping component applies pressure from the outside, the steel needles play a role of compression and limitation inside the electrode tip, assisting in achieving fast and precise repair. This method reduces the number of pressure adjustments and compression cycles that the clamping component needs to perform, simplifies the operation process, and greatly improves the repair efficiency. More importantly, throughout the compression repair process, the steel needles extend into the entire interior of the electrode tip, so the steel needles provide comprehensive support for the electrode tip during the entire repair process, dispersing the external pressure and preventing the electrode tip from being damaged secondary due to excessive local stress. This internal and external combined repair method not only enhances the stability of the repair process but also significantly improves the quality and service life after repair.

[0020] In summary, the application of this solution is of great significance for improving production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Structural schematic diagram of an electrode tip repair system provided by an embodiment of the present invention Figure 1 ;

[0022] Figure 2 Structural schematic diagram of an electrode tip repair system provided by an embodiment of the present invention Figure 2 ;

[0023] Figure 3 Structural schematic diagram of the fixed components provided by an embodiment of the present invention;

[0024] Figure 4 Flow schematic diagram of an electrode tip repair method provided by an embodiment of the present invention;

[0025] The markings in the attached drawings of the specification include: control component 100, fixing component 200, rotating positioning rotor 201, chuck 202, pushing component 300, piston rod 301, clamping component 400, conducting nozzle 500, steel needle 600, operating table 700, and distance adjusting component 800. Detailed Description of the Specific Embodiment

[0026] The following is a more detailed description through specific embodiments:

[0027] The embodiment is basically as shown in the attached Figure 1 and Figure 2 figures: A conducting nozzle repair system, including a control component 100, a fixing component 200, a pushing component 300, and a clamping component 400 that are electrically connected; where Figure 1 is a schematic front view (where the dotted line indicates the axial direction); Figure 2 is a schematic top view (where the dotted line indicates the axial direction).

[0028] The fixing component 200 is coaxially aligned with the clamping component 400 and spaced a preset distance apart;

[0029] The fixing component 200 includes a fixing part and a number of steel needles 600 that are correspondingly matched with a number of conducting nozzles 500 to be repaired; the fixing part is used to axially fix the steel needles 600 along the clamping component 400 and the opening degree is adjustable;

[0030] The pushing component 300 is connected to the fixing component 200 and is used to drive the fixing component 200 to move towards the clamping component 400 under the control of the control component 100 ( Figure 1 in the direction indicated by the arrow), and send the steel needles 600 fixed on the fixing component 200 and the conducting nozzles 500 to be repaired nested on the steel needles 600 into a preset position inside the clamping component 400;

[0031] The clamping component 400 is used to uniformly apply a force radially inwards outside the conducting nozzle 500 to be repaired under the control of the control component 100, so as to compress the aperture of the conducting nozzle 500 to be repaired to a suitable position. During the process, the steel needle 600 is used for compression limit inside the conducting nozzle 500 to be repaired.

[0032] Specifically, in practical applications, an operating table 700 can be set up to install the control component 100, the fixing component 200, the pushing component 300, and the clamping component 400 in a preset manner. In this embodiment, the fixing component 200, the pushing component 300, the clamping component 400, and a part of the control component 100 are installed on the operating table 700; for the convenience of operation, the other parts of the control component 100 can be directly placed beside the operating table 700 due to their large volume and weight; further, the fixing component 200, the pushing component 300, and the control component 100 can be located on the right side of the operating table 700, and the clamping component 400 can be located on the left side of the operating table 700. The overall structure layout is reasonable and compact, and can be reasonably arranged according to the actual application scenario. During the installation process, the positioning pins and positioning grooves are used in cooperation to achieve the precise fixation of each component.

[0033] The control component 100 includes a PLC control system, a driving device for the pushing component 300, and a driving device for the clamping component 400 that are electrically connected to the PLC control system; the driving device for the pushing component 300 includes a servo motor and a solenoid valve; the driving device for the clamping component 400 includes a hydraulic power station with a hydraulic support valve. Among them, each driving device is reasonably arranged according to the connection requirements and the space of the operating table 700 to achieve a compact structure, effective connection, and convenient operation.

[0034] In this embodiment, the pushing component 300 includes a cylinder device, and the piston rod 301 of the cylinder device is coaxially and fixedly connected to the fixing component 200. The cylinder pushing structure can be realized by a conventional method. Under the control of the PLC control system, the piston rod 301 of the cylinder device is driven by a servo motor and a two-position five-way solenoid valve to perform telescopic conversion, so as to realize the in-place movement of the fixing component 200.

[0035] In this embodiment, as Figure 3As shown, the fixing component 200 includes a rotary positioning rotor 201 and a precision chuck 202. The adjustable opening degree of the chuck 202 can fix and clamp steel needles 600 of different models. The overall structure is similar to the clamping structure of an existing pistol drill. It can directly manually rotate the chuck 202, loosen it counterclockwise and tighten it clockwise to fix and replace the steel needle 600, similar to removing the drill bit of a pistol drill. When in use, after the chuck 202 fixes the steel needle 600, the conductive nozzle 500 to be repaired is nested on the steel needle 600. Therefore, the steel needle 600 can be adaptively selected according to the aperture of the conductive nozzle 500 to be repaired, so as to improve the versatility of the system and repair conductive nozzles 500 of various different specifications. When selecting a matching steel needle 600, since the inner diameter of the conductive nozzle 500 must be selected according to the wire diameter, usually, the aperture of the conductive nozzle 500 is about 0.02 mm larger than the wire diameter. Therefore, the outer diameter of the selected matching steel needle 600 is the same as the required inner diameter of the conductive nozzle 500 after repair. In this embodiment, the length of the conventional conductive nozzle 500 is 20 - 50 mm, and the length of the steel needle 600 can be designed to be 30 - 60 mm. The appropriate length and length difference can avoid ineffective fixing and clamping caused by inappropriate length, and also avoid interference between the installed conductive nozzle 500 and steel needle 600 and the clamping component 400.

[0036] A distance adjustment component 800 is installed between the fixing component 200 and the pushing component 300. The distance adjustment component 800 includes a right-angle frame body. The cylinder device of the pushing component 300 is installed at the upper end of the body to realize the fixed support of the pushing component 300. A through hole is opened at the upper end of the body for the piston rod 301 of the cylinder device of the pushing component 300 to extend out. The fixing component 200 and the piston rod 301 of the cylinder are rigidly connected by using the CO2 shielded arc welding process. Specifically, the rotary positioning rotor 201 and the piston rod 301 are rigidly connected. A slot is opened at the bottom of the body, and at least two fasteners are arranged to match the slot. Correspondingly, matching mounting holes are opened at the corresponding positions of the operation table 700. The positions of the fixing component 200 and the pushing component 300 can be adjusted by adjusting the positions of the fasteners for stable assembly.

[0037] When the fixing component 200 and the clamping component 400 are installed, they need to be strictly coaxially aligned with the help of a centering device to ensure that the conductive nozzle 500 to be repaired and the steel needle 600 installed on the fixing component 200 can be accurately fed along the axis into a preset position inside the clamping component 400 to avoid interference. The preset distance between the fixing component 200 and the clamping component 400 can be 100 - 120 mm. Setting the preset distance appropriately makes the extended length of the conductive nozzle 500 to be repaired and the steel needle 600 outside the fixing component 200 less than the preset distance after the conductive nozzle 500 to be repaired is nested on the steel needle 600, without interference with the clamping component 400 and the distance from the front end of the conductive nozzle 500 to be repaired facing the clamping component 400 to the clamping component 400 is appropriate, ensuring an appropriate feeding and moving distance, avoiding too large a distance and being disturbed during the feeding process, resulting in the conductive nozzle 500 to be repaired being unable to be accurately fed into the clamping component 400 and avoiding secondary damage to the conductive nozzle 500 to be repaired.

[0038] In this embodiment, the clamping component 400 includes a hydraulic three-jaw chuck. A vertical chuck body is adopted, and the movable jaws and the driving device are used in cooperation. The driving device of the clamping component 400 includes a hydraulic power station with a hydraulic support valve. Power is provided by the hydraulic power station, and the piston assembly is pushed by the pressure of the hydraulic oil to drive the three jaws to synchronously expand and contract radially, realizing precise clamping and positioning of the conductive nozzle 500. The hydraulic power station is also connected with a pressure monitoring instrument, and the pressure value applied to the conductive nozzle 500 can be viewed in real time. The hydraulic support valve is equipped with a pressure regulating screw, and the holding pressure value for clamping and compressing the conductive nozzle 500 can be adjusted through the pressure regulating screw.

[0039] Under the control of the control system, the execution process of the hydraulic three-jaw chuck can be referred to: operating the corresponding control valve in the forward direction, the hydraulic oil enters the hydraulic cylinder, pushing the piston to move. The piston drives the central nut to rotate or directly push and pull the jaws, causing the three jaws to synchronously contract inward until the workpiece is firmly clamped. Under the control of the control system, operating the control valve in the reverse direction allows the hydraulic oil to be discharged from the hydraulic cylinder, and the jaws move outward under the action of the return spring or other auxiliary devices to release the workpiece. Under the control of the control system, the clamping component 400 can provide a strong and uniform clamping force and is suitable for workpieces of various sizes and shapes. In addition, due to the use of hydraulic drive, the speed of clamping and releasing is fast and the efficiency is high, greatly improving the production efficiency.

[0040] As Figure 4 shown, based on the above-mentioned conductive nozzle repair system, a conductive nozzle repair method is also provided, including:

[0041] S100, installing a steel needle 600 matching the conductive nozzle 500 to be repaired on the fixing part of the fixing component 200; nesting the conductive nozzle 500 to be repaired on the steel needle 600, and aligning one end of the conductive nozzle 500 to be repaired and the steel needle 600 facing the clamping component 400;

[0042] S200, the control component 100 activates the safety interlock mechanism for repair, starts the pushing component 300 to drive the fixing component 200 to move towards the clamping component 400 until the nozzle 500 to be repaired is sent into a preset position inside the clamping component 400, and then stops the pushing component 300;

[0043] S300, the control component 100 starts the clamping component 400, and the clamping component 400 uniformly presses inward along the radial direction outside the nozzle 500 to be repaired according to a preset pressure value and holding time to compress the nozzle 500 to be repaired. During the process, the steel needle 600 performs compression limit inside the nozzle 500 to be repaired; specifically, the preset pressure value can obtain the initial pressure value adapted to different types of nozzles 500 through multiple operation experiences, so as to reduce the number of pressure adjustments and compression cycles required by the clamping component 400. The nozzle 500 to be repaired is compressed by applying pressure in at least three directions, and the control component 100 controls the force deviation in each direction within a preset range.

[0044] S400, after the holding time is up, the control component 100 stops the clamping component 400, and the clamping component 400 releases the clamp; starts the pushing component 300 to drive the fixing component 200 to retreat away from the clamping component 400 until the nozzle 500 to be repaired retreats to a preset position, and then stops the pushing component 300 to complete this repair operation.

[0045] After S400, confirm whether to adjust the pressure value and / or holding time to perform the repair operation again according to the change of the inner diameter of the nozzle 500 after this repair.

[0046] During the application process, the nozzle 500 repair system integrates control, drive and execution units, and the main operation process is as follows, but not limited to this:

[0047] First, the operator coaxially nests the nozzle 500 to be repaired on the positioning steel needle 600 to ensure that the tip of the steel needle 600 precisely touches the front end face of the nozzle 500; the positioning and fixing of the steel needle 600 are completed through the precise cooperation of the rotor and the chuck 202.

[0048] After the initial positioning of the nozzle 500 to be repaired is completed, the operator needs to synchronously trigger the double-start button, the system safety interlock mechanism is activated, and the air cylinder extends linearly along the guide rail to a preset station under the control of the PLC, so as to send the nozzle 500 to be repaired and the steel needle 600 into a preset position in the hydraulic three-jaw chuck. Although the inner diameter of the nozzle 500 to be repaired is enlarged and needs to be repaired, after it is nested on the appropriate steel needle 600, there is still a certain frictional resistance inside. Therefore, at a reasonable moving speed, the nozzle 500 to be repaired can be stable on the steel needle 600 and will not fall off during the process of being sent into the clamping component 400.

[0049] After reaching the position, under the control of the PLC, the hydraulic three-jaw chuck performs a radial clamping action under the regulation of the proportional overflow valve with a preset minimum pressure value, and performs a 9-second pressure holding process according to the set process parameters. After the pressure holding timing is completed, the chuck realizes rapid clamping and unclamping through the control of the electromagnetic reversing valve, and the cylinder then drives the component to return to the initial position to complete this repair operation. During this process, the chuck applies a force to compress the outside of the nozzle 500 to be repaired, and the steel needle 600 compresses and limits the position inside the nozzle 500 to be repaired. Through this radial uniform pressure application and the internal steel needle 600 limiting, the inner diameter of the nozzle 500 is accurately compressed, so that the nozzle 500 restores the guiding function for the welding wire and improves the utilization rate of the nozzle 500.

[0050] After this repair is completed, it enters the detection link. The operator uses a hole diameter measuring instrument to recheck the size of the repaired nozzle 500. If the measured parameters do not meet the process requirements, that is, the change in the inner diameter of the nozzle 500 after this repair does not meet the repair requirements, the pressure holding pressure value for compressing the nozzle 500 is adjusted through the pressure regulating screw of the hydraulic support valve of the hydraulic power station. The pressure regulating screw of the hydraulic support valve can be manually adjusted, and the real-time numerical feedback of the pressure monitoring instrument is observed synchronously to dynamically adjust the pressure holding pressure value of the three-jaw chuck. After multiple rounds of closed-loop debugging and repeated repair operations, until the parameters such as the inner diameter size and clamping accuracy of the nozzle 500 completely meet the equipment operation standards.

[0051] A conductive nozzle repair system and method provided in this embodiment, compared with the prior art, has a simple overall structure and a compact layout. It is not only easy to integrate into various application scenarios but also has wide applicability. The fixed components in the system design ensure that the conductive nozzle can be stably installed, providing a solid foundation for subsequent operations. The driving component precisely feeds the conductive nozzle into the clamping component, ensuring the accuracy and coherence of the operation. The design of the clamping component is particularly crucial. It compresses and repairs the conductive nozzle by applying uniform pressure, achieving efficient and precise operations. This method of applying uniform pressure can not only effectively restore the original shape and performance of the conductive nozzle but also avoid problems such as repair failure or poor effect caused by uneven pressure. To further improve the repair efficiency and quality, steel needles are arranged inside the conductive nozzle. When the clamping component applies pressure from the outside, the steel needles play a role of compression limit inside the conductive nozzle, assisting in achieving rapid and precise repair. This method reduces the number of pressure adjustments and compression cycles required by the clamping component, simplifies the operation process, and greatly improves the repair efficiency. More importantly, during the entire compression repair process, the steel needles extend into the entire interior of the conductive nozzle, thus providing comprehensive support to the conductive nozzle throughout the repair process, dispersing the external pressure, and preventing the conductive nozzle from being damaged again due to excessive local stress. This internal and external combined repair method not only enhances the stability of the repair process but also significantly improves the quality and service life after repair. In summary, the application of this solution is of great significance for improving production efficiency and product quality.

[0052] The above are only embodiments of the present invention. Specific structures and common knowledge such as characteristics that are well-known in the art are not described in detail here. Those of ordinary skill in the art know all the common general technical knowledge in the technical field to which the invention belongs before the application date or priority date, can know all the prior art in this field, and have the ability to apply conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in this application, combine their own abilities to improve and implement this solution. Some typical well-known structures or well-known methods should not become obstacles for those of ordinary skill in the art to implement this application. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A conductive nozzle repair system, characterized in that: It includes a control component, a fixing component, a pushing component and a clamping component which are electrically connected; a fixing assembly, coaxially aligned with the clamping assembly and spaced a preset distance apart; A fixing assembly, comprising a fixing portion and a plurality of steel needles correspondingly matched with a plurality of conductive nozzles to be repaired; A fixing part, used to fix the steel needle along the axial direction of the clamping assembly and the opening can be adjusted; The pushing component is connected to the fixing component, and is used to drive the fixing component to move toward the clamping component under the control of the control component, and to send the steel needle fixed on the fixing component and the conductive nozzle to be repaired nested on the steel needle into a preset position in the clamping component; The clamping component is used to uniformly apply force radially inward on the outside of the conductive nozzle to be repaired under the control of the control component to compress the aperture of the conductive nozzle to be repaired to a suitable position. During the process, the steel needle is used to perform compression and limit inside the conductive nozzle to be repaired.

2. A conductive nozzle repair system according to claim 1, characterized in that: The fixing part includes a rotation positioning rotor and a chuck.

3. A conductive nozzle repair system according to claim 1, characterized in that: The pushing assembly comprises a cylinder device, and the piston rod of the cylinder device is coaxially fixedly connected with the fixing assembly.

4. A conductive nozzle repair system according to claim 1, characterized in that: The clamping assembly includes a hydraulic three-jaw chuck.

5. A conductive nozzle repair system according to claim 1, characterized in that: The control component includes a PLC control system and a pushing component drive device and a clamping component drive device electrically connected to the PLC control system; the pushing component drive device includes a servo motor and a solenoid valve; the clamping component drive device includes a hydraulic power station with a hydraulic support valve.

6. A conductive nozzle repair system according to claim 1, characterized in that: It also includes an operating table for installing a control component, a fixing component, a pushing component and a clamping component in a preset manner; a distance adjustment component is installed between the fixing component and the pushing component.

7. A conductive nozzle repair method, characterized in that: Utilizing a conductive nozzle repair system according to any one of claims 1 to 6, the method comprises: S100, installing a steel needle matching the conductive nozzle to be repaired on the fixing part of the fixing assembly; nesting the conductive nozzle to be repaired on the steel needle, and aligning the conductive nozzle to be repaired and the steel needle toward one end of the clamping assembly; S200, the control component activates the safety interlock mechanism to perform repair, starts the pushing component to drive the fixing component to move toward the clamping component until the conductive nozzle to be repaired is sent to a preset position in the clamping component, and stops pushing the component; S300, the control component starts the clamping component, and the clamping component uniformly applies pressure radially inwardly outside the conductive nozzle to be repaired according to the preset pressure value and pressure holding time to compress the conductive nozzle to be repaired. During the process, the steel needle is compressed and limited inside the conductive nozzle to be repaired; S400, after the holding time is up, the control component stops clamping the component, and the clamping component is released; the pushing component is started to drive the fixing component to move away from the clamping component and back until the conductive nozzle to be repaired returns to the preset position, and the pushing component is stopped to complete the repair operation.

8. A conductive nozzle repair method according to claim 7, characterized in that: In S100, after the conductive nozzle to be repaired is nested in the steel needle, the extension length of the conductive nozzle to be repaired and the steel needle outside the fixed component is less than a preset distance.

9. A conductive nozzle repair method according to claim 7, characterized in that: After S400, it is determined whether to adjust the pressure value and / or the pressure holding time to perform the repair operation again according to the change of the inner diameter of the conductive nozzle after the repair.

10. A conductive nozzle repair method according to claim 9, characterized in that: If the change in the inner diameter of the conductive nozzle after the repair does not meet the repair requirements, adjust the pressure value through the hydraulic support valve of the hydraulic power station in the control component.

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