Convenient-to-disassemble coating composite contact tube
By designing the accommodating cavity and the guide wire transition cavity in the conductive nozzle, combined with the self-locking mechanism, it facilitates the disassembly and replacement of the conductive nozzle, solving the problem of blockage and inconvenient replacement of the conductive nozzle, and improving welding accuracy and joint quality.
Patent Information
- Application Number
- CN202421540647.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-02
AI Technical Summary
Existing conductive nozzles are prone to clogging, resulting in poor wire feeding and inconvenient replacement, which affects welding accuracy and joint quality.
A loosely disassembled coated composite conductive nozzle is designed, including a fastening cylinder, a conductive nozzle cap and a self-locking mechanism. By setting a housing cavity and a guide wire transition cavity in the fastening cylinder, the friction resistance of the welding wire is reduced, and the self-locking mechanism is used to achieve convenient disassembly of the conductive nozzle cap.
It effectively solves the problem of wire feeding caused by clogged conductive nozzles, simplifies the replacement process of conductive nozzles, improves welding accuracy and joint quality, and reduces cost and replacement frequency.
Smart Images
Figure CN222754596U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of aluminum alloy welding, in particular to a detachable coated composite conductive nozzle. Background Art
[0002] With the intelligent upgrading of manufacturing industry, welding robots are playing an increasingly important role in modern manufacturing industry and becoming a new trend of future industry. At present, most aluminum and aluminum alloy components have been welded by robots automatically. In order to ensure the high quality and consistency of welds, higher requirements must be placed on the continuous operation of welding robots.
[0003] The conductive nozzle is a consumable part of welding equipment and belongs to welding consumables. It is located at the end of the welding gun. It is a key part in metal arc welding. Its function is to transfer the electric energy of the welding machine to the welding wire to make the welding wire conductive. One of the major factors affecting the continuous operation of welding robots is the blockage of the conductive nozzle.
[0004] Since the conductive nozzle is near the arc high temperature area for a long time, affected by high temperature and wire wear, aluminum chips are easily accumulated in the conductive nozzle through hole during welding, which leads to poor wire feeding and wire feeding stability that cannot meet the requirements of robot automatic welding. In addition, during welding, due to the influence of molten droplet splashing or wire blockage, conventional conductive nozzles are easily welded with welding wires. Conventional conductive nozzles are generally directly connected to the conductive nozzle holder with a threaded interface. When replacing the conductive nozzle, the conductive nozzle needs to be removed and replaced as a whole, which is costly. At the same time, when replacing the conductive nozzle, the welding wire will be twisted when the wrench is used to rotate and disassemble the conductive nozzle, resulting in large disassembly resistance. In addition, the disassembly process is likely to cause the position of the welding gun to change, thus affecting the welding accuracy and joint quality. Utility Model Content
[0005] The main purpose of the utility model is to provide a detachable coated composite conductive nozzle, so as to at least solve the problem that the conductive nozzle in the prior art is easily blocked, resulting in poor wire feeding and inconvenient to disassemble and replace.
[0006] In order to achieve the above-mentioned purpose, the utility model provides a detachable coated composite conductive nozzle, comprising: a fastening tube, a first wire guide hole and a positioning cavity are opened inside the fastening tube along its axial direction, a receiving cavity is formed in the middle section of the first wire guide hole, the diameter of the receiving cavity is larger than the diameter of the two ends of the first wire guide hole, and the front end of the first wire guide hole is connected with the positioning cavity; a conductive nozzle cap, the rear end of the conductive nozzle cap is detachably installed in the positioning cavity, a second wire guide hole is arranged inside the conductive nozzle cap along its axial direction, the second wire guide hole is opposite to and connected with the first wire guide hole; the front end of the conductive nozzle cap is a hemispherical working surface; a self-locking mechanism is arranged on the fastening tube, and the self-locking mechanism is used to clamp or separate with the rear end of the conductive nozzle cap through the positioning cavity so that the conductive nozzle cap can be fixedly installed on the fastening tube or removed from the fastening tube.
[0007] Furthermore, the rear end outer wall of the fastening cylinder is provided with an external thread, the middle outer wall of the fastening cylinder is provided with a clamping portion, and the fastening cylinder is fixedly mounted on the conductive nozzle seat of the welding gun through the external thread.
[0008] Furthermore, the rear end of the first wire guide hole has a tapered wire guide transition cavity, the constricted portion at the front end of the wire guide transition cavity is connected to the rear end of the first wire guide hole, and the open portion at the rear end of the wire guide transition cavity is flush with the rear end surface of the fastening tube.
[0009] Furthermore, the connection between the two ends of the accommodating cavity and the first wire guide hole, the connection between the wire guide transition cavity and the first wire guide hole, and the connection between the second wire guide hole and the first wire guide hole are all chamfered structures.
[0010] Furthermore, the fastening cylinder is provided with a card bead entry and exit hole, which extends along the radial direction of the fastening cylinder and is connected to the positioning cavity, and the rear end of the conductive nozzle cap is provided with an annular limiting groove extending along its circumference. When the rear end of the conductive nozzle cap is installed in the positioning cavity, the annular limiting groove is opposite to the card bead entry and exit hole, and the self-locking mechanism includes: a self-locking sleeve, which is slidably mounted on the outer wall of the fastening cylinder along the axial direction of the fastening cylinder, and the inner wall of the self-locking sleeve is provided with an annular limiting boss; a limiting card bead, which is slidably arranged in the card bead entry and exit hole; wherein the self-locking sleeve has a first sliding position and a second sliding position that slides along the axial direction of the fastening cylinder; when the self-locking sleeve is in the first sliding position, the limiting boss squeezes the limiting card bead so that the limiting card bead is partially embedded in the annular limiting groove to lock the conductive nozzle cap; when the self-locking sleeve is in the second sliding position, the limiting boss is separated from the limiting card bead so that the limiting card bead withdraws from the annular limiting groove to unlock the conductive nozzle cap.
[0011] Furthermore, there are multiple bead entry and exit holes and multiple limiting beads, and the multiple bead entry and exit holes are evenly spaced along the circumference of the fastening cylinder, and the multiple limiting beads are arranged in the multiple bead entry and exit holes in a one-to-one correspondence.
[0012] Furthermore, the self-locking mechanism also includes: a spring, which is sleeved on the outer wall of the fastening cylinder, the rear end of the spring is fixedly connected to the fastening cylinder, and the front end of the spring abuts against the rear end wall of the limiting boss; a limiting ring, which is fixedly sleeved on the outer wall of the fastening cylinder; wherein the self-locking sleeve compresses the spring when it moves from the first sliding position to the second sliding position under the action of external force, and moves from the second sliding position to the first sliding position under the elastic force of the spring when the self-locking sleeve loses the action of external force; the limiting ring is used to abut against the front end wall of the limiting boss when the self-locking sleeve moves to the first sliding position to limit the self-locking sleeve.
[0013] Furthermore, the fastening cylinder is made of copper alloy with silver-plated surface.
[0014] Furthermore, the surface of the conductive nozzle cap has a gradient modified coating with high strength and high wear resistance.
[0015] The detachable coated composite conductive nozzle of the utility model technical solution includes a fastening tube, a conductive nozzle cap and a self-locking mechanism. A first wire guide hole and a positioning cavity are provided inside the fastening tube along its axial direction. A receiving cavity is formed in the middle section of the first wire guide hole. The diameter of the receiving cavity is larger than the diameter of the two ends of the first wire guide hole. The front end of the first wire guide hole is connected with the positioning cavity. The rear end of the conductive nozzle cap is detachably installed in the positioning cavity. A second wire guide hole is provided inside the conductive nozzle cap along its axial direction. The second wire guide hole is opposite to and connected with the first wire guide hole. The front end of the conductive nozzle cap is a hemispherical working surface. The self-locking mechanism is provided on the fastening tube. The self-locking mechanism is used to engage or separate with the rear end of the conductive nozzle cap through the positioning cavity so that the conductive nozzle cap can be fixedly installed on the fastening tube or removed from the fastening tube. First, by forming a larger diameter receiving cavity in the middle section of the first wire guide hole, the friction resistance between the welding wire and the first wire guide hole is reduced, thereby reducing the generation of aluminum chips. At the same time, the dust and aluminum chips generated by the friction between the welding wire, the wire feeding tube and the first wire guide hole can be collected in the accommodating cavity, which solves the problem of gun blocking caused by poor wire feeding and ensures the smooth progress of production operations. Second, when the welding wire and the conductive nozzle cap are welded during welding, only the conductive nozzle cap needs to be replaced, which saves costs; at the same time, the conductive nozzle cap and the fastening tube are self-locking plug-in, and the process of replacing the conductive nozzle cap will not drive the welding wire to twist together, and there is no disassembly resistance. Not only is the disassembly and replacement convenient and quick, but it also effectively improves the welding accuracy and joint quality; third, through the hemispherical working surface design of the front end of the conductive nozzle cap and the material design of the high-strength, high-wear-resistant gradient modified coating, the incidence of welding between the welding wire and the conductive nozzle is significantly reduced, the wear of the conductive nozzle is reduced, and the replacement frequency of the conductive nozzle is reduced, saving costs while improving production efficiency. Fourth, the fastening tube is made of copper alloy with a silver-plated surface. By silver-plating the surface of the fastening tube, the conductivity of the conductive nozzle, the stability of current and voltage, and the welding quality are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of a detachable coated composite conductive nozzle which can be selected according to an embodiment of the utility model;
[0018] Figure 2 It is a cross-sectional assembly diagram of a detachable coated composite conductive nozzle that can be selected according to an embodiment of the utility model;
[0019] Figure 3 It is a cross-sectional exploded view of a detachable coated composite conductive nozzle that can be selected according to an embodiment of the utility model;
[0020] The above drawings include the following reference numerals:
[0021] 10. Fastening cylinder; 11. First wire guide hole; 12. Accommodating cavity; 13. Positioning cavity; 14. Clamping portion; 15. Wire guide transition cavity; 16. Card bead entry and exit hole; 20. Conductive nozzle cap; 21. Second wire guide hole; 22. Annular limiting groove; 30. Self-locking mechanism; 31. Self-locking sleeve; 32. Limiting boss; 33. Limiting card bead; 34. Spring; 35. Limiting ring. DETAILED DESCRIPTION
[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0023] The detachable coated composite conductive nozzle of the embodiment of the utility model comprises a fastening tube 10, a conductive nozzle cap 20 and a self-locking mechanism 30. A first wire guide hole 11 and a positioning cavity 13 are provided inside the fastening tube 10 along its axial direction. A receiving cavity 12 is formed in the middle section of the first wire guide hole 11. The diameter of the receiving cavity 12 is larger than the diameter of the two ends of the first wire guide hole 11. The front end of the first wire guide hole 11 is connected to the positioning cavity 13. The rear end of the conductive nozzle cap 20 is detachably installed in the positioning cavity 13. A second wire guide hole 21 is provided inside the conductive nozzle cap 20 along its axial direction. The second wire guide hole 21 is opposite to and connected to the first wire guide hole 11. The front end of the conductive nozzle cap 20 is a hemispherical working surface. The self-locking mechanism 30 is provided on the fastening tube 10. The self-locking mechanism 30 is used to be connected or separated from the rear end of the conductive nozzle cap 20 through the positioning cavity 13 so that the conductive nozzle cap 20 can be fixedly installed on the fastening tube 10 or removed from the fastening tube 10. First, by forming a larger diameter accommodating chamber 12 in the middle section of the first wire guide hole 11, the friction resistance between the welding wire and the first wire guide hole 11 is reduced, thereby reducing the generation of aluminum chips. At the same time, the dust and aluminum chips generated by the friction between the welding wire, the wire feeding tube and the first wire guide hole 11 can be collected in the accommodating chamber 12, which solves the problem of gun blocking caused by poor wire feeding and ensures the smooth progress of production operations. Second, when the welding wire and the conductive nozzle cap 20 are welded during welding, only the conductive nozzle cap 20 needs to be replaced, which saves costs; at the same time, the conductive nozzle cap 20 and the fastening tube 10 are self-locking plug-in, and the process of replacing the conductive nozzle cap 20 will not drive the welding wire to twist together, and there is no disassembly resistance, which is not only convenient and quick to disassemble and replace, but also effectively improves the welding accuracy and joint quality; third, the hemispherical working surface design of the front end of the conductive nozzle cap 20 and the material design of the high-strength, high-wear-resistant Ti-Cu-N gradient modified coating significantly reduce the incidence of welding between the welding wire and the conductive nozzle, reduce the wear of the conductive nozzle, and reduce the replacement frequency of the conductive nozzle, saving costs while improving production efficiency. Fourthly, the fastening tube 10 is made of a copper alloy with a silver-plated surface. By plating silver on the surface of the fastening tube 10, the conductivity of the conductive nozzle and the stability of the current and voltage are effectively improved, thereby improving the welding quality.
[0024] In specific implementation, the diameters of the first wire guide hole 11 and the second wire guide hole 21 can be selected according to the diameter of the welding wire. Optionally, the diameter of the welding wire can be 1.2 mm, 1.6 mm or 2.0 mm. The rear end outer wall of the fastening cylinder 10 is provided with an external thread, and the fastening cylinder 10 is fixedly installed on the conductive nozzle seat of the welding gun through the external thread; the middle outer wall of the fastening cylinder 10 is provided with a clamping part 14, and the clamping part 14 is a hexagonal nut structure, which is convenient for the tool wrench to clamp and install.
[0025] Furthermore, the rear end of the first wire guide hole 11 has a tapered wire guide transition cavity 15, the front end of the wire guide transition cavity 15 is connected to the rear end of the first wire guide hole 11, and the rear end of the wire guide transition cavity 15 is flush with the rear end surface of the fastening cylinder 10. By providing the tapered wire guide transition cavity 15, the welding wire in the welding gun can smoothly enter the first wire guide hole 11 through the wire guide transition cavity 15.
[0026] Furthermore, the connection between the two ends of the accommodating cavity 12 and the first wire guide hole 11, the connection between the wire guide transition cavity 15 and the first wire guide hole 11, and the connection between the second wire guide hole 21 and the first wire guide hole 11 are all chamfered structures to avoid scratching the connection with the conductive nozzle during the forward movement of the welding wire, which affects the surface quality of the welding wire.
[0027] Furthermore, the fastening cylinder 10 is provided with a bead entry and exit hole 16, which extends radially along the fastening cylinder 10 and is connected to the positioning cavity 13, and the rear end of the conductive nozzle cap 20 is an annular step structure, which matches the positioning cavity 13; an annular limiting groove 22 extending along its circumference is provided on the side wall of the annular step structure, and the cross-section of the annular limiting groove 22 is an arc structure; when the rear end of the conductive nozzle cap 20 is installed in the positioning cavity 13, the annular step structure is inserted into the positioning cavity 13, and at this time, the annular limiting groove 22 is radially opposite to the bead entry and exit hole 16. The self-locking mechanism 30 includes a self-locking sleeve 31 and a limiting bead 33. The self-locking sleeve 31 is slidably mounted on the outer wall of the fastening cylinder 10 along the axial direction of the fastening cylinder 10. The inner wall of the self-locking sleeve 31 is provided with an annular limiting boss 32, and the limiting boss 32 is arranged near the front end of the inner wall of the self-locking sleeve 31; the limiting bead 33 is slidably arranged in the bead inlet and outlet hole 16, and the curvature of the limiting bead 33 matches the curvature and size of the annular limiting groove 22; the self-locking sleeve 31 has a first sliding position and a second sliding position for sliding along the axial direction of the fastening cylinder 10, the first sliding position is the initial position, and when the self-locking sleeve 31 is in the first sliding position, the limiting boss 32 and the limiting The positioning bead 33 is relative to and radially squeezes the limiting bead 33 so that the limiting bead 33 is partially embedded in the annular limiting groove 22, thereby locking the conductive nozzle cap 20 and preventing the conductive nozzle cap 20 from being pulled out from the positioning cavity 13; the second sliding position is the disassembly state position. When the self-locking sleeve 31 is in the second sliding position, the limiting boss 32 is separated from the limiting bead 33, so that the limiting bead 33 withdraws from the annular limiting groove 22 and thereby unlocks the conductive nozzle cap 20. At this time, the conductive nozzle cap 20 can be pulled out of the positioning cavity 13 or re-installed into the positioning cavity 13. When the conductive nozzle cap 20 is installed in the positioning cavity 13, the self-locking sleeve 31 is moved to the first sliding position again to re-lock the conductive nozzle cap 20.
[0028] Furthermore, there are multiple bead entry and exit holes 16 and limit bead 33, and the multiple bead entry and exit holes 16 are evenly spaced along the circumference of the fastening tube 10, and the multiple limit bead 33 are arranged in the multiple bead entry and exit holes 16 in a one-to-one correspondence. By setting up multiple bead entry and exit holes 16 and limit bead 33, the conductive nozzle cap 20 can be locked and unlocked from multiple circumferential points, so that the connection between the conductive nozzle cap 20 and the fastening tube 10 is more stable.
[0029] Furthermore, the self-locking mechanism 30 also includes a spring 34 and a limiting ring 35. The spring 34 is sleeved on the outer wall of the fastening cylinder 10, the rear end of the spring 34 is fixedly connected to the fastening cylinder 10, and the front end of the spring 34 abuts against the rear end wall of the limiting boss 32; the limiting ring 35 is fixedly sleeved on the outer wall of the fastening cylinder 10 and is located on the front side of the limiting boss 32; when performing specific operations, the self-locking sleeve 31 is pulled backward, the self-locking sleeve 31 moves from the first sliding position to the second sliding position and compresses the spring 34. At this time, the limiting boss 32 and the multiple limiting beads 33 are staggered and separated along the axial position, and the multiple limiting beads 33 are separated from the rear end of the conductive nozzle cap 20. The annular limiting groove 22 withdraws and falls into the gap between the self-locking sleeve 31 and the inner wall of the fastening tube 10, thereby unlocking the conductive nozzle cap 20. At this time, the conductive nozzle cap 20 can be pulled out of the positioning cavity 13; after replacing a new conductive nozzle cap 20 and inserting the new conductive nozzle cap 20 into the positioning cavity 13, loosen the self-locking sleeve 31, and the self-locking sleeve 31 returns from the second sliding position to the first sliding position under the action of the rebound force of the spring 34. At this time, the limiting boss 32 is opposite to the limiting bead 33 in the axial position and the limiting bead 33 is squeezed in the radial direction so that the limiting bead 33 is partially embedded in the annular limiting groove 22 of the newly replaced conductive nozzle cap 20, thereby locking the conductive nozzle cap 20. The limiting ring 35 can clamp the self-locking sleeve 31 to limit the position when the self-locking sleeve 31 moves toward the first sliding position to the limit position, thereby ensuring that the limiting boss 32 and the limiting bead 33 are facing and squeezed. Optionally, the limiting ring 35 is an annular stainless steel clamp, which is fastened to the outer wall of the fastening cylinder 1 through a groove, thereby having an interference fit with the limiting boss 32 to prevent the self-locking sleeve 31 from exceeding the limit position under the elastic force of the spring 34.
[0030] Furthermore, the fastening tube 10 is made of a copper alloy with a silver-plated surface. The utility model uses an ultrasonic-assisted cyanide-free electroplating silver process to electroplate the fastening tube. By plating silver on the surface of the fastening tube 10, the conductivity of the conductive tip, the stability of the current and voltage, and the welding quality are effectively improved. In addition, the silver plating process is not limited to electroplating technology, and sputtering coating, vapor deposition coating, chemical replacement and other methods can also be used.
[0031] Furthermore, the surface of the conductive nozzle cap 20 has a high-strength, high-wear-resistant Ti-Cu-N gradient modified coating. The surface modification treatment of the conductive nozzle cap 20 can further reduce the incidence of welding between the welding wire and the conductive nozzle, reduce the wear of the conductive nozzle, reduce the replacement frequency of the conductive nozzle, save costs and improve production efficiency.
[0032] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A detachable coated composite conductive nozzle, characterized in that: include: A fastening tube (10), wherein a first wire guide hole (11) and a positioning cavity (13) are provided inside the fastening tube (10) along the axial direction thereof, a receiving cavity (12) is formed in the middle section of the first wire guide hole (11), the diameter of the receiving cavity (12) is larger than the diameters of the two ends of the first wire guide hole (11), and the front end of the first wire guide hole (11) is communicated with the positioning cavity (13); A conductive nozzle cap (20), wherein the rear end of the conductive nozzle cap (20) is detachably mounted in the positioning cavity (13), and a second wire guide hole (21) is provided inside the conductive nozzle cap (20) along its axial direction, and the second wire guide hole (21) is opposite to and connected to the first wire guide hole (11); the front end of the conductive nozzle cap (20) is a hemispherical working surface; A self-locking mechanism (30) is arranged on the fastening tube (10), and the self-locking mechanism (30) is used to engage or separate with the rear end of the conductive nozzle cap (20) through the positioning cavity (13) so that the conductive nozzle cap (20) can be fixedly installed on the fastening tube (10) or removed from the fastening tube (10).
2. The detachable coated composite conductive nozzle according to claim 1, characterized in that: The rear end outer wall of the fastening cylinder (10) is provided with an external thread, the middle outer wall of the fastening cylinder (10) is provided with a clamping portion (14), and the fastening cylinder (10) is fixedly mounted on the conductive nozzle seat of the welding gun via the external thread.
3. The detachable coated composite conductive nozzle according to claim 1, characterized in that: The rear end of the first wire guide hole (11) has a tapered wire guide transition cavity (15), the constricted portion at the front end of the wire guide transition cavity (15) is connected to the rear end of the first wire guide hole (11), and the open portion at the rear end of the wire guide transition cavity (15) is flush with the rear end surface of the fastening tube (10).
4. The detachable coated composite conductive nozzle according to claim 3, characterized in that: The connection points between the two ends of the accommodating cavity (12) and the first wire guide hole (11), the connection point between the wire guide transition cavity (15) and the first wire guide hole (11), and the connection point between the second wire guide hole (21) and the first wire guide hole (11) are all chamfered structures.
5. The detachable coated composite conductive nozzle according to claim 1, characterized in that: The fastening tube (10) is provided with a bead entry and exit hole (16), the bead entry and exit hole (16) extends along the radial direction of the fastening tube (10) and is communicated with the positioning cavity (13), the rear end of the conductive nozzle cap (20) is provided with an annular limiting groove (22) extending along its circumferential direction, when the rear end of the conductive nozzle cap (20) is installed in the positioning cavity (13), the annular limiting groove (22) is opposite to the bead entry and exit hole (16), and the self-locking mechanism (30) comprises: A self-locking sliding sleeve (31) is slidably mounted on the outer wall of the fastening cylinder (10) along the axial direction of the fastening cylinder (10), and an annular limiting boss (32) is provided on the inner wall of the self-locking sliding sleeve (31); A limit bead (33) is slidably disposed in the bead entry and exit hole (16); The self-locking sleeve (31) has a first sliding position and a second sliding position for sliding along the axial direction of the fastening tube (10); when the self-locking sleeve (31) is in the first sliding position, the limiting boss (32) squeezes the limiting bead (33) so that the limiting bead (33) is partially embedded in the annular limiting groove (22) to lock the conductive nozzle cap (20); when the self-locking sleeve (31) is in the second sliding position, the limiting boss (32) is separated from the limiting bead (33) so that the limiting bead (33) is withdrawn from the annular limiting groove (22) to unlock the conductive nozzle cap (20).
6. The detachable coated composite conductive nozzle according to claim 5, characterized in that: There are a plurality of the bead entry and exit holes (16) and the limiting bead (33), and the plurality of bead entry and exit holes (16) are evenly spaced along the circumference of the fastening cylinder (10), and the plurality of limiting bead (33) are arranged in the plurality of bead entry and exit holes (16) in a one-to-one correspondence.
7. The detachable coated composite conductive nozzle according to claim 5, characterized in that: The self-locking mechanism (30) further comprises: A spring (34), wherein the spring (34) is sleeved on the outer wall of the fastening cylinder (10), the rear end of the spring (34) is fixedly connected to the fastening cylinder (10), and the front end of the spring (34) abuts against the rear end wall of the limiting boss (32); A limiting ring (35) is fixedly sleeved on the outer side wall of the fastening cylinder (10); Wherein, when the self-locking sleeve (31) moves from the first sliding position to the second sliding position under the action of external force, the spring (34) is compressed, and when the self-locking sleeve (31) loses the action of external force, it moves from the second sliding position to the first sliding position under the elastic force of the spring (34); the limiting ring (35) is used to abut against the front end wall of the limiting boss (32) when the self-locking sleeve (31) moves to the first sliding position to limit the self-locking sleeve (31).
8. The detachable coated composite conductive nozzle according to claim 1, characterized in that: The fastening cylinder (10) is made of copper alloy with a silver-plated surface.
9. The detachable coated composite conductive nozzle according to claim 1, characterized in that: The surface of the conductive nozzle cap (20) has a high-strength and high-wear-resistant Ti-Cu-N gradient modified coating.