CN214978345U - Lamp wire welding tool and device - Google Patents

Abstract

The utility model provides a weld filament frock and equipment for the filament of welding magnetron cathode assembly, cathode assembly still includes the side tube, the side tube include the connection pad with the connecting pipe, it sets up supporting part, bulge loop and mounting groove to weld the filament frock, the bulge loop with the side tube carries out location coordination, through the supporting part with the mounting groove is right cathode assembly fixes. Compared with the prior art, the welding filament tool and the welding filament equipment of the utility model have the advantages that the support and the limit function are provided for the cathode component, so that the cathode component is stable in the transportation process, and the cathode component is ensured to obtain a closed loop with stable performance, thereby being beneficial to improving the yield of the magnetron; the setting of mounting groove provides installation space for the negative pole subassembly on the one hand, and the setting of on the other hand mounting groove is convenient for cooperate with the ejector pin in the welding furnace body to make the ejector pin top the negative pole subassembly to the welding coil in.

Description

Lamp wire welding tool and device

Technical Field

The utility model relates to a magnetron field particularly, relates to a weld filament frock and equipment.

Background

As is well known, a continuous wave magnetron is a re-entry resonant type quadrature field oscillator, which is a high power source in microwave technology.

The magnetron structure in the prior art is shown in fig. 1 and comprises an anode assembly, a cathode assembly, a magnetic pole and a microwave emitter, wherein the anode assembly and the cathode assembly form a tube core, the anode assembly comprises an anode cylinder, two ends of the anode cylinder are respectively provided with an upper magnetic pole shoe and a lower magnetic pole shoe, an anode plate is arranged at the inner center, and the upper end surface and the lower end surface of the anode plate respectively form an asymmetric cavity with the end surfaces of the upper magnetic pole shoe and the lower magnetic pole shoe. Among them, the cathode assembly is an important component of the magnetron, and the cathode assembly is an electron source for maintaining the electrons to oscillate continuously. As shown in fig. 2 to 3, the cathode assembly 1 includes a side tube 11, a support 13, a terminal 12, a long lead 14, a short lead 15, a lower end cap 16, a filament 18, and an upper end cap 19.

In the prior art, components such as a cathode assembly side tube 11, a support 13, a terminal 12, a long lead 14, a short lead 15, a lower end cap 16 and the like are generally preassembled in advance in the magnetron industry, and then the preassembled cathode assembly is transported into a high-frequency welding machine to fix two ends of a filament with the upper end cap and the lower end cap respectively in a welding mode.

If the circumstances such as rock appear in the negative pole subassembly in the transportation, can make the filament take place slight displacement, this makes the filament after the brazing be difficult to obtain the closed circuit of stable performance to be unfavorable for improving the yields of magnetron. How to stably transport a cathode assembly is a problem to be solved urgently in the field of magnetrons.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a weld filament frock and equipment to the problem of rocking appears in the transportation negative pole subassembly among the solution prior art.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a weld filament frock for the filament of welding magnetron cathode assembly, cathode assembly still includes the side tube, the side tube include the connection pad with the connecting pipe, weld the filament frock and set up supporting part, bulge loop and mounting groove, the supporting part with the bulge loop with the side tube carries out location fit, through the supporting part with the mounting groove is right cathode assembly fixes. The supporting part and the convex ring arranged on the filament welding tool provide supporting and limiting effects for the cathode assembly, so that the cathode assembly is stable in the transportation process, a closed loop with stable performance is ensured to be obtained by the cathode assembly, and the yield of the magnetron is improved; the setting of mounting groove provides installation space for the negative pole subassembly on the one hand, and the setting of on the other hand mounting groove is convenient for cooperate with the ejector pin in the welding furnace body to make the ejector pin top the negative pole subassembly to the welding coil in.

Further, the welding filament tool is provided with a working end face and a connecting face, the working end face is arranged above the supporting portion, the connecting face is arranged below the supporting portion, and the convex ring and the mounting groove are arranged on the working end face. The setting of working end face provides the supporting role to the negative pole subassembly, prevents that in the transportation, the negative pole subassembly takes place the displacement.

Further, the supporting part and the convex ring of the welding filament tool form a step, the step comprises a working end face and a step face, the working end face is attached to the disc bottom face of the connecting disc, and the step face is attached to the disc side face of the connecting disc. The working end face is arranged in a fit mode with the bottom face of the disc, the step face is arranged in a fit mode with the side face of the disc, supporting and limiting effects are provided for the cathode assembly, and the cathode assembly is prevented from displacing in the transportation process.

Furthermore, the convex ring is arranged on the outer circumference of the working end face, the convex ring extends towards the direction far away from the connecting face, and the height of the bulge of the convex ring is larger than that of the disc side face of the connecting disc. The height that the bulge loop extends is greater than the height of dish side, and it is spacing further to carry out the negative pole subassembly, prevents in the transportation that the negative pole subassembly appears rocking.

Further, set up in the center of work terminal surface the mounting groove, the mounting groove orientation is close to the direction of connecting the face extends, the inner wall of mounting groove with the connecting pipe laminating sets up. The installation groove provides an installation space for the cathode assembly.

Further, the mounting groove is provided as a through hole. The mounting groove is convenient for the ejector pin cooperation in the welding furnace body for the setting of through-hole to make the ejector pin with negative pole subassembly top to the welding coil in.

Further, set up on the bulge loop and dodge the groove, dodge the groove orientation weld the sunken formation in below of filament frock. The arrangement of the avoiding groove is convenient for operators to take and place the cathode assembly, and the welding efficiency is improved.

Further, a connecting plate is arranged on the supporting portion, and a connecting hole is formed in the connecting plate. The arrangement of the connecting plate and the connecting hole facilitates installation of the filament welding tool.

A lamp wire welding device uses any one of the above lamp wire welding tools.

Further, the lamp filament welding equipment comprises a conveying device, a driving device, a welding furnace body and a heating device, wherein the conveying device conveys a cathode assembly to the welding furnace body, the driving device drives the cathode assembly to reach a welding coil to complete welding of a lamp filament under the cooperation of the heating device, the welding furnace body comprises a first furnace body and a second furnace body, the first furnace body is arranged at two ends of the second furnace body, one end of the first furnace body, which is connected with the conveying device, is a first end, one end of the first furnace body, which is connected with the welding furnace body, is a second end, and the height of the second end is larger than that of the first end, so that the welding furnace body is in a structure that the first furnace body inclines towards the second furnace body. The first furnace body is arranged towards the second furnace body in an inclined structure, and the protective gas is better sealed in the welding space at the upper part of the furnace body by utilizing the characteristic that the protective gas is lighter than air, so that when the cathode assembly is jacked up by the jacking rod for welding, the filament is fully protected and cannot be oxidized; the height that highly is greater than first end of the second end of first furnace body, the structure setting of first furnace body to the second furnace body slope in the middle of for doing the slope upward movement in first furnace body before the welding of negative pole subassembly, will use horizontal conveyer to adopt vertical conveyer to become the slope of one step of targetting in place earlier and upwards transport, on the one hand, simplified the structure of welding filament equipment, reduce the cost of welding filament equipment, on the other hand, shortened the transportation distance, improved welding efficiency.

Further, the second end is set as a welding station for welding the furnace body. The second end is set as the welding station of the welding furnace body, so that the transportation distance is shortened, and the welding efficiency is improved.

Further, a first pipe is arranged on the first end, and the first pipe is a nitrogen pipeline. The nitrogen pipeline is used for separating air from hydrogen gas in the first furnace body.

Furthermore, a second pipe is arranged on the first furnace body, a third pipe is arranged on the second furnace body, and the second pipe and the third pipe are both hydrogen pipelines. The arrangement of the hydrogen pipeline is used for protecting the lamp filaments in the first furnace body and the second furnace body.

Compared with the prior art, a weld filament frock and equipment have following beneficial effect:

1) the lamp wire welding tool and the equipment of the utility model have the advantages that the supporting part and the convex ring provide supporting and limiting functions for the cathode component, so that the cathode component becomes stable in the transportation and welding processes, and the cathode component is ensured to obtain a closed loop with stable performance, thereby being beneficial to improving the yield of the magnetron;

2) welding filament frock and equipment, the setting up of mounting groove provides installation space for the negative pole subassembly on the one hand, the setting up of on the other hand mounting groove be convenient for with the welding furnace internal ejector pin cooperation to make the ejector pin push up the negative pole subassembly in to the welding coil.

Drawings

FIG. 1 is a schematic cross-sectional view of a magnetron in the prior art;

fig. 2 is a schematic structural diagram of a cathode assembly according to an embodiment of the present invention;

fig. 3 is a schematic bottom exploded view of a cathode assembly without a filament and an upper end cap in accordance with an embodiment of the present invention;

fig. 4 is a schematic perspective view of a welding filament tool according to an embodiment of the present invention;

fig. 5 is a schematic top view of a wire welding fixture according to an embodiment of the present invention;

fig. 6 is a schematic perspective view of a device for welding a filament according to an embodiment of the present invention;

fig. 7 is a schematic top view of a device for welding a filament according to an embodiment of the present invention;

fig. 8 is a schematic view of a device for welding filaments according to an embodiment of the present invention;

description of reference numerals:

1. a cathode assembly; 11. a side tube; 111. a connecting disc; 1111. a tray bottom surface; 1112. a disc side; 112. a connecting pipe; 12. a terminal; 13. a support; 14. a long lead; 15. a short lead; 16. a lower end cap; 17. a solder plate; 171. a reflective plate; 18. a filament; 19. an upper end cap; 2. welding a lamp wire tool; 21. a support portion; 210. a working end face; 211. a connecting surface; 22. a convex ring; 220. a step surface; 23. an avoidance groove; 24. mounting grooves; 25. a connecting plate; 251. connecting holes; 4. welding the furnace body; 41. a first furnace body; 411. a first end; 412. a first tube; 413. a second end; 414. a second tube; 42. a second furnace body; 421. a third tube; 5. a heating device; 6. a conveying device; 7. a drive device.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The descriptions of "first", "second", etc. mentioned in the embodiments of the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 2 to 3, the cathode assembly 1 includes a side tube 11, a support 13 provided below the side tube 11, and a terminal 12 connected to a lower portion of the support 13. One end of the terminal 12 is fixed to the reflection plate 171 of the support 13, and the other end extends downward beyond the support 13. A long lead 14 and a short lead 15 are arranged in the side tube 11, the lower ends of the long lead 14 and the short lead 15 are connected to the support body 13, the other ends of the long lead 14 and the short lead 15 penetrate through the side tube 11 to extend upwards, the length of the outward extension of the long lead 14 is larger than that of the outward extension of the short lead 15, a lower end cap 16 is arranged at the top end of the short lead 15, and the long lead 14 penetrates through the lower end cap 16 to extend upwards.

Further, a filament 18 is sleeved on the upper end of the long lead 14, the bottom of the filament 18 is mounted inside the lower end cap 16, an upper end cap 19 is mounted on the top of the long lead 14, and the filament 18 and the upper end cap 19 are fixed by the upper end cap 19.

Further, the side tube 11 includes a connection pad 111 and a connection tube 112, wherein the connection tube 112 is provided in an upwardly protruded and extended structure, the connection pad 111 is connected to the top of the connection tube 112, and the connection pad 111 has a diameter larger than that of the connection tube 112, and the connection pad 111 is connected to the lower portion of the anode cylinder such that the long lead 14 passes through the anode cylinder, thereby achieving the connection of the cathode assembly 1 to the anode cylinder.

Further, in order to ensure stable connection between the support body 13 and the side pipe 11 during assembly, a welding material plate 17 is arranged between the support body 13 and the side pipe 11, and after assembly, different parts are tightly connected through welding.

Further, the cathode assembly 1 assembling process comprises the following steps:

s1: preassembly between the pre-assembly member and the cathode assembly mold;

s2: welding and removing the mold;

s3: leak detection is carried out;

s4: installing a filament 18 and an upper end cap 19, and welding and fixing the filament 18 and the upper end cap 19;

s5: carbonizing the filament 18;

s6: and (5) resistance detection and titanium powder coating.

The pre-assembly components include the lower end cap 16, the short lead 15, the long lead 14, the reflective plate 171, the side tube 11, the solder plate 17, the support 13, and the terminal 12.

Further, step S4 includes:

s41: sleeving a filament 18 on the long lead 14, wherein one end of the filament 18 is abutted against the lower end cap 16;

s42: sleeving the upper end cap 19 on the long lead 14, wherein the upper end cap 19 is abutted against the other end of the filament 18;

s43: welding the upper end cap 19 to the long lead 14;

s44: projection, adjusting the lead wires on the upper end cap 19 and the lower end cap 16 and the filament 18 according to the projection condition;

s45: the two ends of the filament 18 are respectively welded and fixed with the upper end cap 19 and the lower end cap 16.

Example 1

On the basis of the structure of the cathode assembly, the application provides a filament welding tool, as shown in fig. 2-5, which is used for welding a filament 18 of a magnetron cathode assembly 1, and two ends of the filament 18 are respectively welded and fixed with an upper end cap 19 and a lower end cap 16. Welding filament frock 2 sets up supporting part 21, bulge loop 22 and mounting groove 24, bulge loop 22 with side tube 11 carries out location fit, through supporting part 21 with mounting groove 24 is right negative pole subassembly 1 is fixed. The supporting part and the convex ring arranged on the filament welding tool provide supporting and limiting effects for the cathode assembly, so that the cathode assembly is stable in the transportation process, a closed loop with stable performance is ensured to be obtained by the cathode assembly, and the yield of the magnetron is improved; the setting of mounting groove provides installation space for the negative pole subassembly on the one hand, and the setting of on the other hand mounting groove is convenient for cooperate with the ejector pin in the welding furnace body to make the ejector pin top the negative pole subassembly to the welding coil in.

Specifically, as shown in fig. 4, the filament welding tool 2 is provided with a working end surface 210 and a connecting surface 211, the working end surface 210 is arranged above the supporting portion 21, the connecting surface 211 is arranged below the supporting portion 21, and the convex ring 22 and the mounting groove 24 are arranged on the working end surface 210. The setting of working end face provides the supporting role to the negative pole subassembly, prevents that in the transportation, the negative pole subassembly takes place the displacement.

More specifically, as shown in fig. 3 and 4, the support portion 21 and the protruding ring 22 of the welding filament tool 2 form a step, the step includes a working end surface 210 and a step surface 220, the working end surface 210 is attached to the disc bottom surface 1111 of the connection disc 111, and the step surface 220 is attached to the disc side surface 1112 of the connection disc 111. The working end face is arranged in a fit mode with the bottom face of the disc, the step face is arranged in a fit mode with the side face of the disc, supporting and limiting effects are provided for the cathode assembly, and the cathode assembly is prevented from displacing in the transportation process.

More specifically, as shown in fig. 4, the protruding ring 22 is provided on the working end surface 210, the protruding ring 22 extends in a direction away from the connection surface 211, and the height of the protruding ring 22 is greater than the height of the disk side surface 1112 of the connection disk 111. The height that the bulge loop extends is greater than the height of dish side, and it is spacing further to carry out the negative pole subassembly, prevents in the transportation that the negative pole subassembly appears rocking.

More specifically, as shown in fig. 4, the male ring 22 is provided on the outer circumference of the working end face 210.

More specifically, as shown in fig. 4, the mounting groove 24 is disposed on the working end surface 210, the mounting groove 24 extends toward a direction close to the connection surface 211, and an inner wall of the mounting groove 24 and the connection pipe 112 are attached to each other. The installation groove provides an installation space for the cathode assembly.

More specifically, as shown in fig. 4, the mounting groove 24 is provided at the center of the working end surface 210.

More specifically, as shown in fig. 4 and 5, the mounting groove 24 is provided as a through hole. The mounting groove is convenient for the ejector pin cooperation in the welding furnace body for the setting of through-hole to make the ejector pin with negative pole subassembly top to the welding coil in.

More specifically, as shown in fig. 4, an avoiding groove 23 is formed in the protruding ring 22, and the avoiding groove 23 is formed by being recessed toward the lower side of the welding filament tool 2. The arrangement of the avoiding groove is convenient for operators to take and place the cathode assembly, and the improvement of the working efficiency is facilitated.

More specifically, as shown in fig. 4, the escape groove 23 is provided on the upper end surface of the male ring 22. The shape of the avoiding groove 23 is set to be a semicircular arc shape, and the avoiding groove 23 is symmetrically arranged on the convex ring 22. The shape of the avoiding groove is semicircular arc, the avoiding groove is symmetrically arranged on the convex ring, the operation personnel can conveniently take and place the cathode assembly by hands, and the improvement of the working efficiency is facilitated.

More specifically, as shown in fig. 4, the number of the avoidance slots 23 is not limited, and preferably, as shown in fig. 4, the number of the avoidance slots 23 is set to 4.

More specifically, as shown in fig. 4 and 5, a connection plate 25 is provided on the support portion 21, and a connection hole 251 is provided on the connection plate 25. The arrangement of the connecting plate and the connecting hole facilitates installation of the filament welding tool.

More specifically, as shown in fig. 5, the connection plate 25 is provided on the side surface of the support portion 21 at an end near the connection surface 211, and the connection plate 25 extends toward a direction away from the mounting groove 24. The connecting plate is arranged, so that the mounting area of the supporting part is increased, and the tool is guaranteed to have enough supporting force. The number of the connection holes 251 is not limited, and preferably, as shown in fig. 5, the number of the connection holes 251 is set to 4.

Compared with the prior art, the welding wire tool has the following beneficial effects:

1) according to the filament welding tool, the supporting part and the convex ring provide supporting and limiting effects for the cathode assembly, so that the cathode assembly is stable in the transportation and welding processes, a closed loop with stable performance is obtained for the cathode assembly, and the yield of a magnetron is improved;

2) this embodiment weld filament frock, the setting up of mounting groove provides installation space for the negative pole subassembly on the one hand, the setting up of on the other hand mounting groove be convenient for with the welding furnace internal ejector pin cooperation to make the ejector pin with the negative pole subassembly top to the welding coil in.

Example 2

A lamp wire welding device uses any one of the above lamp wire welding tools.

Specifically, as shown in fig. 6 to 8, the apparatus for welding a filament 18 of a magnetron cathode assembly 1, the filament welding equipment comprises a conveying device 6, a driving device 7, a welding furnace body 4 and a heating device 5, wherein the conveying device 6 is used for conveying the cathode assembly 1 to the welding furnace body 4, under the cooperation of the heating device 5, the driving device 7 drives the cathode assembly 1 to reach the welding coil to complete welding of the filament 18, the welding furnace body 4 comprises a first furnace body 41 and a second furnace body 42, the first furnace body 41 is arranged at two ends of the second furnace body 42, the end of the first furnace body 41 connected with the conveying device 6 is a first end 411, the end of the first furnace body 41 connected with the second furnace body 42 is a second end 413, the height of the second end 413 is greater than that of the first end 411, so that the welding furnace body 4 is formed in a structure that the first furnace body 41 is inclined towards the second furnace body 42. The first furnace body is arranged towards the second furnace body in an inclined structure, and the protective gas is better sealed in the welding space at the upper part of the furnace body by utilizing the characteristic that the protective gas is lighter than air, so that when the cathode assembly is jacked up by the jacking rod for welding, the filament is fully protected and cannot be oxidized; first furnace body sets up to the structure of middle second furnace body slope for the slope upward movement is done in first furnace body before the welding of negative pole subassembly, will use horizontal conveyer earlier and adopt vertical conveyer to become the slope transportation that targets in place one step again, on the one hand, has simplified the structure of welding filament equipment, reduces the cost of welding filament equipment, and on the other hand has shortened the transportation distance, has improved welding efficiency.

Specifically, the second end 413 is set as a welding station for welding the furnace body 4. The second end is set as the welding station of the welding furnace body, so that the transportation distance is shortened, and the welding efficiency is improved.

Specifically, a first pipe 412 is disposed on the first end 411, and the first pipe 412 is a nitrogen pipeline. The nitrogen pipeline is used for separating air from hydrogen gas in the first furnace body.

Specifically, the first furnace body 41 is provided with a second pipe 414, the second furnace body 42 is provided with a third pipe 421, and both the second pipe 414 and the third pipe 421 are hydrogen pipelines. The arrangement of the hydrogen pipeline is used for protecting the lamp filaments in the first furnace body and the second furnace body.

More specifically, the drive means 7 comprise a ram.

In this embodiment, the shielding gas is hydrogen, and the flow rate of the hydrogen is 2-6 m³And h, the heating time is 2-6S, and the good welding of the filament 18, the upper end cap 19 and the lower end cap 16 is ensured so as to meet the resistance requirement before carbonization.

The process of welding the lamp filaments by using the lamp filament welding equipment comprises the following steps:

the method comprises the steps of firstly placing a preassembled cathode assembly 1 on a lamp filament welding tool 2, then conveying the cathode assembly 1 to a first furnace body 41 through a conveying device 6, enabling the cathode assembly 1 to move upwards in the first furnace body 41 in an inclined mode, enabling the cathode assembly 1 to reach a welding station of a welding furnace body 4, enabling an ejector rod of a driving device 7 to penetrate through an installation groove 24 of the lamp filament welding tool 2 to push the cathode assembly 1 in a coil of the welding furnace body 4 under the cooperation of a heating device 5, and enabling welding fluxes at two ends of a lamp filament 18 to be molten to complete welding of the lamp filament 18 with an upper end cap 19 and a lower end cap 16.

Compared with the prior art, the wire welding equipment has the following beneficial effects:

1) according to the lamp filament welding equipment, the height of the second end of the first furnace body is larger than that of the first end, so that the welding furnace body is in a structure that the first furnace body inclines towards the second furnace body, the protective gas is better sealed in the welding space at the upper part of the furnace body by utilizing the characteristic that the protective gas is lighter than air, and when a cathode assembly is jacked up by the ejector rod for welding, a lamp filament can be fully protected and cannot be oxidized;

2) this embodiment the lamp silk equipment of welding, the height that highly is greater than first end of the second end of first furnace body, make the welding furnace body form the structure setting of first furnace body to the slope of second furnace body, thereby make the slope upward movement in first furnace body before the welding of negative pole subassembly, will use horizontal conveyer earlier and adopt vertical conveyer to become the slope that one step targets in place and upwards transport again, on the one hand, the structure of welding lamp silk equipment has been simplified, reduce the cost of welding lamp silk equipment, on the other hand, the transportation route has been shortened, the welding efficiency has been improved.

3) According to the lamp wire welding equipment, the supporting part and the convex ring are arranged on the lamp wire welding tool to support and limit the cathode assembly, so that the cathode assembly is stable in the transportation process, a closed loop with stable performance is ensured to be obtained by the cathode assembly, and the yield of a magnetron is improved;

4) this embodiment weld filament equipment, the setting up of welding filament frock goes up the mounting groove provides installation space for the negative pole subassembly on the one hand, the setting up of on the other hand mounting groove be convenient for with the welding furnace internal ejector pin cooperation to make the ejector pin with the negative pole subassembly top to the welding coil in.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims (10)

1. The utility model provides a weld filament frock for filament (18) of welding magnetron cathode assembly (1), cathode assembly (1) still includes side tube (11), side tube (11) are including connection pad (111) and connecting pipe (112), its characterized in that, weld filament frock (2) and set up supporting part (21), bulge loop (22) and mounting groove (24), bulge loop (22) with side tube (11) carry out location fit, through supporting part (21) with mounting groove (24) are right cathode assembly (1) is fixed.

2. The welding filament tool according to claim 1, wherein the welding filament tool (2) is provided with a working end surface (210) and a connecting surface (211), the working end surface (210) is arranged above the supporting portion (21), the connecting surface (211) is arranged below the supporting portion (21), and the convex ring (22) and the mounting groove (24) are arranged on the working end surface (210).

3. The welding filament tool according to claim 2, wherein the supporting portion (21) and the protruding ring (22) of the welding filament tool (2) form a step, the step comprises a working end surface (210) and a step surface (220), the working end surface (210) is attached to a disc bottom surface (1111) of the connecting disc (111), and the step surface (220) is attached to a disc side surface (1112) of the connecting disc (111).

4. A welding filament tool according to claim 2, wherein the protruding ring (22) is arranged on the outer circumference of the working end surface (210), the protruding ring (22) extends in a direction away from the connection surface (211), and the height of the protrusion of the protruding ring (22) is larger than the height of the disc side surface (1112) of the connection disc (111).

5. The welding filament frock according to claim 2, wherein the mounting groove (24) is arranged at the center of the working end surface (210), the mounting groove (24) extends towards the direction close to the connecting surface (211), and the inner wall of the mounting groove (24) is attached to the connecting pipe (112).

6. A welding filament tool according to claim 5, wherein the mounting groove (24) is provided as a through hole.

7. The welding filament tool according to claim 2, wherein an avoiding groove (23) is formed in the protruding ring (22), and the avoiding groove (23) is formed in a concave manner towards the lower portion of the welding filament tool (2).

8. The welding filament frock according to claim 2, wherein a connecting plate (25) is provided on the supporting portion (21), and a connecting hole (251) is provided on the connecting plate (25).

9. A device for welding a filament, characterized in that a filament welding tool according to any one of claims 1 to 8 is used.

10. The device for welding filament according to claim 9, wherein the device for welding filament comprises a conveying device (6), a driving device (7), a welding furnace body (4) and a heating device (5), the conveying device (6) is used for conveying the cathode assembly (1) to the welding furnace body (4), the driving device (7) drives the cathode assembly (1) to reach the welding wire ring to complete welding filament (18) under the cooperation of the heating device (5), the welding furnace body (4) comprises a first furnace body (41) and a second furnace body (42), the first furnace body (41) is arranged at two ends of the second furnace body (42), one end of the first furnace body (41) connected with the conveying device (6) is a first end (411), one end of the first furnace body (41) connected with the second furnace body (42) is a second end (413), the height of the second end (413) is larger than that of the first end (411), so that the welding furnace body (4) is in a structure that the first furnace body (41) inclines towards the second furnace body (42).

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