Automatic welding device for axial nut capacitor

Abstract

The invention provides an automatic welding device for an axial nut capacitor, and relates to the technical field of component machining. The welding device comprises a rack, a plurality of supporting frames used for conveying capacitors are arranged on the rack in a surrounding mode, and a driving assembly driving the multiple supporting frames to do reciprocating motion is arranged in the rack. A mounting frame is mounted at the top of the rack, a welding channel is formed in the middle of the mounting frame, a conveying frame used for conveying nuts is mounted on one side of the mounting frame, an in-out channel communicated with the conveying frame is formed in the mounting frame, and a pushing mechanism for pushing the nuts to move out of the in-out channel is arranged on the mounting frame. The mounting rack is provided with a limiting mechanism used for limiting the movement of the capacitor, a conveying mechanism used for conveying tin welding rods, and a laser welding head used for melting the tin welding rods; under the combined action of the structures, the capacitor to be welded can be temporarily fixed in the welding channel, so that the nut and the capacitor are coaxial, the welding precision of the nut and the capacitor is improved, and the problems of dislocation and the like after welding are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of component processing, and in particular to a device for automatic welding of axial nut capacitors. Background Art

[0002] A capacitor is an electronic component consisting of two conductors with an insulator (dielectric) sandwiched between them. It is an indispensable electronic component in circuits and plays the role of energy storage, filtering, decoupling, and AC signals.

[0003] During the production, assembly and installation of capacitors, it is necessary to weld the leads, and the existing capacitor lead welding devices mostly rely on manual operation or the assistance of pneumatic components. The above methods have certain problems: first, the leads are manually guided. When loading, when the welder's hands are unstable, the welding points are prone to be skewed, affecting the yield rate of the capacitor; and most lead welding devices do not have a structure that can help clamp and fix the capacitor part, so that during welding, the capacitor part needs to be manually stabilized, which also affects the welding effect. The above method not only leads to low welding efficiency, but also makes it difficult to ensure the accuracy and reliability of lead welding, affecting the qualified rate of the same batch of products. Summary of the invention

[0004] The object of the present invention is to provide a device for automatic welding of axial nut capacitors, which can solve the problems raised by the above-mentioned background technology in view of the shortcomings of the prior art.

[0005] The technical solution of the present invention is achieved in this way:

[0006] The present invention provides an automatic welding device for axial nut capacitors, comprising a frame, a plurality of support frames for transmitting capacitors are arranged around the frame, a driving assembly for driving the plurality of support frames to reciprocate is arranged in the frame; a mounting frame is installed on the top of the frame, a welding channel is arranged in the middle of the mounting frame, a conveying frame for transmitting nuts is arranged on one side of the mounting frame, an inlet and outlet channel connected to the conveying frame is opened on the mounting frame, a propulsion mechanism for pushing the nuts to move in and out of the inlet and outlet channel is arranged on the mounting frame, a limiting mechanism for limiting the movement of the capacitor is arranged on the mounting frame, a transmission mechanism for transmitting tin welding rods is arranged on the mounting frame, and a laser welding head for melting the tin welding rods is arranged on the mounting frame.

[0007] In some technical schemes of the present invention, the driving assembly includes two transmission rollers, both of which are rotatably arranged in a frame, and the two transmission rollers are provided with transmission belts connected end to end, and the support frames are installed on the transmission belts. The frame is provided with a first driving motor that is transmission-connected to any one of the transmission rollers.

[0008] In some technical solutions of the present invention, the propulsion mechanism includes a bracket installed on a frame, a second push rod is installed on the bracket, a displacement seat is provided on the telescopic end of the second push rod, and a through hole adapted to the displacement seat is opened on the side wall of the conveying frame away from the mounting frame, and the through hole is connected to the entry and exit channel.

[0009] In some technical solutions of the present invention, the limiting mechanism includes a first push rod installed on the frame, the installation axis of the first push rod is coaxial with the installation axis of the second push rod, the first push rod and the second push rod are respectively arranged on both sides of the frame, a locking plate is provided on the telescopic end of the first push rod, and a locking groove is opened on the side wall opposite to the locking plate and the capacitor.

[0010] In some technical solutions of the present invention, a limiting mechanism for limiting the nuts from moving one by one to the entry and exit channels is provided on the conveying frame.

[0011] In some technical schemes of the present invention, the limiting mechanism includes a mounting plate rotatably arranged on the outer wall of the conveying frame, a through opening is opened on the outer wall of the conveying frame, a plurality of limit rods are arranged around the outer circumferential wall of the mounting plate, any two adjacent limit rods are placed in the through opening, and any nut is located between any two adjacent limit rods, and an adjustment mechanism for driving the mounting plate to reciprocate is provided on the outer wall of the conveying frame.

[0012] In some technical schemes of the present invention, the positioning mechanism includes a mounting sleeve installed at the lower end of the conveying frame, the mounting sleeve is connected to the entry and exit channels, an adjusting rod is passed through the mounting sleeve, an adjusting disk is provided on the adjusting rod, a guide sleeve is provided perpendicular to the mounting sleeve, a locking rod connected to the adjusting disk is passed through the guide sleeve, an adjusting spring connected to the guide sleeve is provided on the locking rod, a locking disk coaxial with the mounting disk is provided on the end surface of the mounting disk, a plurality of locking grooves are provided on the outer wall of the locking disk, the locking grooves are adapted to the locking rod, a spiral channel is provided on the outer wall of the adjusting rod, a limit block embedded in the spiral channel is provided on the inner wall of the mounting sleeve, and a limit spring connected to the inner wall of the mounting sleeve is provided on the adjusting rod.

[0013] In some technical solutions of the present invention, the laser welding head is tiltedly arranged in the mounting frame.

[0014] In some technical schemes of the present invention, the transmission mechanism includes a rotating bracket installed on a mounting frame, a winding roller is rotatably provided on the rotating bracket, a tin welding rod is wound around the winding roller, the free end of the tin welding rod passes through the mounting frame and is placed in a welding channel, two adjusting rollers that abut against the tin welding rod are rotatably provided in the mounting frame, and a second driving motor that is transmission-connected to one of the adjusting rollers is provided in the mounting frame.

[0015] In some technical solutions of the present invention, a rotating seat is rotatably provided in the entry and exit channel, an outer toothed ring is sleeved on the outer side wall of the rotating seat, an entry and exit hole adapted to the nut is opened in the rotating seat, a second drive motor is provided in the mounting frame, and a transmission gear meshing with the outer toothed ring is provided on the second drive motor.

[0016] Compared with the prior art, the present invention has at least the following advantages or beneficial effects:

[0017] By pushing the nut to move in the inlet and outlet channel through the limiting mechanism and the pushing mechanism, the nut and the capacitor can be made coaxial, the welding accuracy of the two can be improved, and the misalignment problems after welding can be avoided; the mounting frame is provided with a transmission mechanism for transmitting the soldering rod, which can quantitatively transport the corresponding soldering rod to the welding position, and the mounting frame is provided with a laser welding head for melting the soldering rod. The laser welding head melts the soldering rod to weld the nut and the capacitor into a whole, and the melting amount of the solder can be controlled during melting, avoiding the problems of too much or too little soldering during the soldering process, which greatly reduces the probability of residual capacitors; the above structure makes the welding positions of products of the same size and specification uniformly fixed, so that the welding tracks of the same batch of products are consistent, thereby avoiding the action of repeatedly drawing the welding track, greatly improving the production efficiency;

[0018] The joint action of the pushing mechanism and the limiting mechanism can temporarily fix the capacitor to be welded in the welding channel, so that the nut and the capacitor are coaxial, thereby improving the welding accuracy of the two and avoiding problems such as misalignment after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a front view structural schematic diagram of the present invention;

[0022] Figure 3 It is a schematic diagram of the combined structure of the mounting frame and the capacitor in the present invention;

[0023] Figure 4 It is a cross-sectional structural schematic diagram of the mounting frame and the capacitor in the present invention;

[0024] Figure 5It is a cross-sectional structural schematic diagram of the conveying frame and the limiting mechanism in the present invention;

[0025] Figure 6 It is an enlarged structural schematic diagram of the positioning mechanism in the present invention.

[0026] Icons: 1. Frame; 2. Conveyor belt; 3. Support frame; 4. Capacitor; 5. Mounting frame; 6. Conveyor frame; 7. First push rod; 8. Second push rod; 9. Bracket; 10. Conveyor roller; 11. Nut; 12. Locking plate; 13. Mounting plate; 14. Limit rod; 15. Locking rod; 16. Adjustment spring; 17. Mounting sleeve; 18. Guide sleeve; 19. Adjustment plate; 20. Adjustment rod; 21. Entry and exit channel; 22. Spiral channel; 23. Limit block; 24. Positioning plate; 25. Rotating bracket; 26. Winding roller; 27. Tin soldering rod; 28. Laser welding head; 29. ​​Adjusting roller; 30. Displacement seat; 31. Second drive motor; 32. Rotating seat; 33. External gear ring; 34. Locking groove; 35. Limit spring. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example

[0030] Please refer to Figure 1-Figure 6 shown.

[0031] The present invention provides a device for automatic welding of axial nut capacitors, such as Figure 1 , Figure 2As shown in the figure, it includes a frame 1 with a frame structure. A plurality of support frames 3 for transporting capacitors 4 are arranged around the frame 1. The loading area of the support frame 3 adapted to the capacitor 4 is in a 'C' shape and can be adapted to the cylindrical capacitor 4, improving the adaptability of this structure. A driving component for driving the plurality of support frames 3 to reciprocate is arranged inside the frame 1, facilitating the transportation of the capacitor 4 into the welding channel to realize the welding of the capacitor 4 and the nut 11. The top of the frame 1 is bolted with an 'L'-shaped mounting bracket 5. A welding channel is provided in the middle of the mounting bracket 5, and the welding channel is the 'L'-shaped area of the mounting bracket 5. One side of the mounting bracket 5 is provided with a conveying frame 6 for transporting nuts 11. The conveying frame 6 is fixed in a sunk groove opened on the upper side wall of the mounting bracket 5 by bolts. The size of the conveying channel in the conveying frame 6 is adapted to the size of the nut 11, and the cross-section of the conveying channel is rectangular. In this way, a cartridge-type conveying method is formed to successively transport the nuts 11 to the access channel 21. An access channel 21 communicating with the conveying channel of the conveying frame 6 is opened on the mounting bracket 5. The cross-section of the access channel 21 is circular. A propulsion mechanism for pushing the nut 11 out of the access channel 21 is arranged on the mounting bracket 5, facilitating the pushing of the nut 11 placed in the access channel 21 towards the welding end of the capacitor 4. A limiting mechanism for restricting the movement of the capacitor 4 is arranged on the mounting bracket 5. By the limiting mechanism and the propulsion mechanism, the nut 11 is pushed to move in the access channel 21, and the coaxiality of the nut 11 and the capacitor 4 can be realized, improving the welding accuracy of the two and avoiding problems such as misalignment after welding. A transmission mechanism for transporting the solder wire 27 is arranged on the mounting bracket 5, which can quantitatively transport the corresponding solder wire 27 to the welding position. A laser welding head 28 for melting the solder wire 27 is arranged on the mounting bracket 5. By melting the solder wire 27 with the laser welding head 28, the nut 11 and the capacitor 4 are welded into a whole, and the melting amount of the solder during melting can be controlled, avoiding problems such as too much or too little solder during welding, and greatly reducing the probability of defective products of the capacitor 4. Through the above structure, the welding positions of products with the same size specifications are uniformly fixed, and then the welding trajectories of products in the same batch are consistent, thus avoiding the action of repeatedly drawing the welding trajectory many times and greatly improving the production efficiency.

[0032] Preferably, the basic principle of laser welding is to use a laser beam with a high energy density as a heat source. By bombarding the metal surface with the laser beam to form vapor, the evaporated metal can prevent the remaining energy from being reflected by the metal. Laser welding has the characteristics of low heat input, small welding deformation, and not being affected by the electromagnetic field.

[0033] In some technical schemes of the present invention, the driving assembly includes two transmission rollers 10, and the two transmission rollers 10 are rotatably arranged in the frame 1 through pins and bearings. The two transmission rollers 10 are provided with a transmission belt 2 connected end to end, and the transmission belt 2 is a chain-type transmission belt. When it is installed on the two transmission rollers 10, it is in a taut state. The support frame 3 is installed on the transmission belt 2 through a pin and a holder. The frame is provided with a first drive motor that is transmission-connected to any one of the transmission rollers 10. The first drive motor is transmission-connected to the transmission roller 10 through a coupling. Through the above structure, the capacitor 4 loaded on the support frame 3 can be continuously transported to the welding channel, thereby improving the efficiency of welding and the convenience of operation, avoiding frequent human operation, and causing the welding accuracy to be unable to be guaranteed when the nut 11 and the capacitor 4 are welded.

[0034] In some technical schemes of the present invention, the propulsion mechanism includes a bracket 9 installed on the frame 1, the bracket 9 is L-shaped, and is fixed to the outer wall of the frame 1 by bolts. The body of the second push rod 8 is installed on the bracket 9 by a clamp, and a displacement seat 30 is provided on the telescopic end of the second push rod 8 through a bearing rotation. A through hole adapted to the displacement seat 30 is opened on the side wall of the conveying frame 6 away from the mounting frame 5, and the through hole is connected to the inlet and outlet channel 21, so that the bearing 11 to be welded placed in the inlet and outlet channel 21 can be pushed toward the capacitor 4 placed in the welding channel. At this time, the capacitor 4 remains relatively still, and the driving assembly stops driving the support frame 3 to reciprocate until the nut 11 abuts against the end face of the capacitor 4, and the telescopic end of the second push rod 8 stops moving.

[0035] In some technical solutions of the present invention, the limiting mechanism includes a first push rod 7 installed on the frame 1 through a clamp and a bolt, the installation axis of the first push rod 7 is coaxial with the installation axis of the second push rod 8, the first push rod 7 and the second push rod 8 are respectively arranged on both sides of the frame 1, and a positioning disk 24 is provided on the telescopic end of the first push rod 7 through a bearing rotation, and a positioning groove is provided on the side wall opposite to the positioning disk 24 and the capacitor 4. Through the above structure, when the second push rod 8 pushes the bearing 11 to be welded in the inlet and outlet channel 21 to the capacitor 4 placed in the welding channel, the first push rod 7 is immediately started and the positioning disk 24 is also pushed to the capacitor 4, and during the above movement, the positioning groove on the positioning disk 24 and the end face of the nut 11 are both in contact with the end face of the capacitor 4 at the same time; in this way, the capacitor 4 is prevented from moving horizontally on the support frame 3; through the joint action of the above structure, the capacitor 4 to be welded can be temporarily fixed in the welding channel, so that the nut 11 and the capacitor 4 are coaxial, the welding accuracy of the two can be improved, and the problems of misalignment after the two are prevented.

[0036] Preferably, the second push rod 8 and the first push rod 7 are both electric push rods, which are prior art.

[0037] In some technical solutions of the present invention, the laser welding head 28 is tiltedly arranged in the mounting frame 5 through a universal ball head, which is convenient for adjusting the emission angle of the laser welding head 28 in the later stage. It is convenient for the laser beam emitted by the laser welding head 28 to irradiate the welding point of the nut 11 and the capacitor 4, thereby improving the welding quality of the device when welding the nut 11 and the capacitor 4.

[0038] In some technical schemes of the present invention, the transmission mechanism includes a rotating bracket 25 installed on the mounting frame 5, and a winding roller 26 is rotatably provided on the rotating bracket 25 through a bearing and a rotating shaft. A tin soldering rod 27 is wound on the winding roller 26, which is convenient for the long-term operation of the structure. The free end of the tin soldering rod 27 passes through the discharge channel provided on the mounting frame 5 and enters the welding channel. Two adjusting rollers 29 abutting against the tin soldering rod 27 are rotatably provided in the mounting frame 5, and a second driving motor 31 transmission-connected to one of the adjusting rollers 29 is provided in the mounting frame 5. In this way, the discharge speed of the tin soldering rod 27 can be adjusted so that an appropriate amount of the tin soldering rod 27 is located in the irradiation area emitted by the laser welding head 28, thereby avoiding problems such as too much or too little soldering during the welding process.

[0039] Preferably, the outer circumferential wall of the adjusting roller 29 is provided with concave-convex tooth grooves, which are distributed in a ring shape on the outer circumferential wall of the adjusting roller 29 .

[0040] In some technical solutions of the present invention, a rotating seat 32 is rotatably provided in the inlet and outlet channel 21, and the rotating seat 32 can rotate around the rotation center of the inlet and outlet channel 21. An outer toothed ring 33 is sleeved on the outer side wall of the rotating seat 32. An inlet and outlet hole adapted to the nut 11 is provided in the rotating seat 32. When the nut 11 enters the inlet and outlet hole under the push of the second push rod 8, the nut 11 is matched with the inlet and outlet hole. A second driving motor 31 is provided in the mounting frame 5, and a transmission gear meshing with the outer toothed ring 33 is provided on the second driving motor 31. When the second driving motor 31 drives the rotating seat 32 to make a circular motion through the transmission gear and the outer toothed ring 33, the rotating seat 32 can drive the capacitor 4 preliminarily connected with the nut 11 to make a circular motion in the welding channel, thereby adjusting the subsequent welding position of the nut 11 and the capacitor 4, and gradually improving the welding strength of the nut 11 and the capacitor 4.

[0041] In some technical solutions of the present invention, a limiting mechanism for limiting the nuts 11 from moving one by one to the inlet and outlet channels 21 is provided on the conveying frame 6 .

[0042] In some technical solutions of the present invention, the limiting mechanism includes a mounting plate 13 which is arranged on the outer wall of the conveying frame 6 by rotating the frame body, the frame body and the outer wall of the conveying frame 6 are welded, a rectangular opening in the shape of a long strip is provided on the outer wall of the conveying frame 6, six limiting rods 14 are arranged around the outer circumferential wall of the mounting plate 13, any two adjacent limiting rods 14 are placed in the opening, and their parts are placed in the conveying channel of the conveying frame 6, and any one nut 11 is located between any two adjacent limiting rods 14, and a positioning mechanism for driving the mounting plate 13 to reciprocate is provided on the outer wall of the conveying frame 6. In this way, through the above structure, when the displacement seat 30 on the second push rod 8 retreats into the through hole, the positioning mechanism will adjust the rotation of the mounting plate 13, and the nut 11 at the bottom end of the conveying channel will no longer be restricted by the limiting rod 14, and it will gradually enter the inlet and outlet channel 21 and enter the welding process of the next capacitor 4.

[0043] In some technical solutions of the present invention, the positioning mechanism includes a mounting sleeve 17 mounted on the lower end of the conveying frame 6, the mounting sleeve 17 is threadedly connected to the internal threaded hole opened at the lower end of the conveying frame 6, the mounting sleeve 17 is connected to the inlet and outlet channel 21, an adjusting rod 20 is passed through the mounting sleeve 17, an end of the adjusting rod 20 placed in the inlet and outlet channel 21 is provided with an inclined surface, an adjusting disk 19 is provided on the end of the adjusting rod 20 away from the conveying frame 6, and a guide sleeve 18 perpendicular to the mounting sleeve 17 is provided, and a guide sleeve 18 is passed through the guide sleeve 18 to be connected to the adjusting disk A locking rod 15 connected to 19 is sleeved on the locking rod 15 and an adjusting spring 16 connected to the guide sleeve 18 is provided. A locking plate 12 coaxial with the mounting plate 13 is provided on the end surface of the mounting plate 13. A plurality of locking grooves 34 are provided on the outer wall of the locking plate 12. The locking grooves 34 are adapted to the locking rod 15. A spiral channel 22 is provided on the outer wall of the adjusting rod 20. A limit block 23 embedded in the spiral channel 22 is provided on the inner wall of the mounting sleeve 17. A limit spring 35 connected to the inner wall of the mounting sleeve 17 is sleeved on the adjusting rod 20.

[0044] The working principle of the set adjustment mechanism is as follows: when the displacement seat 30 on the second push rod 8 retreats into the through hole, the displacement seat 30 squeezes the adjustment rod 20 and places the end portion in the inlet and outlet channel 21, so that the adjustment rod 20 gradually retreats into the installation sleeve 17. The adjustment rod 20 moves clockwise in the installation sleeve 17 under the restriction of the spiral channel 22 and the limit block 23. At this time, the adjustment disk 19 pulls the locking rod 15 to move downward in the vertical direction, the adjustment spring 16 and the limit spring 35 are in a compressed state, the end portion of the locking rod 15 withdraws from the locking groove 34, and the nut 11 applies downward pressure to the limit rod 14. force, at this time, the limiting rod 14 will adjust the mounting plate 13 to rotate, at this time, the nut 11 located at the bottom of the conveying channel will no longer be restricted by the limiting rod 14, and it will gradually enter the entry and exit channel 21; at this time, the telescopic end of the second push rod 8 moves a short distance toward the capacitor 4, the adjusting rod 20 is no longer squeezed, the adjusting rod 20 returns to its original position, and the end of the locking rod 15 enters the locking groove 34 to prevent the nut 11 from continuing to fall in the conveying channel, so that the single nut 11 can enter the welding process of the next capacitor 4 in turn, ensuring that the welding of the capacitor 4 by this structure is carried out in an orderly manner.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for automatic welding of axial nut capacitors, characterized in that: The invention comprises a frame (1), wherein a plurality of support frames (3) for transmitting capacitors (4) are arranged around the frame (1), and a driving assembly for driving the plurality of support frames (3) to reciprocate is arranged in the frame (1); a mounting frame (5) is installed on the top of the frame (1), a welding channel is arranged in the middle of the mounting frame (5), a conveying frame (6) for transmitting nuts (11) is arranged on one side of the mounting frame (5), an inlet and outlet channel (21) connected to the conveying frame (6) is opened on the mounting frame (5), a propulsion mechanism for pushing the nuts (11) to move out of the inlet and outlet channel (21) is arranged on the mounting frame (5), a limiting mechanism for limiting the movement of the capacitors (4) is arranged on the mounting frame (5), a transmission mechanism for transmitting tin soldering rods (27) is arranged on the mounting frame (5), and a laser welding head (28) for melting the tin soldering rods (27) is arranged on the mounting frame (5).

2. The automatic welding device for axial nut capacitors according to claim 1 is characterized in that: The driving assembly comprises two transmission rollers (10), the two transmission rollers (10) are rotatably arranged in the frame (1), the two transmission rollers (10) are sleeved with a transmission belt (2) connected end to end, the support frame (3) is installed on the transmission belt (2), and the frame (1) is provided with a first driving motor which is transmission-connected to any one of the transmission rollers (10).

3. The automatic welding device for axial nut capacitors according to claim 1 is characterized in that: The propulsion mechanism comprises a bracket (9) mounted on the frame (1), a second push rod (8) being mounted on the bracket (9), a displacement seat (30) being provided on the telescopic end of the second push rod (8), a through hole matching the displacement seat (30) being provided on the side wall of the conveying frame (6) away from the mounting frame (5), and the through hole being communicated with the inlet and outlet channel (21).

4. The automatic welding device for axial nut capacitors according to claim 3 is characterized in that: The limiting mechanism comprises a first push rod (7) mounted on the frame (1), the mounting axis of the first push rod (7) being coaxial with the mounting axis of the second push rod (8), the first push rod (7) and the second push rod (8) being respectively arranged on two sides of the frame (1), a locking plate (24) being arranged on the telescopic end of the first push rod (7), and a locking groove being arranged on the side wall opposite to the capacitor (4).

5. The automatic welding device for axial nut capacitor according to any one of claims 1 to 4, characterized in that: The conveying frame (6) is provided with a limiting mechanism for limiting the nuts (11) from moving one by one to the inlet and outlet channels (21).

6. The device for automatic welding of axial nut capacitors according to claim 5, characterized in that: The limiting mechanism comprises a mounting plate (13) rotatably arranged on the outer wall of the conveying frame (6); a through opening is provided on the outer wall of the conveying frame (6); a plurality of limiting rods (14) are arranged around the outer circumferential wall of the mounting plate (13); any two adjacent limiting rods (14) are placed in the through opening, and any one of the nuts (11) is located between any two adjacent limiting rods (14); and a positioning mechanism for driving the mounting plate (13) to reciprocate is provided on the outer wall of the conveying frame (6).

7. The automatic welding device for axial nut capacitors according to claim 6 is characterized in that: The positioning mechanism comprises a mounting sleeve (17) mounted on the lower end of the conveying frame (6), the mounting sleeve (17) being communicated with the inlet and outlet passage (21), an adjusting rod (20) being inserted into the mounting sleeve (17), an adjusting disk (19) being provided on the adjusting rod (20), a guide sleeve (18) being perpendicular thereto being provided on the mounting sleeve (17), a locking rod (15) connected to the adjusting disk (19) being inserted into the guide sleeve (18), and an adjusting rod (15) being sleeved on the locking rod (15) connected to the guide sleeve (18). A spring (16), a locking plate (12) coaxial with the mounting plate (13) is provided on the end surface of the mounting plate (13), a plurality of locking grooves (34) are provided on the outer wall of the locking plate (12), the locking grooves (34) are adapted to the locking rod (15), a spiral channel (22) is provided on the outer wall of the adjusting rod (20), a limiting block embedded in the spiral channel (22) is provided on the inner wall of the mounting sleeve (17), and a limiting spring (35) connected to the inner wall of the mounting sleeve (17) is sleeved on the adjusting rod (20).

8. The device for automatic welding of axial nut capacitors according to claim 1, characterized in that: The laser welding head (28) is arranged obliquely in the mounting frame (5).

9. The automatic welding device for axial nut capacitors according to claim 1 is characterized in that: The transmission mechanism comprises a rotating bracket (25) mounted on the mounting frame (5), a winding roller (26) being rotatably provided on the rotating bracket (25), a soldering rod (27) being wound around the soldering rod (26), a free end of the soldering rod (27) passing through the mounting frame (5) and then being placed in the welding channel, two adjusting rollers (29) being rotatably provided in the mounting frame (5) and contacting with the soldering rod (27), and a second driving motor being transmission-connected to one of the adjusting rollers (29) being provided in the mounting frame (5).

10. The automatic welding device for axial nut capacitors according to claim 1, characterized in that: A rotating seat (32) is rotatably provided in the inlet and outlet channel (21), an outer toothed ring (33) is sleeved on the outer side wall of the rotating seat (32), an inlet and outlet hole adapted to the nut (11) is opened in the rotating seat (32), a second drive motor (31) is provided in the mounting frame (5), and a transmission gear meshing with the outer toothed ring (33) is provided on the second drive motor (31).

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