A double-sided welding device for capacitor core

Abstract

The invention discloses a double-sided welding device for capacitor cores, which relates to the technical field of capacitor processing, and includes: a storage box including a bottom plate, a U-shaped side plate and a cover plate, the cover plate is provided with a first U-shaped groove and a plurality of first through holes, the bottom plate is provided with a second U-shaped groove and a plurality of second through holes, and a U-shaped copper wire is placed in each groove; the conveying tail end of the second conveying platform docks with the support platform, the first conveying platform is used to convey the core to a position corresponding to the support platform, and the second conveying platform is used to convey the storage box to the top of the support platform; a pushing mechanism is arranged on the outside of the first conveying platform, and is used to push a plurality of cores into the storage box at the top of the support platform; the upper welding equipment is used to press the U-shaped copper wire in the cover plate to the top of the core, and its welding gun passes through the corresponding first through hole to weld the U-shaped copper wire at the top of the core; the welding gun of the lower welding equipment passes through the corresponding second through hole to weld the U-shaped copper wire at the bottom of the core. This scheme can automatically arrange the cores and automatically complete the welding of the U-shaped copper wires.

Description

Technical Field

[0001] The invention relates to the technical field of capacitor processing, and in particular to a double-sided welding device for a capacitor core. Background Art

[0002] like Figure 1 The structure shown is a capacitor core row structure, with a U-shaped copper wire welded to the top and bottom of each core. For this row structure, the welding method in the prior art is as follows: manually take four capacitor cores and line them up in a row, place a U-shaped copper wire on the top of the four capacitor cores, hold the four capacitor cores with both hands and press the U-shaped copper wire, and then transfer the whole to the welding equipment to weld the U-shaped copper wire; manually turn over the cores as a whole, and change the bottom of the original core to face upwards, and then complete the welding of another U-shaped copper wire, and the method and steps are the same as above. The above welding method is too dependent on manual labor, resulting in low welding efficiency. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, the present invention provides a double-sided welding device for a capacitor core, which can automatically arrange the core and automatically complete the welding of U-shaped copper wires.

[0004] In order to achieve the purpose of the present invention, the following scheme is proposed:

[0005] A double-sided welding device for a capacitor core comprises a plurality of storage boxes, an upper layer welding device, a lower layer welding device, a pushing mechanism, and a first conveying platform and a second conveying platform which are arranged in parallel.

[0006] The storage box is provided with an opening on one side, including a bottom plate, a U-shaped side plate and a cover plate, the cover plate is hinged to the U-shaped side plate, the cover plate is provided with a first U-shaped groove running through it, a second U-shaped groove is provided at a corresponding position of the bottom plate, a U-shaped copper wire is placed in the first U-shaped groove and the second U-shaped groove respectively, an elastic structure is provided on the inner wall of the first U-shaped groove for supporting the U-shaped copper wire, a plurality of first through holes are provided along the track of the first U-shaped groove, and a plurality of second through holes are provided along the track of the second U-shaped groove;

[0007] The conveying tail end of the conveying platform 2 is connected to the supporting platform. The conveying platform 1 is used to convey the core to the position corresponding to the supporting platform, and the conveying platform 2 is used to convey the storage box to the top of the supporting platform;

[0008] The pushing mechanism is arranged on the outer side of the conveying platform, and is used to push the multiple cores into the storage box on the top of the supporting platform;

[0009] The upper welding equipment is set up above the support platform, and is used to press the U-shaped copper wire in the cover plate down to the top of the core. Its welding gun passes through the corresponding first through hole, and is used to weld the U-shaped copper wire on the top of the core;

[0010] The lower layer welding equipment is arranged below the supporting platform, and its welding gun passes through the corresponding second through hole to weld the U-shaped copper wire at the bottom of the core.

[0011] The beneficial effect of the present invention is that the present invention can automatically arrange a plurality of cores in order, and automatically push a certain number of cores into a storage box with the help of a pushing mechanism, and then automatically complete the welding task of the U-shaped copper wires at the top and bottom of the cores through the ingenious cooperation of the storage box, the upper welding equipment, and the lower welding equipment, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A capacitor core arrangement structure diagram in the prior art is shown;

[0013] Figure 2 A structural diagram of a welding device is shown;

[0014] Figure 3 The structure diagram of the driving mechanism is shown;

[0015] Figure 4 Shows the storage box structure Figure 1 ;

[0016] Figure 5 Shows the storage box structure Figure 2 ;

[0017] Figure 6 Shows the front view of the upper welding equipment and the lower pressing assembly;

[0018] Figure 7 Shows the upper welding equipment and the right view of the lower welding equipment;

[0019] Figure 8 A structural diagram of the press-down assembly is shown;

[0020] Fig. 9 A bottom view of the hold-down assembly is shown;

[0021] Fig.10 It shows a structural diagram of a conveyor platform three and a movable plate;

[0022] Fig.11 The structure diagrams of the conveyor platform 1, conveyor platform 2 and conveyor platform 3 are shown;

[0023] Fig.12 A schematic diagram of the rubber layer and the U-shaped copper wire is shown;

[0024] Fig.13 A schematic diagram of a spring piece and a U-shaped copper wire is shown;

[0025] Fig.14 It shows the structural diagram of the state of opening the cover after welding is completed;

[0026] Figure numerals: storage box-1, bottom plate-11, second U-shaped groove-111, second through hole-112, U-shaped side plate-12, cover plate-13, first U-shaped groove-131, first through hole-132, fourth through hole-133, U-shaped copper wire-15, upper welding equipment-2, second power box-21, second lifting rod-22, second welding gun assembly-23, extension plate-231, lower welding equipment-3, first power box-31, first lifting rod-32, first welding gun assembly-33, fixed plate-34, movable plate-35, push plate Driving mechanism-4, telescopic rod-41, push plate-42, third power box-43, conveying platform-51, core-511, accommodating groove-512, notch-513, first baffle-514, conveying platform-52, conveying platform-53, supporting platform-6, table plate-61, third through hole-611, support foot-62, second baffle-63, bracket-7, rectangular frame-81, pressure block-82, groove-821, column-83, convex plate-831, spring-84, horizontal plate-85, rubber layer-91, spring piece-92. DETAILED DESCRIPTION

[0027] like Figure 2 As shown, this embodiment provides a double-sided welding device for a capacitor core, including a plurality of storage boxes 1, an upper layer welding device 2, a lower layer welding device 3, a pushing mechanism 4, a conveying platform 1 51 and a conveying platform 2 52.

[0028] like Figure 4 , Figure 5 As shown, from bottom to top, the storage box 1 includes a bottom plate 11, a U-shaped side plate 12 and a cover plate 13 in sequence. One side of the box composed of these three plates is opened, the cover plate 13 covers the top of the U-shaped side plate 12, and one side of the cover plate 13 is hinged to the U-shaped side plate 12. The cover plate 13 is provided with a first U-shaped groove 131 that runs through it from top to bottom, and a second U-shaped groove 111 is provided at a corresponding position of the bottom plate 11. A U-shaped copper wire 15 is placed in the first U-shaped groove 131 and the second U-shaped groove 111 respectively, and an elastic structure is provided on the inner wall of the first U-shaped groove 131. The elastic structure is used to support the U-shaped copper wire 15. Eight first through holes 132 are also provided along the trajectory of the first U-shaped groove 131. The first through holes 132 completely penetrate the cover plate 13 from top to bottom. The diameter of the first through holes 132 is greater than the inner width of the first U-shaped groove 131. Eight second through holes 112 are also provided along the trajectory of the second U-shaped groove 111. The position distribution of the second through holes 112 corresponds to that of the first through holes 132. The second through holes 112 completely penetrate the bottom plate 11 from top to bottom, and the diameter of the second through holes 112 is greater than the inner width of the second U-shaped groove 111.

[0029] Note that the second U-shaped groove 111 does not penetrate the bottom plate 11 downwards, so the inner wall of the second U-shaped groove 111 does not need to be provided with an additional elastic structure, and the second U-shaped groove 111 itself can support the U-shaped copper wire 15 .

[0030] The elastic structure in the first U-shaped groove 131 is used to prevent the U-shaped copper wire 15 from falling down. When the U-shaped copper wire 15 in the first U-shaped groove 131 is subjected to downward pressure, the elastic structure is squeezed and deformed so that the U-shaped copper wire 15 moves downward. To achieve this purpose, the elastic structure in this embodiment can be implemented in the following two ways:

[0031] The first one, such as Fig.12 As shown, the elastic structure includes a rubber layer 91, and the wall thickness of the rubber layer 91 increases from top to bottom;

[0032] The second type, such as Fig.13 As shown, the elastic structure includes a plurality of spring sheets 92 , the spring sheets 92 include a bent portion and a straight portion, the top end of the bent portion is connected to the inner wall of the first U-shaped groove 131 , the bottom end of the bent portion is connected to the top end of the straight portion, and the U-shaped copper wire 15 can be supported on the bent portion of the spring sheet 92 .

[0033] like Figure 2 As shown, the conveying platform 1 51 and the conveying platform 2 52 are arranged in parallel, and the conveying tail end of the conveying platform 2 52 is docked with the support platform 6. The conveying platform 1 51 is used to convey the core 511 and convey the core 511 to the position corresponding to the support platform 6. The conveying platform 2 52 is used to convey the storage box 1 and convey the storage box 1 to the top of the support platform 6, and the storage box 1 is opened toward the side of the conveying platform 1 51. The surface of the conveying platform 1 51 is higher than the surface of the conveying platform 2 52. The height difference between the two surfaces is equal to the thickness of the bottom plate 11 in the storage box 1. That is to say, when the storage box 1 is located on the top of the support platform 6, the top surface of the bottom plate 11 is flush with the surface of the conveying platform 1 51.

[0034] like Figure 2 , Figure 3 , Fig.11 As shown, the pushing mechanism 4 is arranged on the outside of the conveying platform 51, and is used to push the four cores 511 into the storage box 1 on the top of the support platform 6. More specifically, a first baffle 514 is provided at the conveying tail end of the conveying platform 51, and the first baffle 514 is used to stop the core 511. One side wall of the conveying platform 51 is provided with a receiving groove 512, and a corresponding position of the other side wall of the conveying platform 51 is provided with a notch 513. The pushing mechanism 4 includes a third power box 43, a telescopic rod 41 and a push plate 42 arranged at the movable end of the telescopic rod 41. The third power box 43 is arranged on the bracket 7. A cylinder or an oil cylinder is provided in the third power box 43 for driving the telescopic rod 41. The push plate 42 is arranged in the receiving groove 512. When the telescopic rod 41 is extended, the push plate 42 can push the four cores 511 from the notch 513 to the storage box 1 on the top of the support platform 6.

[0035] like Figure 2 , Figure 4As shown, the upper welding device 2 is mounted above the support platform 6, and the upper welding device 2 is used to press the U-shaped copper wire 15 in the cover plate 13 down to the top of the four cores 511. The welding gun of the upper welding device 2 passes through the corresponding first through hole 132, and is used to weld the U-shaped copper wire 15 on the top of the four cores 511. More specifically, the upper welding device 2 includes a second power box 21, a second lifting rod 22 and a second welding gun assembly 23 arranged at the bottom of the second lifting rod 22. The second power box 21 is arranged on the bracket 7. A cylinder or an oil cylinder is provided in the second power box 21 for driving the second lifting rod 22. The eight welding guns at the bottom of the second welding gun assembly 23 correspond to the eight first through holes 132 respectively.

[0036] like Figure 2 , Figure 4 As shown, the lower welding device 3 is arranged below the support platform 6, and the welding gun of the lower welding device 3 passes through the corresponding second through hole 112 for welding the U-shaped copper wire 15 at the bottom of the four cores 511. More specifically, the support platform 6 includes a table plate 61 and two supporting legs 62 arranged at the bottom thereof, and a second baffle 63 is provided at one end of the top of the table plate 61 away from the conveying platform 2 52. The second baffle 63 is used to stop the storage box 1 on the table plate 61, and eight third through holes 611 are provided at positions on the table plate 61 corresponding to the eight second through holes 112. The lower welding device 3 is arranged between the two supporting legs 62, and the lower welding device 3 includes a first power box 31, a first lifting rod 32 and a first welding gun assembly 33 arranged at the top of the first lifting rod 32. A cylinder or an oil cylinder is provided in the first power box 31 for driving the first lifting rod 32, and the eight welding guns at the top of the first welding gun assembly 33 correspond to the eight third through holes 611 respectively.

[0037] The method of using the above scheme is as follows: the core 511 is sequentially conveyed by the conveying platform 1 51, and the core 511 is stopped by the first baffle 514; the storage box 1 is sequentially conveyed by the conveying platform 2 52, and the storage box 1 is stopped on the table 61 by the second baffle 63; the telescopic rod 41 is driven by the third power box 43, and the push plate 42 pushes the four cores 511 from the notch 513 to the storage box 1 on the top of the table 61; the U-shaped copper wire 15 in the cover plate 13 is first pressed down by the upper welding device 2 To the top of the four cores 511, eight welding guns pass through the corresponding first through holes 132 to weld the U-shaped copper wires 15 on the top of the four cores 511. The upper welding equipment 2 does not release the downward pressure on the four cores 511 first. Then the first power box 31 drives the first lifting rod 32, and the eight welding guns on the top of the first welding gun assembly 33 pass through the eight third through holes 611 and the eight second through holes 112 upward to weld the U-shaped copper wires 15 at the bottom of the four cores 511 to complete the double-sided welding task.

[0038] In the above scheme, two details need to be further improved:

[0039] The first detail is that after the welding is completed, in order to facilitate the removal of the storage box 1 on the top of the table 61, the present embodiment adopts the following measures: Figure 2 , Figure 7 , Fig.10 As shown, the device also includes a conveyor platform 3 53 perpendicular to the conveyor platform 2 52, and the conveyor platform 3 53 is connected to the table 61 of the support platform 6. The lower welding equipment 3 also includes a plurality of fixed plates 34 and a plurality of movable plates 35 that are staggered, and the fixed plates 34 and the movable plates 35 are both located in the gap between the conveyor platform 3 53 and the support platform 6. The plurality of fixed plates 34 are fixedly connected to the side walls of the first power box 31, and the top surfaces of the fixed plates 34, the table 61 and the conveyor platform 3 53 are flush. The plurality of movable plates 35 are fixedly connected to the side walls of the first welding gun assembly 33, and the top surfaces of the movable plates 35 are higher than the top surfaces of the support platform 6. The movable plates 35 are used to limit the storage box 1 on the top of the table 61, and when the first lifting rod 32 is used to move down the first welding gun assembly 33 and the plurality of movable plates 35, the restriction is released so that the storage box 1 on the top of the table 61 can be pushed to the conveyor platform 3 53 by the pushing mechanism 4.

[0040] The principle is as follows: when the push plate 42 pushes the four cores 511 from the notch 513 into the storage box 1 on the top of the table 61, the movable plate 35 can play a blocking effect to prevent the storage box 1 from moving at will; when the first power box 31 drives the first lifting rod 32, the first welding gun assembly 33 moves up and welds the U-shaped copper wire 15 at the bottom of the four cores 511, and the movable plate 35 also moves up with the first welding gun assembly 33; when the welding task of the first welding gun assembly 33 is completed, the first power box 31 drives the first lifting rod 32 to move the first welding gun assembly 33 downward, and makes the top surface of the movable plate 35 flush with the fixed plate 34, thereby releasing the restriction of the movable plate 35 on the storage box 1 on the top of the table 61; then the pushing mechanism 4 is used to push the storage box 1 on the top of the table 61 to the conveying table 3 53, thereby achieving the purpose of automatically taking out the storage box 1 on the top of the table 61.

[0041] like Fig.14 As shown, it shows the state structure diagram of the cover plate 13 opened after welding. Because one side of the cover plate 13 is hinged to the U-shaped side plate 12, it is very convenient to open the cover plate 13 and also convenient to take out the four cores 511 in the storage box 1.

[0042] The second detail is to use the upper welding device 2 to press the U-shaped copper wire 15 in the cover plate 13 down to the top of the four cores 511, which is implemented as follows: Figure 4 As shown, seven fourth through holes 133 are provided along the track of the first U-shaped groove 131, the first through holes 132 and the fourth through holes 133 are staggered, the fourth through holes 133 completely penetrate the cover plate 13 from top to bottom, and the diameter of the fourth through holes 133 is greater than the inner width of the first U-shaped groove 131, as shown in FIG. Figure 2 , Figure 4 , Figure 8 As shown, the upper welding equipment 2 also includes a pressing component, which includes a rectangular frame 81, seven pressing blocks 82 and four columns 83 arranged at the top of the rectangular frame 81. An extension plate 231 is respectively provided on both side walls of the second welding gun assembly 23. The top of the column 83 passes through the corresponding extension plate 231 and is connected with a convex plate 831. The diameter of the convex plate 831 is larger than the diameter of the column 83. A spring 84 is provided on the periphery of the column 83. The two ends of the spring 84 are respectively connected to the extension plate 231 and the rectangular frame 81. Seven horizontal plates 85 are provided on the inner wall of the rectangular frame 81. The pressing block 82 is fixedly arranged at the bottom of the corresponding horizontal plate 85. The bottom surface of the pressing block 82 is lower than the bottom surface of the welding gun in the second welding gun assembly 23. When a storage box 1 is stopped on the table 61, the pressing block 82 is located above the corresponding fourth through hole 133. When the pressing block 82 moves downward, it is used to press the U-shaped copper wire 15 in the cover plate 13 down to the top of the core 511.

[0043] The principle is as follows: the second power box 21 drives the second lifting rod 22 to move the second welding gun assembly 23 and the pressing assembly downward, the pressing block 82 moves to the corresponding fourth through hole 133 to first contact the U-shaped copper wire 15, and then presses the U-shaped copper wire 15 downward, the spring 84 is continuously compressed, and the pressing force of the pressing block 82 continues to increase, so that the U-shaped copper wire 15 is separated from the first U-shaped groove 131 and pressed down to the top of the four cores 511, and then the eight welding guns of the second welding gun assembly 23 pass through the corresponding first through holes 132, thereby welding the U-shaped copper wires 15 on the top of the four cores 511.

[0044] A few points are explained here: the pressing block 82 corresponds to the fourth through hole 133, and the welding gun of the second welding gun assembly 23 corresponds to the first through hole 132. The pressing block 82 and the welding gun of the second welding gun assembly 23 do not interfere with each other, and the pressing block 82 is first used to act on the U-shaped copper wire 15 to make the U-shaped copper wire 15 break away from the first U-shaped groove 131, which makes it more convenient for the welding gun of the second welding gun assembly 23 to perform welding; the pressing block 82 plays a role in fixing the U-shaped copper wire 15 on the top of the core 511. When the lower-layer welding equipment 3 is used to weld the U-shaped copper wire 15 at the bottom of the core 511, the pressing block 82 also plays a role in fixing the core 511.

[0045] Preferably, Figure 6 , Fig. 9 As shown, each pressing block 82 has a groove 821 at the bottom. The longitudinal section of the groove 821 is a downward trumpet-shaped structure. When the pressing block 82 presses down the U-shaped copper wire 15, the groove 821 is used to accommodate the U-shaped copper wire 15.

[0046] The above embodiments are only used to illustrate the technical ideas and features of the present invention, and are not intended to be the only or limit the present invention. It should be understood by those skilled in the art that various changes or equivalent substitutions made to the present invention without departing from the scope of the present invention all fall within the scope of protection of the present invention.

Claims

1. A double-sided welding device for capacitor core, characterized in that: It comprises a plurality of storage boxes (1), an upper layer welding device (2), a lower layer welding device (3), a pushing mechanism (4), and a first conveying platform (51) and a second conveying platform (52) arranged in parallel; The storage box (1) is provided with an opening on one side, and comprises a bottom plate (11), a U-shaped side plate (12) and a cover plate (13); the cover plate (13) is hinged to the U-shaped side plate (12); the cover plate (13) is provided with a first U-shaped groove (131) penetrating the cover plate (13); a second U-shaped groove (111) is provided at a corresponding position of the bottom plate (11); a U-shaped copper wire (15) is respectively placed in the first U-shaped groove (131) and the second U-shaped groove (111); an elastic structure is provided on the inner wall of the first U-shaped groove (131) for supporting the U-shaped copper wire (15); a plurality of first through holes (132) are provided along the track of the first U-shaped groove (131); and a plurality of second through holes (112) are provided along the track of the second U-shaped groove (111); The conveying tail end of the second conveying platform (52) is docked with the support platform (6), the first conveying platform (51) is used to convey the core (511) to a position corresponding to the support platform (6), and the second conveying platform (52) is used to convey the storage box (1) to the top of the support platform (6); The pushing mechanism (4) is arranged outside the first conveying platform (51) and is used to push the plurality of cores (511) into the storage box (1) on the top of the supporting platform (6); The upper layer welding device (2) is mounted above the support platform (6) and is used to press the U-shaped copper wire (15) in the cover plate (13) down to the top of the core (511); the welding gun thereof passes through the corresponding first through hole (132) and is used to weld the U-shaped copper wire (15) on the top of the core (511); The lower layer welding equipment (3) is arranged below the support platform (6), and its welding gun passes through the corresponding second through hole (112) to weld the U-shaped copper wire (15) at the bottom of the core (511).

2. The capacitor core double-sided welding device according to claim 1, characterized in that: A first baffle (514) is provided at the conveying tail end of the conveying platform (51) for stopping the core (511); the top surface of the bottom plate (11) is flush with the surface of the conveying platform (51); one side wall of the conveying platform (51) is provided with a receiving groove (512); the other side wall is provided with a notch (513); the pushing mechanism (4) comprises a third power box (43), a telescopic rod (41) and a push plate (42) provided at the movable end of the telescopic rod (41); the third power box (43) is provided on the bracket (7); the push plate (42) is provided in the receiving groove (512); and the push plate (42) is used to push the plurality of cores (511) from the notch (513) to the storage box (1) at the top of the support platform (6).

3. The capacitor core double-sided welding device according to claim 1, characterized in that: The support platform (6) comprises a platform (61) and two supporting legs (62) arranged at the bottom thereof; a second baffle (63) is provided at one end of the top of the platform (61) away from the second conveying platform (52) for stopping the storage box (1); and a plurality of third through holes (611) are provided at positions on the platform (61) corresponding to the plurality of second through holes (112).

4. The capacitor core double-sided welding device according to claim 3, characterized in that: The lower layer welding equipment (3) is arranged between the two supporting legs (62), and comprises a first power box (31), a first lifting rod (32), and a first welding gun assembly (33) arranged on the top of the first lifting rod (32), wherein the plurality of welding guns on the top of the first welding gun assembly (33) respectively correspond to the plurality of third through holes (611).

5. The capacitor core double-sided welding device according to claim 4, characterized in that: The apparatus further comprises a conveyor platform 3 (53) perpendicular to the conveyor platform 2 (52), the conveyor platform 3 (53) being connected to the support platform (6), the lower layer welding equipment (3) further comprising a plurality of staggered fixed plates (34) and a plurality of movable plates (35), wherein the fixed plates (34) and the movable plates (35) are both located in the gap between the conveyor platform 3 (53) and the support platform (6), the plurality of fixed plates (34) being fixedly connected to the side wall of the first power box (31), the top surface of the fixed plates (34) and the support platform The top surface of the support platform (6) is flush with the top surface of the conveyor platform (53), and a plurality of movable plates (35) are fixedly connected to the side wall of the first welding gun assembly (33). The top surface of the movable plates (35) is higher than the top surface of the support platform (6) and is used to restrict the storage box (1) on the top of the support platform (6). When the first lifting rod (32) is used to move the first welding gun assembly (33) and the plurality of movable plates (35) downward, the restriction is released and the storage box (1) is pushed to the conveyor platform (53) by the pushing mechanism (4).

6. The capacitor core double-sided welding device according to claim 1, characterized in that: The upper layer welding equipment (2) comprises a second power box (21), a second lifting rod (22), and a second welding gun assembly (23) arranged at the bottom of the second lifting rod (22), wherein a plurality of welding guns at the bottom of the second welding gun assembly (23) respectively correspond to a plurality of first through holes (132).

7. The capacitor core double-sided welding device according to claim 6, characterized in that: A plurality of fourth through holes (133) are also provided along the track of the first U-shaped groove (131), the first through holes (132) and the fourth through holes (133) are staggeredly distributed, the upper layer welding device (2) further comprises a pressing assembly, the pressing assembly comprises a rectangular frame (81), a plurality of pressing blocks (82) and a plurality of upright posts (83) arranged at the top of the rectangular frame (81), the two side walls of the second welding gun assembly (23) are respectively provided with extension plates (231), the top of the upright post (83) penetrates the corresponding extension plate (231) and is connected to a convex plate ( 831), the diameter of the convex plate (831) is larger than the diameter of the column (83), a spring (84) is provided on the outer periphery of the column (83), two ends of the spring (84) are respectively connected to the extension plate (231) and the rectangular frame (81), a plurality of horizontal plates (85) are provided on the inner wall of the rectangular frame (81), a pressing block (82) is fixedly arranged at the bottom of the horizontal plate (85), the pressing block (82) is located above the corresponding fourth through hole (133), and is used to press the U-shaped copper wire (15) in the cover plate (13) down to the top of the core (511).

8. The capacitor core double-sided welding device according to claim 7, characterized in that: A groove (821) is provided at the bottom of the pressing block (82). The longitudinal section of the groove (821) is a trumpet-shaped structure facing downward. When the U-shaped copper wire (15) is pressed downward, the groove (821) is used to accommodate the U-shaped copper wire (15).

9. The capacitor core double-sided welding device according to claim 1, characterized in that: The elastic structure comprises a rubber layer (91), and the wall thickness of the rubber layer (91) increases from top to bottom.

10. The capacitor core double-sided welding device according to claim 1, characterized in that: The elastic structure comprises a plurality of spring sheets (92), wherein the spring sheets (92) comprise a curved portion and a straight portion, wherein the top end of the curved portion is connected to the inner wall of the first U-shaped groove (131), and the bottom end of the curved portion is connected to the top end of the straight portion.

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