Rivet pressing device for distribution box production

Abstract

The invention discloses a press riveting device for distribution box production, and relates to the technical field of press riveting devices, the press riveting device comprises a press riveting table, a hydraulic rod is fixedly mounted at the top of the press riveting table, an upper die holder is fixed at the telescopic end of the hydraulic rod, a lower die holder located under the upper die holder is fixedly connected to the press riveting table, and the press riveting device further comprises a mechanism; the positioning mechanism comprises a rivet pressing head connected to the bottom end of the upper die base in a sliding mode, a reset spring is arranged between the rivet pressing head and the upper die base, a connecting rod is fixedly connected to the interior of the upper die base, and an extrusion block is fixed to the bottom end of the connecting rod. Through force balance, the hole site of the assembly part is aligned with the pressing rivet nut during pressing rivet, so that the pressing rivet precision is improved, all the assembly parts subjected to pressing rivet are assembled conveniently, meanwhile, the material flowing uniformity during pressing rivet of the assembly parts is improved, and the connecting strength between the assembly parts and the pressing rivet nut is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of riveting devices, and in particular to a riveting device used for the production of distribution boxes. Background Art

[0002] A distribution box is an electrical device used to distribute and control electrical energy. It is generally made of metal. In order to achieve quick assembly, the distribution box must be riveted.

[0003] The traditional riveting device is mainly composed of a hydraulic rod and upper and lower die seats. During operation, the rivet nut is first placed on the lower die seat, and then the hole position on the distribution box assembly that needs to be riveted is accurately fitted on the rivet nut. After starting the device, the hydraulic rod drives the upper die seat downward, causing the assembly and the rivet nut to squeeze each other. Under the action of the extrusion force, the rivet nut forces the material around the hole position of the assembly to undergo plastic deformation, and then embeds itself into the hole position to achieve a fixed connection between the rivet nut and the assembly.

[0004] In order to ensure that the material has sufficient space to flow and deform during riveting, so that the rivet nut can better fit tightly with the assembly hole to form a strong connection, the diameter of the hole on the assembly needs to be designed to be slightly larger than the diameter of the rivet nut. However, this design will bring a disadvantage: when the assembly hole is fitted on the rivet nut, it is extremely difficult to accurately position the rivet nut in the center of the hole, resulting in uneven force between the nut and the hole wall during the riveting process, which in turn leads to a decrease in connection strength. What is more serious is that it may also cause the area around the assembly hole to tilt, or one side of the nut to protrude, affecting the overall appearance quality of the product. Summary of the invention

[0005] The purpose of the present invention is to propose a riveting device for the production of distribution boxes in order to solve the problem that when the assembly hole is sleeved on the riveting nut, it is extremely difficult to accurately position the riveting nut at the center of the hole, resulting in uneven force between the nut and the hole wall during the riveting process.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technology: a riveting device for the production of distribution boxes: comprising a riveting table, a hydraulic rod is fixedly installed on the top of the riveting table, an upper die seat is fixed on the telescopic end of the hydraulic rod, a lower die seat located directly below the upper die seat is fixedly connected to the riveting table, and further comprising:

[0007] The positioning mechanism comprises a rivet head slidably connected to the bottom end of the upper die seat, a return spring is arranged between the rivet head and the upper die seat, a connecting rod is fixedly connected to the interior of the upper die seat, an extrusion block is fixed to the bottom end of the connecting rod, an inner support plate is elastically connected to the interior of the extrusion block, and a pushing assembly is arranged at the bottom of the rivet head;

[0008] The pushing assembly comprises a mounting tube, the interior of which is slidably connected with a spring telescopic rod, and a spring 1 is arranged between the spring telescopic rod and the mounting tube;

[0009] During the downward pressing process of the extrusion block, the rivet hole and the rivet nut are internally supported and positioned respectively by the spring telescopic rod and the internal support plate.

[0010] As a further description of the above technical solution: it also includes a constraint unit, which includes a support ring movably connected to the bottom end of the rivet head and slidably connected to the mounting tube, the diameter of the support ring is equal to the diameter of the rivet hole, and a spring 2 is provided between the support ring and the rivet head, and the support ring is located inside the rivet hole to support and constrain the material.

[0011] As a further description of the above technical solution: it also includes a leveling unit, which includes a protruding rod fixed to the top of the support ring, a spiral guide groove is opened on the outside of the connecting rod, the protruding rod is embedded in the guide groove, and a chip removal groove is opened on the top inner wall of the lower die base.

[0012] As a further description of the above technical solution: the bottom of the mounting tube is movably connected with a friction plate, and the friction plate includes two groups of convex teeth fixed on the upper surface of the friction plate and inside the mounting tube.

[0013] As a further description of the above technical solution: an auxiliary ejection assembly is arranged inside the lower die base, and the auxiliary ejection assembly includes a sliding part slidably connected to the inside of the lower die base, a spring three is provided at the bottom of the sliding part, and an ejection part sealed with the inner wall of the lower die base is slidably connected inside the sliding part.

[0014] As a further description of the above technical solution: a discharge channel is provided inside the lower die seat, and the top of the ejector is conical.

[0015] As a further description of the above technical solution: an electromagnet is fixedly installed on the bottom of the extrusion block.

[0016] As a further description of the above technical solution: the top of the support ring is rotatably connected to a ring member fixed to the two bottom ends of the spring.

[0017] In summary, due to the use of the above-mentioned technology, a riveting device for the production of distribution boxes has the following beneficial effects:

[0018] The present application supports the hole position of the assembly part and the inner wall of the rivet nut by pushing the component and the inner support plate respectively, and aligns the hole position of the assembly part with the rivet nut during riveting through force balance, thereby improving the riveting accuracy, so as to facilitate the assembly of the various assembly parts after riveting, and at the same time improves the uniformity of material flow during riveting of the assembly part, ensures the connection strength between the assembly part and the rivet nut, and prevents uneven deformation and tilting around the hole position of the assembly part caused by riveting, thereby improving the quality of the riveting processing of the assembly part.

[0019] The present application can accurately position the self-clinching nut, so that the diameter of the positioning groove on the lower die base for placing the self-clinching nut can be enlarged, which is convenient for placing the self-clinching nut and avoids the situation where the self-clinching nut and the positioning groove are too tightly fitted after the self-clinching, making it difficult to unload the material, thereby improving the efficiency of the self-clinching process.

[0020] The present application supports the inner wall of the assembly hole through the support ring during riveting, effectively preventing the assembly hole from being deformed when the rivet head squeezes the assembly, which is conducive to the precise assembly of subsequent parts, improves the assembly quality and consistency of the product, and avoids stress concentration around the assembly hole that causes fatigue cracks during long-term use, reduces the service life of the assembly, and improves the riveting effect of thick and easily deformed assemblies.

[0021] The flattening unit can drive the rivet nut to deflect before riveting, avoiding impurities inside the positioning groove of the lower die seat or burrs on the bottom of the rivet nut itself, which may cause the rivet nut to tilt, thereby ensuring the flat posture of the rivet nut during riveting and guaranteeing the riveting effect. Not only that, the vibration generated by the flattening unit after riveting can also reduce the tightness of the connection between the support ring and the assembly part, making it easier to separate the assembly part from the support ring after riveting.

[0022] The auxiliary ejection component can not only discharge the metal chips generated during the riveting process to prevent the chips from affecting the placement of the rivet nut, but also assist in removing the rivet nut after the riveting is completed, saving manpower and speeding up the riveting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It shows an overall schematic diagram provided according to an embodiment of the present invention;

[0024] Figure 2 A cross-sectional view of an upper die seat provided according to an embodiment of the present invention is shown;

[0025] Figure 3 The embodiment of the present invention provides Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 A schematic diagram of a pushing assembly provided according to an embodiment of the present invention is shown;

[0027] Figure 5 A schematic diagram of a friction plate provided according to an embodiment of the present invention is shown;

[0028] Figure 6 A cross-sectional view of a lower die base provided according to an embodiment of the present invention is shown;

[0029] Figure 7 A schematic diagram of an auxiliary ejection assembly provided according to an embodiment of the present invention is shown;

[0030] Figure 8 The embodiment of the present invention provides Figure 7 Enlarged view of point B in the middle;

[0031] Fig. 9 A first state diagram of a constraint unit provided according to an embodiment of the present invention is shown;

[0032] Fig.10 A second state diagram of a constraint unit provided according to an embodiment of the present invention is shown.

[0033] Legend:

[0034] 10. Riveting table; 11. Hydraulic rod; 12. Lower die seat; 13. Upper die seat;

[0035] 20. Positioning mechanism; 21. Riveting head; 22. Return spring; 23. Connecting rod; 24. Extrusion block; 25. Inner support plate; 26. Pushing assembly; 261. Mounting tube; 262. Spring telescopic rod; 263. Spring 1;

[0036] 30. Constraint unit; 31. Support ring; 32. Spring 2;

[0037] 40. Smoothing unit; 41. Protruding rod; 42. Friction plate; 421. Protruding teeth;

[0038] 50. Auxiliary ejection assembly; 51. Sliding member; 52. Spring three; 53. Ejection member; 54. Electromagnet. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technology in the embodiments of the present invention, a riveting device for the production of distribution boxes. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0040] like Figure 1-Figure 10As shown, the present invention provides a riveting device for distribution box production: comprising a riveting table 10, a hydraulic rod 11 is fixedly installed on the top of the riveting table 10, an upper die seat 13 is fixed to the telescopic end of the hydraulic rod 11, a lower die seat 12 located directly below the upper die seat 13 is fixedly connected to the riveting table 10, a positioning groove for placing a rivet nut is provided on the top of the lower die seat 12, the rivet nut is placed in the positioning groove during riveting, and then the hole position of the distribution box assembly part is sleeved on the top of the rivet nut, the assembly part is pressed down to be squeezed with the rivet nut, the rivet nut squeezes and deforms the hole position of the assembly part, and is firmly connected with the hole position.

[0041] Reference Figure 2 and Figure 3 , also includes a positioning mechanism 20, the positioning mechanism 20 includes a rivet head 21 slidably connected to the bottom end of the upper die seat 13, a return spring 22 is provided between the rivet head 21 and the upper die seat 13, the return spring 22 is always in a compressed state, and a downward elastic force is applied to the rivet head 21. When the hydraulic rod 11 extends and drives the upper die seat 13 to move downward, the upper die seat 13 drives the rivet head 21 to move downward through the return spring 22. When the rivet head 21 is supported by the assembly part of the distribution box and cannot continue to move downward, the upper die seat 13 can still move downward until the upper die seat 13 presses the rivet head 21 down to rivet the assembly part. The upper die seat 13 is fixedly connected with a connecting rod 23 inside, and an extrusion block 24 is fixed at the bottom end of the connecting rod 23. The top and bottom edges of the extrusion block 24 are both set as inclined surfaces, and the inner support plate 25 is elastically connected to the extrusion block 24. Specifically, the inner support plate 25 is slidably connected to the extrusion block 24 and a spring is provided between the two. A pushing component 26 is provided at the bottom of the rivet head 21;

[0042] Reference Figure 3 and Fig.10 When riveting a thicker assembly, the depth of the rivet nut embedded in the assembly is less than the depth of the assembly hole. Therefore, during riveting, the position of the assembly hole wall that is not supported by the rivet nut is prone to deformation. For this purpose, a constraint unit 30 is provided. The constraint unit 30 includes a support ring 31 movably connected to the bottom end of the rivet head 21. The diameter of the support ring 31 is equal to the diameter of the rivet hole. After the support ring 31 is embedded in the riveting hole of the assembly, the material around the hole wall is supported and constrained to prevent the material of the squeezed part of the assembly from flowing toward the hole when the rivet head 21 is riveted, resulting in uneven stress concentration of the material around the assembly hole, thereby improving the riveting quality. After the support ring 31 is embedded in the riveting hole, it can also play a positioning effect, avoiding position deviation again during riveting after the assembly is positioned, and further improving the accuracy of riveting. A spring 2 32 is provided between the support ring 31 and the rivet head 21.

[0043] Reference Figure 4The pushing assembly 26 includes a mounting tube 261 slidably connected to the inside of the support ring 31, a spring telescopic rod 262 is slidably connected to the inside of the mounting tube 261, and a spring 263 is provided between the spring telescopic rod 262 and the mounting tube 261;

[0044] During the downward pressing process of the extrusion block 24, the spring telescopic rod 262 is squeezed by the inclined surface to make the spring telescopic rod 262 move radially to a position away from the center point of the installation tube 261, thereby supporting the inner wall of the hole of the assembly part. Under the support of the four spring telescopic rods 262, the assembly part is positioned by force balance, so that the hole on the assembly part is aligned with the installation tube 261 up and down. After the extrusion block 24 moves to the inside of the rivet nut, the inner support plate 25 supports the inner wall of the rivet nut under the elastic force of the spring, and also positions the rivet nut. The rivet hole and the rivet nut are respectively supported and positioned by the spring telescopic rod 262 and the inner support plate 25, so that the hole of the assembly part is aligned with the rivet nut, thereby ensuring the accuracy of the rivet and ensuring the firmness of the connection between the rivet nut and the hole of the assembly part after the rivet.

[0045] Reference Figure 3 , Figure 4 and Figure 5 , since it is inevitable that debris will enter the positioning groove of the lower die seat 12 during the riveting process, causing the placed rivet nut to tilt, thereby causing damage to the accessories during the riveting process, a flattening unit 40 is also provided for this purpose, and the flattening unit 40 includes a protruding rod 41 fixed to the top of the support ring 31, and a spiral guide groove is provided on the outside of the connecting rod 23, and the protruding rod 41 is embedded in the guide groove. After the rivet head 21 is supported by the assembly part, the connecting rod 23 moves downward relative to the rivet head 21, causing the protruding rod 41 to slide in the guide groove, thereby driving the support ring 31 to rotate, and the top of the support ring 31 is rotatably connected to a ring member fixed to the bottom end of the second spring 32, which is used to prevent the second spring 32 from being twisted due to the rotation of the support ring 31;

[0046] The support ring 31 rotates to drive the mounting tube 261 to rotate. The bottom of the mounting tube 261 is movably connected with a friction plate 42. The friction plate 42 includes two groups of convex teeth 421 fixed on the upper surface of the friction plate 42 and inside the mounting tube 261. When the friction plate 42 contacts the self-clinching nut, the mounting tube 261 is retracted into the support ring 31, and the friction plate 42 is retracted into the mounting tube 261. At this time, when the two groups of convex teeth 421 are engaged with each other, the rotation of the mounting tube 261 drives the friction plate 42 to rotate. The friction plate 42 drives the self-clinching nut to deflect under the action of friction force. A chip groove is provided on the inner wall of the top end of the lower die base 12. The self-clinching nut deflects the debris blocked at its bottom into the chip groove, thereby restoring the flatness of the nut. The friction between the dense chip groove and the self-clinching nut can also remove burrs on the bottom surface of the self-clinching nut, thereby further improving the flatness of the self-clinching nut.

[0047] When the connecting rod 23 moves upward after the riveting is completed, the installation cylinder 261 will rotate in the opposite direction. At this time, the installation cylinder 261 cannot drive the friction plate 42 to rotate through the convex teeth 421. The friction between the friction plate 42 and the riveting nut prevents the friction plate 42 from rotating. The rotation of the installation cylinder 261 will overcome the elastic force of the spring 2 32 under the obstruction of the convex teeth 421 and drive the support ring 31 to move up and down continuously, causing looseness between the support ring 31 and the assembly, which is convenient for the support ring 31 to be separated from the assembly.

[0048] Reference Figure 6 In order to facilitate the ejection of the rivet nut after riveting and discharge the debris in the lower die base 12, an auxiliary ejection assembly 50 is arranged inside the lower die base 12, and the auxiliary ejection assembly 50 includes a sliding member 51 slidably connected to the inside of the lower die base 12, and a spring 52 is arranged at the bottom of the sliding member 51. The sliding member 51 is internally slidably connected with an ejection member 53 sealed with the inner wall of the lower die base 12, and 53 is made of iron. When the extrusion block 24 pushes the ejection member 53 downward, negative pressure is formed inside the lower die base 12, and the outside air enters the lower die base 12 through the gap between the lower die base 12 and the rivet nut and the chip discharge groove. The lower die base 12 is provided with a discharge channel inside, and an electromagnet 54 is fixedly installed at the bottom of the extrusion block 24. The top of the ejection member 53 is conical to prevent the debris from affecting the electromagnet 54 to adsorb the ejection member 53, and after the extrusion block 24 moves up, the sliding member 51 drives the ejection member 53 to move up under the elastic force of the spring 52 to push the debris into the discharge channel;

[0049] After the electromagnet 54 absorbs the ejector 53, the connecting rod 23 and the extrusion block 24 move upward after the riveting is completed, driving the electromagnet 54 and the ejector 53 to move upward, and the rivet nut is ejected upward by the ejector 53 so that the riveting process can be performed again.

[0050] Working principle: Place the rivet nut in the positioning groove on the lower die seat 12, then sleeve the rivet hole of the assembly part onto the rivet nut, control the hydraulic rod 11 to extend to drive the upper die seat 13, the return spring 22 and the rivet head 21 to move downward, and the rivet head 21 drives the support ring 31 and the installation tube 261 to move downward, and the diameter of the installation tube 261 is smaller than the diameter of the rivet hole;

[0051] Reference Fig. 9 and Fig.10When the rivet hole of the assembly part is not aligned with the support ring 31, the support ring 31 is blocked from moving downward when it contacts the assembly part. When the rivet head 21 continues to move downward, the support ring 31 shrinks into the rivet head 21, the spring 232 is compressed, and the installation tube 261 enters the hole. When the rivet head 21 contacts the assembly part, the upper die seat 13 continues to move downward to drive the connecting rod 23 to move downward, the reset spring 22 is gradually compressed, the rivet head 21 stops moving downward, the connecting rod 23 moves downward to drive the extrusion block 24 and the inner support plate 25 to move, the extrusion block 24 moves downward to squeeze the spring telescopic rod 262, so that the spring telescopic rod 262 moves outward to abut against the assembly part. On the inner wall of the hole, the assembly hole is balanced under the support of the four spring telescopic rods 262, and the center point coincides with the installation tube 261. At this time, the support ring 31 is aligned with the hole. Under the elastic force of the spring 2 32, the support ring 31 enters the hole and the bottom surface contacts the rivet nut. The installation tube 261 and the friction plate 42 are blocked by the rivet nut. The installation tube 261 shrinks into the support ring 31, and the friction plate 42 contacts the top surface of the rivet nut and is pushed into the installation tube 261. The two groups of convex teeth 421 are interlocked with each other, and then the extrusion block 24 continues to move downward into the rivet nut. The rivet nut is centered under the support of the four inner support plates 25 and aligned with the hole.

[0052] When the rivet hole of the assembly part is aligned with the support ring 31, the rivet head 21 moves downward to directly drive the second spring 32 and the support ring 31 to move downward, so that the support ring 31 enters the hole of the assembly part;

[0053] The connecting rod 23 continues to move downward to make the protruding rod 41 slide in the guide groove, thereby driving the support ring 31 and the installation cylinder 261 to rotate. Under the action of the two sets of protruding teeth 421, the installation cylinder 261 rotates to drive the friction plate 42 to rotate, driving the self-clinching nut to deflect, so that the debris blocked at the bottom of the nut enters the chip removal groove, and the nut is restored to be flat;

[0054] The extrusion block 24 drives the electromagnet 54 to continue to move downward, and the electromagnet 54 presses the ejector 53 downward to drive the sliding member 51 to move downward. The spring 52 is compressed, and the sliding member 51 and the ejector 53 move downward to form a negative pressure inside the lower die base 12. The outside air enters the lower die base 12 through the gap between the lower die base 12 and the rivet nut and the chip groove, and the debris inside the chip groove is brought into the lower die base 12.

[0055] The upper die seat 13 moves downward to press the rivet head 21 downward, and the rivet head 21 squeezes the top of the assembly part, so that the assembly part and the rivet nut are squeezed, and the rivet nut squeezes and deforms the rivet hole of the assembly part, and is firmly combined with the hole to complete the rivet. Then, the hydraulic rod 11 is controlled to contract to drive the upper die seat 13 to move upward, and the connecting rod 23, the extrusion block 24 and the electromagnet 54 move upward. Since the support ring 31 is wrapped around the outside of the installation cylinder 261 at this time, the spring telescopic rod 262 is squeezed when the extrusion block 24 is reset, so that the spring telescopic rod 262 itself is compressed, and the spring telescopic rod 262 does not slide relative to the installation cylinder 261. The elastic force of the spring three 52 drives the sliding member 51 and the ejector 53 to move upward, and the ejector 53 pushes the debris on its top into the discharge channel. After the sliding member 51 and the ejector 53 are reset, the electromagnet 54 continues to move upward and drives the ejector 53 to move upward through the magnetic attraction, so that the ejector 53 applies an upward force to the rivet nut to assist in the removal of the rivet nut.

[0056] During the upward movement of the connecting rod 23 relative to the rivet head 21, the support ring 31 and the mounting tube 261 are driven to rotate in the opposite direction through the convex rod 41. At this time, under the action of the friction force between the friction plate 42 and the rivet nut, the mounting tube 261 cannot drive the friction plate 42 to rotate through the convex teeth 421. Therefore, the rotation of the mounting tube 261 will overcome the elastic force of the spring 2 32 under the obstruction of the convex teeth 421 and drive the support ring 31 to move up and down continuously, causing looseness between the support ring 31 and the assembly, which is convenient for the support ring 31 to be separated from the assembly.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention, according to the technology of the present invention a riveting device for the production of distribution boxes and its inventive concept, make equivalent replacement or changes, should be covered within the protection scope of the present invention.

Claims

1. A riveting device for producing a distribution box, comprising a riveting platform (10), a hydraulic rod (11) fixedly mounted on the top of the riveting platform (10), an upper die seat (13) fixedly mounted on the telescopic end of the hydraulic rod (11), a lower die seat (12) located directly below the upper die seat (13) fixedly connected to the riveting platform (10), characterized in that: Also includes: A positioning mechanism (20), the positioning mechanism (20) comprising a rivet head (21) slidably connected to the bottom end of the upper die seat (13), a return spring (22) being provided between the rivet head (21) and the upper die seat (13), a connecting rod (23) being fixedly connected to the interior of the upper die seat (13), an extrusion block (24) being fixed to the bottom end of the connecting rod (23), an inner support plate (25) being elastically connected to the interior of the extrusion block (24), and a pushing assembly (26) being provided at the bottom of the rivet head (21); The pushing assembly (26) comprises a mounting cylinder (261), the interior of the mounting cylinder (261) being slidably connected to a spring telescopic rod (262), and a spring 1 (263) being provided between the spring telescopic rod (262) and the mounting cylinder (261); During the downward pressing process of the extrusion block (24), the spring telescopic rod (262) and the inner support plate (25) are used to respectively support and position the rivet hole and the rivet nut.

2. A riveting device for the production of distribution boxes according to claim 1, characterized in that: It also includes a constraint unit (30), the constraint unit (30) including a support ring (31) movably connected to the bottom end of the rivet head (21) and slidably connected to the mounting tube (261), the diameter of the support ring (31) being equal to the diameter of the rivet hole, a second spring (32) being provided between the support ring (31) and the rivet head (21), the support ring (31) being located inside the rivet hole to support and constrain the material.

3. The riveting device for the production of distribution boxes according to claim 1 is characterized in that: It also includes a leveling unit (40), the leveling unit (40) including a protruding rod (41) fixed to the top of the support ring (31), a spiral guide groove is provided on the outside of the connecting rod (23), the protruding rod (41) is embedded in the guide groove, and a chip removal groove is provided on the inner wall of the top end of the lower die seat (12).

4. A riveting device for the production of distribution boxes according to claim 3, characterized in that: The bottom of the mounting cylinder (261) is movably connected to a friction plate (42), and the friction plate (42) comprises two groups of convex teeth (421) fixed to the upper surface of the friction plate (42) and inside the mounting cylinder (261).

5. The riveting device for the production of distribution boxes according to claim 1 is characterized in that: An auxiliary ejection assembly (50) is arranged inside the lower die base (12), and the auxiliary ejection assembly (50) comprises a sliding member (51) slidably connected to the interior of the lower die base (12), a spring three (52) is arranged at the bottom of the sliding member (51), and an ejection member (53) sealed to the inner wall of the lower die base (12) is slidably connected inside the sliding member (51).

6. The riveting device for the production of distribution boxes according to claim 5 is characterized in that: A discharge channel is provided inside the lower die base (12), and the top of the ejector (53) is conical.

7. The riveting device for the production of distribution boxes according to claim 5 is characterized in that: An electromagnet (54) is fixedly mounted on the bottom of the extrusion block (24).

8. The riveting device for the production of distribution boxes according to claim 2 is characterized in that: The top of the support ring (31) is rotatably connected to an annular member fixed to the bottom end of the second spring (32).

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