A non-porous rivet structure

Abstract

The application discloses a non-porous riveting structure which comprises an upper die mechanism and a lower die mechanism, and a lower riveting component is arranged on the lower die mechanism, wherein the lower riveting component comprises an insert, a first spring and a lower riveting punch; the insert is arranged on the lower die mechanism, a first mounting groove is arranged in the insert, and the first spring is arranged in the first mounting groove; one end of the first spring is connected with the insert, and the other end of the first spring is connected with the lower riveting punch; a first product is arranged above the lower riveting punch, a protruding part protruding upwards is arranged on the first product, the top of the lower riveting punch abuts against the bottom of the protruding part; a second product is arranged on the first product, a salad hole is arranged on the second product, and the protruding part is arranged in the salad hole; and an upper riveting component is arranged above the protruding part. The application can make up for the defects of the previous riveting structure, so that the product is safe and reliable after riveting, the surface is more smooth, the safety hidden danger caused by the traditional riveting is avoided, and the quality of the product is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of riveting technology, and more particularly to a hole-free riveting structure. Background Technology

[0002] In sheet metal stamping die technology, especially in the server field, components are often assembled by means of screw connection, riveting connection, laser welding, etc. However, screw connection and laser welding often incur high costs. In the past, riveting was usually the preferred option in practical applications. However, traditional riveting process will create through holes after riveting, which will pose safety hazards to some special components, especially in the server field. Because the traditional riveting structure (flip hole + slatted hole riveting) will create through holes after riveting, the existence of through holes will pose safety hazards during the use of components. For example, dust, iron filings, liquids and other substances can easily enter the chassis through the through holes created after riveting, which will cause short circuits or damage to the chassis circuit board. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a hole-free riveting structure, which makes up for the deficiencies of previous riveting structures, thereby making the product safe and reliable after riveting, with a smoother surface, avoiding the safety hazards caused by traditional riveting, and effectively improving the quality of the product.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a hole-free riveting structure, comprising an upper die mechanism and a lower die mechanism, wherein the lower die mechanism is disposed below the upper die mechanism, and a lower riveting component is disposed on the lower die mechanism. The lower riveting component includes an insert, a first spring, and a lower riveting punch. The insert is disposed on the lower die mechanism, and a first mounting groove is disposed within the insert. The first spring is housed within the first mounting groove, one end of the first spring is connected to the insert, and the other end of the first spring is connected to the lower riveting punch. A first product is disposed above the lower riveting punch, and the first product has an upwardly protruding protrusion. The top of the riveting punch abuts against the bottom of the protrusion. A second product is provided on the first product, and a salad hole is provided on the second product. The protrusion is located in the salad hole. An upper riveting component is provided above the protrusion. The upper riveting component is connected to the upper die mechanism. The upper riveting component includes an upper riveting punch, a second spring, and a first clamping block. The upper riveting punch is connected to the upper die mechanism. A connecting disc is provided on the upper riveting punch. The first clamping block is located below the connecting disc and is slidably connected to the upper riveting punch. The first clamping block is connected to the connecting disc by several second springs.

[0005] As a further description of the above technical solution:

[0006] The bottom end of the upper riveting punch is a planar segment, and a conical segment is integrally and smoothly connected above the planar segment. A cylindrical segment is integrally and smoothly connected above the conical segment. The planar segment, the conical segment, and the cylindrical segment are arranged coaxially.

[0007] As a further description of the above technical solution:

[0008] The connecting disc is fixedly connected to the cylindrical section, and the first clamping block is slidably connected to the cylindrical section.

[0009] As a further description of the above technical solution:

[0010] The upper riveting punch is provided with a second mounting groove, and a third spring is provided in the second mounting groove. The other end of the third spring is connected to a second clamping block. One end of the second clamping block extends out of the planar section. Lateral punches are provided on both sides of the second clamping block. The lateral punches are slidably connected in the second mounting groove. A fourth spring is provided between the lateral punches and the upper riveting punch. The riveting punch is provided with a through hole for the lateral punches to enter and exit.

[0011] As a further description of the above technical solution:

[0012] The protrusion is provided with a positioning groove, and the bottom of the second clamping block is inserted into the positioning groove.

[0013] As a further description of the above technical solution:

[0014] The connecting disc is provided with multiple pressure rods, which are arranged circumferentially along the connecting disc, and the second spring is sleeved on the pressure rods.

[0015] As a further description of the above technical solution:

[0016] The upper mold mechanism includes an upper mold base, an upper clamping plate, a stop plate, and a stripper plate arranged sequentially from top to bottom.

[0017] As a further description of the above technical solution:

[0018] The lower mold mechanism includes a lower template, a lower mold base, pads, and a lower locking plate arranged sequentially from top to bottom.

[0019] As a further description of the above technical solution:

[0020] The second product is provided with multiple connecting grooves, which are located on the side wall of the salad hole.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. In this invention, the salad hole on the second product and the protrusion on the first product form a special riveting state under the action of the lower riveting component and the upper riveting component, and no through hole is formed, thus achieving the quality requirements of safety and reliability.

[0023] 2. In this invention, an insert is provided on the lower mold mechanism, and a first mounting groove is opened in the insert. The lower riveting punch is connected to the first mounting groove through a first spring. During riveting stamping, the first product is placed on the lower mold plate, and the top of the lower riveting punch abuts against the bottom surface of the protrusion. The riveting punch can fill the groove surface of the protrusion, preventing the protrusion from sinking into the middle and causing the protrusion to be squeezed to both sides for riveting. As the upper riveting punch continues to descend, the first spring is compressed. The lower riveting punch is in contact with the protrusion during its descent, which can ensure the flatness of the groove surface of the protrusion and prevent wrinkles. When the mold is opened, the first spring resets, causing the lower riveting punch to move upward and lift the riveted product, thus facilitating material removal.

[0024] 3. In this invention, by opening a second mounting groove inside the upper riveting punch, and installing a third spring and a second clamping block inside the second mounting groove, during riveting stamping, the second clamping block first contacts the protrusion to fix the first product. The second clamping block ensures that the upper riveting punch and the positioning groove remain coaxial. The positioning groove is located at the center of the protrusion, making the protrusion evenly stressed and improving the riveting quality. As the upper die mechanism descends, the third spring is compressed, and the bottom of the second clamping block moves towards the second mounting groove, until the bottom of the second clamping block is flush with the bottom of the upper riveting punch. The stamping and riveting process begins, with the protrusion deforming to both sides. The first clamping block restricts the upward movement of the protrusion, acting as a limit and providing reverse extrusion force to ensure a tighter riveting between the slot and the protrusion. It also ensures the flatness of the surface of the deformed protrusion. As the upper die mechanism continues to descend, the pressure rod moves down and presses against the first clamping block, causing the first clamping block to further compress the deformed protrusion below it, achieving a flattening effect. This avoids the need for subsequent processing and flattening, improving the quality and efficiency of riveting.

[0025] 4. In this invention, lateral pressure blocks are provided on both sides of the second pressing block. When the second pressing block moves upward, it squeezes the lateral pressure blocks, causing the two lateral pressure blocks to move to the sides respectively. The lateral pressure blocks exert lateral pressure on the protrusion, thereby making the protrusion and the salad hole fit more tightly and reducing the gap between them. After riveting, the second pressing block returns to its original position under the action of the third spring, and the lateral pressure blocks also return to their original position under the action of the fourth spring. Through the provided connecting groove, during riveting, a part of the protrusion can enter the connecting groove, thereby making the connection between the first product and the second product more secure and less likely to fall off. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a hole-free riveting structure.

[0028] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0029] Figure 3 for Figure 2 Enlarged view of section B in the middle.

[0030] Figure 4 This is a partial structural diagram of the upper riveting component in a hole-free riveting structure.

[0031] Figure 5 This is a diagram showing the initial state of the first and second products being riveted together.

[0032] Figure 6 This is a schematic diagram of the structure of the second product in a hole-free riveting structure.

[0033] Figure 7 This is a schematic diagram of the first product in a hole-free riveting structure.

[0034] Figure 8 This is a reference diagram showing the riveting completed state of the first and second products of the present invention.

[0035] Figure 9 This is a reference diagram showing the completed riveting state of the existing first and second products.

[0036] Legend:

[0037] 1. Upper die mechanism; 11. Upper die base; 12. Upper clamping plate; 13. Stop plate; 14. Stripper plate; 2. Lower die mechanism; 21. Lower template; 22. Lower die base; 23. Pad; 24. Lower locking plate; 3. Lower riveting component; 31. Insert; 311. First mounting groove; 32. First spring; 33. Lower riveting punch; 4. First product; 41. Protrusion; 5. Second product; 51. Salad hole; 52. Connecting groove; 6. Upper riveting component; 61. Upper riveting punch; 611. Flat section; 612. Conical section; 613. Cylindrical section; 614. Second mounting groove; 62. Second spring; 63. First clamping block; 7. Connecting disc; 8. Third spring; 9. Second clamping block; 15. Side punch; 16. Fourth spring. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figure 1-8 This invention provides a technical solution: a holeless riveting structure, including an upper die mechanism 1 and a lower die mechanism 2. The lower die mechanism 2 is disposed below the upper die mechanism 1. A lower riveting component 3 is disposed on the lower die mechanism 2. The lower riveting component 3 includes an insert 31, a first spring 32, and a lower riveting punch 33. The insert 31 is disposed on the lower die mechanism 2, and a first mounting groove 311 is provided inside the insert 31. The first spring 32 is built into the first mounting groove 311. One end of the first spring 32 is connected to the insert 31, and the other end of the first spring 32 is connected to the lower riveting punch 33. A first product 4 is disposed above the lower riveting punch 33. The first product 4 is provided with an upwardly protruding protrusion 41. The lower riveting punch 33... The top of product 3 abuts against the bottom of protrusion 41. A second product 5 is provided on the first product 4. A salad hole 51 is provided on the second product 5. The protrusion 41 is located inside the salad hole 51. An upper riveting component 6 is provided above the protrusion 41. The upper riveting component 6 is connected to the upper mold mechanism 1. The upper riveting component 6 includes an upper riveting punch 61, a second spring 62, and a first clamping block 63. The upper riveting punch 61 is connected to the upper mold mechanism 1. A connecting disc 7 is provided on the upper riveting punch 61. The first clamping block 63 is located below the connecting disc 7. The first clamping block 63 is slidably connected to the upper riveting punch 61. The first clamping block 63 is connected to the connecting disc 7 by several second springs 62.

[0040] The bottom end of the upper riveting punch 61 is a flat section 611. A conical section 612 is integrally and smoothly connected above the flat section 611, and a cylindrical section 613 is integrally and smoothly connected above the conical section 612. The flat section 611, the conical section 612, and the cylindrical section 613 are arranged coaxially. The flat section increases the contact area, allowing the protrusion to be fully squeezed and deformed to both sides, improving the riveting quality. The conical section can act as a flange, and then it is flattened by the first clamping block.

[0041] The connecting disc 7 is fixedly connected to the cylindrical section 613, and the first clamping block 63 is slidably connected to the cylindrical section 613.

[0042] The upper riveting punch 61 has a second mounting groove 614, and a third spring 8 is installed in the second mounting groove 614. The other end of the third spring 8 is connected to a second clamping block 9. One end of the second clamping block 9 extends out of the planar section 611. Lateral punches 15 are respectively provided on both sides of the second clamping block 9. The lateral punches 15 are slidably connected in the second mounting groove 614. A fourth spring 16 is provided between the lateral punches 15 and the upper riveting punch 61. The riveting punch 61 has a through hole for the lateral punches 15 to enter and exit. The hole formed by the two lateral punches in the middle has a coarse-to-thin structure, which facilitates the second clamping block to squeeze the lateral punches to move to both sides during the up-and-down movement. A positioning groove is provided on the protrusion 41, and the bottom of the second clamping block 9 is inserted into the positioning groove. The positioning groove is located at the center of the protrusion. During riveting, firstly, the second clamping block contacts the protrusion to fix the first product. The second clamping block ensures that the upper riveting punch and the positioning groove remain coaxial. The positioning groove is located in the center of the protrusion, so that the protrusion is subjected to uniform force and the riveting quality is improved. As the upper die mechanism moves downward, the third spring is compressed, and the bottom of the second clamping block moves towards the second mounting groove. The bottom of the second clamping block is flush with the bottom of the upper riveting punch, and the stamping and riveting begins. When the die is opened, the third spring returns to its original position, which can push the riveted product away from the upper riveting punch, so as to facilitate material removal.

[0043] Multiple pressure rods 10 are provided on the connecting disc 7, arranged circumferentially along the connecting disc 7. The second spring 62 is sleeved on the pressure rods 10. When the upper riveting punch performs stamping and riveting, the protrusion deforms, and a portion of it pushes the first clamping block upward, causing the first clamping block to move upward a certain distance. As the upper riveting punch continues to move downward, the pressure rods press against the first clamping block, bringing the first clamping block down with it for stamping, thus achieving a leveling effect. After the mold is opened, the first clamping block can also push the product open, facilitating material removal.

[0044] The upper mold mechanism 1 includes an upper mold base 11, an upper clamping plate 12, a stop plate 13, and a stripper plate 14 arranged sequentially from top to bottom.

[0045] The lower mold mechanism 2 includes a lower mold plate 21, a lower mold base 22, a pad 23, and a lower locking plate 24 arranged from top to bottom.

[0046] The second product 5 is provided with multiple connecting grooves 52, which are located on the sidewall of the salad hole 51. The connecting grooves are circular or polygonal, specifically irregular in shape, to prevent the protrusions entering the connecting grooves from slipping out, thereby making the connection between the first and second products more secure and less likely to detach.

[0047] Working principle: An insert is set on the lower die mechanism, and a first mounting groove is opened in the insert. The lower riveting punch is connected to the first mounting groove through a first spring. During riveting stamping, the first product is placed on the lower die plate, and the top of the lower riveting punch abuts against the bottom surface of the protrusion. The riveting punch can fill the groove surface of the protrusion, preventing the protrusion from concave in the middle and causing the protrusion to be squeezed to both sides for riveting. As the upper riveting punch continues to descend, the first spring is compressed. The lower riveting punch is in contact with the protrusion throughout its descent, ensuring the flatness of the groove surface of the protrusion and preventing wrinkles. When the die is opened, the first spring... The spring reset causes the lower riveting punch to move upward, lifting the riveted product for easy unloading. A second mounting groove is created inside the upper riveting punch, housing a third spring and a second clamping block. During riveting, the second clamping block first contacts the protrusion to secure the first product. The second clamping block ensures the upper riveting punch remains coaxial with the positioning groove, which is located at the center of the protrusion, resulting in even force distribution and improved riveting quality. As the upper die mechanism descends, the third spring compresses, causing the bottom of the second clamping block to move towards the second mounting groove. The bottom of the second clamping block then... The bottom of the upper riveting punch is flush with the ground, and the riveting process begins. The protrusion is deformed by being squeezed to both sides. The first clamping block restricts the upward movement of the protrusion, acting as a limiter, and simultaneously provides reverse extrusion force, making the riveting between the slot and the protrusion tighter. It also ensures the flatness of the surface of the deformed protrusion. As the upper die mechanism continues to descend, the pressure rod descends and abuts against the first clamping block, causing the first clamping block to further squeeze the deformed protrusion below it, achieving a flattening purpose. This avoids the need for subsequent flattening processing, improving riveting quality and efficiency. The second clamping... Lateral pressure blocks are provided on both sides of the block. When the second pressing block moves upward, it squeezes the lateral pressure blocks, causing the two lateral pressure blocks to move to the sides respectively. The lateral pressure blocks exert lateral pressure on the protrusion, which makes the protrusion and the salad hole fit more tightly and reduces the gap between them. After riveting, the second pressing block returns to its original position under the action of the third spring, and the lateral pressure blocks also return to their original position under the action of the fourth spring. Through the set connecting groove, during riveting, a part of the protrusion can enter the connecting groove, which makes the connection between the first product and the second product more secure and less likely to fall off.

[0048] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hole-free riveting structure, characterized in that, The device includes an upper mold mechanism (1) and a lower mold mechanism (2). The lower mold mechanism (2) is located below the upper mold mechanism (1). A lower riveting component (3) is provided on the lower mold mechanism (2). The lower riveting component (3) includes an insert (31), a first spring (32), and a lower riveting punch (33). The insert (31) is located on the lower mold mechanism (2). A first mounting groove (311) is provided inside the insert (31). The first spring (32) is built into the first mounting groove (311). One end of the first spring (32) is connected to the insert (31), and the other end of the first spring (32) is connected to the lower riveting punch (33). A first product ( 4) The first product (4) is provided with an upwardly protruding protrusion (41), the top of the lower riveting punch (33) abuts against the bottom of the protrusion (41), the first product (4) is provided with a second product (5), the second product (5) is provided with a salad hole (51), the protrusion (41) is located in the salad hole (51), an upper riveting component (6) is provided above the protrusion (41), the upper riveting component (6) is connected to the upper die mechanism (1), the upper riveting component (6) includes an upper riveting punch (61), a second spring (62) and a first clamping block (63), the upper riveting punch (61) is connected to the upper die mechanism (1), and the upper riveting punch (61) is provided with A connecting disc (7) is provided, with the first clamping block (63) located below the connecting disc (7). The first clamping block (63) is slidably connected to the upper riveting punch (61). The first clamping block (63) is connected to the connecting disc (7) by several second springs (62). The bottom end of the upper riveting punch (61) is a flat section (611). A conical section (612) is integrally and smoothly connected above the flat section (611). A cylindrical section (613) is integrally and smoothly connected above the conical section (612). The flat section (611), the conical section (612), and the cylindrical section (613) are arranged coaxially. The connecting disc (7) is fixedly connected to the cylindrical section (613). The first clamping block (63) is slidably connected to the cylindrical section (613). The upper riveting punch (61) is provided with a second mounting groove (614). The second mounting groove (614) is provided with a third spring (8). The other end of the third spring (8) is connected to the second clamping block (9). One end of the second clamping block (9) extends out of the planar section (611). Side punches (15) are provided on both sides of the second clamping block (9). The side punches (15) are slidably connected in the second mounting groove (614). A fourth spring (16) is provided between the side punches (15) and the upper riveting punch (61). The riveting punch (61) is provided with a through hole for the side punches (15) to enter and exit.A positioning groove is provided on the protrusion (41), and the bottom of the second pressing block (9) is inserted into the positioning groove.

2. The hole-free riveting structure according to claim 1, characterized in that, Multiple pressure rods (10) are provided on the connecting disc (7), and the multiple pressure rods (10) are arranged around the circumference of the connecting disc (7). The second spring (62) is sleeved on the pressure rods (10).

3. The hole-free riveting structure according to claim 1, characterized in that, The upper mold mechanism (1) includes an upper mold base (11), an upper clamping plate (12), a stop plate (13), and a stripper plate (14) arranged from top to bottom.

4. The hole-free riveting structure according to claim 1, characterized in that, The lower mold mechanism (2) includes a lower mold plate (21), a lower mold base (22), a pad (23), and a lower locking plate (24) arranged from top to bottom.

5. The hole-free riveting structure according to claim 1, characterized in that, The second product (5) is provided with a plurality of connecting grooves (52), which are located on the side wall of the salad hole (51).

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