Die structure for riveting nut on inner wall of U-shaped part
By combining the design of the lower die mechanism and the upper die mechanism, and by matching the riveting punch and the rivet post, the problem of poor hole accuracy during the riveting process of U-shaped parts is solved, and higher hole shape accuracy is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-17
AI Technical Summary
In the existing technology, U-shaped parts have poor hole accuracy and are prone to shaking during the riveting process due to unstable center of gravity, which affects the shape accuracy of the hole.
The design employs a combination of a lower die mechanism and an upper die mechanism. Through the matching design of the riveting punch and the rivet post, the riveting punch first contacts the U-shaped part for initial positioning, and then the upper die plate gradually fits into the U-shaped part, replacing the direct overall pressing and improving the hole forming accuracy.
By combining the design of the riveting punch and the rivet post, the accuracy of the riveting hole of the U-shaped part is improved, the shaking caused by the unstable center of gravity is avoided, and the shape accuracy of the hole is ensured.
Smart Images
Figure CN223997739U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a riveting fixture, and more particularly to a mold structure for riveting nuts to the inner wall of a U-shaped part. Background Technology
[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.
[0003] There is a U-shaped part that needs to have holes of a predetermined shape riveted to its edges. In the existing technology, the U-shaped part is generally initially placed in a mold, the top surface of the U-shaped part is pressed by the upper template, and the part to be processed is pressed and riveted by the rivet post of the predetermined size until the corresponding hole is formed.
[0004] Because the holes are relatively fine and are located at the edge of the U-shaped part, the center of gravity of the U-shaped part itself is unstable. During the extrusion process, when the entire upper template is directly attached to the U-shaped part, uneven force is likely to occur, resulting in wobbling and poor final punching accuracy.
[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content
[0006] The purpose of this invention is to provide a mold structure for riveting nuts to the inner wall of a U-shaped part. By setting riveting punches with matching positions and sizes on the upper mold mechanism, the punches first contact the part to be riveted during riveting, thereby improving the accuracy of hole forming.
[0007] To achieve the above objectives, this utility model discloses a mold structure for riveting nuts on the inner wall of a U-shaped part, the mold structure comprising:
[0008] The lower mold mechanism includes a lower template and a rivet post. The lower template has a first surface and a second surface that are disposed opposite to each other. The rivet post is mounted on the lower template, and at least a portion of the rivet post protrudes beyond the second surface of the lower template, forming a rivet post protrusion.
[0009] The upper mold mechanism includes an upper template and a riveting punch. The upper template has a first surface and a second surface that are disposed opposite to each other. The first surface of the upper template faces the second surface of the lower template. The riveting punch is mounted on the upper template, and at least a portion of the riveting punch protrudes beyond the first surface of the upper template, forming a riveting punch protrusion.
[0010] The lower template and the upper template are used to clamp the U-shaped part together. The horizontal position of the rivet post protrusion matches the position of the riveting punch protrusion. The rivet post has a through hole, which is used to allow at least part of the riveting punch protrusion to enter when the lower mold mechanism and the upper mold mechanism are closed.
[0011] As a further description of the above technical solution, the lower mold mechanism also includes a first positioning post, which is installed on the lower mold plate and at least a portion of the first positioning post passes through the through hole of the rivet post. The first positioning post is used to position the rivet post.
[0012] As a further description of the above technical solution, the first positioning post has sufficient length so that when the lower mold mechanism and the upper mold mechanism are closed, the end of the first positioning post just abuts against the riveting punch protrusion.
[0013] As a further description of the above technical solution, the first positioning post, which passes through the through hole of the rivet post, has a smaller diameter, so that at least a portion of the bottom of the rivet post abuts against the first positioning post.
[0014] As a further description of the above technical solution, the protrusion of the riveting punch protruding from the first surface of the upper template is 0.02mm.
[0015] As a further description of the above technical solution, the diameter of the riveting punch protrusion matches the diameter of the through hole of the rivet post, so that the riveting punch protrusion is automatically adapted and positioned by the through hole of the rivet post during riveting.
[0016] As a further description of the above technical solution, the lower mold mechanism also includes a second positioning post, which is installed on the lower mold plate. The U-shaped part has a positioning hole, and at least a portion of the second positioning post passes through the positioning hole of the U-shaped part. The second positioning post is used to position the U-shaped part.
[0017] Based on the above technical solution, the beneficial effects of this utility model are as follows:
[0018] The mold structure for riveting nuts on the inner wall of U-shaped parts of this utility model can be achieved by setting riveting punches with matching positions and sizes on the upper mold mechanism. During riveting, the protruding part of the riveting punch first contacts the part to be riveted on the U-shaped part, and then the bottom surface of the upper mold plate is pressed down to gradually fit into the U-shaped part. This replaces the existing method of directly pressing down the entire bottom surface of the upper mold plate to contact the U-shaped part, thus improving the hole forming accuracy.
[0019] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a cross-sectional schematic diagram of a mold structure for riveting nuts on the inner wall of a U-shaped part, as provided in the embodiments of this specification.
[0022] Figure 2 This is a three-dimensional schematic diagram of a mold structure for riveting nuts on the inner wall of a U-shaped part, as provided in the embodiments of this specification.
[0023] In the picture:
[0024] 100. U-shaped parts;
[0025] 1. Lower mold mechanism; 11. Lower template; 12. Riveting post; 13. First positioning post; 14. Second positioning post;
[0026] 2. Upper mold mechanism; 21. Upper template; 22. Riveting punch. Detailed Implementation
[0027] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.
[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.
[0029] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.
[0030] Please see Figure 1-2 This embodiment provides a mold structure for riveting nuts to the inner wall of a U-shaped part. The mold structure for riveting nuts to the inner wall of the U-shaped part includes:
[0031] The lower mold mechanism 1 includes a lower mold plate 11 and a rivet 12. The lower mold plate 11 has a first surface and a second surface that are arranged opposite to each other. The rivet 12 is installed on the lower mold plate 11, and at least part of the rivet 12 protrudes out of the second surface of the lower mold plate, forming a rivet protrusion.
[0032] The upper mold mechanism 2 includes an upper template 21 and a riveting punch 22. The upper template 21 has a first surface and a second surface that are arranged opposite to each other. The first surface of the upper template 21 is arranged facing the second surface of the lower template 11. The riveting punch 22 is installed on the upper template 21, and at least part of the riveting punch 22 protrudes outside the first surface of the upper template 21, forming a riveting punch protrusion.
[0033] The lower template 11 and the upper template 21 are used to clamp the U-shaped part 100 between them. The horizontal position of the rivet protrusion matches the position of the riveting punch protrusion. The rivet 12 has a through hole, which is used to allow at least part of the riveting punch protrusion to enter when the lower mold mechanism 1 and the upper mold mechanism 2 are closed.
[0034] With the above structure, during use, the operator only needs to place the U-shaped part 100 in advance between the lower mold mechanism 1 and the upper mold mechanism 2. Specifically, the top and bottom surfaces of the U-shaped part 100 to be riveted face the rivet post 12 and the riveting punch 22. During the riveting process, the protruding part of the rivet post abuts against the bottom surface of the U-shaped part 100, and simultaneously, the protruding part of the riveting punch abuts against the top surface of the U-shaped part 100. This causes the part of the U-shaped part 100 to be riveted to undergo partial deformation under the pressure from above and below, and the hole shape of the part of the U-shaped part 100 to be riveted gradually expands. Further, after the protruding part of the riveting punch presses the U-shaped part 100 to a certain extent, the second surface of the upper mold plate 21 fits against the U-shaped part 100. Then, after the protruding part of the rivet post presses the U-shaped part 100 to a certain extent, the first surface of the lower mold plate 11 fits against the U-shaped part 100 until they are completely fitted, and finally the riveted hole is formed.
[0035] In the above-described process, by setting a riveting punch 22 with matching position and size on the upper die mechanism 2, during riveting, the protruding part of the riveting punch 22 first contacts the part to be riveted on the U-shaped part 100, and then the bottom surface of the upper die 21 is pressed down to gradually fit against the U-shaped part. This replaces the existing method of directly pressing down the entire bottom surface of the upper die 21 to contact the U-shaped part 100, thus improving the hole forming accuracy. In other words, in the initial stage of riveting, the initial contact of the protruding part of the riveting punch actually forms a positioning of the riveting position of the U-shaped part 100, and the positioning effect is even greater due to the friction of the material during the gradual application of force.
[0036] Furthermore, the lower die mechanism 1 also includes a first positioning post 13, which is mounted on the lower die plate 11, and at least a portion of the first positioning post 13 passes through the through hole of the rivet post 12. The first positioning post 13 is used to position the rivet post 12. Specifically, the first positioning post 13 has sufficient length so that when the lower die mechanism 1 and the upper die mechanism 2 are closed, the end of the first positioning post 13 just abuts against the protruding part of the riveting punch. Therefore, with the presence of the first positioning post 13, the rivet post 12 can be limited and pressed into a fixed position on the lower die plate 11, preventing movement during the riveting process. At the same time, the first positioning post 13 passing through the through hole of the rivet post 12 has a smaller diameter so that at least a portion of the bottom of the rivet post 12 abuts against the first positioning post 13. In effect, the first positioning post 13 forms an annular step for placing the rivet post 12, making the rivet post 12 more stably fixed.
[0037] Furthermore, the protrusion of the riveting punch protrudes 0.02mm from the first surface of the upper template 21. In fact, the protrusion of the riveting punch only needs to protrude by a very small size to play an auxiliary positioning role. Ultimately, the upper template 21 still needs to press the U-shaped part 100 after deformation to avoid affecting the subsequent forming of the hole.
[0038] Furthermore, the diameter of the riveting punch protrusion is the same as the diameter of the through hole of the rivet 12. Therefore, after the riveting die is closed, the riveting punch protrusion can be pressed into the through hole of the rivet 12 to achieve a positioning or guiding effect.
[0039] Furthermore, the lower mold mechanism 1 also includes a second positioning post 14, which is mounted on the lower mold plate 11. The U-shaped part 100 has a positioning hole, and at least part of the second positioning post 14 passes through the positioning hole of the U-shaped part 100. The second positioning post 14 is used to position the U-shaped part 100. With the auxiliary positioning of the second positioning post 14, the U-shaped part 100 itself can be prevented from shifting at a large angle.
[0040] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.
[0041] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.
[0042] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.
Claims
1. A mold structure for riveting nuts to the inner wall of a U-shaped part, characterized in that, The die structure for riveting the nut on the inner wall of the U-shaped part comprises: a lower die mechanism comprising a lower die plate having first and second opposite faces and a rivet post mounted on the lower die plate and at least partially protruding beyond the second face of the lower die plate to form a rivet post protrusion; an upper die mechanism comprising an upper die plate having first and second opposite faces with the first face of the upper die plate facing the second face of the lower die plate and a riveting punch mounted on the upper die plate and at least partially protruding beyond the first face of the upper die plate to form a riveting punch protrusion; wherein the lower die plate and the upper die plate are used to jointly clamp the U-shaped part therebetween, the horizontal position of the rivet post protrusion matches the position of the riveting punch protrusion, and the rivet post has a through hole for allowing at least part of the riveting punch protrusion to enter when the lower die mechanism and the upper die mechanism are closed.
2. The die structure for riveting a nut to the inner wall of a U-shaped member according to claim 1, characterized in that: The lower die mechanism further comprises a first positioning post mounted on the lower die plate and at least partially penetrating the through hole of the rivet post, and the first positioning post is used to position the rivet post.
3. The die structure for riveting a nut to the inner wall of a U-shaped member according to claim 2, characterized in that: The first positioning post has a sufficient length so that the end of the first positioning post just abuts against the riveting punch protrusion when the lower die mechanism and the upper die mechanism are closed.
4. The die structure for riveting the nut to the inner wall of the U-shaped member according to claim 2, characterized in that: The first positioning post penetrating the through hole of the rivet post has a smaller diameter so that at least part of the bottom of the rivet post abuts against the first positioning post.
5. The die structure for riveting the nut to the inner wall of the U-shaped part according to claim 1, characterized in that: The riveting punch protrusion protrudes from the first face of the upper die plate by a size of 0.02 mm.
6. The die structure for riveting the nut to the inner wall of the U-shaped member according to claim 1, characterized in that: The diameter of the riveting punch protrusion matches the hole diameter of the through hole of the rivet post so that the riveting punch protrusion is automatically fitted and positioned by the through hole of the rivet post when riveting.
7. The die structure for riveting the nut to the inner wall of the U-shaped member according to claim 1, characterized by: The lower die mechanism further comprises a second positioning post mounted on the lower die plate, the U-shaped part has a positioning hole, at least part of the second positioning post penetrates the positioning hole of the U-shaped part, and the second positioning post is used to position the U-shaped part.