Positioning structure for press riveting

Abstract

The utility model relates to a kind of positioning press riveting tool structure in the field of press riveting tool, including press riveting punch and press riveting bottom die, press riveting punch can be paired with press riveting bottom die and stamping die, the one end of press riveting bottom die close to press riveting punch is provided with stamping station, the top surface of stamping station is provided with the positioning clamping groove for placing positioning press riveting nut and press riveting product, press riveting bottom die is provided with the ejection assembly for pushing finished product away from positioning clamping groove in, can be accurately limited to press riveting nut and press riveting product, effectively avoid the deviation or misplacement in press riveting process, improve the press riveting quality and position consistency.Simultaneously, by setting ejection assembly in press riveting bottom die, finished product is automatically pushed away from positioning clamping groove by the restoring force of elastic member to push the top rod up after press riveting is completed, realizes fast, nondestructive stripping, significantly improves production efficiency, and reduces the product quality problem possibly caused by manual picking.

Description

Technical Field

[0001] This utility model relates to the field of riveting fixtures, and in particular to a positioning riveting fixture structure. Background Technology

[0002] A nut press-fit fixture is a specialized tool used to securely connect press-fit nuts to products via stamping. It is widely used in sheet metal processing, electronic equipment, and automotive parts manufacturing. This process involves pre-punching holes in the sheet metal or workpiece, placing the press-fit nut in the holes, and then using pressure equipment to cause plastic deformation, thereby achieving a mechanical connection between the nut and the workpiece.

[0003] Currently, common riveting fixtures typically consist of a riveting punch 1 and a riveting base 2, such as Figure 1 As shown, both are mostly simple cylindrical structures. In actual operation, the operator needs to place the riveting nut 3 and the product to be riveted 4 on the riveting base, relying on experience and feel to judge whether they are in place before stamping. This method has obvious defects: First, it lacks an effective positioning structure, which can easily lead to riveting position deviation or product deformation due to inaccurate alignment. Second, after riveting, the finished product often gets stuck in the lower mold due to deformation shrinkage or adsorption between the product and the mold, making it difficult to remove. This not only affects efficiency but also easily causes damage to the product surface. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a positioning and riveting fixture structure, which can effectively solve the technical problems of lack of positioning and difficulty in removing finished products.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A positioning and riveting fixture structure includes a riveting punch and a riveting bottom die. The riveting punch can be paired with the riveting bottom die for stamping and mold closing. The riveting bottom die is provided with a stamping table at one end near the riveting punch. The top surface of the stamping table is provided with a positioning slot for placing the positioning riveting nut and the riveting product. The riveting bottom die is provided with an ejection component for pushing the finished product away from the positioning slot.

[0007] The ejection assembly includes an ejector rod and an elastic element. The bottom die for riveting has an ejection cavity and an ejection hole. The ejection hole connects the ejection cavity and the positioning slot. The ejection hole is perpendicular to the bottom surface of the positioning slot. The ejector rod is set in the ejection cavity. One end of the ejector rod passes through the ejection hole and extends into the positioning slot. The ejector rod slides in contact with the ejection hole. The elastic element is set at the end of the ejector rod away from the positioning slot. When riveting is performed, the riveting punch presses downward, and the riveting nut and the riveted product are pressed together, pushing the ejector rod back into the ejection hole. When riveting is completed, the riveting punch rises, and the ejector rod is reset under the action of the elastic element, and the riveted product is ejected from the positioning slot.

[0008] Furthermore, the positioning slot is U-shaped, and a guide slope is provided between the side wall of the positioning slot and the stamping table.

[0009] Furthermore, a limiting cap is provided at the end of the push rod away from the positioning slot. The diameter of the limiting cap is larger than the diameter of the push rod, and the two ends of the elastic element are in contact with the limiting cap and the inner wall of the ejection cavity, respectively.

[0010] Furthermore, a positioning groove is provided at one end of the ejector cavity away from the ejector hole, one end of the elastic element is disposed in the positioning groove, and the other end extends to the ejector cavity to contact the ejector rod.

[0011] Furthermore, the pressing and riveting bottom mold is composed of a universal base and a quick-release fixture. The universal base is provided with a sliding groove at one end near the quick-release fixture, and the quick-release fixture is in the same shape as the sliding groove at one end near the universal base and is combined with the sliding groove.

[0012] Furthermore, the ejector cavity, positioning slot, and ejector rod are disposed in a quick-release fixture, and the elastic element is disposed in a universal base.

[0013] Compared with existing technologies, the advantages of this invention are as follows: By setting a stamping table with a positioning slot, the riveting nut and the riveted product can be precisely positioned, effectively preventing offset or misalignment during the riveting process, thus improving the riveting quality and positional consistency. Simultaneously, by setting an ejector assembly within the riveting die, the restoring force of the elastic element pushes the ejector rod upward after riveting, automatically pushing the finished product away from the positioning slot. This achieves rapid and non-destructive demolding, significantly improving production efficiency and reducing product quality issues that may arise from manual removal. Attached Figure Description

[0014] Figure 1 This is a perspective view of the prior art;

[0015] Figure 1 The labels in the text are: 1-riveting punch, 2-riveting base, 3-riveting nut, 4-riveting product.

[0016] Figure 2 This is a perspective view of the present utility model;

[0017] Figure 3 This is the front view of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of this utility model;

[0019] Figure 5 This is a structural schematic diagram of the riveting process in this utility model;

[0020] Figure 2-5The labels in the text are: 1-pressing punch, 2-pressing bottom die, 201-pressing table, 202-general base, 203-quick release fixture, 204-slide groove, 3-positioning slot, 301-guide slope, 4-ejector rod, 401-limit cap, 5-elastic element, 6-ejection cavity, 7-ejection hole, 8-positioning groove, 9-pressing nut, 10-pressing product. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The following is combined with Figures 2-5 A detailed description of a positioning and riveting fixture structure according to this utility model is provided below:

[0023] A positioning and riveting fixture structure includes a riveting punch 1 and a riveting bottom die 2. The riveting punch 1 can be paired with the riveting bottom die 2 for stamping and mold closing. The riveting bottom die 2 is provided with a stamping table 201 at one end near the riveting punch 1. The top surface of the stamping table 201 is provided with a positioning groove 3 for placing a positioning riveting nut 9 and a riveting product 10. The riveting bottom die 2 is provided with an ejection component for pushing the finished product away from the positioning groove 3.

[0024] The ejection assembly includes an ejector rod 4 and an elastic element 5. The riveting bottom mold 2 is provided with an ejection cavity 6 and an ejection hole 7. The ejection hole 7 connects the ejection cavity 6 and the positioning slot 3. The ejection hole 7 is perpendicular to the bottom surface of the positioning slot 3. The ejector rod 4 is set in the ejection cavity 6. One end of the ejector rod 4 passes through the ejection hole 7 and extends into the positioning slot 3. The ejector rod 4 slides in contact with the ejection hole 7. The elastic element 5 is set at the end of the ejector rod 4 away from the positioning slot 3. When the riveting operation is performed, the riveting punch 1 presses downward, and the riveting nut 9 and the riveting product 10 press together and push the ejector rod 4 back into the ejection hole 7. When the riveting is completed, the riveting punch 1 rises, and the ejector rod 4 is reset under the action of the elastic element 5, and the riveting product is ejected from the positioning slot 3.

[0025] By setting a stamping table 201 with a positioning slot 3, the riveting nut 9 and the riveted product 10 can be precisely positioned, effectively preventing offset or misalignment during the riveting process and improving the riveting quality and positional consistency. Simultaneously, by setting an ejector assembly within the riveting die 2, the restoring force of the elastic element 5 pushes the ejector rod 4 upwards after riveting, automatically pushing the finished product away from the positioning slot 3. This achieves rapid and non-destructive demolding, significantly improving production efficiency and reducing product quality issues that may arise from manual removal.

[0026] The positioning slot 3 is U-shaped. A guide slope 301 is provided between the side wall of the positioning slot 3 and the stamping table 201. The guide slope 301 can guide the workpiece to slide into the slot quickly and accurately, reducing the alignment time when manually placing it. It is especially suitable for rapid loading operations in mass production, while avoiding damage caused by rigid collision between the workpiece and the edge of the slot.

[0027] A limiting cap 401 is provided at the end of the push rod 4 furthest from the positioning slot 3. The diameter of the limiting cap 401 is larger than the diameter of the push rod 4. Both ends of the elastic element 5 contact the limiting cap 401 and the inner wall of the ejection cavity 6, respectively. The limiting cap 401 effectively limits the maximum ejection stroke of the push rod 4, preventing the push rod 4 from coming out of the ejection hole 7 due to excessive elastic force of the elastic element 5, thus ensuring the structural stability of the ejection assembly. The limiting cap 401 increases the contact area with the elastic element 5, allowing the force of the elastic element 5 to be transmitted more evenly to the push rod 4, reducing the sway of the push rod 4 during movement, ensuring smooth ejection, and avoiding lateral force on the riveted product that could cause deformation.

[0028] A positioning groove 8 is provided at the end of the ejection cavity 6 away from the ejection hole 7. One end of the elastic element 5 is disposed in the positioning groove 8, and the other end extends into the ejection cavity 6 to contact the push rod 4. The positioning groove 8 can radially limit the elastic element 5, preventing the elastic element 5 from shifting laterally, tilting, or twisting during compression or reset, ensuring that the elastic force is always transmitted along the axial direction of the push rod 4, and improving the operational reliability of the ejection assembly. The positioning groove 8 can also simplify the assembly process of the elastic element 5, ensuring the coaxiality of the elastic element 5 and the push rod 4 without additional adjustments, reducing assembly difficulty and labor costs.

[0029] Furthermore, the pressing and riveting bottom mold 2 is composed of a universal base 202 and a quick-release fixture 203. A groove 204 is provided at one end of the universal base 202 near the quick-release fixture 203. The shape of the quick-release fixture 203 near the universal base 202 is consistent with the groove 204, and they are combined in conjunction. The ejection cavity 6, positioning slot 3, and ejector rod 4 are disposed in the quick-release fixture 203, and the elastic element 5 is disposed within the universal base 202. This achieves a quick fixture replacement function. Through the cooperation of the groove 204, the quick-release fixture 203 can be disassembled and replaced simply by tapping it from the side, eliminating the cumbersome operations of loosening screws and adjusting the fixing groove in traditional structures, and significantly shortening the tooling adjustment time when switching between different product models.

[0030] Riveting steps:

[0031] 1. First, place the press-fit nut 9 and the press-fit product 10 into the positioning slot 3 in sequence;

[0032] 2. The riveting punch 1 comes down directly, and the processing surface is slightly higher than the stamping table 201 to ensure that each step is pressed in place, pressing the nut into the product, and at the same time pushing the push rod 4 to compress the spring;

[0033] 3. After the riveting is completed, the riveting punch 1 returns to its original position, the spring releases the pressure, and the push rod 4 pushes the product upwards out of the fixture by 1.0-2.0mm, making it easy to unload the material. At the same time, it avoids the finished product being ejected from the fixture or the push rod 4 interfering with the riveting punch 1 due to excessive ejection stroke, thus balancing the reliability of unloading and the safety of operation.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A positioning and riveting fixture structure, comprising a riveting punch and a riveting die, wherein the riveting punch can be paired with the riveting die for stamping and mold closing, characterized in that: The bottom die of the riveting mold is provided with a stamping table at one end near the riveting punch. The top surface of the stamping table is provided with a positioning slot for placing the positioning riveting nut and the riveting product. The bottom die of the riveting mold is provided with an ejection component for pushing the finished product away from the positioning slot. The ejection assembly includes an ejector rod and an elastic element. The bottom die for riveting has an ejection cavity and an ejection hole. The ejection hole connects the ejection cavity and the positioning slot. The ejection hole is perpendicular to the bottom surface of the positioning slot. The ejector rod is set in the ejection cavity. One end of the ejector rod passes through the ejection hole and extends into the positioning slot. The ejector rod slides in contact with the ejection hole. The elastic element is set at the end of the ejector rod away from the positioning slot. When riveting is performed, the riveting punch presses downward, and the riveting nut and the riveted product are pressed together, pushing the ejector rod back into the ejection hole. When riveting is completed, the riveting punch rises, and the ejector rod is reset under the action of the elastic element, and the riveted product is ejected from the positioning slot.

2. The positioning and riveting fixture structure according to claim 1, characterized in that: The positioning slot is U-shaped, and a guide slope is provided between the side wall of the positioning slot and the stamping table.

3. The positioning and riveting fixture structure according to claim 1, characterized in that: A limit cap is provided at the end of the push rod away from the positioning slot. The diameter of the limit cap is larger than the diameter of the push rod. The two ends of the elastic element are in contact with the limit cap and the inner wall of the ejection cavity, respectively.

4. A positioning and riveting fixture structure according to any one of claims 1-3, characterized in that: A positioning groove is provided at one end of the ejector cavity away from the ejector hole. One end of the elastic element is located in the positioning groove, and the other end extends into the ejector cavity to contact the ejector rod.

5. A positioning and riveting fixture structure according to any one of claims 1-3, characterized in that: The riveting bottom mold consists of a universal base and a quick-release fixture. The universal base has a sliding groove at one end near the quick-release fixture, and the quick-release fixture has the same shape as the sliding groove at one end near the universal base and is combined with the sliding groove.

6. The positioning and riveting fixture structure according to claim 5, characterized in that: The ejector cavity, positioning slot, and ejector rod are disposed in the quick-release fixture, and the elastic element is disposed in the universal base.

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