A floating riveting die head

Abstract

This utility model discloses a floating riveting die head, which uses a floating component that can move up and down in the base to naturally extend its lower end to form a positioning part. This effectively avoids rigid collisions caused by equipment or workpiece deviations, greatly reducing the risk of damage to the workpiece surface and the lower die. At the same time, the gap between the floating component and the inner wall of the perforation naturally forms a negative pressure air channel, which not only achieves reliable adsorption and fixation of the workpiece and prevents it from shifting and falling off, but also simplifies the overall structure, eliminating the need for additional complex sealing components or channel processing, and improving the reliability and service life of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of riveting equipment technology, and in particular to a floating riveting die head. Background Technology

[0002] Press riveting is a common joining process in sheet metal processing, mainly used to firmly press nuts, screws, and other fasteners onto thin sheet metal workpieces. This process is typically completed using specialized press riveting equipment with upper and lower dies. The lower die is fixed to the equipment's worktable to support the workpiece and the riveted parts; while the upper die is installed at the equipment's power output end, and its bottom usually has a positioning pin used to penetrate pre-punched holes in the workpiece or insert the riveted parts before operation, achieving rapid radial positioning and ensuring the accuracy of the press riveting position.

[0003] In existing technologies, to improve automation and operational efficiency, some upper molds integrate negative pressure adsorption functions. Specifically, air channels are machined inside the upper mold and connected to pneumatic equipment via air passages. During operation, the pneumatic equipment is activated, generating negative pressure (vacuum) at the bottom of the upper mold through the air channels. This aims to adsorb the workpiece onto the end face of the upper mold while the positioning pin completes its positioning, thereby preventing workpiece displacement or detachment during subsequent riveting processes and ensuring operational stability.

[0004] However, existing devices of this type still have several obvious drawbacks. First, the adsorption force they generate is often limited. For workpieces with slightly oily, uneven, or small surfaces, the adsorption effect is poor. The workpiece is still prone to slight displacement or tilting in the initial stage of pressure, leading to deviations in the final riveting position and affecting product quality. More importantly, existing positioning pins are usually rigidly connected to the upper mold body and do not have a floating buffer function. In actual operation, if the workpiece is placed slightly tilted or the downward trajectory of the equipment deviates slightly, the hard tip of the positioning pin will first impact the riveting part (such as a nut) placed on the lower mold or the surface of the workpiece. This rigid collision may not only leave scratches, indentations, and other damages on the workpiece surface, but more seriously, it may directly cause the positioning pin to chip, break, or damage the lower mold, increasing production losses and maintenance costs, and reducing the overall efficiency of the equipment.

[0005] Therefore, there is an urgent need for an upper mold solution that can provide more reliable adsorption and fixation capabilities and effectively avoid the problem of rigid collision damage to the positioning pins. Utility Model Content

[0006] The main purpose of this invention is to propose a floating riveting die head, which aims to provide a more reliable adsorption and fixing capability and effectively avoid the problem of rigid collision damage to the positioning pin.

[0007] To achieve the above objectives, this utility model proposes a floating riveting die head, including a base body, wherein a receiving cavity is provided inside the base body, and a connecting hole for connecting a pneumatic mechanism is provided at the top of the receiving cavity.

[0008] The bottom of the receiving cavity is provided with a vertically extending perforation, the inner diameter of the perforation is smaller than the inner diameter of the receiving cavity, and the lower end of the perforation penetrates the bottom wall of the base.

[0009] A floating component moves within the cavity. The lower end of the floating component is inserted into the perforation, and under the action of natural gravity, the positioning part at the lower end of the floating component extends out of the perforation and is exposed at the bottom of the base.

[0010] The upper end of the floating component is provided with a limiting part, which is used to abut against the bottom wall of the receiving cavity to prevent the floating component from falling out of the perforation;

[0011] The outer wall of the lower end of the floating component is spaced apart from the inner wall of the perforation, thereby forming a negative pressure air passage that connects the receiving cavity with the outside atmosphere.

[0012] Preferably, the floating element is cylindrical in shape to fit the perforation;

[0013] The negative pressure air passage is formed by at least one vertically extending through groove opened on the peripheral wall of the floating member.

[0014] Preferably, when there are multiple through slots, the multiple through slots are arranged in a circumferentially spaced manner on the floating member.

[0015] Preferably, the limiting portion consists of at least two protrusions distributed circumferentially along the floating member;

[0016] The position of the limiting part is offset from the through groove in the circumferential direction to avoid the limiting part from contacting the bottom wall of the receiving cavity and blocking the through groove.

[0017] Preferably, there are four limiting parts, which are circumferentially spaced at the upper end of the floating member and work together to form a limiting structure whose outer contour is adapted to the inner diameter of the receiving cavity.

[0018] The gap between two adjacent limiting parts is aligned with and connects to the upper opening of the through groove.

[0019] Preferably, the receiving cavity is provided with an elastic element, which is used to provide an elastic restoring force for the floating component.

[0020] Preferably, the base is composed of a separable upper cover and a lower base connected together, the receiving cavity is disposed in the lower base, and the connecting hole is disposed in the upper cover.

[0021] Preferably, the upper cover and the lower seat are locked by a threaded engagement or fixed by a snap-fit ​​structure.

[0022] This utility model's technical solution incorporates a floating component that can move up and down within the base, allowing its lower end to naturally extend outwards to form a positioning part. This effectively avoids rigid collisions caused by equipment or workpiece deviations, greatly reducing the risk of damage to the workpiece surface and lower mold. Simultaneously, the gap between the floating component and the perforated inner wall naturally forms a negative pressure air passage, achieving reliable adsorption and fixation of the workpiece and preventing its displacement and detachment. This simplifies the overall structure, eliminating the need for additional complex sealing components or channel processing, and improving the reliability and service life of the equipment. Attached Figure Description

[0023] Figure 1 This is a perspective view of the present utility model;

[0024] Figure 2 This is a bottom view of the present invention;

[0025] Figure 3 This is a cross-sectional view of the present invention;

[0026] Figure 4 This is a 3D view of the floating component. Detailed Implementation

[0027] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0028] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] This utility model proposes a floating riveting die head.

[0031] In this embodiment of the utility model, such as Figures 1 to 4 As shown, the floating riveting die head includes a base body, and the base body is provided with a receiving cavity 100. The top of the receiving cavity 100 is provided with a connecting hole 101 for connecting a pneumatic mechanism.

[0032] The bottom of the receiving cavity 100 is provided with a vertically extending perforation, the inner diameter of the perforation is smaller than the inner diameter of the receiving cavity 100, and the lower end of the perforation penetrates the bottom wall of the seat.

[0033] A floating component 1 is movable inside the receiving cavity 100. The lower end of the floating component 1 is inserted into the perforation, and the positioning part 200 at the lower end of the floating component 1 can extend out of the perforation and be exposed to the bottom of the seat under the action of natural gravity.

[0034] The upper end of the floating member 1 is provided with a limiting part 11, which is used to abut against the bottom wall of the receiving cavity 100 to prevent the floating member 1 from falling out of the perforation;

[0035] The outer wall of the lower end of the floating member 1 is spaced apart from the inner wall of the perforation, thereby forming a negative pressure airway 12 that connects the receiving cavity 100 with the outside atmosphere.

[0036] Specifically, the floating component 1 is cylindrical in shape to match the perforation;

[0037] The negative pressure air passage 12 is formed by at least one vertically extending through groove 13 opened on the periphery of the floating member 1.

[0038] Specifically, when there are multiple through grooves 13, the multiple through grooves 13 are arranged in a circumferentially spaced manner on the floating member 1.

[0039] Specifically, the limiting part 11 consists of at least two protrusions distributed circumferentially along the floating member 1;

[0040] The position of the limiting part 11 is offset from the through groove 13 in the circumferential direction to avoid the limiting part 11 contacting the bottom wall of the receiving cavity 100 and blocking the through groove 13.

[0041] Specifically, there are four limiting parts 11, which are arranged circumferentially at intervals on the upper end of the floating member 1, and together they form a limiting structure whose outer contour is adapted to the inner diameter of the receiving cavity 100.

[0042] The gap between two adjacent limiting parts 11 is directly opposite to and connects to the upper opening of the through groove 13.

[0043] Specifically, the receiving cavity 100 is provided with an elastic element, which is used to provide an elastic restoring force for the floating member 1.

[0044] Specifically, the seat body is composed of a separable upper cover 21 and a lower seat 22 connected together, the receiving cavity 100 is disposed in the lower seat 22, and the connecting hole 101 is disposed in the upper cover 21.

[0045] Specifically, the upper cover 21 and the lower seat 22 are locked by threaded engagement or fixed by a snap-fit ​​structure.

[0046] This utility model's technical solution incorporates a floating component that can move up and down within the base, allowing its lower end to naturally extend outwards to form a positioning part. This effectively avoids rigid collisions caused by equipment or workpiece deviations, greatly reducing the risk of damage to the workpiece surface and lower mold. Simultaneously, the gap between the floating component and the perforated inner wall naturally forms a negative pressure air passage, achieving reliable adsorption and fixation of the workpiece and preventing its displacement and detachment. This simplifies the overall structure, eliminating the need for additional complex sealing components or channel processing, and improving the reliability and service life of the equipment.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A floating riveting die head, characterized in that: Includes a base, the base having an internal cavity (100), and the top of the cavity (100) having a connection hole (101) for connecting a pneumatic mechanism. The bottom of the receiving cavity (100) is provided with a vertically extending perforation, the inner diameter of the perforation is smaller than the inner diameter of the receiving cavity (100) and the lower end of the perforation penetrates the bottom wall of the seat. A floating component (1) moves within the receiving cavity (100). The lower end of the floating component (1) is inserted into the perforation, and under the action of natural gravity, the positioning part (200) at the lower end of the floating component (1) extends out of the perforation and is exposed at the bottom of the seat. The upper end of the floating member (1) is provided with a limiting part (11) for abutting against the bottom wall of the receiving cavity (100) to prevent the floating member (1) from falling out of the perforation; The outer wall of the lower end of the floating member (1) is spaced apart from the inner wall of the perforation, thereby forming a negative pressure airway (12) that connects the receiving cavity (100) with the outside atmosphere.

2. The floating riveting die head as described in claim 1, characterized in that: The floating component (1) is cylindrical in shape to match the perforation; The negative pressure air passage (12) is formed by at least one vertically extending through groove (13) opened on the periphery of the floating member (1).

3. The floating riveting die head as described in claim 2, characterized in that: When there are multiple through grooves (13), the multiple through grooves (13) are arranged in a circumferentially spaced manner on the floating member (1).

4. The floating riveting die head as described in claim 2, characterized in that: The limiting part (11) consists of at least two protrusions distributed circumferentially along the floating member (1); The position of the limiting part (11) is offset from the through groove (13) in the circumferential direction to avoid the limiting part (11) from contacting the bottom wall of the receiving cavity (100) and blocking the through groove (13).

5. The floating riveting die head as described in claim 4, characterized in that: There are four limiting parts (11). The four limiting parts (11) are arranged circumferentially at intervals on the upper end of the floating member (1) and cooperate to form a limiting structure whose outer contour is adapted to the inner diameter of the receiving cavity (100). The gap between two adjacent limiting parts (11) is directly opposite to and connects to the upper opening of the through groove (13).

6. The floating riveting die head as described in claim 1, characterized in that: The receiving cavity (100) is provided with an elastic element, which is used to provide an elastic restoring force for the floating member (1).

7. The floating riveting die head as described in claim 1, characterized in that: The seat is composed of a separable upper cover (21) and a lower seat (22) connected together. The receiving cavity (100) is provided in the lower seat (22), and the connecting hole (101) is provided in the upper cover (21).

8. The floating riveting die head as described in claim 7, characterized in that: The upper cover (21) and the lower seat (22) are locked by threaded engagement or fixed by a snap-fit ​​structure.

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