A riveting tool for preventing deformation of the connector holes on a workpiece during riveting of riveting screws

Abstract

The present invention discloses a riveting tool for preventing the deformation of the plug hole on a workpiece, which comprises an upper die assembly and a lower die assembly. The upper die assembly includes a main shaft, a push plate, an anti-expansion pin, a spring and an upper positioning seat. The main shaft extends downward from the upper positioning seat through to the push plate. A guiding hole corresponding to the main shaft is concavely arranged on the top surface of the push plate. A first avoidance hole communicating with the guiding hole and corresponding to the anti-expansion pin is concavely arranged on the bottom surface of the push plate. The anti-expansion pin is arranged at the bottom of the main shaft and located in the first avoidance hole. The spring is sleeved on the main shaft and located between the push plate and the upper positioning seat. The lower die assembly includes a lower positioning seat. A second avoidance hole corresponding to the anti-expansion pin and a guiding cone is concavely arranged on the top surface of the lower positioning seat. By the above method, the riveting tool for preventing the deformation of the plug hole on a workpiece of the present invention avoids the deformation of the plug hole and improves the firmness of the riveted screw.

Description

Technical Field

[0001] The present invention relates to the technical field of press riveting screw installation, and particularly to a press riveting tooling for press riveting screws to prevent deformation of the connector holes on workpieces. Background Art

[0002] Currently, the process of press riveting screws on sheet metal is used in workpieces in many fields such as the automotive industry, new energy industry, and security industry. Some workpieces need to be provided with an assembly structure that cooperates with electrical connectors, such as connector holes.

[0003] The distance between the installation position of the press riveting screw and the connector hole on some workpieces is very close, far lower than the distance required for conventional press riveting. When press riveting the press riveting screw on the workpiece according to the conventional process, the press riveting screw will extrude and expand the surrounding sheet metal material, causing the nearby connector holes to be subjected to external forces and resulting in plastic deformation, and further causing the body of the connector to be unable to pass through and be installed normally. In addition, the deformation of the connector hole often results in insufficient push-out force and torque of the press riveted screw, and the values that can be achieved by normal press riveting cannot be reached, and there is a risk of screw rotation and detachment. Summary of the Invention

[0004] The main technical problem to be solved by the present invention is to provide a press riveting tooling for press riveting screws to prevent deformation of the connector holes on workpieces, improve the installation efficiency and reliability of press riveting screws on workpieces, and avoid deformation of the connector holes on workpieces.

[0005] To solve the above technical problem, a technical solution adopted by the present invention is: to provide a press riveting tooling for press riveting screws to prevent deformation of the connector holes on workpieces, including: an upper die assembly and a lower die assembly. The upper die assembly includes a main shaft, a push plate, an anti-expansion pin, a spring, and an upper positioning seat. The push plate is arranged below the upper positioning seat in a relatively liftable manner. The main shaft extends downward from the upper positioning seat through the push plate. A guiding hole corresponding to the main shaft is concavely arranged on the top surface of the push plate. A first avoidance hole corresponding to the guiding hole and the anti-expansion pin is concavely arranged on the bottom surface of the push plate. The anti-expansion pin is arranged at the bottom of the main shaft and located in the first avoidance hole. A guiding cone pointing downward is arranged at the bottom of the anti-expansion pin. The spring is sleeved on the main shaft and located between the push plate and the upper positioning seat. The lower die assembly includes a lower positioning seat. A second avoidance hole corresponding to the anti-expansion pin and the guiding cone is concavely arranged on the top surface of the lower positioning seat. Positioning holes corresponding to the press riveting screws one by one are arranged in the lower positioning seat.

[0006] In a preferred embodiment of the present invention, the lower die assembly further includes a lower mounting handle located below the lower positioning seat.

[0007] In a preferred embodiment of the present invention, the top of the lower mounting handle is connected to the bottom of the lower positioning seat by a threaded manner.

[0008] In a preferred embodiment of the present invention, an installation hole corresponding to the spring is concavely provided inside the bottom of the upper positioning seat.

[0009] In a preferred embodiment of the present invention, a guiding chute extending axially is concavely provided on the outer circumference of the main shaft, and a positioning block corresponding to the guiding chute is convexly provided in the guiding hole.

[0010] In a preferred embodiment of the present invention, the cross-section of the anti-expansion pin is the same as the cross-section of the connector hole.

[0011] In a preferred embodiment of the present invention, jacks corresponding to the press riveting screws one by one are provided on the workpiece.

[0012] In a preferred embodiment of the present invention, when the top of the anti-expansion pin contacts the top of the first avoidance hole, the top of the guiding cone is located in the first avoidance hole. At this time, the distance between the top of the guiding cone and the bottom surface of the push plate is less than the distance between the top of the push plate and the bottom of the upper positioning seat.

[0013] In a preferred embodiment of the present invention, a limit nut is provided on the main shaft above the upper positioning seat, and an upper mounting handle is provided at the top of the main shaft.

[0014] In a preferred embodiment of the present invention, an external thread corresponding to the limit nut is provided on the outer circumference of the main shaft.

[0015] The beneficial effects of the present invention are as follows: A press riveting tool for preventing the deformation of the connector holes on the workpiece is provided in the present invention. The upper die assembly and the lower die assembly are installed on the press riveting machine tool. Before press riveting, the workpiece is first placed on the lower positioning seat, and then the bottom of the press riveting screw is inserted into the jack on the workpiece and extends into the corresponding positioning hole. The upper die assembly is driven by the press riveting machine tool to move downward. The guiding cone at the bottom of the anti-expansion pin first passes through the connector hole on the workpiece and enters the second avoidance hole. Then, the push plate contacts the head of the press riveting screw, and the contraction of the spring avoids the press riveting of the press riveting screw. Before the upper positioning seat contacts the push plate, the anti-expansion pin enters the connector hole to complete the support of the connector hole. Then, the upper positioning seat contacts the push plate and drives the push plate to continue to press down to complete the synchronous press riveting installation of multiple press riveting screws, improving the production efficiency. The anti-expansion pin is used to avoid the deformation of the connector hole and force the material expanded by the press riveting screw on the workpiece to pile into the concave structure of the press riveting screw, improving the firmness and reliability of the press riveting screw. Finally, the upper die assembly moves upward, and the workpiece is separated from the anti-expansion pin under the downward pushing action of the push plate. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0017] Figure 1 is a schematic structural diagram of a preferred embodiment of a riveting screw riveting tool for preventing deformation of the connector hole on a workpiece;

[0018] Figure 2 is Figure 1 exploded view of. Specific embodiments

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0020] Please refer to Figures 1 - 2 , the embodiments of the present invention include:

[0021] As Figure 1 and Figure 2 shown, a riveting screw riveting tool for preventing deformation of the connector hole on a workpiece, used for riveting the riveting screw 9 on the workpiece, and avoiding deformation of the connector hole on the workpiece 5 near the riveting screw 9, includes: an upper die assembly and a lower die assembly. The upper die assembly and the lower die assembly are installed on a riveting machine tool, and the up and down movement of the upper die assembly is performed through the riveting machine tool.

[0022] The upper die assembly includes a main shaft 8, a push plate 2, an anti-expansion pin 3, a spring 7, and an upper positioning seat 4. The push plate 2 is arranged below the upper positioning seat 4 in a relatively liftable manner, and the main shaft 8 extends downward from the upper positioning seat 4 into the push plate 2. As Figure 2 shown, the top surface of the push plate 2 is concavely provided with a guide hole 23 corresponding to the main shaft 8, which is convenient for assembly and is beneficial to the up and down movement of the push plate 2 relative to the main shaft 8.

[0023] As Figure 1 shown, a limit nut 6 is arranged on the main shaft 8 above the upper positioning seat 4 to limit the position height of the upper positioning seat 4 on the main shaft 8. A section of external thread corresponding to the limit nut 6 is arranged on the outer circle of the main shaft 8, which is convenient for adjusting the limit nut 6 to change the relative distance between the upper positioning seat 4 and the push plate 2. An upper mounting handle 81 is arranged at the top of the main shaft 8, and the main shaft 8 is installed on the riveting machine tool through the upper mounting handle 81.

[0024] In this embodiment, on both sides of the outer circumference of the main shaft 8, guiding sliding grooves 82 extending along the axial direction of the main shaft 8 are concavely arranged, and in the guiding holes 23, positioning blocks 21 corresponding to the guiding sliding grooves 82 are convexly arranged to avoid the problem of the torsion of the push plate 2 relative to the main shaft 8.

[0025] On the bottom surface of the push plate 2, a first avoidance hole 22 communicating with the guiding hole 23 and corresponding to the anti-expansion pin 3 is concavely arranged. The anti-expansion pin 3 is arranged at the bottom of the main shaft 8 and located in the first avoidance hole 22. In this embodiment, the anti-expansion pin 3 is connected to the main shaft 8 by a threaded manner, which is convenient for disassembly and replacement.

[0026] As Figure 1 shown, in this embodiment, the cross-section of the anti-expansion pin 3 is the same as that of the connector hole. Therefore, the cross-section of the anti-expansion pin 3 is not limited to Figure 2 the circular structure shown. At the bottom of the anti-expansion pin 3, a guiding cone 31 pointing downward is arranged. The anti-expansion pin 3 enters the connector hole on the workpiece 5 through the guidance of the guiding cone 31 to support the connector hole and avoid the problem of deformation and shrinkage. The guiding cone 31 and the anti-expansion pin 3 can adopt an integrated steel structure, which has high strength.

[0027] The spring 7 is sleeved on the main shaft 8 and located between the push plate 2 and the upper positioning seat 4, and the push plate 2 is elastically supported by the spring 7. As Figure 1 shown, at the bottom of the upper positioning seat 4, a mounting hole 41 corresponding to the spring 7 is concavely arranged, which is beneficial to the hiding of the top of the spring 7, controlling the distance between the push plate 2 and the upper positioning seat 4 and the stroke of the push plate 2.

[0028] In this embodiment, the lower die assembly includes a lower positioning seat 1 and a lower mounting handle 10 located below the lower positioning seat 1. The top of the lower mounting handle 10 is connected to the bottom of the lower positioning seat 1 by a threaded manner, which is convenient for disassembly and assembly. The lower positioning seat 1 is fixed on the riveting machine tool through the lower mounting handle 10 and is located below the upper die assembly.

[0029] On the top surface of the lower positioning seat 1, a second avoidance hole 11 corresponding to the anti-expansion pin 3 and the guiding cone 31 is concavely arranged, which is beneficial for the anti-expansion pin 3 and the guiding cone 31 to enter the second avoidance hole 11 during the riveting process of the riveting screw. In the lower positioning seat 1, positioning holes 12 corresponding to the riveting screws 9 one by one are arranged to guide the downward pressure of the riveting screws 9 and avoid deviation. If there are multiple riveting screws 9 surrounding the connector hole on the workpiece 5, multiple positioning holes 12 are required to position and rivet multiple riveting screws 9 at one time.

[0030] In this embodiment, on the workpiece 5, jacks corresponding to the riveting screws 9 one by one are arranged. Before riveting, the workpiece 5 is first placed on the lower positioning seat 1, and then the bottom of the riveting screw 9 is inserted into the jack on the workpiece 5 and extends into the corresponding positioning hole 12.

[0031] As Figure 1As shown in the figure, before press riveting, when the top of the anti-expansion pin 3 contacts the top of the first avoidance hole 22, the top of the guiding cone 31 is located in the first avoidance hole 22. At this time, the distance between the top of the guiding cone 31 and the bottom surface of the push plate 2 is less than the distance between the top of the push plate 2 and the bottom of the upper positioning seat 4, ensuring that before the push plate 2 contacts the upper positioning seat 4 during the press riveting process, the bottom of the anti-expansion pin 3 enters the connector hole on the workpiece 5, and then the push plate 2 contacts the upper positioning seat 4. The push plate 2 continues to press down under the action of the upper positioning seat 4 to complete the press riveting of the press riveting screw, and the connector hole is supported by the anti-expansion pin 3 to avoid the problem of deformation and shrinkage of the connector hole, and force the material on the workpiece that is expanded by the press riveting screw to pile into the concave structure of the press riveting screw, improving the firmness and reliability of the press riveting screw.

[0032] In summary, a press riveting tooling for a press riveting screw to prevent deformation of the connector hole on a workpiece pointed out by the present invention can perform synchronous press riveting of multiple press riveting screws around the connector hole on the workpiece, avoid the deformation problem of the connector hole, and improve the efficiency and installation reliability of press riveting screw press riveting production.

[0033] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A riveting tool for a riveting screw to prevent deformation of the connector hole on a workpiece, which is used for riveting the riveting screw on the workpiece and avoids deformation of the connector hole on the workpiece near the riveting screw. It is characterized in that, Comprising: An upper die assembly and a lower die assembly. The upper die assembly includes a main shaft, a push plate, an anti-expansion pin, a spring, and an upper positioning seat. The push plate is disposed below the upper positioning seat in a relatively liftable manner. The main shaft extends downward from the upper positioning seat through to the push plate. A guide hole corresponding to the main shaft is concavely provided on the top surface of the push plate. A first avoidance hole communicating with the guide hole and corresponding to the anti-expansion pin is concavely provided on the bottom surface of the push plate. The anti-expansion pin is provided at the bottom of the main shaft and is located in the first avoidance hole. A guide cone pointing downward is provided at the bottom of the anti-expansion pin. The spring is sleeved on the main shaft and is located between the push plate and the upper positioning seat. The lower die assembly includes a lower positioning seat. A second avoidance hole corresponding to the anti-expansion pin and the guide cone is concavely provided on the top surface of the lower positioning seat. Positioning holes corresponding to the riveting screws one by one are provided in the lower positioning seat. When the top of the anti-expansion pin contacts the top of the first avoidance hole, the top of the guide cone is located in the first avoidance hole. At this time, the distance between the top of the guide cone and the bottom surface of the push plate is less than the distance between the top of the push plate and the bottom of the upper positioning seat. A guide chute extending axially is concavely provided on the outer circumference of the main shaft. A positioning block corresponding to the guide chute is convexly provided in the guide hole. Jacks corresponding to the riveting screws one by one are provided on the workpiece.

2. The riveting tool for a riveting screw to prevent deformation of the connector hole on a workpiece according to claim 1, characterized in that, The lower die assembly further includes a lower mounting handle located below the lower positioning seat.

3. The riveting tool for a riveting screw to prevent deformation of the connector hole on a workpiece according to claim 2, characterized in that, The top of the lower mounting handle is connected to the bottom of the lower positioning seat by a threaded connection.

4. The riveting tool for a riveting screw to prevent deformation of the connector hole on a workpiece according to claim 1, characterized in that, A mounting hole corresponding to the spring is concavely provided at the bottom of the upper positioning seat.

5. The riveting tool for a riveting screw to prevent deformation of the connector hole on a workpiece according to claim 1, characterized in that, The cross-section of the anti-expansion pin is the same as the cross-section of the connector hole.

6. The riveting tool for a riveting screw to prevent deformation of the connector hole on a workpiece according to claim 1, characterized in that, A limit nut is provided on the main shaft above the upper positioning seat, and an upper mounting handle is provided at the top of the main shaft.

7. The riveting tool for a riveting screw to prevent deformation of the connector hole on a workpiece according to claim 1, characterized in that, An external thread corresponding to the limit nut is provided on the outer circumference of the main shaft.

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