A pre-holeless fastening rivet

Abstract

The utility model discloses a kind of pre-holeless fastening rivets, belong to metal fastener technical field, comprising: disc head;The disc head is integrally formed with middle column, circular table body and conical head in sequence;The middle column is located between disc head and circular table body, and the diameter of middle column is less than the diameter of disc head, the diameter of circular table body gradually increases from small end to large end, and small end is connected with middle column, and its large end is connected with conical head, the conical head is integrally formed with circular table body large end, and outer diameter gradually reduces from connecting end to free end, annular groove is formed between circular table body and middle column, for receiving extruded and transferred matrix material in riveting process, the utility model wider application range, and compared with traditional rivet and its riveting method, rivet can be directly pressed into metal matrix by the utility model during construction, the material of metal matrix is quickly and directly, extruded into annular groove and form mechanical locking, and suitable fastening strength is improved, and operation steps are simplified.

Description

Technical Field

[0001] This utility model relates to the field of metal fastener technology, specifically to a pre-drilled fastening rivet. Background Technology

[0002] Traditional metal rivets are permanent mechanical fasteners made of metal. Their core function is to connect two or more workpieces together by undergoing plastic deformation (i.e., irreversible deformation). In use, it is usually necessary to pre-drill holes in the metal base to be fastened, and then insert the rivet through the nameplate or other parts with its own hole, and then insert it into the base hole for riveting. Traditional rivets require drilling holes in the metal substrate before installation, which increases the construction process and reliance on tools, making installation time-consuming. Furthermore, when the diameter of the hole drilled in the metal substrate does not match the size of the rivet, it can easily lead to loosening of the fastener or an unstable connection.

[0003] Based on this, the present invention designs a pre-drilled fastening rivet to solve the above problems. Summary of the Invention

[0004] The purpose of this utility model is to provide a pre-drilled fastening rivet to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pre-drilled fastening rivet, comprising: a pan head; the pan head is integrally formed with a central column, a frustum, and a conical head in sequence; The central column is located between the pan head and the frustum, and the diameter of the central column is smaller than that of the pan head. The diameter of the frustum gradually increases from the small end to the large end, and the small end is connected to the central column. Its large end is connected to the conical head. The conical head and the large end of the frustum are integrally formed, and the outer diameter gradually decreases from the connecting end to the free end. An annular groove is formed between the frustum and the central column to receive the base material that is squeezed and transferred during the nailing process.

[0006] Preferably, the pan head has a disc-shaped structure, and the bottom surface of the pan head is used to adhere to the surface of the attached part.

[0007] Preferably, the central column is a cylinder with a diameter less than 0.5 to 0.8 times the diameter of the disc head.

[0008] Preferably, the depth of the annular groove between the frustum and the central column is 0.1 to 0.3 times the diameter of the central column, which is used to provide locking space.

[0009] Preferably, the taper angle of the frustum is 10° to 25° to facilitate the plastic deformation of the metal matrix.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: Compared with traditional rivets and their installation methods, this utility model allows rivets to be directly pressed into the metal substrate during construction. The material of the metal substrate is quickly and directly squeezed into the annular groove to form a mechanical lock, and the fastening strength is improved while the operation steps are simplified. It is applicable to a wide range of metal substrates, including steel, stainless steel, cast iron, copper alloys, and aluminum, and is suitable for the installation and use of various parts such as nameplates. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 To highlight the overall structure of the pre-drilled fastening rivet; Figure 2 This is a schematic diagram illustrating the structure before the rivets are connected to the attached parts and the metal substrate. Figure 3 This is a schematic diagram illustrating the structure when the conical head connects to the metal substrate; Figure 4 This diagram illustrates how the rivet pushes into the substrate to create a recess and secures the attached part.

[0013] The labels represent: 1. Pan head; 2. Central column; 3. Frustum; 4. Conical head. Detailed Implementation

[0014] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0015] Example 1: Structure of a pre-drilled fastening rivet: like Figure 1 As shown, the pre-drilled fastening rivet of this utility model includes a pan head 1, a central column 2, a frustum 3, a conical head 4, and an annular groove.

[0016] The disc head 1 has a disc-shaped structure, and its bottom surface is used to adhere to the surface of the attached part 6 to distribute pressure and make the part evenly stressed. The central column 2 is a cylinder with a diameter of 0.5 to 0.8 times that of the pan head 1, ensuring that the rivet has sufficient strength in the hole, while leaving space for the flow of material in the annular groove and the metal substrate 5; The annular groove 5 formed between the frustum 3 and the central column 2 has a depth of 0.1 to 0.3 times the diameter of the central column 2. The depth of the annular groove can accommodate a sufficient metal substrate 5 while maintaining the strength of the rivet itself. The cone angle of the frustum 3 is 10° to 25°, which is used to guide the plastic flow of the base metal. The range setting ensures smooth extrusion molding. The conical head 4 is responsible for opening and extrusion, acting directly on the metal substrate 5 to cause plastic deformation and flow of the substrate metal. The matching frustum 3 gradually expands, further extending the plastic zone and providing direction for the flow of substrate material. The annular groove provides a space for material flow and locking, achieving mechanical embedding. The pan head 1 provides surface support for pressing the attached parts 6, providing stable mechanical locking and improving connection strength. Together, they achieve pre-drilling-free installation and simplify the process.

[0017] Example 2, nailing method and usage steps: like Figure 2-4 The steps are as follows: Material selection: Select nameplates, wire clips or lightweight parts as the attachment parts, and the attachment parts shall have through holes for installation. Select steel, stainless steel, cast iron, brass, bronze or aluminum as the metal base.

[0018] Positioning: The nameplate is attached to the surface of the metal substrate as an attachment part; the nameplate has pre-drilled mounting holes. The operator inserts the central column 2 and the frustum 3, which are fastening rivets without pre-drilled holes, into the holes of the nameplate, keeping the conical head 4 of the rivet facing the surface of the metal substrate.

[0019] Advancement: Using a handheld pressure tool (such as hydraulic pliers or a rivet gun), apply pressure axially to push the rivet forward. As the conical head contacts the surface of the metal substrate, the metal substrate material undergoes plastic flow and sinks under the extrusion pressure, gradually forming an annular depression.

[0020] Fixing: Continue applying pressure until the metal matrix material is forced into the annular groove between the rivet frustum 3 and the central post 2. Due to the limited space in the groove, the metal matrix material is simultaneously compressed radially and axially, eventually becoming firmly embedded in the groove, forming a stable mechanical lock.

[0021] After completing the above steps, release the pressure tool. At this point, the nameplate and metal substrate are permanently fixed together using pre-drilled rivets. No additional welding or threading is required at the connection points, making installation quick and reliable.

[0022] It should be understood in the description of this utility model that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium. They may refer to the internal connection of two elements or the interaction between two elements. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pre-drilled fastening rivet, characterized in that, include: Pan head (1); The pan head (1) is integrally formed with a central column (2), a frustum (3) and a conical head (4); The central column (2) is located between the pan head (1) and the frustum (3), and the diameter of the central column (2) is smaller than the diameter of the pan head (1). The diameter of the frustum (3) gradually increases from the small end to the large end, and the small end is connected to the central column (2). Its large end is connected to the conical head (4). The conical head (4) and the large end of the frustum (3) are integrally formed, and the outer diameter gradually decreases from the connecting end to the free end. An annular groove is formed between the frustum (3) and the central column (2) to receive the base material that is squeezed and transferred during the nailing process.

2. The pre-drilled fastening rivet according to claim 1, characterized in that: The pan head (1) has a disc-shaped structure, and the bottom surface of the pan head (1) is used to adhere to the surface of the attached part (6).

3. The pre-drilled fastening rivet according to claim 1, characterized in that: The central column (2) is a cylinder, and its diameter is 0.5 to 0.8 times smaller than the diameter of the disc head (1).

4. The pre-drilled fastening rivet according to claim 1, characterized in that: The depth of the annular groove between the frustum (3) and the central column (2) is 0.1 to 0.3 times the diameter of the central column (2), which is used to provide locking space.

5. A pre-drilled fastening rivet according to claim 1, characterized in that: The cone angle of the frustum (3) is 10° to 25° to facilitate the plastic deformation of the metal substrate (5).

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