Special rivet body for hippocampus rivet

Abstract

The utility model discloses a special rivet body for a hippocampus rivet, which comprises a rivet body, a rivet core hole is arranged in the rivet body, a rivet core straight tooth fixing hole is arranged at the front end of the rivet core hole, the rivet core straight tooth fixing hole extends to the end part of a flange, and the aperture and the length of the rivet core straight tooth fixing hole are determined according to the diameters and the lengths of rod parts of rivet bodies made of different materials. An upper punched hole is formed in the end of the flange, a fillet is arranged at the transition position of the upper punched hole and the end of the flange, and a pipe opening of the rivet core hole is a plain end face. According to the utility model, the abnormities of springback, loosening and abnormal sound of the head of the rivet core, cracking of a pipe orifice, infirm fixation of a cup riveting workpiece and the like after riveting are avoided, and meanwhile, the rejection rate of products and the production cost are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to a special nail body for seahorse rivets. Background Technology

[0002] Conventional seahorse rivet bodies have the following defects: the core hole runs through the entire body, extending from the front end to the flange end and from the rear end to the end of the body. Therefore, after riveting, it affects the locking of the core head, causing loosening and rotation. In order to cold-forge through and remove waste material without producing burrs, the upper punch hole is usually set as a stepped hole with a large and deep diameter, resulting in a short core hole length. After riveting, this part rubs against the straight teeth of the core and is fixed at a short distance, affecting the holding force of the rivet head. The opening of the core hole is an inward bevel. After riveting, the head of the core can easily drill into the opening, causing riveting abnormalities and affecting the mechanical strength of the product and the locking ability of the workpiece. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the existing technology and provide a special nail body for seahorse rivets, which can avoid abnormalities such as the rebound of the nail core and nail head after riveting, loosening and abnormal noise, cracking of the tube opening, and insecure fixing of the riveted workpiece, while greatly reducing the product scrap rate and production cost.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a special nail body for seahorse rivets, including a nail body body, a nail core hole is opened in the nail body body, a nail core straight tooth fixing hole is provided at the front end of the nail core hole, the nail core straight tooth fixing hole extends to the flange end, an upper punch hole is provided at the flange end, a rounded corner is provided at the transition between the upper punch hole and the flange end, and the pipe opening of the nail core hole is a flat end face.

[0005] Furthermore, the diameter of the straight tooth fixing hole in the nail core is smaller than the diameter of the nail core hole.

[0006] Specifically, the diameter of the nail body shank / diameter of the straight tooth fixing hole of the nail core made of aluminum alloy, carbon steel, and stainless steel are φ4.8mm / φ3.4mm; φ6.4mm / φ4.6mm; and φ7.8mm / φ5.6mm, respectively.

[0007] Furthermore, the length of the straight tooth fixing hole in the nail core is determined based on the diameter and length of the nail body.

[0008] Specifically, when the diameter of the nail body shank is 4.8 mm and the shank length is 9.0–11.5 mm, the length of the straight tooth fixing hole in the nail core is 0.9–1.4 mm;

[0009] When the diameter of the nail body shank is 4.8 mm and the shank length is 13.0 mm or more, the length of the straight tooth fixing hole in the nail core is 1.7 to 2.1 mm.

[0010] When the diameter of the nail body shank is 6.4 mm and the shank length is 9.0–12.5 mm, the length of the straight tooth fixing hole in the nail core is 1.1–1.5 mm.

[0011] When the diameter of the nail body shank is 6.4 mm and the shank length is 14.0 mm or more, the length of the straight tooth fixing hole in the nail core is 2.5 to 2.7 mm.

[0012] When the diameter of the nail body shank is 7.8 mm and the shank length is 13.5–16.5 mm, the length of the straight tooth fixing hole in the nail core is 2.9–3.3 mm.

[0013] When the diameter of the nail body shank is 7.8 mm and the shank length is 19.0 mm or more, the length of the straight tooth fixing hole in the nail core is 5.3 to 5.7 mm.

[0014] Furthermore, the fillet radius at the transition between the upper punch and the flange is set to 0.25–0.5 mm.

[0015] The beneficial effects of this utility model's special rivet body for seahorses are:

[0016] 1. Add a straight tooth fixing hole to the front end of the nail core hole, which matches the diameter of the straight tooth at the root of the nail core. After riveting, the diameter of the straight tooth at the root of the nail core will rub against the small hole, resulting in a stronger lock.

[0017] 2. The radius of the rounded corner of the punched hole is designed to be 0.25-0.5mm. The purpose is to make the burrs at the hole opening turn out after the inner hole is punched through and then squeezed back out. This can effectively lengthen the small hole, and the contact surface of the vertical teeth of the nail core is large, making it more secure to contact the diameter of the straight teeth at the root of the nail core neck. After the customer installs the nail, the nail head is not easy to loosen or fall off.

[0018] 3. The tube opening of the rivet core hole is designed to be flat, ensuring that the rivet core head is not easy to drill into the tube opening after mass riveting, so that the stacking drum is even and sufficient, and fits tightly against the riveted parts to achieve the best riveting effect. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] In the diagram: 1. Nail body, 2. Nail core hole, 3. Nail core straight tooth fixing hole, 4. Top punch hole, 5. Flange. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0023] As shown in the figure, the special nail body for the seahorse rivet includes a nail body 1, a nail core hole 2 is opened in the nail body 1, a nail core straight tooth fixing hole 3 is provided at the front end of the nail core hole 2, the nail core straight tooth fixing hole 3 extends to the end of the flange 5, an upper punch hole 4 is provided at the end of the flange 5, a rounded corner is provided at the transition between the upper punch hole 4 and the end of the flange 5, and the opening of the nail core hole 2 is a flat end face.

[0024] The diameter of the straight tooth fixing hole 3 is smaller than the diameter of the nail core hole 2. The diameter of the nail body shank / the diameter of the straight tooth fixing hole for aluminum alloy, carbon steel, and stainless steel are respectively: φ4.8mm / φ3.4mm; φ6.4mm / φ4.6mm; φ7.8mm / φ5.6mm.

[0025] The length of the straight tooth fixing hole 3 in the nail core is determined based on the diameter and length of the nail body. During implementation, the specific dimensions are set as follows:

[0026] When the diameter of the nail body shank is 4.8 mm and the shank length is 9.0–11.5 mm, the length of the straight tooth fixing hole in the nail core is 0.9–1.4 mm.

[0027] When the diameter of the nail body shank is 4.8 mm and the shank length is 13.0 mm or more, the length of the straight tooth fixing hole in the nail core is 1.7 to 2.1 mm.

[0028] When the diameter of the nail body shank is 6.4 mm and the shank length is 9.0–12.5 mm, the length of the straight tooth fixing hole in the nail core is 1.1–1.5 mm.

[0029] When the diameter of the nail body shank is 6.4 mm and the shank length is 14.0 mm or more, the length of the straight tooth fixing hole in the nail core is 2.5 to 2.7 mm.

[0030] When the diameter of the nail body shank is 7.8 mm and the shank length is 13.5–16.5 mm, the length of the straight tooth fixing hole in the nail core is 2.9–3.3 mm.

[0031] When the diameter of the nail body shank is 7.8 mm and the shank length is 19.0 mm or more, the length of the straight tooth fixing hole in the nail core is 5.3 to 5.7 mm.

[0032] The fillet radius at the transition between the upper punch 4 and the flange 5 is set to 0.25-0.5mm.

[0033] The special nail body for seahorse rivets of this utility model avoids abnormalities such as nail core and nail head rebound, loosening and abnormal noise, pipe opening cracking, and cup riveting of workpieces not being firmly fixed after riveting, while greatly reducing product scrap rate and production cost.

[0034] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A special nail body for seahorse rivets, characterized in that: The device includes a nail body (1), a nail core hole (2) is provided in the nail body (1), a nail core straight tooth fixing hole (3) is provided at the front end of the nail core hole (2), the nail core straight tooth fixing hole (3) extends to the end of the flange (5), an upper punch hole (4) is provided at the end of the flange (5), a rounded corner is provided at the transition between the upper punch hole (4) and the end of the flange (5), and the pipe opening of the nail core hole (2) is a flat end face.

2. The special nail body for a seahorse rivet according to claim 1, characterized in that: The diameter of the straight tooth fixing hole (3) of the nail core is smaller than the diameter of the nail core hole (2).

3. The special nail body for a seahorse rivet according to claim 2, characterized in that: The diameter of the nail body shank / diameter of the straight tooth fixing hole in the nail core made of aluminum alloy, carbon steel, and stainless steel are φ4.8mm / φ3.4mm; φ6.4mm / φ4.6mm; and φ7.8mm / φ5.6mm, respectively.

4. The special nail body for a seahorse rivet according to claim 1, characterized in that: The length of the straight tooth fixing hole (3) of the nail core is determined based on the diameter and length of the nail body rod.

5. The special nail body for a seahorse rivet according to claim 4, characterized in that: When the diameter of the nail body shank is 4.8 mm and the shank length is 9.0–11.5 mm, the length of the straight tooth fixing hole in the nail core is 0.9–1.4 mm. When the diameter of the nail body shank is 4.8 mm and the shank length is 13.0 mm or more, the length of the straight tooth fixing hole in the nail core is 1.7 to 2.1 mm. When the diameter of the nail body shank is 6.4 mm and the shank length is 9.0–12.5 mm, the length of the straight tooth fixing hole in the nail core is 1.1–1.5 mm. When the diameter of the nail body shank is 6.4 mm and the shank length is 14.0 mm or more, the length of the straight tooth fixing hole in the nail core is 2.5 to 2.7 mm. When the diameter of the nail body shank is 7.8 mm and the shank length is 13.5–16.5 mm, the length of the straight tooth fixing hole in the nail core is 2.9–3.3 mm. When the diameter of the nail body shank is 7.8 mm and the shank length is 19.0 mm or more, the length of the straight tooth fixing hole in the nail core is 5.3 to 5.7 mm.

6. The special nail body for a seahorse rivet according to claim 1, characterized in that: The fillet radius at the transition between the upper punch (4) and the flange (5) is set to 0.25-0.5 mm.

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