Hexagon head socket cap screw with lightning tail

Abstract

The utility model discloses a hexagonal head drill tail screw with lightning tail, including one end is provided with hexagonal head, the other end is provided with the screw body of drill tail, be equipped with main cutting edge, first vice cutting edge and second vice cutting edge on the drill tail, second vice cutting edge is established between main cutting edge and first vice cutting edge, the included angle a between main cutting edge and first vice cutting edge, a > 90 DEG, the included angle b between first vice cutting edge and second vice cutting edge, b < 15 DEG, be equipped with horizontal edge between first vice cutting edge and main cutting edge. The drill tail screw has the characteristics that the cutting resistance is small, the drilling efficiency is high, the overall function is perfect, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and more specifically, it relates to a hexagonal washer head drill screw with lightning bolt tail. Background Technology

[0002] Self-drilling screws, as fasteners combining self-drilling, self-tapping, and self-tightening functions, are widely used in construction, machinery manufacturing, and home appliance installation. The rationality of their drill tail structure directly determines installation efficiency, connection stability, and applicability. Existing self-drilling screws often employ a single main cutting edge or a combination of a main cutting edge and a single secondary cutting edge. When dealing with connected parts of varying thicknesses and hardness, such as steel plates and profiles, they generally suffer from high penetration resistance and insufficient initial positioning accuracy. Especially in scenarios requiring rapid assembly, the concentrated force when the cutting edge contacts the connected part can easily cause drill tail offset, affecting installation accuracy. Furthermore, the included angle design of traditional cutting edges is mostly 90° or less, which can easily lead to chip entanglement and poor chip removal during chip formation. This not only increases cutting resistance and reduces drilling efficiency but may also cause loosening of the screw after tightening due to chip residue, affecting connection reliability and resulting in poor overall performance. Therefore, this utility model proposes a hexagonal washer head self-drilling screw with a lightning bolt tail. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a hexagonal washer head self-drilling screw with a lightning bolt tail, which has the characteristics of low cutting resistance and high drilling efficiency.

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows: The utility model relates to a hexagonal washer head drill tail screw with lightning bolt tail, comprising a screw body with a hexagonal washer head at one end and a drill tail at the other end. The drill tail is provided with a main cutting edge, a first secondary cutting edge and a second secondary cutting edge. The second secondary cutting edge is located between the main cutting edge and the first secondary cutting edge. The included angle α between the main cutting edge and the first secondary cutting edge is 90°, and the included angle b between the first secondary cutting edge and the second secondary cutting edge is 15°.

[0005] The present invention is further configured such that a transverse cutting edge is provided between the first secondary cutting edge and the main cutting edge.

[0006] The present invention is further configured such that the included angle α between the main cutting edge and the first secondary cutting edge is 120°±10°.

[0007] The present invention is further configured such that the included angle b between the first set of cutting edges and the second set of cutting edges is 8°±5°.

[0008] The present invention is further configured such that the main cutting edge, the first secondary cutting edge, and the second secondary cutting edge are all integrally integrated with the screw body.

[0009] In summary, this utility model has the following beneficial effects: 1. By forming a "lightning groove" structure with the main cutting edge, the first secondary cutting edge, the second secondary cutting edge and a specific included angle, combined with an integrated molding design, it can significantly reduce the drill tee penetration resistance and improve positioning accuracy, optimize chip removal and avoid entanglement residue, and eliminate the risk of cutting edge falling off, thereby improving drilling efficiency and connection stability as a whole.

[0010] 2. This structure and parameter optimization allows the screw to meet the rapid assembly needs of conventional scenarios such as construction and home appliance installation, as well as scenarios with high requirements for precision and reliability, such as mechanical manufacturing, making it more versatile. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 yes Figure 1 Enlarged structural diagram of section A in the middle. Detailed Implementation

[0012] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the patent claims of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0013] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0014] Example 1 See Figure 1 and Figure 2 As shown in the figure, the hexagonal washer head drill tail screw with lightning bolt tail involved in this embodiment includes a screw body 100 with a hexagonal washer head at one end and a drill tail 1 at the other end. The drill tail 1 is provided with a main cutting edge 2, a first secondary cutting edge 3 and a second secondary cutting edge 4. The second secondary cutting edge 4 is located between the main cutting edge 2 and the first secondary cutting edge 3. The included angle α between the main cutting edge 2 and the first secondary cutting edge 3 is 120°, and the included angle b between the first secondary cutting edge 3 and the second secondary cutting edge 4 is 8°.

[0015] Furthermore, a transverse cutting edge 5 is provided between the first secondary cutting edge 3 and the main cutting edge 2.

[0016] Furthermore, the main cutting edge 2, the first secondary cutting edge 3, and the second secondary cutting edge 4 are all integrated with the screw body.

[0017] In this embodiment, the hexagonal washer head self-drilling screw with lightning bolt tail has a hexagonal washer head at one end and a drill tail at the other end. The drill tail has an integrally formed main cutting edge, a first secondary cutting edge, and a second secondary cutting edge, with the second secondary cutting edge located between the main cutting edge and the first secondary cutting edge. A chisel edge is machined between the first secondary cutting edge and the main cutting edge. Specifically, the angle between the main cutting edge and the first secondary cutting edge is set to 120°, and the angle between the first secondary cutting edge and the second secondary cutting edge is set to 8°, allowing the multiple cutting edges to naturally form a lightning bolt groove structure at the drill tail. During use, force is applied through the hexagonal washer head, and the drill tail can complete self-drilling and fastening with the help of the synergistic action of the multiple cutting edges.

[0018] The hexagonal washer head drill screw with lightning bolt tail involved in this utility model forms a "lightning bolt groove" structure by means of the main cutting edge, the first secondary cutting edge, the second secondary cutting edge and a specific included angle. Combined with the one-piece molding design, it not only greatly reduces the drill tip penetration resistance and improves positioning accuracy, but also optimizes chip removal and avoids entanglement residue, while eliminating the risk of cutting edge detachment, thus improving drilling efficiency and connection stability overall. Furthermore, the optimized structure and parameters allow the screw to meet the rapid assembly needs of conventional scenarios such as construction and home appliance installation, as well as scenarios with high precision and reliability requirements such as mechanical manufacturing, making it more versatile, functionally complete and highly practical.

[0019] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the actual orientation or positional relationship shown. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the embodiments and according to the specific circumstances.

[0020] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A hexagonal washer head self-drilling screw with a lightning bolt tail, comprising a screw body having a hexagonal washer head at one end and a drill tail at the other end, characterized in that: The drill shank is provided with a main cutting edge, a first secondary chip cutting edge, and a second secondary chip cutting edge. The second secondary chip cutting edge is located between the main cutting edge and the first secondary chip cutting edge. The included angle between the main cutting edge and the first secondary chip cutting edge is α, where α > 90°, and the included angle between the first secondary chip cutting edge and the second secondary chip cutting edge is β, where β < 15°.

2. The hexagonal washer head drill screw with lightning bolt tail according to claim 1, characterized in that: A transverse cutting edge is provided between the first secondary cutting edge and the main cutting edge.

3. The hexagonal washer head drill screw with lightning bolt tail according to claim 1 or 2, characterized in that: The included angle α between the main cutting edge and the first secondary cutting edge is 120°±10°.

4. The hexagonal washer head drill screw with lightning bolt tail according to claim 3, characterized in that: The included angle b between the first and second cutting edges is 8°±5°.

5. The hexagonal washer head drill screw with lightning bolt tail according to claim 1, characterized in that: The main cutting edge, the first secondary cutting edge, and the second secondary cutting edge are all integrated with the screw body.

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