Stainless steel composite reaming self-drilling screw

Abstract

The utility model discloses a stainless steel composite reaming self-drilling screw which comprises a stainless steel screw head, a stainless steel rod body, an alloy steel drill tail and a waterproof gasket. The stainless steel screw head is fixedly connected with the stainless steel rod body; threads are arranged on the surface of the stainless steel rod body; an alloy steel drill tail is arranged at the drill tail end of the stainless steel rod body; and the waterproof gasket sleeves the stainless steel rod body and is positioned at the bottom of the stainless steel screw head. The screw is good in corrosion resistance and weather resistance, good in tensile strength and high in ductility.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, and more specifically to a stainless steel composite reaming drill screw. Background Technology

[0002] With the continuous development of building materials, new building materials such as resin tiles and PVC tiles are widely used in steel structure roofing and other construction fields due to their advantages such as lightweight, corrosion resistance, and rich colors. However, these materials exhibit significant thermal expansion and contraction during use and are often placed in environments with corrosive sources, which places higher demands on the performance of the connecting screws.

[0003] Ordinary carbon steel screws are prone to rusting in environments with corrosive sources, which greatly shortens their service life and makes them unsuitable for long-term use. Furthermore, due to the material properties of carbon steel screws, their tensile strength is limited. Under the thermal expansion and contraction of materials such as resin tiles, the screws are easily broken and cannot effectively fix the components.

[0004] Therefore, developing a stainless steel composite reaming drill screw with good corrosion resistance, high tensile strength, and high ductility is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a stainless steel composite reaming drill screw with good corrosion resistance, high tensile strength and high ductility.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Stainless steel composite reaming self-drilling screws, including:

[0008] Stainless steel screw heads

[0009] A stainless steel rod body, with a stainless steel screw head fixedly connected to the stainless steel rod body; the surface of the stainless steel rod body is provided with threads; the drill tail end of the stainless steel rod body is provided with an alloy steel drill tail.

[0010] A waterproof washer is fitted onto the stainless steel rod and located at the bottom of the stainless steel screw head.

[0011] The beneficial effects of adopting the above technical solution are as follows: The combination of stainless steel screw head, stainless steel shank, and alloy steel drill bit provides excellent corrosion resistance, effectively resisting corrosion and extending the screw's service life. The screw has high tensile strength, capable of withstanding significant tensile forces, preventing breakage due to external forces during use and ensuring connection reliability. Furthermore, the screw possesses a certain degree of ductility, adapting to thermal expansion and contraction to some extent, reducing the risk of loosening or damage due to temperature changes. The waterproof washer effectively prevents rainwater leakage, protecting the connection from moisture erosion and further improving the screw's service life and connection stability.

[0012] Preferably, the top of the waterproof gasket is provided with an annular groove, and a baffle is fitted inside the annular groove. The baffle fitted inside the annular groove at the top of the waterproof gasket can increase the sealing between the waterproof gasket and the connecting component, prevent rainwater from seeping in from gaps, and further improve the waterproof effect.

[0013] Preferably, the top surfaces of the waterproof gasket and the baffle are inclined downwards. This downward-inclined design allows rainwater to slide quickly off the gasket surface, reducing the time rainwater remains on the gasket surface and further reducing the risk of rainwater leakage.

[0014] Preferably, the top of the stainless steel rod is provided with a reaming tool. The reaming tool can enlarge the holes in the connection parts (components, resin tiles, etc.) during installation, providing more suitable space for component installation and reserving space to cope with thermal expansion and contraction.

[0015] Preferably, the alloy steel drill bit is a dovetail type. The dovetail type drill bit is heat-treated and hardened, possessing high strength and wear resistance, and can better meet the drilling needs of materials such as iron plates.

[0016] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a stainless steel composite reaming self-drilling screw, the beneficial effects of which are:

[0017] (1) By adopting a combination of stainless steel screw head, stainless steel shank, alloy steel drill tail, and waterproof washer design, the corrosion resistance of the screw is significantly improved, enabling it to be used stably for a long time in environments with corrosive sources, thus extending the service life of the screw.

[0018] (2) The stainless steel rod body, alloy steel drill tail and stainless steel screw head are welded into one piece, which has strong tensile strength, strong rust resistance and can effectively adapt to the thermal expansion and contraction of materials. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 The attached figure is a schematic diagram of the screw structure provided by this utility model;

[0021] Figure 2 The attached figure is a top view of the screw provided by this utility model;

[0022] Figure 3 The attached figure shows the invention provided by this utility model. Figure 2 Sectional view at point AA.

[0023] In the figure,

[0024] 1- Stainless steel screw head;

[0025] 2- Stainless steel rod body;

[0026] 21 - Thread; 22 - Reamer;

[0027] 3-Washer;

[0028] 31- Annular groove;

[0029] 4-Baffle plate; 5-Alloy steel drill tail. Detailed Implementation

[0030] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] This utility model embodiment discloses a stainless steel composite reaming drill screw, comprising:

[0032] Stainless steel screw head 1,

[0033] Stainless steel rod body 2, stainless steel screw head 1 is fixedly connected to stainless steel rod body 2; thread 21 is provided on the surface of stainless steel rod body 2; alloy steel drill tail 5 is provided at the drill tail end of stainless steel rod body 2.

[0034] Waterproof washer 3 is fitted onto stainless steel rod 2 and located at the bottom of stainless steel screw head 1.

[0035] like Figure 1 As shown, part L consists of a stainless steel screw head 1 and a stainless steel rod 2, both made of stainless steel. Part S consists of an alloy steel drill tail 5, made of alloy steel.

[0036] To further optimize the above technical solution, the stainless steel screw head 1 and the stainless steel rod body 2 are made of austenitic stainless steel 304 / 316, which has good corrosion and rust resistance, high tensile strength, and strong ductility, and is suitable for various environments with corrosive sources.

[0037] To further optimize the above technical solution, the stainless steel screw head 1 is made of austenitic stainless steel, which has strong rust resistance; the alloy steel drill tail 5 is locally heat-treated to increase its strength, and the alloy steel drill tail 5 is a dovetail type, which makes it easier and less time-consuming to tap iron plates; the stainless steel screw head 1, stainless steel rod 2, and alloy steel drill tail 5 are welded into one piece, which makes it stronger in terms of pulling force and better in terms of rust resistance when tapping iron plates. At the same time, it has a hole enlarging tool 22, which can enlarge the hole, making screw installation more convenient and providing extra space for adjustment.

[0038] To further optimize the above technical solution, an annular groove 31 is provided on the top of the waterproof gasket 3, and a baffle 4 is fitted inside the annular groove 31. The diameters of the waterproof gasket 3 and the baffle 4 are significantly larger than the diameter of the stainless steel rod 2, and the waterproof gasket 3 fits tightly with the connected components (such as steel structure roofs or resin tiles) to prevent rainwater leakage and effectively avoid corrosion of the components. This can extend the life of the building.

[0039] To further optimize the above technical solution, the top surfaces of the waterproof gasket 3 and the baffle 4 are inclined downwards. The inclined design facilitates rainwater falling.

[0040] To further optimize the above technical solution, a reaming knife 22 is provided at the top of the stainless steel rod 2.

[0041] To further optimize the above technical solution, the alloy steel drill bit 5 is a dovetail type. The alloy steel drill bit 5 undergoes heat treatment hardening to enhance its strength.

[0042] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stainless steel composite reaming self-drilling screw, characterized in that, include: Stainless steel screw heads A stainless steel rod body, with a stainless steel screw head fixedly connected to the stainless steel rod body; the surface of the stainless steel rod body is provided with threads; the drill tail end of the stainless steel rod body is provided with an alloy steel drill tail. A waterproof washer is fitted onto the stainless steel rod and located at the bottom of the stainless steel screw head.

2. The stainless steel composite reaming self-drilling screw according to claim 1, characterized in that, The top of the waterproof gasket is provided with an annular groove, and a baffle is fitted inside the annular groove.

3. The stainless steel composite reaming self-drilling screw according to claim 2, characterized in that, The top surfaces of the waterproof gasket and the baffle are inclined downwards.

4. The stainless steel composite reaming self-drilling screw according to claim 1, characterized in that, A reaming tool is provided at the top of the stainless steel rod.

5. The stainless steel composite reaming self-drilling screw according to claim 1, characterized in that, The alloy steel drill bit is a dovetail type.

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