CN219035255U

CN219035255U - Self-tapping screw

Info

Publication number: CN219035255U
Application number: CN202223070808.6U
Authority: CN
Inventors: 陈梦娟; 胡志丰; 胡旭品
Original assignee: Suzhou Taili Precision Fastener Co ltd
Current assignee: Suzhou Taili Precision Fastener Co ltd
Priority date: 2022-11-18
Filing date: 2022-11-18
Publication date: 2023-05-16
Anticipated expiration: 2032-11-18

Abstract

The utility model discloses a self-tapping screw, which comprises a screw body, wherein the screw body comprises acrylic enamel, the top of the acrylic enamel is fixedly connected with a precipitation hardening stainless steel layer, the top of the precipitation hardening stainless steel layer is fixedly connected with an alloy cutting tool steel layer, the top of the alloy cutting tool steel layer is coated with a polytetrafluoroethylene coating, the precipitation hardening stainless steel layer comprises a rolling bearing steel layer, the bottom of the rolling bearing steel layer is coated with an epoxy coal tar pitch anticorrosive paint, the bottom of the epoxy coal tar pitch anticorrosive paint is coated with a PU coating, and the thickness of the PU coating is zero and three millimeters. According to the utility model, through the arrangement of the acrylic enamel, the precipitation hardening stainless steel layer, the alloy cutting tool steel layer and the polytetrafluoroethylene coating, the problems that the existing screw is poor in corrosion resistance effect, the service life of the screw is reduced, the screw is not firm due to long-time rust, the market share is reduced, and the use requirement of people cannot be met are solved.

Description

Self-tapping screw

Technical Field

The utility model relates to the technical field of screws, in particular to a self-tapping screw.

Background

The screw is a tool for progressively fastening a machine part by utilizing the physical and mathematical principles of the inclined plane circular rotation and friction force of an object, the screw is a general expression of a fastener, a daily spoken language, and the screw is an indispensable industrial necessity in daily life: very small screws for use in cameras, spectacles, watches, electronics, etc.; general screws for televisions, electrical products, musical instruments, furniture, and the like; as for engineering, construction and bridge, large-scale screws and nuts are used; the screw is a common utility model in production and life of people for thousands of years, and is the first utility model of human beings according to the application field, but the existing screw has poor corrosion resistance effect, the service life of the screw is reduced, the screw is not firm due to long-time rust, the market share is reduced, and the use requirement of people cannot be met.

Disclosure of Invention

The utility model aims to provide a self-tapping screw, which has the advantage of corrosion resistance, and solves the problems that the existing screw is poor in corrosion resistance effect, the service life of the screw is reduced, the screw is not firm due to long-time rust, the market share is reduced, and the use requirement of people cannot be met.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the self-tapping screw comprises a screw body, wherein the screw body comprises acrylic enamel, a precipitation hardening stainless steel layer is fixedly connected to the top of the acrylic enamel, an alloy cutting tool steel layer is fixedly connected to the top of the precipitation hardening stainless steel layer, and a polytetrafluoroethylene coating is coated on the top of the alloy cutting tool steel layer.

Preferably, the precipitation hardening stainless steel layer comprises a rolling bearing steel layer, and the bottom of the rolling bearing steel layer is coated with epoxy coal tar pitch anticorrosive paint.

Preferably, the bottom of the epoxy coal tar pitch anticorrosive paint is coated with a PU coating, and the thickness of the PU coating is zero and three millimeters.

Preferably, the alloy cutting tool steel layer comprises a tungsten carbide metal coating, and the bottom of the tungsten carbide metal coating is coated with an ultra-high molecular weight polyethylene coating.

Preferably, the thickness of the tungsten carbide metal coating is zero and two millimeters, and the tungsten carbide metal coating and the ultra-high molecular weight polyethylene coating are connected through the PA coating.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, through the arrangement of the acrylic enamel, the precipitation hardening stainless steel layer, the alloy cutting tool steel layer and the polytetrafluoroethylene coating, the problems that the existing screw is poor in corrosion resistance effect, the service life of the screw is reduced, the screw is not firm due to long-time rust, the market share is reduced, and the use requirement of people cannot be met are solved.

2. The utility model has the advantages of high strength, high hardness, high elastic limit and high contact fatigue strength through the arrangement of the rolling bearing steel layer, and has the advantages of excellent adhesive force, impact resistance, water resistance, superior drying performance, high rust resistance and good chemical resistance through the arrangement of the epoxy coal tar pitch anticorrosive paint.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the screw body structure of the present utility model;

FIG. 3 is a cross-sectional view of a precipitation-hardenable stainless steel layer structure of the present utility model;

fig. 4 is a cross-sectional view of the steel layer structure of the alloy cutting tool of the present utility model.

In the figure: 1. a screw body; 101. acrylic enamel; 102. a precipitation hardening stainless steel layer; 1021. a rolling bearing steel layer; 1022. epoxy coal pitch anticorrosive paint; 1023. a PU coating; 103. alloy cutting tool steel layer; 1031. a tungsten carbide metal coating; 1032. an ultra-high molecular weight polyethylene coating; 104. and (3) a polytetrafluoroethylene coating.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, a self-tapping screw comprises a screw body 1, wherein the screw body 1 comprises an acrylic enamel 101, a precipitation hardening stainless steel layer 102 is fixedly connected to the top of the acrylic enamel 101, an alloy cutting tool steel layer 103 is fixedly connected to the top of the precipitation hardening stainless steel layer 102, a polytetrafluoroethylene coating 104 is coated on the top of the alloy cutting tool steel layer 103, the advantages of good gloss and color retention, paint film abrasion resistance, collision resistance, salt water resistance, mineral oil resistance and corrosion resistance are achieved through the arrangement of the acrylic enamel 101, the advantages of corrosion resistance, ultra-high strength, abrasion resistance and rust resistance are achieved through the arrangement of the precipitation hardening stainless steel layer 102, and the advantages of good coating strength, abrasion resistance, moisture resistance, low temperature resistance and corrosion resistance are achieved through the arrangement of the polytetrafluoroethylene coating 104, and the advantages of excellent chemical stability, very high heat resistance, very low friction coefficient and corrosion resistance are achieved through the arrangement of the alloy cutting tool steel layer 103.

The precipitation hardening stainless steel layer 102 comprises a rolling bearing steel layer 1021, the bottom of the rolling bearing steel layer 1021 is coated with an epoxy coal tar pitch anticorrosive paint 1022, and the rolling bearing steel layer 1021 has the advantages of high strength, high hardness, high elastic limit and contact fatigue strength through the arrangement of the rolling bearing steel layer 1021, and has the advantages of excellent adhesive force, impact resistance, water resistance, drying performance supergroup, high rust resistance and good chemicals resistance through the arrangement of the epoxy coal tar pitch anticorrosive paint 1022.

The bottom of the epoxy coal tar pitch anticorrosion paint 1022 is coated with a PU coating 1023, and the PU coating 1023 has a thickness of zero three millimeters.

The alloy blade steel layer 103 comprises a tungsten carbide metal coating 1031, and the bottom of the tungsten carbide metal coating 1031 is coated with an ultra-high molecular weight polyethylene coating 1032.

The tungsten carbide metal coating 1031 has a thickness of zero two millimeters, and the tungsten carbide metal coating 1031 and the ultra-high molecular weight polyethylene coating 1032 are connected by a PA coating.

When in use, the acrylic enamel 101 has the advantages of good gloss and color retention, wear resistance, collision resistance, salt water resistance, mineral oil resistance and corrosion resistance, the precipitation hardening stainless steel layer 102 has the advantages of corrosion resistance, ultra-high strength, wear resistance and rust resistance, the alloy cutting tool steel layer 103 has the advantages of good coating strength, wear resistance, moisture resistance, low temperature resistance and corrosion resistance, and the polytetrafluoroethylene coating 104 has the advantages of excellent chemical stability, high heat resistance, cold resistance, low friction coefficient and corrosion resistance.

Although embodiments of the present utility model 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 therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Self-tapping screw, including screw body (1), its characterized in that: the screw body (1) comprises acrylic enamel (101), a precipitation hardening stainless steel layer (102) is fixedly connected to the top of the acrylic enamel (101), an alloy cutting tool steel layer (103) is fixedly connected to the top of the precipitation hardening stainless steel layer (102), and a polytetrafluoroethylene coating (104) is coated on the top of the alloy cutting tool steel layer (103).

2. A self-tapping screw as claimed in claim 1, wherein: the precipitation hardening stainless steel layer (102) comprises a rolling bearing steel layer (1021), and the bottom of the rolling bearing steel layer (1021) is coated with epoxy coal tar pitch anticorrosive paint (1022).

3. A self-tapping screw as claimed in claim 2, wherein: the bottom of the epoxy coal tar pitch anticorrosive paint (1022) is coated with a PU coating (1023), and the thickness of the PU coating (1023) is zero and three millimeters.

4. A self-tapping screw as claimed in claim 1, wherein: the alloy cutting tool steel layer (103) comprises a tungsten carbide metal coating (1031), and the bottom of the tungsten carbide metal coating (1031) is coated with an ultra-high molecular weight polyethylene coating (1032).

5. A self-tapping screw as set forth in claim 4, wherein: the thickness of the tungsten carbide metal coating (1031) is zero and two millimeters, and the tungsten carbide metal coating (1031) and the ultra-high molecular weight polyethylene coating (1032) are connected through the PA coating.