CN111379777B - Method for manufacturing corrosion-resistant self-tapping screw and product thereof - Google Patents
Method for manufacturing corrosion-resistant self-tapping screw and product thereof Download PDFInfo
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- CN111379777B CN111379777B CN201911232416.5A CN201911232416A CN111379777B CN 111379777 B CN111379777 B CN 111379777B CN 201911232416 A CN201911232416 A CN 201911232416A CN 111379777 B CN111379777 B CN 111379777B
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- self
- tapping screw
- paint
- corrosion
- rust
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 72
- 238000005260 corrosion Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 230000007797 corrosion Effects 0.000 title claims description 15
- 239000003973 paint Substances 0.000 claims abstract description 59
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims abstract description 20
- 239000011521 glass Substances 0.000 claims abstract description 19
- 239000011324 bead Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- 238000010009 beating Methods 0.000 claims abstract description 3
- 238000007605 air drying Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 9
- 239000000565 sealant Substances 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 5
- 238000007598 dipping method Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000002829 reductive effect Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000002344 surface layer Substances 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 abstract 1
- 238000009740 moulding (composite fabrication) Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 21
- 239000000758 substrate Substances 0.000 description 10
- 239000001993 wax Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000003570 air Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000005480 shot peening Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000001029 thermal curing Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/06—Surface treatment of parts furnished with screw-thread, e.g. for preventing seizure or fretting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a method for manufacturing rust-proof self-tapping screws and a product thereof, wherein the method comprises the steps of bombarding dimples on the surfaces of the self-tapping screws by metal glass particles in a bead beating mode; then forming, dipping or coating anti-corrosion paint, anti-rust paint or anti-rust coating (containing anti-rust wax) to obtain the self-tapping screw with anti-rust function. After the self-tapping screw is tapped into the base material, even if the paint or coating on the surface layer of the screw is scraped, the paint or coating in the micro-pit can be squeezed into the gap between the self-tapping screw and the notch of the base material under the extrusion action of the compression stress when the self-tapping screw is tapped, so that the gap is filled with the paint or coating, the sealant can prevent surrounding air and water vapor from entering the gap, the screw and the notch of the base material are ensured not to be corroded, the service life of the structure of the screw and the notch of the base material can be prolonged, and the construction and maintenance cost is greatly reduced.
Description
Technical Field
The invention relates to a screw, in particular to a method for manufacturing an anti-corrosion self-tapping screw and a product thereof.
Background
The surfaces of the existing steel plates, corrugated plates and the like are treated by baking varnish for rust prevention, and brackets and section steel are mostly subjected to hot dip galvanizing for rust prevention. These rust-preventive means can effectively protect the substrate from rusting before the rust-preventive layer is destroyed. However, after drilling and installation, the rust-proof layer is damaged, and the cut of the screw tap is not protected by the rust-proof layer, so that corrosion and rust are generated from the drilling position and further diffused to other surfaces, and the rust-proof layer is peeled off in a whole piece.
Some methods are to drill holes, clean the drilled holes, then coat hole sealing paint or antirust paint, and then lock the drilled holes with screws and nuts subjected to antirust treatment. However, this method is time-consuming and labor-consuming, and the labor time and labor cost are greatly increased, so that it is almost impossible to construct the concrete. The current conventional method is to use a self-tapping screw to directly tap and lock and then spray paint on the nut. The method can be rapidly failed in a corrosive or polluted environment, such as high-salinity environment like sea and coasts, or places with strong sunshine and wind and rain on roofs, which can cause paint spraying cracking and lose the corrosion protection effect.
In addition, the self-tapping screw used for the metal plates such as steel plate, aluminum plate, etc. combines the actions of drilling and tapping, and the metal of the substrate and the screw are tightly worn without any gap, so if the self-tapping screw is first painted with the anti-rust paint on the outer surface, the paint will be removed and will not enter the gap of the self-tapping screw, so the gap will not resist the penetration of oxygen, moisture, salt, etc. and the corrosion and rust will occur.
Disclosure of Invention
The invention aims to provide a method for manufacturing an anti-corrosion self-tapping screw, which comprises the following steps:
(1) Performing a bead striking on a surface of a tapping screw, comprising:
bombarding the surface of the self-tapping screw by metal glass particles under the pressure of compressed inert gas to form micro-pits on the surface, and forming a layer of metal glass film on the surface of the self-tapping screw after the metal glass particles are bead-struck, wherein the metal glass film can strengthen the surface hardness and strength of the self-tapping screw and endow the self-tapping screw with an anti-corrosion function; and
(2) And (3) forming, impregnating or coating the self-tapping screw subjected to bead beating on the surface containing the micro-pits with anti-corrosion paint or coating to obtain the self-tapping screw with the anti-corrosion function.
In some embodiments, the rust inhibitive paint or coating is selected from: natural air-drying type paint, heat-hardening type paint, ultraviolet-hardening type paint, paint formed by mixing and crosslinking two agents when in use, or anti-rusting wax.
The invention also discloses the rust-proof self-tapping screw prepared by the method for manufacturing the rust-proof self-tapping screw.
The beneficial technical effects of the invention are as follows:
the method of the invention firstly uses the shot peening mode to shoot dense micro-pits (micro-dimples) on the surface of the self-tapping screw by metal glass particles, thus strengthening the hardness of the surface and endowing the surface with corrosion resistance; then, the self-tapping screw with the anti-corrosion function is manufactured by using a formed (forming), dipped (dipping) or coated (coating) thin layer of anti-corrosion paint, anti-corrosion paint or anti-corrosion coating (containing anti-corrosion wax). After the tapping screw is tapped into a substrate (or a base material), even if paint or a coating on the surface layer of the tapping screw is scraped, the paint or the coating in the micro-pit can be squeezed into a gap between the tapping screw and the substrate under the squeezing action of pressure stress (compressive stress) during tapping of the tapping screw, so that the gap is filled, and like a sealant (sealant), the gap is prevented from being filled with ambient air and water vapor, so that the notches of the tapping screw and the base material are not corroded, the structural life of the tapping screw and the base material can be prolonged, and the construction and maintenance cost is greatly reduced.
Drawings
FIG. 1 is a cross-sectional view of the tapping screw of the present invention after being struck with a bead;
FIG. 2 is a cross-sectional view of a self-tapping screw after being hit by a ball after being formed, impregnated, or coated with a rust inhibitive paint;
FIG. 3 is an enlarged partial cross-sectional view taken at the reference numeral in FIG. 2;
FIG. 4 is an enlarged partial cross-sectional view of a self-tapping screw of the present invention coated with a rust inhibitive paint locked into a substrate to observe the relationship between the screw and the cut of the substrate.
Symbolic description in the drawings:
1. self-tapping screws;
11. micro-pits;
12. an anti-corrosion paint layer;
121. an outer layer of anti-rust paint;
122. an inner layer of anti-rust paint;
s, a base material;
s1, cutting;
p-compressive stress.
Detailed Description
The concrete embodiment of the present invention will be apparent from the following description taken in conjunction with the accompanying drawings, and the following will gradually explain the method of manufacturing the corrosion-resistant self-tapping screw of the present invention:
(1) Performing bead peening (shot peening) on the surface of the tapping screw:
on the surface of the self-tapping screw 1, metal glass particles are bombarded on the surface of the self-tapping screw 1 under the high pressure of compressed inert gas, so that dense micro-pits 11 (micro-dimples) are formed, the diameter of each micro-pit is between 1 micron and 50 microns, as shown in figure 1, like small cavities on a golf ball, after the metal glass particles are impacted, a thin metal glass film is formed on the surface of the self-tapping screw, and the metal glass film strengthens the hardness and the strength of the surface of the self-tapping screw and endows the self-tapping screw with the function of rust prevention.
(2) Forming (forming), impregnating (impregnating) or coating (coating) an anti-corrosion paint layer 12 (shown in figures 2 and 3) on the surface containing the micro-pits 11 by the bead-blasted self-tapping screw 1:
if the dipping (dipping) mode is adopted, the tapping screws are put into a container filled with anti-rust paint to be dipped for a period of time (several hours), so that the anti-rust paint permeates into the surfaces of the tapping screws and the dense micro-cells 11, thereby forming an anti-rust paint layer 12 on the surfaces of the tapping screws 1, after the dipping is finished, the tapping screws dipped with the anti-rust paint are placed on a net rack, redundant anti-rust paint on the screws is filtered in the dripping (driin) mode and the like, and a centrifuge can be used for centrifugally separating and recycling the residual anti-rust paint if necessary. If the adhered rust-proof paint is coated on the surface of the screw in a thin layer, the operation of centrifugal separation is not needed.
The anti-corrosion paint or coating can be selected from natural air-drying paint, thermal curing paint, ultraviolet curing paint or paint formed by mixing and crosslinking A and B agents during use, and the invention is not limited.
Of course, the present invention may also use the rust-resistant wax (wax) as the rust-resistant coating.
The anti-rust paint or coating used in the present invention can be purchased from commercially available anti-rust paints or coatings or waxes, which are known materials and will not be described in detail, and the anti-rust paints or coatings are worth mentioning: after the anti-rust paint used by the invention is dipped or coated on the surface of the self-tapping screw, the anti-rust paint can be dried by natural air drying and can be dried and hardened by heating if necessary. In order to ensure that the self-tapping screws impregnated or coated with the anti-corrosion paint are isolated from the air, a plurality of self-tapping screws dipped with the anti-corrosion paint can be sealed into a sealed bag, and the self-tapping screws are taken out of the sealed bag by constructors for use when in use, so that the anti-corrosion paint is not easy to dry, is isolated from the air (or water vapor) at all times, and can be kept fresh and taken immediately.
The self-tapping screw 1 dip-coated with the anti-corrosive paint layer 12 of the present invention is locked into the substrate S, as shown in fig. 4, due to the force applied by the tapping screw 1 and the notch S1 of the substrate S, a plurality of outer anti-corrosive paint layers 121 on the surface will be scraped by friction, but the inner anti-corrosive paint layer 122 located in the micro-cavity 11 can be squeezed into the gap of the notch S1 due to the squeezing action of the compressive stress (P) applied by the tapping, like the sealant (sealant) to fill and seal the gap between the screw 1 and the notch S1 of the substrate S, so that the external air and moisture are isolated and cannot permeate, and at this time, the anti-corrosive paint layer 12 effectively exerts the functions of anti-corrosive and anti-corrosive.
The invention has the following advantages:
1. because the surface of the self-tapping screw is provided with the dense and hemp micro-pits 11, the inner layer 122 of the anti-corrosion paint existing in each micro-pit 11 can be extruded out by compressive stress during tapping construction, and automatically fills a gap between the screw and the notch (S1) of the substrate, such as a sealant, so that the gap is isolated from the outside and the anti-corrosion effect is achieved;
2. the construction is simple and convenient, the service life of the structure can be prolonged, and the construction and maintenance cost is greatly reduced;
3. when the metal glass bead is hit, the surface of the self-tapping screw is hit to form a metal glass thin layer, the hardness and the strength of the metal glass thin layer are strengthened, and the metal glass thin layer has corrosion resistance, and after the metal glass thin layer is dipped and coated with the corrosion-resistant paint, the corrosion-resistant effect of the self-tapping screw is enhanced.
When the alternative energy is sought, the popularization of solar energy is vigorously developed and is not obvious. However, the solar panels are constructed outdoors and in open areas or at seas and rivers and are subjected to sun and rain, moisture or salt (seas) erosion, and the solar panels cannot be used due to corrosion of fixing screws, so that the solar panels need to be preserved and replaced with new ones, and the maintenance cost is greatly increased. The invention can overcome the problem of corrosion of outdoor projects which need to be screwed tightly by screws with large seaside, can prolong the service life of related projects even though only small self-tapping screws are used, and has huge economic and practical values.
The present invention may be modified or changed appropriately without departing from the spirit and scope of the present invention, and the present invention should not be limited thereto.
Claims (3)
1. A method for manufacturing a rust-resistant self-tapping screw, characterized by comprising the steps of:
(1) Performing a bead striking on a surface of a tapping screw, comprising:
bombarding the surface of the self-tapping screw by metal glass particles under the pressure of compressed inert gas to form micro-pits on the surface, and forming a layer of metal glass film on the surface of the self-tapping screw after the metal glass particles are bead-struck, wherein the metal glass film can strengthen the surface hardness and strength of the self-tapping screw and endow the self-tapping screw with an anti-corrosion function; and
(2) And (3) forming, impregnating or coating the self-tapping screw subjected to bead beating on the surface containing the micro-pits with anti-corrosion paint or coating to obtain the self-tapping screw with the anti-corrosion function.
2. A method of making a corrosion-resistant, self-tapping screw as claimed in claim 1, wherein the corrosion-resistant paint or coating is selected from the group consisting of: natural air-drying type paint, heat-hardening type paint, ultraviolet-hardening type paint, paint formed by mixing and crosslinking two agents when in use, or anti-rusting wax.
3. A corrosion-resistant self-tapping screw produced by the method for producing a corrosion-resistant self-tapping screw according to claim 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW107147725 | 2018-12-28 | ||
| TW107147725A TWI683967B (en) | 2018-12-28 | 2018-12-28 | Method and product for manufacturing anti-corrosion self-tapping screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111379777A CN111379777A (en) | 2020-07-07 |
| CN111379777B true CN111379777B (en) | 2023-03-14 |
Family
ID=70413171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911232416.5A Active CN111379777B (en) | 2018-12-28 | 2019-12-05 | Method for manufacturing corrosion-resistant self-tapping screw and product thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111379777B (en) |
| TW (1) | TWI683967B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003184883A (en) * | 2001-12-20 | 2003-07-03 | Nissan Motor Co Ltd | Bearing sliding member |
| CN101103221A (en) * | 2005-01-13 | 2008-01-09 | 住友金属工业株式会社 | Threaded joint for steel pipes |
| CN101379307A (en) * | 2006-02-10 | 2009-03-04 | 三菱重工业株式会社 | Bolt and method for manufacturing bolt |
| CN102449177A (en) * | 2009-05-29 | 2012-05-09 | 住友电气工业株式会社 | Linear object, bolt, nut and washer each comprising magnesium alloy |
| CN107841175A (en) * | 2017-10-27 | 2018-03-27 | 安徽瑞合铁路紧固件科技有限公司 | A kind of chromium-free Dyclo paint of rub resistance |
| CN108687278A (en) * | 2017-03-29 | 2018-10-23 | 丰田自动车株式会社 | Roll the manufacturing method of bolt |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004060873A (en) * | 2002-07-31 | 2004-02-26 | Nippon Piston Ring Co Ltd | Piston ring and its manufacturing method |
| EP1712659A1 (en) * | 2005-04-11 | 2006-10-18 | Elisha Holding LLC | Corrosion resistant article and method of production thereof |
| TWM504649U (en) * | 2015-05-05 | 2015-07-11 | Tai Yi Precise Ind Co Ltd | Improved shop peening structure of titanium screws |
-
2018
- 2018-12-28 TW TW107147725A patent/TWI683967B/en active
-
2019
- 2019-12-05 CN CN201911232416.5A patent/CN111379777B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003184883A (en) * | 2001-12-20 | 2003-07-03 | Nissan Motor Co Ltd | Bearing sliding member |
| CN101103221A (en) * | 2005-01-13 | 2008-01-09 | 住友金属工业株式会社 | Threaded joint for steel pipes |
| CN101379307A (en) * | 2006-02-10 | 2009-03-04 | 三菱重工业株式会社 | Bolt and method for manufacturing bolt |
| CN102449177A (en) * | 2009-05-29 | 2012-05-09 | 住友电气工业株式会社 | Linear object, bolt, nut and washer each comprising magnesium alloy |
| CN108687278A (en) * | 2017-03-29 | 2018-10-23 | 丰田自动车株式会社 | Roll the manufacturing method of bolt |
| CN107841175A (en) * | 2017-10-27 | 2018-03-27 | 安徽瑞合铁路紧固件科技有限公司 | A kind of chromium-free Dyclo paint of rub resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI683967B (en) | 2020-02-01 |
| TW202026539A (en) | 2020-07-16 |
| CN111379777A (en) | 2020-07-07 |
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