CN111570694A - Screw production process with good corrosion resistance - Google Patents
Screw production process with good corrosion resistance Download PDFInfo
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- CN111570694A CN111570694A CN202010435894.2A CN202010435894A CN111570694A CN 111570694 A CN111570694 A CN 111570694A CN 202010435894 A CN202010435894 A CN 202010435894A CN 111570694 A CN111570694 A CN 111570694A
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- screw
- corrosion resistance
- treatment
- good corrosion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/44—Making machine elements bolts, studs, or the like
- B21K1/46—Making machine elements bolts, studs, or the like with heads
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention relates to the technical field of screw production, in particular to a screw production process with good corrosion resistance, which comprises the following steps: s1 preparation material → S2 upsetting → S3 one-time processing → S4 grinding → S5 rounding → S6 twisting → S7 two-time processing → S8 plating → S9 performance detection. Compared with the traditional hot forging process, the process has the advantages that about five thousand weather-resistant screws are formed every day, the process of the embodiment is adopted, about twenty-five thousand weather-resistant screws are formed every day, the production efficiency is improved, the produced titanium alloy screws not only have high hardness and high tensile strength required by the standard of 12.9-grade steel screws, but also have good corrosion resistance, can resist high temperature of more than 400 ℃, are non-conductive, non-magnetic and non-hydrogen, and are particularly suitable for various projects; and the new production process has high processing efficiency and low processing cost.
Description
Technical Field
The invention relates to the technical field of screw production, in particular to a screw production process with good corrosion resistance.
Background
At present, a screw consists of a head part and a screw rod, and is required to be matched with a nut and used for fastening and connecting two parts with through holes. The screw is widely applied to various industries, different application scenes have different requirements on the screw, and the screw is required to have high hardness and tensile strength and high corrosion resistance in some special scenes, so that the screw has high requirements on the material and the preparation process of the screw, the manufacturing efficiency is low, and the cost is high.
Disclosure of Invention
The invention aims to provide a screw production process with good corrosion resistance, and aims to solve the problems of low manufacturing efficiency and high cost of the existing corrosion-resistant screws in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a screw production process with good corrosion resistance comprises the following steps:
s1 preparation of material: selecting a titanium alloy material as a screw blank, and selecting a corresponding material rod diameter according to the required product specification;
s2 upsetting: heating the blank to 750-800 ℃, and performing upsetting for 3-5 times in a screw die to form a rod part, a head part and a lower R angle of the screw;
s3 primary processing: removing surface dirt generated by upsetting through acid washing, and performing heat treatment in a vacuum water quenching furnace;
s4 grinding: the rod part is ground in a grinding machine to be standard in rod diameter, and the rod diameter and the nut are subjected to corner removing treatment in the grinding machine;
s5 rounding: putting the steel plate into a rolling R machine for fillet strengthening;
s6 twist grain: putting the thread into a twisting machine for thread treatment to achieve the required thread, and unhairing burrs on the surface of the thread;
and S7 secondary processing: removing surface oil stain by acid cleaning for the second time, and carrying out heat preservation treatment in a vacuum aging furnace;
s8 electroplating: taking out the screw after heat preservation, air-cooling to room temperature, and then putting the screw into an electroplating machine for electroplating treatment;
and (S9) performance detection: and (5) carrying out performance detection and packaging.
Preferably, the temperature of the vacuum water quenching furnace for the primary treatment is 900-.
Preferably, the grinding machine is embodied as a centerless bed.
Preferably, the temperature of the vacuum aging furnace for the secondary treatment is 700-750 ℃, and the heat preservation treatment time is 3-5 hours.
Preferably, the heating temperature during the stranding process is 200-500 ℃.
Preferably, the performance test comprises size test and mechanical test, and the torque coefficient and the standard deviation of the torque coefficient are detected.
Preferably, the primary treatment and the secondary treatment acid washing process both comprise the following steps:
s1: soaking the screw in 15-18% concentration hydrochloric acid for several minutes;
s2, taking out the screw, soaking the screw in clear water for several minutes, and taking out the screw;
s3, soaking the screw in oxalic acid for several minutes;
s4, placing the screw in a phosphate solution to soak for several minutes;
s5, soaking the screws in clear water for several minutes and then taking out the screws.
Preferably, the electroplating treatment specifically includes the steps of: the screws are immersed in an aqueous solution containing the metal compound to be deposited, and an electric current is passed through the plating solution to cause the plating metal to precipitate and deposit on the parts.
Preferably, the metal compound to be electroplated includes zinc plating, copper, nickel, chromium, copper-nickel alloy.
Compared with the prior art, the invention has the beneficial effects that: compared with the traditional hot-forging process, the process for producing the screw has the advantages that about five thousand weather-resistant screws are formed every day, the production efficiency is improved, the weather-resistant screws formed every day can reach about twenty-five thousand weather-resistant screws after the process of the embodiment is adopted, the service life of the screw prepared from the titanium alloy material is long, so that the titanium alloy screw can meet the standard requirement of a national standard 12.9-grade steel screw, the produced titanium alloy screw not only has high hardness and high tensile strength required by the standard of the 12.9-grade steel screw, but also has good corrosion resistance, can resist high temperature of more than 400 ℃, is non-conductive, non-magnetic and non-hydrogen, and is particularly suitable for various projects; and the new production process has high processing efficiency and low processing cost.
Drawings
FIG. 1 is a production flow chart of the screw production process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A screw production process with good corrosion resistance comprises the following steps:
s1 preparation of material: selecting a titanium alloy material as a screw blank, and selecting a corresponding material rod diameter according to the required product specification;
s2 upsetting: heating the blank to 750-800 ℃, and performing upsetting for 3-5 times in a screw die to form a rod part, a head part and a lower R angle of the screw;
s3 primary processing: removing surface dirt generated by upsetting through acid washing, and performing heat treatment in a vacuum water quenching furnace;
s4 grinding: the rod part is ground in a grinding machine to be standard in rod diameter, and the rod diameter and the nut are subjected to corner removing treatment in the grinding machine;
s5 rounding: putting the steel plate into a rolling R machine for fillet strengthening;
s6 twist grain: putting the thread into a twisting machine for thread treatment to achieve the required thread, and unhairing burrs on the surface of the thread;
and S7 secondary processing: removing surface oil stain by acid cleaning for the second time, and carrying out heat preservation treatment in a vacuum aging furnace;
s8 electroplating: taking out the screw after heat preservation, air-cooling to room temperature, and then putting the screw into an electroplating machine for electroplating treatment;
and (S9) performance detection: and (5) carrying out performance detection and packaging.
In particular, the grinding machine is embodied as a centerless bed. The heating temperature in the twisted thread treatment process is 200-500 ℃.
Further, the performance detection comprises size detection and mechanical detection, and the torque coefficient and the standard deviation of the torque coefficient are detected.
It is worth to be noted that the primary treatment and the secondary treatment acid washing process both specifically comprise the following steps:
s1: soaking the screw in 15-18% concentration hydrochloric acid for several minutes;
s2, taking out the screw, soaking the screw in clear water for several minutes, and taking out the screw;
s3, soaking the screw in oxalic acid for several minutes;
s4, placing the screw in a phosphate solution to soak for several minutes;
s5, soaking the screws in clear water for several minutes and then taking out the screws.
Specifically, the temperature of a vacuum water quenching furnace for primary treatment is 900-.
The electroplating treatment in the embodiment specifically includes the following steps: the screw is immersed in an aqueous solution containing a deposited metal compound, and an electric current is passed through a plating solution to cause the plating metal to be precipitated and deposited on the component, wherein the plated metal compound comprises zinc plating, copper plating, nickel plating, chromium plating and copper-nickel alloy plating treatment is carried out to prevent the corrosion phenomena such as oxidation and rusting of the screw and prolong the service life of the screw and the fixed object.
Compared with the traditional hot-forging process, about five thousand weather-resistant screws are formed every day, the process of the embodiment is adopted, the weather-resistant screws formed every day reach about twenty-five thousand, the production efficiency is improved, the service life of the screws prepared by the titanium alloy material is long, so that the titanium alloy screws reach the standard requirement of national standard 12.9-grade steel screws, the produced titanium alloy screws not only have high hardness and high tensile strength required by the standard requirement of the 12.9-grade steel screws, but also have good corrosion resistance, can resist high temperature of more than 400 ℃, are non-conductive, non-magnetic and non-hydrogen, and are particularly suitable for ocean engineering; and the new production process has high processing efficiency and low processing cost.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A screw production process with good corrosion resistance is characterized in that: the method comprises the following steps:
s1 preparation of material: selecting a titanium alloy material as a screw blank, and selecting a corresponding material rod diameter according to the required product specification;
s2 upsetting: heating the blank to 750-800 ℃, and performing upsetting for 3-5 times in a screw die to form a rod part, a head part and a lower R angle of the screw;
s3 primary processing: removing surface dirt generated by upsetting through acid washing, and performing heat treatment in a vacuum water quenching furnace;
s4 grinding: the rod part is ground in a grinding machine to be standard in rod diameter, and the rod diameter and the nut are subjected to corner removing treatment in the grinding machine;
s5 rounding: putting the steel plate into a rolling R machine for fillet strengthening;
s6 twist grain: putting the thread into a twisting machine for thread treatment to achieve the required thread, and unhairing burrs on the surface of the thread;
and S7 secondary processing: removing surface oil stain by acid cleaning for the second time, and carrying out heat preservation treatment in a vacuum aging furnace;
s8 electroplating: taking out the screw after heat preservation, air-cooling to room temperature, and then putting the screw into an electroplating machine for electroplating treatment;
and (S9) performance detection: and (5) carrying out performance detection and packaging.
2. The screw production process with good corrosion resistance according to claim 1, which is characterized in that: the temperature of the vacuum water quenching furnace for primary treatment is 900-.
3. The screw production process with good corrosion resistance according to claim 1, which is characterized in that: the grinding machine is embodied as a centerless bed.
4. The screw production process with good corrosion resistance according to claim 1, which is characterized in that: the temperature of the vacuum aging furnace for the secondary treatment is 700-750 ℃, and the heat preservation treatment time is 3-5 hours.
5. The screw production process with good corrosion resistance according to claim 1, which is characterized in that: the heating temperature in the twisted thread treatment process is 200-500 ℃.
6. The screw production process with good corrosion resistance according to claim 1, which is characterized in that: the performance detection comprises size detection and mechanical detection, and detects the torque coefficient and the standard deviation of the torque coefficient.
7. The screw production process with good corrosion resistance according to claim 1, which is characterized in that: the primary treatment and the secondary treatment pickling process respectively comprise the following steps:
s1: soaking the screw in 15-18% concentration hydrochloric acid for several minutes;
s2, taking out the screw, soaking the screw in clear water for several minutes, and taking out the screw;
s3, soaking the screw in oxalic acid for several minutes;
s4, placing the screw in a phosphate solution to soak for several minutes;
s5, soaking the screws in clear water for several minutes and then taking out the screws.
8. The screw production process with good corrosion resistance according to claim 1, which is characterized in that: the electroplating treatment specifically comprises the following steps: the screws are immersed in an aqueous solution containing the metal compound to be deposited, and an electric current is passed through the plating solution to cause the plating metal to precipitate and deposit on the parts.
9. The screw production process with good corrosion resistance according to claim 8, characterized in that: the metal compound for electroplating comprises zinc plating, copper, nickel, chromium and copper-nickel alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010435894.2A CN111570694A (en) | 2020-05-21 | 2020-05-21 | Screw production process with good corrosion resistance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010435894.2A CN111570694A (en) | 2020-05-21 | 2020-05-21 | Screw production process with good corrosion resistance |
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| CN111570694A true CN111570694A (en) | 2020-08-25 |
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| CN202010435894.2A Pending CN111570694A (en) | 2020-05-21 | 2020-05-21 | Screw production process with good corrosion resistance |
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Citations (9)
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|---|---|---|---|---|
| US20060234800A1 (en) * | 2005-03-30 | 2006-10-19 | Honda Motor Co., Ltd. | Titanium alloy bolt and its manufacturing process |
| CN104439935A (en) * | 2014-11-06 | 2015-03-25 | 无锡市百顺机械厂 | Bolt manufacturing process |
| EP2982771A1 (en) * | 2013-04-05 | 2016-02-10 | Taeyang Metal Industrial Co., Ltd. | Method for manufacturing high-strength bolt having excellent tensile strength |
| CN109483156A (en) * | 2017-09-13 | 2019-03-19 | 南京美克斯精密机械有限公司 | A kind of bolt processing method |
| CN109514191A (en) * | 2018-11-19 | 2019-03-26 | 贵阳华丰航空科技有限公司 | A kind of screw processing and forming technology with latching characteristics of aircraft utilization |
| CN110369953A (en) * | 2019-07-19 | 2019-10-25 | 苏州中新精密工业有限公司 | A kind of production technology of screw |
| CN110421318A (en) * | 2019-07-24 | 2019-11-08 | 王丽 | A kind of aero titanium alloy high locked bolts processing technology |
| CN110524200A (en) * | 2019-09-04 | 2019-12-03 | 王丽 | Titanium alloy bolt production technology |
| CN110863157A (en) * | 2019-11-28 | 2020-03-06 | 苏州法思特精密五金有限公司 | Corrosion-resistant machining forming process for stainless steel screw |
-
2020
- 2020-05-21 CN CN202010435894.2A patent/CN111570694A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060234800A1 (en) * | 2005-03-30 | 2006-10-19 | Honda Motor Co., Ltd. | Titanium alloy bolt and its manufacturing process |
| EP2982771A1 (en) * | 2013-04-05 | 2016-02-10 | Taeyang Metal Industrial Co., Ltd. | Method for manufacturing high-strength bolt having excellent tensile strength |
| CN104439935A (en) * | 2014-11-06 | 2015-03-25 | 无锡市百顺机械厂 | Bolt manufacturing process |
| CN109483156A (en) * | 2017-09-13 | 2019-03-19 | 南京美克斯精密机械有限公司 | A kind of bolt processing method |
| CN109514191A (en) * | 2018-11-19 | 2019-03-26 | 贵阳华丰航空科技有限公司 | A kind of screw processing and forming technology with latching characteristics of aircraft utilization |
| CN110369953A (en) * | 2019-07-19 | 2019-10-25 | 苏州中新精密工业有限公司 | A kind of production technology of screw |
| CN110421318A (en) * | 2019-07-24 | 2019-11-08 | 王丽 | A kind of aero titanium alloy high locked bolts processing technology |
| CN110524200A (en) * | 2019-09-04 | 2019-12-03 | 王丽 | Titanium alloy bolt production technology |
| CN110863157A (en) * | 2019-11-28 | 2020-03-06 | 苏州法思特精密五金有限公司 | Corrosion-resistant machining forming process for stainless steel screw |
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Application publication date: 20200825 |