阅读说明：本技术 一种防腐性能好的螺丝生产工艺 (Screw production process with good corrosion resistance ) 是由 曾飚 曾煚 于 2020-05-21 设计创作，主要内容包括：本发明涉及螺丝生产技术领域,具体地说,涉及一种防腐性能好的螺丝生产工艺,包括如下步骤：S1准备材料→S2镦制→S3一次处理→S4打磨→S5圆化→S6绞纹→S7二次处理→S8电镀→S9性能检测。本发明步骤简单,能减少人工操作,提高生产效率,相较于以前热打工艺,每天成型五千支左右耐候螺丝而言,采用本实施例的工艺后,每天成型的耐候螺丝达到二万五千支左右,提高生产效率,生产的钛合金螺丝不仅具备12.9级钢制螺丝标准要求的高硬度和高抗拉强度,而且具备良好的耐腐蚀性,耐高温可达400℃以上,并且不导电、无磁、无氢,尤其适用于各种工程；并且新的生产工艺,加工效率高、加工成本低。(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.)

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.

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.