阅读说明：本技术 一种镀锡铜绞线生产用铜丝镀锡方法 (Tinning method for copper wire for producing tinned copper stranded wire ) 是由 陈俊胜 金月明 于 2020-07-29 设计创作，主要内容包括：本发明公开了一种镀锡铜绞线生产用铜丝镀锡方法,包括如下具体步骤：S1、利用砂纸对铜丝表面进行打磨；S2、将清洗后的铜丝放入酸洗槽中进行酸洗；S3、浸入化学镀锡液中进行表面镀锡；S4、通过收线机进行牵引收线。本发明由于铜丝表面用砂纸进行打磨,使铜丝表面粗糙,增加了锡层的附着力,使得锡层能更好地附着在铜丝表面上,通过酸洗液对铜丝清洗,有助于活化铜丝表面,可有效除去停留在铜丝表面的油污、氧化及未氧化的表面杂质,保持铜丝外部的洁净、光泽度、色牢度,便于后续镀锡,通过化学镀锡液便于和铜线表面均匀反应,保证镀锡层厚度均匀,稳定性佳,保证了镀锡铜丝的使用寿命。(The invention discloses a method for tinning a copper wire for producing a tinned copper stranded wire, which comprises the following specific steps of: s1, polishing the surface of the copper wire by using sand paper; s2, placing the cleaned copper wire into an acid washing tank for acid washing; s3, immersing the substrate in chemical tin plating solution for surface tin plating; and S4, drawing and winding up through a winding machine. According to the invention, the surface of the copper wire is polished by the sand paper, so that the surface of the copper wire is rough, the adhesive force of the tin layer is increased, the tin layer can be better attached to the surface of the copper wire, the copper wire is cleaned by the pickling solution, the surface of the copper wire is activated, oil stains, oxidized and unoxidized surface impurities staying on the surface of the copper wire can be effectively removed, the cleanness, glossiness and color fastness of the outer part of the copper wire are kept, the subsequent tin plating is facilitated, the uniform reaction with the surface of the copper wire is facilitated by the chemical tin plating solution, the uniform thickness and good stability of the tin plating layer are ensured, and the service life of.)

1. A method for tinning a copper wire for producing a tinned copper stranded wire is characterized by comprising the following specific steps of:

s1, paying off the annealed copper wire coil through an unreeling machine, and polishing the surface of the copper wire by using abrasive paper;

s2, putting the polished copper wire into a cleaning tank, cleaning the polished copper wire by hot water, putting the cleaned copper wire into a pickling tank, pickling the copper wire by using a pickling solution in the pickling tank, putting the pickled copper wire into the cleaning tank, cleaning the cleaned copper wire by using the hot water, and drying the cleaned copper wire by using a fan;

s3, immersing the air-dried copper wire into chemical tinning liquid for surface tinning, and adjusting the thickness of the tinning layer on the surface of the copper wire by controlling the tinning time and the proportion of the chemical tinning liquid;

and S4, putting the tinned copper wire into the cleaning tank again, cleaning the tinned copper wire by hot water, drying the copper wire by using a fan after cleaning, and finally drawing and winding the copper wire by using a winding machine.

2. The method for tinning the copper wire for producing the tinned copper stranded wire according to claim 1, wherein the method comprises the following steps: the sand paper in the step S1 is 60-mesh sand paper.

3. The method for tinning the copper wire for producing the tinned copper stranded wire according to claim 1, wherein the pickling solution in the S2 comprises the following components in parts by mass:

5-10 parts of sulfuric acid, 10-20 parts of potassium monopersulfate composite salt, 0.5-1 part of oxidant, 0.1-0.3 part of stabilizer, 0.4-0.8 part of corrosion inhibitor and 80-90 parts of water.

4. The method for tinning the copper wire for producing the tinned copper stranded wire according to claim 3, wherein the method comprises the following steps: the mass concentration of the sulfuric acid is 98 percent; the oxidant is one or a mixture of more of sodium bisulfate, potassium bisulfate and ammonium bisulfate; the stabilizer is one or a mixture of more of potassium persulfate, sodium persulfate, ammonium persulfate and persulfuric acid; the corrosion inhibitor is benzotriazole.

5. The method for tinning the copper wire for producing the tinned copper stranded wire according to claim 3, wherein the pickling solution is prepared by the following steps:

dividing water into three equal parts, adding sulfuric acid into 1/3 water, stirring, adding potassium monopersulfate complex salt, adding oxidant, stabilizer and corrosion inhibitor, adding the rest 2/3 water, and stirring for 20-30min to obtain pickling solution.

6. The method for tinning the copper wire for producing the tinned copper stranded wire according to claim 1, wherein the method comprises the following steps: the chemical tin plating solution in the S3 comprises the following components in parts by mass:

20-30 parts of tin salt, 3-8 parts of accelerator, 2-5 parts of wetting agent and 1-3 parts of stabilizer.

7. The method for tinning the copper wire for producing the tinned copper stranded wire according to claim 6, wherein the method comprises the following steps: the tin salt is one or a mixture of stannous sulfate, stannous methanesulfonate and stannous chloride; the promoter consists of thiourea and fluoride; the wetting agent is one or a mixture of more of polyethylene glycol, fatty alcohol-polyoxyethylene ether and alkylphenol polyoxyethylene ether; the stabilizer is one or a mixture of more of sulfuric acid, methanesulfonic acid, citric acid and tartaric acid.

8. The method for tinning the copper wire for producing the tinned copper stranded wire according to claim 6, wherein the method for preparing the chemical tinning solution comprises the following steps:

dissolving the stabilizer in deionized water, adding the accelerator, stirring for dissolving, adding the wetting agent, stirring for dissolving, finally adding the tin salt, stirring for dissolving, and fixing the volume to the required volume to obtain the chemical tin plating solution.

9. The method for tinning the copper wire for producing the tinned copper stranded wire according to claim 1, wherein the method comprises the following steps: the temperature of hot water in the cleaning tanks in S2 and S4 is 80-90 ℃.

10. The method for tinning the copper wire for producing the tinned copper stranded wire according to claim 1, wherein the method comprises the following steps: the drawing speed of the wire-rewinding machine in the S4 is 80-100m/min when the wire is drawn and rewound.

Technical Field

The invention relates to the technical field of cable production, in particular to a tinning method for a copper wire for producing a tinned copper stranded wire.

Background

The tinned copper stranded wire is prepared by drawing a copper product, tinning the drawn copper, and then twisting the tinned copper wire to compound other materials.

The tinned copper wire is an important component of the tinned copper stranded wire, the quality of the tinned copper wire directly influences the quality of the tinned copper stranded wire, a tin layer obtained by the existing copper wire tinning method is easy to fall off due to poor adhesive force with the copper wire, the service life of the tinned copper stranded wire is seriously influenced, and due to oil stains, oxidation and unoxidized surface impurities on the surface of the copper wire, a tinning solution and the surface of the copper wire cannot uniformly react, so that the thickness of the tinned layer is uneven, and the stability is poor.

Disclosure of Invention

The invention aims to provide a method for tinning a copper wire for producing a tinned copper stranded wire, wherein the surface of the copper wire is polished by abrasive paper, so that the surface of the copper wire is rough, the adhesive force of a tin layer is increased, the tin layer can be better attached to the surface of the copper wire, the copper wire is cleaned by a pickling solution, the surface of the copper wire is facilitated to be activated, oil stains, oxidized and unoxidized surface impurities remained on the surface of the copper wire can be effectively removed, the cleanness, glossiness and color fastness of the outer part of the copper wire are kept, subsequent tinning is facilitated, the chemical tinning solution is convenient to uniformly react with the surface of the copper wire, the uniform thickness and good stability of the tinned copper wire are ensured, the service life of the tinned copper wire is ensured, and the.

In order to achieve the purpose, the invention provides the following technical scheme:

a method for tinning a copper wire for producing a tinned copper stranded wire comprises the following specific steps:

s1, paying off the annealed copper wire coil through an unreeling machine, and polishing the surface of the copper wire by using abrasive paper;

s2, putting the polished copper wire into a cleaning tank, cleaning the polished copper wire by hot water, putting the cleaned copper wire into a pickling tank, pickling the copper wire by using a pickling solution in the pickling tank, putting the pickled copper wire into the cleaning tank, cleaning the cleaned copper wire by using the hot water, and drying the cleaned copper wire by using a fan;

s3, immersing the air-dried copper wire into chemical tinning liquid for surface tinning, and adjusting the thickness of the tinning layer on the surface of the copper wire by controlling the tinning time and the proportion of the chemical tinning liquid;

and S4, putting the tinned copper wire into the cleaning tank again, cleaning the tinned copper wire by hot water, drying the copper wire by using a fan after cleaning, and finally drawing and winding the copper wire by using a winding machine.

Preferably, the sandpaper in S1 is 60-mesh sandpaper.

Preferably, the pickling solution in S2 comprises the following components by mass:

5-10 parts of sulfuric acid, 10-20 parts of potassium monopersulfate composite salt, 0.5-1 part of oxidant, 0.1-0.3 part of stabilizer, 0.4-0.8 part of corrosion inhibitor and 80-90 parts of water.

Preferably, the mass concentration of the sulfuric acid is 98%; the oxidant is one or a mixture of more of sodium bisulfate, potassium bisulfate and ammonium bisulfate; the stabilizer is one or a mixture of more of potassium persulfate, sodium persulfate, ammonium persulfate and persulfuric acid; the corrosion inhibitor is benzotriazole.

Preferably, the preparation method of the pickling solution comprises the following steps:

dividing water into three equal parts, adding sulfuric acid into 1/3 water, stirring, adding potassium monopersulfate complex salt, adding oxidant, stabilizer and corrosion inhibitor, adding the rest 2/3 water, and stirring for 20-30min to obtain pickling solution.

Preferably, the chemical tin plating solution in S3 has the following formula by mass:

20-30 parts of tin salt, 3-8 parts of accelerator, 2-5 parts of wetting agent and 1-3 parts of stabilizer.

Preferably, the tin salt is one or a mixture of stannous sulfate, stannous methanesulfonate and stannous chloride; the promoter consists of thiourea and fluoride; the wetting agent is one or a mixture of more of polyethylene glycol, fatty alcohol-polyoxyethylene ether and alkylphenol polyoxyethylene ether; the stabilizer is one or a mixture of more of sulfuric acid, methanesulfonic acid, citric acid and tartaric acid.

Preferably, the preparation method of the electroless tin plating solution comprises the following steps:

dissolving the stabilizer in deionized water, adding the accelerator, stirring for dissolving, adding the wetting agent, stirring for dissolving, finally adding the tin salt, stirring for dissolving, and fixing the volume to the required volume to obtain the chemical tin plating solution.

Preferably, the temperature of the hot water in the cleaning tanks in S2 and S4 is 80-90 ℃.

Preferably, the traction speed of the wire rewinding machine in the S4 is 80-100m/min during traction wire rewinding.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the surface of the copper wire is polished by the sand paper, so that the surface of the copper wire is rough, the adhesive force of the tin layer is increased, the tin layer can be better attached to the surface of the copper wire, the copper wire is cleaned by the pickling solution, the surface of the copper wire is activated, oil stains, oxidized and unoxidized surface impurities staying on the surface of the copper wire can be effectively removed, the cleanness, glossiness and color fastness of the outer part of the copper wire are kept, the subsequent tin plating is facilitated, the uniform reaction with the surface of the copper wire is facilitated by the chemical tin plating solution, the uniform thickness and good stability of the tin plating layer are ensured, and the service life of.

Drawings

Fig. 1 is a schematic flow chart of a method for tinning a copper wire for producing a tinned copper stranded wire.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following 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.