Nickel-plated steel strip lead machining method

Abstract

The invention relates to the technical field of electronic component manufacturing, and discloses a nickel-plated steel strip lead processing method which comprises the following steps: S1, steel strip oil removal treatment: selecting a steel strip with the width specification of 50mm, adopting an alkaline oil removal agent, and continuously performing electrolytic oil removal through a cathode and anode electrolysis method; s2, activating the steel strip: removing an oxide layer on the surface of the steel strip by using a sulfuric acid solution, and then washing the steel strip by using clear water; s3, electroplating a nickel layer: immersing the steel strip in a nickel sulfate electroplating solution, circularly stirring the electroplating solution, and uniformly depositing nickel ions on the surface of the steel strip by adopting a pulse electroplating technology to form the nickel layer; s4, slitting: cleaning and drying the nickel-plated steel strip lead and then slitting the nickel-plated steel strip lead; and S5, vacuum packaging. Through the optimized steel strip surface oil removal and activation treatment process, oil stains and oxide layers on the surface of the steel strip can be effectively removed, the activity of the surface of the steel strip is improved, and therefore the effects of enhancing the binding force between a plating layer and the steel strip and improving the plating layer quality are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of electronic component manufacturing, in particular to a method for processing nickel-plated steel strip leads. Background Art

[0002] With the rapid development of electronic technology, the performance requirements of electronic components are increasing day by day. As a key connecting component in electronic components, the quality and performance of nickel-plated steel strip leads directly affect the stability and reliability of electronic equipment. There are many problems with the traditional nickel-plated steel strip lead processing method. On the one hand, the uniformity of the coating is difficult to ensure, and local thickness inconsistency is prone to occur, which will lead to unstable conductivity of the lead. On the other hand, the bonding force between the coating and the steel strip is not strong, and the coating may fall off during use, affecting the service life of electronic components.

[0003] In the current technology, the production efficiency of traditional processing methods is low and it is difficult to meet the needs of large-scale industrial production. Therefore, it is of great practical significance to develop a new nickel-plated steel strip lead processing method. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method for processing nickel-plated steel strip leads to solve the problems of poor coating quality and low production efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A method for processing nickel-plated steel strip leads, comprising the following steps:

[0006] S1. Steel strip degreasing treatment: Select a steel strip with a width of 50 mm, use an alkaline degreasing agent, and then continuously perform electrolytic degreasing through the method of cation and anode electrolysis;

[0007] S2. Activation treatment of steel strip: Use sulfuric acid solution to remove the oxide layer on the surface of the steel strip, and then rinse it with clean water;

[0008] S3, nickel electroplating layer: immerse the steel strip in a nickel sulfate electroplating solution, circulate and stir the electroplating solution, and use pulse electroplating technology to uniformly deposit nickel ions on the surface of the steel strip to form a nickel plating layer to obtain a nickel-plated steel strip lead;

[0009] S4, cutting: cleaning and drying the nickel-plated steel strip lead wires before cutting, and cutting multiple conductive connection leads at the same time;

[0010] S5. Vacuum packaging: Use a vacuum packaging machine to vacuum package the cut nickel-plated steel strip leads.

[0011] Preferably, the treatment alkali concentration of the alkaline degreasing agent in S1 is 20-50 g / L, the current is 100-150 A, the speed is 5-10 m / min, and the temperature is 45-60°C.

[0012] Preferably, the sulfuric acid concentration in the sulfuric acid solution in S2 is 10%, and the pickling time is 1-3 minutes.

[0013] Preferably, the concentration of the nickel sulfate electroplating solution in S3 includes a main salt concentration of 70-110 g / L, a chloride ion concentration of 10-18 g / L, and a boric acid concentration of 35-45 g / L.

[0014] Preferably, the current density of the pulse electroplating in S3 is 3Ah / dm2, the operating speed is 5-10 meters per minute, the pulse frequency is 500Hz, and the electroplating temperature is controlled at 35-45°C, and the electroplating time is 5-10 minutes.

[0015] Preferably, the cutting width of the conductive connecting wire in S6 is 2-5 mm.

[0016] The present invention provides a method for processing nickel-plated steel strip leads. It has the following beneficial effects:

[0017] 1. The present invention can effectively remove the oil stains and oxide layer on the surface of the steel strip and improve the activity of the steel strip surface through the optimized steel strip surface degreasing and activation treatment process, thereby achieving the effect of enhancing the bonding force between the coating and the steel strip and improving the quality of the coating.

[0018] 2. The present invention adopts pulse electroplating technology and precise process parameter control to form a nickel plating layer with uniform thickness, dense structure and good bonding force on the surface of the steel strip, thereby giving the steel strip lead excellent anti-oxidation, welding performance and good electrical conductivity, meeting the stability effect of its use in different application scenarios.

[0019] 3. The present invention further improves the quality and corrosion resistance of the coating by controlling the heating temperature during the electroplating process, thereby extending the service life of the nickel-plated steel strip lead.

[0020] 4. The entire nickel-plated steel strip lead processing method of the present invention has a reasonable process, strong operability, can significantly improve production efficiency, and is suitable for large-scale industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a flow chart of a method for processing nickel-plated steel strip leads. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Please see attached Figure 1 The embodiment of the present invention provides a method for processing a nickel-plated steel strip lead, comprising the following steps:

[0024] S1. Steel strip degreasing treatment: Select a steel strip with a width of 50 mm, use an alkaline degreasing agent, and then continuously perform electrolytic degreasing through the method of cation and anode electrolysis;

[0025] S2. Activation treatment of steel strip: Use sulfuric acid solution to remove the oxide layer on the surface of the steel strip, and then rinse it with clean water;

[0026] S3, nickel electroplating layer: immerse the steel strip in a nickel sulfate electroplating solution, circulate and stir the electroplating solution, and use pulse electroplating technology to uniformly deposit nickel ions on the surface of the steel strip to form a nickel plating layer to obtain a nickel-plated steel strip lead;

[0027] S4, cutting: cleaning and drying the nickel-plated steel strip lead wires before cutting, and cutting multiple conductive connection leads at the same time;

[0028] S5. Vacuum packaging: Use a vacuum packaging machine to vacuum package the cut nickel-plated steel strip leads.

[0029] Specifically, in S1, alkaline degreasing agent is selected and electrolytic degreasing is performed by continuous cathode and anode electrolysis, which can completely remove the oil stains on the surface of the steel strip, effectively break the adhesion of the oil stains on the surface of the steel strip, decompose and detach the oil stains, significantly improve the cleanliness of the surface of the steel strip, ensure no residual oil stains, create pure surface conditions for subsequent activation treatment and electroplating nickel layer, and prevent the oil stains from affecting the quality and bonding strength of the coating during the subsequent electroplating process;

[0030] In S2, sulfuric acid solution is used to treat the steel strip, which can effectively dissolve and remove the oxide layer formed on the surface of the steel strip, thereby fully exposing the fresh metal surface of the steel strip, improving its surface activity, and making the surface of the steel strip more conducive to the attachment and growth of the subsequent electroplated nickel layer, ensuring the bonding strength between the coating and the steel strip, as well as the uniformity, density and overall quality of the coating, laying the foundation for obtaining high-quality nickel-plated steel strip leads;

[0031] In S3, the steel strip is immersed in a nickel sulfate electroplating solution and stirred to create a suitable electroplating environment, promote the migration and reaction of nickel ions on the surface of the steel strip, and then stirred to ensure the uniform composition of the electroplating solution. Then, the pulse electroplating technology can accurately control the current to make the nickel ions deposit more orderly and uniformly, forming a nickel plating layer with uniform thickness, dense structure and good bonding force on the surface of the steel strip, thereby giving the steel strip lead excellent anti-oxidation, welding performance and good conductivity, meeting its stability in different electronic component application scenarios;

[0032] In S4, the nickel-plated steel strip lead is cleaned and dried before being cut to ensure the dryness of the nickel-plated steel strip lead after packaging, to avoid oxidation, and to remove impurities that may remain on the steel strip lead. The nickel-plated steel strip is then cut into conductive connecting wires of a specific width as required to meet the requirements of different products for the width of the connecting wires. At the same time, the method of cutting multiple wires at a time greatly improves production efficiency, replaces pure nickel wires, and is used for battery tab lead wires.

[0033] In S5, a vacuum packaging machine is used to process the nickel-plated steel strip leads after slitting, which effectively prevents the nickel-plated steel strip leads from oxidizing due to contact with oxygen during storage and transportation, thereby maintaining the quality and performance of the coating, extending the shelf life of the product, and ensuring that the product still has good antioxidant and electrical conductivity properties when in use. It also helps prevent external dust, moisture, etc. from polluting and damaging the product.

[0034] The treatment alkali concentration of the alkaline degreasing agent in S1 is 20-50g / L, the current is 100-150A, the speed is 5-10 meters per minute, and the temperature is 45-60°C.

[0035] Specifically, the setting of alkali concentration helps to provide a sufficient alkaline environment so that the oil stains can undergo saponification reaction under chemical action, making them easier to remove; the electric current can enhance the electrolytic effect, prompting the oil stains on the surface of the steel strip to quickly decompose and detach; controlling the running speed of the steel strip through the degreaser during the degreasing process can ensure that the steel strip stays in the degreaser for an appropriate time, which can fully remove the oil while avoiding excessive treatment; finally, the degreasing temperature can increase the activity and chemical reaction rate of the degreaser and enhance the degreasing effect.

[0036] The sulfuric acid concentration in the sulfuric acid solution in S2 is 10%, and the pickling time is 1-3 minutes.

[0037] Specifically, the strong acidity of sulfuric acid is used to remove the oxide layer on the surface of the steel strip, so that the metal atoms on the surface are fully exposed, the activity of the steel strip surface is enhanced, and a clean and highly active surface is provided for the subsequent electroplated nickel layer, which is conducive to the uniform deposition and firm bonding of nickel ions on the surface of the steel strip, thereby improving the quality and performance of the coating.

[0038] The concentration of the nickel sulfate electroplating solution in S3 includes a main salt concentration of 70-110 g / L, a chloride ion concentration of 10-18 g / L, and a boric acid concentration of 35-45 g / L.

[0039] Specifically, the main salt can provide sufficient nickel ions to ensure that enough nickel is deposited on the surface of the steel strip during the electroplating process to form a nickel coating of required thickness and performance. Chloride ions can improve the conductivity of the plating solution, promote the migration and deposition of nickel ions, and make the coating more uniform and dense. Boric acid is used to stabilize the pH value of the plating solution to prevent large fluctuations in the pH value of the plating solution during the electroplating process, thereby ensuring the stability of the electroplating process and the quality of the coating.

[0040] The current density of pulse plating in S3 is 3Ah / dm2, the running speed is 5-10 meters per minute, the pulse frequency is 500Hz, and the plating temperature is controlled at 35-45°C, and the plating time is 5-10 minutes.

[0041] Specifically, the current density is 3Ah / dm 2 Its function is to control the deposition rate of nickel ions and ensure that the growth rate of the coating is moderate, neither too fast to cause rough coating, nor too slow to affect production efficiency. Then, the running speed is controlled to ensure that the steel strip moves evenly and stably in the electroplating solution, so that the coating remains uniform along the length of the steel strip. Heating at 35-45°C during the electroplating process can further improve the quality and corrosion resistance of the coating and extend the service life of the nickel-plated steel strip lead.

[0042] The slitting width of the conductive connecting wire in S6 is 2-5mm.

[0043] Specifically, the conductive connecting wires are cut into any width of 2-5 mm, and the obtained nickel-plated steel strip leads meet the specific requirements of different application scenarios for the width of the conductive connecting wires.

[0044] Embodiment 1

[0045] S1: Select a steel strip with a width of 50 mm and place it in an alkaline degreasing agent solution with a temperature of 50°C and an alkali concentration of 20 g / L for electrolytic degreasing treatment. The current is 100 A and the speed is 5 m / min.

[0046] S2: After rinsing with clean water, the steel strip is placed in a 10% sulfuric acid solution for pickling for 1 minute to remove the oxide layer, and then rinsed again;

[0047] S3: Prepare the plating solution with a main salt concentration of 70g / L, a chloride ion concentration of 10g / L, and a boric acid concentration of 35g / L. Control the plating solution temperature to 40°C, use pulse plating, and a current density of 3A / dm 2 , the running speed is 5 meters per minute, the pulse frequency is 500Hz, and the electroplating time is 5 minutes;

[0048] S4: The electroplated substrate is 50mm wide, and then cut into 2mm wide conductive connecting wires. Multiple wires can be cut at the same time;

[0049] S5: Use vacuum packaging machine to carry out vacuum packaging to achieve the effect of complete isolation from the air.

[0050] The nickel-plated steel strip leads obtained through the above-mentioned embodiment have good coating uniformity after testing, and the bonding strength between the coating and the steel strip reaches more than 650N / mm. The corrosion resistance and oxidation resistance are also significantly improved, which meets the high quality requirements of electronic components for nickel-plated steel strip leads.

[0051] Embodiment 2

[0052] S1: Select a steel strip with a width of 50 mm and place it in an alkaline degreasing agent solution with a temperature of 50°C and an alkali concentration of 30 g / L for electrolytic degreasing treatment. The current is 120 A and the speed is 7 meters per minute.

[0053] S2: After rinsing with clean water, the steel strip is placed in a 10% sulfuric acid solution for pickling for 2 minutes to remove the oxide layer, and then rinsed again;

[0054] S3: Prepare the plating solution with a main salt concentration of 90g / L, a chloride ion concentration of 15g / L, and a boric acid concentration of 40g / L. Control the plating solution temperature to 45°C, use pulse plating, and a current density of 3A / dm 2 , the running speed is 5 meters per minute, the pulse frequency is 500Hz, and the electroplating time is 8 minutes;

[0055] S4: The electroplated substrate is 50mm wide, and then cut into 4mm wide conductive connecting wires. Multiple wires can be cut at the same time;

[0056] S5: Use vacuum packaging machine to carry out vacuum packaging to achieve the effect of complete isolation from the air.

[0057] The nickel-plated steel strip leads obtained through the above-mentioned embodiment have good coating uniformity after testing, and the bonding strength between the coating and the steel strip reaches more than 650N / mm. The corrosion resistance and oxidation resistance are also significantly improved, which meets the high quality requirements of electronic components for nickel-plated steel strip leads.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for processing nickel-plated steel strip leads, characterized in that: The following steps are involved: S1. Steel strip degreasing treatment: Select a steel strip with a width of 50 mm, use an alkaline degreasing agent, and then continuously perform electrolytic degreasing through the method of cation and anode electrolysis; S2. Activation treatment of steel strip: Use sulfuric acid solution to remove the oxide layer on the surface of the steel strip, and then rinse it with clean water; S3, nickel electroplating layer: immerse the steel strip in a nickel sulfate electroplating solution, circulate and stir the electroplating solution, and use pulse electroplating technology to uniformly deposit nickel ions on the surface of the steel strip to form a nickel plating layer to obtain a nickel-plated steel strip lead; S4, cutting: cleaning and drying the nickel-plated steel strip lead wires before cutting, and cutting multiple conductive connection leads at the same time; S5. Vacuum packaging: Use a vacuum packaging machine to vacuum package the cut nickel-plated steel strip leads.

2. A method for processing nickel-plated steel strip leads according to claim 1, characterized in that: The alkaline degreasing agent in S1 has a treatment alkali concentration of 20-50 g / L, a current of 100-150 A, a speed of 5-10 m / min, and a temperature of 45-60° C.

3. A method for processing nickel-plated steel strip leads according to claim 1, characterized in that: The sulfuric acid concentration in the sulfuric acid solution in S2 is 10%, and the pickling time is 1-3 minutes.

4. A method for processing nickel-plated steel strip leads according to claim 1, characterized in that: The nickel sulfate electroplating solution concentration in S3 includes a main salt concentration of 70-110 g / L, a chloride ion concentration of 10-18 g / L, and a boric acid concentration of 35-45 g / L.

5. A method for processing nickel-plated steel strip leads according to claim 1, characterized in that: The current density of the pulse electroplating in S3 is 3Ah / dm2, the running speed is 5-10 meters per minute, the pulse frequency is 500Hz, and the electroplating temperature is controlled at 35-45°C, and the electroplating time is 5-10 minutes.

6. A method for processing nickel-plated steel strip leads according to claim 1, characterized in that: The cutting width of the conductive connecting wire in S6 is 2-5 mm.

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