Low-carbon, environment-friendly and efficient process for removing burrs of precise nickel-based conductor material for electronic industry

Abstract

The invention belongs to the technical field of preparation of precise nickel-based conductor materials for the electronic industry, and discloses a low-carbon, environment-friendly and efficient process for removing burrs of precise nickel-based conductor materials for the electronic industry, and the process specifically comprises the following steps: washing and grinding coarse-particle white corundum water, washing and grinding fine-particle white corundum water, cleaning white corundum powder on the surface of a conductor material, and drying. The low-carbon environment-friendly high-efficiency cleaning precision nickel-based conductor material for the electronic industry is good in surface quality, high in product percent of pass, low in cost, free of environmental pollution and wide in application prospect.

Description

Technical Field

[0001] The present invention belongs to the technical field of preparing high-quality precision nickel-based conductor materials for the electronics industry, and relates to a low-carbon, environmentally friendly, and efficient process for removing burrs from precision nickel-based conductor materials to improve product quality and performance. Background Art

[0002] Precision nickel-based conductor materials are corrosion-resistant, well-shaped, and have excellent thermal and electrical conductivity. They are widely used in electronics, new energy batteries, and other fields. With the rapid development of industries such as mobile phones, new energy batteries, and robotics, the application areas of precision nickel-based conductor materials are constantly expanding, and demand is increasing. Due to the large volume of demand in the electronics industry, the quantity of each size and specification of precision nickel-based conductor materials is mostly measured in tens of thousands, or even hundreds of thousands or millions. However, after the precision nickel-based conductor materials are stamped, some burrs will appear on the edges of the conductor materials. Burrs in conductor materials refer to tiny protrusions or spikes formed on the edge or surface of the stamped workpiece due to plastic deformation of the material and shearing action of the die during the stamping process. These burrs are usually small, sharp protrusions that appear mostly on the edges, holes, or shear surfaces of the conductor material. Burrs are characterized by their tiny size, but are large enough to affect the performance of the workpiece and product quality.

[0003] Burrs on precision nickel-based conductor materials have a variety of adverse effects on product quality and performance, including causing dimensional deviations in the conductor material, affecting assembly accuracy; making the surface of the conductor material rough, affecting appearance and subsequent processing; burrs will hinder the assembly of stamped parts and increase friction and wear; in addition, burrs on precision nickel-based conductor materials will affect the conductivity of the product, resulting in poor contact or short circuits.

[0004] Currently, measures to address burrs in precision nickel-based conductor materials primarily include adjusting stamping parameters and improving stamping die design. Furthermore, mechanical, chemical, or electrolytic methods are used to remove burrs from precision nickel-based conductor materials. Finally, product quality testing is strengthened to ensure that burrs on conductor materials remain within acceptable limits. However, optimizing die design only partially addresses this issue. Due to high production volumes, die wear, uneven clearances, or blunted cutting edges in dies with tight dimensional tolerances over extended use increase the likelihood of burrs, leading to the appearance of burrs in batches of finished products. Chemical and electrolytic methods for burr removal also present complex processes and environmental pollution. A search of public literature and domestic patents using software revealed devices that remove burrs by frictionally driving the rotation of components. These devices are energy-intensive, prone to contamination, and unsuitable for components with blind spots. Therefore, developing a low-carbon, environmentally friendly, and efficient method for removing burrs from precision nickel-based conductor materials is crucial for ensuring product quality and improving the yield rate. Summary of the Invention

[0005] The purpose of this invention is to provide a low-carbon, environmentally friendly, and efficient process for deburring precision nickel-based conductor materials. This process overcomes the problems of heavy workload, high labor intensity, environmental pollution, and product quality issues associated with deburring precision nickel-based conductor materials used in the electronics and new energy battery fields.

[0006] The object of the present invention is achieved in the following ways: A low-carbon, environmentally friendly and efficient process for removing burrs from precision nickel-based conductor materials, the process comprising the following steps: (1) Coarse-grained white corundum water scouring grinding: put the precision nickel-based conductor material into the grinding equipment, add water to the grinding tank in the grinding equipment until the precision nickel-based conductor material is immersed, start the equipment, and the water containing the added white corundum coarse powder flows into the grinding tank at a high speed from the scouring nozzle in the middle of the grinding tank of the grinding equipment; the water pressure is 200bar-400bar, and the abrasive concentration (i.e. the content of white corundum powder in the water) is 10%-20wt%; after grinding for 10min-15min, the grinding water flow direction is changed from clockwise to counterclockwise, and the grinding is alternately circulated. The total grinding time is 2h-4h; then take out the precision nickel-based conductor material and put it into the white corundum fine-grain grinding equipment; the above-mentioned abrasive concentration will affect the grinding efficiency. Too high abrasive concentration may cause equipment wear, and too low abrasive concentration will reduce the grinding efficiency. (2) Water scouring grinding of fine-grained white corundum: the water pressure is 300 bar-400 bar, the abrasive concentration (i.e. the content of white corundum powder in water) is 15 wt%-20 wt%, and after grinding for 10 min-15 min, the grinding water flow direction is changed from clockwise to counterclockwise, and the grinding is alternately circulated. The total grinding time is 3 h-4 h; (3) After the burr grinding effect of the precision nickel-based conductor material is tested to be qualified, the white corundum powder on the surface of the conductor material is cleaned and dried.

[0007] Preferably, the grinding equipment described in step (1) is equipped with a flushing device; the grinding tank of the grinding equipment is an annular grinding tank, which is conducive to rotary flushing. At the same time, the water pressure and water flow direction are adjustable to facilitate improving grinding efficiency. The flushing nozzle is located in the middle of the annular grinding tank of the equipment. Under the impact of the water flow, the precision nickel-based conductor material and the coarse white corundum particles carried by the high-speed water flow rub against each other, achieving the effect of fully grinding without dead angles and removing burrs.

[0008] Preferably, the particle size of the white corundum coarse powder in step (1) is in the range of 400 mesh to 500 mesh, preferably 400 mesh to 430 mesh.

[0009] Preferably, the particle size range of the white corundum fine powder in step (2) is 600 mesh to 800 mesh.

[0010] Preferably, the abrasive concentration in step (1) is 20 wt %, and the abrasive concentration in step (2) is 20 wt %.

[0011] Preferably, the water spraying angle in step (1) is 30°-60°, and the water spraying angle in step (2) is 30°-50°.

[0012] If the water pressure in step (2) is too high, the precision nickel-based conductor material will flow along with the water flow, and the friction between them will be small; if the water pressure is too low, the production efficiency will be low.

[0013] The white corundum powder has a purity of ≥99% and a Mohs hardness of ≥9. It is free of oil stains and other impurities.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) Conventional electrolytic polishing and chemical etching polishing have a significant impact on the environment. The present invention adopts a specific water scouring and grinding process to remove burrs from precision nickel-based conductor materials, which not only avoids environmental pollution but also further improves production efficiency. It can quickly remove burrs on the surface of precision nickel-based conductor materials, and the surface of the conductor material is smooth after treatment, further improving product quality. In addition, the white corundum abrasive can be recycled and reused, reducing production costs.

[0015] (2) The present invention adopts a special grinding medium technology and selects specific white corundum powder as the grinding medium, which has the advantages of high hardness, high wear resistance, good chemical stability, high fineness, uniform particle size distribution, and renewability. It can effectively eliminate the problems on the surface of precision nickel-based conductor materials and improve the product qualification rate.

[0016] (3) The process of the present invention has wide adaptability and is suitable for precision nickel-based conductor materials of various shapes and sizes.

[0017] The grinding equipment used in the present invention is water-washing sand grinding and finishing equipment HXZD-400L, which is a general equipment.

[0018] Therefore, the method for eliminating burrs of precision nickel-based conductor materials used in the fields of electronics and new energy batteries proposed in the present invention improves the surface quality of precision nickel-based conductor materials and effectively solves the new energy problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the water sandblasting, grinding and finishing equipment used in the embodiment of the present invention.

[0020] Figure 2 The conductor material before and after burr removal; (a) is the conductor material before burr removal, and (b) is the conductor material after burr removal.

[0021] Figure 3 This is the conductor material after burrs are removed in Comparative Example 1.

[0022] Figure 4This is the conductor material after burrs are removed in Comparative Example 2. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Instead, these embodiments are provided to make the present invention more thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0024] The precision nickel-based conductor materials described in the following examples were sourced from Jiangsu Jintai Precision Technology Co., Ltd., including grades 1J79, 1J85, and metallic nickel. White corundum powder was purchased directly from the market, with a required purity greater than 99.5%. The coarse white corundum powder had a particle size range of 400-430 mesh, while the fine white corundum powder had a particle size range of 600-800 mesh. The grinding equipment used was a 400L water-jet sandblasting and polishing machine, the HXZD-400L, manufactured by Suzhou Hongdexin Vibration Polishing Machine Co., Ltd. Example 1

[0025] (1) The purity of the white corundum powder used for water washing and grinding is 99.6%, the Mohs hardness is 9.2, and it is free of oil and other impurities. Among them, the particle size range of the white corundum coarse powder is 400-430 mesh; the particle size range of the fine powder is required to be 600-650 mesh; the grinding tank is an annular grinding tank; the precision nickel-based conductor material is placed in the water washing coarse particle white corundum grinding equipment, a small amount of water is added, and then the device is started. The water with the white corundum coarse powder added flows into the grinding equipment at high speed from the nozzle. Under the impact of the water flow, the precision nickel-based conductor material and the white corundum powder particles carried by the high-speed water flow are ground. The water pressure is 200 bar, the spray angle is 60°, and the abrasive concentration (the content of white corundum powder in the water) is 20 wt%. Grind for 15 minutes, then change the grinding water flow direction from clockwise to counterclockwise, and alternately grind in a cycle. The total grinding time is 4 hours.

[0026] (2) Then take out the precision nickel-based conductor material and put it into the white corundum fine particle grinding equipment; the water pressure is 400 bar, the spray angle is 50°, the abrasive concentration (the content of white corundum powder in water) is 20 wt%, and the grinding is carried out for 15 minutes. Then the grinding water flow direction is changed from clockwise to counterclockwise, and the grinding is repeated in an alternating cycle. The total grinding time is 4 hours; (3) Clean the white corundum powder on the surface of the precision nickel-based conductor material and dry it; sample 6 pieces of the dried precision nickel-based conductor material for surface quality inspection. After the burrs are free and the surface quality is qualified, they are packaged and put into storage. Figure 2 ( Figure 2 (a) Photo of the effect before cleaning, Figure 2 (b) Photo of the effect after cleaning) Example 2

[0027] (1) The purity of the white corundum powder used for water scouring and grinding is 99.8%, the Mohs hardness is 9.6, and it is free of oil and other impurities. Among them, the particle size range of the white corundum coarse powder is 460-500 mesh; the particle size range of the fine powder is required to be 700-800 mesh; the grinding groove is an annular grinding groove, which is conducive to rotary scouring; the precision nickel-based conductor material is placed in the water scouring coarse particle white corundum grinding equipment, a small amount of water is added, and then the device is started. The water with the white corundum coarse powder added flows into the grinding equipment at high speed from the nozzle. Under the impact of the water flow, the precision nickel-based conductor material and the white corundum powder particles carried by the high-speed water flow are ground. The water pressure is 400 bar, the spray angle is 30°, and the abrasive concentration (the content of white corundum powder in the water) is 10 wt%. Grind for 10 minutes, and then change the grinding water flow direction from clockwise to counterclockwise, and alternately grind in a cycle. The total grinding time is 2 hours.

[0028] (2) Then take out the precision nickel-based conductor material and put it into the white corundum fine particle grinding equipment; the water pressure is 300 bar, the spray angle is 30°, the abrasive concentration (the content of white corundum powder in water) is 15 wt%, and the grinding is carried out for 10 minutes. Then the grinding water flow direction is changed from clockwise to counterclockwise, and the grinding is repeated in an alternating cycle. The total grinding time is 3 hours; (3) Clean the white corundum powder on the surface of the precision nickel-based conductor material and dry it; sample 6 pieces of the dried precision nickel-based conductor material for surface quality inspection, and pack and store them after they are free of burrs and have qualified surface quality. Comparative Example 1

[0029] Only white corundum coarse powder was used for water washing and grinding. The particle size range of the white corundum coarse powder was 400-430 mesh. The total grinding time was 5 h. The remaining steps and conditions were the same as steps (1) and (3) of Example 1.

[0030] After polishing, some corners of the precision nickel-based conductor material still have burrs that have not been completely removed. Figure 3 . Comparative Example 2

[0031] Only white corundum fine powder was used for water washing and grinding. The particle size range of the white corundum fine powder was 600-800 mesh. The total grinding time was 5 h. The remaining steps and conditions were the same as steps (2) and (3) of Example 1.

[0032] After polishing, some corners of the precision nickel-based conductor material still have many burrs. Figure 4 .

Claims

1. A low-carbon, environmentally friendly and efficient process for removing burrs from precision nickel-based conductor materials, characterized in that The process includes the following steps: (1) Coarse-grained white corundum water scouring grinding: put the precision nickel-based conductor material into the grinding equipment, add water to the grinding tank of the grinding equipment until the precision nickel-based conductor material is immersed, start the equipment, and the water containing the white corundum coarse powder flows into the grinding tank at a high speed from the scouring nozzle in the middle of the grinding tank; the water pressure is 200bar-400bar, and the abrasive concentration is 10%-20wt%; after grinding for 10min-15min, the grinding water flow direction is changed from clockwise to counterclockwise, and the grinding is alternately circulated. The total grinding time is 2h-4h; then take out the precision nickel-based conductor material and put it into the white corundum fine-grain grinding equipment; (2) Fine-grained white corundum water scouring grinding: water pressure is 300bar-400bar, abrasive concentration is 15%-20wt%, after grinding for 10min-15min, the grinding water flow direction is changed from clockwise to counterclockwise, alternating cycle grinding, the total grinding time is 3h-4h; (3) After the burr grinding effect of the precision nickel-based conductor material is tested to be qualified, the white corundum powder on the surface of the conductor material is cleaned and dried.

2. The low-carbon, environmentally friendly and efficient process for removing burrs from precision nickel-based conductor materials according to claim 1 is characterized in that The particle size of the white corundum coarse powder in step (1) is in the range of 400 mesh to 500 mesh.

3. The low-carbon, environmentally friendly and efficient process for removing burrs from precision nickel-based conductor materials according to claim 2 is characterized in that The particle size of the white corundum coarse powder in step (1) is in the range of 400 mesh to 430 mesh.

4. The low-carbon, environmentally friendly and efficient process for removing burrs from precision nickel-based conductor materials according to claim 1 is characterized in that The abrasive concentration in step (1) is 20 wt %.

5. The low-carbon, environmentally friendly and efficient process for removing burrs from precision nickel-based conductor materials according to claim 1 is characterized in that The abrasive concentration in step (2) is 20 wt %.

6. The low-carbon, environmentally friendly and efficient process for removing burrs from precision nickel-based conductor materials according to claim 1 is characterized in that The particle size range of the fine-grained white corundum in step (2) is 600-800 mesh.

7. The low-carbon, environmentally friendly and efficient process for removing burrs from precision nickel-based conductor materials according to claim 1 is characterized in that In the step (1), the water spraying angle is 30°-60°.

8. The low-carbon, environmentally friendly and efficient process for removing burrs from precision nickel-based conductor materials according to claim 1 is characterized in that The spraying angle in step (2) is 30°-50°.

9. The low-carbon, environmentally friendly and efficient process for removing burrs from precision nickel-based conductor materials according to claim 1 is characterized in that The grinding groove of the grinding equipment is an annular grinding groove.

10. The low-carbon, environmentally friendly and efficient process for removing burrs from precision nickel-based conductor materials according to claim 1 is characterized in that The purity of the white corundum powder is ≥99wt%, and the Mohs hardness is ≥9.

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