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Method for ultrasonic electroplating of diamond drilling bit

An electroplating diamond and ultrasonic technology, applied in jewelry and other fields, can solve problems such as small current density range, reduced coating density, and unsatisfactory drill quality, so as to improve the strength of bezel setting, improve performance and quality, and reduce abnormal shedding. Effect

Inactive Publication Date: 2007-05-16
CHINA UNIV OF GEOSCIENCES (WUHAN)
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AI Technical Summary

Problems solved by technology

The main disadvantages of this conventional method are: the increase of the current density is limited due to cathode polarization and concentration polarization, so the allowable current density range is small, so the production cycle is long; at the same time, due to the hydrogen evolution effect of the cathode, the brittleness of the coating is large , and bubbles remain in the coating to reduce the density of the coating, the stress of the coating is large, and the quality of the drill bit is not ideal

Method used

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with embodiment.

[0017] The present invention is a new method of ultrasonic electroplating diamond drill bits: applying ultrasonic enhanced electroplating in the conventional process of electroplating diamond drill bits, and adopting the following electroplating solution and electroplating process.

[0018] (1) Plating solution formula (unit is g / L): nickel sulfate 220-300, cobalt sulfate 15-25, boric acid 30-40, sodium chloride 15-20. Note: That is 220-300 grams of nickel sulfate in 1 liter of plating solution.

[0019] (2) Electroplating process: the temperature of the electroplating solution is 30-45°C, the pH value of the electroplating solution is 3.8-4.8, and the current density is 4-10A / dm 2 .

[0020] The present invention applies ultrasonic waves with a certain frequency and unit power in a certain way during the thickened composite plating process, increases the plating speed and improves...

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Abstract

The invention discloses a plating method of diamond driller through ultrasound, which is characterized by the following: exerting ultrasound in the plating course; adopting putting vibrating exchanger with bottom vibration pattern, lateral vibrating pattern and top vibrating pattern; setting the frequency scale of ultrasound at 20-50KHz and unit power factor scale at 0.5-2W / cm2; adopting the following plating liquid with 220-300g / l nickel sulfate, 15-25g / l cobalt sulfate, 30-40g / l boracic acid and 15-20g / l sodium chloride, wherein the temperature of plating liquid is 30-45 Deg C with pH value at 3.8-4.8 and current density at 4-10A / dm2.

Description

technical field [0001] The invention relates to a method for ultrasonically electroplating a diamond drill bit. Background technique [0002] At present, electroplating diamond drill bits are mostly simple low-temperature electroplating processes, and generally adopt small standard current density, low electroplating speed, and long production cycle (7-12 days), except for a few who slightly increase the electroplating speed by heating or circulating the plating solution In addition, there is no production process that introduces ultrasonic waves into the diamond bit electroplating process. [0003] The conventional electroplating process of diamond drill bits is pre-plating in the tank-sanding-thickening composite plating-sanding-re-thickening plating for multiple cycles. The main disadvantages of this conventional method are: the increase of the current density is limited due to cathode polarization and concentration polarization, so the allowable current density range is...

Claims

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Application Information

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IPC IPC(8): C25D5/20C25D3/56C25D7/00
Inventor 方小红潘秉锁段隆成杨凯华
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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