Method for ultrasonic electroplating of diamond drilling bit

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...