Vertical Milling How to Brush Plating Process

Vertical milling machine how to Brush plating process
(1) mechanical preparation before plating
 Will be clamped in the lathe spindle, 60 °, respectively, at both ends of the central hole repair, surface coarse and heavy degrees Ra0.8. Then the universal cylindrical grinding machine for grinding the central hole as a benchmark and 1:12 left outside the park outside the cone, less wear some good. Then cleaned with acetone surface to be coated, and coated with polyester tape will not protect the adjacent parts of the paste to prevent false-plated.
 (2) Net power
 In the clean-up, based on the electricity net fluid power processing workpiece surface to be coated to the oil rust. Scale is to flush the oil when the average water film can be separated from the surface. Time to pay attention to the net short power to reduce the workpiece hydrogenation.
 (3) brush transition layer
 On the basis of the activation, followed by the special nickel-plated brush vertical milling machine as buffer layer, the plating thickness to 2μm. It is mainly to advances in plating coating and the bonding strength and not confusion.
 (4) activation
 Appropriate choice of activation of the activated liquid on the surface to remove the surface oxide film to expose the metal substrate surface for coating and the substrate to create a good combination of the premise. But to pay attention to avoid the current, active for a long time, the workpiece temperature rise caused by large surface oxidation layer. Found immediately after the oxide layer cleaned.
 (5) working layer of plating
 Plating layer of rapid transition layer of nickel after the brush work, do not wash. Be without electricity after wiping 3 ~ 5μm, polarity, voltage, power and then you can change brush speed. Spindle with warm water to bath heated to 50 ℃, horizontal Universal milling machine with a low current start plating, and then gradually increase the current, to avoid the spindle and low bath temperature through use of high voltage, high current caused by coating stress is too large, the coating cracking peeling.
 (6) coating to restore the size of the spindle machining
 Clamping in the spindle universal cylindrical grinding machine, the choice of green silicon carbide wheel. Nickel coating for no spark in the grinding, in order to facilitate the knife, painted in red lead powder coating. By 1:12 there wear big end just outside the cone, so just look outside the cone is 1:12 of Omo no damage will be grinding at the access level to restore the coating; also with new bearing cone with the research, colored cage cover more than 80 percent can be.
 (7) after milling off the brush plating process
 Remove the shield protecting the anode material, cleaning bath residue on the workpiece, and anti-rust treatment.
Support for the progressive stiffness of the spindle, the spindle axial movement to reduce the amount of response to applied preloaded bearing E46117, inside and outside the ring to move between the body and produce pre-deformation, in order to eliminate the gap, progress axis accuracy and rigidity, reducing vibration and noise, progress bearing load average and life.