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Electroplated diamond and CBN tools are produced using exclusively steel, aluminium or non-ferrous cores, the latter two being
used only in exceptional cases. Before the electroplating process, contacts are established on the tool by means of brass bushings
or special jigs. The cross-sectional area of the cable is determined by the surface area that requires plating.
Next, those parts of the tool which are not to be plated are masked using a range of materials (special lacquers, self-adhesive
tapes and plastic jigs). The parts requiring plating are exposed and the surface area calculated so that the plating program can
be generated. The plating process itself then takes place.
After initial mechanical cleaning, plating pre-treatment takes place in various electrolyte baths so that optimum adhesion of
the diamond and CBN layer can be achieved. The prepared tool can then be placed in the nickel plating bath in the appropriate
jig. The tool is connected electrically and the jig is filled with diamond or CBN. The rectifier will have previously been adjusted
to the correct current output by the plating program. The plating process commences.
After a pre-determined period, the particles are bonded to the tool blank. It must be turned and refilled. Afterwards the tool
is removed from its jig and placed in the nickel bath to complete the particle bonding process. The thickness of the coating is
determined by the particle size and the intended application of the tool.
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| DIAMOND AND CBN COATING |
| Electroplated grinding
tools possess a highly concentrated diamond and CBN coating. Protruding from the bond, the specially graded and precisely
sieved particles give the tool its particular cutting performance and enhanced stock removal capability. The electroplated
bond enables profiles to be coated precisely which is not possible with sintered tools. |
| DIAMOND COATING IN DETAIL |
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S) Layer thickness
1) Tool blank
2) Bond
3) Grinding particle
4) Grinding particle base
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