Electrolysis: processes – compositions used therein – and methods – Electrolytic erosion of a workpiece for shape or surface... – Sharpening or point making
Patent
1995-12-04
1997-01-07
Valentine, Donald R.
Electrolysis: processes, compositions used therein, and methods
Electrolytic erosion of a workpiece for shape or surface...
Sharpening or point making
205684, C25F 316
Patent
active
055913202
ABSTRACT:
There is disclosed a method for edge rounding of cutting tool inserts of cemented carbide or titanium based carbonitride alloys. An electrolytic method is used with an electrolyte which provides an even removal of both binder phase and hard constituent phases. The electrolyte comprises perchloric (HC10.sub.4) sulphuric (H.sub.2 SO.sub.4) acid, 2-15 vol %, and mixtures thereof in methanol or other suitable organic liquid. The method is easier to control than conventional mechanical methods and is particularly useful for providing very small edge radii of about 10 .mu.m which cannot be made by mechanical methods.
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Sandvik AB
Valentine Donald R.
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