Electrolysis: processes – compositions used therein – and methods – Electrolytic erosion of a workpiece for shape or surface... – Sharpening or point making
Patent
1997-05-23
1999-11-30
Gorgos, Kathryn
Electrolysis: processes, compositions used therein, and methods
Electrolytic erosion of a workpiece for shape or surface...
Sharpening or point making
205684, B23H 300
Patent
active
059936380
ABSTRACT:
There is disclosed a method for edge rounding of cutting tool inserts, in combination with a high surface finish over the whole insert, 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 (HClO.sub.4) or sulphuric (H.sub.2 SO.sub.4) acid, in amounts >15 and <50 volume %, 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 in combination with a high surface finish over the whole insert which cannot be made by mechanical or other electrolytic methods.
REFERENCES:
patent: 4217190 (1980-08-01), Neal et al.
patent: 4405422 (1983-09-01), Blomsterberg
patent: 4411751 (1983-10-01), Blomsterberg
patent: 5334294 (1994-08-01), Iwai et al.
patent: 5380408 (1995-01-01), Svensson
patent: 5591320 (1997-01-01), Rolander
Dialog Information Services, File 351, World Patent Index 81-97, Dialog accession no. 004628367, WPI accession no. 86-131710/21, Muller K.: "Anodic Reconditioning of Cutting Tools in Sulphuric Acid Electrolyte Contg. Hydrogen Peroxide and Non-Ionogenic Wetting Agent"; & DD,A,232168, 860122, 8621 (Basic).
Dialog Information Services, File 351, World Patent Index, 81-97, Dialog accession no. 009186167, WPI accession no. 95-313604/38, Showa Denko KK: "Cemented Carbide Base Mfr. for Depositing Diamond Films--Comprising Blending Acicular Crystals of e.g. Carbide(s), Nitride(s), Sintering, Formed Protrusions by Polishing Sintering and Scratching Surface"; & JP,A,4221075, 920811, 9238 (Basic).
Dialog Information Services, File 351, World Patent Index 81-97, Dialog accession no. 004447684, WPI accession no. 85-274562/44, Medinstrument Prod et al: "Electrolyte for Electrochemical Sharpening of Cutting Tools Contains Sulphuric and Phosphoric Acid, Water and Additional Triethanolamine Sulpho-Salicylic Acid and Glycerine"; SU,A,1151399, 850423, 8544 (Basic).
Gorgos Kathryn
Parsons Thomas H
Sandvik AB
LandOfFree
Method for obtaining well-defined edge radii on cutting tool ins does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for obtaining well-defined edge radii on cutting tool ins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for obtaining well-defined edge radii on cutting tool ins will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1667124