Electrochemical Honing of Cylindrical Parts-An overview

Electro chemical Honing (ECH) is one of the most potentially emerging unconventional machining processes. This is a hybrid machining process combining the capabilities of electro chemical machining (ECM) and conventional honing. Owing to its advantages of both the processes, ECH is capable of producing high surface finish, tolerance, controlled surface generation of cross-hatch lay pattern or completely stress free and correction of geometrical inaccuracies on cylindrical work pieces such as out-of roundness, cylindri city, axis distortion etc. with very high productivity as compared to conventional super finishing processes. Surface finish of the order of 0.05μm and tolerance within ±0.002 can be obtained. This is well within the category of super finishing. This paper presents a complete review of electrochemical honing of cylindrical parts including internal holes, internal and external surface of cylinders with the objective to highlight the capabilities of ECH process. The competence of ECH towards achieving super finishing is mainly focused.