The Electrochemical Honing process is a type of electrochemical machining that provides a smooth, accurate surface finish on cylindrical parts. It involves using an abrasive tool and electrolyte to remove material from the workpiece through both electrochemical and mechanical action. Some key aspects of the process include using an abrasive tool that moves longitudinally and rotationally within the workpiece while electrolyte is fed through holes under pressure. This assists the electrochemical removal of material while the abrasives further smooth the surface. The process can achieve a surface roughness between 0.1 and 0.5 microns and an accuracy of 0.01 mm in diameter and less than 0.05 mm in roundness. It provides advantages over conventional honing

1. ELECTRO CHEMICAL HONING
PROCESS
BY,
ARAVINDKUMAR B

2.  ElectroChemical Honing process comes under the process of
ElectroChemical Machining process.
 It is the usage of combined power of electricity and chemical
energy for the material removal from the work piece is known
as ElectroChemical Machining process.
 Now lets know about ElectroChemical Honing process.
ElectroChemical Honing process is mostly employed for
better surface finish, accuracy and economic aspects too.
 An ElectroChemical Honing Process consists of a tool, non
conducting abrasive honing stones, cylinder and an
electrolyte.
 It has a negative pole, a positive pole, electrolyte and a tool.
 In this process, the tool inside the cylindrical parts moves in
the longitudinal as well as rotational direction.
 To obtain uniform flow, the electrolyte is feeded to the tool
under pressure through the holes.
 The abrasive honing stones are pushed forward to move in
the slots under equal pressure in all directions.

3.  These stones help to assist the electrochemical action and also to
scratch the left over unfinished surfaces.
 Thus, a clean finished surface is obtained. If the shape of the work
piece is tapered or wavy, the stones cut all the high areas and
eliminate the geometric error.
 In conventional honing process, the abrasives used are
self dressed.
 There is a reduction in stock removal when the stones are glazed or
rubbed.
 If the abrasives are dressed quickly then the process becomes
more economical. Hence the abrasives are used properly in the
operation.
 In an electrochemical honing process, in order to obtain better
accuracy, the size of the tolerance on the diameter can be provided
at 0.01 mm and roundness can be maintained at lesser than 0.05
mm.
 It provides the surface roughness in the range of 0.1 microns to 0.5
microns.
 To attain a specified roughness on the work surface, the abrasive
honing stones are required to keep on the work for a few seconds
after the power is cut off.

4.  The surface finish of the electrochemical honing
process obtained is mostly based up on the following
terms.
1. Size of the abrasive grains.
2. Speed of the rotation and reciprocation.
3. Duration of the run out period.

5. ADVANTAGES OF ELECTROCHEMICAL HONING
PROCESS
1.ElectroChemical Honing process enhances the
material removal rate specifically for harder
materials.
2. There is no presence of burrs on
the finished surfaces.
3. ElectroChemical Honing process requires
minimum amount of work pressure on the tool and
the work piece.
4. ElectroChemical Honing process reduces the
noise level and distortion while honing thin walled
tubes.
5. ElectroChemical Honing process increases the
accuracy without damaging the materials due to the
provision of cooling medium.