Investigation the Surface Characteristics of Copper Using Extrusion Honing Process
Keywords:
Surface finish, Extrusion honing, Copper, Abrasive Flow machining, Silicone, SiC.Abstract
Extrusion Honing is an advance machining process which is used to machine complex shape and is used to deburr,
remove recast layer and radius surfaces and it is also known as Abrasive Flow Machining. This experiment uses a developed
Extrusion Honing machine and an experiment employing abrasive flow machining was conducted on copper. In this experiment
AFM parameters such as abrasive particle size, concentration, and number of cycles were carried out. In the optimization work
surface roughness taken as output. The surface finishing is better with use of abrasive flow machining process as compared to
other flow machining processes. It promises to provide accuracy and economy needed for manufacturing. Material is removed by
flowing abrasive laden media under pressure through the work piece surface to be finished. The abrasive media applied during this
process is a semisolid visco-elastic abrasive laden polymeric media which carries silicon carbide grains. In this study, Extrusion
honing of Copper has been performed in a hydraulic operated EH setup using select grade of polymer as a carrier medium and
Silicon Carbide (SiC) grits of 36 mesh size as abrasives. The internal surface finish results are evaluated in terms of surface
roughness (Ra
, Rz
, Rt and Rpk) for 6 mm, 7 mm, 8 mm, and 9 mm hole diameter. The processed surfaces were measured and
analyzed with the help of surface roughness tester and Scanning Electron Microscope (SEM). Results show a significant
improvement in surface finish and EH/AFM is capable of removing the micro cracks and recast layer.
