Experimental Study on Magnetic Abrasive Honing of Inner Surface of Tube AISI۳۰۴

To overcome the limitation of honing process, the present work proposes magnetic abrasive honing (MAH) process whereby abrasive stones are replaced by magnetic abrasives. This process is combination of magnetic abrasive finishing (MAF) and honing. MAF which is one of the finishing processes can improve the quality of workpiece surface with various geometries, removing the chips in micrometer scale by magnetic field forces. This study set to apply longitudinal vibration to the tube workpiece in MAF process; hence, this process is called MAH. The effects of rotary speed of workpiece, cross-hatch angle, and mesh number were investigated on the surface roughness of AISI ۳۰۴. Magnetic abrasives were combination of SiC particles as abrasives and iron particles as ferromagnetic particles in lubricant of SAE ۴۰ oil. The results revealed that the longitudinal movement of workpiece is effective on MAH, as the surface roughness decreased with increasing the cross-hatch angle. Surface roughness decreased with increase of rotary and mesh number. The major changes in surface roughness (۵۸%) were obtained in cross-hatch angle of ۴۵º rotary speed of ۸۰۰ rpm and mesh size of ۴۰۰. The microscopic picture showed that three-body wear mechanism is dominant for fine grits.

کلیدواژه ها:

AISI ۳۰۴ ، Honing ، Inner surface ، Magnetic abrasive ، Surface Roughness