EXPERIMENTAL OF EFFECTED ON THE RESIDUE STRESS FOR THINNER AL2O3-TIC IN GRINDING AND CUTTING PROCESSES

One of the residual stress is imported the bending on thin material in the machining processes. In this work, to study the surface residual stress on the Al2O3- TiC component used as a substrate for a read-write head in the hard disk drive. In manufacture, both sides on thin material are machined by grinding and cutting process, a cutting tool is used the thinner diamond blade of fine grain size and grinding wheel of fine grain size, the high precision machine is carried out according to the method of experiments. The results are experimented by bar bending, bar parallelism, the surface roughness of grinding size and surface roughness of cutting side, and compared the results by analysis of variance (ANOVA). The results revealed that the blade type and grinding level affected the bar bending, the bar parallelism is not significantly affected, and surface roughness of the grinding side is improved by the grinding level, while the surface roughness of cutting side is main affected by blade type. The optimization show percentage error of experimental and prediction lower than 1.5% by each responds.