A MODELING STUDY OF MATERIAL CUTTING WITH ABRASIVE JET FINISHING RESTRICTED BY GRINDING WHEEL
The aim of abrasive jet flow finishing (AJF) process as a new lapping technology is to remove further the surface defect layer and diminish roughness and ripple. The material removal mechanism of AJF was investigated based on the size ratio of characteristic abrasive size to film thickness between grinding wheel and workpiece. Two body lapping and three body erosion mode by a single abrasive and the mode of material removal rate were established. Experiments were performed on a cylindrical grinder MB1332A with a 45 steel workpiece as specimen of which the surface roughness values of Sa=0.6μm.The micromorphology of machined surface was observed using SEM and the microcosmic geometry parameters were measured with MICROMESVRE2 profilometer. It is found that experimental result matches theoretical analyses. The machined surface changed from continuous parallel micro-groove to randomly distributed discontinuous micro-pit and Sa gradually decreased from an initial value of about 0.6μm down to about 0.2μm with the increase of machining circles. Furthermore, the isotropy surface and uniformity veins both parallel and perpendicular machining directions were attained by the finishing process to improve greatly the wearable capability of the workpiece.
Abrasive jet Precision finishing Two body lapping Three body erosion Material removal mechanism.
F.Liu Y.D.Gong Y.Q.Shan G.Q.Cai
School of Mechanical Engineering & Automation, Northeastern University, Liao ning, Shen yang China School of Material Engineering & Metallurgy, Northeastern University, Liao ning, Shen yang China
国际会议
上海
英文
1-8
2009-08-02（万方平台首次上网日期，不代表论文的发表时间）