Dynamic Frictions between AISI 316L and 3M~(TM) Trizact~(TM) Structured Abrasive Beits during Mirror-like Polishing

摘要

polishing is an essential process for deriving of the mirror-like surface of the AISI 316L stainless steel to minimize the surface roughness. Sliding, plowing and cutting, the fundamental mechanisms of abrasive machining, are occurred during the polishing and then would decrease the roughness on the surface. By 3M? Trizact? structured abrasive belts, the previous stainless steel are polished. Pyramid arrays containing the abrasives and epoxy formed on the belt give the abrasive machining. The glass transition and degradation temperatures of epoxy are about 150 and 250 degrees, respectively. The friction coefficient between the AISI 316L workpiece and 3M? Trizact? structured abrasive belt under different rotational speed may affect the polishing efficiency and the cost. The mechanism of the abrasive machining includes the sliding, plowing and cutting while the previous two are preferred during polishing. By 3M? Trizact? Structured Abrasive belts, the grit sizes are #800 and #2000, the MIM stainless steel cases are polished. The contact dynamic friction coefficient induces a higher specific polishing energy, the polishing temperature is thus increased. Deriving the friction coefficient is therefore important for stainless steel polishing. Experimental results indicate that the dynamic friction coefficient decreases respect to the rotational speed and the press-on force of workpiece. The coefficients of friction of all the workpieces under different tangential velocity are in a large range of 1.2-5.6, but the friction coefficient of the tangential velocity of 23.56 m/sec shows slightly variation even press-on force in 5 Newtons or in 20 Newtons.