DefinePK

Abstract

Application of digital technology allowed to analyze a bearing surface of flat parts made from VT22 alloy during grinding by high porous wheels (HPW): CBN30 (B76, B126, B151) 100 OV K27 – KF40 and (37C, 39C) 46 I12 VP produced by Norton company. A pseudo-regular macro relief with straight-through cavities was identified on the surfaces of parts; the cavities are located along their length, and the intensity of the formation of cavities is concentrated in the zone of cutting into HPW with transversal feed. After ending of transversal movement its zone of contact with HPW is rapidly decreasing reaching zero. That strengthens the formation of a bearing surface of parts without connecting cavities on a surface, which are correlated with a transversal movement. Among CBN HPW the largest bearing surface was demonstrated by fine grain tools, and among Norton HPW – grains 37C. For the increase of a bearing surface of parts it is necessary to decrease the cutting depth t in the end of a path. The best precision was demonstrated by Norton HPW: 37C at t =0.005 mm, 39? at t =0.01 mm.