This study experimentally investigated the effects of machining parameters on the built-up-layer (BUL) and built-up-edge (BUE) formation and the wear behavior of cutting tools during the machining of the AISI 310 austenitic stainless steel with titanium-carbide cutting tools. Five different cutting speeds (50, 75, 100, 125 and 150) m/min, three feed rates (0.15, 0.20 and 0.25) mm/r and two cutting depths (1.5, 2) mm were used as the cutting parameters. The highest accumulation of the BUL and the BUE was observed at a cutting speed of 50 m/min, a feed rate of 0.15 mm/r and a cutting depth of 1.5 mm.
In this work, a surface roughness analysis versus machined length of AA7050 aluminium pieces obtained by turning process has been made. The parameter selected to define the surface quality of the pieces has been the arithmetical average roughness, Ra. Its value has been analysed for a series of test-pieces obtained under different combinations of the cutting parameters values (cutting speed, feed and depth of cut). The obtained results allow affirming the Ra value, in general, has tendency to decrease when the machining length increases. Within this general tendency, Ra values increase slightly with the cutting speed and more strongly with the feed.
We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero.