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The present work investigates the possibility of adopting a new kinematics at the industrial polishing lines of porcelain stoneware tile. An alternative motion of the transverse oscillation of the polishing heads is proposed, in which no radical changes in the industries facilities are required. The basic idea is to replace the purely sinus motion of the polishing heads by a rather trapezoid wavelike motion. In theory this could be achieved simply by adopting regular delays at the transverse oscillation motion. Consequences of this alternative kinematics were quantitatively analyzed considering the spatial homogeneity of polishing expected for tiles. Such homogeneity was represented by the coefficient of variation of the distribution of polishing time over the surface, which was in turn determined by means of computational simulations, taking into account the effect of multiple polishing heads.El presente trabajo investiga la posibilidad de adoptar una nueva cinemática en las líneas de pulido industrial de baldosas de gres porcelánico. Se propone una propuesta alternativa de la oscilación transversal de los cabezales pulidores, en el que no hay cambios radicales en las instalaciones de las industrias son necesarias. La idea básica consiste en sustituir el movimiento totalmente del seno de los cabezales pulidores por un movimiento ondulatorio trapezoide. En teoría, esto podría lograrse sólo mediante la adopción de los habituales retrasos en el movimiento de oscilación transversal. las consecuencias de esta cinemática fueron analizados cuantitativamente, teniendo en cuenta la homogeneidad espacial de pulido. Tal homogeneidad fora representada por el coeficiente de variación de la distribución de lo tiempo de pulido en la superficie, determinada por medio de simulaciones computacionales, teniendo también en cuenta el efecto de pulido de las cabezas múltiples.

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For many applications, the surface quality, geometric accuracy and stress state of parts produced using laser-based powder bed fusion (PBF-LB) are insufficient. A stress relief and machining as postprocessing operations allow to overcome these issues. PBF-LB materials have a unique microstructure. Their machinability therefore differs from that of cast or wrought materials. The microstructure can be altered by a stress relief heat treatment, which can change the machinability further. In this paper, the machinability of AlSi10Mg parts in the as-built condition and stress relieved condition is examined when wet and dry peripheral milling with cutting speeds up to 1,000 m/min. The PBF-LB parts were manufactured in different build-up directions. The stress relief decreased the material microhardness by approximately 16 %. This lower microhardness did not significantly affect the process forces but influenced the surface characteristics. The best surface quality was achieved when milling with the highest considered cutting speed of 1,000 m/min and when using metalworking fluids. Particularly the number of surface defects such as the smearing of material could thus be reduced. For the as-built conditions, good surface qualities can be achieved in dry cutting with high cutting speeds. [ABSTRACT FROM AUTHOR]