Manufactura de un cabezote de un prototipo de motor de dos tiempos mono cilíndrico 100cc aplicando ingeniería inversa y el método CAD/CAM

Abstract

It is intended to manufacture a head of a two-stroke engine prototype of a single cylinder using reverse engineering and CAD / CAM method using the laboratories of the Mechanics School. In order to carry it out, the material of an engine head of reference was characterized, then it was continued with its geometrical form by applying software of Computer-aided design (CAD) for later its printing in 3D, once the mould was obtained, the sand was prepared to shape it, in this case it was conducted by means of a green cast; it was cast and then by injecting the carbon dioxide to harden the moulds, the moulds were joined together and after that the aluminium was melted, they were added alloying materials such as zinc 1.92%, silicon 1.35% and copper 1.62%. In addition, fluxes as sodium and tin were added to remove the gases and to make the foundry more fluid at the time of collation. When applying the alloying elements, a maximum temperature of 1000 degrees centigrade was obtained, being favorable for the head. Once the casting was carried out, the surplus material was removed from the head. In order to be completed, the casting head was placed in the CNC machine and by the ISO codes obtained, the machining and a process of ageing were carried out. It is concluded that there are machines and tools needed to manufacture automotive parts, in this case it was achieved with satisfaction to obtain an engine head similar to the reference, in view of this the Faculty of Mechanics is able to manufacture automotive parts. It is recommended to improve the machines and tools since, with the new existing technologies, it is more expensive to manufacture by the green casting method which was applied.