Desenvolvimento, projeto e construção de sistemas e acessórios mecânicos destinados à automação de um cilindro de reparo por atrito portátil

Abstract

Arc welding is one of the most applied techniques to repair mechanical structures. However, it has different inconvenients and limitations that are not present on the friction processes as in FTPW (Friction Tapered Plug Welding). The FTPW comprises of three major steps: The first one is the drilling of a tapered blind hole with a specific geometry. Secondly, the hole is filled with a tapered plug coaxially introduced with rotation and axial load. The third and final step is the milling of the non processed rod and flash materials, thus obtaining the original surface flatness. This dissertation presents different developments made for a friction welding unit built at the Friction and Wear Technology Laboratory, enabling it to complete all major steps (drilling, filling and milling). Mandrels and special tools were also designed. The results showed that the redesigned hydraulic unit completed successfully all FTPW steps. Macro and microscopic analysis also showed free defects samples.