Projeto de um alimentador pneumático de matéria-prima para um centro de usinagem três eixos

• Autor(a) principal: Brandino, Felipe
• Data de Publicação: 2019
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/234908
• topic: Raw material feeder; Three axis machining center; Machining operation costs; Alimentador de matéria prima; Centro de usinagem três eixos; Custos de operação na usinagem; Usinagem; Custo industrial; Válvulas

The historical scenario of Brazil, with regard to the development of the national industry, is not one of the most stimulating, the country has not yet consolidated itself as an industrial power in the face of the disparities found between the levels of manufacturing competitiveness in the global scope. In this sense, the proposed work aims to present a satisfactory solution for a machining industry that has, in its productive body, the process of preparation of raw material. With this, possible solutions for problems such as the long downtime for feeding raw materials and machine setup are added. Thus, the mechanical and pneumatic design of a raw material feeder for a three-axis CNC machining center, established here, was developed, first, by choosing the actuator responsible for tightening the pneumatic vise, since the lack of tightening of the same or an excessive tightening could cause unfavorable effects for the machined part, thus, the component DNCT-125-300-PPV-A was selected. This component would allow an adequate tightening pressure and a satisfactory operating condition. In a second step, the definition of an actuator responsible for moving the machined part was also necessary, since it would need to be guided so that it would not flex during its performance. The FESTO DLGF-KF-20-800-PPSA actuator was therefore able to minimize the effects of bending by presenting a peculiarity of its composition due to the presence of auxiliary rods. In parallel to this, the selection of a third actuator responsible for supporting the weight of the machined part and the last one, which overcame the static friction force and moved the raw material under specific conditions, was done through the FESTO DSNU-20 actuators -50-PA and FESTO CDC-25-200-AP. Finally, the choice of valves that corresponded to the movement of all the actuators defined here demanded important attention so that, thus, the system would function properly and satisfy all the proposed automation. As the pressure regulating valve, the FESTO LRMA-M5-QS-6 was chosen for the activation of the pneumatic circuit sequence, the FESTO Trigger valve L-3-M5 and, for the identification of the actuator limit switch, the valve chosen was the FESTO K-3- M5 button. In this way, the project developed and described in this document was able mainly to optimize raw material feeding operations in order to minimize operator idleness and reduce possible injuries caused by repetitive effort