Projeto de máquina utilizada para a confecção de bocas de lobo em tubos de 25 mm em fórmula SAE

Abstract

Notch tube are fittings made in tubes in order to connect two or more tubes with the same or different diameters for the creation of tubular structures. These tubular structures require manufacturing time as well as specific techniques for the creation of the surfaces, for a subsequent union by welding. In competitions the tubular structures provide a security area for the pilot. These fittings must be executed in order to ensure the design slope as well as to ensure the union of parts for the welded joint. The objective of this work was to develop a machine capable of making cuts in the shape of notch tube. It was used product development tools along with an adapted business model within a Formula SAE UTForce e-racing project. This design is important in decreasing the manufacturing time of the fittings, as well as with desired slope results, higher than the one found by the drawing method, where there are large dimensional variations. In the development process, it was determined the economic viability and manufacturing process within the SAE Formula team where the main characteristic was the use of material donated by sponsors, bringing the cost of the project to zero for the team, which resulted in the modification of the Business Canvas model. After the product’s manufacture was completed, tests were carried out to observe tubes cutting characteristics such as cutting time, cracks, slope and burrs. The cutting results of this new machine were compared with the traditional drawing making model and presented a difference between them. It is concluded that, the development project along with the business model adapted to design were tools that allowed the design of a new product that obtained better fitting’s results, enabling inexperienced users to manufacture notch tube in 25 mm tubes.