Projeto de uma dobradeira de tubos

Abstract

The bending process is a mechanical forming, which can be used to bend plates and tubes. The cylindrical tube sections are highly used in industry due to the high rigidity for low weight. In some applications of cylindrical tubes is necessary perform some bending is for aesthetics, or the needs of geometric or simplification projects. An example of the need for tube bending is in the construction of vehicle structures as in Baja SAE Project. Therefore, this work proposes to develop the design of an automated machine drive that is capable of bending cylindrical tubes of diferente diameters and diferente radii and angles. The methodology of this project is based on the following steps: literature review, existing machines in the market research, determining the parameters, machine concept, analytical design, finite elemento simulations, selection and specifition of machine elements, control system design and in the end realization of the memorial project. The bending machine projected tube has its functioning based on the tensile bending, where the tube is fixed in a circumferencial matrix, and is doubled when you rotate this matrix around its axis. This machine has a three-phase electric motor and a mechanical reduction to transmit power to the axis of the matrix. The machine also has an automation system performed by a micro controller, where the operator informs the desired angle and the machine keeps the engine running until the angle of bending required. The project undertaken lets you fold in steel pipes up to 11/4” in diameter with a maximun of 3,35 mm wall thickness, with a radius of bending up to 300 mm.