Estudo do custo de fabricação de um cubo de roda de bicicleta urbana

Abstract

The global economy is becoming increasingly competitive, demanding that all its sectors be more agile, efficient, and cost-effective. With intense competition for investments, especially in the manufacturing industry, it is essential for factories to present high-quality projects that are economically viable and financially attractive. Moreover, the market is demanding that professionals perform multitasking roles; for instance, an engineer needs to be able to design a building, a machine, a circuit, but also understand the process execution of their projects and the associated costs. This study focuses on the calculation and analysis of manufacturing costs for a bicycle wheel hub produced by machining. It presents the most suitable machining methods for producing this part, the execution steps for each method, and a study involving the calculation of costs for each production stage, depending on the number of pieces manufactured. The part’s manufacturing was conducted at the Atelier de Fabrication Mécanique of the École Centrale de Lille, where data on the machines and tools used in the process and the time spent on each production step were collected. A literature review was conducted to support the equations presented and the calculation method used. Throughout this practical study, fixed and variable costs related to the manufacturing of a wheel hub were analyzed. Finally, it was possible to compare the cost of each stage of the manufacturing process based on the number of pieces, enabling the analysis of cost behavior, identification of the most relevant manufacturing costs, and the development of possible measures to optimize the manufacturing process financially.