Sistema automático de parafusamento de peças automotivas

Abstract

Operations of applying torque in screws is one of the core assembly activities in the automotive industry. The development of systems that allow the automation of tightening process is desirable to reduce labor costs, increase security, improve ergonomic problems and ensure the quality of the operation. This paper presents the development of an automatic tightener of screws of the brake set on the rear axle of an urban vehicle. The screws are located in such a way that access is difficult because of the presence of moving parts. The system purpose is to locate the access to the screws, align the parts, put the tool in the access, manipulate the tool, fit it on the screws, which are pre-threaded, and apply the torque prescribed in a predetermined order. To such development, a product development methodology proposed by Back (2008) was used. Tools such as QFD matrix for identifying customer and design requirements and morphological matrix were used to determine the solutions to be used. A proposed solution for automating the tightening process will be presented. The final work is a descriptive memorandum of the project containing the 3D CAD model with layout and schematic drawing of the proposed solution, the list of equipment used with their suppliers and estimated price, the operating principle of the system and the logic used.