Abordagem seis sigma na análise da variação de batimento radial do eixo na montagem de um motor elétrico trifásico

Abstract

Quality control plays a crucial role in the industry and ensures customer satisfaction, operational efficiency, and a company's reputation. The development of improvements in production processes through the application of methodologies aims to reduce spending on internal rework and the rate of defects in the external customer. This work aims to apply the Six Sigma methodology to analyze the process variables that cause the variation of the radial beating measurement in special shafts during the production of three-phase electric motors. The work was developed from a theoretical review of the principles, techniques, and tools for the Six Sigma approach and the importance of statistical process control in quality control in the industry. Then, an experiment was conducted on the assembly of electric motors to exemplify the Six Sigma approach for analyzing the radial beat variation in the shafts. It is concluded from this that, contrary to what was expected prior to the experiment, the assembly of the electric motors, in most cases, reduces the radial shaft beat measurements, thus obtaining a negative measurement variation. However, the radial shaft beating variation results had widely dispersed values with a significant standard deviation. Regarding the radial beating values on the shaft obtained at the beginning of the assembly, it is recommended to form a task force with engineers, technicians, and inspectors to implement improvements in the production process and make it more stable.