Impactos causados por vibrações mecânicas em chapas de alumínio no processo de laminação a frio

This paper purpose is to analyze one of the main problems faced by cold rolling industry of the current time, the mechanical vibration. Factors such as strips with high velocity in order to increase the productivity and thickness becoming thinner and thinner cause the vibrations to be present at all times during rolling. These market requirements also drive the industry for technology development and thus bring the challenges that the operation of a new modern equipment and more powerful. The initial purpose is to analyze the forces that cause vibration in a rolling mill type four high with two stands, where is desirable to identify the origins of these vibrational forces to make possible dismiss them or at least control its intensity, in order to prevent damage in the rolling mill and ensure product quality to the customer. For it, will be used instruments to record and store the vibrations that occur during the lamination process. With this data will be able to analyze the characteristics of the vibrations and act at your elimination. At the end of the work is expected to demonstrate how important the critical view of the engineer in the analysis of graphics combined with the calculations of the natural vibration frequency and engagement of key parts of the laminator. With these two tools at hand, will be possible to increase the productivity of the rolling mill and act preventively in maintenance, thereby reducing your downtime and increasing its performance and efficiency

Gráficos de T² para o monitoramento de processos multivariados autocorrelacionados

In which refers to statistical process control, the analysis of univariate cases is not enough for many types of company, being necessary to resort to multivariate cases. Besides, it is usually supposed that the observations are independent. However, the violation of this hypothesis indicates the existence of autocorrelation in the process. In this work, by a basic quantitative approach for an exploratory and experimental research, the study target are the multivariate autocorrelated control charts, using Hotteling T². The ARL values were collected by simulations of a computational program on FORTRAN language, with objective of studying the charts properties, in addition to compare with the

Desenvolvimento do Atlas da Questão Agrária Brasileira: análise da dinâmica territorial recente da agropecuária brasileira (2006-2012) e da participação da agricultura camponesa na produção do campo (2006)

This monograph is part of the works developed in the Scientific Initiation aimed at updating and improving the Atlas of Brazilian Agrarian Question - AQAB. For pioneering and scope of work-matrix, the objective this first part focused on the development of issues related to agricultural production, being drawn maps with data from the Municipal Agricultural Production-PAM 2012; Municipal Livestock Research-PPM 2012; Production of Vegetable Extraction and Forestry-2012, all analyzed from bibliographic review and joint interpretation of tables and graphs. Pari passu, this topic allowed the development of studies on peasant farms, because they are correlated subjects. Peasant farmers produce large portion of the food served to the population. Its features are its mode of production in the field, the way in which the activities take place within the family, the struggle for their social reproduction and by the earth, the practice of polyculture, preservation of the environment and the genetic diversity of species. The surplus production is sold on the market to meet other family demands unmet by production on their properties. We understand that both terms; Peasant or Farmer, refer to the same subject, but with different interpretations of their way of social reproduction and market relations...

Análise da resistência à fadiga de tubos de aço API 5CT N80 Tipo Q soldados via processo de indução magnética de alta frequência (HFIW)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Biocompatibilidade de resinas acrílicas para base e reembasamento de próteses após períodos de imersão em soluções desinfetantes: análise do metabolismo celular

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)