Parâmetros topográficos para avaliação, caracterização e controle tribológicos de superfícies de engenharia / Topographic parameters for evaluation, characterization and control of engineering surfaces

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The topographic characterization of engineering surfaces is very important in applications involving friction, wear and lubrication. This practice started in the 1930s and until now great efforts have been put to developing new methods for engineering surfaces. Although most of the surfaces are specified using 2D (two dimensions) parameters as Ra (average roughness), sometimes they are not enough to control and characterize the surface. A new group of parameters were developed which engineering and process designers are not only able to view their surfaces in much greater details, but they are also able to design and test surfaces with an eye toward functionality, i. e., to be produced, controlled and tested according to its application. The present work analyzes the present parameters widely used by the industry showing their advantages and their limitations. Experimental tests were carried out utilizing these parameters in the characterization of bearing surfaces after manufacturing as well its performance in the accelerated life test. Mechanical and optical profilers were used to make the measurements. It is shown that the parameters Ra, Rsk, Rk, Sbi, Sci and Svi can be used to characterize the surface manufacturing process as well its topographic evolution in an accelerated life test.

ASSUNTO(S)

parâmetros topográficos topographic parameters engineering surfaces mancal bearings superfícies de engenharia

ACESSO AO ARTIGO

Documentos Relacionados