MODELING AND OPTIMIZATION OF THE ROUGHNESS AND MICROHARDNESS IN DIAMOND BURNISHING OF CuAl8Fe3 BRONZE
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- TITLE: MODELING AND OPTIMIZATION OF THE ROUGHNESS AND MICROHARDNESS IN DIAMOND BURNISHING OF CuAl8Fe3 BRONZE
- ABSTRACT: In this article, the object of the experimental study is diamond burnishing of cylindrical specimens made of bronze CuAl8Fe3 in terms of the roughness obtained and microhardness. For this purpose, planned experiment, analysis of variance and regression analysis were performed sequentially. The governing factors were the spherical surface radius of the diamond tip, burnishing force and feed rate. Based on the regression models obtained of the roughness and surface microhardness, one-objective optimizations under the minimum roughness criterion and maximum surface microhardness, and two-objective optimization of the studied process were conducted. As a result, the respective optimal values of the governing factors were established. Using the governing factor optimal values obtained from the two-objective optimization, the impact of the number of passes and working scheme (one-way or two-way) on the roughness obtained and surface microhardness was additionally studied. It was established that the implementation of the diamond burnishing process with four passes in the conditions of one-way operating scheme provides roughness of m075.0R a and surface microhardness of .305HV050
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