Abstract
Ball burnishing is a plastic deformation process used as a surface smoothing and surface improvement finishing treatment after turning or milling processes. This process changes the surface stereometrics of the previously machining surface. Burnishing with hydrostatic tools can be easily and effectively used on both conventional and Computer Numeric Control (CNC) machines. The existing research of the burnishing process mainly focuses on the functional surface characterization, for example, surface roughness, wear resistance, surface layer hardness, etc. There is a lack of references reporting a detailed analysis of 3D parameters calculation with a mathematical model to evaluate the results of the ball burnishing. This paper presents the effect of ball burnishing process parameters with hydrostatic tools on the resulting surface structure geometry. The surface topography parameters were calculated using the TalyMap software. Studies were conducted based on Hartley’s static, determined plan. Such a plan can be built on a hypersphere or hypercube. In this work, a hypercube was used. In the case of Hartley’s plan makes it possible to define the regression equation in the form of a polynomial of the second degree. The input process parameters considered in this study include the burnishing rate, applied pressure, and line-to-line pitch. The significant influence of these parameters was confirmed and described as a mathematical power model. The results also showed a positive effect of hydrostatic burnishing on the roughness and geometric structure of the surface.
Highlights
Surface quality plays a very important role in the proper formation of the properties of the machine part components
Burnishing allows to improve the properties of a surface layer by its plastic deformation
The results showed that the burnishing force has the least impact on the reduction of the surface roughness
Summary
Surface quality plays a very important role in the proper formation of the properties of the machine part components. The results show that the raster strategy is a good solution for the curved-shaped surfaces due to the process stability in relation to the tool position and burnishing force In his further works, Swirad [20] presented the possibility of ball burnishing for alphabeta titanium alloy (Ti6Al4V). The research findings indicate that continuous burnishing allows to achieve a significant reduction in the surface roughness This treatment is limited by the maximum speed of the machine headstock (or table) rotary axes. The Hartley research plan was used in order to obtain a mathematical description in the form of the equation of the input parameters impact of a ball burnishing process on the selected parameters of a geometric structure.
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