Investigation of a plain ball burnishing process on differently machined Aluminium EN AW 2007 surfaces

Abstract

Burnishing is an effective chipless finishing process for improving workpiece properties: hardness, vibration resistance and surface quality. The application of this technology is limited to rotationally symmetrical structures of deformable metals. Because of the multiaxial characteristics, the transfer of this force controlled technology on to prismatic shapes requires a comprehensive process development. The main purpose of this paper is the characterization of a plain burnishing process on aluminium EN AW 2007 with a linear moved, spherical diamond tool. The method of design of experiments was used to investigate the influence of different machined surfaces in conjunction with process parameters: burnishing force, burnishing direction, path distance and burnishing speed. FEM simulation was utilized for strain and stress analysis. The experiments show, that unlike the process parameters the initial surface roughness as 3rd order shape deviation does not have a significant influence on the finished surface. Furthermore a completely new surface is created by the process, with properties independent from the initial surface roughness.

Investigation of the Effect of Surface Burnishing on Stress Condition and Hardening Phenomena

“…An overlap is created between the working surface of the tool and the surface of the workpiece to be formed, and thus the tensile residual stress in the post-cutting surface zone is converted to a favourable compressive residual stress. This is one of the most advantageous properties of this process as, in addition to hardening, it also contributes to increasing the lifetime of the machine element, since it improves the resistance of the material to fatigue [14][15][16][17][18][19][20][21][22]. This paper deals with the examination of these two characteristics: surface micro-hardness and residual stress.…”

Modified Hexanit Cutters for Knurling of Cylindrical Shaft Sections

“…The influence of the components of the processing on the quality of the treated surface is considered in [9,10]. In particular, not only steel alloys are considered, but also alloys based on aluminum [11]. The price range of domestically produced diamond tips can be tracked on the Prom.…”

Modelling of the impact of burnishing force on average surface roughness

“…To study the mechanism of plastic deformation during burnishing Salashoor et al (Salashoor et al, 2018) created a 2D-FEM model of burnishing of Mg-Ca0.8 biomaterial using ABAQUS software, but only the tool indentation was simulated without any associated movements. Posdzich et al have already created a more complete 2D model (Posdzich et al, 2018) to presentation and interpretation of the relationships between the surface structure before and after the burnishing process and the effect of the burnishing force. According to the results of their numerical analysis the direction of the burnishing feed and surface structure of the pre-machined workpiece (surface before burnishing) have no relevant impact on the burnishing process.…”