10 found that a decrease in ball diameter caused a reduction in the surface roughness height of aluminium alloy by 75%. 9 obtained a decrease in the Ra parameter of the steel surface from 3.4–4.5 to 0.13 µm due to burnishing by a ceramic ball.Įl-Tayeb et al. An increase in the burnishing load led to surface smoothing. 8 achieved a decrease in the height of the roughness of 95% of material used in optical moulds due to ball burnishing of tungsten carbide, the initial surface roughness determined by the Sa (Ra) parameter was 5 µm. The effect of additional vibration on the reduction in surface height was positive when the initial value of the Sq parameter was less than 2 µm. Changes in skewness Ssk and kurtosis Sku were also considered. roughness height Sq of Ti-6Al-4 V surfaces due to ball burnishing. 6 obtained a reduction in the Sa parameter (areal extension of the Ra parameter) of almost 50% due to ceramic ball burnishing of hardened shaft. 5 reached a decrease in the Ra parameter of oxygen-free copper from 0.89 (after milling) to 0.18 µm due to ball burnishing.ĭzionk et al. 4 found that ball burnishing of AISI 316L steel led to a decrease in the Ra parameter of up to 93%.īanh et al. The researchers mainly studied the effects of ball burnishing on the decrease in the height of the roughness 4, 5, 6, 7, 8, 9, 10, 11.Īttabi et al. Ball burnishing generally leads to surface smoothing, increased hardness, and compressive stresses 3. Typically, the burnishing load, forward speed, and feed were the input parameters 2. In most of the works, the quality of the surface layer was estimated on the basis of surface roughness characterized by the Ra parameter (average roughness height), microhardness and residual stresses 1.

Typically, the diameter of the sphere is between 3 and 12 mm. Because environmental pollution is small, this process is an interesting alternative to grinding. It leads to an improvement in the surface finish as well as in the physical and mechanical properties of the workpiece. Ball burnishing is a finishing process that causes plastic deformation of a surface in which a hard ball is moved and pressed onto the surface.

After effects round 3d stroke