Influence of Thermal Modified Pinewood on the Quality of Machining at Plain Milling

Abstract

The theory and practice in engineering industry is not the same. Durability of cutting tools is defined in standard ISO 3685. In standard ISO 3685 is defined T-vc dependence for different cutting materials and standard included process evaluation of tool durability for cutting materials made of high speed steel, sintered carbide and cutting ceramic. Standard ISO 3685 contains instructions how to create T-vc dependence for cutting tools made of cutting ceramic. In this standard are only instructions how to create T-vc dependence according to Taylor. The article compares T-vc dependencies for various cutting ceramics (Al2O3, Al2O3+ZrO2, Al2O3+TiCN) with T-vc dependence defined in standard ISO 3685, because this standard describes T-vc dependence for all entered cutting materials together.

Effect of chip thickness, wood cross-sections, and cutting speed on surface roughness and cutting power during up-milling of beech wood

“…Thus, with an increase in feed speed surface roughness will increase. This dependence has been confirmed by many authors both for solid wood (Kvietková et al 2015;Vanco et al 2016) and for wood-based materials (Davim et al 2009;Guo et al 2015). For cutting power, an increase in this parameter was observed with an increase in chip thickness and cutting speed.…”

“…Another study by Aguilera and Martin (2001) tested beech wood while applying three cutting speeds and observed comparable roughness for all the conducted tests. Some reports have also been published where researchers stated an effect of cutting speed on surface roughness (Kvietková et al 2015), whereas other authors confirmed this dependence only in some cases (Ispas et al 2016;Vanco et al 2016) or reported only a slight effect (Han et al 2004). In turn, cutting speed significantly affects cutting power.…”

“…It was applied to measure the most typical roughness parameters: Ramean roughness and Rzmean peak-to-valley height or total roughness. Various authors often provide either parameter Ra (Škaljić et al 2009;Budakçı et al 2013;Sofuoǧlu and Kurtoğlu 2015;Vanco et al 2016;Koleda et al 2019;Rajko et al 2021) or Rz (Malkoçoğlu 2007;Aguilera et al 2016), or both of them jointly as indicators of surface quality (Pinkowski et al 2018). In some publications, to ensure a more extensive analysis of tested surface parameters, Ra and Rz are supplemented with parameter Rt (Davim et al 2009;Sogutlu 2010;Pinkowski et al 2016) as well as other additional parameters (Kilic et al 2006;Ispas et al 2016;Gurau et al 2017;Hacibektasoglu et al 2017).…”

“…Many studies have already been conducted to determine dependencies between individual factors and their effect on machining quality and cutting power. The influence of feed speed on roughness (at a constant cutting speed) has been investigated by many researchers, who at an increasing feed speed found an increase in surface roughness of solid wood (Škaljić et al 2009;Vanco et al 2016) and wood-based materials (Davim et al 2009;Guo et al 2015;Wang et al 2015), while some studies also showed a negligible effect of feed speed on roughness (Malkoçoğlu 2007).…”

“…The effect of cutting speed on surface roughness has also been investigated; however, in this case the dependencies were not consistent. Some authors indicated a positive effect of an increase in cutting speed on surface roughness of machined wood (Han et al 2004;Kvietková et al 2015;Ispas et al 2016;Vanco et al 2016)although it was not always and with a slight increase only in some casesas well as wood-based materials (Guo et al 2015). Some analyses were conducted showing no effect of cutting speed on machining quality (Aguilera and Martin 2001;Aguilera et al 2016;Rajko et al 2021).…”