Influence of belt speed, grit sizes and pressure on the sanding of Eucalyptus grandis wood

Abstract

The sanding process is important to the quality of wood products. Sanding reduces imperfections in wood surfaces and it is important to the final product and application of paints or varnishes. There are few studies about sanding in the literature and finding out the relationship between the input parameters (i.e., species of wood, grit size, abrasive) on the output parameters (i.e., roughness, force, pressure) will help to improve this process. This study analyzed the influence of input parameters as belt speed (cutting speed), grit size and pressure on the output parameters as surface roughness, cutting force (sanding force) and power consumption on cross-grain sanding of Eucalyptus grandis wood. The tests were performed with 3 types of grit sizes (80, 100 and 120 grit), 3 belt speeds (10, 11 and 12 m/s) and 2 pressures (219.89 and 283.44 g/cm²). The surface roughness was analyzed based on roughness average (Ra). Sanding efforts were analyzed by cutting force and power consumption. It was found that the 100 grit size provided the lowest cutting force. It was observed that the belt speed, pressure and grit size influenced the surface roughness, cutting force and power consumption. The best surface finishes were obtained in tests with higher pressure.

Analysis of Sanding Parameters, Sanding Force, Normal Force, Power Consumption, and Surface Roughness in Sanding Wood-Based Panels

“…Different from previous studies (Varasquim et al 2012), no relationship between nF and Ra can be found, and the relationships of nF with P and ε are also not obvious. The surface becomes smoother (scribing width increase) with increasing pressure when sanding metal (Tan et al 2012); however, for wood-based panels, the textural and inhomogeneous characteristics cannot be neglected.…”

“…At the same time, other sanding parameters also affect the R of wood materials. In most cases, smoother surfaces can be obtained with greater pressure (Hendarto et al 2006;Varasquim et al 2012).…”

EFFECTS OF BELT SPEED, PRESSURE AND GRIT SIZE ON THE SANDING OF Pinus elliottii WOOD

“…Differently from the grit size, the belt speed and pressure, which were not significant in the variance analysis, according to the statistic results for belt speed (F 2,204 = 1.3761; p-value>0.05) and pressure (F 2,204 = 0.4699; p-value>0.05). Similar results were found by Varasquim et al (2012) on the sanding of Eucalyptus grandis wood. Figure 6 shows that there is no influence of belt speed and pressure on the surface roughness for Pinus elliottii wood.…”

Evaluation of Selected Properties of Alder Wood as Functions of Sanding and Coating

“…The wood industry sector does not belong to the list of the highest power industrial consumers, but the sanding process of wood is considered to consume the most among all the processing steps. It was proven that the power consumed for sanding the wood increased with the belt speed and the feed speed, while a low variation was noticed for the increase of the cutting depth [3,4]. A light cutting depth can sometimes provide low sanded areas, while an overly high cutting depth may lead to belt wear, increased power consumption, and a low surface quality [30].…”

“…The product quality is influenced by rational and optimal fabrication based on some specific technologies. To implement such optimization, two certain criteria should be simultaneously fulfilled, namely, having the best surface quality and the best cutting performance [3,4]. Several factors of the wood-machine-tool interaction influence the surface quality through the machining process during sanding, including properties of species, density, and moisture content, as well as cutting parameters such as pressure, belt speed, feed speed, cutting depth, processing direction, abrasive tools [5][6][7][8][9][10], cutting force, and power consumption [4,11].…”