Roughness of Surface Created by Transversal Sawing of Spruce, Beech, and Oak Wood

Kminiak, Richard; Gaff, Milan

doi:10.15376/biores.10.2.2873-2887

Cited by 25 publications

(15 citation statements)

References 10 publications

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“…The evident effect of wood density ρ [ 54 , 55 ] can be compensated by normalizing values of resulting mechanical parameters [ 41 ]. Diverse algorithms can be implemented for the data unification and further non-biased interpretation.…”

Section: Resultsmentioning

confidence: 99%

Effect of the Drying Method of Pine and Beech Wood on Fracture Toughness and Shear Yield Stress

et al. 2020

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The modern wood converting processes consists of several stages and material drying belongs to the most influencing future performances of products. The procedure of drying wood is usually realized between subsequent sawing operations, affecting significantly cutting conditions and general properties of material. An alternative methodology for determination of mechanical properties (fracture toughness and shear yield stress) based on cutting process analysis is presented here. Two wood species (pine and beech) representing soft and hard woods were investigated with respect to four diverse drying methods used in industry. Fracture toughness and shear yield stress were determined directly from the cutting power signal that was recorded while frame sawing. An original procedure for compensation of the wood density variation is proposed to generalize mechanical properties of wood and allow direct comparison between species and drying methods. Noticeable differences of fracture toughness and shear yield stress values were found among all drying techniques and for both species, but only for beech wood the differences were statistically significant. These observations provide a new highlight on the understanding of the effect of thermo-hydro modification of wood on mechanical performance of structures. It can be also highly useful to optimize woodworking machines by properly adjusting cutting power requirements.

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Section: Resultsmentioning

confidence: 99%

Effect of the Drying Method of Pine and Beech Wood on Fracture Toughness and Shear Yield Stress

et al. 2020

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“…As reported by Kminiak and Gaff (2015), the average feed force in cross-cut sawing by a circular miter saw with manual operation of the saw blade ranges between 13 and 28 N. For the experiment, a feed force (Ff) of 20 N was used. In the experiment, the test specimens were split exactly in half by the reciprocating movement of the saw blade.…”

Section: Characteristics Of Experimentsmentioning

confidence: 99%

Cutting Power during Cross-Cutting of Selected Wood Species with a Circular Saw

Kminiak¹,

Kubš²

2016

BioResources

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This study assessed the effect of selected factors, such as the feed force (Ff = 15, 20, and 25 N), wood species (beech (Fagus sylvatica L.), English oak (Quercus robur L.), and spruce (Picea abies L.)), and the number of saw blade teeth (z = 24, 40, and 60) on cutting power in the cross-cutting of lumber. The cutting was done using a circular saw with a rotating motion of the saw blade at a constant cutting speed (vc) of 62 m.s -1 . The tangentially bucked lumber had a relative humidity (wr) of 12% ± 1% and a thickness (e) of 50 mm. For the experiment, four circular saw blades with SK plates, a uniform diameter (D = 250 mm), and identical angular geometry (angle of clearance (α) = 15°, wedge angle (β) = 60°, and rake angle (γ) = 15°) were used. The saw blades had a different number of teeth (z = 24, 40, and 60), and one saw blade had 24 teeth and a chip limiter. The aim of this study was to expand the knowledge about the resulting cutting performance with different combinations of technological process parameters.

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“…Wood is a renewable source of energy, and is used in various forms in everyday activities (Bekhtam et al 2014;Gaff et al 2016;Gottlöber et al 2016). Processing wood into a usable material is a very complex technological process that has a long history (Kminiak and Gaff 2015;Kubš et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Medium-density Fiberboard (MDF) and Edge-glued Panels (EGP) after Edge Milling - Surface Roughness after Machining with Different Parameters

Sedlecký¹,

Kvietková²,

Kminiak³

2018

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The mean arithmetic deviation of the roughness profile was investigated during cylindrical milling of the board edges. The machined materials were a medium-density fiberboard, medium-density fiberboard with single-sided lamination, and edge-glued spruce panel. Contactless and contact profilometers were used to measure the roughness. Both methods were evaluated and compared. Tungsten carbide blades with three different compositions and treatments were used. The effect of the cutting speed (20 m/s, 30 m/s, 40 m/s, and 60 m/s) and feed rate (4 m/min, 8 m/min, and 11 m/min) on the surface roughness was also monitored. The results of this study compared two different methods for determining the surface roughness. The measurements were more accurate with a contactless profilometer, but the price is higher than that of the contact method. The operation was also more complicated, and the measurement itself took longer with a contactless profilometer. The evaluation of individual surface quality variables was faster with a contact device. The best results in terms of the surface quality were achieved by lowering the feed rate and increasing the cutting speed.

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Roughness of Surface Created by Transversal Sawing of Spruce, Beech, and Oak Wood

Cited by 25 publications

References 10 publications

Effect of the Drying Method of Pine and Beech Wood on Fracture Toughness and Shear Yield Stress

Effect of the Drying Method of Pine and Beech Wood on Fracture Toughness and Shear Yield Stress

Cutting Power during Cross-Cutting of Selected Wood Species with a Circular Saw

Medium-density Fiberboard (MDF) and Edge-glued Panels (EGP) after Edge Milling - Surface Roughness after Machining with Different Parameters

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