This work presents the effect of steaming beech, birch and maple woods on resulting quality milled wood surface. The process studied results in a targeted change color wood, which changes from original light white-gray to fine reddish-brown dark brown shades that are more or less saturated depending temperature water steam. achieved during modification were identified using coordinates CIE L*a*b* space. described through total difference ΔE* defined classification grades scale. technological...

In the classical approach, energetic effects (cutting forces and cutting power) of wood sawing process are generally calculated on basis specific resistance, which is in case function more or less important factors. On other hand, (or power—more interesting from point view) could be considered a view modern fracture mechanics. Cutting may employed to determine not only toughness but also shear yield strength, then applied models. Furthermore, forecasting plane angle for models, include...

The enormous use of cutting fluid in machining leads to an increase costs, along with different health hazards. Cutting can be used efficiently using the MQL (minimum quantity lubrication) method, which aids improving performance. This paper contains multiple responses, namely, force, surface roughness, and temperature, so there arises a need for multicriteria optimization technique. Therefore, this paper, multiobjective based on ratio analysis (MOORA), VIseKriterijumska Optimizacija I...

Lightweight alloys made from aluminium are used to manufacture cars, trains and planes. The main parts most often manufactured thin sheets requiring the use of milling in manufacturing process front panels for control systems, housing electrical electronic components. As a result final phase process, cold rolling, residual stresses remain surface layers, which can influence cutting processes carried out on these materials. aim this study was verify whether strategy removing outer material...

The sound levels along with the cutting power registered during sawing process of impregnated and non-impregnated pine wood at two feed speeds are shown compared in this paper. Statistically significant differences acoustic signals occurred lower rate. became smaller an increase speed. In contrast to signal, were statistically only for higher addition, average electric main drive allowed identification knots process. Obtained results indicated that monitoring based on analysis can be used as...

Several properties of wood including the cutting power requirements can be correlated to density. Therefore, according literature, (and/or forces) could computed as a function specific gravity. This research shows that such an approach, based solely on gravity, may considered rather rough and imperfect estimate power. Samples Scots pine (Pinus sylvestris L.) from different provinces in Poland with varying densities were machined sash gang saw. The average force versus density (estimated...

The goal of this work is to investigate the impact thermal modification birch wood with saturated steam on particle size distribution sawing and milling process. Birch (Betula pendula Roth) an excellent source produce plywood boards. Wastes from mechanical processing are suitable composite materials. Granulometric analyses chips processes PRW 15M frame saw, as well 5-axis CNC machining centre SCM TECH Z5 AX320 Pinnacle, proved that more than 95% coarse medium chip fractions dimensions above...

Abstract In the classical approaches, used in Central Europe practice, cutting forces and power sawing processes of timber are commonly computed by means specific resistance k c . It needs to be highlighted that accessible sources handbooks scientific literature do not provide any data about wood provenance, nor conditions, which has been empirically determined. analyses processes, use a model with elements fracture mechanics involved is an alternative way. this work, predictions newly...

Arctic driftwood can be used as an alternative source of wood construction timber and furniture material, especially in Iceland Greenland. The use help the fight against climate change, by developing land reforestation processes reducing volume harvested from forests sustainability harvesting processes. In this paper results analysis effect long-term residence pine (Pinus sylvestris L.) larch (Larix sibirica stay ice seawater on granulation sawdust distribution fine dust particles during...

In this paper, absolute and density normalized cutting model parameters of natural impregnated Scots pine (Pinus sylvestris L.) are shown a method for the calculation their corresponding material properties in principal directions wood is presented. The were determined from measurements power on sash gang saw, detail fracture toughness shear yield strength wood. used fitting data calculating based minimum energy criterion originally developed to describe an orthogonal single tooth process...

The influence of cooling conditions and surface topography after finish turning Ti6Al4V titanium alloy on corrosion resistance bioactivity was analyzed. samples were machined under dry minimum quantity lubrication (MQL) to obtain different roughness. topographies the processed assessed measured using an optical profilometer. produced subjected electrochemical impedance spectroscopy (EIS) potential tests (Ecorr) in presence simulated body fluid (SBF). basis images from scanning electron...

Abstract The experimental results of the study focused on effect drying processes modified air and warm air-steam mixture pine beech wood size sawdust particles created in cutting using PRW-15M sash gang saw, are presented paper. Particle analysis dry was performed two methods—sieving method laser diffraction analysis. showed that process did not affect general particle distribution sawdust, but content very fine dust is many times higher when dried sawn at a feed per tooth 0.105 mm.

The wooden frame constructions are now popular in many developed countries of the world. Many these locations where such buildings constructed exposed to seismic and other shocks which generated by human activities. This paper discusses effect size location openings walls under dynamic loadings. Natural frequencies frames with without have been determined. Three 14 m high different widths, including 3, 6, 12 m, considered. Dynamic analysis has made using finite element method structural...

The rapid development of the building sector has created increased demand for novel materials and technologies, while on other hand resulting in generation a severe amount waste materials. Among these are polyurethane (PU) foams, which commonly applied as thermal insulation Their management is serious industrial problem, due to, example, their complex chemical composition. Although some thermochemical methods PU foam recycling known, broader use limited to requirements related complexity...

The latest progress in the field of optics and microelectronics resulted development new generation vision systems capable scanning surface topography with very high sampling frequencies. blue color illuminating light as well novel for controlling ultra-thin laser line thickness allows measurement porous wood a triangulation method. Three alternative sensors were tested here order to verify their suitability determination industrial environment. head was installed at exit zone four-side...

The modern wood converting processes consists of several stages and material drying belongs to the most influencing future performances products. procedure is usually realized between subsequent sawing operations, affecting significantly cutting conditions general properties material. An alternative methodology for determination mechanical (fracture toughness shear yield stress) based on process analysis presented here. Two species (pine beech) representing soft hard woods were investigated...

Wood drying is an important stage in the woodworking process. After drying, wood subject to a re-sawing process, for which high quality surface, low material loss, and efficiency are often required. In this paper, forecasted values were presented of cutting power process pine beech that dried with four different methods. Forecasting industrial band saw machine works daily Polish sawmill was determined. Values full range feed speeds analyzed machine. The achieved results allowed observation...

The experimental results of the study focused on effect drying processes warm air at temperature 6580°C and air-steam mixture 105°C pine beech wood to size sawdust grains created by cutting using RPW 15M frame saw is presented in paper. Particle analysis dry was performed two methods - screening method optical based image obtained from a microscope. showed that mode did not affect particle distribution sawdust, but dried with steam characterized finer particles.

The results of experimental research on the colour changes beech wood at different depths tested layer are presented. Beech (Fagus sylvatica L.) dried in a conventional kiln was tested. Half samples were steamed prior to drying process. Colour measured various after face milling process used remove material expose deeper surface. based three-axis CIELAB system, recommended by CIE (Comission Internationale de l'Eclairage) and according ISO 11664-2 11664-4 standards. As result analysis, four...

Cutting wood with circular saws is a popular machining operation in the woodworking and furniture industries. In latter sliding table (panel saws) are commonly used for cutting of medium density fiberboards (MDF), high (HDF), laminate veneer lumber (LVL), plywood chipboards different structures. The most demanded requirements machine tools accuracy precision, which mainly depend on static deformation dynamic behavior tool under variable forces. aim this study to present new holistic approach...

The thermal treatment of wood changes its structure due to the degradation polymers (cellulose, hemicellulose and lignin), so physical properties are either improved or degraded. Color apply not only natural wood, but also such composites for which some amount glue is used in their construction (e.g., plywood, blockboard laminboard). This article focused on analysis hornbeam field maple color influenced by drying temperature. Two types modes were used: hot-air mode where temperature...

In this paper the relationships between alternative machining paths and flatness deviations of aluminum plate part, were presented. The tolerance main surface part has crucial meaning due to assembly requirement piezoelectric elements on radiator. bodies under investigation are base radiators with crimped feathers for train industry. was milled using three different milling strategies: along longer or shorter side workpiece at an angle 45°. machined centre ecoMILL 70 DMG MORI. deviation...

The shrinking global forest area limits the supply of industrially usable raw resources. This, in combination with ever-increasing consumption timber due to population growth can lead lack a positive balance between annual volumetric and wood. An important innovation toward increasing environmental economic sustainability production is reduce volume wood residues by minimizing sawing kerf. It results higher material yield but may impact dimensional accuracy derived products. Therefore,...

In this paper the dependencies between face milling strategy of EN AW6082-T6 aluminum alloy samples, with difference thicknesses (6, 8, and 12 mm) two cold rolling directions, flatness deviations were presented. Three strategies included different proportions material removed from both sides plates. This approach allowed to control residual surface stresses on specimens, which created by process. The involving symmetrical removal sample resulted in best results deviations. was most effective...

The objective of this work was to evaluate the effect impregnation process pine wood (Pinus sylvestris L.) on roughness parameters surface processed a frame sawing. samples were dried and impregnated using commercial procedure by local company. touch method with use measuring stylus (pin) employed determine considering parameters, namely, arithmetical mean value (Ra), total height profile (Rt), maximum (Rz) root-mean-square (Rq). All measured values analysed normalised raw density in order...