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Автор: Grafiati
Опубліковано: 11 вересня 2023

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Статті в журналах з теми "ROUGHNESS OF BLOCKS OF WOOD"

1

Petersson, M. "Noise-related roughness of railway wheel treads-full-scale testing of brake blocks." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 214, no. 2 (March 1, 2000): 63–77. http://dx.doi.org/10.1243/0954409001531342.

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Results from full-scale tread braking experiments on an inertia dynamometer (brake testing machine) are presented. Eighteen prototypes of brake blocks are investigated. Two braking characteristics relating to the influence of the blocks on the wheel tread are studied: generation of hot spots and generation of roughness (corrugation, waviness). Wheel tread temperatures are measured during braking using an infrared (IR) technique. The wheel roughness is measured after each brake cycle when the wheel has cooled down. A roughness indicator, RλCA, relates measured roughness to expected rolling noise as generated by the wheel in operation. A correlation between the spatial distributions of temperatures and roughnesses is normally found: stronger for cast iron blocks and composition blocks and weaker for sinter blocks. The cast iron blocks are found to produce high tread roughness levels, partly owing to material transfer from brake block to wheel tread. The composition blocks are found to result in lower roughness levels than the cast iron blocks. Finally, the sinter metal blocks are found to lead to the lowest roughness levels, a fact which is probably due to the abrasive property of these blocks. Friction coefficients during braking are also measured.
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2

Jankowska, Agnieszka. "Understanding of surface roughness of wood based on analysis its structure and density." Annals of WULS, Forestry and Wood Technology 111 (September 30, 2020): 27–31. http://dx.doi.org/10.5604/01.3001.0014.6421.

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Understanding of surface roughness of wood based on analysis its structure and density. The main aim of presented paper was to investigate the influence the wood density and anatomical details on surface roughness. The scope of study included samples from ten different species of wood (mainly tropical) because of wide range of density and anatomical difference. The results allow to conclude that the roughness of tested wood species demonstrated variation, depending on the wood section and the measurement direction. In general, radial sections showed higher roughness than tangential sections due to interlocked fibres in tested wood species (fibres cut in various ways on the radial section of the wood). Roughness measured perpendicular to the wood fibres were twice as high as those measured parallel to the grain. Wood density was not an important indicator determining surface roughness for tested wood species. The determining element for the roughness measured across the fibres was the diameter of the vessels. Further research is advisable due to the enormous variability of the structure and properties of wood.
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3

Jankowska, Agnieszka. "Understanding of surface roughness of wood based on analysis its structure and density." Annals of WULS, Forestry and Wood Technology 111 (September 30, 2020): 27–31. http://dx.doi.org/10.5604/01.3001.0014.6421.

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Анотація:
Understanding of surface roughness of wood based on analysis its structure and density. The main aim of presented paper was to investigate the influence the wood density and anatomical details on surface roughness. The scope of study included samples from ten different species of wood (mainly tropical) because of wide range of density and anatomical difference. The results allow to conclude that the roughness of tested wood species demonstrated variation, depending on the wood section and the measurement direction. In general, radial sections showed higher roughness than tangential sections due to interlocked fibres in tested wood species (fibres cut in various ways on the radial section of the wood). Roughness measured perpendicular to the wood fibres were twice as high as those measured parallel to the grain. Wood density was not an important indicator determining surface roughness for tested wood species. The determining element for the roughness measured across the fibres was the diameter of the vessels. Further research is advisable due to the enormous variability of the structure and properties of wood.
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4

Ozdemir, Turgay, Ali Temiz, and Ismail Aydin. "Effect of Wood Preservatives on Surface Properties of Coated Wood." Advances in Materials Science and Engineering 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/631835.

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Анотація:
Effect of wood preservatives (waterborne and organicborne) on the performance of surface finishing properties is investigated. Sapwood of scots pine, (Pinus sylvestrisL.), oriental beech (Fagus orientalisLipsky), and chestnut (Castanea sativaMill.) specimens (300 × 100 × 15 mm along the grain) were impregnated with aqueous solution of 2% CCA, 2% Tanalith E, 1% boric acid, and Immersol aqua. Surface roughness, dry film thickness, adhesion strength, gloss measurement, scratch, and abrasion resistance were determined according to related standards for treated and untreated samples. The results indicated that surface roughness and adhesion strength depended on wood species and the chemical composition of preservatives. Generally, waterborne wood preservatives increased the surface roughness of wood while the organic-based wood preservatives decreased it. The organic-based wood preservatives decreased adhesion but they increased gloss value. Wood preservatives did not affect the scratch resistance which was found to depend on properties of the coating. All the wood preservatives increased abrasion resistance.
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5

Evans, Mary Ellen. "Philip Hagreen's Missing Wood Blocks." Chesterton Review 20, no. 2 (1994): 427–28. http://dx.doi.org/10.5840/chesterton1994202/3138.

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6

Gurau, Lidia. "Testing the Processing-Induced Roughness of Sanded Wood Surfaces Separated from Wood Anatomical Structure." Forests 13, no. 2 (February 17, 2022): 331. http://dx.doi.org/10.3390/f13020331.

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Анотація:
The metrology of processed wood surfaces is complex due to the presence of wood anatomical cavities, which are a factor of bias in several metrological steps, from the measuring to the evaluation of the surface quality. Wood requires special recommendations, and one regards the use of a robust Gaussian regression filter for filtering the roughness. The filter was previously tested with success on wood surfaces and was used in this paper. Furthermore, a reliable quantification of the processing roughness requires that independent wood anatomical data be removed from the evaluation. The paper presents a method of separating the roughness induced by processing from the wood anatomical structure. It was tested on different wood species, sanded with various grit sizes, and on a plastic material included for comparisons. The results showed similar values of the processing roughness for materials sanded with the same grit size, in spite of their different structures. The method could further be used for optimization of processing parameters at sanding.
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7

Lunguleasa, Aurel, and Cosmin Spirchez. "Experiments about Roughness of Wood Composites." RECENT - REzultatele CErcetărilor Noastre Tehnice 21, no. 1 (August 24, 2020): 13–18. http://dx.doi.org/10.31926/recent.2020.60.013.

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8

Gurau, L., H. Mansfield-Williams, and M. Irle. "Processing roughness of sanded wood surfaces." Holz als Roh- und Werkstoff 63, no. 1 (November 26, 2004): 43–52. http://dx.doi.org/10.1007/s00107-004-0524-8.

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9

Tan, P. L., Safian Sharif, and Izman Sudin. "Roughness models for sanded wood surfaces." Wood Science and Technology 46, no. 1-3 (October 6, 2010): 129–42. http://dx.doi.org/10.1007/s00226-010-0382-y.

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10

Kúdela, Jozef, Leoš Mrenica, Igor Čunderlík, and Pavel Šmíra. "Morphological Changes on Spruce Wood Surface, Induced by Treatment with Dry Ice." Materials Science Forum 818 (May 2015): 177–80. http://dx.doi.org/10.4028/www.scientific.net/msf.818.177.

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Анотація:
This work concerns the changes to wood surface morphology induced by surface cleaning with dry ice. The surface roughness values demonstrated that the surface treatment with dry ice resulted in amplified surface roughness, mainly due to the increase in the roughness of early wood. The treatment of old wood with dry ice not only guarantees effective removal of contamination from the wood surface, it also induces positive changes in other (such as wettability, surface free energy, color, and similar). This way of wood surface treatment guarantees more wood surface quality for the surface treatment, impregnation or gluing.
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Більше джерел

Дисертації з теми "ROUGHNESS OF BLOCKS OF WOOD"

1

Fujiwara, Yuko. "Evaluation of wood surface roughness as related to tactile roughness." Kyoto University, 2004. http://hdl.handle.net/2433/145425.

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Анотація:
Kyoto University (京都大学)
0048
新制・課程博士
博士(農学)
甲第11112号
農博第1442号
新制||農||898(附属図書館)
学位論文||H16||N3962(農学部図書室)
22662
UT51-2004-L909
京都大学大学院農学研究科森林科学専攻
(主査)教授 奥村 正悟, 教授 増田 稔, 教授 池田 善郎
学位規則第4条第1項該当
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2

Gurau, Lidia. "The roughness of sanded wood surfaces." Thesis, Brunel University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399646.

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3

Yang, Hongta. "Fundamentals, preparation, and characterization of superhydrophobic wood fiber products." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24796.

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Анотація:
Thesis (M. S.)--Chemical Engineering, Georgia Institute of Technology, 2008.
Committee Chair: Yulin Deng; Committee Member: Jeffery S. Hsieh; Committee Member: Sujit Banerjee; Committee Member: Zhong Lin Wang.
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4

Tiburcio, Ulisses Frazão de Oliveira. "Medição e análise do acabamento superficial da madeira de eucalipto na usinagem de torneamento cilínrico e lixamento /." Guaratinguetá : [s.n.], 2009. http://hdl.handle.net/11449/103752.

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Анотація:
Resumo: O processo de lixamento da madeira é uma prática comum para preparar sua superfície para o revestimento. A qualidade superficial da madeira é diretamente relacionada ao revestimento, aderência, custos de pós processamento e aparência estética do produto. Vários parâmetros influenciam no acabamento superficial da madeira como: espécie de madeira, processo de usinagem e granulometria da lixa. Nesta tese foram coletados dados de rugosidade superficial de amostras das espécies Eucalyptus grandis e Eucalyptus citriodora usinadas em torno tubular em três velocidades de avanço (10, 14 e 18m/min.) e lixadas em lixadeira de cinta vertical dupla por quatro jogos de lixas abrasivas de alumínio zirconado. Estes jogos foram compostos com lixas de granulometrias 80, 100 e 120 (80-100, 80-120, 100-120 e U80-120), sendo a primeira lixa para desbaste e a segunda para acabamento. Concluiu-se que para os três conjuntos de lixas novas empregadas, o conjunto de lixas de granulometrias 80 e 120, para desbaste e acabamento, respectivamente, foi aquele que apresentou o melhor desempenho quanto ao acabamento superficial para as duas espécies. O emprego de lixas usadas não demonstrou perda significativa de rendimento se comparadas às demais combinações de lixas novas. O conjunto de lixas 80-120 apresenta, numa razão proporcional, uma variação de 4% no valor de "Ra" para cada 4 m/min aumentado na velocidade de avanço do torneamento das amostras. Pode-se afirmar que, em condições ótimas de lixamento, em média, a cada 0,1mm/rot de aumento no avanço por dente no torneamento, tem-se o aumento de 1% em "Ra".
Abstract: The process of sanding the wood is a common practice to prepare the surface for coating. The surface quality of wood is directly related to the coating, adhesion, costs of post-processing and aesthetic appearance of the product. Several parameters influence the surface finish of the wood as wood species, machining process and particle size of sandpaper. In this thesis the analysis was based on data collected in surface roughness of samples of species Eucalyptus grandis and Eucalyptus citriodora machined in tubiform lathe three feed rate (10, 14 and 18m/min.) and sanded in double vertical belt sander by and four sets of abrasive zirconia aluminium. These sets were composed with grain sizes 80,100 and 120 mesh (80-100, 80-120, 100-120 e U80- 120), the first sandpaper for roughing and second for finishing. It was concluded that for the three new sets of sandpaper used, the combination of grit sizes of 80 and 120, for roughing and finishing, respectively, presented the best performance on the surface finishing for both species. The use of worn sandpaper showed no significant loss of income compared to the other combinations of new sandpaper. The set of sandpaper 80-120 provides, in proportion to a variation of 4% in the value of "Ra" for each 4 m/min increased the feed rate speed of the turning of the samples. Thus, can be conclude that, under optimal conditions of sanding, on average, every 0.1 mm/rev increased in feed per tooth, increases of 1% in "Ra".
Orientador: Marcos Valério Ribeiro
Coorientador: Marcos Tadeu Tiburcio Gonçalves
Banca: Manoel Cleber de Sampaio Alves
Banca: Edson Cocchieri Botelho
Banca: Ivaldo de Domenico Valarelli
Banca: Francisco Antonio Rocco Lahr
Doutor
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5

Lundberg, Staffan. "Experimental investigations in wood machining related to cutting forces, sawdust gluing, and surface roughness." Licentiate thesis, Luleå tekniska universitet, Matematiska vetenskaper, 1994. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17499.

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6

Tiburcio, Ulisses Frazão de Oliveira [UNESP]. "Medição e análise do acabamento superficial da madeira de eucalipto na usinagem de torneamento cilínrico e lixamento." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/103752.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O processo de lixamento da madeira é uma prática comum para preparar sua superfície para o revestimento. A qualidade superficial da madeira é diretamente relacionada ao revestimento, aderência, custos de pós processamento e aparência estética do produto. Vários parâmetros influenciam no acabamento superficial da madeira como: espécie de madeira, processo de usinagem e granulometria da lixa. Nesta tese foram coletados dados de rugosidade superficial de amostras das espécies Eucalyptus grandis e Eucalyptus citriodora usinadas em torno tubular em três velocidades de avanço (10, 14 e 18m/min.) e lixadas em lixadeira de cinta vertical dupla por quatro jogos de lixas abrasivas de alumínio zirconado. Estes jogos foram compostos com lixas de granulometrias 80, 100 e 120 (80-100, 80-120, 100-120 e U80-120), sendo a primeira lixa para desbaste e a segunda para acabamento. Concluiu-se que para os três conjuntos de lixas novas empregadas, o conjunto de lixas de granulometrias 80 e 120, para desbaste e acabamento, respectivamente, foi aquele que apresentou o melhor desempenho quanto ao acabamento superficial para as duas espécies. O emprego de lixas usadas não demonstrou perda significativa de rendimento se comparadas às demais combinações de lixas novas. O conjunto de lixas 80-120 apresenta, numa razão proporcional, uma variação de 4% no valor de “Ra” para cada 4 m/min aumentado na velocidade de avanço do torneamento das amostras. Pode-se afirmar que, em condições ótimas de lixamento, em média, a cada 0,1mm/rot de aumento no avanço por dente no torneamento, tem-se o aumento de 1% em “Ra”.
The process of sanding the wood is a common practice to prepare the surface for coating. The surface quality of wood is directly related to the coating, adhesion, costs of post-processing and aesthetic appearance of the product. Several parameters influence the surface finish of the wood as wood species, machining process and particle size of sandpaper. In this thesis the analysis was based on data collected in surface roughness of samples of species Eucalyptus grandis and Eucalyptus citriodora machined in tubiform lathe three feed rate (10, 14 and 18m/min.) and sanded in double vertical belt sander by and four sets of abrasive zirconia aluminium. These sets were composed with grain sizes 80,100 and 120 mesh (80-100, 80-120, 100-120 e U80- 120), the first sandpaper for roughing and second for finishing. It was concluded that for the three new sets of sandpaper used, the combination of grit sizes of 80 and 120, for roughing and finishing, respectively, presented the best performance on the surface finishing for both species. The use of worn sandpaper showed no significant loss of income compared to the other combinations of new sandpaper. The set of sandpaper 80-120 provides, in proportion to a variation of 4% in the value of Ra for each 4 m/min increased the feed rate speed of the turning of the samples. Thus, can be conclude that, under optimal conditions of sanding, on average, every 0.1 mm/rev increased in feed per tooth, increases of 1% in Ra.
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7

Alarousu, E. (Erkki). "Low coherence interferometry and optical coherence tomography in paper measurements." Doctoral thesis, University of Oulu, 2006. http://urn.fi/urn:isbn:9514282140.

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Abstract This thesis describes the application of Low Coherence Interferometry (LCI) and Optical Coherence Tomography (OCT) in paper measurements. The developed measurement system is a combination of a profilometer and a tomographic imaging device, which makes the construction versatile and applicable in several paper measurement applications. The developed system was first used to measure the surface structure of paper. Different grades of paper were selected to provide maximum variation in surface structure. The results show that the developed system is capable of measuring grades of paper from rough base paper to highly coated photo printing paper. To evaluate the developed system in surface characterization, the roughness parameters of five laboratory-made paper samples measured with the developed system and with a commercial optical profilometer were compared. A linear correlation was found with roughness parameters Ra and Rq. Next, the surface quality of paper was evaluated using LCI, a Diffractive Optical Element Based Glossmeter (DOG), and a commercial glossmeter. The results show linear correlation between Ra and gloss measured with the commercial glossmeter. The roughness Ra and averaged gloss measured with the DOG didn't give such a correlation, but a combination of these techniques provided local properties of gloss and surface structure, which can be used to evaluate the local surface properties of paper. In the next study, determination of the filler content of paper using OCT is discussed. The measurement results show clear correspondence of the slope of the averaged logarithmic fringe signal envelope and the filler content. The last studies focus on 2D and 3D imaging of paper using OCT and begin with imaging of a self-made wood fiber network. The visibility of the fibers was clear. Next, several refractive index matcing agents are studied by means of light transmittance and OCT measurements to find the best possible agent for enhancing the imaging depth of OCT in paper. Benzyl alcohol was found to have the best possible combination of optical, evaporation, and sorption characteristics, and it is applied in 2D and 3D visualizations of copy paper.
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8

Guénette, Maryse. "Wood blocks as a carrier for Saccharomyces cerevisiae cells used in the production of fructose and ethanol." Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6479.

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Saccharmoyces cerevisiae ATCC 39859 was immobilized onto small cubes of wood in order to produce very enriched fructose syrup from synthetic glucose/fructose mixtures, through the selective fermentation of glucose. The kinetics of growth and ethanol production rates were measured. Several tests to assess the influence of substrate and product concentration on the production rates were carried out and appropriate rate equations were proposed as a design basis for continuous immobilized reactors. The growth and ethanol production rates were found to be inhibited linearly by both substrate and product concentrations. A maximum ethanol productivity of 21.9 g/Lh was attained from a feed containing 10% (w/v) glucose and 10% (w/v) fructose. The ethanol concentration was 29.6 g/L, the glucose conversion was 78% and a fructose yield of 99% was obtained. This resulted in a fructose/glucose ratio of 2.7. At lower ethanol productivity levels the fructose/glucose ratio increases, as does the ethanol concentration in the effluent. The addition of oleic acid, which is known as an anaerobic growth factor, increased the productivity by 13%. The effect of reactor temperature on production rate was studied. Ethanol productivity peaked at 32.6$\sp\circ$C and approached zero near 44$\sp\circ$C. Batch fermentations were carried out using the reactor effluent in an attempt to enhance the ethanol concentration in the effluent from the reactor. The productivity of these processes was not very high due to the low biomass concentration leaving the reactor. The addition of yeast extract or active biomass increased the productivity substantially. The immobilized cell bioreactor was also used to produce sorbitol continuously from fructose. Sorbitol is a polyol which is used as a sweetening agent for diabetics. It is also used in pharmaceutical, foods and chemical industry. A maximum productivity of 3.25 g/Lh was attained from a 133.8 g/L fructose feed, with a fructose conversion of 44%. (Abstract shortened by UMI.)
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9

Rahayu-Sekartiing, Istie. "Characteristics of lathe check and surface roughness of fast growing wood veneers and their performance on laminated veneer lumber." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0034/document.

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Pour répondre à la demande croissante de bois et pour préserver les forêts primaires, les méthodes de sylviculture les plus dynamiques ont été privilégiées de manière générale sur la planète.. Les objectifs de la recherche étaient 1) déterminer le point de démarcation/ âge de transition entre le bois juvénile et le bois mature sur sengon (Falcataria moluccana), jabon(Anthocephalus cadamba Miq.), peuplier (Populus sp) et douglas (Psedotsuga menziesii); 2) analyser l'effet de la juvénilité sur un fissuration cyclique, la rugosité et de mouillage; 3) analyser l'effet de la fissuration cyclique et juvénilité sur la résistance à l'adhérence de la colle et les propriétés mécaniques du LVL en flexion; et 4) appliquer un nouveau modèle analytique pour estimer la variation du module d'élasticité du lamibois (sengon et jabon) depuis la moelle vers l'écorce. A partir de la longueur des fibres, le point de démarcation entre le bois juvénile et le bois mature ont été estimés. Pour les essences sengon and jabon, les placages obtenus à partir du cœur des arbres, réputés juvéniles, sont plus fissurés plus rugueux et avec une haute mouillabilité comparativement à ceux obtenus à partir du bois près de l’écorce (plus mature). Une phase d’étuvage préliminaire des bois dans un bain d’eau chaude à 75°C pendant 4 heures a permis d’améliorer sensiblement la qualité des placages en diminuant la fissuration, la rugosité et s’accompagne d’une augmentation de la mouillabilité. La résistance à l'adhérence de la colle, et les modules élastiques et de rupture spécifiques (SMOE et SMOR) du LVL (jabon et sengon) diminuent à mesure que la fréquence de fissure augmente ou en partant de l'écorce vers la moelle. L'avantage de l'utilisation de placages en peuplier de bois mature a été prouvé avec une amélioration de 15 à 20% en moyenne pour les propriétés mécaniques, pour un poids de panneau comparable. Pour le douglas, l'utilisation de placages de bois mature dans la constitution des panneaux de LVL permet également d’améliorer les performances en flexion (de 7 à 22 % sur el MOR). Le modèle analytique a été utilisé afin de prédire les variations du module élastique allant de la moelle à l’écorce. Il permet à partir d’un grand nombre de combinaisons d’estimer le potentiel issu d’une ressource donnée. Pour le contexte de l’étude qui représente bien le potentiel sylvicole de l’Indonésie, la proportion de bois juvénile étant quasi-totale (100%), l’action de trier les placages n’est pas apparue comme pertinente
The development of plantation and community forest to meet wood demand in society has produced fast growing wood species. The research objectives were 1) to determine demarcation point/transition age between juvenile and mature wood on sengon (Falcataria moluccana), jabon (Anthocephalus cadamba Miq.), poplar (Populus sp) and douglas fir (Psedotsuga menzii); 2) to analyze the effect of juvenility on lathe check, surface roughness and wettability; 3) to analyze the effect of lathe check and juvenility on glue bond strength and laminated veneer lumber (LVL) bending properties; and 4) to apply a new analytical model to determine the variation of specific MOE LVL values of sengon and jabon from pith to bark. Based on fiber length trait, the demarcation point between juvenile and mature wood were approximately at segmented rings 17th (sengon) and at segmented ring 24th (jabon). While, transition age of poplar cultivars and douglas-fir, transition age happened approximately at 12 years old and 18 years old, respectively. The results showed that wood near pith on sengon and jabon resulted veneers with higher lathe check, rougher surface and high wettability, while wood near bark resulted veneers with lower lathe check, smoother surface and low wettability. Glue bond strength, Specific MOE (SMOE) and Specific MOR (Modulus of Rupture) of sengon and jabon LVL were decreased as the frequency of lathe check increased or those strength values increased from pith to bark. The advantage of using poplar veneers from mature wood was proved with an improvement of 15 to 20% on average for mechanical properties, while for douglas-fir, was 7 to 22%. An analytical model was used to predict the variation of the LVL mechanical characteristics using different scenarios. According to the context of this study assumed to be close to the Indonesian resource there is no need to sort veneers since most of the tree is juvenile wood for logs no older than 7
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Leite, Sueli Souza [UNESP]. "Avaliação de desempenho no processo de lixamento de madeiras das espécies Pinus elliottii e Corymbia citriodora." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/137956.

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O lixamento da madeira envolve inúmeras variáveis as quais influenciam na qualidade superficial da peça produzida, tornando-se por isso, um processo complexo. Atua de forma imprescindível nas indústrias, principalmente fabricantes de móveis, painéis, molduras, esquadrias e dentre outras. Entretanto, é tratado de forma empírica, prejudicando a qualidade do produto e elevando os custos de produção, visto que é, um dos processamentos mais caros na indústria de madeira. Sabido disto, este trabalho, teve por objetivo combinar um conjunto de fatores para padronizar o processo de lixamento. Para isto, seguiu o planejamento experimental de Taguchi, método baseado em conceitos estatísticos, responsável por diagnosticar o conjunto de fatores que propiciam o alcance da qualidade do produto final. A experimentação realizou-se em relação a uma matriz ortogonal L8, criando assim, oito condições diferentes de lixamento, repetindo-as três vezes cada, totalizando em 24 ensaios. Variou os níveis dos seguintes fatores: granulometria, grão abrasivo, sentido do lixamento e espécie da madeira, com o intuito de analisar o comportamento dos parâmetros: emissão sonora, potência, rugosidade, taxa de remoção e temperatura no decorrer do processo. Por meio da análise de variância (ANOVA), concluiu-se que o comportamento dos parâmetros foram influênciados pelos fatores estipulados, os quais interferiram na qualidade superficial da madeira.
The sanding of wood involves numerous variables which influence the surface quality of the produced piece, becoming therefore a complex process. It is a crucial process in industries, particularly manufacturers such as furniture, panels, moldings, frames and others. However, the process is trated empirically, decreasing the product quality and increasing production costs, since it is one of the most expensive processes in the wood industry. According to this, this paper, aimed to standardize a set of factors to achieve the best surface finish of the wood. For this, the following experimental design Taguchi method based on statistical concepts, responsible for diagnosing the set of factors that promote the achievement of the quality of the final product. The experiment was performed in relation to a matrix L8 orthogonal matrix, creating eight different conditions sanding, repeating three times each, totaling in 24 trials. Varied levels of the following factors: particle size, abrasive grain, sense of sanding and timber species, in order to analyze the parameters of behavior, noise emission, power, roughness, temperature and removal rate in the process. Through analysis of variance (ANOVA), it was concluded that the behavior parameters were influenced by prescribed factors which interfere in the surface quality of the wood.
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Книги з теми "ROUGHNESS OF BLOCKS OF WOOD"

1

Wood blocks. New York: Rosen Publishing Group, Inc., 2015.

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2

Pellew, Claughton. Claughton Pellew: Five wood engravings printed from the original blocks. Wakefield: Fleece Press, 1987.

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Pellew, Claughton. Claughton Pellew: Five wood engravings printed from the original blocks. Wakefield: Fleece, 1987.

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1940-, Williams Graham, ed. Naum Gabo monoprints from engraved wood blocks and stencils. Biddenden, Ashford, Kent, England: Florin Press for Kettle's Yard, Cambridge & Talbot Rice Gallery, Edinburgh, 1987.

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C, DeGroot Rodney, United States. Federal Highway Administration., and Forest Products Laboratory (U.S.), eds. Soil-contact decay tests using small blocks: A procedural analysis. [Madison, Wis.]: U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1998.

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Laufenberg, Theodore. Improving engineered wood fiber surfaces for accessible playgrounds. Madison, WI: U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 2003.

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Laufenberg, Theodore. Improving engineered wood fiber surfaces for accessible playgrounds. Madison, WI: U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 2003.

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8

The ultimate wood block book: Building castles, bridges & other engineering marvels. New York: Sterling, 1988.

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Rogerson, Ian. The John Farleigh Collection: A description of the books, ephemera, archival papers and wood blocks held in the Manchester Metropolitan University Library. Manchester: Manchester Metropolitan University Library, 1993.

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Ch'aekp'an Chosŏn ŭi munhwa rŭl saegida: Carving the culture of Joseon in wood printing blocks. Sŏul T'ŭkpyŏlsi: Kyujanggak Han'gukhak Yŏn'guwŏn, 2017.

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Частини книг з теми "ROUGHNESS OF BLOCKS OF WOOD"

1

Csanády, Etele, and Endre Magoss. "Surface Roughness." In Mechanics of Wood Machining, 211–75. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51481-5_8.

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Csanády, Etele, and Endre Magoss. "Surface Roughness." In Mechanics of Wood Machining, 167–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-29955-1_8.

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Csanády, Etele, Endre Magoss, and László Tolvaj. "Surface Roughness of Wood." In Quality of Machined Wood Surfaces, 183–236. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-22419-0_4.

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Iglesias, Fabián, Alfredo Aguilera, Arturo Padilla, Matías Madaf, and Eduardo Diez. "Optical Evaluation of Surface Roughness in Wood Parts Processed by Robotic Sanding." In Proceedings of the XV Ibero-American Congress of Mechanical Engineering, 355–61. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-38563-6_52.

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AbstractSurface roughness is an essential property in the manufacturing industry to assess the quality of its products after finishing operations. However, the evaluation of surface quality in wood products usually depends on the subjective inspection of the operators, which implies a high variability in the final quality of the pieces. This study proposes a new method to estimate roughness parameters by applying algorithms on images of wood parts processed by robotic sanding. For this purpose, this article presents a hybrid approach based on features using the co-occurrence matrix applied to greyscale images processed with five edge detection algorithms. For the evaluation of the performance of this method, the researchers correlated five features for each edge detection algorithm with standard surface roughness parameters, obtaining high correlations. The results of this study constitute a first step in implementing the proposed method in inspection systems for optical roughness measurement of wood products in automated industrial environments.
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Oguma, Kouhei, Hiroshi Matsushita, Takayuki Hirayama, Hiroyuki Kawamura, Tomohiro Yasuda, and Hajime Mase. "Roughness Factor of Two Type Wave-Dissipating Blocks Estimated by Overtopping Experiments." In APAC 2019, 137–43. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0291-0_20.

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6

Zajac, J., F. Botko, S. Radchenko, P. Radič, A. Bernat, J. Roman, and B. Zajac. "Evaluation of Roughness Parameters of Machined Surface of Selected Wood Plastic Composite." In Smart Technology Trends in Industrial and Business Management, 345–52. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-76998-1_25.

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Kilinçarslan, Şemsettin, Yasemin Şimşek Türker, and Murat İnce. "Prediction of Heat-Treated Spruce Wood Surface Roughness with Artificial Neural Network and Random Forest Algorithm." In Trends in Data Engineering Methods for Intelligent Systems, 439–45. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-79357-9_43.

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Ibrišević, Alen, Ibrahim Busuladžić, Murčo Obućina, and Seid Hajdarević. "Influence of Different Cutting Speeds on CNC Milling on Surface Roughness of Objects Made from Steamed and Heat-Treated Beech Wood." In Lecture Notes in Networks and Systems, 501–8. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-43056-5_37.

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Ahn, Tae Shik, Dae Hyun Cho, and Young Ze Lee. "Evaluation of Friction Force, Wear Volume and Scuffing Life of Piston Rings and Cylinder Blocks with Different Surface Roughness for Low Friction Diesel Engine." In The Mechanical Behavior of Materials X, 713–16. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-440-5.713.

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Di Cosmo, Lucio, and Patrizia Gasparini. "Forest Management and Productive Function." In Springer Tracts in Civil Engineering, 327–89. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-98678-0_8.

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AbstractForestry originated as a science under the need to manage forests for timber production in a sustainable way. Since then, sustainability has been broadened to include a variety of values and services recognised as important for human well-being, while at maintaining a relevant productive function. Hence, silviculture exists as a need of humankind and not as a need of forests for their continued existence. Sustainability is obtained by adopting correct silvicultural practices and adjusting the planning in view of the most suitable management able to ensure the goals, for example, carbon balance under climate warming scenarios. National forest inventories provide reliable information that is needed for effective forest policies. This chapter shows area estimates on some variables important for production, such as forest accessibility, presence of roads or tracks, terrain roughness and availability for wood supply (Sect. 8.2). Silviculture practices are actualised by forest utilisation modes, which are also related to timber logging modes. Section 8.3 shows the statistics on these variables as well as those on the growing stock and the biomass annually removed from the forest. Section 8.4 shows the estimates on presence of forest planning or regulations that influence productive aspects of forests. The type of planning may vary consistently due to overlapping authorities protecting forests in Italy, so the presence of planning at different levels was emphasised.
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Тези доповідей конференцій з теми "ROUGHNESS OF BLOCKS OF WOOD"

1

Zhao, Xuezeng. "Inspecting wood surface roughness using computer vision." In Photonics for Industrial Applications, edited by George E. Meyer and James A. DeShazer. SPIE, 1995. http://dx.doi.org/10.1117/12.198860.

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Виктор Александрович, Романов,, Пущаенко, Фёдор Геннадьевич, Морозов, Даниил Викторович, Никишова, Елизавета Дмитриевна, and Нелюбин, Владимир Владимирович. "INVESTIGATION OF THE ROUGHNESS OF ARTIFICIALLY AGED WOOD." In Научные исследования в современном мире. Теория и практика: сборник статей международной научной конференции (Санкт-Петербург, Ноябрь 2022). Crossref, 2022. http://dx.doi.org/10.37539/221107.2022.15.64.003.

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Рассмотрена методика расчета шероховатости поверхности для искусственно состаренной древесины. Проведены исследования образцов, с разным качеством поверхности. The method of calculating the surface roughness for artificially aged wood is considered. The samples with different surface quality were studied.
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Qing, L., Z. F. Li, and D. Xing. "Study on Evaluation Method of Surface Roughness of Wood Processing." In The International Workshop on Materials, Chemistry and Engineering. SCITEPRESS - Science and Technology Publications, 2018. http://dx.doi.org/10.5220/0007434900830092.

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Lichtblau, Florian. "Blocks of Flats from 1958, Rejuvenated with Wood in 2012/ 14." In EuroSun2016. Freiburg, Germany: International Solar Energy Society, 2016. http://dx.doi.org/10.18086/eurosun.2016.01.11.

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Yang, Tiebin, Wei Xue, and Yixing Liu. "Influence of machining methods on wood surface roughness and adhesion strength." In 2012 International Conference on Biobase Material Science and Engineering (BMSE). IEEE, 2012. http://dx.doi.org/10.1109/bmse.2012.6466231.

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Liu, Yana, Zhong Yang, Bin Lv, and Maomao Zhang. "Effect of surface roughness on near infrared models for wood density analysis." In 2012 International Conference on Biobase Material Science and Engineering (BMSE). IEEE, 2012. http://dx.doi.org/10.1109/bmse.2012.6466184.

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Tamura, Tetsuro, Shuyang Cao, Makoto Tsubokura, Yudai Tateyama, and Takahito Inaba. "LES ANARYSIS ON DISPERSION IN SURFACE LAYER OVER RANDOMLY ARRANGED ROUGHNESS BLOCKS." In Third Symposium on Turbulence and Shear Flow Phenomena. Connecticut: Begellhouse, 2003. http://dx.doi.org/10.1615/tsfp3.600.

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Doersch, Stefan, Maria Starnberg, and Haike Brick. "Acoustic Certification of New Composite Brake Blocks." In EuroBrake 2021. FISITA, 2021. http://dx.doi.org/10.46720/1766833eb2021-stp-022.

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In the latest amendment to the TSI Noise, the Commission Implementing Regulation (EU) 2019/774 from year 2019 (TSI NOI EU 2019/774, 2019), the term “quieter brake blocks” was introduced. The purpose was to distinguish between brake blocks that cause a high rolling noise level by roughening the surface of the wheels and quieter brake blocks with acoustic properties that better correspond to the pass-by noise limit for freight wagons. However, it has remained an open point which methods and procedures should be used for the assessment of the acoustic properties of new brake blocks. This open point shall be closed in the new revision of the TSI Noise, which will become effective in year 2022. It requires a new acoustic certification procedure for brake blocks to be developed. A new procedure for the acoustic certification of new brake blocks should be reliable, easy to use and less expensive in terms of time and costs than full scale pass-by noise measurements in field. These conditions could be fulfilled by a certification procedure based on the wheel roughness level caused by the specific brake block. The relationship to the TSI-noise limit value can be established by defining reference values for the rail roughness and transfer function according to the well-established rolling noise model. Besides the certification procedure, a practical method should be defined how to generate and assess the wheel roughness that is characteristic for a specific brake block product. This project is financed by the German Centre for Rail Traffic Research in cooperation with the Federal Railway Authority and executed by DB Systemtechnik GmbH. The objective of the presentation is to introduce the research project “Acoustic Certification of New Composite Brake Blocks”. This presentation summarizes the project work so far and gives explanations and background knowledge to the development of the methods as well as to railway noise. A calculation example is given to comprehensibly demonstrate the proposed procedure. At the time of the EuroBrake conference the project is still ongoing, and the final results cannot yet be presented. The focus for the discussions is to put on the practicability of the methods and the needs of the user regarding for instance documentation, required efforts or material and qualification.
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Funck, James W., Johannes B. Forrer, David A. Butler, Charles C. Brunner, and Alberto G. Maristany. "Measuring surface roughness on wood: a comparison of laser-scatter and stylus-tracing approaches." In Applications in Optical Science and Engineering, edited by Gordon M. Brown, Kevin G. Harding, and H. Philip Stahl. SPIE, 1993. http://dx.doi.org/10.1117/12.145533.

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Lin, Hsien-I., and Cheng-Chi Wang. "Roughness Measurement of Polished Beech Wood by a Robotic Arm with a Laser Rangefinder." In 2022 International Conference on System Science and Engineering (ICSSE). IEEE, 2022. http://dx.doi.org/10.1109/icsse55923.2022.9948243.

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