Relevant bibliographies by topics / Sawing

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Sawing'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 January 2023

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Journal articles on the topic "Sawing"

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Jiang, Bo, Jian Yun Shen, and Xi Peng Xu. "Study on Force Characteristics for High Speed Sawing of Quartz Glass with Diamond Blade." Materials Science Forum 800-801 (July 2014): 144–49. http://dx.doi.org/10.4028/www.scientific.net/msf.800-801.144.

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High speed sawing is an advanced machining technique for sawing of brittle materials with good component quality and high productivity. In the paper, sawing experiments were carried out to investigate the characteristics of sawing forces by altering many processing parameters in high speed sawing of quartz glass with a diamond blade. The sawing forces and force ratio were analyzed. The conclusions present that in the fixed material removal rate, the increasing of periphery speed can help to lower sawing forces and force ratio; sawing forces increase with material removal rate; in the high speed sawing, the effect of material removal rate on sawing forces is smaller than the one in the low speed.
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Xiang, Xin, Jian Yun Shen, Zhong Wei Hu, and Xi Peng Xu. "Study on Force Characteristics of Ultrasonic Vibration-Assisted Sawing Ceramics with Diamond Blade." Advanced Materials Research 1017 (September 2014): 120–25. http://dx.doi.org/10.4028/www.scientific.net/amr.1017.120.

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In the present research work, a new precision sawing technique is proposed, by which the ceramic workpiece is ultrasonically vibrated along the blade radial direction during the sawing operation using a diamond blade. In this study, experiments are conducted to study the sawing force characters of ultrasonic vibration-assisted sawing (UVAS) and conventional sawing (CS). The influences of the sawing parameters on the sawing force and force ratio are investigated. The results show that the sawing force in UVAS is smaller than those in CS. It was found that applying ultrasonic vibration to the sawing operation decreased the normal sawing force 18%-38% and tangential sawing force by 10%-25%. The force ratio in UVAS is lower than that in CS, which reveals that diamonds are easier to cut into the ceramic workpiece and the material machinability is improved.
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Zhang, Chenpu, Zhikui Dong, Yanheng Zhao, Ziliang Liu, Shang Wu, and Jiahao Yang. "Sawing Force Prediction Model and Experimental Study on Vibration-Assisted Diamond Wire Sawing." Micromachines 13, no. 11 (November 19, 2022): 2026. http://dx.doi.org/10.3390/mi13112026.

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Diamond wire sawing is the main machining technology for slicing various brittle materials, such as crystalline silicon, SiC, and NdFeB. Due to their high hardness and high brittleness, as well as the ease with which the surfaces of machined materials are damaged, it is difficult to further improve the sawing efficiency and the surface quality based on research conducted on the original machining method. In this paper, a vibration-assisted diamond wire sawing method is proposed. We analyzed the impact of load on the ingot, motion trajectory, and sawing depth of the abrasive particles, and a macroscopic sawing force prediction model for the vibration-assisted sawing method was established and verified via experiments. Based on the single-wire-sawing experiment and prediction model, the influences of the vibration parameters and sawing parameters on the sawing force were determined. The influences of vibration assistance on the surface quality, including the roughness profile, waviness profile, thickness profile, Ra, and Rz, were explored through single-wire-sawing experiments, and the influences of vibration assistance on the geometric parameters of slices, such as the total thickness variation (TTV) and warp, were explored through multi-wire-sawing experiments. It was found that vibration-assisted sawing can reduce sawing force and improve surface quality.
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Ge, Pei Qi, Wen Bo Bi, Meng Ran Ge, Yang Jiao, and Chang Hou Lu. "Simulation Research for the Effect of KDP Crystal Defect and Initial Internal Stress on Sawing Stress." Materials Science Forum 874 (October 2016): 9–14. http://dx.doi.org/10.4028/www.scientific.net/msf.874.9.

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KDP (KH2PO4) crystal is a kind of excellent nonlinear optical crystals, which has been widely used in nonlinear optical and Inertial Confinement Fusion (ICF) engineering. KDP crystal with the characteristics of low hardness, high brittleness, easy deliquescence and temperature-sensitive is easy to crack during the crystal growth, taken out from crystallizer, and the process of slicing. Stress concentration caused by the initial internal stress redistribution and the growth defect in KDP crystal is an important reason of KDP crystal cracking during sawing process. The numerical simulation model of the KDP crystal containing spherical cavity defect and sawing with fixed abrasive wire saw is established by finite element method in this paper. The effects of initial internal stress, spherical cavity defect on sawing stress are investigated. The maximum tensile stress near the defect during the sawing process is simulated and analyzed. The results show that sawing stress changes smoothly during sawing process, and the fixed abrasive wire saw slicing belongs to low stress cutting way. The sawing stress at sawing kerf is increased obviously. The crystal defect leads to local stress concentration during sawing process. The coupling effect of sawing stress with initial internal stress and the effect of stress concentration are enhanced when the sawing kerf approaches to the defect.
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Han, Q. L., Yuan Li, and Xi Peng Xu. "A Comparative Study of Stone Sawing with Thin and Normal Blades." Key Engineering Materials 329 (January 2007): 687–92. http://dx.doi.org/10.4028/www.scientific.net/kem.329.687.

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In this paper, an experimental study was conducted to compare the sawing of granite with thin and normal blades. The power drawn by the spindle and horizontal and vertical forces were measured. The width of sawing slot on the granite was examined after sawing. For both blades, power and forces increase with the depth of cut. The width of sawing slots for the thin blade was about 75% of the normal blade. The width of sawing slots for either thin or normal blade sawing became narrower in larger depth of cut.
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Huang, Guo Qin, and Xi Peng Xu. "Sawing Characteristics of a Diamond Circular Blade with Grits in Ordered Distribution." Solid State Phenomena 175 (June 2011): 161–65. http://dx.doi.org/10.4028/www.scientific.net/ssp.175.161.

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The sawing characteristics of a diamond circular blade with grits set in ordered distribution were investigated in comparison with a conventional blade on which grits are of random distribution. The two blades were tested under the same sawing conditions. Forces and power were monitored during sawing. The results indicate that the changing tendency of sawing forces and power versus sawing parameters are basically same for the two blades. However, the setting of grits in ordered distribution leads to lower sawing forces as well as force ratio, and can reduce nearly one third energy consumption.
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Chen, Chao Chang Arthur, and Pei Hsiun Chao. "Surface Texture Analysis of Fixed and Free Abrasive Machining of Silicon Substrates for Solar Cells." Advanced Materials Research 126-128 (August 2010): 177–80. http://dx.doi.org/10.4028/www.scientific.net/amr.126-128.177.

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Multi-wire sawing process has been widely used for wafer slicing of silicon substrates for solar cells. Usually there are two different kinds of wire saw in multi-wire sawing process including free abrasive wire sawing with SiC grits and fixed abrasive wire sawing with diamond wire. For free abrasive wire sawing process, the material removal mechanism can be considered as lapping and the fixed abrasive wire sawing can be considered as grinding. This paper is to investigate the characteristics of the surface texture of silicon substrate fabricated by these two wire sawing process. Experimental results have been observed by white light interferometry and SEM. Some different properties of both processes have compared been with variant characteristics including 2-D and 3-D surface roughness parameters. Results of this paper can be further used to evaluate the feasibility of wire sawing process of silicon substrates for solar cells.
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Zheng, Feng Biao, Mei Chen, Jian Yun Shen, Hua Guo, and Xi Peng Xu. "Study on Machining Characteristics of Sawing Al2O3 Ceramic with Diamond Cut-Off Wheel." Advanced Materials Research 497 (April 2012): 25–29. http://dx.doi.org/10.4028/www.scientific.net/amr.497.25.

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In the present study, sawing forces of Al2O3 ceramic and wear of metal-bonded diamond cut-off wheel were examined by counting the statistical data of diamond wear and analyzing the force signals under different sawing conditions. The experimental results demonstrated that normal grinding force reduced with the increasing of sawing speed, and rose with the increasing of workpiece feed rate and grinding depth. In all of the variables, sawing depth made the greatest effects on normal grinding froce. The percentage of whole crystal or pull-out crystal decreased and fractured crystal increased as the sawing depth increased or the sawing speed decreased. Among machining factors, sawing speed was the greatest effectors on the wear of diamond cut-off wheel.
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Möhringer, Stefan. "Innovative Lösungen zum Einschnitt von Starkholz | Innovative solutions for cutting large timber." Schweizerische Zeitschrift fur Forstwesen 157, no. 12 (December 1, 2006): 546–50. http://dx.doi.org/10.3188/szf.2006.0546.

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Modern sawing techniques focus mainly on small and medium diameter round wood due to the easier and higher-performing sawing ability. This evolution was mainly driven by chippercanter sawing technology, which allowed increasing sawing feed speeds. Nowadays, increasing competition between sawmills concerning the raw material turns the focus once again towards large diameter round wood. This contribution intends to give a survey of state-of-the-art sawing technologies, pointing out their specific advantages and inconveniences. In conclusion, the article shows that available sawing technologies can process large diameter round wood in a cost efficient way.
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Shen, Jianyun, Xu Zhu, Jianbin Chen, Ping Tao, and Xian Wu. "Investigation on the Edge Chipping in Ultrasonic Assisted Sawing of Monocrystalline Silicon." Micromachines 10, no. 9 (September 16, 2019): 616. http://dx.doi.org/10.3390/mi10090616.

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Monocrystalline silicon is an important semiconductor material and occupies a large part of the market demand. However, as a hard-brittle material, monocrystalline silicon is extremely prone to happen edge chipping during sawing processing. The edge chipping seriously affects the quality and performance of silicon wafers. In this paper, both conventional and ultrasonicassisted sawing tests were carried out on monocrystalline silicon to study the formation mechanism of edge chipping. The shape and size of edge chipping after sawing process were observed and measured. The experimental results demonstrated that different sawing processes present different material removal modes and edge quality. The mode of crack propagation was continuous cracks in conventional sawing process, while the expansion mode in ultrasonic assisted sawing was blasting microcracks. This results in the cutting force of ultrasonic assisted sawing becomes much smaller than that of conventional sawing process, which can reduce the size of edge chipping and improve the quality of machined surface.
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Dissertations / Theses on the topic "Sawing"

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Paul, Martin Andrew. "Arc sawing of nickel based superalloys." Thesis, University of Birmingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396243.

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Liljengren, Erik. "Adaptive sawing : - Yield of a concept in reality." Thesis, Linköping University, Linköping University, Wood Technology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-20899.

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Glue board is the base for much solid wood furniture produced by the IKEA-owned companySwedwood. Glue board is glued together from lamellas which can be produced in different waysbut in all cases is produced from boards coming from a saw-mill. In a saw-mill there aredifferent techniques for producing boards from logs. This thesis is about the Adaptive sawingconcept and its implementation at the Swedwood site in Kostomuksha. The idea with the conceptis to raise the output from the raw material, the yield. This is partly achieved by edging away islittle as possible from the boards in the saw-mill. The boards in the saw-mill are sawn in a waynot unlike through-sawing. When brought to the glue-board factory they are scanned in order tooptimise how to rip out as much lamellas as possible. The ripped lamellas are then cross-cut intodifferent sizes which later are glued to glue board. The objective of this thesis is to examine theyield from log to glue board for the log classes 135-148 mm and 110-120 mm, to try to improveit and to identify problem factors.In order to achieve that it was necessary to be sure of the volume figures at all stages. Theincoming volume was given by the scanner at the log sorting; effort was therefore put down tomake sure the figures could be trusted. For the smaller log class the logs were instead measuredby hand and the volume was calculated. The logs were then sawn in the saw-mill. This was donewith a low production speed and some problems were noted compared with when sawing with astandard technique. The absence of edging was the main reason for these problems. The saw-millline was deemed inappropriate for sawing the smallest log class but could handle the 135 -148mm class and the yield for that class was in line with what could be expected.In the lamella production line some minor problems were noted and the boards from the fourdifferent batches from the 135 – 148 mm log class got different yields mainly due to differencesin wood quality. The yield from log to glue board for these four batches varied from 17.6 % to21.5 % with an average at 19.3 %. The yield was lower than what was achieved for earlieradaptive sawing test batches on other places. Those tests were however done on other diameterclasses and with material that was slightly different than the one in Kostomuksha. Simulationswere done to check how much the yield could be raised if other lamella widths than just thestandard 46 mm lamella width was used. A raise to an average of 20.9 % could then be expectedwhen using the lamella widths 46, 55 and 60 mm.A similar simulation was done for the adaptive material that was produced from the 110 – 120mm log class. The total yield for that material rose from 19.4 % to 22.4 % when using morelamella widths. Lamellas from this material were tested as there was fear, that they would notmeet the standards for glue board production. This did however not prove to be the case. To usethe lamella production for producing such material is however not ideal, since a very smallvolume is produced.


Limfog är basen för de massivträmöbler som görs av IKEA:s helägda leverantör Swedwood.Limfog består av lameller som kan produceras på olika sätt. Oavsett produktionsteknik görs deav brädor som kommer från ett sågverk. På sågverket finns det också sågsätt för att såga utbrädor ur stockar. Det här examensarbetet behandlar konceptet adaptiv sågning och dessimplementering på Swedwoods anläggning i Kostomuksha. Den grundläggande idén medkonceptet är att höja utbytet på råvaran. Detta uppnås bland annat genom att så lite som möjligtkantas bort på brädorna i sågverket. Brädorna sågas upp med vad man kan kalla genomsågning.När brädorna sedan förts till limfogsfabriken scannas de så att så mycket som möjligt ska kunnafås ut av varje bräda i form av lameller. Lamellerna som sågats ut kapas sedan upp i olikastorleksklasser beroende på kvalitet. Dessa limmas sedan ihop till limfog. Syftet med det härexamensarbetet är att ta fram utbytet från stock till färdig limfog för stockklasserna 135 – 148mm och 110 – 120 mm. Dessutom ska problemfaktorer identifieras och utbytet om möjligt höjas.För att uppnå detta syfte var det nödvändigt att ha säkra siffror för alla inblandade volymer isamtliga skeden. Stockarnas volym gav av en mätram vid timmersorteringen. Mycket kraft lasdärför ner för att säkerställa att dessa siffror var trovärdiga. Stockarna i den mindrediameterklassen mättes istället för hand och volym beräknades utifrån mätningarna. Stockarnasågades sedan på sågverket. Produktionshastigheten under sågningarna var låg och en delproblem i jämförelse med när sågning sker på mer traditionellt vis kunde noteras. Avsaknaden avkantning var huvudorsaken till dessa problem. Sågverkslinan visade sig vara olämplig för attsåga den mindre stockklassen, men kunde hantera stockar med en diameter på 135 – 148 mm.Utbytet för dessa var i linje med vad som kunde förväntas.I lamellproduktionslinjen kunde en del smärre produktionsproblem noteras och brädorna från defyra olika omgångarna av 135 – 148 mm stockar fick olika utbyte mest beroende på skillnader iråvarukvalitet. Utbytet från stock till limfog varierade från 17,6 % till 21,5 % och låg i snitt på19,3 %. Detta utbyte var lägra än vad som uppnåtts för adaptiv sågning på andra platser vidtidigare tester. De testerna utfördes dock på andra diameterklasser och det är därför svårt att raktav jämföra siffrorna. Dessutom kan råvaran ha varit något annorlunda. För att se hur mycketutbytet kunde höjas om andra lamellbredder användes förutom bara 46 mm, gjordessimuleringar. Totalutbytet kunde då höjas till i snitt 20,9 % i fall lamellbredderna 46, 55 och 60mm användes.En likadan simulering gjordes på materialet som producerades från diameterklassen 110 – 120mm. Totalutbytet för denna klass steg från 19,4 % till 22,4 % när fler lamellbredder användes.Eftersom det fanns viss oro att lamellerna skulle hålla lägre kvalitet övervakades de ilimfogsproduktionen. Oron visade sig obefogad. Att producera lameller från den diameterklassenär dock inte idealt eftersom den producerade volymen blir så liten.

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Mohammadpanah, Ahmad. "Flutter instability speed of guided splined disks, with applications to sawing." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/52060.

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In this thesis the vibration characteristics of guided splined saws are studied, both analytically and experimentally. Significant insights into the complex dynamic behavior of guided splined saws are presented by analytical investigation of the dynamic behaviour of spinning splined disks and then by conducting idling and cutting experimental tests of guided splined saws. Cutting tests are conducted at different speeds, at critical, supercritical, and post flutter speeds of a guided splined saw. The cutting results are compared to determine the stable operation speeds for guided splined saws. For the analytical studies, the governing linear equations are derived for the transverse motion of a constant speed spinning splined disk. The disk is subjected to lateral constraints and loads. Rigid body translational and tilting degrees of freedom are included in the analysis of total motion of the spinning disk. Also considered in the analyses are applied conservative in-plane edge loads at the outer and inner boundaries. The numerical solution of these equations is used to investigate the effect of the loads and constraints on the natural frequencies, critical speeds, and stability of the spinning disk. The sensitivity of the eigenvalues of the splined spinning disk to the in-plane edge loads is analyzed by taking the derivative of the spinning disk’s eigenvalues with respect to the applied loads. This analysis contains an evaluation of the energy transfer from the applied loads to the disk vibrations and is used to examine the role of critical system components in the development of instability. Experimental results are presented that support the validity of the analysis. The experimental results indicate that flutter instability occurs at speeds when a backward travelling wave of a mode meets a reflected wave of a different mode. The maximum stable operating speed of the rotating splined disk is defined as the initiation of flutter. Flutter instability speeds of splined saws of various sizes were computed and verified experimentally. Then flutter speed charts of splined saws were developed which provides primary practical guide lines for sawmills to choose optimum blade diameter, eye size, blade thickness, and a stable rotation speed.
Applied Science, Faculty of
Mechanical Engineering, Department of
Graduate
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Woxblom, Lotta. "Warp of sawn timber of Norway spruce in relation to end-user requirements : quality, sawing pattern and economic aspects /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5860-9.pdf.

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Wright, D. N. "The development of a rock classification system for use with diamond tools." Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339562.

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Gehring, Junior Waldemar. "Desempenho do stellite como material de ferramenta no serramento da madeira /." Guaratinguetá : [s.n.], 2011. http://hdl.handle.net/11449/94387.

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Orientador: Marcos Tadeu Tibúrcio Gonçalves
Banca: Manoel Cleber de Sampaio Alves
Banca: Ivaldo de Domenico Valarelli
Resumo: O presente trabalho apresenta uma análise de parâmetros para a seleção de material de ferramenta de corte indicando o uso do Stellite como alternativa para obter melhor produtividade nas serrarias de desdobro de madeiras no Brasil. Para tanto, estudou-se as inter relações entre a propriedades físico químicas de espécies de madeira tropical e o processamento mecânico de desdobro das mesmas, além das origens do desgaste dos materiais empregados como ferramenta de corte. Foram realizados experimentos para determinar as características de densidade básica, teor de sílica e acidez de algumas espécies de madeira tropicais. As espécies estudadas foram: Angelim vermelho (Dinizia excelsa Ducke), Angelim pedra (Hymenolobium petraeum Ducke), Maçaranduba (Manilkara huberi (Ducke) Chevalier), Itaúba (Mezilourus lindaviana Schwacke & Mez), Mandioqueira lisa (Qualea albifloraWarm), Mandioqueira escamosa (Qualea paraensis Ducke) e Quaruba fissurada (Vochysia maxima Ducke). Para tais experimentos, as amostras foram colhidas e gerenciadas nas regras do manejo sustentável. Após a caracterização das espécies e análise do grau de abrasividade das mesmas, foi escolhida a espécie "Maçaanduba" para os testes de desempenho em processos de usinagem e, nas condições de corte e processamento utilizadas, relata-se de forma comparativa os apectos teóricos citados na revisão bibliográfica. Como resultado, pode-se comprovar que o material Stellite apresentou desempenho superior relativo ao desgaste e avarias, quando comparado com outros materiais como o metal duro, além de demonstrar um efetivo ganho de produtividade no serramento de toras de madeira de maçaranduba
Abstract: This study presents an analysis of selection parameters for cutting tool materials, indicating Stellite alloy as a substitute to improve sawmill productivity in Brazil. For that purpose, it was studied the interrelationship between the physical and chemical properties of tropical wood and the wood cutting mechanical process, as well as the origins of wear in cutting tool materials. Some tropical woods were tested for specific, gravity, silica content and acidity. The following species were studied: Angeli vermelho (Dinizia excelsa Ducke), Angelim pedra (Hymenobolobium petraeum Ducke), Maçaranduba (Manilkara huberi (Ducke) Chevalier), Itaúba (Mezilaurus lindaviana Schwacke & Mez), Mandioqueira lisa (Qualea albiflora Warm), Mandioqueira escamosa (Qualea paraensis Ducke) e Quaruba fissurada (Vochysia maxima Ducke). For those experiments, the samples were collected and processed following sustainable management practices. After characterization and analysis of abrasion degree of those species, the Manilkara huberi (Ducke) Chevalier was selcted for the machining process performance tests. Under the cutting and processing conditions established, the theoretical aspects cited in the references are comparatively reported. As a result, it was possible to demonstrate that the Stellite alloy displayed better wear and tear perfomance when compared with other materials sucha as hard beside demonstrating effective productivity gain when sawing Manilkara huberi (Maçaranduba) wood
Mestre
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Ashford, Sheridan. "Validation of a Redwood Sequoia Sempervirens (D. Don) Endl Butt Log Sawing Simulator." Thesis, University of Canterbury. School of Forestry, 2013. http://hdl.handle.net/10092/9904.

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Redwood (Sequoia sempervirens (D. Don) Endl.) has been identified as a species with considerable potential for plantation forestry in New Zealand. Investment decisions in high value alternate species must be based on accurate wood quality and value predictions. There is an opportunity to extend non-destructive evaluation tools available to redwood growers, and to present the outputs of the growth model by log products and sawn timber. A redwood pruned buttlog sawing simulator has been developed however the simulator had not been tested with real data. Twelve redwood trees from Mangatu estate were selected for a sawing study; these logs were reconstructed and run through the sawing simulator. Computerised log processing was used to produce simulated pruned log sawing outturn from the redwood Buttlog Sawing Simulator, and results were compared to real results from a sawing study. The objective of the study was therefore to determine how well the simulator matched volume and grade out-turn from twelve logs. This study found the many inconsistencies between simulated data and real data; particularly related to log size. While this study was unsuccessful in validation of the redwood sawing simulator, it provides initial insight into the simulators strengths and short comings.
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Lindner, Berndt Gerald. "Determining optimal primary sawing and ripping machine settings in the wood manufacturing chain." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86672.

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Thesis (MEng)--Stellenbosch University, 2014.
ENGLISH ABSTRACT: For wood manufacturers around the world, the single biggest cost factor is known to be its raw material. Thus maximum utilisation, specifically volume recovery of this raw material, is of key importance for the industry. The wood products industry consists of several interrelated manufacturing steps for converting trees into logs and logs into finished lumber. At most primary and secondary wood processors the different manufacturing steps are optimised in isolation or based on operator experience. This can lead to suboptimal decisions and a substantial waste of raw material. The objective of this study was to determine the optimal machine settings for two interrelated operations, namely the sawing and ripping operations which have traditionally been optimised individually. A model, having two decision variables, was developed which aims to satisfy market demand at a minimal cost. The first decision was how to saw the log supply into different thicknesses by choosing specific sawing patterns. The second was to decide on a rip saw’s settings, namely part priority values, which determines how the products from the primary sawing operation are ripped into products of a certain thickness and width. The techniques used to determine the machine settings included static simulation with the SIMSAW software to represent the sawing operation and mixed integer programming to model the ripping operation. A metaheuristic, namely the Population Based Incremental Learning algorithm, was the link between the two operations and determined the optimal settings for the combined process. The model’s objective function was formulated to minimise the cost of production. This cost included the raw material waste cost and the over or under production cost. The over production cost was estimated to include the stock keeping costs. The under production cost was estimated as the buy-in cost of purchasing the under supplied products from another wood supplier. The model performed well against current decision software available in South Africa, namely the Sawmill Production Planning System package, which combines simulation (SIMSAW) and mixed integer programming techniques to maximise profit. The model added further value in modelling and determining the ripping priority settings in addition to the primary sawing patterns.
AFRIKAANSE OPSOMMING: Die grootste enkele koste vir houtprodukvervaardigers wêreldwyd is dié van hulle roumateriaal. Die maksimale gebruik van rou materiaal, of volume herwinning, is dus van primêre belang vir hierdie industrie. Die vervaardigingsproses in die houtprodukte-industrie bestaan uit ‘n verskeidenheid interafhanklike stappe om bome na stompe te verwerk en stompe na eindprodukte. By meeste primêre -en sekondêre houtvervaardigers word die verskillende vervaardigingsstappe in isolasie ge-optimeer. Hierdie praktyk lei tot sub-optimale besluite en ‘n vermorsing van roumateriale. Die doelwit van hierdie studie was om die optimale masjienverstellings vir twee interafhanklike prosesse, die primêre -en kloofsaag prosesse, te bepaal. Tradisioneel word hierdie twee prosesse individueel optimeer. ‘n Model met twee besluitnemingsveranderlikes is ontwikkel wat poog om die markaanvraag te bevredig teen ‘n minimum koste. Die eerste besluit was watter saagpatroon gekies moet word om die stompe in die regte dikte produkte te saag. Die tweede besluit was wat die kloofsaagstellings, ook bekend as prioriteitswaardes, moet wees sodat die regte wydte produkte gesaag word. Die tegnieke wat gebruik is sluit statiese simulasie met SIMSAW sagteware in om die primêre saagproses te modelleer en gemengde heelgetalprogammering (“mixed integer programming”) om die kloofsaagproses te modelleer. ‘n Metaheuristiek genaamd die “Population Based Incremental Learning” algoritme,was die skakel tussen die twee operasies om die optimale masjienstellings vir die proses te bepaal. Die model se doelfunksie was geformuleer om die koste van produksie te minimeer. Hierdie koste sluit die roumateriaal afvalkoste en die kostes van oor -en onderproduksie in. Die oorproduksiekoste was ‘n skatting van die voorraadkostes. Die onderproduksiekoste was ‘n skatting van die koste om voorraad van ‘n ander verskaffer aan te koop. Die model het goed opgeweeg teen die beskikbare besluitnemingssagteware in Suid Afrika, die “Sawmill Production Planning System”, wat ‘n kombinasie van SIMSAW en ‘n gemengde heelgetalprogrammeringstegniek is. Die model het verder waarde toegevoeg deur die kloofsaag se prioriteitswaardes te modelleer saam met die primêre saagpatrone.
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Pogue, Vanessa Ann. "Measurement and analysis of wire sawing induced residual stress in photovoltaic silicon wafers." Thesis, Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/55071.

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The manufacturing process of a photovoltaic Si wafer comprises of first a high temperature heating process to produce a Si ingot from polycrystalline Silicon, which is then cut into bricks and subsequently sawn into wafers using a wire saw. These processes create residual stresses both from the thermal gradient induced by solidification and from either the rolling-indenting or scratching-indenting processes caused by the type of wire saw used. The objective of this research is to study silicon wafer residual stress as a result of the typical industry manufacturing processes and by doing so, better understand the mechanical properties that lead to increased fracture. This thesis aims to quantify the amount of residual stress generated by the solidification/thermal gradient produced during the casting of Si ingots separately from the residual stress generated by the wire sawing process. Samples from industry are used to compare the effects of the manufacturing processes on residual stress in multi-crystalline silicon (mc-Si) wafers including the effects of fixed abrasive diamond wire sawing (DWS) vs. loose abrasive (LAWS) slurry wire sawing used in the wafering process. Near-infrared birefringence polariscopy and polarized micro-Raman spectroscopy are used to study wafer residual stresses within grains and at grain boundaries in mc-Si as a function of etch-depth. While near-infrared birefringence polariscopy allows for the measurement of full-field maximum shear stress, micro-Raman spectroscopy provides decomposition of the stress tensor into both principal and shear in-plane stress components. Consequently, regions of high tensile stress, which are detrimental to the mechanical integrity of the wafer, can be easily identified. In addition to the mechanical characterization, the residual stress produced by the thermal gradient/solidification process for multi-crystalline Si wafers was also correlated to electrical performance of mc-Si wafers using photoluminescence.
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Tian, Jifang. "Self-excited vibrations of rotating discs and shafts with applications to sawing and milling." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0022/NQ34634.pdf.

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Books on the topic "Sawing"

1

Øvrum, Audun. Innleggingsnøyaktighet i sagmaskiner =: Feeding accuracy into sawing machines. Oslo: Norsk Treteknisk Institutt, 2001.

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Michael, Cea, ed. Portable Circular Sawing Machine Techniques. New York: Sterling Pub. Co., 1988.

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Hattori, Nobuaki. Sawing accuracy at Norwegian bandsaw mills =: Skurnøyaktighet ved norske båndsagbruk. [Blindern]: Norsk treteknisk institutt, 1985.

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Garland, John J. Increasing values through bucking practices: Manufacturing logs. Corvallis, Or: Extension Service, Oregon State University, 1985.

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Loehnertz, Stephen P. Sawing hardwoods in five tropical countries. Madison, Wisc: U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1994.

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Paul, Martin Andrew. Arc sawing of nickel based superalloys. Birmingham: University of Birmingham, 1999.

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Lewis, David W. Best Opening Face system for sweepy, eccentric logs: A user's guide. Madison, Wis: U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1986.

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Lewis, David W. Best Opening Face system for sweepy, eccentric logs: A user's guide. Madison, Wis: U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1986.

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Lewis, David W. Best Opening Face system for sweepy, eccentric logs: A user's guide. Madison, Wis: U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1986.

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Maeglin, Robert R. Evaluation of mixed hardwood studs manufactured by the Saw-Dry-Rip (SDR) process. [Madison, WI]: U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1985.

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Book chapters on the topic "Sawing"

1

Tschätsch, Heinz, and Anette Reichelt. "Sawing." In Applied Machining Technology, 147–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-01007-1_10.

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Paul, M. A., D. K. Aspinwall, C. F. Wong, D. J. Angell, and D. Mitchell. "Arc Sawing of Nickel Based Alloy." In Proceedings of the Thirty-Second International Matador Conference, 259–64. London: Macmillan Education UK, 1997. http://dx.doi.org/10.1007/978-1-349-14620-8_41.

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Thaler, Tilen, Primož Potočnik, and Edvard Govekar. "Experimental Characterization of Chatter in Band Sawing." In Lecture Notes in Mechanical Engineering, 701–9. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-39348-8_60.

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Brüggemann, Dominik, Jens Kneifel, and Stefan Bracke. "Fundamental Analysis of a Circular Metal Sawing Process." In Lecture Notes in Mechanical Engineering, 124–37. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-00805-4_11.

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Yu, Yi Qing, Y. F. Zhang, Yuan Li, and Xi Peng Xu. "Sawing of Granite with Side-Slotted Diamond Segments." In Advances in Machining & Manufacturing Technology VIII, 103–7. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-999-7.103.

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Huang, Hui, and Xi Peng Xu. "Study on the Wear of Diamond Beads in Wire Sawing." In Materials Science Forum, 436–39. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-421-9.436.

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Han, Q. L., Y. Li, and Xi Peng Xu. "A Comparative Study of Stone Sawing with Thin and Normal Blades." In Advances in Abrasive Technology IX, 687–92. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-416-2.687.

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Cheng, Chun-An, and Chin-Chung Wei. "Study of Sawing Performance of Band Saw Machine on Honeycomb Structure Material." In Lecture Notes in Mechanical Engineering, 308–20. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-9539-0_31.

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Thaler, Tilen, Primož Potočnik, Peter Mužič, Ivan Bric, Rudi Bric, and Edvard Govekar. "Chatter Recognition in Band Sawing Based on Feature Extraction and Discriminant Analysis." In Condition Monitoring of Machinery in Non-Stationary Operations, 607–15. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28768-8_63.

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Huang, Guo Qin, and Xi Peng Xu. "Analysis of the Breakage of Diamond Wire Saws in Sawing of Stone." In Advances in Grinding and Abrasive Technology XIII, 123–26. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-986-5.123.

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Conference papers on the topic "Sawing"

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Jujukin, Nikolai. "GEOMETRY OF KERF WHEN CURVE SAWING WITH A CIRCULAR RIP-SAW." In Modern machines, equipment and IT solutions for industrial complex: theory and practice. FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov, 2021. http://dx.doi.org/10.34220/mmeitsic2021_224-227.

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Rip-sawing following the curvature of a crooked log means advantages for yield. However, the possibility to saw in a narrow curve with a circular saw blade is limited because of the inherently flat geometry of circular saw blades. For a double arbour circular saw the situation is even more problematic because the two blades have a certain overlap and thus, the two arbours are not positioned in the same horizontal position. In this study, a theoretical geometrical study of the creation of a kerf with a single circular saw blade and with a double arbour circular saw with two saw blades was examined. Results for stiff saw blades show that the kerfs become in general curved and inclined (tilted) in the vertical direction and also that the width of the kerfs for double arbour saws becomes wider at the top and bottom of the cant than in the middle. Additionally, the sawn boards obtain varying thickness along their width because of the varying kerf width. A comparison with experimental thickness data from four test sawings at a sawmill indicates that the theoretical results are valid and that curve sawn boards become thinner than straight sawn boards.
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Zhang, Shao-Yong, Zhi-Gang Liu, Cheng-Hui Pei, Zhong-Xiang Ma, Zhen Ji, Peng-Fei Liu, and Ming-Ze Duan. "Reliability Influencing Factors Analysis of Sawing Spindle on Sawing Platform." In 2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE). IEEE, 2019. http://dx.doi.org/10.1109/qr2mse46217.2019.9021226.

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Maksimenkov, Alexey, Aleksandr Miltsin, A. Starodubov, and O. Bagno. "ABOUT THE PREPARATION FOR THE WORK OF BAND AND FRAME SAWS." In Ecological and resource-saving technologies in science and technology. FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov, 2022. http://dx.doi.org/10.34220/erstst2021_145-149.

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Sawing wood with band and frame saws is considered as a technological system at the level of a technological operation. Such a system is a set of functionally interconnected, interdependent and conditionally indivisible elements: a sawn workpiece, a band saw, a frame saw, a machine tool, a sawing mode, the environment and the operator. Changing any element of this system inevitably leads to a change in the technological system, to a change in the quality of its functioning. That is why the operation of band saws and sawmills at different enterprises occurs in different ways. Increasing the efficiency of sawing involves reducing the probability of failures associated with a decrease in the quality of sawn surfaces, premature blunting of the cutting edges of the teeth and a burst of tapes, reduced productivity and increased energy consumption and noise levels, etc.
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Yun, Zhifeng, Sun Joseph Chang, Zhou Lei, Gabrielle Allen, and Ashwin Bommathanahalli. "Grid-enabled sawing optimization." In the 15th ACM Mardi Gras conference. New York, New York, USA: ACM Press, 2008. http://dx.doi.org/10.1145/1341811.1341829.

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Pearlman, John J., Anil Saigal, and Thomas P. James. "Linear Sawing Apparatus and its Evaluation for Research Into High Speed Bone Sawing." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-65148.

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Previous research into the cutting mechanics of bone sawing has been primarily approached from the perspective of orthogonal metal machining with a single edge cutting tool. This was a natural progression from the larger body of knowledge on the mechanics of metal cutting. However, there are significant differences between typical orthogonal metal cutting parameters and those encountered in bone sawing, such as anisotropic material behavior, depth of cut on the order of cutting edge radius, chip formation mechanism in the context of a saw blade kerf, non-orthogonal considerations of set saw blade teeth, and cutting speed to name a few. In the present study, an attempt is made to overcome these shortcomings by employing a unique sawing fixture, developed to establish cutting speeds equivalent to those of typical sagittal saws used in orthopaedic procedures. The apparatus was developed for research into bone sawing mechanics and is not intended to be a commercial sawing machine. The sawing fixture incorporates the cutting speed possible with lathe operations, as well as the linear cutting capabilities of a milling machine. Depths of cut are on the same order of magnitude as the cutting edge radius typical to saw blade teeth. Initial measurements of cutting and thrust force, obtained with this new experimental equipment, are compared to previous work.
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Lottspeich, Lydia, Petra Müller, and Thomas Kaden. "Metal contamination of silicon wafers in diamond wire sawing processes depending on the sawing parameters." In SILICONPV 2018, THE 8TH INTERNATIONAL CONFERENCE ON CRYSTALLINE SILICON PHOTOVOLTAICS. Author(s), 2018. http://dx.doi.org/10.1063/1.5049342.

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Hu, Shanshan, Fan Yang, Zili Yang, Feixiang Xiong, Weiwei Shi, and Hongqun Tang. "Sawing Status Prediction of Diamond Sawblade Sawing Concrete Based on the Characteristics of Material Composition." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86340.

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Diamond sawblade is an efficient tool to building renovation or demolition. Concrete used in construction is a typical composite material with random distribution, which is difficult to accurately identify and predict even under the same processing conditions, and tool life of diamond sawblade is difficult to control. In this paper, by cutting out single component of the hard and soft aggregate separately from concrete, the single component and concrete experiments were carried out to understand the sawing characteristics of different components. The wavelet decomposition was used to analyze the characteristic of each frequency band of the different components sawing force and vibration signals, and the sensitive frequency bands after correlation coefficient and energy ratio variation of each wavelet layer were extracted to judge the bluntness status of sawblade. By taking the Root-Mean-Square (RMS) value, the energy ratio of d2 and d5 wavelet layers and the standard deviation of sawing force and vibration signal as the characteristic values of the sawblade, a neural network optimized by bat algorithm was established to analyze the concrete processing signals and predict the working state of the sawblade. Evidence theory was adopted to combine the prediction results of sawing force and vibration samples to increase the overall prediction accuracy and reliability. The test sample showed that this method can correct inconsistent individual sensor predictions while being as close to the actual status value as possible. It provides an effective tool life prediction way of the diamond sawblade and a theoretical method for the monitoring of non-metallic materials with inhomogeneous components.
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Batrakhanov, Daniel, Fedor Zolotarev, Tuomas Eerola, Lasse Lensu, and Heikki Kalviainen. "Virtual sawing using generative adversarial networks." In 2021 36th International Conference on Image and Vision Computing New Zealand (IVCNZ). IEEE, 2021. http://dx.doi.org/10.1109/ivcnz54163.2021.9653436.

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Hua, Y. N., E. C. Low, L. H. An, and Shailesh Redkar. "Failure Analysis and Elimination of Galvanic Corrosion on Bondpads During Wafer Sawing." In ISTFA 2000. ASM International, 2000. http://dx.doi.org/10.31399/asm.cp.istfa2000p0369.

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Abstract In our previous paper [1], discolored bondpads due to galvanic corrosion were studied. The results showed that the galvanic corrosion occurred in 0.8 ìm wafer fabrication (fab) process with cold Al alloy (Al-Si, 0.8 wt%-Cu, 0.5 wt%) metallization. Galvanic corrosion is also known as a two-metal corrosion and it could be due to either wafer fab process or assembly process. Our initial suspicion was that it was due to a DI water problem during wafer sawing at assembly process. After that, we did further failure analysis and investigation work on galvanic corrosion of bondpads and further found that galvanic corrosion might be due to longer rinsing time of DI water during wafer sawing. The rinsing time of DI water is related to the cutting time of wafer sawing. Therefore, some experiments of wafer sawing process were done by using different sizes of wafer (1/8 of wafer, a quadrant of wafer and whole of wafer) and different sawing speed (feed-rate). The results showed that if the cutting time was longer than 25 minutes, galvanic corrosion occurred on bondpads. However, if the cutting time was shorter than 25 minutes, galvanic corrosion was eliminated. Based on the experimental results, it is concluded that in order to prevent galvanic corrosion of bondpads, it is necessary to select higher feed-rate during wafer sawing process at assembly houses. In this paper, we will report the details of failure analysis and simulation experimental results, including the solution to eliminate galvanic corrosion of bondpads during wafer sawing at assembly houses.
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Rakurty, C. S., and Nithin Rangasamy. "An Experimental Study on Sustainable Bandsawing Solutions for Structural Applications." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-73133.

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Abstract In this study, a fundamental investigation on the effect of cutting fluid application and type of fluid on sawing I-beams was carried out. This research hypothesizes that the minimum quantity fluid system with the right coolant/lubricant can be an effective and a sustainable sawing solution for structural applications by reducing cutting forces and surface roughness. A 41 mm bimetal band saw blade with 4/6 TPI (variable tooth per inch) was used on an Amada horizontal scissor saw at a constant feed and speed to saw I-beams. The Saw Blade Lube System™ by UNIST was the minimum quantity fluid system used in this study, and the system was used as recommended by the manufacturers. Four different cutting fluid applications and coolant combinations, namely, dry, flood application using synthetic oil + water, minimum quantity application using biodegradable vegetable oil + compressed air (recommended by the manufacturer), and minimum quantity application using the synthetic oil + water, are studied. Surface roughness, micro-hardness, and sawing forces were recorded/measured and analyzed for all four cutting fluid conditions. Chip welding/built-up edge formation and flank wear were studied to understand the interactional effects of the cutting fluid applications. Based on the results, it is evident that lubrication is more important than cooling in sawing I-beam due to the interrupted nature of sawing. This study lays a road map for optimizing the cutting fluid application for band sawing.
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Reports on the topic "Sawing"

1

Winn, Robert. Redrawing a Remote Sawing Assembly. Office of Scientific and Technical Information (OSTI), July 2021. http://dx.doi.org/10.2172/1813450.

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Bennett, Neal. Sawing methods for improving lumber yield recovery of out-of-shape hardwood saw logs. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station, 2014. http://dx.doi.org/10.2737/nrs-gtr-130.

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Sachs, Emanuel, and Tonio Buonassisi. Thin, High Lifetime Silicon Wafers with No Sawing; Re-crystallization in a Thin Film Capsule. Office of Scientific and Technical Information (OSTI), January 2013. http://dx.doi.org/10.2172/1060193.

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Yaussy, Daniel A., Martin E. Dale, and Martin E. Dale. Merchantable sawlog and bole-length equations for the Northeastern United States. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station, 1991. http://dx.doi.org/10.2737/ne-rp-650.

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Lamson, Neil I., H. Clay Smith, and H. Clay Smith. Effect of logging wounds on diameter growth of sawlog-size Appalachian hardwood crop trees. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experimental Station, 1988. http://dx.doi.org/10.2737/ne-rp-616.

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Lamson, Neil I., H. Clay Smith, and H. Clay Smith. Effect of logging wounds on diameter growth of sawlog-size Appalachian hardwood crop trees. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experimental Station, 1988. http://dx.doi.org/10.2737/ne-rp-616.

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Shrestha, M., and R. Shilpakar. Water Quality in South Asia: Issues and Status: SAWAN Workshop Proceedings. Kathmandu, Nepal: International Centre for Integrated Mountain Development (ICIMOD), 2005. http://dx.doi.org/10.53055/icimod.438.

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Shrestha, M., and R. Shilpakar. Water Quality in South Asia: Issues and Status: SAWAN Workshop Proceedings. Kathmandu, Nepal: International Centre for Integrated Mountain Development (ICIMOD), 2005. http://dx.doi.org/10.53055/icimod.438.

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Dwinell, L. David. Incidence of the pine wood nematode in green coniferous sawn wood in Oregon and California. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station, 1993. http://dx.doi.org/10.2737/se-rn-367.

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Barge loading facilities in conjunction with wood chipping and sawlog mill, Tennessee River Mile 145. 9R: Environmental assessment. Office of Scientific and Technical Information (OSTI), August 1990. http://dx.doi.org/10.2172/6304723.

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