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Relevant bibliographies by topics / Sheep shearing

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Academic literature on the topic 'Sheep shearing'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 July 2024

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Journal articles on the topic "Sheep shearing"

1

KHUDAIBERDYEV, N. R., and V. A. NASIBYANTS. "ANALYSIS OF THE MOBILE SHEARING STATIONS’ DESIGNS." Техника и технологии в животноводстве 14, no. 2 (2024): 61–66. http://dx.doi.org/10.22314/27132064-2024-2-61.

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Sheep farming is the main livestock industry in many countries. Further sheep farming growth in order to the population with cheap food products fully satisfying on the industry processes comprehensive mechanization basis, taking into account the sheep and pastures’ specific conditions should be carried out. There in sheep keeping technology, the most responsible and time consuming process is sheep shearing. The sheep shearing machine development’s history was mainly along the shearing machine design improving. However, even a completely perfect shearing machine is not able the labor productivity increase overall problem solving. Sheep shearing machine use by shearers’ working is greatly facilitated. Stationary and mobile shearing stations to carry out sheep mechanized shearing are used. A specific analysis of these points, as well as comments on each of them is given. Due to the sheep farms reorganization there in many parts of the country, this industry’s economic analysis suggests that there need sheep mass shearing at mobile shearing stations organizing. This is especially desirable for desert pastures’ conditions, as sheep throughout the year here are kept. A brief analysis of four mobile shearing stations (units) sets’ designs developed in Turkmenistan and Russia makes it possible to note that all of them with the necessary equipment for shearing sheep at the highest level are equipped. All shearing stations in production conditions had been tested and for production are recommended. For further research in this area, it is necessary mobile shearing stations (several copies) producing in order to them improving and in sheep breeding in various zones applying.

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2

Hatcher, S., K. D. Atkins, and K. J. Thornberry. "Strategic use of sheep coats can improve your economic return." Australian Journal of Experimental Agriculture 48, no. 7 (2008): 762. http://dx.doi.org/10.1071/ea08036.

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Merino wethers from a mixed bloodline flock in western New South Wales were coated for varying periods of time after shearing between August 1999 and August 2000. The coated and a similar number of uncoated control wethers from each of nine bloodlines (three fine and six superfine) were grazed together as part of a larger mob. Dyebands were placed in the fleeces of each wether before fitting of the coats and were removed before shearing when a midside sample was taken and several subjective assessments and objective measurements were made of each fleece. It was concluded that coating sheep for 6 months after shearing is as effective in improving the quality of the Merino fleece as coating for the entire 12 month period between annual shearings. Strategic coating of sheep after shearing is a viable option for wool producers to both reduce some of the management implications of coating and extend the useful life of sheep coats. Importantly, the magnitude of the net financial gain will vary according to the prevailing micron premium and premiums and discounts applied to style and vegetable matter. A software tool is described that allows producers to identify the potential financial gain in any market scenario.

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3

Hudson, P. R. W. "High Technology Options for Sheep Shearing: Improved Shearing Devices." Outlook on Agriculture 15, no. 4 (December 1986): 218–24. http://dx.doi.org/10.1177/003072708601500408.

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Wool production is a very important factor in the Australian economy, representing $3 billion in exports. Nevertheless, rising production costs and growing competition from manmade fibres necessitate increased attention to all aspects of productivity if the industry worldwide is to remain viable. As some 80 per cent of labour content is involved in harvesting wool, improvements in the shearing process potentially offer particular opportunities for economies. This article reviews the results of a widely based Australian research programme which has investigated the fundamental physics of wool severance, especially in terms of energy requirement, leading to improved design of shearing devices incorporating more efficient motors and novel cutter materials. Subsequent articles will review the process of automated mechanical shearing and chemical and biological defleecing.

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4

Aleksiev, Y. "Effects of time of shearing on growth rate and some physiological responses in fine wool of two tooth sheep." Biotehnologija u stocarstvu 23, no. 5-6-2 (2007): 179–89. http://dx.doi.org/10.2298/bah0702179a.

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Rectal temperature, pulse and respiratory rate dynamics and body weight changes were studied in two tooth fine wool sheep kept in barn and shorn at different time of the year. The sheep from the experimental group were shorn in February and the control ones - in May. A considerable decrease (P<0,01) in the daily gain was observed during the first weeks after winter shearing compared to pre shearing period and to unshorn controls but later on the growth rate was higher in the shorn sheep. The remarkable fall (P<0,01) in rectal temperature following the winter shearing persisted for two more months and recovered to pre shearing level in May. Similar decrease in rectal temperature after fleece removal was found in sheep shorn in May. Pulse rate increased after winter shearing (P<0,001) and recovered to pre shearing level by the third month after shearing. Shearing was found to reduce respiratory rate (P<0,01) in winter and spring shorn sheep but a significant increase (P<0,01) was registered in both group in May. The results suggest that energy expenditure shortly after shearing predominated over the energy intake independently of the level of feed intake, which resulted in reduced growth rate and activation of the compensatory mechanisms for saving the body heat.

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5

Tracy, Robert. "Sheep-Shearing at Vanity Fair." Notes and Queries 63, no. 2 (April 4, 2016): 252–54. http://dx.doi.org/10.1093/notesj/gjw018.

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6

Irandoust, Shabnum, Karen Heath, and Roger W. Byard. "Sheep shearing and sudden death." Journal of Forensic and Legal Medicine 20, no. 8 (November 2013): 944–46. http://dx.doi.org/10.1016/j.jflm.2013.06.015.

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7

Hernawan, Hudiana. "Sheep Shearing Impact on Garutian Sheep Physiological Responses." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 67, no. 6 (2019): 1441–45. http://dx.doi.org/10.11118/actaun201967061441.

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This study aims to determine the sheep’ physiological response as a result of shearing by evaluating heat tolerance coefficient. The observed measurements of heat tolerance coefficient were rectal temperature and respiratory rate. The results of this experimental method showed that the average rectal temperature of all Garut sheep groups ranged from 38.6 ℃–39.0 ℃, while the average respiratory rate of both sheep groups was 35.1 breaths per minute to 45.1 breaths per minute. Most of the Garut sheep groups during the study have 2.5 to 3.0 heat tolerance coefficient in which the recommended normal animal heat tolerance coefficient is 2. To sum up, the observed heat tolerance of the Garut sheep in both treatments is above the recommended value. Furthermore, there was a significantly lower difference in heat tolerance coefficient in shear-shaved sheep (2.5) compared to the unshaven ones (3).

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Ostapchuk, P. S., V. S. Pashtetsky, E. N. Usmanova, T. A. Kuevda, E. Yu Zyablitskaya, T. P. Makalish, and J. S. Saenko. "Environment and sheep wool quality indicators." IOP Conference Series: Earth and Environmental Science 965, no. 1 (January 1, 2022): 012028. http://dx.doi.org/10.1088/1755-1315/965/1/012028.

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Abstract The features of the skin histology and the determination of the quality indicators of wool of young female Tsigai breed sheep are presented in the article. A positive correlation was found between the fineness of the wool and the live weight (p ≤ 0.05); between the shearing of natural wool and the fineness of the wool (p ≤ 0.05); between the shearing of natural wool and the live weight (p ≤ 0.05); between the washed wool and the fineness of the wool (p ≤ 0.05) and the shearing of natural wool (p ≤ 0.05). There is no reliable relationship between the fineness and the percentage of the washed wool shearing. However, the percentage of the shearing of washed wool is negatively related to the live weight (p ≤ 0.05), the shearing of natural wool. The greatest thickness of the skin was on the back and leg are 968.07 and 968.24 microns respectively. It is assumed that the skin regeneration occurs due to the cells of the basal layer. This is due to the fact that the thickness of the basal layer decreases in the following order: side-back-leg-neck, which correlates with the degree of exposure to damaging factors on these areas.

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9

Hudson, P. R. W. "High Technology Options for Sheep Shearing: II – Automated Mechanical Shearing." Outlook on Agriculture 16, no. 1 (March 1987): 14–20. http://dx.doi.org/10.1177/003072708701600103.

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In the first article of this trilogy [1], the cost-price squeeze facing the Australian woolgrower was advanced as the motivation for spending more than $3 million p.a. on the Australian Wool Harvesting Programme. The first article summarized the use of technology to improve wool severing devices. This article addresses the progress of a novel technology – the use of robots to shear sheep.

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10

Taofik, A., S. Bandiati, A. M. Maskoen, and M. Yusuf. "The effects of shearing and ascorbyl palmitate administration on physiological and blood metabolite profile of Padjadjaran sheep under heat exposure treatment." Journal of the Indonesian Tropical Animal Agriculture 46, no. 1 (January 18, 2021): 12–19. http://dx.doi.org/10.14710/jitaa.46.1.12-19.

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Ascorbyl-6-palmitate (AP) was a lipid-soluble synthetic ester of ascorbic acid that has been used as a preservation agent for foods and as an antioxidant in cosmetics and related products. This study aims to investigate the effect of shearing management and ascorbyl palmitate administration on physiological and hematological profiles in under heat load Padjadjaran sheep. The physiological profile involves respiration rate (RR), Pulse rate (PR), and rectal temperature (RT). Twenty rams Padjadjaran 1 – 1,5 year-old, weighing between 25 to 47.5 kg used from sheep breeding station Purwakarta, West Java - Indonesia. There are two treatments level in this research, (1). Shearing divide into two groups, unshearing (c0) and shearing (c1); (2). AP administration also divides two groups, not given (a0) and given 400 mg each head daily (a1). The whole treatments were a0c0, a0c1, a1c0 and a1c1. Heat exposure application was exposed to sunlight when the sheep exposed, the animal tethered by rope at the neck region. The sheep exposed to the sun when the ambient temperature at least 34oC, 180 minutes each day, three days a week. The result showed that AP administration and shearing have interaction effects on RR, PR and RT. The level of glucose and total protein is affected by interaction effect of AP administration and shearing, while cholesterol affected to shearing. The conclusion, supplementing AP and shearing application could reduce the negative impact of heat stress on physiological and blood metabolite profiles of Padjadjaran sheep. Although the wool of local breed has not economic value, the shearing is regularly needed.

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Dissertations / Theses on the topic "Sheep shearing"

1

Campbell, Angus John Dugald. "The effect of time of shearing on wool production and management of a spring-lambing merino flock /." Connect to thesis, 2006. http://eprints.unimelb.edu.au/archive/00003254.

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2

Watkins, John H. "The application of plasma immersion ion implantation to sheep shearing combs /." Title page, contents and abstract only, 1995. http://web4.library.adelaide.edu.au/theses/09PH/09phw335.pdf.

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3

Aguilar, Lourdes-Angelica. "The effect of shearing sheep on feeding and behaviour in the pre-embarkation feedlot." Thesis, Aguilar, Lourdes-Angelica (2016) The effect of shearing sheep on feeding and behaviour in the pre-embarkation feedlot. Honours thesis, Murdoch University, 2016. https://researchrepository.murdoch.edu.au/id/eprint/34991/.

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Sheep entering the live export chain will experience increased handling, novel forms of feed, and novel environments before the journey on the export ship itself; all occurring over a period of around one month (Norris et al., 1989a). These factors can also cause stress (Kilgour & DeLangen, 1970; Hargreaves & Hutson, 1990a, 1990b; Doyle et al., 2010; Sanger et al., 2011), which could lead to a high incidence of inappetance and mortality (Norris & Richards, 1989b; Higgs et al., 1993). This study was conducted to determine whether the day of shearing could affect feeding and behaviour of sheep in the pre-embarkation period. Sheep were fitted with Radio Frequency Identification (RFID) tags that could be picked up by tracking antennae at all water and feed troughs in the pens when the sheep’s head was in such a position that the sheep was likely to be eating or drinking. The system then would record the total amount of time the sheep spent at the troughs per day. The sheep were shorn on either day 1, 2, 3, 4 or 5 and an ethogram was generated through analysis of 60-second video clips from footage of the sheep filmed one hour after shearing. There was no difference in time spent at feed troughs between any treatment groups on any day. There was a treatment effect, with the control (unshorn) group spending more time at the water trough; however, there were no difference between the other groups in time spent at water troughs or any behavioural states or events. The results suggest that shearing may occur on any day during the pre-embarkation feedlot period, and that current management practices do not disrupt time spent at the feed trough.

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Bryant, Roderick C. "Optimal systems for echo-location /." Title page, abstract and table of contents only, 1985. http://web4.library.adelaide.edu.au/theses/09PH/09phb915.pdf.

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5

Creelman, Glenn. "Investigation of the wear resistance and durability of high speed steel for use in sheep shearing comb construction." Thesis, University of Ballarat, 2001. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/63639.

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"The goal of this thesis was to evaluate high speed steel for use in the construction of sheep shearing combs, to determine if its use can be justified on a performance basis."
Master of Applied Science

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6

Creelman, Glenn. "Investigation of the wear resistance and durability of high speed steel for use in sheep shearing comb construction." University of Ballarat, 2001. http://archimedes.ballarat.edu.au:8080/vital/access/HandleResolver/1959.17/14611.

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"The goal of this thesis was to evaluate high speed steel for use in the construction of sheep shearing combs, to determine if its use can be justified on a performance basis."
Master of Applied Science

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7

Dreyer, Cristina Terres. "O monitoramento nutricional da ovelha, no período de um ano e o efeito da esquila no meio da gestação no peso ao nascer e perfil hematológico do cordeiro recém-nascido." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/55970.

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No Brasil, a produção de ovinos é um fator de grande importância econômico-social, principalmente no estado do Rio Grande do Sul (RS). Um dos principais problemas enfrentados neste mercado são as perdas reprodutivas, representadas por baixa taxa de prenhes, baixa prolificidade e alta mortalidade perinatal de cordeiros. A deficiência de informações sobre as causas dessas perdas motivaram a realização dos experimentos aqui apresentados. No primeiro artigo dados sobre o peso (kg), condição corporal (CC) e nível sérico de beta-hidoxibutirato (BHB) foram estimados em um grupo (n=16) de ovelhas Corriedale prenhes, mantidas a campo no RS, pelo período de um ano. O grupo experimental foi tomado aleatoriamente de um rebanho de 60 ovelhas encarneiradas por monta natural no outono. Das 60 ovelhas do rebanho expostas a carneiros 53 (88,3%) foram detectadas prenhes ao exame de ultrassonografia e somente oito com partos gemelares (13,3%). O peso médio não mostrou variação estatística significativa durante o período de observação. O peso no pré-encarneiramento de 51,04kg (±1,2) mostrou um pequeno aumento até o início do encarneiramento. Esse peso sofreu um pequeno declínio entre o início e o meio da gestação. Entre o meio e o final da gestação houve um pequeno aumento de peso experimentando a partir dai um declínio, chegando ao seu menor valor de 47,93kg (±0,31), no início da lactação. A CC média das ovelhas aumentou entre o pré-encarneiramento e a início da gestação (p<0,05), sendo que a CC média de 2,9, observada no início da gestação foi a mais elevada durante o período de observação. Observou-se, por outro lado, um declínio no valor médio da CC do rebanho no meio, final da gestação e início da lactação, observando-se o valor mais baixo da CC, 2,03 (±0,11) (p<0,05), no início da lactação. Os valores séricos médios de BHB mantiveram-se estáveis durante o pré-encarneiramento e o início da gestação. A partir do meio da gestação observou-se um aumento no valor médio desse metabólito, tendo sido observado diferença significativa (p<0,05) entre o meio e o final da gestação. O valor mais elevado de 0,595 mmol/L (±0,10) foi detectado no início da lactação, sendo esse valor significativamente diferente (p<0,05) do observado no final da gestação, sugerindo um desbalanço energético. Conclui-se que o ganho de peso ou CC, observada no pré-encarneiramento foram aparentemente insuficientes para elevar a taxa de prenhez e a prolificidade do rebanho. No segundo artigo foi observado o efeito da esquila, no meio da gestação, sobre o peso ao nascer e perfil hematológico de cordeiro, peso da placenta, condição corporal das ovelhas no momento do parto, por dois anos reprodutivos consecutivos. O grupo experimental foi constituído de 41 ovelhas no primeiro ano (2010) e de 51 ovelhas no segundo ano (2011). As ovelhas, da raça Corriedale, foram mantidas em pastagem natural e cultivada durante a gestação. O encarneiramento (45 dias) foi feito por monta natura com 6-7% de carneiros reprodutivamente aptos, no outono (março/abril). Aos 50 dias da retirada dos carneiros foi realizado diagnóstico ultrassonográfico de gestação. A metade da cada grupo de ovelhas gestando, em cada ano, foi então submetida a esquila completa (grupo E). As ovelhas restantes forma mantidas com lã, constituindo o grupo NE. No ano de 2010, a esquila foi realizada aos 72 dias e em 2011 aos 74 dias de gestação, em média. Cada ovelha teve o parto acompanhado desde os primeiros sinais do trabalho até a expulsão completa do feto. Em 2010 realizou apenas a pesagem dos cordeiros, já em 2011 além da pesagem do cordeiro foi realizada a pesagem da placenta e coleta sanguínea do cordeiro recém-nascido para análise bioquímica e hematológica. O peso ao nascer dos cordeiros do grupo de ovelhas E e NE foram de 5,56kg (±1,2) e 4,84kg (±0,9) no ano de 2010 e de 5,57kg (±1,07) e 4,32kg (±1,1) para o ano de 2011 (p<0,05), nos dois anos. O peso médio da placenta do grupo de ovelhas E e NE foi de 497,5g (±98,2) e 380g (±133,5), respectivamente (p<0,05). Foi também observado, que o valor médio do hematócrito do grupo de cordeiros provenientes de ovelhas do grupo E foi menor (43%) que o valor médio dos cordeiros nascidos de ovelhas do grupo NE (46%) (p<0,05). Não foram observadas diferenças entre os níveis médios de lactado de cordeiros nascidos dois grupos. Finalmente, os dados aqui obtidos mostraram não haver diferença (p>0,05) entre o escore de CC das ovelhas, no momento do parto, com o peso ao nascer dos cordeiros nos dois grupos, durante os dois anos de experimento.
In Brazil, the sheep industry is an important social and economic sector; mainly in the state of Rio Grande do Sul (RS). One of the most pressing problem faced by the industry are the reproductive losses, caused by a low pregnancy rate, low prolificity and high perinatal mortality. The lack of information about the causes of these reproductive waists led to the conduction of two experiments here presented. In the first paper, data on body live weight (kg) (BLW), body condition score (BC) and serum level of beta-hydroxybutirate (BHB) were estimated in a group (n=16) of pregnant Corriedale ewes, grazed on natural pasture of Rio Grande do Sul (RS) state, during one year observation period. The experimental group was taking randomly from a flock of 60 ewes exposed to rams during the autumn. Of the 60 original flock ewes only 53 (88,3%) were detected pregnant at scanning and only 13% show multiple pregnancy. The BLW did not show statistics difference during the observation periods. However the BLW of 51,04kg (±1,2) showed a little increase on the pre-tupping time period. Then a small lost of BLW was observed between the beginning and middle of gestation period. From then to the final of gestation period a small increase of BLW was detected. The minor BLW of 47,93kg (±0,31) was detected at the beginning of the lactation period. The BC mean increased during the pre-tupping time and beginning of pregnancy (p<0,05), being the BC of 2.9, observed on the beginning of gestation period, the most elevated value detected. On the other hand, a decrease of the BC mean was observed starting on the middle of gestation until the beginning of lactation periods, when the lower value (2.03 ±0,11) (p<0,05) was detected. The serum values of BHB were stable on the pre-tupping and beginning of gestation periods. An increase statistically significant (p<0,05) of the metabolic was then detected between the middle and final of gestation periods. The highest value observed of 0,595 mmol/L (±0,10mmol/L) occurred at the beginning of lactation (p<0,05) when compared with the final of gestation suggesting an energetic disbalance. Finally, the information obtained in this paper suggested that the gain in BLW and BC observed in the pre-tupping time period was not enough to increase the pregnancy and prolificacy rates of the flock. In the second paper, the medium gestation shearing effect on the birth weight and haematocrit value of lambs, placental weight and body score condition (SC) of ewes at parturition, during two reproductive years was observed. The experimental group was constituted of 41 ewes on the first year (2010) and 51 ewes on the second year (2011) . The Corriedale ewes were grazed on natural and cultivated pasture during the gestation period. The ewes were exposed (45days) to 6-7% fertile rams in the autumn (March and April). The scanning was performed in all ewes fifty days after the ram’s removal. Each year one half of the pregnant ewes were sheared (S group) and the remain left unsheared (US). The sharing was performed at days 72 and 74 of gestation period on years 2010 and 2011, respectively. At the lambing time the ewes were observed during the entering labour time. In the 2010 lambing time only the lamb birth weight was taken. On the other hand, in 2011 beyond the birth weight of lambs, placental weight and lamb blood samples were collected for haematological analyses. The mean birth weight of the lambs from groups S and US observed were 5,56kg (±1,2) and 4,84kg (±0,9) in 2010 and 5,57kg (±1,07) and 4,32kg (±1,1) in 2011 (p<0,05). The placental mean weight from ewes of groups S and US were 497,5g (±98,2) and 380g (±133,5), respectively (p<0,05).The haematocrit mean value of lambs from S ewes was lower (43%) than the lambs from the US ewes (46%) (p<0,05). The lactate blood level from lambs born from S an US ewes did not show any significance difference. Finally, the data did not show any correlation (p>0,05) between the SC of ewes at lambing time and lamb birth weight in both groups on the two consecutive observation years.

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8

Gustafsson, Emil. "Experiments on Sheet Metal Shearing." Licentiate thesis, Högskolan Dalarna, Materialteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:du-21356.

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9

Gustafsson, Emil. "Design and application of experimental methods for steel sheet shearing." Doctoral thesis, Högskolan Dalarna, Materialteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:du-23382.

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Shearing is the process where sheet metal is mechanically cut between two tools. Various shearing technologies are commonly used in the sheet metal industry, for example, in cut to length lines, slitting lines, end cropping etc. Shearing has speed and cost advantages over competing cutting methods like laser and plasma cutting, but involves large forces on the equipment and large strains in the sheet material. The constant development of sheet metals toward higher strength and formability leads to increased forces on the shearing equipment and tools. Shearing of new sheet materials imply new suitable shearing parameters. Investigations of the shearing parameters through live tests in the production are expensive and separate experiments are time consuming and requires specialized equipment. Studies involving a large number of parameters and coupled effects are therefore preferably performed by finite element based simulations. Accurate experimental data is still a prerequisite to validate such simulations. There is, however, a shortage of accurate experimental data to validate such simulations. In industrial shearing processes, measured forces are always larger than the actual forces acting on the sheet, due to friction losses. Shearing also generates a force that attempts to separate the two tools with changed shearing conditions through increased clearance between the tools as result. Tool clearance is also the most common shearing parameter to adjust, depending on material grade and sheet thickness, to moderate the required force and to control the final sheared edge geometry. In this work, an experimental procedure that provides a stable tool clearance together with accurate measurements of tool forces and tool displacements, was designed, built and evaluated. Important shearing parameters and demands on the experimental set-up were identified in a sensitivity analysis performed with finite element simulations under the assumption of plane strain. With respect to large tool clearance stability and accurate force measurements, a symmetric experiment with two simultaneous shears and internal balancing of forces attempting to separate the tools was constructed. Steel sheets of different strength levels were sheared using the above mentioned experimental set-up, with various tool clearances, sheet clamping and rake angles. Results showed that tool penetration before fracture decreased with increased material strength. When one side of the sheet was left unclamped and free to move, the required shearing force decreased but instead the force attempting to separate the two tools increased. Further, the maximum shearing force decreased and the rollover increased with increased tool clearance. Digital image correlation was applied to measure strains on the sheet surface. The obtained strain fields, together with a material model, were used to compute the stress state in the sheet. A comparison, up to crack initiation, of these experimental results with corresponding results from finite element simulations in three dimensions and at a plane strain approximation showed that effective strains on the surface are representative also for the bulk material. A simple model was successfully applied to calculate the tool forces in shearing with angled tools from forces measured with parallel tools. These results suggest that, with respect to tool forces, a plane strain approximation is valid also at angled tools, at least for small rake angles. In general terms, this study provide a stable symmetric experimental set-up with internal balancing of lateral forces, for accurate measurements of tool forces, tool displacements, and sheet deformations, to study the effects of important shearing parameters. The results give further insight to the strain and stress conditions at crack initiation during shearing, and can also be used to validate models of the shearing process.

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10

Sikora, Marek. "Návrh výroby nástěnného držáku na kolo." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417095.

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This master’s thesis presents a proposal for the technology of manufacturing sheet metal part, which is a part of a bicycle wall bracket. The component is made of steel sheet ČSN 11 325 with subsequent surface treatment by galvanizing. Due to the chosen method of manufacturing with a progressive stamping die, the research part is focused on the technology of shearing and bending. Technological calculations were performed for the most suitable production variant, on the basis of which a mechanical press ANDRITZ Metals with the designation KSTU 2000-20-4G-PSE was chosen. Furthermore, the design of the tool itself is presented, which is substantiated by drawing documentation. At the end of the work, a technical and economic evaluation of the produced series of 300 000 workpieces per year is calculated.

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Books on the topic "Sheep shearing"

1

New Zealnd. New Zealand Wool Board. The shearing handbook. Wellington: The Shearing Service, New Zealand Wool Board, 1993.

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2

Ford, Kevin. Shearing day: Sheep handling, wool science, and shearing with blades. Charlemont, Mass: Feet on the Ground Press, 1999.

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3

Marsh, Bill. Great Australian shearing stories. Sydney, N.S.W: ABC Books, 2007.

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4

Marsh, Bill. Great Australian shearing stories. Sydney, N.S.W: ABC Books, 2007.

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Marsh, Bill. Great Australian shearing stories. Sydney, N.S.W: ABC Books, 2007.

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Canada. Dept. of Agriculture. Sheep and Goat Division., ed. Preparing wool for market. Ottawa: Dept. of Agriculture, 1997.

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Piñeiro, Diego. Trabajadores de la esquila: Pasado y presente de un oficio rural. [Montevideo, Uruguay]: Secretariado Uruguayo de la Lana, 2003.

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Paladino, Catherine. Spring fleece: A day of sheep shearing. Boston: Joy Street Books, 1990.

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Long, Murray. Breeding stud sheep. Collingwood, Vic: Land Links, 2008.

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Tapper, Joan. Shear spirit: Ten fiber farms, twenty patterns, and miles of spirit / Joan Tapper ; photography by Gale Zucker. New York: Potter Craft, 2008.

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Book chapters on the topic "Sheep shearing"

1

Draper, R. P. "Spring-Summer: The Sheep-Shearing Festival." In The Winter’s Tale, 27–33. London: Macmillan Education UK, 1985. http://dx.doi.org/10.1007/978-1-349-06739-8_5.

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Barber, A., and R. B. Freeman. "Design of sheep yards and shearing sheds." In Livestock handling and transport, 229–38. Wallingford: CABI, 2019. http://dx.doi.org/10.1079/9781786399151.0229.

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Prabhakar, Srijan, Prabhat Kumar, Subir Kumar Saha, D. Ravi Kumar, and Deepak Kumar. "Failure Analysis of Comb for Sheep Hair Shearing Device." In Design Science and Innovation, 137–44. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6435-8_9.

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Sinha, Sasanka Sekhar, and Subir Kumar Saha. "Dynamic Modeling of a Sheep Hair Shearing Device Using RecurDyn and Its Verification." In IUTAM Symposium on Intelligent Multibody Systems – Dynamics, Control, Simulation, 165–74. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-00527-6_9.

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Sharma, Ganesh Kumar, Deepak Kumar, and Subir Kumar Saha. "Tribology of Steel–Steel Contact: Comb-Cutter Assembly for Sheep Hair Shearing Device Developed at IIT Delhi." In Design Science and Innovation, 153–65. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6435-8_11.

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Hsu, Yuan Chuan, and Tung Sheng Yang. "A Predictive Model Construction for the Sheared Planes in Sheet Metal Shearing Process." In Optics Design and Precision Manufacturing Technologies, 590–94. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-458-8.590.

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Allouch, Marwa, Abir Bouhamed, Mondher Wali, and Fakhreddine Dammak. "Numerical Investigation on Sheet Shearing Process of an Elastoplastic Metal Material with Damage Model." In Lecture Notes in Mechanical Engineering, 54–62. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-57324-8_7.

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Quadir, M. Z., O. Al-Buhamad, L. Bassman, and M. Ferry. "Texture Randomization by Intense Shearing in Layered Al and Al(0.3%Sc) ARB-Processed Sheet." In Ceramic Transactions Series, 783–90. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470444191.ch88.

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"sheep-shearing, n." In Oxford English Dictionary. 3rd ed. Oxford University Press, 2023. http://dx.doi.org/10.1093/oed/5575583994.

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Zola, Émile. "Chapter 1." In Earth. Oxford University Press, 2016. http://dx.doi.org/10.1093/owc/9780199677870.003.0024.

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Since the month of May, after the shearing and the sale of the young stock animals, Soulas the shepherd had taken the sheep out of La Borderie, driving nearly four hundred animals on his own, with the little swineherd Auguste and his two dogs,...

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Conference papers on the topic "Sheep shearing"

1

Robinson, Mark, Ying Tan, Kusal Goonewardena, Denny Oetomo, and Chris Manzie. "Evaluation of ceiling-supported back harnesses in preventing injury in sheep shearing." In 2021 43rd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC). IEEE, 2021. http://dx.doi.org/10.1109/embc46164.2021.9629719.

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Robinson, Mark, Lei Lu, Ying Tan, Kusal Goonewardena, Denny Oetomo, and Chris Manzie. "Enabling context aware data analysis for long-duration repetitive stooped work through human activity recognition in sheep shearing." In 2020 42nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) in conjunction with the 43rd Annual Conference of the Canadian Medical and Biological Engineering Society. IEEE, 2020. http://dx.doi.org/10.1109/embc44109.2020.9175839.

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Robinson, Mark, Raphael Mayer, Ying Tan, Denny Oetomo, and Chris Manzie. "Effects of varying the rest period on the onset angle of lumbar flexion-relaxation in simulated sheep shearing: a preliminary study." In 2019 IEEE 16th International Conference on Rehabilitation Robotics (ICORR). IEEE, 2019. http://dx.doi.org/10.1109/icorr.2019.8779480.

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Shaw, B. "ANDRITZ Metals, HXT Knife Technology for Shearing Advanced High-Strength Steel." In International Symposium on New Developments in Advanced High-Strength Sheet Steels. Association for Iron & Steel Technology, 2023. http://dx.doi.org/10.33313/298/026.

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Dietrich, F. "High speed impact cutting of continuous fiber reinforced thermoset plastics." In Sheet Metal 2023. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902417-39.

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Abstract. Endless fiber-reinforced plastics are being used to an increasing extent as alternative materials for highly stressed or lightweight components instead of metallic materials. In order to achieve the geometric requirements, peripheral machining of the raw parts is necessary. Instead of the currently mainly used cutting processes, which are not suitable for clocked production, high-speed impact cutting (HSIC) was examined in the presented experiments. This technology is known as adiabatic cutting from the processing of metallic materials. Due to the high process energy which is released in a very short time resulting in high punch speed, the prevailing separation mechanism changes. Instead of bending the fibers due to the shear force the high-speed cutting experiments with a punch speed of 10 m/s lead to a brittle shearing of the glass fibers and a locally very limited heating and hence softening of the matrix material resulting in a clean surface of the cut specimen. The inter fiber breakage, meaning the separation between fibers and matrix called delamination, can be avoided or at least be sealed at the surface due to heat induced smearing of the matrix material. The resulting surface quality of the cutting edge is exceptionally good. However, the technically necessary cutting clearance leads to a jump in diameter within the cut surface.

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Hertzel, A. "Investigation on the shear cutting of functional components manufactured in an orbital forming process." In Sheet Metal 2023. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902417-8.

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Abstract. Applying forming operations for the manufacturing of complex functional components instead of conventional shearing or milling is an effective way to increase the material efficiency of the process as well as the mechanical properties of the part. Nevertheless, in many cases subsequent cutting operations are mandatory to reach the final geometry or to add functional surfaces for the later assembly. During forming, hardening effects or different strain states can cause difficulties for the subsequent cutting operation. These characteristics are commonly determined for sheet metal forming processes like deep drawing or bending. However, the complex stress and strain states during sheet-bulk metal forming operations and their influence on the cutting parameters or the part properties have not been investigated comprehensively so far. Furthermore, different assigned processes, like for example orbital forming, allow a local material distribution, realizing a gradient in sheet thickness. Therefore, this contribution focuses on the establishment of a fundamental process understanding on the influence of a sheet-bulk metal forming process on the cutting parameters and the resulting part properties. Functional components are manufactured from C10 sheet metal by orbital forming and subsequently shear cut to generate the final contour. During cutting, specific force-stroke diagrams are evaluated, in order to analyze the influence on the process parameters. The resulting properties of the parts are investigated regarding the quality of the cutting surface and a potential geometrical distortion in consequence of elastic spring back. The influence of the forming process is outlined by a direct comparison with conventionally cut components.

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FUCHS, BURKHARD. "DENSITY WAVE THEORY OF GALACTIC SPIRAL ARMS. THE SHEARING SHEET MODEL." In Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF). World Scientific Publishing Company, 2006. http://dx.doi.org/10.1142/9789812704030_0340.

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Golovashchencko, S. F., R. G. Davies, and W. S. Stewart. "Influence of Tooling Geometry on the Quality of Aluminum Sheet Shearing Surface." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1997. http://dx.doi.org/10.4271/970716.

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Moravec, Ján. "SHEARING OF SHEET METAL INSIDE THE TOOL WITH THE INTERNAL HEATING CUTTING PUNCH." In METAL 2019. TANGER Ltd., 2019. http://dx.doi.org/10.37904/metal.2019.682.

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Nehme, Christopher R., Amrit Sagar, William C. Messner, and Thomas P. James. "Fabrication and Investigation of a Micro-Progressive Die Set for Microforming of Sheet Metals." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36933.

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Progressive microforming is an attractive option for manufacturing high aspect-ratio micro-parts out of sheet metal. It is a highly economical alternative to both MEMS processing and micro-machining due to the ability to produce near-net shape parts through parallel forming processes. Current limitations in the field include precise alignment of microforming tools and an understanding of forces encountered when scaling down traditional forming processes. A five stage micro-progressive aluminum die set consisting of four shearing stages and one bending stage was fabricated by micro-machining. The die set was designed to produce right angle micro-brackets from 25 um thick annealed copper foil, with a measured average grain size of 47 um. Die clearances were set at 3 um along shearing edges and 38 um along the bending edge, corresponding to 12% and 152% material thickness, respectively. The produced micro-brackets are intended to be used as electrical connectors and consist of a nominally 280 um by 260 um tab extending vertically from a 780 um by 260 um base. In order to implement and investigate the progressive microforming process, a novel micro-press system was constructed which allows for precision alignment of the die set and workpiece. Using a prepared workpiece, forces at the first stage of the die set were measured and compared to analytical predictions based on models from the literature.

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