Academic literature on the topic 'Rolling oil'

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Journal articles on the topic "Rolling oil"

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DRAHL, CARMEN. "ROLLING OUT THE OIL." Chemical & Engineering News 85, no. 50 (December 10, 2007): 7. http://dx.doi.org/10.1021/cen-v085n050.p007.

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TANIKAWA, Keiichi. "Surface chemistry of cold rolling oil." Hyomen Kagaku 10, no. 7 (1989): 448–55. http://dx.doi.org/10.1380/jsssj.10.448.

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Latifi, Seyedmorteza. "Effect of Shear Strength of Oil on Lubrication of Cold Strip Rolling in Full-Fil Regime." Logic : Jurnal Rancang Bangun dan Teknologi 20, no. 3 (November 30, 2020): 135–40. http://dx.doi.org/10.31940/logic.v20i3.1811.

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Cold strip rolling is a major deformation process in industry. The need for high quality products and increased production speed, makes the application of the lubricant important. In the present study, oil property effect is investigated in cold rolling using oil lubricant in full-film lubrication regime. The model predicts decisive role of oil property in rolling parameters.
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Peng, Liang Gui, Xian Lei Hu, Xu Li, Dian Hua Zhang, Gui Ling Yang, and Zhong Liang Wu. "Development and Application of Hot Rolling Lubrication Control System Based on Expert System." Advanced Materials Research 442 (January 2012): 366–69. http://dx.doi.org/10.4028/www.scientific.net/amr.442.366.

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To integrate a new roll gap lubrication system into an existing hot strip mill is a challenge problem. A lubrication expert system was developed and embedded into finish rolling setup system. The reference value setup by expert system is downloaded to roll bite lubrication PLC via finish mill PLC to open oil spraying valve and regulate the oil concentration. Oil spraying time sequence is an important factor to make good lubrication effect and to keep the rolling process stable. Since online application of the hot rolling lubrication system, rolling force and work roll wear has been reduced dramatically, especially rolling thin strip.
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OKAMOTO, Takahiko. "Simulation of Rolling Slip and Rolling Oil Conditions in Cold Rolling of High-Strength Steel." Journal of the Japan Society for Technology of Plasticity 61, no. 710 (2020): 81–85. http://dx.doi.org/10.9773/sosei.61.81.

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Qian, Cheng, Zhenhua Bai, Jiasheng Zhang, Yaya Cui, and Changchun Hua. "Formation Mechanism and Influence Factors of Roll Surface Oil Film Thickness in the Double Cold Reduction Mill." Mathematical Problems in Engineering 2020 (May 21, 2020): 1–10. http://dx.doi.org/10.1155/2020/6746828.

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In the double cold rolling process, the emulsion entering the roll gap during the double cold rolling process has the characteristics of high concentration and small flow rate so that the roll surface oil film thickness will affect roll gap oil film thickness, which in turn affects the rolling friction coefficient. This paper analyzes the formation mechanism and evolution process of the roll surface oil film thickness by considering the equipment and process characteristics of the emulsion direct injection application lubrication system. Then, based on the principle of fluid dynamics, the roll surface oil film thickness model in the double cold rolling process is established, and the prediction of the roll surface oil film thickness during the double cold rolling process is realized. Subsequently, the effects of five factors, such as rolling speed, work roll roughness, maximum contact stress between rolls, emulsion initial dynamic viscosity, and emulsion pressure viscosity coefficient, on the roll surface oil film thickness are quantitatively analyzed, and the corresponding influence laws are given. Finally, the relevant model and software that are applied to the 1220 double cold reduction mill have achieved good results.
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Wu, C. W., G. J. Ma, and H. S. Sun. "Viscoplastic Lubrication Analysis in a Metal-Rolling Inlet Zone Using Parametric Quadratic Programming." Journal of Tribology 127, no. 3 (March 16, 2005): 605–10. http://dx.doi.org/10.1115/1.1924576.

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A mathematical programming solution based on finite element method is used to analyze wall slip of viscoplastic lubrication in a metal-rolling inlet zone. Slip velocity can be directly obtained by parametric quadratic programming without an iterative process between the oil film pressure and the slip velocity. It is found that wall slip causes the oil film thickness to decrease dramatically. The initial limiting shear strength and proportional constant of the viscoplastic lubricant have a larger effect on the oil film pressure than the rolling speed. The nonsensitivity of oil film thickness to the rolling speed is a great particular advantage to metal-rolling processing.
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Wang, S. H., A. Z. Szeri, and K. R. Rajagopal. "Lubrication With Emulsion in Cold Rolling." Journal of Tribology 115, no. 3 (July 1, 1993): 523–31. http://dx.doi.org/10.1115/1.2921669.

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Petroleum oil-in-water emulsion, where water is the continuous phase, is often employed under circumstances where the high heat capacity of water is beneficial while the poor lubricating properties of an oil-in-water emulsion can be tolerated. Usage includes cold-rolling but also some hot rolling applications. However, emulsions do not exhibit Newtonian behavior even when their individual components themselves are Newtonian, thus classical lubrication theory is not valid for these applications. In this paper we employ the extended Reynolds equations of Al-Sharif et al., derived for binary mixture lubricants, to study strip-rolling lubricated with oil-in-water emulsion. We are able to predict several experimentally observed phenomena such as oil-pooling, enhancement of oil-pooling with increased strip yield stress and with increased roller speed.
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Huang, Fuchuan, Fukang Deng, Kang-Chun Li, and Ke Qin. "Development of special lubricant for the copper belt cold rolling." Industrial Lubrication and Tribology 68, no. 5 (August 8, 2016): 586–90. http://dx.doi.org/10.1108/ilt-09-2015-0126.

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Purpose Aiming at the high temperature, high speed, high precision and high surface quality of the copper belt cold rolling, the purpose of this paper is to develop a new type of lubricant for cold rolled copper belt. Design/methodology/approach The component of the developed oil was determined based on the physical and chemical properties of the base oil and the tribological properties, the oxidation resistance properties, the rust resistance properties, the anti-foam properties, the demulsibility and the other properties of the additives. The orthogonal experiment method was used to determine the optimum adding amount of the additives; finally, the developed oil formulation was determined. Findings The physical and chemical experiment results show that the developed oil has a good performance of oil film bearing capacity and oxidation resistance. The simulation of rolling experiment found that the developed oil can significantly reduce rolling pressure and effectively reduce the friction in the process of rolling. Originality/value The experimental results show that the developed oil has excellent performance and can meet the requirement of lubrication in the process of cold rolling copper belt.
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Yan, Pengfei, Changfeng Yan, Kai Wang, Fengtao Wang, and Lixiao Wu. "5-DOF Dynamic Modeling of Rolling Bearing with Local Defect considering Comprehensive Stiffness under Isothermal Elastohydrodynamic Lubrication." Shock and Vibration 2020 (June 22, 2020): 1–15. http://dx.doi.org/10.1155/2020/9310278.

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The sliding of the rolling element in the load zone would cause the bearing’s wear and failure at high speed under elastohydrodynamic lubrication (EHL) condition. Aiming at this phenomenon, considering lubrication oil film, time-varying displacement, radial clearance, and comprehensive stiffness, a five degree-of-freedom (DOF) dynamic model of rolling bearing with local defect is proposed based on isothermal EHL and which is validated by experimental data. The variation of oil film stiffness, comprehensive stiffness, and vibration characteristics of rolling bearing is studied under different speeds and loads. The results show that the lubricating oils with different viscosities have a certain influence on the bearing oil film thickness and comprehensive stiffness. As the load increases, the oil film stiffness and comprehensive stiffness would increase, and the oil film thickness would decrease. And as the tangential speed increases, the oil film stiffness would increase, and the oil film thickness and comprehensive stiffness would decrease. The vibration amplitude of the rolling bearing is enhanced with the increase of the rotation speed and the radial load. This model is helpful for the optimization, the correct use of lubricants, and life prediction of rolling bearing.
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Dissertations / Theses on the topic "Rolling oil"

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Ratoi, Monica. "The design of lubricating oil in water emulsions." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243558.

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Lu, Lu. "Technico-economic evaluation of used rolling oil treatment between UCO module and conventional process in China." Thesis, KTH, VA-teknik, Vatten, Avlopp och Avfall, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99355.

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UCO (Ultra Clean Oil) module, an innovative adaption of existing used rolling oil treatment in the Aluminum industry, is being studied for its potential market in China. In this article, conventional used rolling oil treatment process in China has been evaluated and compared with the UCO module in technical and economic aspects. This article also discusses the effect of these two processes on the environment. The UCO module presented in this article, has the potential to significantly reduce the impurities in the used rolling oil and also save the cost for the raw materials, manpower, maintenance and operation for more than 1,600,000 Kr a year. With the new ― state of art‖ equipment, the UCO module has less negative effect on the environment. The UCO module appears to be more efficient but profitability was found to be lower than the conventional process in China.
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Pillar, Rachel Joanne, and rachel pillar@flinders edu au. "The Influence of Rolling Oil Decomposition Deposits on the Quality of 55Al-43.4Zn-1.6Si Alloy Coatings." Flinders University. School of Chemistry, Physics and Earth Sciences, 2007. http://catalogue.flinders.edu.au./local/adt/public/adt-SFU20080108.132120.

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Uncoated defects in hot dip metal-coated steel products result from non-wetting of the steel surface by the molten alloy. The occurrence of uncoated defects is highly detrimental to product quality and production efficiency; uncoated defects compromise the appearance and anti-corrosion performance of hot dip metal-coated steel products and causes time delays in the application of subsequent surface treatments. Although many studies have been directed towards evaluating the effect of steel pre-heat temperature and oxidation on the formation of uncoated defects, fewer investigations have analysed how oil-derived residues remaining on steel surface following the cold rolling and furnace cleaning processes impact upon hot dip metallic coating quality. Furthermore, although a considerable amount of research has focussed on the process of deposit formation in lubricants used in other applications, the composition of oily residues remaining after the continuous annealing process, and the origins of these residues in the original rolling oil formulation, are poorly understood. The primary focus of the present work has been to gain an improved understanding of relationships between cold rolling oil composition, oil residue-formation characteristics and the occurrence of uncoated defects in 55Al-43.4Zn-1.6Si hot dip metallic coatings. Several key classes of rolling oil ingredients which decompose to leave high levels of thermally-stable residue have been identified. The thermal decomposition processes undergone by a variety ingredients within these classes have been studied under both oxidising and reducing conditions using Thermogravimetric Analysis (TGA) and Pressure Differential Scanning Calorimetry (PDSC) techniques, with chemical characterisation of the decomposition process and the resultant thermally-stable residue by infrared spectroscopy. Model blends of each ingredient in a typical cold rolling oil base ester have also been evaluated by TGA and PDSC to identify the impact of ingredient concentration and chemical structure on the amount of oily residue formed. The results of these investigations have been related to the impact of the ingredients on 55Al-43.4Zn-1.6Si hot dip metallic coating quality through the performance of industrial-scale hot dipping trials and hot dip simulation studies. In order to translate these results into a context more closely aligned with industrial conditions, the effect of processing variables, including furnace atmosphere and the availability/concentration of iron in contact with the rolling oil at the steel surface, on the decomposition process of a fully-formulated commercial cold rolling oil has also been investigated. The information gained can potentially be used to tailor operating conditions within the cold rolling/continuous hot dip metallic coating processes to enhance steel surface cleanliness. Finally, the deposit-forming tendencies of an array of different commercial cold rolling oils have been evaluated, leading to the development of a thermal analysis-based test for screening cold rolling oils with respect to their likely impact upon 55Al-43.4Zn-1.6Si hot dip metallic coating quality. This test, together with the understanding obtained on the effect of different rolling oil ingredients on hot dip metallic coating quality, can be used within the industry to formulate improved cold rolling oils.
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Ferreira, Adriano Domingos. "Simulação do escoamento bifásico da mistura óleo-refrigerante através da folga radial de compressores rotativos de pistão rolante /." Ilha Solteira : [s.n.], 2006. http://hdl.handle.net/11449/88881.

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Orientador: José Luiz Gasche
Banca: André Luiz Seixlack
Banca: Paulo Eduardo Lopes Barbieri
Resumo: Devido à solubilidade mútua entre o fluido refrigerante e o fluido lubrificante usados em sistemas de refrigeração por compressão de vapor, eles formam uma mistura homogênea que influencia tanto os processos de transferência de calor no evaporador e no condensador, como os processos de lubrificação e de selagem de vazamentos no interior do compressor. O vazamento de refrigerante através da folga radial de compressores rotativos de pistão rolante é de particular importância para o bom desempenho do compressor, uma vez que ele influencia significativamente a eficiência volumétrica do compressor, chegando a somar cerca de 30% das perdas totais de refrigerante. No presente trabalho foram desenvolvidos modelos de escoamento de misturas óleo-refrigerante através desta folga, incluindo a mudança de fase do refrigerante devida à variação da sua solubilidade no lubrificante. A solução da equação da energia constitui uma evolução do processo de modelagem deste escoamento em relação aos modelos até então desenvolvidos. Quatro modelos diferentes foram usados para simular o escoamento: modelo de escoamento bifásico homogêneo isotérmico, modelo de escoamento bifásico isotérmico com formação de espuma, modelo de escoamento bifásico homogêneo não-isotérmico e modelo de escoamento bifásico homogêneo não-isotérmico com termo de força inercial. O estudo foi realizado para três misturas óleo-refrigerante: óleo éster Freol a10 e refrigerante R134a, óleo éster EMKARATE RL10H e refrigerante R134a e óleo mineral SUNISO 1 GS e refrigerante R12. Para todos os modelos e misturas, realizou-se um estudo paramétrico envolvendo as principais variáveis do problema: pressão de entrada, temperatura de entrada, vazão de mistura e valor da folga mínima... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Due to the mutual solubility between the refrigerant and lubricant of refrigeration systems using mechanical compression of vapor, they form a homogeneous mixture which influences the heat transfer processes in the evaporator and condenser as well as the compressor lubrication and refrigerant leakage. The refrigerant leakage through the radial clearance of rolling piston compressors plays an important role to the volumetric efficiency in this type of compressor, in which it represents about 30% of the total refrigerant loss. In the present work several models to predict the lubricant-refrigerant mixture flow through this clearance, including the refrigerant phase change due to the reduction of the refrigerant solubility in the lubricant, are developed. Four different models were developed to simulate the flow: isothermal homogeneous two-phase flow, isothermal two-phase flow with foam formation, non-isothermal homogeneous two-phase flow and non-isothermal homogeneous two-phase flow containing inertial force. The simulations were performed for three mixtures: ester oil Freol a10-refrigerant R134a, ester oil EMKARATE RL10H-refrigerant R134a, and mineral oil SUNISO 1 GS-refrigerant R12. The influences of the inlet pressure, inlet temperature, mixture mass flow rate, and minimal clearance were analyzed for all mixtures. The results showed that it is important to consider the foam formation, the inertial force, and the solution of the energy equation in the flow modeling. Concerning the volumetric efficiency of the compressor the ester oil Freol a10-R134a was the best mixture because it produced the lowest refrigerant leakage.
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Ferreira, Adriano Domingos [UNESP]. "Simulação do escoamento bifásico da mistura óleo-refrigerante através da folga radial de compressores rotativos de pistão rolante." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/88881.

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Devido à solubilidade mútua entre o fluido refrigerante e o fluido lubrificante usados em sistemas de refrigeração por compressão de vapor, eles formam uma mistura homogênea que influencia tanto os processos de transferência de calor no evaporador e no condensador, como os processos de lubrificação e de selagem de vazamentos no interior do compressor. O vazamento de refrigerante através da folga radial de compressores rotativos de pistão rolante é de particular importância para o bom desempenho do compressor, uma vez que ele influencia significativamente a eficiência volumétrica do compressor, chegando a somar cerca de 30% das perdas totais de refrigerante. No presente trabalho foram desenvolvidos modelos de escoamento de misturas óleo-refrigerante através desta folga, incluindo a mudança de fase do refrigerante devida à variação da sua solubilidade no lubrificante. A solução da equação da energia constitui uma evolução do processo de modelagem deste escoamento em relação aos modelos até então desenvolvidos. Quatro modelos diferentes foram usados para simular o escoamento: modelo de escoamento bifásico homogêneo isotérmico, modelo de escoamento bifásico isotérmico com formação de espuma, modelo de escoamento bifásico homogêneo não-isotérmico e modelo de escoamento bifásico homogêneo não-isotérmico com termo de força inercial. O estudo foi realizado para três misturas óleo-refrigerante: óleo éster Freol a10 e refrigerante R134a, óleo éster EMKARATE RL10H e refrigerante R134a e óleo mineral SUNISO 1 GS e refrigerante R12. Para todos os modelos e misturas, realizou-se um estudo paramétrico envolvendo as principais variáveis do problema: pressão de entrada, temperatura de entrada, vazão de mistura e valor da folga mínima...
Due to the mutual solubility between the refrigerant and lubricant of refrigeration systems using mechanical compression of vapor, they form a homogeneous mixture which influences the heat transfer processes in the evaporator and condenser as well as the compressor lubrication and refrigerant leakage. The refrigerant leakage through the radial clearance of rolling piston compressors plays an important role to the volumetric efficiency in this type of compressor, in which it represents about 30% of the total refrigerant loss. In the present work several models to predict the lubricant-refrigerant mixture flow through this clearance, including the refrigerant phase change due to the reduction of the refrigerant solubility in the lubricant, are developed. Four different models were developed to simulate the flow: isothermal homogeneous two-phase flow, isothermal two-phase flow with foam formation, non-isothermal homogeneous two-phase flow and non-isothermal homogeneous two-phase flow containing inertial force. The simulations were performed for three mixtures: ester oil Freol a10-refrigerant R134a, ester oil EMKARATE RL10H-refrigerant R134a, and mineral oil SUNISO 1 GS-refrigerant R12. The influences of the inlet pressure, inlet temperature, mixture mass flow rate, and minimal clearance were analyzed for all mixtures. The results showed that it is important to consider the foam formation, the inertial force, and the solution of the energy equation in the flow modeling. Concerning the volumetric efficiency of the compressor the ester oil Freol a10-R134a was the best mixture because it produced the lowest refrigerant leakage.
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Mogwaneng, Pheladi Junior. "Optimization of rolling mill oils evaluation using FT-IR spectroscopy." Diss., Pretoria : [s.n.], 2004. http://upetd.up.ac.za/thesis/available/etd-08132008-103521.

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Sikora, Vojtěch. "Optimalizace mazacího systému pro mazání ložisek válcovacích stolic." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443758.

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The thesis focuses on the optimization of the central lubrication system for the lubrication of rolling bearings of rolling mills in the operation continuous wire rod mill. The work is divided into theoretical and practical part. The first part of the theoretical work is focuses on the search of rolling and tribodiagnostics. The next part focuses on the description of modern central lubrication systems, explanation of their principle and practical use. The practical part explains the function of the old lubrication system for rolling mill bearings with an analysis of its problems. Next is described the technical design of a new central lubrication system, its application into operation and its actual commissioning are described. The last part of the thesis is the conclusion and evaluation of the benefits of the new central lubrication system compared to the old one.
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Ferreira, Paula Benvindo. "A ação tocolítica do óleo essencial de rollinia leptopetala r. E. Fries envolve a modulação positiva dos canais de potássio em útero isolado de rata." Universidade Federal da Paraíba, 2014. http://tede.biblioteca.ufpb.br:8080/handle/tede/9483.

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Rollinia leptopetala R. E. Fries species, popularly known as “pinha-brava”, “bananinha” and “pereiro”, and traditionally cited as digestive. From R. leptopetala leaves was extracted an essential oil (RL-OE) that showed tocolytic effect in carbachol- (CCh) and oxytocin-induced phasic contractions on rat uterus. Thus, we aimed characterize the mechanism of tocolytic action of RL-OE using by functional techniques. Since the mechanisms to induce the phasic contractions are distinct from the tonic ones, we decided to evaluate whether RL-OE would relax rat uterus pre-contracted with KCl or oxytocin. The essential oil relaxed pre-contracted with 60 mM KCl (EC50 = 22.4 ± 2.4 μg/mL) or 10-2 UI/mL oxytocin (EC50 = 4.1 ± 0.4 μg/mL). After, it was hypothesized that RL-OE would antagonize oxytocin receptors, and this hypothesis was confirmed since cumulative concentration-response curves to oxytocin were inhibited, shifted to the right, in a non-parallel manner and with Emax reduction, discarding a competitive antagonism. The participation of adrenergic receptors was also evaluated. For this, phentolamine (an antagonist of α-receptors) was used, but none change in RL-OE tocolytic potency was observed, being discarded the involvement of this receptor. Additionally, propranolol (an antagonist of β-receptors) was used and the relaxation curve induced by RL-OE, in the blocker presence, was shifted to the left, with potentiation of oil effect and rejecting the hypothesis of β-receptors activation. Other pathways that modulate the myometrium contractility are nitric oxide (NO) and Cyclooxygenase (COX) pathways. The involvement of them in tocolytic mechanism of RL-OE was investigated using L-NAME and indomethacin, inhibitors of NO and COX pathways, respectively. However, RL-OE effect was not altered in the presence of inhibitors, discarding their contribution. The participation of K+ channels was developed using non-selective and selective blockers of them. The tocolytic potency of RL-OE (EC50 = 4.1 ± 0.4 μg/mL) was reduced 2.2 fold in the presence of 5 mM CsCl (EC50 = 8.9 ± 1.1 μg/mL), a non-specific blocker K+ channels, indicating participation of these channels. To investigate which subtypes of K+ channels would be involved selective K+ channels blockers were used. In the presence of 1 mM TEA+, blocker of large conductance calcium-activated K+ channels (BKCa), apamin, blocker of small conductance calcium-activated K+ channels (SKCa) and glibenclamide, blocker of ATP-sensitive potassium channel (KATP) did not changed the tocolytic action of RL-OE, showing that BKCa, SKCa and KATP are not involved. Interestingly, the relaxation curve induced by RL-OE was shifted to the right in the presence of 4- aminopyridine, blocker of voltage-gated K+ channels (KV), with reduction of RL-OE potency (EC50 = 10 ± 0.6 μg/mL), indicating KV participation in the mechanism of tocolytic action of RL-OE on rat uterus. Therefore, the tocolytic mechanism of RL-OE involves the positive modulation the K+ channels, in special KV subtypes, that indirectly blockade of voltage-gated Ca2+ channels (CaV) leading to uterine smooth muscle relaxation.
A espécie Rollinia leptopetala R. E. Fries, conhecida popularmente como “pinha-brava”, “bananinha” e “pereiro”, é utilizada tradicionalmente como digestiva. Das folhas dessa espécie foi extraído o óleo essencial (RL-OE), que, em estudos anteriores, apresentou atividade tocolítica frente às contrações fásicas induzidas por carbacol (CCh) ou ocitocina em útero isolado de rata. Assim, o objetivo desse trabalho foi caracterizar o mecanismo de ação tocolítica do RL-OE, por meio de metodologias funcionais. Como os mecanismos para indução da contração fásica são diferentes dos que mantém a tônica, decidiu-se verificar se o RL-OE relaxaria o útero pré-contraído com KCl ou ocitocina. O óleo relaxou o útero pré-contraído com 60 mM de KCl (CE50 = 22,4 ± 2,4 μg/mL) ou com 10-2 UI/mL de ocitocina (CE50 = 4,1 ± 0,4 μg/mL), sendo mais potente para ocitocina. Em seguida, hipotetizou-se que o RL-OE estaria antagonizando os receptores de ocitocina, sendo essa hipótese confirmada, uma vez que, observou-se a inibição das curvas concentrações-resposta cumulativas à ocitocina, desviando-as para a direita, de maneira não paralela e com redução do seu Emax, descartando-se um antagonismo do tipo competitivo. A participação dos receptores adrenérgicos foi avaliada. Para isso, utilizou-se a fentolamina, um antagonista dos receptores α, entretanto não houve alteração da potência tocolítica do RL-OE, sendo descartado o antagonismo desse receptor. Também utilizou-se o propranolol, um antagonista dos receptores adrenérgicos β, constatando-se que a curva de relaxamento, na presença do bloqueador, foi desviada para a esquerda, com potencialização do RL-OE, descartando a ativação desses receptores. Outras vias que modulam a função contrátil do miométrio uterino são as vias do óxido nítrico (NO) e da ciclo-oxigenase (COX). Investigou-se a participação dessas vias no mecanismo de ação do óleo essencial utilizando L-NAME e indometacina, inibidores das vias do NO e da COX, respectivamente. Entretanto, o efeito do RL-OE não foi alterado na presença dos inibidores, descartando a participação dessas vias no seu mecanismo de ação tocolítica. Outra via investigada foi o modulação dos canais de K+. Para isso, utilizou-se bloqueadores não-seletivo e seletivos desses canais. A potência tocolítica do RL-OE (CE50 = 4,1 ± 0,4 μg/mL) foi reduzida 2,2 vezes na presença de 5 mM de CsCl (CE50 = 8,9 ± 1,1 μg/mL), bloqueador não seletivo desses canais, confirmando a participação dos canais de K+ no efeito tocolítico do RL-OE. Para verificar qual(is) canal(is) de K+ estariam envolvidos usou-se bloqueadores seletivos desses canais. O fato do TEA+ 1 mM, bloqueador dos canais de K+ de grande condutância ativados por cálcio (BKCa); da apamina, um bloqueador dos canais de K+ ativados por Ca2+ de pequena condutância (SKCa) e da glibenclamida, bloqueador dos canais de K+ sensíveis ao ATP (KATP) não alterarem o efeito tocolítico do RL-OE indica que os BKCa, SKCa e os KATP não estariam envolvidos em seu mecanismo de ação. Entretanto, a curva concentrações-resposta de relaxamento induzida pelo RL-OE foi desviada para direita na presença de 4-aminopiridina, bloqueador dos canais de K+ dependentes de voltagem (Kv), com redução da potência tocolítica do RL-OE (CE50 = 10 ± 0,6 μg/mL), sugerindo o envolvimento dos Kv no mecanismo de ação tocolítica do RL-OE em útero de rata. Conclui-se que o RL-OE exerce efeito tocolítico modulando positivamente os canais de K+, especificamente os Kv, que bloqueariam de modo indireto os canais de cálcio dependentes de voltagem (CaV), resultando no relaxamento da musculatura lisa uterina
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Fan, Chia-Jung, and 范家榕. "Surface Roughness of Mixed Lubrication Model With Oil-in-Water Emulsions for Cold Rolling Processes." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/47663694979844393080.

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碩士
元智大學
機械工程研究所
88
A mixed lubrication model with oil-in-water emulsions for cold rolling processes is developed. The interface loading of this model is shared between the pressurized lubricant film in roughness valleys and contact at asperity peaks. So, it will not result in unconstrained grain deformation and severe metal-to-metal contact and consequent galling and pickup. Because the lubrication properties of emulsions are as well as pure oil, and emulsions have better cooling ability than pure oil, oil-in-water emulsions have been widely used as lubricants in manufacture today. Therefor, we investigated the surface roughness of mixed lubrication model with oil-in-water for cold rolling processes. In present investigation, we developed an analytical model that combines finite element code with mixed lubrication analysis and a cold rolling experiment to discuss the effect of lubricant film thickness in different emulsions properties, rolling speeds and reductions. Depend on these analyses, we finally established the relationship between surface roughness and film thickness with oil-in-water emulsion in cold rolling processes.
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Pillar, Rachel Joanne. "The influence of rolling oil decomposition deposits on the quality of 55A1-43.3Zn-1.6Si alloy coatings." 2007. http://catalogue.flinders.edu.au/local/adt/public/adt-SFU20080108.132120/index.html.

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Books on the topic "Rolling oil"

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Hood, Christopher, and Rozana Himaz. Rolling Back the State? Fiscal Squeeze, Thatcher-Style. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198779612.003.0008.

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This chapter describes two fiscal squeezes under the Conservative majority-party governments led by Margaret Thatcher in the 1980s. The first comprised a hard post-election squeeze on revenue in the middle of a major recession and mass unemployment, beginning with an abrupt hike in VAT rates in 1979 and severe tax rises in the 1981 budget. The second comprised a strategy of holding down spending increases that led to public expenditure falling relative to GDP (but not in constant price terms) over an extended period as recession was followed by economic recovery from 1983. These periods of squeeze took place in an era of deep polarization between the two main parties and bitter industrial unrest and were fuelled to a considerable extent by sharply increasing North Sea oil revenue and widespread asset sales in the form of privatization of state-owned enterprises that counted as negative expenditure.
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Association of Iron and Steel Engineers., ed. Selected bearing, lubrication, and hydraulics engineering papers. Pittsburgh, Pa. (Suite 2350, 3 Gateway Center, Pittsburgh 15222): Association of Iron and Steel Engineers, 1986.

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Book chapters on the topic "Rolling oil"

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Nguyen-Schäfer, Hung. "Oil-Film Thickness in Rolling Bearings." In Computational Design of Rolling Bearings, 63–82. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-27131-6_4.

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Zhao, Yongtao, Jianlin Sun, Guangzhao Yuan, and Chenglong Wang. "Relationship of Oil Composition and Lubricating Characteristics in Cold Rolling Aluminum Strips." In Lecture Notes in Mechanical Engineering, 697–703. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0107-0_66.

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Ma, Naiyang. "In-Process Separation of Mill Scale From Oil at Steel Hot Rolling Mills." In EPD Congress 2012, 323–29. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118359341.ch37.

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Uçar, Özlem İnanç, Hatice Mollaoğlu Altuner, Mert Günyüz, Mustafa Murat Dündar, and Durmuş Özdemir. "Determination of Aluminum Rolling Oil And Machinery Oil Residues on Finished Aluminum Sheet and Foil Using Elemental Analysis and Fourier Transform Infrared Spectroscopy Coupled with Multivariate Calibration." In Light Metals 2014, 415–20. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-48144-9_71.

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Uçar, Özlem İnanç, Hatice Mollaoǧlu, Mert Günyüz, Mustafa Murat Dündar, and Durmeş Özdemir. "Determination of Aluminum Rolling Oil and Machinery Oil Residues on Finished Aluminum Sheet and Foil Using Elemental Analysis and Fourier Transform Infrared Spectroscopy Coupled with Multivariate Calibration." In Light Metals 2014, 415–20. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118888438.ch71.

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Azimova, Shakhnoza S., and Anna I. Glushenkova. "Lesquerella densipila Rollins." In Lipids, Lipophilic Components and Essential Oils from Plant Sources, 251. London: Springer London, 2012. http://dx.doi.org/10.1007/978-0-85729-323-7_801.

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Azimova, Shakhnoza S., and Anna I. Glushenkova. "Lesquerella lyrata Rollins." In Lipids, Lipophilic Components and Essential Oils from Plant Sources, 254. London: Springer London, 2012. http://dx.doi.org/10.1007/978-0-85729-323-7_811.

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Azimova, Shakhnoza S., and Anna I. Glushenkova. "Lesquerella perforate Rollins." In Lipids, Lipophilic Components and Essential Oils from Plant Sources, 254. London: Springer London, 2012. http://dx.doi.org/10.1007/978-0-85729-323-7_813.

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Azimova, Shakhnoza S., and Anna I. Glushenkova. "Lesquerella stonensis Rollins." In Lipids, Lipophilic Components and Essential Oils from Plant Sources, 255. London: Springer London, 2012. http://dx.doi.org/10.1007/978-0-85729-323-7_816.

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Azimova, Shakhnoza S., and Anna I. Glushenkova. "Stanleyella texana (Cory) Rollins." In Lipids, Lipophilic Components and Essential Oils from Plant Sources, 276–77. London: Springer London, 2012. http://dx.doi.org/10.1007/978-0-85729-323-7_892.

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Conference papers on the topic "Rolling oil"

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Mahapatra, R., Rait Jaspal Singh, Samuel Pappy, Inder Singh, Ajay Kumar, Deepak Saxena, V. Martin, and R. K. Malhotra. "A Study on the Performance of Rolling Oil During Cold Rolling of Stainless Steel Simulating Industrial Condition." In ASME 2012 International Manufacturing Science and Engineering Conference collocated with the 40th North American Manufacturing Research Conference and in participation with the International Conference on Tribology Materials and Processing. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/msec2012-7373.

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The primary role of rolling oil in cold rolling is to reduce friction at the rubbing interface of the work roll and metal sheet surface. The rolling performance as well as cost effectiveness of rolled products is influenced by quality of the rolling oil. Lubricants are required to function under increasingly stressful operating conditions, so it is a challenge to evaluate the product under simulated conditions to improve the customer confidence in its performance. A steel rolling mill customer had requested us to develop a rolling oil to roll stainless steel in a new 3-stand 18-high rolling mill and demonstrate its performance on an experimental set up. The present paper describes the methodology adopted to assess the suitability of a rolling oil for the particular rolling mill. The screening was carried out with a SRV (Schwingungs Reibungs und Verschleisstest, meaning Vibration, friction and Abrasion) tribometer and EHD (Elasto-hydrodynamic) interferometry based film thickness apparatus to assess the frictional and film forming characteristics of the oil under simulated operating conditions. In addition, simulated tests were carried out on a laboratory 2-Hi Experimental rolling mill to find out the specific roll force (rolling force per unit width of the strip being rolled) required to obtain 55–60% cumulative reduction in three passes as desired by the customer for different grades of stainless steel. Based on results obtained in the laboratory mill simulating industrial test conditions, the product was recommended and was accepted by the customer for use in their rolling mill.
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Li, Liquan, Shaogang Liu, Jinli Wang, and Jipeng Liu. "The Research on Oil-air Lubrication and Oil Lubrication in the Rolling-sliding Friction Element." In information Services (ICICIS). IEEE, 2011. http://dx.doi.org/10.1109/icicis.2011.84.

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Le, Meilong, and Yumin Ye. "Using MIP with rolling horizon to plan China oil tanker fleets." In 2012 IEEE Symposium on Robotics and Applications (ISRA). IEEE, 2012. http://dx.doi.org/10.1109/isra.2012.6219302.

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Zulkipli, Siti Najmi Farhan, and Norhana Harun. "Keeping The Bucks Rolling: Monetizing Shallow Hanging Fruits Through Behind Casing Opportunities and Strategic Collaboration." In SPE Kuwait Oil & Gas Show and Conference. Society of Petroleum Engineers, 2019. http://dx.doi.org/10.2118/198049-ms.

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Sam, Srimanta, Neel Kant, and Sujoy S. Hazra. "Development of API 5L X70 Grade Steel Through Thin Slab Casting and Rolling Process." In ASME 2019 India Oil and Gas Pipeline Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/iogpc2019-4519.

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API 5L grade steel is mainly used for oil and gas transportation. The economy of gas transportation via pipeline demands for high operating pressures and large pipe diameters in order to improve transportation capacity which requires heavy thickness and/or high grade of the steel. This pushed the steelmakers to develop high strength steels (HSS) with superior metallurgical and mechanical (strength, toughness and ductility) properties in order to allow exploitation in hostile environments. The technology of production of API 5L grade through conventional thick slab process is matured enough as it gives flexibility of using higher %C, lower casting speed, high slab thickness (200–250 mm), higher reheating temperature and time, high reduction etc. However due to slower cooling rate during liquid to γ transformation, possibilities of centerline segregation defect increases. Thin slab technology (TSCR), on the other side allows a reduction in energy consumption (because of lower slab thickness and elimination of reheating process), with consequent benefits in terms of production costs and pollution reductions. But producing API X65 and above though TSCR route with subzero impact and DWTT is a challenge because of the difficulties in achieving a refined and homogeneous microstructure due to lower reduction ratio from slab to finish sheet thickness. This paper aims to give an overview of recent developments of high strength pipe steel grades as API 5L X70 through TSCR route. Information regarding the metallurgy and processing, such as chemical composition, microstructural design, thermo-mechanical controlled process (TMCP) and accelerated cooling process (AcC), to achieve the target strength, ductility and toughness properties are discussed. Mechanical properties are well above the requirement of X70 at HR stage as well as after pipe formation. Excellent Impact and DWTT is achieved up to −40° C.
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Shu, Xue-Dao, Tai-Zhu Chen, Ying Chang, Ying Zhu, and Wen-Wei Gong. "Forming Technology and Microstructure Distribution of Automobile Oil Pump Shaft by Extruded Cross Wedge Rolling." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10341.

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Abstract In order to improve the material utilization ratio of automobile oil pump shaft, the extrusion wedge cross rolling process was developed to form automobile oil pump shaft, the results show that the volume of the blank head produced by extrusion cross wedge rolling is reduced by about 75% compared with that produced by traditional cross wedge rolling, and the material utilization ratio can be increased to about 95%. The microstructure distribution of automobile oil pump shaft formed by this process was studied systematically by fem simulation and experiment, get the forming process can make the grain size of oil pump shaft rolling parts refine continuously, and finally obtain fine and uniform grain structure. The average grain size measured by the experiment is in good agreement with the simulation results. The research results lay a theoretical foundation for reducing oil pump cost and improving life.
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Kosasih, P. B., and A. K. Tieu. "Experimental and Numerical Study of Emulsion Lubricated Strip Rolling." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64020.

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An experimental and numerical study of cold rolling lubricated by O/W emulsion has been carried out. The experimental measurements are compared to the computed results from the numerical scheme developed by the authors. The scheme, which is based on two-phase lubricant model, is able to calculate oil concentration at any point within the inlet zone and work zone, rolling pressure, film thickness, and fractional contact ratio associated with strip rolling under mixed film lubrication at different rolling speed. The study encompassed extensive mixed film regime for speed, S ranges from 10−5 to 10−1, and supply oil concentration level λds ranges from 1% to 10%, and oil droplet size ranges from Ds from 5 to 20. The numerical results show the occurrence of moderate oil concentration increase in the inlet zone followed by a sharp one at the beginning of the work zone. The effect of the concentration process is predominantly seen in the film thickness and the lubricant pressure whilst its effect on the total pressure is less pronounced. The analysis of the results suggests that it is possible to lower the emulsion oil concentration without detrimental effects on the rolling process and indeed use this principle to control the outlet lubricant film thickness.
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Cole, K. C., A. Pilon, and D. Noel. "FT-IR Analysis Of Oil Emulsions Used In The Cold Rolling Of Steel." In Intl Conf on Fourier and Computerized Infrared Spectroscopy, edited by David G. Cameron. SPIE, 1989. http://dx.doi.org/10.1117/12.969386.

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Gyimah, Glenn Kwabena, Zhongning Guo, Ping Huang, Shuzhen Jiang, and Gary C. Barber. "PTFE and MoS2 Additives for Mineral Oil Film Formation in EHL Point Contacts." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65056.

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Lubricant film-forming viscosity index improvers blended with commercial engine oil have been developed and studied by using optical interferometry. The influence of the viscosity index improvers (PTFE and MoS2) mixed with oil were experimentally studied and compared with engine oil without the index improvers as the baseline. The effect of the viscosity index improvers on lubricant film thickness, contact pressure and rolling speed for the case of a steel ball loaded on a flat glass surface in point contact condition was investigated. An optical interferometry technique which utilized a monochromatic two-beam interferometry light source, a microscope and a high-speed video recording device was used for the investigation. Hamrock and Dawson calculations for EHL film thickness were also used for comparative analysis. The lubricants used were commercial SAE #30 engine oil and PTFE and MoS2 mixed with commercial SAE #30 engine oil. The oil viscosities ranged from 0.0109 Pa.s to 0.255 Pa.s. The rolling speed and the loads were varied between 0.189 m/s to 0.641 m/s and 1 N to 2.6 N respectively. The lubricant film thickness stability at the point of contact between the steel ball and the glass disc was investigated for both steady and rolling state conditions. The viscosity index improvers were found to have a significant effect on the film thickness behavior under pure rolling point contact conditions.
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Zhang, Kai, Qingfeng Meng, and Wei Zhao. "Measurement of Oil Film Thickness in Cylindrical Roller Bearing by Ultrasound." In ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/esda2014-20632.

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This paper describes the measurement of oil film thickness between rolling element and inner raceway in cylindrical roller bearing. A fine piezoelectric element is bonded on the inner surface of the inner ring to measure the reflection coefficient of oil between rolling element and inner raceway. The quasi-static spring model is used to calculate oil film thickness from the corrected reflection coefficient data. Experiments are described on a simplified cylindrical roller bearing configured by one cylindrical roller, 11ø, and an inner ring from a NU209EM bearing. Reasonable agreement is shown over several loads and speeds with predictions from elastohydrodynamic lubrication (EHL) theory.
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Reports on the topic "Rolling oil"

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Gamwo, Isaac K., Ward Burgess, and Deepak Tapriyal. High Temperature, High Pressure Equation of State: Solidification of Hydrocarbons and Measurement of Krytox Oil Using Rolling-Ball Viscometer Validation. Office of Scientific and Technical Information (OSTI), October 2014. http://dx.doi.org/10.2172/1350962.

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