scholarly journals Increase of productivity and composite abrasion quality based on choice and abrasive tool rational use

2020 ◽  
Vol 2020 (9) ◽  
pp. 40-48
Author(s):  
Vladimir Makarov ◽  
Artem Volkovsky ◽  
Inur Sabirzyanov
Keyword(s):  
Orthogonal Cutting ◽  
Polymeric Composite ◽  
Abrasive Tool ◽  
Surface Layers ◽  
Rational Use ◽  
Abrasive Tools

On the basis of the preliminary investigations on the orthogonal cutting dynamics there is offered and confirmed experimentally a hypothesis on possibility of composite efficient machining with an abrasive tool during drilling, milling and grinding. There are defined rational designs of abrasive tools and optimum machining modes ensuring the growth of productivity and quality of surface layers in polymeric composite parts.

Effect of Abrasive Tools in Galvanomechanical Treatment on the Roughness of the Deposited Chromium Layer

2018 ◽  
Vol 284 ◽  
pp. 1178-1183 ◽  
Author(s):  
D.A. Zherebtcov ◽  
Oksana N. Gruba ◽  
K.R. Smolyakova
Keyword(s):  
Experimental Studies ◽  
The Body ◽  
Abrasive Tool ◽  
Chromium Layer ◽  
Pressing Force ◽  
Hard Chromium ◽  
Chromium Plating ◽  
Cylindrical Parts ◽  
Abrasive Tools

The article deals with the method of obtaining a hard chromium coating on details of the "body of rotation" type with the use of an abrasive tool. The influence of the composition and hardness of the elastic abrasive tool on the results of galvanomechanical chromium plating of rotating cylindrical parts has been studied. Binder compositions for an abrasive tool used to improve the roughness of the deposited chromium layer have been developed. A series of experimental studies has been carried out with chromium plating of steel cylindrical parts with simultaneous abrasive processing. Beforehand, an abrasive tool with previously developed binder formulations was manufactured. The obtained results of the influence of the characteristics of the abrasive tool and its pressing force on the chromium-plated part on the quality of the precipitated chromium made it possible to determine the optimum modes for obtaining a coating of the required thickness. Also, a suitable abrasive tool has been chosen to obtain a coating of proper quality.

Modification of tundish design to improve quality of slabs, casted at CCM No. 4 of EVRAZ NTMK

2020 ◽  
Vol 76 (6) ◽  
pp. 559-563
Author(s):  
I. M. Zakharov ◽  
V. A. Smirnov ◽  
D. V. Sushnikov ◽  
A. G. Lyzhin ◽  
E. A. Lavrova ◽  
...  
Keyword(s):  
Basic Number ◽  
Metal Level ◽  
Surface Layers ◽  
Secondary Oxidation ◽  
Strip Rolling ◽  
Actual Distribution ◽  
Ultrasonic Control ◽  
Analysis Of Results ◽  
Water Simulation

A technology of continuous casting of steel has a large effect on its contamination. In particular, proper organization of metal flows in tundish and mold is very important. After completion a series of casting through a tundish and drop of metal level in it, it possible, that the slag flows from the surface layers of the tundish to capture the metal. An analysis of results of ultrasonic control of finished strip showed, that the basic number of the revealed defects was obtained during strip rolling out of the last slabs of the last heat in a series for a tundish. Metallographic studies determined, that the defects were located in the slab axis zone and filled by macro-inclusions of complex composition. To determine the actual distribution of metal flows, a water simulation of them was accomplished for the existing design of the EVRAZ NTMK tundish. It was determined, that at the drop of metal level in a tundish, a capture of slag from the metal reservoir and its transfer into the main bath of the tundish takes place due to whirligig flows. Following the weight metal consumption, the zone of slag inclusions distribution enlarges. Besides, denudation of the metal mirror in the metal reservoir takes place, resulted in metal secondary oxidation. Based on the results of the simulation, it was proposed to modify the design of the “turbostop”, which is installed in the metal reservoir of the tundish. Besides, it was proposed to remove the dividers installation in the tundish. It was noted, that the proposed steps enable to ensure a minimal level of rejections.

Cultivation of Rapeseed in the Southern Urals and Its Rational Use

2020 ◽  
Vol 67 (1) ◽  
pp. 78-86
Author(s):  
Nikolay S. Sergeev ◽  
Mikhail V. Zapevalov ◽  
Alexander V. Gritsenko
Keyword(s):  
Southern Urals ◽  
Research Purpose ◽  
Partial Replacement ◽  
Biodiesel Fuel ◽  
Forest Steppe ◽  
The Southern Urals ◽  
Rational Use ◽  
Chelyabinsk Region ◽  
Spring Rape

In the continental climate of the southern Urals, rapeseed compares favorably with many forage and traditional silage crops with a high protein content and adaptive properties. The cultivation of rapeseed guarantees the production of its own seeds, up to 40 percent of oil, 60 percent of cake and 98 percent of rapeseed flour. (The research purpose) The research purpose is in improving the efficiency of rapeseed cultivation and rational use of rapeseed seeds, rapeseed flour and oil in the agricultural production in the Chelyabinsk region. (Materials and methods) The influence of various forecrops on the productivity and quality of spring rape seeds in the links of grain-pair crop rotations in the Northern forest-steppe of the Chelyabinsk region were studied. Authors have analyzed the chemical composition of the soil and seeds of spring rape after various forecrops. (Results and discussion) The article proposes to reduce energy costs during pressing and reduce residual oil in the cake after pre-grinding of rapeseed by cutting method using a centrifugal-rotary shredder. The article shows that rapeseed flour has a good flowability and is easily mixed with other feeds. It was found that partial replacement of concentrates with rapeseed flour in the amount of 8-12 percent of the total weight in the diet of lactating cows contributes to an increase in milk productivity by 1.1-1.8 kilograms in terms of milk of 4 percent fat content. (Conclusions) It has been revealed that in order to increase the yield and quality of spring rape seeds, it is necessary to place them on the best forecrops. It was found that when 75 percent of rapeseed oil is mixed with 25 percent of diesel fuel, the obtained biodiesel is not inferior to diesel in terms of energy indicators. The article proves that when cultivating rapeseed for seeds on an area of 100 hectares, it is possible to produce 94.5 tons of biodiesel fuel, 106.0 tons of cake with an oil content of 5 percent and 8.4 tons of oil sludge, the estimated economic effect after sale is of 3,813,325 rubles.

Pharmacoeconomical approaches for assessing the rational use of ophthalmic drugs in polyclinic settings

2021 ◽  
pp. 143-145
Author(s):  
N.A. Nefedov ◽  
◽  
D.S. Ramonas ◽  
B.G. Khasanov ◽  
A.S. Alexandrov ◽  
...  
Keyword(s):  
Fold Increase ◽  
Eye Drops ◽  
Ophthalmic Drugs ◽  
Rational Use ◽  
Rational Drug ◽  
Acquisition Costs ◽  
The Cost ◽  
Drug Provision ◽  
Combined Drugs

Purpose. To evaluate the results of the rational use of ophthalmic medicines with the use of pharmacoeconomical analysis. Material and methods. With the help of ABC-VEN analysis, a comparative study of the quality of pharmacotherapy and drug provision of patients who were monitored and treated by an ophthalmologist of the polyclinic in 2015 and 2019 was conducted. Results. As a result, it was found that the share of costs for vital drugs increased by 10.1% and amounted to 71.1% in 2019, which corresponds to the standardized criterion (70-80%). There was a reduction in the cost of purchasing secondary drugs by 7.6%, which indicates a rational drug supply of ophthalmic drugs. The most commonly used drugs for the treatment of glaucoma were 27.8% in 2015 and 35.1% in 2019. The share of their acquisition costs was 54.9% and 67.9%, respectively. There was a significant increase in the range and number of drugs for the treatment of patients with glaucoma: a 2.8-fold increase in the number of purchased eye drops for monotherapy and a 12% increase in the number of combined drugs. Conclusion. Pharmacoeconomical analysis showed an optimization of spending money on the purchase of drugs used in ophthalmology: an increase of 10.1% in the share of vital drugs and a decrease of 7.6% in the cost of purchasing secondary drugs. There was an increase in the range and quantity of drugs for the treatment of patients with glaucoma. Key words: ABC-VEN-analysis, drugs, ophthalmology, pharmacoeconomics.

Using Image Analysis Techniques for Single Evaluation of the Chip Shrinkage Factor in Orthogonal Cutting Process

2012 ◽  
Vol 504-506 ◽  
pp. 1329-1334 ◽  
Author(s):  
Moises Batista ◽  
Madalina Calamaz ◽  
Franck Girot ◽  
Jorge Salguero ◽  
Mariano Marcos
Keyword(s):  
High Speed ◽  
Orthogonal Cutting ◽  
Rake Angle ◽  
Cutting Process ◽  
Shrinkage Factor ◽  
A Value ◽  
Chip Shrinkage ◽  
Chip Geometry ◽  
Image Analysis Techniques

The forces involved in a cutting process are related, for example, with the power consumption, with the final quality of the workpiece and with the chip geometry obtained, since these forces determine the compression experimented by the chip and therefore its final geometry. The orthogonal cutting process assisted with a High Speed Filmation (HSF) permit obtains a digital filmation of the process with high magnification. This filmation permits to obtain a measurement of the longitudinal changes produced in the chip. This deforms are related with the Shrinkage Factor, ζ. And in this case the Stabler hypothesis is enabled, by that using the shear angle and the rake angle is possible obtain a value of the Shrinkage Factor in a different conditions.

scholarly journals Sistema de Iluminação Publica Inteligente

2020 ◽  
Author(s):  
Fábio Rodrigues de la Rocha
Keyword(s):  
Quality Of Life ◽  
Smart Cities ◽  
Low Cost ◽  
Research Work ◽  
Sustainable Growth ◽  
Street Lighting ◽  
Rational Use

Public street lighting management is a well known problemwhich can be revisited from the perspective of Smart Cities.In Smart Cities there is an interconnection of services andinfrastructure to provide sustainable growth and improvementsin citizens’ quality of life. In this research work, weexplore new low cost technologies to create a smart streetlight system capable of monitoring and controlling the lamps,thus reducing the costs with maintenance and allowing amore rational use of electricity.

scholarly journals Cutting mode impact upon output process parameters at processing of polycrystalline composite materials

2017 ◽  
Vol 2 (6) ◽  
pp. 34-38
Author(s):  
Ю. Зубарев ◽  
Yu. Zubarev ◽  
А. Приемышев ◽  
A. Priyomyshev ◽  
А. Заостровский ◽  
...  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Process Parameters ◽  
Polymeric Composite ◽  
Polymeric Composite Material ◽  
Output Process ◽  
Product Surface ◽  
Required Quality ◽  
Material Cutting

The peculiarities in polymeric composite material cutting are considered. The recommendations for use of different materials for cutters, their geometry and treatment modes are offered that allows obtaining the required quality of a product surface.

scholarly journals Concept of contemporary methods for monitoring and determination of cyanide in water

2004 ◽  
Vol 58 (7-8) ◽  
pp. 338-342
Author(s):  
Dragana Cickaric ◽  
Ljubinka Rajakovic
Keyword(s):  
Quality Of Life ◽  
Water Quality ◽  
Toxic Substance ◽  
Water Protection ◽  
Rational Use ◽  
Modern Methods ◽  
Recent Developments ◽  
Water And Wastewater

The quality of life depends on water quality. Good water quality and the rational use of water are an absolute need of the new millennium. Although it is an ecological and health priority to prohibit the contamination of water and water protection, it is a responsibility for environmental engineers and chemists to develop and apply effective methods for monitoring and controlling of water quality, and at that way prevent ecological and technological catastrophe on time. In this paper modern methods and process for monitoring, control and detection of cyanide in water and wastewater are presented. Recent developments in instrumental techniques and treatment for determination of this toxic substance in water are described, particularly the methods according to green analytical aspects.

Amortization and Recrystallization of 6H-SiC by ion Beam Irradiation

1994 ◽  
Vol 339 ◽  
Author(s):  
V. Heera ◽  
R. Kögler ◽  
W. Skorupa ◽  
J. Stoemenos
Keyword(s):  
Ion Irradiation ◽  
Ion Beam ◽  
Surface Region ◽  
Ion Beam Irradiation ◽  
Surface Layers ◽  
Near Surface ◽  
Transmission Electron ◽  
Amorphous Surface ◽  
Amorphous Sic

ABSTRACTThe evolution of the damage in the near surface region of single crystalline 6H-SiC generated by 200 keV Ge+ ion implantation at room temperature (RT) was investigated by Rutherford backscattering spectroscopy/chanelling (RBS/C). The threshold dose for amorphization was found to be about 3 · 1014 cm-2, Amorphous surface layers produced with Ge+ ion doses above the threshold were partly annealed by 300 keV Si+ ion beam induced epitaxial crystallization (IBIEC) at a relatively low temperature of 480°C For comparison, temperatures of at least 1450°C are necessary to recrystallize amorphous SiC layers without assisting ion irradiation. The structure and quality of both the amorphous and recrystallized layers were characterized by cross-section transmission electron microscopy (XTEM). Density changes of SiC due to amorphization were measured by step height measurements.

scholarly journals Internal Cylindrical Grinding Process of INCONEL® Alloy 600 Using Grinding Wheels with Sol–Gel Alumina and a Synthetic Organosilicon Polymer-Based Impregnate

Micromachines ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 115 ◽  
Author(s):  
Wojciech Kapłonek ◽  
Krzysztof Nadolny ◽  
Krzysztof Rokosz ◽  
Jocelyne Marciano ◽  
Mozammel Mia ◽  
...  
Keyword(s):  
Sol Gel ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Alloy 600 ◽  
Abrasive Tool ◽  
Grinding Wheels ◽  
Impregnation Process ◽  
Organosilicon Polymer ◽  
Internal Cylindrical Grinding ◽  
Abrasive Tools

The development of modern jet engines would not be possible without dynamically developed nickel–chromium-based superalloys, such as INCONEL® The effective abrasive machining of above materials brings with it many problems and challenges, such as intensive clogging of the grinding wheel active surface (GWAS). This extremely unfavorable effect causes a reduction in the cutting ability of the abrasive tool as well as increase to grinding forces and friction in the whole process. The authors of this work demonstrate that introduction of a synthetic organosilicon polymer-based impregnating substance to the GWAS can significantly improve the effects of carrying out the abrasive process of hard-to-cut materials. Experimental studies were carried out on a set of a silicon-treated small-sized sol–gel alumina 1-35×10×10-SG/F46G10VTO grinding wheels. The set contained abrasive tools after the internal cylindrical grinding process of INCONEL® alloy 600 rings and reference abrasive tools. The condition of the GWAS after the impregnation process was studied, including imaging and measurements of its microgeometry using confocal laser scanning microscopy (CLSM), microanalysis of its elemental distribution using energy dispersive X-ray fluorescence (EDXRF), and the influence of impregnation process on the grinding temperature using infrared thermography (IRT). The obtained results confirmed the correctness of introduction of the impregnating substance into the grinding wheel structure, and it was possible to obtain an abrasive tool with a recommended characteristic. The main favorable features of treated grinding wheel concerning the reduction of adhesion between the GWAS and grinding process products (limitation of the clogging phenomenon) as well as reduction of friction in the grinding process, which has a positive effect on the thermal conditions in the grinding zone.

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