scholarly journals The FDM Technique in Processes of Prototyping Spare Parts for Servicing and Repairing Agricultural Machines: A General Outline

2021 ◽  
Vol 26 (4) ◽  
pp. 145-155
Author(s):  
Krzysztof Łukaszewski ◽  
Tatiana Buchwald ◽  
Radosław Wichniarek
Keyword(s):  
Spare Parts ◽  
Engineering Industry ◽  
General Outline ◽  
Technical Parameters ◽  
Economic Issues ◽  
Machine Type ◽  
Number Of Factors ◽  
Processed Material ◽  
Alternative Techniques ◽  
Agricultural Machines

Abstract The aim of this research was to determine the possibility of applying alternative techniques for the production of prototypes for spare parts in agriculture and to determine the possible directions of development of their applications in the engineering industry. Then, to determine which spare parts could be produced using the FDM technique, comparisons of the most important parameters of spare parts produced independently (using the FDM technique) and obtained from producers (produced using traditional methods in professional factories) were made. A number of factors were analysed, from technical parameters such as machine type, processed material and its consumption including required as support structures, to economic issues such as manufacturing or purchase delivery total time and cost. The FDM technique has proven itself in many ways in the production of spare parts for agricultural machinery.

The Assessment of Reaction to Fire of Crushed Straw

2016 ◽  
Vol 824 ◽  
pp. 148-155 ◽  
Author(s):  
Jiří Teslík ◽  
Martina Vodičková ◽  
Kristýna Kutilová
Keyword(s):  
Building Materials ◽  
Civil Engineering ◽  
Engineering Industry ◽  
Sound Insulation ◽  
Technical Parameters ◽  
Fire Characteristics ◽  
Full Utilization ◽  
Preliminary Classification

To full utilization of crushed straw in civil engineering industry is necessary to know its technical parameters. During previous projects on VŠB – TUO, Faculty of Civil Engineering have found parameters like settlement, thermal conductivity or airborne sound insulation. The research on these parameters have had favorable results, therefore the research is going on and other characteristics of crushed straw are finding out. These days the research team deals with determination of important fire characteristics of crushed straw. Fire characteristics play substantial character by building materials and their design in buildings. Nature materials are generally regarded as flammable. If some material is pressed, the same rule as in the phonebook – if you ignite one sheet of paper, it burns. But if you try to ignite the whole phonebook, it will be not so easy. This article is reported the first step of research on the reaction to fire. This is the preliminary classification of crushed straw into reaction to fire. The test was made according to methods which are described below. There are some changes in methods due to different structures of crushed straw.

Blank Form and Reduction as Determinants of Mousterian Scraper Morphology

1992 ◽  
Vol 57 (1) ◽  
pp. 115-128 ◽  
Author(s):  
Steven L. Kuhn
Keyword(s):  
Research Issues ◽  
Number Of Factors ◽  
Differential Reduction ◽  
Two Factors ◽  
The Subject ◽  
Alternative Techniques ◽  
Typological Variation

Variation in the forms of Mousterian tools has been attributed to a number of factors, including style, function, and more recently, differential reduction. This study compares the influences of two factors, reduction and the shapes of tool blanks, on the forms of scrapers from a Mousterian site in Italy. In the subject assemblages, the shapes of the tool blanks had a much stronger influence on scraper forms than had reduction. To the extent that blank form affects typology in other cases, explanations of contrasts among Mousterian assemblages would need to account for the use of alternative techniques of flake production. Since typological variation is multicausal, it would also appear more profitable to focus directly on variables pertinent to current research issues, rather than on reinterpreting the typology.

scholarly journals ОРГАНИЗАЦИЯ РЕМОНТНОГО ПРОИЗВОДСТВА ИЗНОСА ДЕТАЛЕЙИ ВИДЫ ВОССТАНОВЛЕНИЯ

2019 ◽  
Author(s):  
D.G. Churilov ◽  
S.D. Polischuk ◽  
Y.A. Stekolnikov ◽  
I.S. Arapov ◽  
A.V. Shemyakin
Keyword(s):  
Regulatory System ◽  
Physical And Mechanical Properties ◽  
Technical Condition ◽  
Spare Parts ◽  
Production Cycle ◽  
Recovery Processes ◽  
Restoration Work ◽  
Working Bodies ◽  
The Cost ◽  
Agricultural Machines

Организацияремонтного производства на основе оптимального использования передовых технологических процессов позволит восстанавливать и упрочнять рабочие органы сельскохозяйственных машин с учетом минимума затрат как на процессы восстановления, так и на функционирование предприятия в целом.При ремонте существуют несколько вариантов: заменить изношенныедетали на новые или произвести восстановление изношенных с доведением и улучшением их физико-механических свойств.Восстановление более предпочтительно. Оно позволяет сокращать время простоя неисправных машин и оборудования, повышать показатели надежности использования машин.Экономика работ по восстановлению заключается в снижении себестоимостиремонтакак агрегатов,так и машин. При этом необходимо восстановить геометрические показатели деталей.Анализ статистики показал,что годных для восстановления деталей до 50 и только до 9 не подлежат восстановлению.По сравнению с изготовлением новых запасных частей количество операций обработки сокращается в 3-8 раз.Важное преимущество восстановления малая металлоемкость. В процессах восстановления требуется на 50-75 меньше металла,чемдля изготовленияновых.Восстановление деталей к импортным машинам можно рассматривать как альтернативу дорогим оригинальным запчастям.При этом должна быть налажена регламентная систематехобслуживания и ремонтасельскохозяйственных машин по фактическому техническомусостоянию. Качестворемонта зависит оторганизации всех звеньев производственногоцикла, воснове которого лежиткомплексмероприятий техническогохарактера.The organization of repair production based on the optimal use of advanced technological processes will make it possible to restore and strengthen the working bodies of agricultural machines, taking into account the minimum costs of both the restoration processes and the functioning of the enterprise as a whole. During repair, there are several options: to replace worn parts with new ones or to restore worn parts with improvement in their physical and mechanical properties. Recovery is more preferable. It makes possible to reduce the downtime of faulty machines and equipment and to increase their reliability. The economics of restoration work is to reduce the cost of repairs of both units and machines. For this, it is necessary to restore the geometric parameters of the parts. The results of statistics showed that up to 50 of parts were suitable for recovery and only up to 9 cannot be restored.Compared with the manufacture of new spare parts, the number of machining operations is reduced by 3-8 times. An important advantage of recovery is low metal consumption. In the recovery processes, 50-75 less metal is required than for manufacturing the new ones. The restoration of parts for imported machines can be considered as an alternative to expensive original spare parts. At the same time, a regulatory system for maintenance and repair of agricultural machines according to the actual technical condition should be established. The quality of repairs depends on the organization of all parts of the production cycle, which is based on a set of technical measures.

scholarly journals CHALLENGES FOR THE DEVELOPMENT OF AGRICULTURAL POWER MACHINES AND THEIR OPERATING COSTS IN HUNGARY

2018 ◽  
Vol XX (5) ◽  
pp. 81-86
Author(s):  
Szilvia Erdeiné Késmárki-Gally ◽  
Renáta Rák
Keyword(s):  
Agricultural Production ◽  
Significant Proportion ◽  
Spare Parts ◽  
Operating Costs ◽  
High Quality ◽  
Equipment Investment ◽  
Inappropriate Use ◽  
The Past ◽  
Agricultural Machines

One of the most important factors of competitive production is mechanization, which enables tasks to be done on time and in a high-quality manner. Nowadays, in Hungary, many distributors deal with the trading of agricultural machines and spare parts. The operating costs of these machines constitute a significant proportion of the expenses involved in agricultural production, and thus the appropriate and inappropriate use of machinery can significantly influence the efficiency of farming. The goal of this study is to present the market of agricultural power machines, examine the operating costs and analyse the causes of changes in the Hungarian machinery market during the past few years. In our research, it can be seen that EU co-financed support for machinery and equipment investment have a great impact on the replacement of power machines and average annual usage, since after EU subsidies are no longer incoming, the number of agricultural machines sold has decreased.

Using of Information Systems for Socio-Economic Management Applications in Mechanical Engineering Enterprises

2015 ◽  
Vol 770 ◽  
pp. 651-655 ◽  
Author(s):  
Oksana Bleikher ◽  
Svetlana Kvesko
Keyword(s):  
Information System ◽  
Information Systems ◽  
User Interface ◽  
Mechanical Engineering ◽  
Information Gathering ◽  
Engineering Industry ◽  
Economic Management ◽  
Economic Issues ◽  
Engineering Enterprise ◽  
Database Engine

The paper summarizes an experience of information system implementation in mechanical engineering industry of Russia Federation. Methodological spaces of information supply in mechanical engineering enterprise have been approved. Effectiveness of creation and usage of non-unified information systems for information gathering about local socio-economic issues has been estimated. Conjointly with the friendly user interface individually tuned for each stakeholder, and realized on the base widely used webserver Apache 2.2, using programming language PHP, as well as using database engine mysql 5.5 with report import into unified format like SPSS or Excel, the system confirms its own usefulness.

scholarly journals A Three-Step Neural Network Artificial Intelligence Modeling Approach for Time, Productivity and Costs Prediction

2019 ◽  
Vol 41 (1) ◽  
pp. 35-47 ◽  
Author(s):  
Andrea Rosario Proto ◽  
Mauro Maesano ◽  
Giuseppe Zimbalatti ◽  
Giuseppe Scarascia Mugnozza ◽  
Giorgio Macrì ◽  
...  
Keyword(s):  
Neural Network ◽  
Sustainable Forest Management ◽  
Multiple Linear Regression Model ◽  
Small Scale ◽  
Forest Site ◽  
Work Time ◽  
Technical Parameters ◽  
Wood Harvesting ◽  
Number Of Factors ◽  
Artificial Neural Network Ann

The improvement of harvesting methodologies plays an important role in the optimization of wood production in a context of sustainable forest management. Different harvesting methods can be applied according to forest site-specific condition and the appropriate mechanization level depends on a number of factors. Therefore, efficiency and functionality of wood harvesting operations depend on several factors. The aim of this study is to analyze how the different harvesting processes affect operational costs and labor productivity in typical small-scale Italian harvesting companies. A multiple linear regression model (MLR) and artificial neural network (ANN) have been carried out to predict gross time, productivity and costs estimation in a series of qualitative and quantitative variables. The results have created a correct statistical model able to accurately estimate the technical parameters (work time and productivity) and economic parameters (costs per unit of product and per hectare) useful to the forestry entrepreneur to predict the results of the work in advance, considering only the values detectable of some characteristic elements of the worksite.

scholarly journals Analysis of optimal costs for reserves of spare parts for agricultural machines

2018 ◽  
Vol 65 (1) ◽  
pp. 81-92
Author(s):  
Marjan Mirčevski ◽  
Milan Mihajlović ◽  
Milan Milunović ◽  
Ivan Milojević ◽  
Radovan Damnjanović ◽  
...  
Keyword(s):  
Spare Parts ◽  
Agricultural Machines

scholarly journals Research of problems of technical operation of agricultural machines

2021 ◽  
Vol 937 (3) ◽  
pp. 032053
Author(s):  
G Kokieva ◽  
A Spiridonova ◽  
A Anosova ◽  
V Belomestnykh ◽  
A Pekhutov
Keyword(s):  
Practical Interest ◽  
Spare Parts ◽  
Economic Feasibility ◽  
Labor Costs ◽  
Automatic Control Systems ◽  
Technical Potential ◽  
Rural Producers ◽  
Technical Operation ◽  
The Cost ◽  
Agricultural Machines

Abstract Tracking devices are increasingly used in automatic control systems for mobile agricultural machines. Many elements are regulated by standards and specifications, and it is of scientific and practical interest to establish a correspondence between the reliability of restored parts and connections with the reliability of machines. This is due to many reasons, one of which is a decrease in the technical potential of the village: the composition of the machine and tractor fleet is decreasing, the physical and moral wear of equipment is progressing. Repair and maintenance of cars due to the price arbitrariness of intermediary structures, mainly on the part of collective farms and farms. For this reason, the reliability and reliability of the machine park of rural producers remain low, negatively affects the agrotechnical timing of mechanized work, their cost. In accordance with the standard technology, standards of labor costs for the repair of machines, standards for the consumption of materials needed for repair, and standards for the consumption of spare parts were created. The economic feasibility of restoring parts is usually assessed by comparing the cost of a new part and the cost of repairing a worn one.

A CFD Investigation Into the Effects of Current Incidence on the Hydrodynamic Loading on a Deepwater TLP

1999 ◽  
Vol 121 (2) ◽  
pp. 109-115 ◽  
Author(s):  
P. Teigen ◽  
V. P. Przulj ◽  
B. A. Younis
Keyword(s):  
Stokes Equations ◽  
Offshore Structures ◽  
Engineering Industry ◽  
Navier Stokes ◽  
Navier Stokes Equations ◽  
Averaged Equations ◽  
Computational Mesh ◽  
Number Of Factors ◽  
High Reynolds ◽  
Current Incidence

The use in the offshore engineering industry of computational fluid dynamics (CFD) to estimate the hydrodynamic forces due to steady, turbulent currents on offshore structures has so far been rather limited. This is largely due to the uncertainties inherent in obtaining accurate solutions to the governing Navier-Stokes equations, particularly for complex geometries and at high Reynolds numbers. In this study, we assess the contributions to such uncertainties arising from a number of factors. Those include the number of nodes in the computational mesh used to overlay the flow domain, the choice of scheme used to discretize the governing equations, the choice of turbulence model used to close the time-averaged equations, and the assumptions made regarding the state of turbulence in the incident current. The influence of these factors is systematically assessed with respect to the flow around a full-scale mini-TLP. The paper also assesses the influence of the current incidence on the hydrodynamic loads on the same TLP. A previous study by the same authors has suggested the presence of substantial “shielding,” whereby the computed steady-state loading on the TLP was found to be significantly lower than the value recommended by the DNV design code. Computations performed here with the direction of the incident current varied in the range 0–45 deg suggest that the extent of this shielding is significantly diminished at high angles of incidence.

Prospects for creation of harvesting complexes on basis of domestic construction and agricultural machines

2020 ◽  
pp. 3-10
Author(s):  
I. V. Grigoryev ◽  
◽  
O. A. Kunitskaya ◽  
Keyword(s):  
Exchange Rate ◽  
Import Substitution ◽  
Engineering Industry ◽  
Modular Construction ◽  
Warm Winter ◽  
Financial Difficulties ◽  
Forest Engineering ◽  
Agricultural Machines

The fall in the ruble exchange rate and the fall in demand for wood led to significant financial difficulties for logging companies. The situation was also affected by the abnormally warm winter of 2019—2020, as a result of which considerable amounts of harvested wood simply could not be exported. These situations aggravated the problems associated with the death of domestic forest engineering, and even more acutely raised the question of the need to create logging complexes based on domestic machines. In recent years, after the introduction of sanctions against Russia, our country localized the production of road and agricultural machines. Unfortunately, this has not been done for the forest engineering industry, which, in fact, has ceased to exist in Russia. For a relatively quick partial import substitution in forest engineering, it is advisable to use well-developed road and agricultural machines as basic machines, applying the principle of modular construction of complexes to them.

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