Wyniki wyszukiwania - BazTech

1

Naprężenia, odkształcenia, przemieszczenia to nie tylko abstrakcyjne tensory

Bałos Paweł

Budownictwo, Technologie, Architektura

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2021

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nr 1

66--69

2

Risk in the scope of research and innovative technological projects

Richert Maria, Hubicki Rafał, Łebkowski Piotr, Kulczycka Joanna, Mrotzek-Bloess Asja

Acta Innovations

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2020

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no. 34

58--67

EN

Assessment and management of risk constitute the subject of many researches. Nevertheless, many more specific factors are applicable during the implementation of innovative technological projects. On the article identified risk factors, which have been supplemented, systematized and assigned to the individual risk categories. The risk assessment methods for R&D projects have been analysed, as well as the risk sheets have been developed for the R&D project through the use of dotProject application. Also shown that networking and clustering is a change for fruitful cooperation within difference EU projects, which create trust between business and sciences and reduce the risk.

3

Instalacja demonstracyjna podziemnego zgazowania węgla

Świądrowski J., Mocek P., Jędrysik E., Stańczyk K., Krzemień J., Krawczyk P., Chećko J.

Chemik

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2015

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Vol. 69, nr 12

815--826

PL

W publikacji przedstawiono propozycję układu technologicznego wraz z wynikami obliczeń opłacalności przedsięwzięcia polegającego na budowie instalacji demonstracyjnej podziemnego zgazowania węgla. Podziemne zgazowanie węgla zaliczane jest do czystych technologii węglowych, a jedna z metod eksploatacji węgla tym sposobem – metoda szybowa - może znajdować zastosowanie dla pokładów resztkowych w likwidowanych kopalniach, zwiększając w ten sposób stopień wykorzystania zasobów węgla. Budowa instalacji demonstracyjnej wytwarzającej gaz dla zastosowania w energetyce w układach o średniej mocy powinna stanowić element pośredni pomiędzy instalacją pilotową, w której badania przeprowadzono w 2014 r., a instalacją komercyjną.

EN

The paper presents proposition of process system with cost-effectiveness calculation costs for the undertaking involving construction of demonstration facility for underground coal gasification. Underground coal gasification is classified as clean coal technology, while one of the methods for mining coal bed using this technique – shaft method – can be applied for residual coal seam in liquidated mines this way increasing degree of coal utilization. The construction of demonstration facility producing gas for application in power industry in average power systems shall serve as an intermediate element between pilot facility, which was studied in 2014 and commercial facility.

4

Mapa ryzyka jako narzędzie oceny ryzyka inwestycji technologicznej

Oroń G.

Technologia i Automatyzacja Montażu

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2012

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nr 1

41-45

EN

This article presents a quick and effective method of assessing an investment risk in technology. Usually, when a commercial offer for a project on the development of new technologies is drawn up, a risk that entails such investment is not considered. A risk map can easily show and interpret a probable risk that may occur during the execution of a technological project.

5

The influence of production method on oxidation resistance of the aluminide coatings obtained on IN 100 alloy

Pytel M., Góral M., Maliniak M.

Archives of Materials Science and Engineering

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2012

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Vol. 53, nr 2

102-108

EN

Purpose: The comparison of three deposition of coatings method. Design/methodology/approach: The diffusion aluminide coatings were deposited using the pack cementation, out of pack and CVD method. Findings: The authors present in the article the results on influence of the method of manufacturing the aluminide coatings on their microstructure and oxidation resistance. Research limitations/implications: The thickness analysis and the chemical composition analysis with a use of light microscopy, scanning electron microscopy and EDS analysis were performed. Practical implications: This process can be used in aerospace industry to form oxidation resistant coatings. Originality/value: It has been proven, that the coating obtained with CVD method, despite its small thickness, was characterized by the best cyclic oxidation resistance.

6

Microstructure and kinetic growth of aluminide coatings deposited by the CVD method on Re 80 superalloy

Nowotnik A., Sieniawski J., Góral M., Pytel M., Dychton K.

Archives of Materials Science and Engineering

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2012

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Vol. 55, nr 1

22-28

EN

Purpose: The preliminary results of research on forming the aluminide coatings using CVD method were presented in the article. Design/methodology/approach: The coatings were obtained in low activity process on the surface of Rene 80 superalloy. The microstructure analysis and chemical composition analysis were performed applying different values of aluminizing process parameters. Findings: The authors present in the article the results of oxidation resistance analysis of aluminide coatings which were obtained on the surface of Rene 80 superalloy using various techniques. Research limitations/implications: The research results revealed the possibility of obtaining coatings by low activity aluminizing. Practical implications: This process can be used in aerospace industry to form oxidation resistant coatings. Originality/value: It was shown that the coating created during the CVD process was characterized by a good oxidation resistance at the temperature of 1100°C.

7

Technological operators of series of types technology creating

Rząsiński R., Gendarz P.

Journal of Achievements in Materials and Manufacturing Engineering

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2010

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Vol. 41, nr 1-2

155-163

EN

Purpose: The result of this paper is verification of relation between constructional features and technological features. The basic tool of the series of types of technologies creating is algorithmic method. The worked out datum of these methods is already elaborated ordered families of construction in form of series of types or modular series of elements construction. Design/methodology/approach: This paper shows algorithmic understanding of getting input data in the process of technology creating based on data of construction. Basic tool of realization of data selection for the process of manufacture is algorithmic method and use of advanced graphic programme. Findings: The basic result of the analyzed problem is the realization of relations between construction and technology for specified series of types of elements of machine engines. Moreover the algorithmic method with its essential constituents which determine input date of algorithmization of processes of selection of technological features on bases of constructional features was introduced. Research limitations/implications: Analyzed methods develop algorithmization of designing environment and support integration with the prepare production process (relational databases, theory of automatic classification). Practical implications: Described methods were developed on practical examples of creating the technological module systems of hydraulic cylinders used in mining, slag cars used in metallurgy and gears series of types The represented methods are applied for the series of type of units of servo-motors hydraulic practical in mining. Originality/value: Algorithmic method and CAM method are basis for selection of technological features in the process of already ordered technology families creating. This method is characterized with possibility of shortening time connected with preparation of manufacture.

8

Cost calculation of constructions series of types

Gendarz P., Cielniak M.

Journal of Achievements in Materials and Manufacturing Engineering

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2010

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Vol. 40, nr 1

58-65

EN

Purpose: The main aim of research was to elaborate methods to estimate costs in construction series of types production process. Design/methodology/approach: Based on manufacturing cost of one element it is possible to determine cost of other elements belonged to the same construction series of types. The four main cost estimating methods were distinguished. The first method is feature-based. The technological operations are dedicated to specified pieces of element. Cost manufacturing of every piece is specified. Based on elementary costs the manufacturing cost of whole part is calculated. The second method uses construction similarity theory. The selected part manufacturing costs are functionally depended on main part manufacturing costs. The CAM method is based on time calculation from manufacturing process simulation. The simplified method uses normalized masses of analyzed parts pieces. The balance coefficients of those pieces are specified. Findings: Manufacturing cost estimation methods were analyzed. Those methods are based on construction and manufacturing technology. The main conclusion is that CAM method is most accurate. Research limitations/implications: The CAM method is limited to analyze only manufacturing process based on numerically controlled machines. The Feature-based method require developed database for analyzed part family. Practical implications: Presented method was applied in hydraulic props manufacturing cost analysis. Originality/value: Described analysis puts together and compares different cost estimating methods which allows choosing most suitable method for analyzed manufacturing process.

9

Methods to create series of technology

Rząsiński R., Gendarz P.

Journal of Achievements in Materials and Manufacturing Engineering

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2009

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Vol. 36, nr 2

150-159

EN

Purpose: The main reason to commence research concerning new methods of transformation technology into structure was introduced in the process of creating ordered technologies on the basis of series of structure. The worked out datum for these methods is as elaborated ordered families of structure in the form of series of types or modular series of elements structure. Design/methodology/approach: This paper shows algorithmic understanding to get input data in the process of technology creation based on data of structure. Basic tool to realize data selection for the process of manufacture is the theory of technological similarity, algorithmic method and use of advanced graphic programme. Findings: The basic result of the analyzed problem is to realize relations between structure and technology for specified series of machine engines elements types. Moreover, the theory of technological similarity with its essential constituents which determine input date for selection processes algorythmisation of technological features on the basis of constructional features was introduced. Research limitations/implications: Analyzed methods develop algorythmisation of designing environment and support integration with the process preparing production. Further analyses will be carried out on in order to specify the theory of technological similarity in new forms of computer-aided (relational databases, theory of automatic classification). Practical implications: Described methods were developed based on practical examples of the technological module systems creation for hydraulic cylinders used in mining, slag cars used in metallurgy and series of gears types. The represented methods are applied to the unit’s types of hydraulic servo-motors used in mining. Originality/value: Method of the technological similarity, the algorithmic method and CAM method are the basis for selection of technological features in the process, which creates the as ordered technology families (types and module systems of constructions). This method is characterized by a possibility to shorten time related to production preparation and series production increase.

10

Technological similarity in process of series of type technology creating

Gendarz P., Rząsiński R., Chyra P.

Journal of Achievements in Materials and Manufacturing Engineering

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2008

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Vol. 29, nr 2

159-162

EN

Purpose: Problems of research related to creating ordered series of type of technology is realized with the intention of replacement traditional methods of selection of technological features for processes of machining. This process is realized through replacement of repeatable stages with routined stages susceptible to computer aiding. Design/methodology/approach: This paper shows algorithmic understanding of getting input data in the process of creating ordered families of technology based on data of constructional. Basic tool of realization of data selection for the process of manufacture is the theory of technological similarity aided by computer programmes which is being elaborated. Findings: The basic result of the analyzed problem is the realization of relations between construction and technology for specified series of types of elements of machine engines. Apart from that, there has been also describe the theory of technological similarity with its essential constituents which determine input date of algorythmisation of processes of selection of technological features on bases of constructional features. Research limitations/implications: Described methods are closely related to the research on the process of construction and the theory of constructional similarity. Further analyses will be carried on in order to specify the theory of technological similarity in new forms of computer aiding (relational databases, theory of automatic classification). Practical implications: The represented methods are apply for series of type of units of servo-motors hydraulic practical in mining. Originality/value: Represented in article relations between construction and technology realized with use of theory of technological similarity they make up basic of the group technology. Method this is characterizes with possibility of shortening of times of preparation of manufacture and the enlargement of seriality of manufacture.

11

Incremental sheet forming process modelling - limitation analysis

Pohlak M., Majak J., Küttner R.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 22, nr 2

67-70

EN

Purpose: of this paper is incremental sheet forming (ISF) process modelling. Main attention is paid to limitation analysis. Two kinds of risks are considered: material failure and tool failure. Aim of the current study is to minimize both risks i.e. provide limits for safe manufacturing. Design/methodology/approach: Experimental, numerical and theoretical investigation is performed. The test procedures are designed for determining FLD and forming force components in ISF process. The ISF process is modelled using FEM software LS-DYNA (fully integrated shell elements). In numerical analysis the plastic anisotropy is considered (Hill's second and Barlat's higher order yield criteria). Findings: The influence of plastic anisotropy on two formability characteristics - FLD and forming load components is studied. In both cases the effect of plastic anisotropy is found to be significant. It is shown that variation of the Lankford coefficient(s) in range 0.5 - 3.0 may cause changes on the formability characteristics over ten percent. Research limitations/implications: Limitations on forming angle, complications with considering elastic spring-back. Practical implications: The estimates on forming load components can be used for tooling selection in order to avoid tool failure. The FLD can be used in order to separate safe and unsafe forming areas in ISF process. Originality/value: An approximate theoretical model is proposed (based on Iseki's model). Incremental sheet forming strategies for determining forming limit diagram (FLD) are pointed out.

12

Corrosion resistance of SAW duplex joints welded with high heat input

Nowacki J., Rybicki P.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 23, nr 2

7-14

EN

Purpose: test if the welding heat input exceeding the recommended values has negative impact on strength properties and corrosion resistance of the executed welded joints as well as description of influence of the heat input of submerged arc welding (SAW) of duplex steel UNS S31803 (0.032%C, 23.17%Cr, 9.29%Ni, 3.48%Mo, 0.95%Mn, 0.7%Si, 0.16%N, 0.017P, 0.006%S, 0.11%Cu) on welded joints microstructure, particularly average values of ferrite volume fraction, mechanical properties, and corrosion resistance. Design/methodology/approach: analysis of welding heat input influence on mechanical properties, value of ferrite share, and corrosion of test joints has been done. Non-destructive and destructive testing, e. g. visual examinations, microstructure examination, corrosion resistance tests according to ASTM G48 Method A, HV5 hardness tests, impact and tensile test were carried out. For analysis of welding heat input influence on creation of welding imperfections, there were executed welding of sheet of thickness 9, 14, 28 mm. Butt joints on plates of different thickness were made where the applied heat input of welding exceeded the 2.5 kJ/mm value. Maximum heat input level was HI lto 3.0; HI lto 3.5; HI lto 4.0; HI lto 4.5; HI lto 5.0. Findings: based on the performed tests the conclusion is that according to DNV Rules the welding heat input exceeding the recommended values has no negative impact on strength properties and corrosion resistance of the executed welded joints. It was shown that submerged arc welding of duplex steel with the heat input from 2.5 kJ/mm up to 5.0 kJ/mm has no negative influence on properties of the joints. Research limitations/implications: the welding heat input exceeding the recommended values may influenced the precipitation processes in the HAZ, what need further experiments. Practical implications: application of high value of the welding heat input will be profitable in terms of the welding costs. Originality/value: an original value of the paper is to prove that a usage of high value welding heat input provides the best joints quality.

13

Intelligent approach for optimal modeling of manufacturing systems

Gecevska V., Cus F., Lombardi F., Dukowski V., Kuzinowski M.

Journal of Achievements in Materials and Manufacturing Engineering

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2006

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Vol. 14, nr 1-2

97--103

EN

Purpose: This paper proposes a methodology for analysis and modeling of machining conditions by optimal determination of the cutting parameters in multi-pass NC machining operations. Design/methodology/approach: This paper proposes optimal determination of the cutting parameters by using a deterministic method (DM) and a genetic algorithm (GA). In the research, it is created the complex mathematical model for design of the cutting condition for machining process. In next phase, it is created a numerical algorithm for optimization and its developed software called OPTIMAD (Optimization of Milling and Drilling), by using DM. Also, it is created software, caled GAMO (Genetic Algorithm for Machining Operation), as a GA program modul based of the elementary pseudo-code for GA, with using the MatLAB program language and C++ developed rutines. Findings: Modeling of optimal cutting parameters, as a part of process planning, enables generating of manufacturing data and knowledge representation in machining process plan. Verification of optimized cutting parameters in real machining condition has done confirmation for design of cutting parameters by virtual modelling, using optimization methodologies OPTIMAD and GAMO. Research limitations/implications: The optimization approach is proposed and its uses optimization of mathematical model using a classic and heuristic methods. In this research, GA based optimization method and deterministic optimization method are developed and there implementations into real manufacturing process are analyzed. Practical implications: Use of proposed approach resulted in improved productivity and efficiency of machining process where the cutting conditions are designed by OPTIMAD and GAMO softwares. In the future, this results will be integrated in computer system for process planning. Originality/value: The paper describes a method for eliminating the need for using the extensive user intervention in CAM processes, during determination of cutting parameters.

14

Influence of heat input on corrosion resistance of SAW welded duplex joints

Nowacki J., Rybicki P.

Journal of Achievements in Materials and Manufacturing Engineering

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2006

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Vol. 17, nr 1-2

113--116

EN

Purpose: Purpose of this paper is description of influence of the heat input of submerged arc welding (SAW) of duplex steel UNS S31803 on welded butt joints corrosion resistance. Design/methodology/approach: Butt joints on plates of 9-30 mm thickness were executed where the applied heat input of welding exceeded the 2.5 kJ/mm value. Maximum heat input level was HI ≤ 3.0; HI ≤ 3.5; HI ≤ 4.0; HI ≤ 4.5; HI ≤ 5.0. Analysis of welding heat input influence on mechanical properties, value of ferrite share, and corrosion of test joints has been done. Non-destructive and destructive testing, e. g. visual examinations, microstructure examination, corrosion resistance tests according to ASTM G48 Method A, HV5 hardness tests, impact and tensile test were carried out. For analysis of welding heat input influence on creation of welding imperfections, there were executed welding of sheet of thickness 9, 14, 28 mm. Findings: It was shown that submerged arc welding of duplex steel with the heat input from 2.5 kJ/mm up to 5.0 kJ/mm has no negative influence on properties of the joints. Based on the performed tests the conclusion is that according to DNV Rules the welding heat input exceeding the recommended values has no negative impact on strength properties and corrosion resistance of the executed welded joints. Research limitations/implications: Research implications the welding heat input exceeding the recommended values should influenced the precipitation processes in the HAZ, what need further experiments. Practical implications: Application of high value of the welding heat input will be profitable in terms of the welding costs. Originality/value: An original value of the paper is to prove that a usage of high value welding heat input provides the best joints quality.

15

Symulacja cieplna procesu tworzenia warstwy kompozytowej na odlewie modelowym

Baron C., Szajnar J., Gawroński J., Bartocha D.

Archiwum Odlewnictwa

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2006

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R. 6, nr 21/1

17-32

PL

W artykule przedstawiono wyniki cieplnej symulacji tworzenia warstwy kompozytowej na staliwnym odlewie modelowym. Celem badań było wyznaczenie parametrów technologicznych procesów tworzenia warstwy kompozytowej, dla których można uzyskać dobrej jakości warstwę zbrojacą o pożądanej grubości. Dla założonych zmian wybranych parametrów technologicznych wyznaczono rozkład temperatury w odlewie modelowym oraz przebieg zmian temperatury w charakterystycznych punktach wkładki kompozytowej. Obliczenia numeryczne wykonano przy pomocy programu NovaFlow&Solid 2.9 r81. Uzyskanie warstwy kompozytowej dobrej jakości i o pożądanej grubości na odlewie jest uzależnione od procesu i poziomu temperatury zalewania w trakcie odlewania. Badania pozwoliły ustalić, jakie parametry technologiczne wpływają na ten proces i jakie kryteria powinna spełniać technologia odlewania tego typu odlewów. Dzięki otrzymanym wynikom można opracować wytyczne i zasady projektowania konstrukcji i doboru parametrów technologicznych wykonywania odlewów zbrojonych powierzchniowo.

EN

In article the results of thermal simulation of formation composite layer on model cast steel casting process have been presented. The aim of researches was determination of technological parameters of formation composite layer process for which is possible to obtain good quality reinforcement layer with desirable thickness. For assumed changes of chose technological parameters, distribution of temperature in model casting as well as course of temperature changes in characteristic point of composite insert have been determined. Simulations have been carried out for two different materials of compositing element (insert) and three different pouring temperatures with software NovaFlow&Solid 2.9 r81. Obtaining good quality and with desirable thickness composite layer depends on process and level of heating during casting process. Researches made possible to determination which technological parameters directly influent on this process and how criterions should be meet by casting technology of this kind of casting. Obtained results and their experimental verification will make possible to form basic to work out guidelines and principles for design technology of casting with composite layer on choose surfaces productions.

16

Technical design project modernization as a basis for implementing food safety assurance systems in foodservice

Grzesińska W., Mieszkalska A.

Technical Sciences / University of Warmia and Mazury in Olsztyn

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2005

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nr 8

41-48

EN

The objective of this study was to modernize a technical design for a student's canteen in the SGGW (Warsaw Agricultural University) Campus. Before the design was modernized, a questionnaire survey had been carried out among students to identify their expectations in relation to foodservice. The modernization took into consideration the technical conditions of the canteen building shown in the design, students' expectations and hygienic demands. The survey showed that the canteen should offer a wide assortment of food products, main meals as well as snacks (e.g. chips, salad) and hand snacks (e.g. bar, coffee). The survey revealed that food products offered in the canteen should be exposed in display cases to allow students to select meal components. The new functional layout was designed to prevent cross contamination between and during operations with foodstuffs, equipment, materials, water, air supply or personnel and external sources of contamination. In addition, guidelines to be followed in order to select the most appropriate equipment and to minimize the risk of food contamination were established.

PL

Poddano modernizacji projekt technologiczny nowo budowanej stołówki studenckiej w campusie SGGW. Zaproponowano poprawki w projekcie technologicznym, uwzględniając uwarunkowania techniczne projektu, wymogi GMP oraz wyniki badań ankietowych ujawniające oczekiwania studentów. Z badań ankietowych wynika, że w stołówce oprócz dań obiadowych powinno się oferować szeroki asortyment przekąsek, w tym również przekąsek na wynos. Posiłki powinny być wyeksponowane w witrynach. Opracowany układ funkcjonalny pomieszczeń wyeliminował możliwość skażeń żywności powstałych w wyniku krzyżowania brudnych operacji technologicznych z czystymi, co występowało w pierwotnym układzie funkcjonalnym. Ilość i rodzaj dobranego wyposażenia umożliwia produkcję różnorodnych dań. Szczegółowe wytyczne zawarte w projekcie, dotyczące jakości urządzeń, ich ustawienia oraz wykończenia wnętrz, dają podstawę do zapewnienia bezpieczeństwa produkcji żywności, a także wdrożenia systemu HACCP.

17

Wymagania bhp oraz ergonomii

Gilewicz A.

Wiadomości / Izba Projektowania Budowlanego

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2001

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nr 5

16--17

18

Bhp w projektach technologicznych

Gilewicz A.

Wiadomości / Izba Projektowania Budowlanego

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2001

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nr 10

26--27