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Modern Reverse Engineering Methods Used to Modification of Jewelry

Kroma Arkadiusz, Adamczak Oliwia, Sika Robert, Górski Filip, Kuczko Wiesław, Grześkowiak Krzysztof

Advances in Science and Technology. Research Journal

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2020

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Vol. 14, no 4

298--306

EN

The article presents the results of research aimed at redesigning a jewelry product with the use of modern reverse engineering methods. A detailed review of the literature was conducted and the essence of the application of this technology in the era of Industry 4.0 was presented. The 3D digitization of the research object was performed with the use of Aicon SmartSCAN-HE R8 and DAVID-SLS3 scanners. The obtained better quality file was edited in Autodesk Meshmixer 3.5 software. On the basis of the created model, a 3D print was made using FDM (Fused Deposition Modeling) and DPP (Daylight Polymer Printing) technology with two different materials – HIPS (High Impact Polystyrene) and photopolymer casting resin. The final stage of the work was the measurement of the surface roughness of the B101 (CuSn10P) tin-phosphorus alloy castings made using the method of investment casting.

2

Application of 3D Printed Casting Models for Disamatch Forming Method

Bernat L., Kroma A.

Archives of Foundry Engineering

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2019

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iss. 4

95--98

EN

This paper presents results of a research on the possibilities of applying 3D printed casting models for small production series as alternative to traditional tooling production on automated DisaMatch mould production lines. The main task was to verify and compare the dimensions of the 3D printed models before and after moulding process. The paper discusses main advantages and disadvantages of the 3D printing methods used like FDM (Fused Deposition Modeling)/FFF (Fused Filament Fabrication), SLA (stereolitography) and DPP (Daylight Polymer Printing). Measurement of casting model outside dimension change resulting from moulding sand friction on their surface was made with the use of GOM INSPECT software on the basis of 3D scans made with ATOS TripleScan optical scanner. Hardness of 3D printed models made of ABS, Z-ULTRAT, three different photopolymer resins (from FormLab and Liquid Crystal companies) was verified. The result of the research printed models usability for the foundry industry was presented.

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Porównanie dyskontowych wskaźników oceny opłacalności ekonomicznej inwestycji na wybranym przykładzie

Michalak J.

Poznan University of Technology Academic Journals. Electrical Engineering

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2016

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No. 86

79--86

PL

W artykule przedstawiono i przeanalizowano podstawowe dyskontowe wskaźniki oceny opłacalności ekonomicznej inwestycji takie jak: CKR – całkowite koszty roczne, NPV – wartość bieżącą netto, DPP – zaktualizowany okres zwrotu, PI – wskaźnik rentowności, IRR – wewnętrzną stopę zwrotu. Następnie dokonano analizy porównawczej wybranych wskaźników, oceniając, który z rozpatrywanych wariantów jest najkorzystniejszy. Wszystkie obliczenia przeprowadzono w oparciu o rachunek dyskonta, uwzględniając zmienność wartości pieniądza w czasie. Jako narzędzie wykorzystano program Excel. Analizę wykonano dla elektrociepłowni dla dwóch rodzajów paliwa (węgla kamiennego i biomasy), rozpatrując trzy warianty. Wariant pierwszy dotyczy spalania biomasy, wariant drugi spalania węgla, w wariancie trzecim mamy do czynienia z układem hybrydowym węgiel i biomasa.

EN

The article presents and analyzes the basic discount indicators of economic viability of investment such as: CKR – the total annual cost, NPV – net present value, the DPP – updated payback period, PI – rate of return, IRR – internal rate of return. Then a comparative analysis of selected indicators, assessing which of the options under consideration is most preferred. All calculations were performed on the basis of bill discounting, taking into account the volatility of the value of money over time. As a tool used Excel. The analysis was performed for the power plant for two types of fuel (coal and biomass), considering three variants. The first option applies to biomass, the second option of burning coal, the third variant we are dealing with a hybrid system coal and biomass.

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Ekonomiczny aspekt stosowania paliwa LNG w pojazdach transportu miejskiego

Radkowski S., Rogowski W., Szczurowski K., Zieliński Ł.

Logistyka

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2014

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nr 6

9064--9071

PL

W pracy przygotowano analizę opłacalności inwestycji polegającej na zakupie pojazdów autobusowych zasilanych gazem LNG przez przedsiębiorstwo X. W artykule uzasadniono podjęcie danego tematu pracy, przyjęto założenia, które będą podstawą obliczeń. Przytoczono wytyczne dyrektywy 2009/33/WE. W kolejnym rozdziale dokonano analizy opłacalności stosowania silników zasilanych LNG w autobusach miejskich. Metodyka obliczenia opłacalności opierać się będzie na LCC (Life Cycle Costs). Sposób wyznaczania opłacalności inwestycji opierać się będzie na metodzie NPV (Net Present Value). W celu wyznaczenia minimalnego okresu trwania inwestycji posłużona się metodą DPP (Discounted Payback Period) czyli zdyskontowany okres zwrotu nakładów inwestycyjnych. Uwzględniając przyjęte założenia i uproszczenia, próba ta pozwala stwierdzić, że inwestycja w autobusy LNG jest słuszna i bieżące monitorowanie kosztów obsługi pozwoli na bardzo dokładną analizę w przyszłości.

EN

This article was prepared analysis of the profitability of investment involving the purchase of buses fueled with LNG by company X. The article was justified to take the topic of work, assumptions that are the basis for calculations. Quoted provisions of Directive 2009/33 / EC. The next chapter analyzes the viability of the use of LNG-fueled engines in city buses. Methods of calculation based on the cost-effectiveness of LCC (Life Cycle Costs). Method of determining the profitability of investments is based on the method of NPV (Net Present Value). In order to determine the minimum duration of the investment posłużona the DPP method (Discounted Payback Period). Taking into account the assumptions and simplifications, this test shows that investment in LNG buses is correct and current monitoring service costs allow for a very precise analysis in the future.

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Nanodiamonds

Mitura S.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 24, nr 1

166-171

EN

Purpose: Diamond nanoparticles have been found in DLC films, in detonation products of explosives and in some type of meteorites. In this paper the results of physico-chemical examinations - also in vitro and in vivo - of Nanocrystalline Diamond Powder Particles (DPP) and Detonation Nanodiamond (DND) are reported. Design/methodology/approach: Material characterizations of DPP have been evaluated by using: Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Auger electron spectroscopy (AES), microX-Ray Spectroscopy. Biological investigation based on: (a) in vivo and (b) in vitro examinations as well (c) clinical investigations - contact allergy. Findings: It has been proven that Diamond Powder Particles (DPP) may act as antioxidant and/or anti-inflammatory factors when applied in living systems. It seems probable that reactions between the diamond surface and some biologically important molecules play a significant role in this process. Research limitations/implications: The mechanism of antioxidant and/or anti-inflammatory behavior of DPP is not yet fully understood. Practical implications: Nanocrystalline diamonds can be dispersed in a biologically acceptable carrier to form various compositions. DPP can be included in a cream having bioactive properties. Originality/value: Bioactivity of Diamond Powder Particles.

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Carbon coatings for medical implants

Grabarczyk J., Batory D., Louda P., Couvrat P., Kotela I., Bakowicz-Mitura K.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 20, nr 1-2

107-110

EN

Purpose: In this paper we report in vitro and in vivo results of Nanocrystalline Diamond Coatings which are used in medicine onto medical implants. The very important property of carbon coatings is the protection living organism against the metalosis. Different medical implants with complicated shapes are covering by Nanocrystalline Diamond Coatings by RF dense plasma CVD. Design/methodology/approach: 1) Material characterizations of deposited coatings have been evaluated by using: Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Auger electron spectroscopy (AES), micro X-Ray Spectroscopy and bend test 2) Biological investigation based on: (a) in vivo and (b) in vitro examinations as well (c) clinical investigations - contact allergy. Findings: It was revealed that Nanocrystalline Diamond Coatings form the barrier diffusion between implant and human environment as a consequence prevent leaching of metallic ions into the body. Additionally, the research on carbon coatings proved that diamond layers are biocompatible with living organism. Contact allergy on nickel is inhibited by diamond powders. Practical implications: Practical application metal implants with NCD in orthopedy, cardiosurgery, oral surgery, maxillo-facial surgery and dermatology. Originality/value: We have observed anti-inflammatory, antiallergic and anticancerogenic responses from the carbon coatings layers onto medical implants like wires and screws.