Wyniki wyszukiwania - Biblioteka Nauki

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Additive and Subtractive Manufacturing of Inconel 718 Components - Estimation of Time, Costs and Carbon Dioxide Emission – Case Study

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Zębala W. , Gaweł A.

Advances in Science and Technology. Research Journal

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2024

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tom Vol. 18, no 1

98--109

EN

The article presents the cost analysis of three techniques that can be used to produce a cylindrical part from Inconel 718 nickel alloy. First of them allows the part to be shaped by additive manufacturing (AM). In the second technique the shape is obtained by forging. Both techniques require the use of machining to give the final dimensional and shape accuracy of the manufactured part. The third technique is based solely on machining operations. Research has shown that the most expensive technique for high-volume production is SLM/LMF. Based on the case study, it can be concluded that after a year of production using the SLM/LMF, forging and machining methods, the carbon dioxide emission is the biggest in the additive manufacturing. Optimizing the Ra and Fc parameters causes differences in carbon dioxide emissions. The turning process including machining optimization due to Fc characterizes a higher ability to produce parts than optimization due to roughness parameter Ra.

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Sposoby chłodzenia strefy skrawania w efektywnym wytwarzaniu części maszyn

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Zębala W. , Struzikiewicz G.

Stal, Metale & Nowe Technologie

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2021

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tom nr 7-8

24--34

PL

W procesach obróbki skrawaniem stosuje się różne sposoby doprowadzenia płynu chłodzącego do strefy tworzenia wióra w celu zwiększenia wydajności obróbki, zmniejszenia stopnia zużycia narzędzia oraz optymalizacji kosztów wytwarzania. Konwencjonalny, zalewowy sposób chłodzenia strefy skrawania charakteryzuje się wysokimi kosztami zakupu i utylizacji cieczy chłodząco- -smarujących (CCS) oraz negatywnym wpływem na środowisko naturalne i zdrowie pracowników. Obecnie prowadzi się szereg badań w celu osiągnięcia wysokiej efektywności chłodzenia przy stosowaniu jak najmniejszej ilości płynu chłodzącego. Opracowuje się różne strategie chłodzenia/smarowania alternatywne do konwencjonalnego chłodzenia zalewowego. W artykule przedstawiono krótką charakterystykę najczęściej stosowanych sposobów chłodzenia strefy skrawania oraz ich kierunki rozwoju w zakresie zwiększenia efektywności wytwarzania części maszyn.

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Testing and modeling the possibility of using a lamellar grinding wheel with an adaptive background structure

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Zębala W. , Młynarski S. , Ślusarczyk Ł.

Eksploatacja i Niezawodność

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2024

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tom Vol. 26, no. 2

art. no. 183318

EN

In the article, the authors present the concept of a mathematical model used to study the influence of the properties of the base materials used to produce an innovative abrasive wheel background on the operating characteristics of the final tool. This model will be used to verify various material and construction solutions. The article also covers the outcomes of research that confirm the developed model’s effectiveness in relation to the operation of lamellar grinding discs, as per their intended technological goal. The experiments involved surface grinding with grinding wheels constructed on chosen backgrounds. A dedicated research stand was designed to measure the temperature in the grinding zone without direct contact, using both new and used grinding discs. The tests incorporated various load levels applied by the grinding disc on the workpiece, as well as different working angles of the grinding disc.

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Study on Chip Breakability Index During Longitudinal Turning of Cast and DMLS Additively Manufactured AlSi10Mg Aluminum Alloy

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Struzikiewicz G. , Słodki B. , Zębala W. , Franczyk E.

Advances in Science and Technology. Research Journal

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2022

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tom Vol. 16, no 1

28--35

EN

The article presents selected issues related to the process of turning samples made of the AlSi10Mg alloy with the use of various manufacturing technologies, i.e. casting and DMLS (Direct Metal Laser Sintering). Machining processes of cylindrical surfaces of samples made with these two methods were subjected to a comparative analysis. The main idea behind the research was to develop guidelines for turning parts obtained using laser powder sintering. Study on the influence of cutting parameters on the value of breakability index Cin. as well as the type, shape and form of chips produced during longitudinal turning is presented. The chips were also measured and the results of the microscopic analysis of the chips form are described. Results showed that the values of Cin index for turning of the cast AlSi10MG alloy depend mainly on the value of feed f. According to adopted chip classification for the feed value of f > 0.1 mm/rev the chips had a favorable, short form. In the case of turning the sample obtained by the DMLS method, the values of the chip breakability index Cin are not significantly dependent on the adopted ranges of cutting parameters. The Taguchi method was used to develop the conclusions obtained on the basis of the research results.