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1

Sintered Diamond Tools - the Past, Present and Future

Konstanty Janusz

Archives of Metallurgy and Materials

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2021

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Vol. 66, iss. 2

593--599

EN

The methods of making diamond tools have undergone a remarkable development since the invention of synthetic diamond in the mid-1950s. The current review summarises key historical, recent and ongoing trends and developments in sintered diamond tools. The report concentrates on tools used within the stone and construction industries which, being the main consumers of metal-bonded diamond tools fabricated by powder metallurgy (P/M) technology, have always fuelled advances in tool design and production technologies.

2

An Overview of Numerical Optimization Applications for Friction Stir Welding

Tutum C., Hattel J. C.

Computer Methods in Materials Science

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2013

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Vol. 13, No. 1

153--159

EN

Recent advances in the computational power, and at the same time, the software that is capable of taking advantage of the new hardware architecture promote numerical modelling activities for the Friction Stir Welding (FSW) process as in parallel with other engineering applications. All these developments provide a stronger basis for understanding of the FSW process by enabling inclusion of more detailed multi-physics phenomena, i.e. complex interaction among material behaviour, microstructure evolution, material flow, heat generation, etc. A source of motivation behind all these efforts is the increasing demand for the FSW process mainly in aerospace and automotive industries. However the list of unknowns for the success of the process (e.g. defect free welds) is not yet cleared up. Tool design and process parameter optimization studies are in general limited by design of experiments and those rarely supported by the statistical analysis tools. One of the main reasons for the lack of the autonomous optimization studies, in which the numerical FSW simulations are used for response evaluations, is still the high computational cost. Here in this review paper, a brief overview of remarkable achievements together with the discussion of the limitations in the numerical FSW optimization studies are laid on the table.

PL

Rozwój komputerów i oprogramowania, które wykorzystuje nową architekturę sprzętową umożliwia obecnie modelownie numeryczne procesu spawania tarciowego (ang.: Friction Stir Welding - FSW). Modelowanie zjawisk zachodzących w trakcie spawania prowadzi do lepszego zrozumienia procesu FSW poprzez wprowadzenie do modelowania złożonych zależności pomiędzy zachowaniem się materiałów, zmian mikrostruktury, płynięcia materiału, generowania ciepła. Motywacją do tych badań jest coraz szerzej stosowany proces FSW głównie w przemyśle samochodowym i lotniczym. Modelowanie tego procesu jest skomplikowane, a liczba niewiadomych decydujących o własnościach spawu (np. spawy wolne od defektów) nie jest do końca znana. Możliwości optymalizacji projektowania narzędzi oraz parametrów procesu FSW są ograniczone, ponieważ nie stosuje się metod projektowania doświadczenia i analizy statystycznej ze względu na wciąż wysokie koszty obliczeniowe numerycznej symulacji tego procesu. W niniejszym artykule przedstawiono krótki przegląd najważniejszych osiągnięć wraz z dyskusją o ograniczeniach w optymalizacji procesu FSW wykorzystującej numeryczne modelowanie.

3

Numerical modeling of the welding phenomenon in forward aluminium extrusion process

Piwnik J., Kuprianowicz J., Mogielnicki K.

Archives of Foundry Engineering

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2011

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Vol. 11, iss. 2 spec.

191--194

EN

There is often need to use welding methods in the aluminium alloys extrusion processes. Welding methods while extruding are divided in to transverse and longitudinal one. In paper the energy criterions for transverse and longitudinal joining during extrusion of aluminium alloys in warm conditions are showed. Numerical simulation results for two cylindrical billets transverse joining, during forward extruding with using the flat punch are presented. Irregularity in the billets material flow and presence of a void are proved. In order to equalization the flowing billets volumes streams, the numerical model for forward extrusion of cylindrical billets, with using the punch with a toe and initially formed upper billet is proposed. The application of this method causes both transverse and longitudinal welding schemes appearing. Combination of two welding schemas gives the product, which has a core made of material from the upper billet and external layers of the lower billet.

4

Reconfigurable Machine Tool: methodology of RMT design

Aladad H., D'Acunto A., Martin P.

Journal of Machine Engineering

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2008

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Vol. 8, No. 1

19--32

EN

Reconfigurable Machine Tool (RMT) is the active issue to realize both the flexibility and productivity of manufacturing systems and satisfy the mass-customization production. The purpose of this paper is to present a RMT design methodology. Specifically, the part analysis and the RMT architectural modelling. The method of RMT design is focused on a simultaneous machining process using multi-spindle in a single RMT. Based on the concept of machining features, the process data, retrieved as a starting point in identifying various functions necessary to carry out a given part family, are displayed. Moreover, geometrical and kinematical architectures of RMT are defined as a result of the specification of all manufacturing processes of features to be machined. Where, all architectural solutions and the criterions related to select the suited solution are presented. Our methodology presents all activities allowing to pass from machining features of part to be machined to the structure of RMT.

5

Nowoczesne metody projektowania i wytwarzania narzędzi - na przykładzie przemysłu szklarskiego

Balic J.

Inżynieria Maszyn

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2000

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R. 5, z. 1/2

162-175

PL

Artykuł dotyczy zwinnego wytwarzania i wprowadzenia nowych technologii do produkcji narzędzi dla potrzeb przemysłu szklarskiego przy produkcji butelek. Omawia zasady równoczesnego konstruowania i wytwarzania (agile manufacturing). Opracowano pilotażowy system elastycznej produkcji i przedstawiono analizą przypadku zaprojektowania, zaprogramowania wytwarzania i zbudowania narzędzia dla potrzeb produkcji butelek.

EN

The paper deals with the development and introducing of new technologies in production of tools for bottle and glass industry. The principles of simultaneous engineering and agile manufacturing are discussed. Pilot FMS was developed and a case study for design, manufacturing programming and manufacturing of tool for bottle industry is presented.