Wyniki wyszukiwania - BazTech

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Numerical and Experimental Study of Producing Two-Step Flanges by Extrusion with a Movable Sleeve

Winiarski G., Gontarz A.

Archives of Metallurgy and Materials

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2017

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Vol. 62, iss. 2A

495--499

EN

The paper presents a new metal forming process for producing two-step external flanges on hollow parts. With this method, the flange is extruded by a movable sleeve, which moves in the opposite direction to the punch. This reduces the phenomenon of buckling of the tube wall, which allows extruding flanges with relatively large volumes. The new method was applied to produce a two-step flange on the end of a tubular billet made of 6060 aluminum alloy. This cold metal forming process was designed based on numerical simulations and experimental tests. The effect of the basic technological parameters on metal flow was investigated and limitations of the process were identified. The experimental results confirmed the possibility of forming a two-step flange with a diameter that is approximately twice as big as the external diameter of the tubular billet.

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The influence of tool geometry on the course of flanges radial extrusion in hollow parts

Winiarski G., Gontarz A., Dziubińska A.

Archives of Civil and Mechanical Engineering

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2017

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Vol. 17, no. 4

986--996

EN

In this paper the different methods of hollow parts with flange manufacturing are presented. The results of theoretical–experimental research on radial extrusion of hollow parts with flanges are shown. In the research the pipe parts form 6060 aluminum alloy formed in ambient temperature were used. The influence of tool geometry in forming zone was investigated. Experimental research was made in special equipment placed into workspace of laboratory testing machine. Numerical simulations were made by means of Deform-3D software. In the results, the distributions of stress, strains, Cockroft–Latham criterion and loads are presented.

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Wpływ wybranych parametrów technologicznych na przebieg procesu kształtowania kołnierzy metodą wyciskania z ruchomą tuleją

Winiarski G., Gontarz A.

Rudy i Metale Nieżelazne Recykling

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2016

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R. 61, nr 5

205--212

PL

W artykule przedstawiono wyniki analizy numerycznej procesu kształtowania kołnierzy w wyrobach drążonych metodą wyciskania z ruchomą tuleją. Obliczenia przeprowadzono metodą elementów skończonych wykorzystując w tym celu oprogramowanie DEFORM-3D. Jako materiał wsadowy wykorzystano stop aluminium PA38, który poddano wyciskaniu w temperaturze otoczenia. Analizie poddano wpływ promienia zaokrąglenia tulei ruchomej oraz siły jej docisku na przebieg procesu. W analizowanych przypadkach przyjęto stałą średnicę zewnętrzną kołnierza. Dodatkowo przedstawiono koncepcję przyrządu umożliwiającego weryfikację doświadczalną procesu. Przedstawione wyniki badań dotyczą porównania analizowanych przypadków w aspekcie poprawności uzyskanego wyrobu oraz parametrów siłowych procesu.

EN

The paper presents the results of a numerical analysis of a process for forming flanges in hollow parts by radial extrusion with a moving sleeve. The computations were performed by the finite element method using the simulation programme DEFORM-3D. The PA38 aluminium alloy was used as the billet and it was subjected to extrusion in ambient temperature. The analysis involved determination of the effect of the corner radius of the moving sleeve and its load on the process. In the examined cases, the flange had a constant outside diameter. In addition to this, the paper describes the design of a device enabling experimental verification of the proposed method. The results of the investigated cases are compared with respect to product shape and force parameters in the process.