Flexible tooling for vibration-assisted microforming

• Autorzy: Presz W. , Andersen B.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Miniaturisation generates necessity of micro-parts production. Micro-scale means closer tolerances and better surface roughness. These requirements can be achieved with metal forming processes but under high pressure and sufficient relative sliding distance between tool and workpiece surface. It makes such a process proven to galling. This tendency increases with diminishing of component dimensions. It means that retarding undesirable surface phenomena with special regard to galling becomes a critical factor for microforming. Literature search and previous investigations shows that implementation of vibrations might be a solution for limitation of galling tendency in microforming. Design/methodology/approach: The group of so called "reference micro-components" has been chosen as an representation of micro-products. For these parts with FEM basic processes parameters were found. The tooling system for vibration microforming of referenced parts has been designed. Vibrations are performed with vibrators based on stacked ceramic multilayer technology assuring accurate frequency and amplitude control. Findings: The method based on static and dynamic analytical and FEM calculations of proper design of vibration assisted flexible tooling with piezo-vibrators has been found. Research limitations/implications: Proposed reference micro-components and designed system can be used for investigations of technological parameters for utilisations of microforming. Practical implications: Flexible laboratory system is designed to manufacture a wide range of microcomponents using tools vibrations for improving quality of products. After laboratory investigations it is attended to design industrial system working on same principles. Originality/value: Designed within this project flexible tooling for low frequency vibration assisted microforming seems to be original according to literature investigations.

Słowa kluczowe

EN

plastic forming; microforming; vibrations; flexible tooling

PL

obróbka plastyczna; mikroformowanie; wibracje; narzędzie

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 21, nr 2
• Strony: 61--64
• Opis fizyczny: Bibliogr. 17 poz., rys., tab.

Twórcy

autor

Presz W.

autor

Andersen B.

• Institute of Materials Processing, Warsaw University of Technology, Narbutta 85, 02-524 Warsaw, Poland,

Bibliografia

• [1] W. Presz, A. Rosochowski, The influence of grain size on surface quality of microformed components, Proceedings ESAFORM 2006 Conference, Glasgow, 587-590.
• [2] A. Rosochowski, W. Presz, L. Olejnik M. Richert, Micro-extrusion of ultra-fine grain aluminium, Multi-Material Micro Manufacture 4M2005, Oxford (2005) 161-164.
• [3] N. Tiesler, Microforming - Size effects in friction and their influence on extrusion process, Wire 52 (02) 34-38.
• [4] F.K. Garskii, V.I. Efromov, Effect on ultrasound on the decomposition of solid solutions, Izviestia Akademii Nauk Belorousk SSR, 3 (1953), (in Russian).
• [5] F. Blaha, B. Langenecker, Strain of zinc monocrystals under the effect of ultrasonic vibration, Naturwissenschaften, 42 556 (1955), (in German).
• [6] L. Lang, X. Li, Wire drawing with ultrasonic vibration, Wire Industry, January 1994.
• [7] K. Siegert, A. Mock, Wire drawing with ultrasonically oscilating dies, Journal of Materials Processing Technology 60 (1996) 657-660.
• [8] B. Langenecker, S. Illiewich, O. Vodep, Basic and applied research on metal deformation in macrosonic fields at PVL Austria, Proceedings of Ultrasonics International 1973, 34-37.
• [9] G.R. Dawson, C.E. Winsper, D. H. Snasome, Application of high- and low-frequency oscillation to the plastic deformation of metals, Metal Forming, April, 1970, 158-162.
• [10]D. Godfrey, Vibration reduces metal to metal contact and causes an apparent reduction in friction, ASLE 10 (1967) 183-192.
• [11] K. Sieger, J. Ulmer, Influencing the Friction in Metal Forming Process by Superimposing Ultrasonic Waves, Annals of the CIRP, 50/1 (2001) 81-84.
• [12] K. Sieger, J. Ulmer, Reduction of sliding friction b ultrasonic waves, Production Engineering 1 (1998), 9-12.
• [13] W. Presz, B.G. Ravn, J. Sha, B.Andersen, T. Wanheim, Application of piezoelectric actuators in pressing process with vibrating tools, Proceedings of KomPlasTech 2005 Conference, 155-162 (in Polish).
• [14] W. Presz, Micro-punching with vibrating punch, Proceedings of ICIT 2005 Conference, 93-95.
• [15] W. Presz, The influence of punch vibration on surface phenomena in micro-extrusion, Proceedings of ESAFORM 2006 Conference, Glasgow, 583-586.
• [16] Noliac A/S, Hejreskovvej 18, Kvistgaard, www.noliac.com
• [17] W. Presz B. Andersen, T. Wanheim, Piezoelectric driven Micro-press for microforming, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 411-414.