Overview
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Read the articleAUTHORS
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Guy BOSTBARGE: Arts et Métiers engineer - General Manager, Amis
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Henri FAURE: Engineer from Arts et Métiers and École supérieure de soudure autogène - Director of Amis
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Yann GOBARD: Engineer from the École supérieure de l'énergie et des matériaux and graduate of the Mise en forme center at the École des mines de Paris. - Deputy production manager and head of design and methods at Amis
INTRODUCTION
Cold forging (or extrusion) has already been described in a previous article. .
Setting up a forging range involves determining the geometry of the various operations and designing and building the tooling.
Simulation reduces the number of actual tests, and cuts development times for new ranges.
Extrusion of a part can be conceived either in the case of a new part that needs to be produced at lower cost, or for which functional problems need to be solved, or in the case of an existing part whose manufacturing method needs to be changed for the same reasons as above.
Examples will be given for each of these two cases.
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Steel cold forging
Development of a forging range
Bibliography
Economic data
In France, there are two types of forge: integrated forges belonging to automakers, and stand-alone forges. Production by stand-alone forges alone rose from 4,850 t in 1970 to around 34,000 t in 1996. Figure A shows the evolution of tonnage delivered by stand-alone forges. At present, the automotive industry accounts for 94% of independent forges' output. The remainder is divided mainly between agricultural machinery and...
Websites
SNEF http://www.3s.hmg.inpg.fr
Friends http://www.amis-extrusion.fr
CEMEF http://www.ensmp.fr
Extruders
(non-exhaustive list)
FRIENDS
Gevelot
Fomer
Ascoforge SAFE
Setforge
Further information is available from SNEF (Syndicat national de l'estampage et de la forge).
Main software
(non-exhaustive list)
Forge 2 (2D calculation)Forge 3 (3D calculation)
DEFORM (2D/3D)
MarcAutoForge (2D/3D)
MSC SuperForge
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