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Home page > 02. Know-how > Cold forging (or precision forging)

Cold forging (or precision forging)

Cold forging (or cold extrusion ) is a process of forming out of metal solid or hollow parts that are generally axially symmetrical by the plastic deformation of a raw material known as a slug. Although this technique needs stronger tools and more powerful machines than forging by other methods, the precision and the surface condition obtained are much better.

The development of cold forging is the result of the many direct or indirect economic benefits that have appeared during the design, manufacture and use of the products being made:

  • volume of the material used close to that of the finished part,
  • improvement of the mechanical properties through cold working, which eliminates the need for heat treatment and optimises the geometry and dimensions of the part,
  • the possibility of automating and grouping together several operations (transfer press) resulting in higher stroke rates and cheaper operation,
  • high precision (a few hundredths of a millimetre for cold forging up to a few tenths for warm forging) and surface condition of excellent quality (Ra 0.5 to 4),
  • excellent grain flow, which is needed to ensure good mechanical performance and resistance to metal fatigue.

S.A. GÉVELOT EXTRUSION - 6, Bd Bineau - 92532 Levallois-Perret Cedex (France) - Tél. +33 (0)1 41 49 03 33 - Fax : +33 (0)1 47 48 90 37 | Site Map |
Réalisation : Mediapilote