Product made by closed die forging
Forgings

Closed die forging

Homogeneous products, with excellent mechanical characteristics

Closed die forging

Closed die forging can produce homogeneous products, with excellent mechanical characteristics.

Benefits

  • Good repeatability
  • Highly homogeneous material with mechanical properties
  • High production speed
  • Economical process compared with welding assemblies

Possible alloys

  • Steel, alloy steel, tool steel and stainless steel
  • Aluminium, bronze and copper alloys

Technical specifications

  • The tolerances of steel forgings are as per EN 10243-1, and the following criteria are decisive:
    • Forge weight
    • Shape of the tool division
    • Category of the steel (high or low alloy)
    • Form complexity factor, which depends on the factor between the weight of the component and the envelope weight
  • Weight: Approx. 200 grams – 120 kg, while shaft products can weigh up to 200 kg
  • Maximum dimensions: length 1,200 mm
  • Forging wall thickness: ≥ 4 mm
  • The geometric tolerances that are required for the function should be specified in the drawing
  • The most important tolerances apply to:
    • Length, width, height and thickness dimensions
    • Finishing of the forging edge
  • An adequate draft angle should be provided; a good guideline is at least 3° for aluminium and 5° to 7° for steel
  • Use large radii to avoid quick tooling wear or cracks in forgings
  • Ribs should be low and wide
  • The various cross-sections must be balanced to prevent extreme variations in the flow of the metal
  • The tooling division must run through the centre of the forging and not along one side. The forging needs to be detachable from this division

Finishing options

  • Electrolytic zinc plating
  • Hot-dip galvanising
  • Vibra-polishing
  • Blasting
  • Primer, wet painting and powder coating
Closed the forging can produce homogeneous products, with excellent mechanical characteristics

PROCESS closed die forging

A video that shows the process of closed die forging.

Highlights closed die forging

Get in touch

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