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

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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Mark Naber
Product Manager
mnaber@elcee.nl +31 78 654 47 57
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