The quality of the surface varies depending on the alloy, the condition of the tool, the design of the profile as well as the process parameters used.

High surface requirements place greater demands on the tool, on the control of process parameters, and on the handling of the profiles during production. Lower productivity and the risk of increased scrapping mean that a high surface requirement will result in a more expensive product.

It is important that surface requirements and visible surface are stated on the production drawing. The markings used for this are:

Double-dotted and dashed line— – – — – – — – – —
Dashed line— — — — — — — —
Dotted line– – – – – – – – – – – –

Surface requirement can also be specified for unmarked surface.

  • The markings are used to describe surface requirements and / or visible surface area for a specified surface section
  • Unselected area, if not defined, can be considered to have a surface requirement 1 step lower than the lowest marked surface requirement.
  • Unmarked surface is usually not visible

Files to download: