Aluminum Extrusion Troubleshooting

Dip on flat surface

Problem Description

A localized depression forms on an otherwise flat surface of the extrusion.

Cause–Correction Mapping
  • Bearing transitions too abrupt
    Cause in: Die

      Corrections

    • Adjust transition via milling/grinding.

      Advantage: Better material.

    • File relief on long bearing at transition, choke the short bearing.

      Disadvantage: Shorten die life.

    • Redesign die.

Please note that the information provided in this article is intended to be a general guide to the causes and corrections of Dip on flat surface in aluminum extrusion. However, it is important to note that the specific cause and correction of any particular defect will vary depending on the specific extrusion process, alloy, and other factors. Therefore, it is important to consult with an experienced and professional engineer to ensure that the correct diagnosis is made and the most suitable correction is chosen.