Aluminum Extrusion Troubleshooting

Poor die welds

Problem Description

Internal welds are weak or incomplete, leading to reduced mechanical integrity.

Cause–Correction Mapping
  • Excess lubricants
    Cause in: Equipment

      Corrections

    • Use less lubrication on die/billet and keep shear free of grease and oil.

  • Improper feed
    Cause in: Die

      Corrections

    • Increase volume/feed in weld chambers.

      Advantage: Increase in production, welds; proper and lower scrap rate.

    • Restrict feed in non-welding area; inspect bearing surface for presence and add restriction to flow as required.

Please note that the information provided in this article is intended to be a general guide to the causes and corrections of Poor die welds 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.