– Quality control –

A standardised quality control procedure is the foundation for a continuously reliable production process from the delivery of raw materials to the fully assembled component. The applied quality control methods are always in line with current standards. Customer-specific quality control methods can also be implemented upon request.

Quality control for casting

Chemical composition analyses are carried out on the liquid alloy and the finished billet to ensure that the requirements of the alloy standard are met. The analysis parameters are based on the material standards related to the alloy in question with regard to the composition of the ingredients and the defined range.

A macro and micro analysis of the external and internal billet structure is carried out according to EN 486 and provides information about deposits, porosities, inclusions and grain sizes. These quality characteristics are key criteria for further processing in the press shop and indicators for the strength of the material.

We also have the capacities to inspect the billets for inclusions (cavities) and cracks using ultrasound. The inspection is carried out manually or automatically in a water bath in strict compliance with the specifications of the ASTM standard (American Society for Testing and Materials). The inspection personnel are qualified according to NAS 410 (Standard for Personnel Qualification in Ultrasound).

Quality control for extrusion

The dimensional inspection of our high-precision aluminium profiles and tubes is carried out with a 2D measuring machine by ASCONDA, the high-end manufacturer of optical measuring machines for dimensions. The system is insensitive to dirt, vibrations or temperatures. The measurement is completed in a few seconds. That makes immediate correction of the press parameters uncomplicated and quick. ASCONDA enables significant changes to be recognised and corrected immediately.

Additional procedures are available for quality control of the extrudates

  • Inspection of the shape tolerance (straightness, torsion) as well as the mechanical properties through a tensile test (MTS Systems, Zwick-Röll)
  • Testing of surface roughness (axial and radial)
  • Macro tests to determine the press waste
  • Manual visual inspection of the surface

Quality control for processing

Depending on quality and customer requirements, various automated and manual measuring and testing options are available:

  • 3D coordinate measuring machines
  • Camera and sensor inspection in the assembly unit ensure that all components are present and have been assembled according to specification.
  • Screw connections and rivets are already checked directly during assembly (torque, rotation angle, etc.).
  • Checks of welded joints (macro- and microsections)
  • Inspection of surface cleanliness according to specification
  • Roughness tests
  • Leak tests