Equipment & Infrastructure

Tribology & roughness

OCAS is equipped to assess both the short and long term tribological performance of a tool material – lubricant – sheet material combination.  We furthermore have expertise in 2D and 3D surface roughness measurement. The combination of 3D roughness measurements with tribology assessment provides a unique added value.

Flat die simulator

The sheet sample is pulled between two clamping dies. Traction and normal forces (Ft and Fn) are measured, allowing to calculate the mean friction coefficient f.

Translatory oscillation test

Assesses the long-term tribological performance by imposing a horizontal movement and a vertical load (constant, step or ramp) on the upper test specimen, whilst the lower specimen is fixed on a table. Friction force is measured. The frequency of the oscillating movement is adjustable to perform experiments at a given speed for controlled operating temperatures between 20 and 280°C.

Surface roughness

OCAS can measure 2D surface roughness parameters such as Ra, Rz, Rp, Rv, Rsk, RSm, RPc according to ISO 4287, using stylus or contact-free by means of Coherence Correlation Interferometry (CCI).

In addition, 3D surface roughness amplitude parameters Sa, Sz; functional parameters such as Sk, Spk as well as volume parameters Vmp, Vmc, etc. can be determined.