Reduction of operator influence, reproducible test results and operation 24/7 - just a few of the benefits of automated materials testing. This is why aluminium manufacturer Aleris will also be using a Zwick robotic testing system in future. The system consists of two AllroundLine materials testing machines (Fmax 150kN and 30kN), a specimen magazine (maximum capacity 225 specimens) and a cross-section measuring device. Specimen handling is via a KUKA KR5arc industrial robot.
The system can be used for testing round and flat specimens of various dimensions. In addition to strain-rate-controlled tensile tests to ISO 6892-1, r+n values can also be calculated on the 30kN machine, with change in width measured by Zwick’s non-contact videoXtens extensometer.
Additionally, specimens can be elongated and replaced unbroken in the magazine by the robot for subsequent visual inspection of surface changes.
The system is equipped with a 4-transducer cross-section measuring device for precise, standard-compliant testing. Pairs of transducers provide differential measurement of thickness and width, at one or three locations on the specimen as required. Control of the system is via Zwick's 'autoEdition' automation software. The system is integrated into Aleris's company network, from which it receives parameter data and delivers results in return. The use of barcodes for specimen identification makes operation of the system very simple.