You know that your parts require some kind of non-destructive inspection, but when this test method is applied, the health of your steel rope and traction cable, our EUROLAB technicians will provide an explanation of the advantages and limitations of each NDT method we use together.
Elevator Cable Car Ultrasonic Inspection With Steel Wire Rope Test
Wire rope testing is a form of electromagnetic inspection using equipment specifically designed for steel braided wire rope. Steel rope is used in various applications such as amusement parks, mine shafts, suspended bridges and overhead cranes.
The equipment uses two powerful magnets of a clam shell type arranged to be clamped around the rope. These magnets create a constant magnetic field in the steel rope. Since the magnetic field is constant, the amount of flux required to feed the rope is a function of the cross-sectional area of ​​the rope.
If the cross-section of the rope passing through the machine contains defects such as broken wires, corrosion thinning or stretching, the magnetic flux will be affected. These changes are interpreted on an oscilloscope screen.
With proper calibration and training, the technician can determine the percentage of cross-sectional loss, fracture wires and overall breaking strength.
Tensile Test for Submarine Cables
The EUROLAB imitator does not measure the cable until failure, but to measure how the conductivity of the fiber optics in the cable changes under different axial loads. The 41 meter-long machine bed offers the possibility to test submarine cables up to 40 meter length, based on flexible articulated supports with adjustable counter bearing. If necessary, the test machine can be extended with a baffle pulley to allow testing of cables up to 80 meters. A movable carrier on the test stand additionally allows deflection tests to simulate the bending of the cable at different points.
Steel Rope Hardness Test
The hardness test of the wires is carried out not only on the surface, but also on the core. For the hardness test of the core, the cross section of the wire is ground and the hardness values ​​are mainly determined according to (TS EN ISO 6507-1). The wires are rolled and the smaller diameter wires are drawn. The material undergoes a hardening and a change in grain geometry. The elongated metallographic components develop on cold drawn wires that can be tested effectively to Knoop (TS EN ISO 4545-1). The hardness test methods used herein are performed using EUROLAB hardness testers for low load Rockwell hardness test and micro Rockwell hardness test.
Rotary Bar Bending Fatigue Test
In many applications, the wires are subjected to various cyclic stresses. Fatigue strength can be determined quickly and easily in rotary bar bending fatigue tests where the rapidly rotating sample (up to 6000 rpm) is additionally loaded with a force perpendicular to the axis of rotation. This bending plus rotation provides the tensile-compression loading of the sample surface. Sample preparation is particularly important here, an undamaged surface is essential.