DEVICE FOR TESTING SAMPLES FOR low-cycle fatigue in pure bending

摘要

The invention relates to test equipment, in particular to devices for testing flat samples to low-cycle fatigue in pure bending.; The object of the claimed utility model is to increase the accuracy of the test samples in pure bending.; Technical result is achieved by the fact that in the proposed device for testing samples for low-cycle fatigue in pure bending, comprising a frame with a support for the linkage system, an asynchronous AC motor, worm gear, crank, connecting rod, slide two clamping, both ends of the specimen to avoid the efforts of compression or tension mounted in rolling bearings and at the ends of the displacement is limited by stops, also provided a control cabinet with a built-in automatic cycle counter and the system vtomaticheskogo disconnecting device after the destruction of the sample.; Device for low-cycle fatigue testing samples in pure bending operates as follows. The apparatus is provided in the neutral position, the specimen is installed by bolting in two rolling bearings. Rolling bearing consists of a lower and upper pressing. On the upper surface of the bottom nip and on the bottom surface of the upper clamp are rollers mounted on the axes, i.e. both ends of the specimen to avoid compression forces or tensile set in rolling bearings and the ends are limited against displacement by stops provided on the upper and lower rams . AC induction motor through belt transmission and a worm gear drives a crank mechanism the connecting rod and the slide. The slider drives the traction pivotally connected with clamps. Clamps rotate and create a bend in the sample. The design provides a symmetrical arrangement of the clamps and symmetrical load application. High rigidity, the symmetry of loading, automatic cycle counter and automatic shutdown devices after sample fracture can improve the accuracy of the test.; The proposed model provides a useful achieving said technical result, namely improving the accuracy of the test samples in pure bending.