TESTING SERVO-MECHANICAL MACHINE FOR MECHANICAL TESTS OF MATERIAL SAMPLES FOR TENSION, COMPRESSION AND BENDING

摘要

FIELD: machine engineering.;SUBSTANCE: machine comprises a two-zone loading device comprising a base and a fixed traverse rigidly connected to each other by two smooth columns, the movable traverse is moved by means of servo motor and two worm-screw transmissions forming the tensile and compression zones, a force sensor fixed to the movable traverse from the side of the compression zone, two grips for fixing test samples in the tension zone: the upper one fastened in fixed traverse by two hinged units in a position coaxial with the axis of force application to test sample, and the lower one coupled with movable traverse through a force sensor, two supports for compression testing are installed in the compression zone, a displacement sensor, and including a pumping unit including a low-pressure pump, a high-pressure pump, low-pressure and high-pressure safety valves, distributors for controlling closure and opening of grippers, gauges for recording pressure in the low and high pressure lines. During the tension test, the lower grip coupled with the movable traverse through the force sensor by the hinge assembly is set to a position coaxial with the axis of force application to the sample, and when the sample is destroyed, the hinge connecting the force sensor to the lower grip is opened for releasing the force sensor from dynamic action of the lower grip weight, which receives the body of the movable traverse through a damping gasket.;EFFECT: providing alignment of force application to the sample with minimal accompanying bending and increasing the reliability of the force sensor.;2 cl, 1 dwg