Experimental adjustment of the measuring modules of axial force monitoring gauge, taking into account the actual measurement ranges

The purpose of the presented work is to experimentally adjust the measuring modules of axial force monitoring gauge, taking into account their actual measurement ranges. Novosibirsk State Technical University has developed force monitoring gauge with elastic elements of two geometries: the «Flange» type and the «Collar» type. The elastic element of the «Flange» type is made of 50KHFA steel, and 36NHTU alloy was used for the geometry of the «Collar» type. Computational studies of the stress-strain state of elastic elements were carried out in the ANSYS WorkBench software package. The locations of strain gauges on elastic elements were selected according to these calculations. Compression tests of elastic elements were conducted on the basis of the static testing hall of the NSTU Research Institute of Materials and Structures. The equipment for testing was made of 30KHGSA grade steel. This equipment is placed between the grips of the Instron testing machine and allows to evenly distribute the applied compressive uniaxial load on the elastic element. At the first stage, loading tests of elastic elements with a measuring module for force control were carried out up to 110% (150%) of the upper limits of the measuring ranges of the gauge under consideration for geometries of the «Collar» type («Flange» type) accordingly. At the second stage, the elastic elements were loaded stepwise within the measurement range. The obtained data is presented in graphs illustrating the improvement in the readings of the measuring module after its training. The results can be used in further studies of elastic elements of the typical geometry of gauge for monitoring axial forces of other loading intervals.

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