MAKING OF INVARIABLE-CROSS-SECTION BEAM PURE BENDING AND DEVICE TO THIS END

摘要

FIELD: instrumentation.;SUBSTANCE: set of invention relates to metrology, particularly, to means for making of reference beam pure bending for strain gage testing. Device comprises bed with reference beam arranged thereat with strain measurement system, beam loading system with contact rollers and propulsor. Said bed is composed of strut with horizontal spacer bar secured thereat with cylindrical hinges fitted at its ends to make suspension pins for two vertical symmetric levers, their lower ends being articulated by opposed links with common differential "floating" propulsor. Four support rollers are arranged in pairs from above and from below of reference beam at top part of every lever. Flat pads with semi cylindrical ledges are arranged between rollers and reference beam, also from above and from below, to contact with reference beam directly in generating lines of cylindrical surfaces of said ledges. Points of contact of support rollers with flat side of said pads are located in pairs at appropriate perpendiculars to flat surface of the pads.;EFFECT: pure bending of beam, decreased straining forces, decreased weight and dimensions of test bench.;2 cl, 3 dwg