A thin-walled tube compression-bending-expansion integrated test device and method

Abstract

The invention discloses a thin-walled tube bending and stretching integrated test device and method, which relate to the field of mechanical engineering technology testing, including a flattening mechanism, a bending mechanism, and a sensor; the flattening mechanism includes a pressing plate, a bearing plate, a screw mechanism, A transmission mechanism, the transmission mechanism is fixedly installed on the right side of the bearing plate, and the pressing plate is movably installed on the left side of the bearing plate through the screw mechanism; the number of the crushing mechanisms is greater than or equal to 2, corresponding The bending mechanism is respectively provided at the upper end and the lower end between the two crushing mechanisms; the bending mechanism includes a first connecting plate, a second connecting plate, a rotating shaft, and a bending transmission mechanism; the sensor includes a pressure sensor, torque sensor. The integrated test device of the present invention has simple structure, convenient use and maintenance, and can realize continuous tests of flattening, bending, folding and unfolding of large-diameter thin-walled pod rods and thin-walled round tubes, and record the mechanical state parameters during the whole test process .

Description

technical field [0001] The invention relates to the field of mechanical engineering technology tests, in particular to an integrated test device and method for compression, bending and expansion of thin-walled pipes. Background technique [0002] The space deployable structure is a structural system widely used in large spacecraft. Traditionally, mechanical hinge systems are mostly used. Mechanical hinge systems are mainly driven by motors. However, the disadvantages of mechanical hinge systems are complex mechanisms, heavy weight, and low deployment reliability. With the development of material science and technology, the space expandable structure based on the integration of material mechanism and structure has become a research hotspot and development trend. Using high-performance composite materials, through the elasticity or shape memory of the material, the material is folded on the ground and launched into orbit. Release elastic energy or store energy in thermal memor...

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Problems solved by technology

[0005] The above-mentioned prior art discloses that for small-sized test pieces that need to be bent with small deformation, it can be realized by using a four-point bending testing machine; for thin sheets, thin rods, etc., that need to be bent with large deformation, it can be realized by designing tooling Or it can be realized by combining tooling with a testing machine, but the technology for continuous flattening and bending of workpieces with complex geometrical sections and large scales, and recording process data has not yet been disclosed

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