Press-bending and expanding integrated test device for thin walled tube and method

Abstract

The invention discloses a press-bending and expanding integrated test device for a thin walled tube and a method, which relates to the field of testing of a mechanical engineering technology. The device includes flattening mechanisms, bending mechanisms, and sensors; each of the flattening mechanisms includes a pressing plate, a carrier plate, screw rod mechanisms, and transmission mechanisms, thetransmission mechanisms are fixedly installed on the right side of the carrier plate, and the pressing plate is movably installed on the left side of the carrier plate through the screw rod mechanisms; the number of the flattening mechanisms is greater than or equal to 2, and upper and lower ends between the two adjacent flattening mechanisms are respectively provided with the bending mechanisms;each of the bending mechanism includes a first connection plate, a second connection plate, a rotating shaft, and a bending transmission mechanism; and the sensors include a pressure sensor and a torque sensor. The integrated test device of the invention is simple in structure, is convenient to use and maintain, can achieve a continuous test for flattening, bending, folding and unfolding large-diameter thin-walled bean pods and thin-walled round tubes, and records mechanical state parameters during a 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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