A miniature non-backlash transmission fatigue testing machine

Abstract

The invention belongs to the field of testing of mechanical properties of materials and discloses a micro gap-free transmission type fatigue testing machine. The fatigue testing machine comprises a machine body as well as a symmetric loading unit, a clamping unit, a signal detection unit and a limit protection device which are arranged in the machine body; the symmetric loading unit comprises a servo motor, synchronous wheel synchronous belts, left-hand and right-hand two-way ball screws, left and right cross beams and two nut locking structures, the clamping unit comprises a left clamp and a right clamp, the signal detection unit comprises a micro displacement sensor and a micro load sensor, and the limit protection device comprises a magnetic switch and a magnet. The fatigue testing machine is small in size, compact in structure, gap-free, high in detection accuracy and capable of being mounted on various microstructure observation instruments such as an electron microscope, an atomic force microscope, X-ray, neutron diffraction and scanning electron microscopes and the like to deeply analyze the mechanical performance of materials.

Description

technical field [0001] The invention belongs to the field of testing mechanical properties of materials, and in particular relates to a fatigue testing machine. Background technique [0002] At present, in the process of testing the mechanical properties of materials, not only the macroscopic observation of the sample is carried out, but more and more microstructure observation instruments such as electron microscopes, atomic force microscopes, X-rays, neutron diffraction and scanning electron microscopes are used to detect the occurrence of materials. The whole process of microscopic deformation, damage and failure is monitored dynamically. Due to the small size of the cavity of the above-mentioned instruments, most of them are in a vacuum environment, and there are strict requirements on the weight of the testing machine, while the uniaxial tension-compression fatigue testing machine is mostly realized by hydraulic system or gear transmission, which has the characteristics...

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Problems solved by technology

Due to the small size of the cavity of the above-mentioned instruments, most of them are in a vacuum environment, and there are strict requirements on the weight of the testing machine, while the uniaxial tension-compression fatigue testing machine is mostly realized by hydraulic system or gear transmission, which has the characteristics of high heat generation, large volume and redundant structure. It is difficult to be compatible with the above-mentioned instruments and cannot meet the mechanical performance test requirements of various new materials such as microelectronic materials and polymer materials.

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