A horizontal linear motor driven medium and high frequency fatigue testing machine

Abstract

The invention relates to a medium-high-frequency fatigue testing machine driven by a horizontal linear motor. The medium-high-frequency fatigue testing machine comprises the linear motor, a force sensor, a sensor seat, supports, a clamp device, a bottom plate, mounting feet, damping foot pads and the like and is characterized in that the force sensor and the linear motor are respectively fixed atthe left and right ends of the bottom plate, the force sensor is connected with the bottom plate through the sensor seat, and a sensor support with a built-in linear bearing is arranged at a connecting rod between the force sensor end and a clamp; a front support with a built-in linear bearing and a rear support with a built-in linear bearing are arranged in the front and at the rear of a linear motor rotor connecting rod; the bottom plate is mounted on a special table board through mounting angles, and the damping foot pads are arranged between the mounting angles and the table board to absorb vibration. The medium-high-frequency fatigue testing machine is used for the static and dynamic medium-load high-frequency fatigued testing of various samples, multiple linear bearing supports are used, linear motor rotor motion stability is increased, the centering performance of the testing machine is increased, and reliable and efficient equipment is provided for the high-precision material high-frequency fatigue testing.

Description

technical field [0001] The invention relates to a high-frequency fatigue testing machine driven by a horizontal linear motor, in particular to a fatigue testing machine for medium-high frequency cyclic load and high-precision high-load loading, and belongs to the technical field of medium-high frequency fatigue testing devices. Background technique [0002] To study the fatigue of materials and structures, fatigue testing is an indispensable research basis. Parts or materials are prone to fatigue damage under the action of external alternating loads. During this process, tiny cracks on the surface gradually expand. After a period of cyclic loading, parts will undergo fatigue damage. [0003] At present, there are electronic universal testing machines, electro-hydraulic servo fatigue testing machines and dynamic thermomechanical analyzers available at home and abroad for fatigue testing. The maximum load of the electronic universal testing machine is large, but the loading r...

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Problems solved by technology

The maximum load of the electronic universal testing machine is large, but the loading rate is slow, and the loading frequency that can be realized is very low. It is difficult to undertake the fatigue test that the number of loading cycles reaches a certain order of magnitude.

The maximum load of the electro-hydraulic servo fatigue testing machine is also very large, and the loading rate is high, but the loading frequency is not high enough in the face of high-cycle fatigue, and the system is complex, occupying an area, and the noise is large; although the dynamic thermomechanical analyzer can achieve high Loading frequency, but the maximum load is small, and only the fatigue of micro-sized samples can be studied

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