Six-degree-of-freedom vibratory stress relief device

Abstract

The invention relates to a six-degree-of-freedom vibratory stress relief device. The device comprises six exciting branch chains, a movable platform and a stand, wherein the upper ends of the six exciting branch chains are connected with the movable platform through a second spherical pair, a fourth spherical pair, a sixth spherical pair, an eighth spherical pair, a tenth spherical pair and a twelfth spherical pair respectively, and the lower ends of the six exciting branch chains are connected with the stand through a first spherical pair, a third spherical pair, a fifth spherical pair, a seventh spherical pair, a ninth spherical pair and an eleventh spherical pair respectively; and the movable platform is used for mounting various workpieces for vibratory stress relief treatment. Through joint excitation of six exciters, the movable platform can produce spatial six-degree-of-freedom vibration, so that the workpieces can be excited to produce resonance of various frequencies and vibration modes, which comprises non-linear vibration such as combined resonance, subharmonic resonance, multiple resonance and the like; thus sufficient stress strain can be produced at each position inside the workpieces to effectively eliminate residual stress of the workpieces and obviously improve the vibratory stress relief effect.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a six-degree-of-freedom vibration aging device. Background technique [0002] Vibration aging treatment is a method commonly used in engineering materials to eliminate their internal residual internal stress. Its mechanism is to apply a dynamic stress to the workpiece through vibration. When the dynamic stress is superimposed with the residual stress of the workpiece itself, it reaches or exceeds the At the microscopic yield limit, the workpiece will undergo microscopic or macroscopic local and overall elastic-plastic deformation, and at the same time reduce and homogenize the residual stress inside the workpiece, and finally achieve the purpose of preventing deformation and cracking of the workpiece and stabilizing the size and geometric accuracy of the workpiece. The existing vibration aging device is single-degree-of-freedom, which utilizes an exciter to vibrate to cause a...

AI Technical Summary

Problems solved by technology

This type of vibration aging device can only vibrate in a certain direction, and it is difficult to generate resonance of many vibration modes of the workpiece, let alone excite the resonance of each vibration mode of the workpiece in all directions in space, so it is difficult to generate sufficient dynamic stress on the workpiece. The vibration effect is limited, especially for large or complex structural components, it is difficult to eliminate the residual stress, which is an important reason why the vibration aging process has not been widely used

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