Vibratory stress relief apparatus for medium frequency and low frequency shaft type parts, and use method thereof

Abstract

The invention relates to a vibratory stress relief apparatus for medium frequency and low frequency shaft type parts, and a use method thereof. The apparatus comprises a vibration exciter, a support block for clamping and supporting a workpiece, and a support mechanism connected with the support block. The support mechanism comprises a pair of support frames comprising a left support frame and a right support frame, and a support seat for installing the left support frame and the right support frame, wherein the left support frame and the right support frame right are arranged relatively. Thesupport block respectively forms rotatable connections with the left support frame of the support mechanism and the right support frame of the support mechanism. The apparatus further comprises a vibration exciter base for installing the vibration exciter, wherein the vibration exciter base is arranged on the middle portion of the workpiece, the vibration exciter, the vibration exciter base and the workpiece synchronously vibrate during vibratory stress relief. According to the present invention, a simply supported beam form is adopted, the flexural vibration type primary resonance is generated by the shaft type parts under the excitation of the vibration exciter at the natural frequency adopted for shaft flexural vibration; in the prior art, the dynamic stress generated by the apparatus does not reach the requirement of residual stress decreasing, with the apparatus provided by the present invention, the problem in the prior art is solved; the deformation amounts on both ends of the shaft are substantially improved; the dynamic stress distribution of the shaft is uniform so as to effectively reduce the residual stress of the shaft part.

Description

technical field [0001] The invention relates to a vibration aging device, in particular to a vibration aging device for shaft parts used for reducing the residual stress of middle and low frequency shaft parts whose bending vibration natural frequency is less than 200HZ. Background technique [0002] Vibration aging technology is a method to eliminate the residual stress inside the workpiece. Through vibration, when the superposition of the residual stress inside the workpiece and the dynamic stress generated by vibration reaches or exceeds the yield strength of the material, the material undergoes a small amount of plastic deformation, so that the material The internal stress can be relaxed and relieved. Compared with thermal aging, vibration aging has the advantages of less investment, quick effect, low operating cost and environmental protection. Therefore, the high technology of vibration aging has broad application prospects. [0003] However, many current vibration a...

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Problems solved by technology

Therefore, regardless of whether it deals with low frequency or high frequency, the excitation frequency is carried out according to the natural frequency of the system. The excitation frequency is actually lower than the natural frequency of bending vibration of the roll itself, so that the roll cannot obtain enough dynamic stress to eliminate its internal vibration. Residual Stress

[0004] In short, the effect of the current vibration aging device for shaft parts is poor, and it is difficult to achieve the expected effect of reducing residual stress

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