Frequency self-adaptive oscillation time-effect method and device

Abstract

The invention provides a vibratory stress relief (VSR) method and device with adaptive frequency, wherein, an acceleration sensor collects information on acceleration change and inputs that into a controller, which outputs controlling signals so that the vibratory frequency of a vibration exciter changes, till the optimal resonance frequency is obtained. The invention comprises an acceleration sensor, an electric charge converting circuit, an amplifying circuit, a low-pass filter circuit, a voltage amplifying circuit, a detection circuit, a controller, a speed-regulating circuit and a vibration exciter. The invention is of a simple process method, is easy to operate, with simple and reasonable structure, can efficiently improve the VSR efficiency, track just in time the change in resonance frequency, improve effectively VSR effect, can substitute prior VSR method, and is especially suitable for relieving inner stress of thick sheets, and is suitable for industrialized application.

Description

technical field [0001] The invention relates to a vibration aging method and device, in particular to a frequency adaptive vibration aging method and device. Background technique [0002] Vibration aging is to apply additional stress to the workpiece in the form of forced vibration at its natural frequency, and perform excitation for several minutes to tens of minutes. When the superposition of the additional dynamic stress and the residual stress reaches or exceeds the yield limit of the material, the workpiece undergoes microscopic Or macroscopic plastic deformation, thereby reducing and homogenizing the residual stress of the workpiece, and stabilizing its dimensional accuracy. [0003] In the existing vibration aging equipment, a traditional vibration aging treatment method is generally adopted: the resonance frequency of the workpiece is determined by full or partial frequency sweep, and then the vibration is excited at the sub-resonance frequency for 10-45 minutes to a...

AI Technical Summary

Problems solved by technology

[0005] 1. Carry out full or partial frequency sweep on the workpiece, which takes a long time and low efficiency

[0006] 2. The resonance frequency of the workpiece will change during the aging process. Even if the resonance frequency shifts to a small value, the workpiece may not reach resonance, which will reduce the aging efficiency of the workpiece and cause energy waste

[0007] 3. The mechanical vibration box and the motor are directly and rigidly connected together. During the aging process, they will vibrate violently with the workpiece, which seriously affects the working state and service life of the motor.

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