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Method of vibration aging and strain detection for workpiece

A vibration aging and workpiece technology, which is applied in vibration testing, machine/structural component testing, measuring devices, etc., can solve the problem of inability to directly detect dynamic strain amplitude and phase, dynamic strain release value, equivalent dynamic stress value, and residual stress Issues such as release value and residual stress relief rate

Inactive Publication Date: 2004-11-17
汤小牛 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a method for vibration aging and strain detection of workpieces, which can solve the existing problems in the prior art. The same vibration aging equipment cannot directly detect the dynamic strain amplitude, phase and dynamic strain of the processed workpiece. Release value, equivalent dynamic stress value, residual stress release value and residual stress elimination rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]First, on the basis of the same conventional vibration aging equipment, four channels for receiving dynamic strain signals are added. The strain gauges (flowers) can choose residual stress strain rosettes. The dynamic strain signals of each channel are stored or stored after being op-amped, identified and calculated by a special circuit. It is displayed on the host of the vibration aging equipment, and the dynamic stress is calculated according to the stress-strain relationship. The corresponding speed can be selected according to the dynamic stress value to perform vibration aging on the workpiece, and at the same time, the strain release during the vibration aging process is detected and the residual stress during the vibration aging process is converted. Finally, measure the strain release value caused by the release of residual stress by drilling holes and convert the residual stress value after vibration aging, and then convert the residual stress value before vibrati...

Embodiment 2

[0033] First of all, it is necessary to upgrade the CPU, memory and other hardware and related software of the control box of the same conventional vibration aging equipment, and then expand four channels controlled by the control box to receive dynamic strain signals, one of which is used for compensation, and the residual Stress strain flower, stick it on the target point of the workpiece, connect the signal to the dynamic strain channel, and then add the corresponding dynamic (static) strain detection circuit, phase detection circuit, filter circuit, operational amplifier circuit, etc., the vibration aging equipment The control box controls the rotational speed of the vibrator connected to the workpiece to cause the workpiece to generate forced vibration. At the same time, the control box detects the amplitude, phase and an alternating motion of each dynamic strain at each integer-valued excitation speed. The average value in the cycle is the drift or strain relief, and disp...

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PUM

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Abstract

The present invention discloses a method for vibration aging and strain detection for workpieces. There is involved a vibration aging equipment. After the vibration aging equipment is located by the workpiece to be treated, the exciter and the acceleration sensor in the vibration aging equipment are located respectively at the workpiece to be treated and are connected respectively to the control box in the vibration aging equipment through conducting wires, the strain sensor is positioned at the workpiece to be treated and is connected with the control box equipped with a strain detection and analysis circuit and of the vibration aging equipment through conducting wires, the control box directly detects the dynamic strain amplitude values, phase, strain detection drop-away values, equivalent dynamic stress values and residual stress drop-away values of the workpiece to be treated through the strain sensor. It can resolve the problems, existing in the prior art, that the same one vibration aging equipment is unable to directly detect the dynamic strain amplitude values, phase, strain detection drop-away values, equivalent dynamic stress values and residual stress drop-away values, and the like, of a workpiece to be treated.

Description

technical field [0001] The invention relates to the technical field of vibration aging and strain detection for mechanical workpieces. Background technique [0002] In the mechanical processing industry, the vibration aging process is to control the speed of the exciter connected to the workpiece through the control system of the vibration aging equipment to make the workpiece generate forced vibration, so that the dynamic stress and residual internal stress of the forced vibration of the workpiece are superimposed to exceed a certain value. Limit, in order to reduce or homogenize the residual stress inside the workpiece. [0003] According to the mechanism of vibration aging and the industry standard JB / T5926-91, one of the key parameters affecting the effect of vibration aging process is dynamic stress. [0004] Conventional vibration aging equipment is composed of control box, exciter, acceleration (amplitude) sensor, fixture, rubber pad, cable and so on. [0005] Conve...

Claims

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Application Information

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IPC IPC(8): G01M7/02
Inventor 刘久明汤小牛
Owner 汤小牛
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