Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of vibration aging and strain detection for workpiece

A vibration aging, workpiece technology, applied in vibration testing, testing of machine/structural components, 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, residual stress Issues such as release value and residual stress relief rate

Inactive Publication Date: 2006-01-25
汤小牛 +1
View PDF0 Cites 4 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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 the special circuit op-amp, identification and calculation. It is displayed on the mainframe of the vibration aging equipment, and the dynamic stress is calculated according to the stress-strain relationship. According to the dynamic stress value, the corresponding rotational speed can be selected to perform vibration aging on the workpiece. At the same time, the strain release during the vibration aging process is detected and the residual stress in the vibration aging process is converted. Finally, the strain release value caused by residual stress release is measured by drilling holes, and the residual stress value after vibration aging is converted, and then 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. 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, op amp circuit, etc. The control box controls the rotational speed of the vibration exciter connected to the workpiece to cause the workpiece to vibrate forcibly. At the same time, the control box detects the amplitude, phase, and an alternating motion of the dynamic strain of each path under each integer-valued excitation rotational speed. The average value in the cycle is the drift or strain release amount, and they and the exciting speed at t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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 machining industry, the vibration aging process is to control the speed of the vibration exciter connected to the workpiece through the control system of the vibration aging equipment to cause the workpiece to generate forced vibration, so that the dynamic stress and residual internal stress of the forced vibration of the workpiece are superimposed over a certain amount. 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 consists of control box, vibration exciter, acceleration (amplitude) sensor, fixture, rubber pad, cable, etc. [0005] Conve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02
Inventor 刘久明汤小牛
Owner 汤小牛