Short-sonic-path, ultrasonic and non-destructive probe for surface residual stress of large-curvature member

A technology of residual stress and components, which is applied in the direction of material analysis, force measurement, force/torque/power measuring instrument using sound wave/ultrasonic wave/infrasonic wave, and can solve the problem of single curvature of measurement surface, decrease of detection efficiency, subjective influence of movement accuracy, etc. question

Active Publication Date: 2016-08-03
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF9 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Compared with the already approved patent: "Ultrasonic detection and receiving device for residual stress of curved steel plate, application number: CN201110283060", the curvature of the measured curved surface is single, and it does not have the flexibility of measuring residual stress on curved surface components with varia...

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Short-sonic-path, ultrasonic and non-destructive probe for surface residual stress of large-curvature member
  • Short-sonic-path, ultrasonic and non-destructive probe for surface residual stress of large-curvature member
  • Short-sonic-path, ultrasonic and non-destructive probe for surface residual stress of large-curvature member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] The specific embodiment of the present invention is described in detail below:

[0012] figure 1 It is a schematic diagram of ultrasonic detection of blade surface residual stress, including plexiglass wedge 7 ( figure 2 ), capping ( image 3 ), ranging piezoelectric wafer 6, and detecting stress piezoelectric wafer 3.

[0013] When detecting residual stress on the surface of the detection component, the sensor must be fixed on the movable fixed frame through the thread on the cover, and then immersed in water. At the same time, the component to be detected is also immersed in water, and by effectively controlling the movable device, an appropriate distance between the sensor and the component to be detected is always maintained. Then the other two groups of piezoelectric chips sequentially excite ultrasonic waves to generate critical refracted longitudinal waves, and make the generated critical refracted longitudinal waves propagate in a small area of ​​the detecte...

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 invention relates to a device for the residual stress ultrasonic measurement of a member that is large in curvature and hard in coupled contact. The device comprises an organic glass wedge, a piezoelectric wafer and a sealing cover. A sensor device realizes the function of a pitch-catch structure and the function of a self-transmitting and self-receiving structure via the piezoelectric wafer. The sensor device is characterized by the short-sonic-path propagation of critically refracted longitudinal waves in a to-be-detected member and the detection function of measuring the spacing and detecting longitudinal and transverse residual stresses. The device is novel in design concept and wide in application prospect. Based on the structure of the device, the residual stress detection problem of members large in curvature and hard in coupled contact in the prior art can be well solved.

Description

1. Technical field [0001] The invention designs an ultrasonic detection probe suitable for the residual stress of components with large curvature and difficult coupling contact detection. The device can excite the critical refraction longitudinal wave in a non-contact way through water coupling and propagate in a short sound path in the component to be tested, so as to realize the detection of the residual stress in the small area near the surface of the complex component. It belongs to the field of non-destructive testing. 2. Background technology [0002] Residual stress is the stress retained after deformation due to the uneven stress field, strain field, temperature field and tissue inhomogeneity during metal processing. The existence of residual stress has a great influence on the reliability of mechanical components, especially on the fatigue life, dimensional stability and corrosion resistance of structural parts and can lead to stress concentration, which leads to m...

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
IPC IPC(8): G01L1/25G01L5/00G01N29/24
CPCG01L1/255G01L5/0047G01N29/2437
Inventor 徐春广李飞张翰明田海兵王俊峰吕卓
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap