Ultrasonic-wave stress detection device capable of adjusting acoustic beam angle and test area

A test area and stress detection technology, applied in the direction of measuring force, measuring device, instrument, etc., can solve the problems of non-perpendicular direction, large test error, inconsistent position, etc., to improve work efficiency, reduce production cost and processing cycle, improve The effect of detection accuracy

CN105300578AActive Publication Date: 2016-02-03SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-02-03

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Abstract

Provided is an ultrasonic-wave stress detection device capable of adjusting an acoustic beam angle and a test area. The detection device comprises a center positioning bench (100). Parallel guide rail racks (200) are fixed on opposite side faces of the center positioning bench (100) and are slidably connected with a glass pedestal (300). A U-type groove rail (310) with a protruding arc guide rail face (311) is arranged on the upper part of the glass pedestal (300). A probe fixing wedge (400) is slidably connected with the side wall of the U-type groove rail (310). The recessed arc face of the probe fixing wedge (400) cooperates with the protruding arc guide rail face (311) of the U-type groove rail (310). A probe fixing cavity (500) used for fixing an ultrasonic-wave probe is arranged on the upper part of the probe fixing cavity (500). According to the invention, adjustment and correction of first critical angles of a welded seam and of a heat affected zone and residual stress tests for different kinds of materials can be achieved; and residual stress tests of to-be-tested workpieces in different areas of regions can be achieved.
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Description

technical field

[0001] The invention relates to an ultrasonic stress detection device capable of adjusting the sound beam angle and the testing area, and belongs to the field of residual stress testing. Background technique

[0002] Residual stress is generated when the material undergoes plastic deformation under the action of external force, while elastic deformation does not generate residual stress. Residual stress is a main criterion for workpiece quality evaluation, which has great harm to the service of the workpiece, such as accelerating the initiation of fatigue cracks, reducing fatigue life, stress corrosion, deformation, instability, etc., so the significance of nondestructive testing for residual stress is relatively large big.

[0003] Ultrasound uses the principle of acoustoelasticity to test the residual stress. The principle of acoustoelasticity refers to the linear relationship between the propagation speed of ultrasonic waves and the stress in the workpiec...

Examples

Embodiment 1

[0039] figure 1 , figure 2It is shown that a specific embodiment of the present invention is an ultrasonic stress detection device with adjustable sound beam angle and test area, including: a central positioning platform 100; parallel guide rail frames are fixed on the opposite sides of the central positioning platform 100 200, a pair of parallel rail frames 200 fixed on the opposite sides of the central positioning platform 100 are on the same axis; each of the parallel rail frames 200 is slidably connected to a glass base 300, and the upper part of the glass base 300 has a convex circle The U-shaped groove rail 310 of the arc guide surface 311, the probe fixing wedge 400 is slidably connected with the side wall of the U-shaped groove rail 310, and the concave arc surface of the probe fixing wedge 400 is connected with the convex circle of the U-shaped groove rail 310 The arc guide rail surface 311 cooperates; the probe fixing wedge 400 is provided with a probe fixing cavit...

Embodiment 2

[0047] image 3 , Figure 4 It is shown that another specific embodiment of the present invention is an ultrasonic stress detection device that can adjust the beam angle and the test area, including: a central positioning platform 100; parallel guide rails are fixed on the opposite sides of the central positioning platform 100 Frame 200, a pair of parallel rail frames 200 fixed on the opposite sides of the central positioning platform 100 are on the same axis; each parallel rail frame 200 is slidably connected with a glass base 300, and the upper part of the glass base 300 has a convex The U-shaped groove rail 310 of the arc guide rail surface 311, the probe fixing wedge 400 is slidably connected with the side wall of the U-shaped groove rail 310, and the concave arc surface of the probe fixing wedge 400 is connected with the convex surface of the U-shaped groove rail 310. The arc guide rail surface 311 cooperates; the probe fixing wedge 400 is provided with a probe fixing ca...