A water immersion phased array ultrasonic testing method for aluminum alloy pre-stretched plates

A technology of pre-stretching plate and detection method, which is applied in the direction of using sound wave/ultrasonic wave/infrasonic wave to analyze solids, etc. It can solve the problems that the concentration and proficiency of the detection personnel are greatly affected, and achieve convenient calibration, improve detection efficiency, and operate convenient effect

Active Publication Date: 2018-01-16
广西南南铝加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is only suitable for manual ultrasonic flaw detection, which is greatly affected by the concentration and proficiency of the inspectors.

Method used

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  • A water immersion phased array ultrasonic testing method for aluminum alloy pre-stretched plates
  • A water immersion phased array ultrasonic testing method for aluminum alloy pre-stretched plates
  • A water immersion phased array ultrasonic testing method for aluminum alloy pre-stretched plates

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Experimental program
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Effect test

Embodiment 1

[0041] Detection method of the present invention, concrete steps are as follows:

[0042] (1) Prepare a phased array ultrasonic detector, the number of chips of the phased array ultrasonic probe is 256, the chip width is 0.6 mm, the chip spacing is 0.1 mm, the chip height is 10 mm, and the probe frequency is 10 MHz. Select a complete set of flat-bottomed hole test blocks with an aperture specification of Φ0.8mm, and select a large-thickness aluminum alloy pre-stretched plate as the plate to be tested. The alloy grade of the plate to be tested selected in this embodiment is 7075, the length is 483mm, and the width is . 457mm, thickness 159mm, there are flat-bottomed holes with diameters of Φ0.8mm and Φ1.2mm with different sound paths in the plate, the distribution diagram of the flat-bottomed holes in the plate is as follows figure 1 The location, sound path and equivalent diameter of each flat-bottomed hole are shown in Table 1.

[0043] Place the plate to be tested on the li...

Embodiment 2

[0057] The concrete steps of detection method of the present invention are as follows:

[0058] (1) Prepare a phased array ultrasonic detector, the number of chips of the phased array ultrasonic probe is 256, the chip width is 0.6 mm, the chip spacing is 0.1 mm, the chip height is 10 mm, and the probe frequency is 10 MHz. Select a complete set of flat-bottomed hole test blocks with an aperture specification of Φ0.8mm, and select a large-thickness aluminum alloy pre-stretched plate as the plate to be tested. The alloy grade of the plate to be tested selected in this embodiment is 7075, the length is 482.6mm, and the width is 304.8mm. mm, thickness 25.4mm. There are flat-bottomed holes with diameters of Φ0.8mm and Φ1.2mm with different sound paths in the plate to be tested. The distribution diagram of the flat-bottomed holes in the plate is as follows Figure 4 The location, sound path and equivalent diameter of each flat-bottomed hole are shown in Table 2.

[0059] Place the ...

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Abstract

The invention discloses a water immersion phased array ultrasonic detection method for an aluminum alloy pre-stretched plate, belonging to the technical field of aluminum alloy detection. The method includes the following steps: (1) placing the plate to be detected on the lifting platform of the phased array ultrasonic detector, and immersing it in water along with the lifting platform; (2) calling the distance-amplitude curve that meets the customer acceptance standard according to the thickness of the plate, and setting System parameters; (3) Use the upper surface of the test block to perform chip calibration and gain compensation on the chip of the phased array ultrasonic probe; (4) Use the flat-bottomed hole test block to perform distance-amplitude curve calibration; (5) Set according to the plate specification Scan the scope and perform ultrasonic scanning; (6) Evaluate the suspicious area, mark the defect location and issue a report; (7) Lift the plate above the water surface and dry it. The invention has the advantages of convenient detection and calibration, high testing efficiency and high accuracy, and provides a high-efficiency, high-repeatability and high-reproducibility non-destructive testing means for the quality assurance of aluminum alloy pre-stretched plates.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy detection, in particular to a water-immersion phased array ultrasonic detection method of an aluminum alloy pre-stretched plate. Background technique [0002] The aerospace industry requires a large amount of aluminum alloy pre-stretched sheets to manufacture various aerospace components. With the rapid development of national defense and aviation technology, the requirements for its internal quality inspection are becoming increasingly stringent. The internal quality control of the aluminum alloy pre-stretched plate produced in my country adopts ultrasonic contact non-destructive testing, but the disadvantage of ultrasonic contact method is that the work efficiency is low, the labor intensity of the flaw detection personnel is high, and the coupling pressure between the probe and the plate is very large due to human factors. Large differences lead to errors in discontinuity evaluation. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N29/06
Inventor 郑许陈翊翀彭斐何克准陈俊英
Owner 广西南南铝加工有限公司
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