Ultrasonic phased array test block for crankshaft detection
An ultrasonic phased array and phased array technology, which is used in material analysis, measurement devices, and instruments using sonic/ultrasonic/infrasonic waves, can solve problems such as large ultrasonic attenuation, complex structure, and difficult adjustment, and achieve elimination of sensitivity Error, reasonable structure, easy to carry effect
Inactive Publication Date: 2015-10-28
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology
Usually, the diameter of the crankshaft journal is large, the ultrasonic attenuation is large, and its structure is relatively complicated, which makes routine detection more difficult
The ultrasonic phased array uses electronic technology to control the scanning direction and focus depth of the sound beam. It can realize the same probe to detect different wall thicknesses, different materials, and different shapes of workpieces. It overcomes the conventional multi-probe automatic ultrasonic detection. Disadvantages of difficulty in system adjustment and narrow adaptability range of probes
The fast and effective detection of internal defects of the crankshaft can be realized by adding matching wedges to the ultrasonic phased array; however, there is currently no ready-made crankshaft phased array calibration test block, which is used to calibrate and determine the sensitivity of the detection of internal defects of the crankshaft. The invention provides a phased array test block for detecting internal defects of the crankshaft
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[0010] refer to figure 1 , 2 3. The top surface of the calibration test block is an arc surface with curvature. According to the common crankshaft journal diameter in the market, the curvature radius of the top surface of the test block is 40mm, the length of the test block is 300mm, the thickness is 40mm, and the height is 100mm; The bottom surface of the block is flat, and the front end of the test block is an arc surface 1 with a radius of 100 mm; seven horizontal through holes 2 with a diameter of 2 mm are processed on the body of the test block, four of which are located on the left side of the test block and along the Arranged in the depth direction, the other three horizontal through holes are located on the right side of the test block; a step 4, length 40mm, height 30mm, the step transition is a smooth transition area with a radius of 5mm; 4 grooves 3 of different depths, 1# groove Located at the step transition, the angle with the step plane is 45°, the groove width...
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Abstract
The invention discloses an ultrasonic phased array test block for crankshaft detection. The test block is characterized in that it is made according to the material and curvature of a to-be-detected crankshaft. The test block includes an arc surface, a step, 7 transverse through-holes at different positions and 4 cutting grooves of different depths. The sound velocity, delay and ACG are calibrated by the arc surface of the test block, the flaw detection sensitivity of the instrument is adjusted according to the transverse through-holes and can be taken as an equivalent to compare. As the invention adopts the detection surface identical to a workpiece, the circumstance of defective coupling of phased array flaw detection is eliminated. The test block provided by the invention can solve the problems of fast calibration and detection sensitivity determination in conventional vehicle crankshaft phased array detection.
Description
technical field [0001] The invention relates to an ultrasonic flaw detection test block, in particular to an ultrasonic phased array test block for crankshaft detection. Background technique [0002] The crankshaft is the main moving part of the engine, which is subject to complex alternating loads and impacts, and is prone to fatigue cracks. Usually, the diameter of the crankshaft journal is large, the ultrasonic attenuation is large, and its structure is relatively complicated, which makes routine detection more difficult. The ultrasonic phased array uses electronic technology to control the scanning direction and focus depth of the sound beam. It can realize the same probe to detect different wall thicknesses, different materials, and different shapes of workpieces. It overcomes the conventional multi-probe automatic ultrasonic detection. The disadvantages are that it is difficult to adjust the system and the adaptability range of the probe is narrow. The fast and effec...
Claims
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IPC IPC(8): G01N29/30
Inventor 邓勇
Owner NANCHANG HANGKONG UNIVERSITY