Online crack detection and position calibration method
A calibration method and crack technology, which is applied in the direction of measuring devices, processing detection response signals, and material analysis using acoustic wave emission technology, can solve problems such as inapplicable cladding layers and inapplicable online crack detection, and save time and cost , the effect of improving the detection efficiency
Inactive Publication Date: 2020-06-05
DALIAN UNIV OF TECH
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
But its disadvantage is that it is not suitable for the cladding layer of sudden cooling and sudden heating, and it is also not suitable for the online detection of cracks where the surface area of the material is constantly changing.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and technical solutions.
[0024] The matrix material used in this example is No. 45 steel, the powder material is Ni60, and the structural parameters of the matrix are 140×130×10mm. No. 1, No. 2 and No. 3 signal sensors 1, 2 and 3 are piezoelectric acceleration sensors, amplifier 4 is a charge amplifier, signal collector 5 is a data collector and signal display device 6 is a notebook computer. The specific steps of the method are as follows:
[0025] Step 1 Lap the laser cladding crack detection system;
[0026] Place No. 1, No. 2, and No. 3 piezoelectric acceleration sensors 1, 2, and 3 on the surface of the substrate 7 to be clad, and then connect the three piezoelectric acceleration sensors to the charge amplifier 4, Charge amplifier 4 is connected with data collector 5 again, and data collector 5 is connected on the notebook computer 6 at last, see figur...
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
Login to View More Abstract
The invention discloses an online crack detection and position calibration method, belongs to the technical field of laser cladding remanufacturing, and relates to a crack online detection and position calibration method. The method comprises the following steps: overlapping a laser cladding crack detection system by using a signal sensor, an amplifier, a signal collector and signal display equipment; establishing a rectangular plane coordinate system on the surface of the substrate; placing signal sensors on the coordinate origin and two coordinate axes respectively, and judging whether cracks are generated or not according to signal display equipment; if a vibration signal displayed by the signal display equipment has a large peak value, determining that the cladding layer has cracks, and recording the time for generating the large peak value; and establishing an equation set according to the recorded time and the propagation speed of the vibration signal in the matrix, and solving the coordinate position of the crack in the established coordinate system. According to the method, detection and position calibration of the cladding layer cracks in the laser cladding process are achieved, and the detection efficiency of the cladding layer cracks on the surface of the base body is improved.
Description
technical field [0001] The invention belongs to the technical field of laser cladding and remanufacturing, and relates to an online crack detection and position calibration method. Background technique [0002] When using laser cladding technology to repair mechanical parts, it is necessary to detect cracks in the cladding layer, and then deal with the cracks in the cladding layer according to the detection results. However, the commonly used crack detection methods mainly include magnetic particle flaw detection, penetrant coloring method and ultrasonic detection method. These crack detection methods are all off-line detection, and the crack detection of the cladding layer can only be carried out after the laser cladding process is completely completed, so the efficiency of crack detection is relatively low. In response to this problem, Zhang Xiaobo's patent "on-line detection device for cracks in laser cladding process", patent number CN108802198A, invented an online dete...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/14G01N29/44
CPCG01N29/14G01N29/44G01N29/4454G01N2291/011G01N2291/0289
Inventor 李涛李向波张元良石博文王东李凯强刘淑杰刘伟嵬张洪潮
Owner DALIAN UNIV OF TECH