A Laser Ultrasonic Determination Method of Weld Interface Structure and Its Application
An interface structure, laser ultrasonic technology, applied in the direction of material analysis by optical means, reduction of greenhouse gases, instruments, etc., can solve the problem of inability to take into account the accuracy of weld profile and workload, work efficiency, etc., to reduce the number of tests and Working time, good reliability, and the effect of improving detection efficiency
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Embodiment 1
[0054] like Figures 1 to 3 As shown, a laser ultrasonic determination method for the interface structure of a weld disclosed in this embodiment,
[0055] (1) The schematic diagram of the shape of the weld after the butt welding of the same metal and the feature point selection and coordinate information determination method for the detection of the interface structure feature are as follows: Figures 1 to 3 As shown, the weld structure is in a symmetrical distribution state; the feature points of the interface structure feature detection are the outer basic feature point 11, the inner basic feature point 7 and the necessary feature point 4 respectively;
[0056] Determine the connection position between the weld surface and the material matrix as the outer basic feature point 11, and define the outer basic feature point coordinates of the connection position between the weld surface and the material matrix on the left side of the longitudinal section of the weld as (0,0). Th...
Embodiment 2
[0066] like Figure 4 As shown, taking the quantitative measurement of the surface structure of the weld interface of a butt flat weld of the same metal of a stainless steel material as an example, and taking the longitudinal section of the weld perpendicular to the welding direction as the research object, it is proposed to determine that the weld is in the described Interface curve feature within a longitudinal section. Under the premise that the distance unit is defined as mm and the coordinate system is the Cartesian coordinate system, first, determine the first outer basic feature point 1 of the weld as a point at the junction of the weld and the stainless steel base, and define its coordinates (x, y) ) is (0,0); secondly, three times of vertically incident laser pulses are used to determine the coordinates of the first inner basic feature point 3 of the weld as (1, -1); The position of the intersection of the vertical line connecting the line between the first outer bas...
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