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- W2018553610 abstract "This contribution presents a new optical system, which allows real-time distortion measurement of weld-pieces on a laser welding machine. The system is based on simultaneous displacement measurement of several thousand points on a weld-piece surface employing rapid (non-scanning) laser profilometry. Weld-piece is illuminated by laser light, structured into multiple light planes and imaged by a digital camera. The position of the optical measuring system is fixed relative to the measured weld-piece. Acquired image is fed into a personal computer where it is processed to obtain the three-dimensional (3D) shape of imaged weld-piece surface. The maximum real-time measurement rate of the presented system is up to 20 surface measurements per second. We have applied the set-up to study the distortion of low-carbon thin steel sheet samples during Nd:YAG laser welding. In this paper we present characteristic evolution of surface distortion and distortion of the welding edges as a function of time. The produced weld-pieces exhibit characteristic V-shaped angular distortion mixed with longitudinal distortion, which bends down the welding edges at the end of weld. In welding edge distortion study we found out that the weld tends to annihilate vertical misalignment. The results show that the developed optical system allows fast and accurate temporally and spatially resolved evaluation of various types of weld-piece distortion. The presented system is scalable - the size of the measurement area can be adapted to the size of weld-piece." @default.
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- W2018553610 date "2006-04-21" @default.
- W2018553610 modified "2023-09-26" @default.
- W2018553610 title "Optical system for weld-piece distortion measurement during pulsed laser welding" @default.
- W2018553610 doi "https://doi.org/10.1117/12.662911" @default.
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