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VERFAHREN UND VORRICHTUNG ZUR TEMPERATURPRÜFUNG BEI EINEM VERFAHREN DER GENERATIVEN FERTIGUNG
VERFAHREN UND VORRICHTUNG ZUR TEMPERATURPRÜFUNG BEI EINEM VERFAHREN DER GENERATIVEN FERTIGUNG
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摘要
The present invention concerns a method for inspecting the temperature during an additive manufacture of a part by powder bed fusion in an additive manufacturing system, the fusion being obtained by scanning an activation source over the powder bed, the method comprising the steps of: - producing at least one ultrasound wave guide, layer by layer, simultaneously to the manufacture, on a construction tray, of at least one part in the powder bed, said at least one wave guide being secured to the construction tray and having a minimum value of the smallest dimension of the cross-section greater than the ratio "c/f", "c" denoting the speed of propagation of the ultrasound wave in the controlled material and "f" the main frequency of the ultrasound wave; - for a layer 'n': - measuring a time of flight for an ultrasonic beam emitted in combined transmitter-receiver mode in said at least one wave guide; - obtaining, by simulation, a value of the propagation of an ultrasonic beam in a temperature field, the simulation being based on a model representative of the additive manufacturing system for said layer 'n'; - comparing the measurement of the time of flight in said at least one wave guide to the propagation value obtained by simulation; - updating the simulation model depending on the result of the comparison; - repeating the preceding steps; and - generating an estimation of the temperature field prevailing in said at least one wave guide from the result of the comparisons.
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