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Trajectoires de numérisation adaptatives en contexte in-situ

Abstract : In the context of the inspection of the machining process, the integration of the measurement operations into the manufacturing process allows to realize the corrective actions applied to the manufacturing operations and thus to reduce the manufacturing cycle time. Our objective in this work is to realize an on-machine measurement (OMM) by laser plane sensor in a 5-axis machine-tool. The problem related to OMM concerns the proposition of a scan path planning method that results from a compromise between the measurement time and the quality of the data acquired.First of all, we propose a description format of the parameters of the sensor path allowing to integrate the orientation of the spindle in the machine. As the determination of view point in our context is adopted for the laser plane sensor, the visibility and quality constraints are applied to the digitizing laser line position on the surface. We propose to realize a simulator of digitizing path. This simulator allows us to identify correctly the areas of the digitized part in terms of the scanning visibility and quality. It allows to validate the scan path before executing the scan on the physical system and to help the scan path generation.To control the scan time and quality, a scan path planning method for a 6-axis structure, ISOvScan, is proposed. In this method, the overlap zone between two consecutive passes is constant, the orientation of the sensor at each driven point is managed in order to ensure the scanning quality and to maximize the coverage rate of the laser. The method relies on the use of the Least Squares Conformal Maps (LSCM) to transform the 3D surface into a 2D space. The calculation of the scan path can then be done more simply in this 2D space.Since the kinematics of the machine tool does not enable to directly apply the 6 axes scan path created by ISOvScan, the methods for generating a laser scan path adapted to 5-axis machine-tool are proposed in this work. An application on the 5-axis machine-tool is performed to validate this adapted scan path.
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Submitted on : Tuesday, April 16, 2019 - 11:03:31 AM
Last modification on : Saturday, June 25, 2022 - 10:36:45 PM


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  • HAL Id : tel-02100728, version 1


Nguyen Duy Minh Phan. Trajectoires de numérisation adaptatives en contexte in-situ. Génie mécanique [physics.class-ph]. Université Paris-Saclay, 2019. Français. ⟨NNT : 2019SACLN005⟩. ⟨tel-02100728⟩



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