METHOD AND SYSTEM FOR THE PLY-BY-PLY MACHINING OF A COMPONENT MADE OF COMPOSITE MATERIAL, BY APPLYING ENERGY

摘要

The invention relates to machine a component made of composite material in order to eliminate singularities, defects or damage to the component using a method that is repeatable and adaptable. To do this, it is proposed that the defects and their type be identified by image processing of the surface of the component and that the local machining rates at which the plies are machined be regulated at the function of this identification. According to one embodiment, a system (10) for the ply-by-ply machining of defects of a component made of composite material includes a numerical data processing unit (1) combined with a sweep control (2) that commands the sweep of a high-pressure water jet machine (20), and an image formation assembly (3) including an image capturing device (30, 31) connected with the numerical processing unit (1). The processing unit (1) includes regulating devices (11, 13) indexing local sweep rates, by convergence of brightness levels (NB) from the successive sweeps, these being formed by the image capturing assembly (3) toward making the brightness uniform according to a model (Mr) correlating brightness to ply state typology identification (BT) that can be supplied by a library (4). The correlation data (BT) and brightness levels (NB) are stored in memory modules (12, 14) of the processing unit (1).

主权项

1. A method for a ply-by-ply machining of singularities (W1; N1; D4) of a component (6, 6b, 6d) made of composite material, composed of a stack of plies (P1 to P4; P5 to P8; Pa to Pc), by applying energy in a flow by an area-by-area sweep of the component to be machined, wherein a detection of at least one light flux (33) reflected from the areas (Z1, Z2; 60) machined by the sweeping of the component (6) provides local brightness levels (NB) correlated with ply orientations, and at least one parameter (vB) for controlling a variation of depth of material to be machined is then indexed as a function of the plies of the component (6) detected in the swept areas (Z1, Z2; 60) by their brightness level (NB) and of their relative position with respect to an inter-ply interface level (0P, P2/P3, P3/P4), the indexing being calibrated by predefined increments (i1 to i4; i5 to i8) in a range including a reference value (v0) and correlated with degrees of depth of removal of material, so that the brightness levels of successive sweeps converge toward a uniformity of brightness when the ply is constant.