ADDITIVE MANUFACTURING APPARATUS WITH SYSTEMS OF IN-BUILD ASSESSMENT AND CORRECTION OF LASER POINTING ACCURACY FOR MULTIPLE-LASER APPARATUS

摘要

An additive manufacturing system (10) includes a plurality of laser devices (14, 15), a plurality of first scanning devices (18, 19), and an optical system (20). The optical system (20) includes an optical detector (38) and a second scanning device (42). The plurality of laser devices (14, 15) are each configured to generate a laser beam (16, 17). The plurality of first scanning devices (18, 19) is each configured to selectively direct the laser beam (16, 17) from a laser device (14, 15) of the plurality of laser devices (14, 15) across a powder bed (27). The laser beam (16, 17) generates a melt pool (22) in the powder bed (27). The optical detector (38) is configured to detect electromagnetic radiation generated by the melt pool (22). The second scanning device (42) is configured to direct electromagnetic radiation generated by the melt pool (22) to the optical detector (38). The optical system (20) is configured to detect a position of the laser beams (16, 17) in the melt pool (22).