System and method for monitoring manufacturing precision in the additive manufacturing of three-dimensional components

摘要

The invention relates to a system for monitoring manufacturing precision in the additive manufacturing of three-dimensional components, in which a combined illumination and detection element (12) is provided, which is equipped with a two-dimensional detector array (1) and at least one laser radiation source (4), with which electromagnetic radiation is directed onto a region of a material in powder or paste form, with which at least one region of a three-dimensional component is produced as a result of a locally defined energy input. The detector array (1) is arranged and designed such that speckle arising in/on the surface irradiated by the laser radiation source (4) can be detected in a spatially resolved manner. The speckle signals sensed in a spatially resolved manner using the detector array can be fed to an electronic evaluation and control circuit (3). The electronic evaluation and control circuit (3) is connected to an electronic open- and closed-loop control device which is designed to influence the production process. Thermal speckle excitation can be achieved using a separate energy beam or an energy beam (10) with which the energy input takes place locally in a defined manner on the material in powder or paste form for three-dimensional additive manufacturing.