Patent ID: 11911852
Assignee: PRIMES GMBH MEßTECHNIK FüR DIE PRODUKTION MIT LASERSTRAHLUNG
Field: Other special machines (Mechanical engineering)
Classification: CPC B  G  Y | IPC B  G

Claim 6:
7. A system for the additive manufacturing of components by layered solidification of a powdery construction material by selective laser melting with an energy beam, the system comprising
a beam deflecting device including at least one scan mirror for redirecting and aligning the beam,
a layer applicator,
a component platform,
a processing plane with processing coordinates, the processing coordinates being locations of the powdery construction material to which the beam deflecting device can direct the beam for forming a beam focus for selective local solidification of the powdery construction material, and
a device for determining in the system, for each of a plurality of different selected ones of the processing coordinates, at least one respective beam datum,, wherein the system is configured to apply, by means of the layer applicator, in a powder application step during the additive manufacturing process of a single component by selective laser melting, a new layer of powdery construction material to the component platform on top of a previous layer, which has been previously applied onto the component platform and selectively solidified by means of the beam forming a beam focus in the processing plane,, wherein the device includes a beam barrier, a beam sampling module, and a measuring device having a radiation detector,
wherein the beam barrier and the beam sampling module are movable by means of a linear guide, which is aligned parallel to the processing plane, from a parking position outside of possible beam paths to in-between the beam deflecting device and the plurality of different selected ones of the processing coordinates,
wherein the device is arranged to, during the same powder application step and before solidification of the new layer, for each of the plurality of different selected ones of the processing coordinates:
position the beam barrier and the beam sampling module in at least a respective one of the possible beam paths between the beam deflecting device and a respective one of the plurality of different selected ones of the processing coordinates, and
thereby position the beam barrier and the beam sampling module above the processing plane and at a distance from the processing plane in at least the respective one of the possible beam paths,
align the beam deflecting device with the respective one of the plurality of different selected ones of the processing coordinates,
trigger turning on the beam for a limited period of time, while the beam barrier and the beam sampling module is positioned in the beam path between the beam deflecting device and at least the respective one of the plurality of different selected ones of the processing coordinates, the beam barrier preventing the beam from striking the processing plane while the beam deflecting device is aligned with the respective one of the plurality of different selected ones of the processing coordinates, and
direct, by the beam sampling module, at least a portion of the beam, which is aligned by the beam deflecting device in the direction of the respective one of the plurality of different selected ones of the processing coordinates, to the measuring device, wherein the measuring device is configured to determine the at least one respective beam datum from a signal of the radiation detector resulting from said portion of the beam, wherein the at least one respective beam datum is a deviation within the processing plane of the beam position from the respective one of the plurality of different selected ones of the processing coordinates,, wherein the system is adapted to, in the same powder application step and before solidification of the new layer, sequentially align the beam, by means of the beam deflecting device, with each of the plurality of different selected ones of the processing coordinates and to record, by means of the beam sampling module and the measuring device, the at least one respective beam datum at each of the plurality of different selected ones of the processing coordinates and thus to individually measure the at least one respective beam datum for each of the plurality of different selected ones of the processing coordinates.