Method and device for powder bed-based additive production of a component
A method uses a powder bed-based additive production of components such as laser melting. The interior wall of a hollow cylinder is used as a construction platform. Progressive production of the component is possible by rotating the hollow cylinder step-by-step in direction. This allows production of components without set-up times as the components can emerge from the powder bed as rotation continues and can be separated from the hollow cylinder by a separating device. The space requirement for the hollow cylinder in this arrangement is relatively small.
1. A system for powder-bed-based additive production of a component, the system comprising:
a horizontally oriented hollow cylinder mounted to rotate about a central axis, an interior wall of the hollow cylinder having a first radius measured from the central axis and used as a construction platform; and
a dosing device configured to partially fill the hollow cylinder with powder to make a powder bed having a surface that is not parallel to the interior wall of the hollow cylinder, forming an arc with a second radius and a center point away from the central axis, at least in sub-regions, the dosing device being disposed in an interior of the hollow cylinder; and
an eroding wire in an interior of the hollow cylinder configured to part-off completed components from the construction platform.
2. The system as claimed in claim 1 , wherein the dosing device includes an oblong dosing aperture, which is parallel to the central axis of the hollow cylinder.
3. The system as claimed in claim 1 , further comprising: collecting device for collecting the parted-off completed components, the collecting device being provided beneath the parting device in the interior of the hollow cylinder.
4. The system as claimed in claim 1 , further comprising: a smoothing device that is configured to remove material that is in engagement with the surface of the construction platform after the parting device has parted-off the completed components from the construction platform.
5. The system as claimed in claim 1 , further comprising: a radiation source configured to produce an energy beam; and a deflection device configured to deflect the energy beam, the deflection device being provided in the interior of the hollow cylinder.
6. The system as claimed in claim 1 , wherein the parting device is an eroding wire.
7. The system as claimed in claim 4 , wherein the smoothing device is a milling roller or an abrasive roller.
8. The system as claimed in claim 5 , wherein the radiation source is a laser.
9. The system as claimed in claim 5 , wherein the deflection device is a mirror.