Severing device

1. A severing device for mechanically severing metal-containing 3D objects from a base plate of a 3D printing apparatus, the severing device comprising:

at least one first machining unit connected to the 3D printing apparatus, the at least one first machining unit including at least one machining tool in the form of a continuous wire and having a working zone encompassing at least part of an area of the base plate.

2. The severing device as claimed in claim 1 further comprising two deflection rollers, wherein the continuous wire is guided over the two deflection rollers and the first machining unit further comprises at least one linear actuator for adjusting a position of at least one of the two deflection rollers such that the working zone of the first machining unit completely encompasses the area of the base plate.

3. The severing device as claimed in claim 1 further comprising a second machining unit connected to the 3D printing apparatus for clearing at least part of a surface of the base plate, wherein the second machining unit includes at least one machining tool having a working zone encompassing at least part of the surface of the base plate.

4. The severing device as claimed in claim 3 , wherein the second machining unit has at least one linear actuator for adjusting a position of the at least one machining tool.

5. A 3D printing apparatus for producing metal-containing 3D objects, the 3D printing apparatus comprising a base plate for supporting the 3D objects at least during production and the severing device as claimed in claim 1 .

6. The 3D printing apparatus as claimed in claim 5 further comprising:

a cleaning unit for cleaning at least part of a surface of the base plate,

wherein the cleaning unit is equipped with at least one suction device for aspirating metal-containing powder and/or machining residues from mechanical severing, and the cleaning unit having a working zone encompassing at least part of the surface of the base plate.

7. The 3D printing apparatus as claimed in claim 6 , wherein the cleaning unit includes at least one filter element for separating the aspirated metal-containing powder and the machining residues.

8. The 3D printing apparatus as claimed in claim 5 further comprising a control unit configured to at least one of drive the first machining unit of the severing device, mechanically sever a 3D object from the base plate, and drive a second machining unit of the severing device, in order to clear at least part of a surface of the base plate.

9. The 3D printing apparatus as claimed in claim 8 , wherein the control unit is configured to drive a cleaning unit for cleaning at least part of the surface of the base plate.

10. The 3D printing apparatus as claimed in claim 8 , wherein the control unit is configured to semi-automatically or fully automatically drive at least one of the first machining unit for mechanically severing the 3D object from the base plate, the second machining unit for clearing at least part of the surface of the base plate, and a cleaning unit for cleaning at least part of the surface of the base plate.

11. A 3D printing apparatus for producing 3D objects comprising:

a base plate for supporting the 3D objects; and

a severing device for mechanically severing the 3D objects from the base plate, the severing device comprising:

a first machining unit comprising a machining tool in the form of a continuous wire guided over two deflection rollers and at least two linear actuators acting in a X direction, each of the at least two linear actuators acting in the X direction mounted between two linear actuators acting in a Z direction, wherein the two deflection rollers are mounted to the at least two linear actuators acting in the X direction such that the first machining unit has a working zone completely encompassing an area of the base plate; and

a second machining unit comprising at least one actuator acting in a X direction, each actuator mounted to an actuator acting in a Y direction.

12. The 3D printing apparatus as claimed in claim 11 , wherein one of the at least two linear actuators acting in the X direction acts in a plane of the base plate and another of the at least two linear actuators acting in the X direction acts outside of the plane of the base plate.

13. The 3D printing apparatus as claimed in claim 11 , wherein the machining tool of the first machining unit is electrically, pneumatically, or hydraulically drivable.

14. The 3D printing apparatus as claimed in claim 11 further comprising a cleaning unit for cleaning a surface of the base plate.

15. The 3D printing apparatus as claimed in claim 14 further comprising a control unit configured to drive the cleaning unit.

16. The 3D printing apparatus as claimed in claim 14 , wherein the cleaning unit includes a plurality of suction openings arranged in the Y direction, each suction opening is connected to a suction pump arranged below the base plate.

17. The 3D printing apparatus as claimed in claim 16 further comprising at least one filter element arranged between the suction openings and the suction pump.

18. The 3D printing apparatus as claimed in claim 11 further comprising a control unit.

19. The 3D printing apparatus as claimed in claim 18 , wherein the control unit is configured to drive at least one of the first machining unit to mechanically sever the produced 3D object from the base plate, and the second machining unit to clear a surface of the base plate.

20. The 3D printing apparatus as claimed in claim 19 , wherein the control unit semi-automatically or fully automatically drives at least one of the first machining unit and the second machining unit.