METHOD AND DEVICE FOR THE POWDER BED-BASED ADDITIVE BUILDING UP OF A PLURALITY OF IDENTICAL COMPONENTS
A method and to device for the powder bed-based additive building up of a plurality of identical components, including fixing of each of the components on a base plate by a retaining apparatus, adjusting of a vertical position of at least some of the fixed components relative to the base plate, such that a structural peak of each component is spaced apart from the base plate within a predetermined tolerance range, providing a powder bed of a building material on the base plate up to a height of the tolerance range and layered, additive building up of material on each of the structural peaks of the components.
1 .- 12 . (canceled)
13 . A method for powder bed-based additive building up of a plurality of components, the method comprising:
fixing each of the components on a baseplate by a retaining device,
setting a vertical position of at least some of the fixed components in relation to the baseplate, so that a structural peak of each component is at a distance from the baseplate within a predetermined tolerance range,
providing a powder bed of a building-up material on the baseplate up to a height of the predetermined tolerance range, and
additively building up material layer by layer, in each case on the structural peak of the components, wherein a nominal layer thickness for the additive building up of layers corresponds to a dimension of the predetermined tolerance range at a distance from the baseplate.
14 . The method as claimed in claim 13 ,
wherein the setting of the vertical position, and/or a check of the vertical position, is carried out after each built-up layer of material.
15 . The method as claimed in claim 13 ,
wherein the components are repair components and
wherein, before the fixing, material is in each case removed in a worn region of the components, and the structural peak is thus defined.
16 . The method as claimed in claim 13 ,
wherein the components are cast components, and/or
wherein the components are produced by precision investment casting, and/or
wherein the components are produced by vacuum precision investment casting.
17 . The method as claimed in claim 13 ,
wherein the components are identical, and/or
wherein the components are moving turbine blades and the structural peak represents an airfoil tip.
18 . The method as claimed in claim 13 ,
wherein a distance of each structural peak of the components in relation to the baseplate, and/or in relation to a surface of the powder bed, is measured or laser measured, during the additive building up of layers.
19 . The method as claimed in claim 13 ,
wherein the predetermined tolerance range, measured along a building-up direction, is 10 μm to 80 μm
20 . The method as claimed in claim 13 ,
wherein the predetermined tolerance range, measured along a building-up direction, is 20 μm to 30 μm.
21 . A device for powder bed-based additive manufacturing, comprising:
a baseplate, and
a plurality of retaining devices that are height-adjustable independently of one another in relation to the baseplate,
wherein the retaining devices are respectively designed to fix a component in relation to the baseplate.
22 . The device as claimed in claim 21 ,
wherein each retaining device is designed to be height-adjustable by way of a guide in the baseplate.
23 . The device as claimed in claim 21 ,
wherein each retaining device has a carrier and/or a clamping device, and
wherein each retaining device is designed to be height-adjustable in relation to the baseplate hydraulically, pneumatically, electromechanically or piezoelectrically.
24 . The device as claimed in claim 21 , further comprising:
at least four retaining devices.