Method of producing an additive manufactured object

A method for producing an object of metal, wherein one object is built with an additive manufacturing process based on laser powder-bed fusion or powder-bed fusion by electron beam on a base device having a build surface at one end and including connection means at its end opposite to the build surface, the base device being part of a base device system including at least one base device, said at least one base device or at least an upper part of said at least one base device being made of metal and a supporting means including a solid plate having one or more recesses or apertures holding the base device in a fixed position during the additive manufacturing process, wherein the method comprises the steps of:

• building the object on at least a part of the base device build surface with the additive manufacturing process;
• removing the base device from the additive manufacturing machine subsequent to the step of building the object by removing the base device system of supporting means and at least one base device while the at least one base device still being in a fixed position within the supporting means;
• removing the base device from the supporting means;
• connecting the base device to a CNC machine provided with at least one machining tool, i) wherein the base device is clamped in a CNC machine spindle by means of a connection means or ii) via a CNC machine interface coupling in a connection means;
• post processing the built object in the CNC machine prior to separating the built object from the base device by means of a machining tool in the CNC machine while remaining in a same mounting in the CNC machine;
• and
• building a layer of metal on at least a part of the base device build surface in the additive manufacturing process prior to the first part of the object is built, the layer of metal being of a same metal material as the object of metal, wherein the step of separating the built object from the base device includes removing at least a part of the layer of metal on the base device, and wherein a part of the layer of metal remains on the base device after the separation of the built object, the remaining part of the layer of metal being, in a subsequent step, removed from the base device.