Abstract: A method for assessing the structural quality of three-dimensional components which are produced by laser sintering or laser melting. The component is produced by the successive solidification of individual layers of a construction material solidified by the action of radiation, by sintering or fusing the construction material. The fusion region is captured by a sensor device and sensor values for evaluating the quality of the component are derived therefrom. The sensor values with the co-ordinate values which localize the sensor values in the component are stored with a division of the calculated sensor values into values which are critical to the structural quality of the component and non-critical values to said quality and with a representation of those values critical to the structural quality of the component as to their distance from a reference point lying or arranged in the region of the surface.

Abstract: The invention relates to a device (1) for producing three-dimensional objects (12) by successive solidification of layers of a construction material (9, 10) that can be solidified by radiation at the locations corresponding to the respective cross-section of the object (12), said device having a housing, a construction chamber (4) accommodated therein, a dosing chamber (2, 3), an application device (11) for applying layers of the construction material (9, 10) and a conveying element (13, 14, 17, 18, 21, 22, 37, 38) for transporting the construction material (9, 10), wherein at least two conveying elements (13, 17, 21; 14, 18, 22) are provided for transporting different construction materials (9, 10), said conveying elements comprising separate feed lines (37, 38) to at least one dosing chamber (2, 3).

Abstract: A method for producing a three-dimensional component by means of a laser melting process, in which the component is produced by consecutively solidifying individual layers made of building material by melting the building material, wherein said building material can be solidified by the action of radiation, wherein the melting area produced by a punctiform and/or linear energy input is detected by a sensor device and sensor values are derived therefrom in order to evaluate the component quality. The sensor values detected in order to evaluate the component quality are stored together with the coordinate values that locate the sensor values in the component and are displayed by means of a visualization unit in two- and/or multi-dimensional representation with respect to the detection location of the sensor values in the component.

Abstract: A metal workpiece is formed of a pre-manufactured lower part and an upper piece which is placed thereon using a metal powder sintering process, preferably laser sintering. The lower part is a partial workpiece which is made of a solid piece of metal shaped by machining, forming a ready-to-use workpiece in conjunction with the upper part.