DE-102012011418-B4 - Stereolithography system

DE102012011418B4DE 102012011418 B4DE102012011418 B4DE 102012011418B4DE-102012011418-B4

Abstract

Stereolithography system comprising a mounting block (12) for receiving linear drives (3, 4) movable in the y- and x-axes as a crossed arrangement and for receiving a build vessel (1) with an integrated build platform (2) movable in the z-axis, wherein the crossed arrangement of the linear drives for the y-axis (3) and for the x-axis (4) is arranged vertically above the build vessel (2), wherein a laser source (6) is directed with the beam exiting vertically downwards in the direction of the resin-filled build vessel (1) and is attached to the linear drive for the x-axis (4) via a fastening means (5), wherein a dynamically adjustable focusing optic is integrated on the laser source (6), characterized in that the dynamically adjustable focusing optic is a motor-driven telescope or a driven objective turret, wherein the dynamically adjustable focusing optic allows the line width of the laser beam to be adjusted while simultaneously modulating the Laser power is dynamically adjusted during the construction process.

Inventors

Mark Vehse
Hermann Seitz
Jörn Hennig

Assignees

UNIVERSITÄT ROSTOCK

Dates

Publication Date: 20260513
Application Date: 20120608

Claims (4)

Stereolithography system comprising a mounting block (12) for receiving linear drives (3, 4) movable in the y- and x-axes as a crossed arrangement and for receiving a build vessel (1) with an integrated build platform (2) movable in the z-axis, wherein the crossed arrangement of the linear drives for the y-axis (3) and for the x-axis (4) is arranged vertically above the build vessel (2), wherein a laser source (6) is directed with the beam exiting vertically downwards in the direction of the resin-filled build vessel (1) and is attached to the linear drive for the x-axis (4) via a fastening means (5), wherein a dynamically adjustable focusing optic is integrated on the laser source (6), characterized in that the dynamically adjustable focusing optic is a motor-driven telescope or a driven objective turret, wherein the dynamically adjustable focusing optic allows the line width of the laser beam to be adjusted while simultaneously modulating the Laser power is dynamically adjusted during the construction process.
Stereolithography system according to Claim 1 , characterized in that the focusing optics (7) are designed to be interchangeable.
Stereolithography system according to Claim 1 , characterized in that the laser source (6) is electrically supplied via trailing cables.
Stereolithography system according to Claim 1 , characterized in that a diode laser is used as the laser source (6).

Description

The invention relates to a stereolithography system for the production of three-dimensional components. Description of the invention The DE 10 2009 009 503 B3 This relates to a device and a method for manufacturing a workpiece according to a rapid prototyping process using a laser for generating a laser beam for curing a material and a workpiece carrier that can be directly irradiated by the laser from a predetermined solid angle range. The device consists of a laser for generating a laser beam for curing the material and a workpiece carrier that can be directly irradiated by the laser. Furthermore, the device includes an optical device, in particular a mirror, with which the laser beam is deflected so that the workpiece carrier can also be indirectly irradiated by the laser. In the DE 10 2004 057 527 B4 This document describes a process for manufacturing an electrode body for electrochemical machining (ECM) of workpieces, where the die is produced using stereolithography. In the rapid prototyping (RP) process, the electrode body is built up layer by layer in a liquid polymer bath. For this purpose, the desired cross-section of a layer of the electrode body is created using a laser that is both horizontally and vertically adjustable. The laser is moved along the horizontal plane according to the desired contour, and a portion of the polymer layer in the liquid polymer is exposed and thus cured by corresponding exposure. The invention according to US 2003 001313 A Disclosed is a method and an apparatus for producing ceramic shaped bodies by sintering selected areas of a ceramic material with a laser beam to form the shaped body. To produce the shaped body, the liquid suspension or plastic mass is applied layer by layer, and each layer of material is sintered at selected locations using the laser beam. The laser beam is preferably controlled by means of the layer-by-layer design data. The apparatus for producing ceramic shaped bodies has a support surface, an application unit for applying layers of a ceramic material, a drying unit for the applied layers, and a laser unit for generating a laser beam with means for controlled alignment of the laser beam to selected locations of each layer of the ceramic material in order to sinter the irradiated material and form the shaped body. The means for controlled alignment of the laser beam are preferably designed as a laser scanner, wherein the laser scanner is controlled by means of digital design data for the shaped part. This allows for the production of a prototype directly from the design data. The laser unit is moved by a robot arm over the surface of the applied layer, and the corresponding layer of the molded part to be produced is mapped onto the applied layer. The US 2002 185 782 (A1 This describes a method for producing a three-dimensional object by stereolithography. Solid reinforcing materials are mixed with the liquid medium such that at least a portion of the solid reinforcing material is located in the layer of liquid medium between the top surface of the last layer formed and the top surface of the liquid medium. An acoustic field is then generated in the liquid medium such that the acoustic field is present in at least a portion of the layer of liquid medium between the top surface of the last layer formed and the top surface of the liquid medium, and the liquid medium is subsequently cured. In the US 2004 094 728 A This document describes a device for sintering and, if necessary, removing material and/or marking, and subsequently reworking the finished workpiece using focused electromagnetic radiation. The device consists of a machine housing containing a build chamber. A scanner is located in the upper part of the build chamber, into which the beam of a sintering laser is coupled. A height-adjustable workpiece platform and a material feed system are provided in the lower part of the build chamber. This system transports powdery, pasty, or liquid sintering material from a storage container into the process area via the workpiece platform. The scanner is movable in the upper part of the build chamber, traveling along one axis, and is mounted on a scanner support bridge that is motor-driven and moves above the workpiece platform. The scanner support bridge moves along a second axis on two parallel supports spaced apart by the width of the build chamber. The motorized drive elements of the scanner support are connected to a control computer, which is responsible for the entire process sequence. This control computer manages both the movement of the scanner across the workpiece platform and the movement of the scanner mirror within the scanner housing during the manufacturing process. In addition to a possible shift of the In addition to the scanner's movement along the x- and y-axes, it can also be shifted along the z-axis, allowing the scanner to be moved vertically over the workpiece platform or in adjacent areas. For this purpose, the two parallel s