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Method and device for the improved control of the energy input in a generative layer construction method

A technology of equipment and energy, applied in the field of building three-dimensional objects layer by layer, can solve the problems of measurement technology cost, uneven material properties, real-time data processing cost, etc.

Active Publication Date: 2016-09-14
EOS ELECTRO OPTICAL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] WO 95 / 11100 A1 relates to the production of metal parts from metal powder and describes the problem of forming components with inhomogeneous material properties at a constant laser power
However, WO 2013 / 079581 A1 intends to avoid the relatively large measurement-technical outlay and the outlay for real-time data processing in the detection of the temperature in the vicinity of the respective point of incidence of the laser beam

Method used

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  • Method and device for the improved control of the energy input in a generative layer construction method
  • Method and device for the improved control of the energy input in a generative layer construction method
  • Method and device for the improved control of the energy input in a generative layer construction method

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Embodiment Construction

[0026] refer to figure 1 , the device according to the invention for producing three-dimensional objects by means of a generative layer construction method is firstly described using a laser sintering device as an example.

[0027] as in figure 1 As shown in , the object 3 to be produced is produced layer by layer on a construction base plate 2 . The building floor 2 forms the bottom and the frame 1 forms the side walls of the upwardly open container in which the building process takes place. The building base plate 2 is connected to a lifting mechanism 4, which can move the building base plate in the vertical direction. The frame 1 surrounds with its upper end a build-up zone 5 in which curing takes place. Above the build area 5 is provided an applicator 11 for applying a layer of powdered build material in the build area. As powdery building materials, it is possible to use all powders which are curable by means of heat input, for example polymer powders, metal powders, ...

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Abstract

The invention relates to a method for constructing a three-dimensional object (3) in layers from a pulverulent construction material by solidifying layers of the pulverulent construction material in a successive manner at each layer point which corresponds to a cross-section of the object, wherein the solidification process is carried out by introducing thermal energy. The method has the following step: solidifying all the layer points which correspond to a cross-section of the object. The introduced thermal energy quantity is adjusted at least in a sub-region of the layer dependent on the duration of the previous solidification step for the previous powder layer or dependent on the current solidification step duration, which is calculated in advance.

Description

technical field [0001] The present invention relates to a method and an associated device for layer-by-layer construction of three-dimensional objects by means of generative manufacturing. The invention relates in particular to a method of this type and a device of this type by which the precision of manufactured objects is improved. Background technique [0002] WO 95 / 11100 A1 describes a laser sintering method as a special case of the layer-by-layer generative production method. When using powders that are sintered or fused by introducing thermal energy as the starting material for fabrication, the construction process normally proceeds such that a CAD model of the object to be fabricated is made, broken down into layers, and subsequently The cross section solidifies the build material layer by layer. [0003] For each powder layer, the build process proceeds as follows: [0004] After the layer of powdered build material has been applied to the already cured layer, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C67/00B22F3/105
CPCB29C64/153B33Y50/02B29C64/393Y02P10/25B22F12/44B22F10/28B22F12/13B22F12/49B22F10/36B22F10/362B29C35/0288B29C35/08B33Y10/00B33Y30/00B29K2105/251
Inventor F·米勒S·帕特尔诺斯特A·弗鲁斯
Owner EOS ELECTRO OPTICAL SYST