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Machine and process for powder-based additive manufacturing

An additive manufacturing, powder technology, applied in the field of powder-based additive manufacturing, to achieve the effect of improving uniformity

Active Publication Date: 2014-08-27
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] An additional problem common to the different proposals of the prior art is that it is difficult (sometimes impossible) to achieve a uniform thickness and density of the powder layer over the entire extent (length, width) of the working area

Method used

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  • Machine and process for powder-based additive manufacturing
  • Machine and process for powder-based additive manufacturing
  • Machine and process for powder-based additive manufacturing

Examples

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Embodiment Construction

[0045] In different figures, identical or similar elements bear the same reference signs. However, the description of their structure and their function will not be systematically repeated.

[0046] In FIG. 1 , a machine for additively manufacturing a component 40 according to the prior art is schematically shown. An energy source, in this case a laser source 10 , emits a laser beam 3 whose direction is controlled by a mirror subjected to a galvanometer 20 . The optical lens 30 allows the beam 3 to be focused at the level of the working area 4 so as to heat the upper layer of the powder 2 according to a precise pattern, thus melting the powder in a selective manner. After the powder layer has been processed by the beam, the working tray 60 is lowered by unit thickness and covered with a new powder layer, continuing in this way to form the assembly 40 layer by layer. Depending on the type of energy beam and the powder used, the thickness of the powder layer may vary from a fe...

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Abstract

The invention in particular relates to a machine (1) for additive manufacturing that frits or melts powder (2) using an energy beam (3) acting on a powder layer (23) in a working zone (4), said machine comprising a device for producing a layer of said powder, said device comprising: means (5) of storing the powder; means (6) for distributing the powder, which means is able to travel over the working zone in order to distribute the powder in a layer (23) having a final thickness (24) tailored to the additive manufacturing; feeding means (7) able to transfer the powder from the storage means (5) to the distributing means (6); and dosing means (8) able to control the amount of powder transferred from the storage means (5) to the distributing means (6), said machine being characterised in that: the storing means (5) are located above the working zone (4); the feeding means (7) are gravitational feeding means; and the feeding means (7) and the dosing means (8) are able to move with the distributing means (6).

Description

technical field [0001] The present invention relates to machines and methods for powder-based additive manufacturing by sintering or melting particles of said powders by using energy beams such as electromagnetic radiation (eg laser beams) or particle beams (eg electron beams). [0002] More specifically, the present invention relates to apparatus and methods for layering (ie, preparing) a powder bed prior to sintering or melting the layer using an energy beam. Background technique [0003] Document EP-1641580-B1 discloses in particular a layering device by laser sintering of powders (metal or ceramic). The plant comprises a feed tray which allows the powder to be stored and delivered in controlled quantities to a fluted drum which, on the one hand, enables During the process, the amount of powder is conveyed and distributed on the storage tray, on the other hand, the powder can be compacted by the rolling movement of the roller during the second pass. The powder is then s...

Claims

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Application Information

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IPC IPC(8): B22F3/105B29C67/00C04B35/64
CPCB29C67/0085B23K35/0244B29C67/0077B22F2003/1056B22F3/1055B29C64/205B29C64/343B29C64/218B33Y30/00B29C64/153B29C64/329B29C64/255Y02P10/25B22F12/44B22F10/28B22F12/49B22F12/52B22F12/22B22F12/63B22F12/67B22F12/57B22F10/37B05C19/04B05D3/007B05D3/14B22F3/105B22F7/02
Inventor F·皮亚洛G·瓦尔朗P·维尔
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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