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Method and apparatus for additive manufacturing

a technology of additive manufacturing and manufacturing methods, applied in the direction of additive manufacturing processes, manufacturing tools, manufacturing driving means, etc., can solve the problems of dimension errors, reduced mechanical properties of final articles, etc., and achieve the effect of less sensitive powder dispatching system, higher machine yield and reduced production costs

Inactive Publication Date: 2019-04-04
ARCAM AB
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an additive manufacturing apparatus and method that can efficiently build higher quality parts without sacrificing material properties of the final product. The apparatus changes the angle of the manufactured part relative to the powder distributor from one layer to another, which helps remove repetitive errors and reduces mechanical properties of the final article. The support structure also rotates to change the angle between the powder distributor and the previously built layer, which further helps remove errors and distribute powder layers evenly. The apparatus can use various powder distribution processes and reduces the mechanical complexity of the machine. The angle change also improves powder distribution related errors, resulting in higher yield and better mechanical properties of the final article.

Problems solved by technology

In the latter case, errors may be stacked onto each other from one layer to another, which in the end may cause not only dimension errors but also reduced mechanical properties of the final article.

Method used

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  • Method and apparatus for additive manufacturing
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Embodiment Construction

[0032]Various example embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, embodiments of the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly known and understood by one of ordinary skill in the art to which the invention relates. The term “or” is used herein in both the alternative and conjunctive sense, unless otherwise indicated. Like numbers refer to like elements throughout.

[0033]To facilitate the understanding of this invention, a number of terms are defined below. Terms defined herein have meanings as commonly understood by a person of ordinar...

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Abstract

A method for forming at least one three-dimensional article through successive fusion of parts of a powder bed on a support structure, the method comprising the steps of: providing at least one model of the three-dimensional article, lowering the support structure a predetermined distance and rotating the support structure a predetermined angle in a first direction before applying a first powder layer covering the lowered and rotated support structure, rotating the at least one model by the predetermined angle in the first direction before directing the at least one first energy beam from the at least one first energy beam source at selected locations for fusing the first powder layer, the at least one first energy beam source causing the first powder layer on the stationary support structure which is stationary to fuse in the selected locations according to the model to form first portions of the three-dimensional article.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims benefit of U.S. Provisional Patent Application No. 62 / 565,596, filed on Sep. 29, 2017, the contents of which as are hereby incorporated by reference in their entirety.BACKGROUNDTechnical Field[0002]The present invention relates to a method and apparatus for additive manufacturing of 3-dimensional objects.Related Art[0003]Freeform fabrication or additive manufacturing is a method for forming three-dimensional articles through successive fusion of chosen parts of powder layers applied to a work plate.[0004]Such an apparatus may comprise a work plate on which the three-dimensional article is to be formed, a powder dispenser, arranged to lay down a thin layer of powder on the work plate for the formation of a powder bed, a laser beam source for delivering energy to the powder whereby fusion of the powder takes place, elements for control of the laser beam source over the powder bed for the formation of a cross section ...

Claims

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Application Information

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IPC IPC(8): B22F3/105B33Y10/00B33Y30/00B33Y50/02B22F3/10
CPCB22F3/1055B33Y10/00B33Y30/00B33Y50/02B22F3/1017B22F2003/1057B29C64/153B29C64/241B29C64/245B29C64/20Y02P10/25B22F12/37B22F10/362B22F12/13B22F12/55B22F10/32B22F10/28B22F12/52B22F12/90B22F10/36B23K26/0823B23K26/083
Inventor HELLESTAM, CALLE
Owner ARCAM AB
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