Additive manufacturing of three-dimensional articles

An article, three-dimensional technology, applied in processing and manufacturing, manufacturing tools, additive manufacturing, etc., can solve problems such as destroying cathode components, and achieve the effect of improving reliability

Active Publication Date: 2019-10-01
ALCAM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The discharge current may damage the cathode element and / or electronics connected to the cathode element, which in turn will stop the additive manufacturing process

Method used

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  • Additive manufacturing of three-dimensional articles
  • Additive manufacturing of three-dimensional articles
  • Additive manufacturing of three-dimensional articles

Examples

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Embodiment Construction

[0021] Various embodiments of the inventions will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the inventions 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 examples 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 this invention belongs. Unless stated otherwise, the term "or" has alternative and conjunctive meanings herein. Like numbers refer to like elements throughout.

[0022] In addition, in order to facilitate the understanding of the present invention, a number of terms are defined below. The terms defined herein have meanings commonly understood by those o...

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Abstract

A method is provided for forming a three-dimensional article through successively depositing individual layers of powder material that are fused together so as to form the article. The method includes: providing at least one electron beam source emitting an electron beam; providing a leakage current detector for sensing a current through the anode and / or the Wehnelt cup; providing a low impedancevoltage source connectable to the Wehnelt cup via a switch, where the voltage source is having a more negative potential than a negative potential applied to the cathode; and protecting the cathode against vacuum arc discharge energy currents when forming the three-dimensional article by providing the Wehnelt cup to the low impedance negative voltage by closing the switch when the leakage currentdetector is sensing a current through the anode and / or the Wehnelt cup which is higher than a predetermined value.

Description

technical field [0001] The invention relates to a method for the additive manufacturing of three-dimensional objects by successively melting individual layers of powder material. Background technique [0002] Free-form manufacturing, or additive manufacturing, is a method of forming three-dimensional objects by continuously melting selected portions of a powder layer applied to a workbench. [0003] Additive manufacturing equipment may include: a table on which a three-dimensional object is to be formed; a powder dispenser or powder dispenser arranged to lay down a thin layer of powder on the table to form a powder bed; a high energy beam for injecting The powder transfers energy, whereby melting of the powder occurs; elements for controlling the energy released by the energy beam on the powder bed for forming cross-sections of three-dimensional objects through partial melting of the powder bed; and the control computer, which stores relevant Continuous cross-section inform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J3/02B22F3/105B22F7/06B29C64/153B29C64/264H01J37/305H01J37/06
CPCH01J3/02H01J37/305B29C64/153B29C64/268H01J37/065H01J2237/0206B33Y10/00B33Y50/02B33Y30/00B22F7/06B29C64/264H01J37/06H01J2237/3128Y02P10/25B22F12/41B22F10/28B22F12/45B22F10/364B22F10/36B22F10/362B22F12/55B22F10/32B22F12/90B23K15/0086B28B1/001B28B17/0081B23K15/06H01J37/302H01J37/315B23K15/02B22F10/00
Inventor 克里斯蒂安·埃克伯格
Owner ALCAM
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