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Additive manufacturing in situ stress relief

A technology of additive manufacturing and stress relief, applied in the field of structural stress

Inactive Publication Date: 2013-04-24
AEROJET ROCKETDYNE OF DE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such subtractive manufacturing methods place physical constraints on the final shape of the finished part

Method used

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  • Additive manufacturing in situ stress relief
  • Additive manufacturing in situ stress relief
  • Additive manufacturing in situ stress relief

Examples

Experimental program
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Embodiment Construction

[0028] Referring to FIG. 1 , an additive manufacturing machine 10 includes a workspace or chamber 12 that supports an energy emitting device 18 and a support 14 on which a part 16 is supported during manufacture. In this example, energy emitting device 18 emits laser beam 20 that melts material 24 deposited by material applicator 22 . An exemplary material 24 is a metal powder that is applied over the bracket 14 to form layers and subsequent layers to create the desired configuration of the part 16 . The laser beam 20 emits directed energy that melts the powder material into a configuration that forms the desired part dimensions.

[0029] The additive manufacturing process employs a material 24 that is applied to form multiple layers on top of the stent 14 . Selective portions of the layer are subsequently melted by the energy emitted from the laser beam 20 . The additive manufacturing process continues by melting subsequent layers of powder material 24 that are applied to p...

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Abstract

The invention relates to additive manufacturing in situ stress relief. An additive manufacturing process performed by an additive manufacturing machine includes strain gauges that detect stress within a part during fabrication within a defined workspace. When the detected stress is exceeds a desired level the fabrication steps are paused and a stress relieving process is performed within the chamber without moving the part. The additive manufacturing machine includes heaters and coolers for changing the temperature within the chamber to perform the desired stress relieving process in the same space as fabrication is performed. Once it is confirmed that stresses within the part are within acceptable limits the part fabrication process is resumed.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 61 / 549,883, filed October 21, 2011. technical field [0003] The present disclosure generally relates to laser configurations for additive manufacturing machines and processes. More specifically, the present disclosure relates to configurations for relieving stress within a part during creation within an additively manufactured assembly. Background technique [0004] Typical fabrication methods include various methods of removing material from the starting blank to form the desired finished part shape. Such methods employ cutting tools to remove material to form holes, surfaces, general shapes, etc., by cutting material from a starting material. Such subtractive manufacturing methods place physical constraints on the final shape of the finished part. Additive manufacturing methods form the desired part shape by adding one layer at a time, thus provid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105C21D1/30C22F1/00
CPCB29C71/02B29C2035/0211B29C2035/0811B29C2035/0838B29C2035/1666B29C2071/022B29C64/153B33Y40/00B33Y30/00B29C64/295B29C64/371Y02P10/25B22F10/32B22F12/60B22F10/64
Inventor J.J.克雷姆斯J.D.海恩斯Y.高D.E.马特茨克
Owner AEROJET ROCKETDYNE OF DE
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