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Method for producing hollow, large dimensional turbomachine components

A turbine, large-scale technology, applied in the direction of turbines, mechanical equipment, process efficiency improvement, etc., can solve problems such as high thermally induced stress deformation

Pending Publication Date: 2021-06-11
NUOVO PIGNONE TECH SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, additive manufacturing is limited by the fabrication of thin-walled components, mainly due to the high thermally induced stresses and consequent deformations induced by the additive manufacturing process

Method used

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  • Method for producing hollow, large dimensional turbomachine components
  • Method for producing hollow, large dimensional turbomachine components
  • Method for producing hollow, large dimensional turbomachine components

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Embodiment Construction

[0018] In order to reduce manufacturing cost and manufacturing time, and to achieve enhanced manufacturing flexibility of large thin-walled turbine components, the methods disclosed herein provide steps aimed at reducing or avoiding thermally induced deformation of the final part, such as buckling, so that A net or near net shape part is obtained at the end of the manufacturing process.

[0019] Since thermally induced deformation is concentrated at one or both end portions of a component produced by additive manufacturing, the methods disclosed herein provide for the production of semi-finished components including at least one end portion to be removed therefrom. Such sacrificial end portions may be designed such that inadmissible deformations (ie, those that would be unacceptable in the finished product) are located entirely in the sacrificial end portion, which is removed when the part cools. In some embodiments, the sacrificial end portion is configured to reinforce the c...

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Abstract

A method of making hollow turbomachine components (17) is disclosed. The method provides for an additive manufacturing step, wherein on a substrate (19) the following are manufactured in sequence: a first terminal portion (17.1) of a semi-finished component, said first terminal portion adhering to said substrate (19); an intermediate portion (17.2) adjoining the first terminal portion (17.1); and a second terminal portion (17.3) adjoining the intermediate portion (17.2). After cooling of the component, at least one of said first terminal portion and second terminal portion is removed. The removed terminal portion includes sacrificial features, where thermally induced deformations of the component are concentrated, or which are aimed at stiffening the component, such that deformations are reduced or prevented.

Description

technical field [0001] This paper discloses an improved method of producing parts using additive manufacturing. In particular, the present disclosure provides improved methods of producing thin-walled hollow parts to reduce manufacturing time, cost, and material waste. Background technique [0002] Additive manufacturing techniques have been proposed in several manufacturing fields. In particular, additive manufacturing has been proposed for producing annular or cylindrical components of turbomachines, such as eg flanges and casings of compressor segments and turbine segments. These are thick, large pieces of machinery that must withstand high internal pressure and high temperature conditions, and which should also be strong enough to resist the impact of any rotating blades that might break inside the turbine. US2018 / 0221958 discloses a method of producing components for turbines using hybrid additive manufacturing techniques. [0003] Additive manufacturing is advantage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F5/00B33Y80/00
CPCB33Y80/00B22F5/009Y02P10/25B22F10/66B22F10/47B22F10/36B22F10/25B22F12/41B22F12/37B23P15/00B22F3/105B22F10/28B33Y10/00B22F12/30
Inventor M·萨莱M·格雷尼F·基亚里P·莫拉
Owner NUOVO PIGNONE TECH SRL