Method for manufacturing a line component

Patent metadata

Field	Value
Publication number	US-10441989-B2
Application number	US-201615208991-A
Country	US
Kind code	B2
Filing date	Jul 13, 2016
Priority date	Jul 14, 2015
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

According to the manufacturing method of the invention the line component, in particular an additively fabricated line component, comprises a line element for conducting a fluid from a first opening to a second opening, and a line branching connected with the line element for conducting the fluid to a third opening, wherein an outer region of the line component is designed load-compliant by means of a numerical optimization program and thereby includes a multitude of irregular topological structures in its outer region. In the manufacturing method of the line component a notch is incorporated on the inside of the line element, which serves to relieve a tension in a highly loaded state of the line component or the line element, a particle-filled gas stream is guided through the interior of the line component, in order to smooth the inside of the line component and/or the line component is subjected to a pressurization, in order to produce a plastic deformation on an inner surface of the line component.

First claim

The invention claimed is:

1. A method for manufacturing a line component for conducting a fluid, the method comprising:
additively fabricating a line component that includes a line element and a line branching by:
piling, in a predetermined region, a particle-shaped material on a base layer of the line component to be fabricated; and
heating up the piled particle-shaped material by means of a heat source such that particles of the particle-shaped material combine with each other and/or with the base layer within predetermined dimensions;

incorporating a notch on an inside of the line element, the notch serving to relieve a tension in a loaded state of the line component or the line element;
guiding a particle-filled gas stream through an interior of the line component in order to smooth an inside of the line component; and/or
pressurizing the line component to produce a plastic deformation on an inner surface of the line component,
wherein the line element is configured to conduct a fluid from a first opening to a second opening, wherein the line branching connected with the line element is configured to conduct the fluid to a third opening, and wherein an outer region of the line component is designed load-compliant by a numerical optimization program to include a multitude of irregular topological structures in the outer region.

2. The method according to claim 1 , wherein the notch substantially extends along a flow direction of the line element and/or substantially along the longitudinal direction of the line element.

3. The method according to claim 1 , wherein the notch is formed to extend substantially linearly.

4. The method according to claim 1 , wherein the notch substantially is formed such that it has a shape which corresponds to a part of an outer cylinder surface.

5. The method according to claim 1 , wherein the notch partly or entirely is arranged in an inner circumferential region of the line element, in which the line branching from the line element also is located.

6. The method according to claim 1 , wherein the notch wholly or partly is arranged in a region adjoining the line branching, which with respect to the geometrical center of gravity of the inner cross-sectional area of the line element includes an angle equal to or less than 75° with respect to a middle of a line branching opening in the cross-section area.

7. The method according to claim 1 , wherein the outer region is an outer circumferential region.

8. The method according to claim 1 , wherein the line branching is connected with the line element, and wherein the line branching branches off from a connecting region of the line element, and the irregular topological structures appear in the outer circumferential region of the line element, which coincides with the connecting region.

9. The method according to claim 1 , wherein an inner region of the line component is designed load-compliant by the numerical optimization program so as to include a multitude of irregular topological structures in the inner region.

10. The method according to claim 9 , wherein the inner region is an inner circumferential region.

11. The method according to claim 10 , wherein the line branching is connected with the line element, wherein the line branching branches off from a connecting region of the line element, wherein the irregular topological structures appear in the inner circumferential region of the line element, which coincides with the outer connecting region of line branching and line element.

12. The method according to claim 1 , wherein the particles of the gas stream have an abrasive and/or compacting effect.

13. The method according to claim 1 , further comprising supplying the particle-filled gas stream in a region of a lowest flow velocity of the line component.

14. The method according to claim 1 , further comprising changing the flow direction of the particle-filled gas stream.

15. The method according to claim 1 , wherein on an inner surface of the line component the pressurization lies above the yield point of the material of the line component.

16. The method according to claim 15 , further comprising performing the pressurization by introducing a medium into the line component.

17. The method according to claim 4 , wherein the notch substantially is formed such that it has a shape obtained by pressing a cylinder body into the inside of the line element.

18. The method according to claim 1 , wherein the notch wholly or partly is arranged in a region adjoining the line branching, which with respect to the geometrical center of gravity of the inner cross-sectional area of the line element includes an angle equal to or less than 45° with respect to a middle of a line branching opening in the cross-section area.

19. The method according to claim 1 , wherein the notch wholly or partly is arranged in a region adjoining the line branching, which with respect to the geometrical center of gravity of the inner cross-sectional area of the line element includes an angle equal to or less than 15° with respect to a middle of a line branching opening in the cross-section area.

20. The method according to claim 1 , further comprising changing the introduction direction of the gas stream into the output direction of the gas stream.

Assignees

• Liebherr Aerospace Lindenberg GmbH

Inventors

• Kroll Lothar
• Schubert Frank
• Demmig Stefan
• Blümer Sebastian
• Altmann Alexander
• Kunzi Camille
• Hölzler David
• Hummel Gerhard

Classifications

• B22F10/28

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title

• B21D26/035 Primary

  including an additional treatment performed by fluid pressure, e.g. perforating · CPC title

• F16L41/021

  T- or cross-pieces (F16L41/025, F16L41/026, F16L41/028 take precedence) · CPC title

• B22F3/24

  After-treatment of workpieces or articles {(B22F3/1146 takes precedence)} · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title