Method for smoothing a surface of a component

Patent metadata

Field	Value
Publication number	US-11612977-B2
Application number	US-202016784704-A
Country	US
Kind code	B2
Filing date	Feb 7, 2020
Priority date	Feb 8, 2019
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

The present invention relates to a method for smoothing a surface of a component, in which a component is placed in a liquid-solids mixture; a relative movement is produced between the liquid-solids mixture and the component; thus there is a flow of the liquid-solids mixture along the surface; wherein there is provided in the liquid-solids mixture a guide surface, along which the liquid-solids mixture flows, wherein a directional component toward the surface is imposed on the flow.

First claim

What is claimed is:

1. A method for smoothing a surface of a component, comprising the steps of:
placing the component in a liquid-solids mixture;
producing a relative movement between the liquid-solids mixture and the component;
providing a flow of the liquid-solids mixture along the surface;
wherein there is provided in the liquid-solids mixture a guide surface, along which the liquid-solids mixture flows, wherein a directional component toward the surface is imposed on the flow;
wherein the surface of the component comprises a suction-side surface and a pressure-side surface, wherein the guide surface is assigned to both the suction-side surface and the pressure-side surface in the liquid-solids mixture.

2. The method according to claim 1 , wherein the guide surface is a lateral surface of a guide unit that is subject to flow in the liquid-solids mixture, wherein the liquid-solids mixture thus also flows along a lateral surfaces opposite the guide surface.

3. The method according to claim 1 , wherein the surface of the component has a curved course when observed in a sectional plane, and the guide surface has a complementary curved course when observed in the same sectional plane.

4. The method according to claim 1 , wherein the guide surface is arranged relative to the surface wherein a distance that is taken perpendicular to a flow line profile between the component surface and the guide surface, when observed in a sectional plane, decreases in the flow direction.

5. The method according to claim 1 , wherein an additional guide surface is provided in the liquid-solids mixture, along which guide surface the liquid-solids mixture flows, wherein the component is arranged between the guide surfaces.

6. The method according to claim 5 , wherein the guide surfaces are arranged relative to each other in such a way that a distance between the guide surfaces that is taken perpendicular to a flow-line profile between the guide surfaces, when observed in a sectional plane, decreases in the flow direction.

7. The method according to claim 1 , wherein the component is configured and arranged in a gas channel of a turbomachine, wherein the surface is an upper surface facing the gas channel.

8. The method according to claim 7 , wherein the component is a blade element or vane body for the turbomachine.

9. The method according to claim 1 , wherein, in order to produce the relative movement in a stationary coordinate system, the component is moved through the liquid-solids mixture.

10. The method according to claim 9 , wherein the guide surface or guide surfaces are moved together with the component through the liquid-solids mixture.

11. The method according to claim 1 , wherein the liquid-solids mixture is provided with sphere-shaped solids.

12. The method according to claim 1 , further comprising the steps of:
providing a container for holding the liquid-solids mixture and for arranging the component;
providing a movement mechanism for producing the relative movement between the liquid-solids mixture and the component;
providing a guide surface in the container, in order to impose on the flow the directional component toward the surface.

Assignees

• MTU Aero Engines AG

Inventors

• Fessler-Knobel Martin
• Windprechtinger Joerg
• Asti Georg

Classifications

• B24B31/14

  Abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls · CPC title

• F01D9/02

  Nozzles; Nozzle boxes; Stator blades; Guide conduits {, e.g. individual nozzles (nozzle boxes F01D9/047)} · CPC title

• B24B31/003

  whereby the workpieces are mounted on a holder and are immersed in the abrasive material · CPC title

• B24B31/12 Primary

  Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00 {(in general B24B55/00)} · CPC title

• B24B37/02

  designed for working surfaces of revolution · CPC title