Apparatus and method for applying a fluid to a component

a technology of fluid and component, applied in the direction of cleaning process, apparatus, brushes, etc., can solve the problems of large quantities of gas and fluid emissions, inefficient and costly operation, and negative environmental impact of etching tanks, and achieve the effect of increasing viscosity

Inactive Publication Date: 2011-10-20
ROLLS ROYCE PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0026]According to another aspect of the present invention, there is provided a method of applying a fluid to a target region of a component using an apparatus of the first aspect of the present invention, comprising connecting a fluid supply to the fluid applicator, mounting the fluid applicator on the means for guiding the applicator along a predetermined path, bringing the applicator head into physical contact with the target region

Problems solved by technology

Etch tanks may have a negative environmental impact, as well as being inefficient and costly to run.
They may also produce large quantities of gas and fluid emissions.
Specialist disposal of used and waste product is required, increasing maintenance and running costs.
This often results in unsightly and inconvenient “runs” of etchant fluid straying into areas where surface etching was not required.
Swab etching is also a comparatively labour intensive method of surface etching, involving close operator contact with hazardous chemicals
However, in combination with the above methods, these practices involve high capital cost a

Method used

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Examples

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Embodiment Construction

[0064]The present invention relates to an apparatus and method for applying a fluid such as a chemical etchant to a target area of a component. The following description uses the example of a weld line as a target feature of a component, an area of which may be appropriate for chemical etching. FIG. 1 illustrates a typical weld line 2, such as might be found on a metallic drum assembled using electron bean welding, around which is a heat affected zone 4. If the drum is produced from titanium, an alpha case layer can occur within the heat affected zone 4. This layer is understood to be an oxygen enriched surface layer of titanium that acts to reduce the fatigue life of the component. It is therefore desirable to remove this alpha case layer using a locally applied chemical etchant including for example Nitric, Hydrofluoric, Hydrochloric or Hydroflourosilic acids. The etchant is applied over a target area 8 that includes the weld line 2, the heat affected zone 4 and a safety zone 6. I...

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Abstract

Apparatus for applying a fluid to a target area of a component is provided, the apparatus comprising a fluid applicator 10 and means 12, 300, 400 for guiding the fluid applicator 10 along a predetermined path with respect to the component 26; the fluid applicator 10 comprising a body 14 and an application head 50, 100, 200 mounted on the body 14 and operable in use to be brought into physical contact with the component 26.

Description

[0001]The present invention relates to an apparatus and method for applying a fluid to a component. The invention is particularly but not exclusively related to an apparatus and method for applying a chemical etchant to a target area of a component.[0002]Chemical etching is a commonly used technique for removing one or more surface layers from a metallic component. An acid, base, or other chemical etchant fluid is applied to an area of a component for a period of time and dissolves a surface layer of the component. Various methods may be used to bring the etchant fluid into contact with the component.[0003]One known method involves filling a large tank with etchant fluid and immersing a component in the fluid. Masking material may be used to prevent the etchant fluid removing a surface layer from the entirety of the component. Etch tanks may have a negative environmental impact, as well as being inefficient and costly to run. They may also produce large quantities of gas and fluid e...

Claims

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Application Information

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IPC IPC(8): A46B11/00
CPCA46B13/04A46B2200/20B05C1/06C23F1/08C23G3/00B05C1/027
Inventor CLARK, DANIELMILLS, DAVID W.
Owner ROLLS ROYCE PLC
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