Specialists in
CNC Wire Erosion,
Spark Erosion
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General Engineering |
Sheen Spark Ltd
Unit 1
Ewhurst Avenue
Selly Oak
Birmingham
B29 6EY
Tel: 0121 472 6241
Fax: 0121 472 5396
Click here to email
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Spark Erosion | Wire Erosion | EDM Specialists |
Re-Cast White Layer
The EDM process creates a deposit which is called a Re-Cast White Layer. The RCWL clings to the eroded surface.
The thickness of this layer can be critical!
Inadequate control of the thickness can lead to:- Stress Cracking
- Component Disintegration
- Engine Failure
Our EDM procedures are designed to ensure that we produce a super-fine surface finish with a Re-Cast White Layer with the correct thickness so that you can be confident that the...
| EDM process will not let you down! |
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EDM Test Pieces
All components that will be used in stressful situations, such as aircraft parts, are supplied with a data sheet and submitted to the controlling laboratory. The lab will cut a slice of the EDM surface finish and micro-analyse the section. The results are analysed to ensure that the surface is free from stress-cracks, has no evidence of arcing and the correct thickness of Re-Cast White Layer.
Once the component and data sheet are approved, our Quality Procedures ensure that only the approved data sheet is used each time the component is received for EDM. |
EDM Cleaning
The EDM Process leaves debris.
If debris is left in the aperture, the fuel or hydraulic oil can become contaminated. The consequences could be disastrous!
Our EDM Cleaning Procedures ensure that components are cleaned to the appropriate Quality Standards.
When we receive a component, it is degreased before and after the EDM process. We then ultrasonically clean the component in a special bath using approved fluid.
We may have to repeat this process two or three times to ensure that there is no debris left in the aperture. We then dip the component in a de-watering fluid and finally, it is immersed in a rust proofing dip. When it is dry, we wrap the component in rust proof paper.
This process ensures that the components reach you in pristine condition. |
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