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Electrochemical Deburring of our Components




Q. We manufacture Aluminium Hydraulic Brake Master cylinders. While deburring the internal open-out holes, we have the following problems :
1)The mandrel (polypropylene) scores the bore(aluminium Ra 0.3) making it unacceptable
2)The deburring is inconsistent means the edges are still sharp and edge radius (rounding off) does not form.

We use Sodium Nitrate [affil links] as the electrolyte.
Kindly advice on parameters (voltage, amperes, electrolyte, flow, pressure and sources for fixture manufacture).

R.BALAJI
- SHOLINGHUR, TAMILNADU, INDIA
2003



"Electrochemical Machining"

on AbeBooks

or Amazon

(affil links)

A. Dear sir,

Regarding ECDM I was found that we have to change the sodium nitrate heating parameters and flow and pressure this will be very useful to avoid salt formation in m/c the pH we maintained will be changed pH will be reduced to get the good radius in open-outs. I will learn and contact frequently.

Thanking you yours faithfully,

V.Prakkash
- Sholinghur
2004


A. Dear Sir,

At present we are using brass as a mandrel , instead of this material copper-tungsten material to be used for mandrel it will be increase the radius formation in the corners.While tungsten alloys are the most expensive electrode materials for ECDM application, they are far superior when fine surface finishes, deep narrow slots or ribs and small precise holes are required. tungsten alloys are preferred when machining extremely detailed sections. In the ECDM process, Copper-Tungsten withstands erosive effects of short circuit malfunctions far better than other materials.

V.prakkash
- Sholinghur
2005




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