Hello,

I'm interested in burr-free drilling.
What is IMHO?
Could you please give more informations or links for documentations.

Best Regards.


Habib SAHLI
Engineering Dept.
Tel : 00216 72 451 144
Fax : 00216 72 451 333
E.mail : [log in to unmask]


----- Original Message -----
From: "Brian Ellis" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, August 08, 2006 9:43 AM
Subject: Re: [TN] Deburring and Polishing Brushess


> IMHO, avoiding the production of burrs is a better technique than
> deburring. This implies as near-perfect drill bits as possible, with a
> controlled geometry to very tight tolerances, the correct rotational
> speed, pressure and advance and the use of the correct entry and exit
> materials.
>
> The use of abrasives, in any form, is not advisable, as they contaminate
> the surface with implanted particles, often swaged over, and the plastic
> matrix of brushes can cause polymer smearing. It is my experience that
> abrasive cleaning causes more harm than good.
>
> I touched on these matters in more detail in my book. (Section 7.2.3 for
> burr-free drilling, 7.2.4 for deburring and abrasive cleaning)
>
> Brian
>
> Baski Devre wrote:
> > Dear Technetters
> > As you know that prior to dry film coating or LPI soldermask coating,
> > surface preparation is so crucial. it can directly effect dry film
> > adhesion but we think that deburrinmg of the panels after  CNC drilling
> > operation and prior to electrolytic  copper plating is more crucial.
> > Does anybody have an application to deburr and polishing of the panels
> > after CNC drilling. If yes which type of brushes you use for the first
> > station to deburr and which type of brushes you use to polish the bord
> > just after the deburring process.
> > Best Regards
> >
>
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