RE: [CAD_CAM_EDM_DRO] Re: Small taps and dies

My training wasn't in mech engineering, though I grew up around family home
diy shops with lathes, shapers mills, the usual stuff.

My degree's are all electronics where they teach you a little in machine
shop techniques. When I first started my company I needed a complex punch
and die, I milled and hand polished both to a nice tight sliding fit, took
months. Then someone told me about EDM could have made the punch and die in
a day. The college taught the best you can get is about a thou machining,
and then everything had to be ground. It's amazing how blind the lecturers
were, and how blind fresh graduates are. Nowadays I service EDM kit, but
there's still so much to learn, and the more you know, the more you realise
you don't know. It's nice being part of these groups since there are people
of all sorts of skills and together we all learn from each other.



Regs Mark



Dr. Mark Vaughan Ph'D. B.Eng. M0VAU

Managing Director

Vaughan Industries Ltd, reg in UK no 2561068

Water Care Technology Ltd, reg in UK no 4129351

Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
Phone/Fax 44 1872 561288

RSGB DRM111(Cornwall)

_____

From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Michael Fagan
Sent: 20 August 2007 22:01
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Re: Small taps and dies



Right, that's not surprising to me. Personally, I'm scared stiff to try
using anything smaller than a #4-40...

On 8/20/07, Mark Vaughan <mark@.... <mailto:mark%40vil.uk.com> com>
wrote:

>
> Thanks Michael
>
> Link looks interesting, we have all used things like sintered bronze, I
> never knew you could get such strength from these processes, then again
> the
> material uniformity would be much better so stresses much more even
> throughout the material.
>
> As for fine taps though I am told these are still forged and the thread
> rolled into them since uniformity of material isn't good for the stresses
> they endure.
>
> All interesting stuff though.
>
> Thanks Mark
>
> Dr. Mark Vaughan Ph'D. B.Eng. M0VAU
>
> Managing Director
>
> Vaughan Industries Ltd, reg in UK no 2561068
>
> Water Care Technology Ltd, reg in UK no 4129351
>
> Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
> Phone/Fax 44 1872 561288
>
> RSGB DRM111(Cornwall)
>
> _____
>
> From: CAD_CAM_EDM_ <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>

DRO@yahoogroups.com <CAD_CAM_EDM_DRO%40yahoogroups.com>

> [mailto:CAD_CAM_EDM_ <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>

DRO@yahoogroups.com<CAD_CAM_EDM_DRO%40yahoogroups.com>]

> On Behalf Of Michael Fagan
> Sent: 20 August 2007 21:30
> To: CAD_CAM_EDM_ <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>

DRO@yahoogroups.com <CAD_CAM_EDM_DRO%40yahoogroups.com>

> Subject: Re: [CAD_CAM_EDM_DRO] Re: Small taps and dies
>
> I believe he's referring to powder metallurgy, which is often used to make
> end mills and other high-end cutting tools. It's like sintering, but at a
> much higher pressure and temperature, which result in a solid and
> incredibly
> durable cutting tool. See http://en.wikipedia
> <http://en.wikipedia <http://en.wikipedia.org/wiki/Powder_metallurgy>

.org/wiki/Powder_metallurgy>

> .org/wiki/Powder_metallurgy
>
> On 8/19/07, Mark Vaughan <mark@... <mailto:mark%40vil.uk>

<mark%40vil.uk>. <mailto:mark%<mark%25>

> 40vil.uk.com> com>
> wrote:
> >
> > Hi Andrey
> >
> > Sintering, I think is when it's made of a powder that is compressed and
> > fused by heat, like bronze filters, and alloy pulleys.
> >
> > I wasn't aware you could do that with taps and drills, never thought
> they
> > would have enough tensile strength.
> >
> > Learn something new everyday, I'll have to look it up and see what can
> be
> > done, normally I get fine things EDM eroded for a job, but that's not
> > cheap.
> >
> > Thanks Mark
> >
> > Dr. Mark Vaughan Ph'D. B.Eng. M0VAU
> >
> > Managing Director
> >
> > Vaughan Industries Ltd, reg in UK no 2561068
> >
> > Water Care Technology Ltd, reg in UK no 4129351
> >
> > Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
> > Phone/Fax 44 1872 561288
> >
> > RSGB DRM111(Cornwall)
> >
> > _____
> >
> > .
> >
> >
> >
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
>
>

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