Re: [CAD_CAM_EDM_DRO] internal contouring with cnc

Hi, perhaps use the "cnc" to make the reamers? cul brian f.

----- Original Message -----
From: "Marcus & Eva" <implmex@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, August 10, 2002 10:57 AM
Subject: Re: [CAD_CAM_EDM_DRO] internal contouring with cnc


> Hi Gerry:
> The success you have will depend largely on the length to diameter
ratio
> of the bore.
> CNC implies single point boring for this application.
> You will need a long and skinny boring bar, and it will vibrate because it
> is sticking out so far and cuts in an unbalanced manner.
> If your bore has a variable diameter, you cannot get around this basic
> principle and CNC will not help you overcome it.
>
> As I see it, you have three choices:
> You could split the bore up into shorter segments so you can use a
stubbier
> bar.
> You can split the bore lengthwise into halves, mill your profile into each
> half, and then glue it back together.
> You can get better and faster at making reamers.
>
> Each of these options implies different equipment and a different focus on
> how you intend to get where you want to go.
> I have no idea whether this kind of work is permissive with respect to
> splitlines and their orientation, but once you've determined that, there
are
> lots of smart guys on this list who can help you tune the method that you
> end up choosing.
>
> Do some experiments to find out which of these basic methods has the most
> promise and then get back to us.
> Cheers
>
> Marcus
>
>
> ----- Original Message -----
> From: "caerbr" <somersgarry@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Friday, August 09, 2002 4:48 PM
> Subject: [CAD_CAM_EDM_DRO] internal contouring with cnc
>
>
> > Hello - I am an amateur flutemaker, working in wood and delrin(a
> > polymer), and I have been wondering about the possibilities which a
> > CNC lathe might offer for creating the bore of the instruments. The
> > bore profile of wooden flutes is rarely a simple cylinder, and varies
> > from flute to flute, and is one of the most time consuming parts of
> > the whole job. Small changes in bore profile also have a crucial
> > effect on the qualities of a flute. The traditional method of making
> > a flute is to take a wooden blank of the correct size, drill a pilot
> > hole and then use a specially constructed reamer in the lathe to get
> > the final internal profile of the bore. Problem is - you have to make
> > a new reamer every time you want to modify the bore profile - which
> > makes prototyping a very slow business. So I have been wondering if
> > there is some technique available(not too expensive!) using a CNC
> > setup and a controlled adjustable boring tool which I could program
> > to cut a given bore profile, which I could then easily when I wanted.
> > This would eliminate the time and effort involved in making new
> > reamers every time I want to experiment with a new bore contour. So
> > there it is - any help or suggestions would be much appreciated.
> > Thanks in advance.
> > gerry
>
>
>
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