[TheForge] machining degree wedges

Sat Aug 10 08:44:00 2002

Ralph, I made some "set up" tapers by stacking gage blocks under one end
of a piece of annealed cold rolled. Annealing it first helped with the
curling. I got close on the mill, then used a surface grinder to finish
, flipping the piece over occassionally. One is 1/8th per foot, the
other 1 degree. They are about 2 inches wide and 8 inches long.
 To mill new tapers I use these like a tapered parrallel to kick a new
piece of cold rolled over to the correct angle. Square up the new piece
if necessary so you get a good hold on the sides.
 I also have a shaper with a vise that adjusts to angles. With that I
support the new piece a little above the vise jaws on parallels and cut
off the top. The shaper doesn't seem to warp the piece as  much as the
mill. Bob
----- Original Message -----
From: "Ralph Sproul" <[email protected]>
To: <[email protected]>
Sent: Friday, August 09, 2002 7:54 PM
Subject: Re: [TheForge] machining degree wedges


>         Bob,  Thank you.
>
>         When your milling the wide plates to an angle, do you clamp
them in
> the vice in a set of angle blocks? or tag them to the table and mill
in
> between the dawg downs?
>         The reason I'm asking is every tapered  key I've cut has a
curve to
> it like the grain has been disturbed and it curls up on the end.  Do
you
> flip keys or the wide plates when cutting them to split the
distortion? or
> control this curling?
>
> Ralph
>
>
>
> ----- Original Message -----
> From: "Bob Bergman" <[email protected]>
> To: <[email protected]>
> Sent: Friday, August 09, 2002 3:28 PM
> Subject: Re: [TheForge] machining degree wedges
>
>
> > Ralph, I find most keys to be 1/8th in. per foot or 1 degree. When
wider
> > ,I think it is from wear and I try to remachine the dovetail area.
I
> > use .017" for 1 degree. I will machine a wide plate with the taper
and
> > saw off widths that I need.Bob
> > ----- Original Message -----
> > From: "Ralph Sproul" <[email protected]>
> > To: <[email protected]>
> > Sent: Friday, August 09, 2002 1:55 PM
> > Subject: [TheForge] machining degree wedges
> >
> >
> > >         On most of the die keys the taper of the key is 1,  1 1/2,
or
> > 2
> > > degrees.  I was trying to figure out what the actual measure per
inch
> > is and
> > > consulted a chart in the trigonometry book.  It looks like charts
show
> > a
> > > proportionate ratio between parts of a triangle.......so is it the
> > Sine or
> > > the Tangent you are concerned with when setting up a wedge, ram,
and
> > > dovetail taper??
> > >         I noticed the numbers are insugnificant(as far as a
> > difference) in
> > > the 1 & 2 degree chart, but which one is it when you get to larger
> > angles?
> > > Just wondering if anyone has any machinery layout experience in
this.
> > >         So is the bottom line  - a 1 degree angle should be .017
per
> > inch,
> > > and a 2 degree angle should be .035 per inch?..........is that
what
> > those
> > > charts are saying?
> > >
> > >
> > > Ralph
> > >
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