Subject: High Speed Machining

From: Leonard Dye <[email-masked]>
Date: 28 Jan 1996 01:38:45 GMT

I'm interested in learning more about HSM. Can anyone lead me to 
publications on the subject?  Are you experienced with HSM applications? 
I understand some of the basic phenomenon behind HSM, like the 
correlation of SFM/Heat bell curve (which I assume only applies to 
milling, and not to turning or drilling).  Is the H.P. requirements 
consistent with traditional machining?  With new innovations in spindle 
technology, are they actually achieving true HSM with smaller diameter 
tools, or just "spinning their wheels"?  What are some of the plateaus 
for various materials in terms of SFM.  What are some applications for 
HSM, do they make roughing cuts or just finish profiling?

Any information would be greatly apprieciated!

Leonard Dye
[email-masked]

---

From: [email-masked](Kevin Richardson )
Date: 28 Jan 1996 04:19:37 GMT

>Any information would be greatly apprieciated!
There are a couple of monthly publications like Modern Machine Shop and
Metalfax that you may be interested in.  These are free subscriptions
to industrial concerns.  We utilize CNC vertical mills and turning
centers in our operations, and time is big money.  We rough pass in
100 depths at 2500 rpm all day long anywhere from 400 - 800 surface
feet/minute depending on the material being used.  We'll then come back
with a finishing tool at about 3000 rpm cutting .010-.020 for a good
finish.  We do this on the VMC's as well.  All these tools are Sandvik,
Iscar etc. carbide insert.

[email-masked]

---

From: [email-masked] (Jonathan M. Elson)
Date: 28 Jan 1996 06:07:58 GMT

Leonard Dye ([email-masked]) wrote:
: I'm interested in learning more about HSM. Can anyone lead me to 
: publications on the subject?  Are you experienced with HSM applications? 

I just checked a book out from the library a few weeks ago on this subject.
it was quite enlightening.  They were talking about removing 600 in^3 / hr
with a 75000 RPM tool (3/4" or less, I think) running up to 75 HP on the
spindle!  Well, I'm not going to be doing that on my WW-II bridgeport.

I can look up the book title if you are interested.  It was a fairly old
book, however, perhaps 15 years old.  It does go over tool materials and
coolant issues.  Some tools and workpiece materials are run without coolant,
the hot tool melts its way through the work!

HSM is definitely NOT limited to milling.  You can do turning at high speeds
as well.  I don't think shaping is likely to be done at these speeds, 
however.  It is probably limited to rotary motions of either tool or 
workpiece.