Re: Metal Finishing Questions

On May 10, 3:36 am, mil...@xxxxxxx wrote:

Vinny's got it. Thats they way to it. Being a moldmaker for a few
years you basicaly have to learn how to "hide" surface imperfections,
ususlaly caused by handling the blocks/ sliding plates ect. before the
mold is shipped to the customer. Its the last little step that gives
your mold that "wow" by the customer when they inspect it. By looking
closely & determining the direction of the original surface grind ,
sanding in that direction will easily hide scratches & shallow
imperfections. To put it another way, you are scratching up the
surface with fine emery paper making a new consistent surface finish
emulating a surface ground finish.

Very helpful background information as well as the logic to dealing
with this problem.


The only thing I have to add to polisher Vinny's :-) technique, is
use mineral spirits as a lubricant. It will help "float" the particles
away & keep the emery cutting & not loading up.

I prefer jet fuel... kerosene. Is there a reason I have to use mineral
spirits?


Next step: surface preparation for class A #1 lens finish diamond
polish<g> man I'm glad I'm not a polisher. Too many vibrations with
the hand reciprocater (j-off machine) Those ultrasonic units are
sweeeeeeeeet.

If you wish to describe this specific process in detail such as how
many times you have to change grits of diamond polish, exactly what
kind of tool is used (I have an Engis (sp?) catalog around somewhere)
I'll read your post with the care that I read this one.

It's unfortunate in your push of Cimatron that you won't provide the
kind of specifics and attention to detail (for drilling holes) that
you have shown you can provide in this post. You criticize Cimatron
horrible marketing (rightly so) but yet you are guilty of exactly the
same kind of thing when it comes to describing Cimatron. There are
still a few people left in this world that are interested in the
important specifics rather than broad sweeping generalities such as
are most often posted about Siemens NX by Bill Triffet. There is
something very seriously wrong when I learn more on 3 minutes of a
sales presentation of NX than I have from many, many years of reading
posts on UG / NX from Bill Triffet.

Jon Banquer
San Diego, CA






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Relevant Pages

  • Re: Metal Finishing Questions
    ... years you basicaly have to learn how to "hide" surface imperfections, ... important specifics rather than broad sweeping generalities such as ... are most often posted about Siemens NX by Bill Triffet. ... Jihad. ...
    (alt.machines.cnc)
  • Re: Metal Finishing Questions
    ... years you basicaly have to learn how to "hide" surface imperfections, ... your mold that "wow" by the customer when they inspect it. ... are most often posted about Siemens NX by Bill Triffet. ... I don't feel I'm wasting time on him personally any more than wasting ...
    (alt.machines.cnc)