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Letter 39002
Metal finish similar to grinding but
without using a grinding machine for metal plates
[India]
January 13, 2006
I have a problem with finishing metal plates, I require finish
similar to the one which is achived by grinding the metal (steel).
But without using grinding media (or grindnig machines). I have
already tried on a grinding machine, but the problem I faced with
those grding machines is that my metal plates got bend. These metal
plates are hardened and its an alloy steel. Also the grinding is not
cost effective. So I am looking for a solution for my problem, kindly
advise me few process where I can give finish (Bright Polish Finish
or Mirror Finish)to the metal plates similar to grinding, without
distorting the plates.
Regards,
Dhiman Chitalia
Consumer , Mfgr - Mumbai, India
First of three simultaneous responses -- January 13, 2006
Distortion comes from heat. Look for a mold polisher in your area.
Maybe he can help but it´s not going to be cheap as this is a
labor intensive job.
Guillermo Marrufo
Monterrey, NL, Mexico
Second of three simultaneous responses -- January 13, 2006
If your plate bent during grinding, you used the wrong wheel or
excessive pressure or no / wrong / inadequate coolant or the plate
was too thin to be ground or the plate was terribly highly stressed
and removing a thin layer of the surface relieved the stress on that
side.
Did you anneal (stress relieve) these plates after hardening??
James Watts
- FL
Third of three simultaneous responses -- January 14, 2006
How big are the parts LWH? Sounds like they are over 12"and thin.
If that is the case, you need to keep the parts stationary and rigid.
Meaning you don't have too many options. Probably need to grind them,
but maybe a wide belt system could achieve results. What type of
machine are you using?
First of two simultaneous responses -- February 27, 2006
Have you tried etching?
Ed Hernandez
- Los Angeles, CA, USA
Second of two simultaneous responses -- February 27, 2006
Howdy!
Just starting a Metal Art Studio & have three questions. 1. The
metal (thin metal 304SS- .107 & .093 thick) I'm working with, it
will bow (only on weld spots) when I weld small tacks on back of the
art piece, what can I do to reduce the problem. 2. I am sanding the
art pieces with a 6"X 48" belt sander to get the flat 12" X 8"
Stainless Steel straight. That also leaves me with indentions/groves
on the part that hangs over the 6"X48" sander when I run the piece
over it to smooth out the bows, what other alternatives tools &
methods can I use? 3. Can you give me a specific high speed hand held
rotary tool name, sanding grits & styles to make small 1" machine
swirls on my flat 12" X 8" 304 SS?
Sincerely,
Johnny O Aguilar
metal art studio - Houston, TX, US
March 2, 2006
This answer is for John's last question, which is related to the
first question.
Your indentation problem might be solve with either trying a
non-woven belt or using a wider belts system with a soft backing.
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