Subject: Re: Can a lathe bed be built up instead of ground down?

From: [email-masked] (Jonathan M. Elson)
Date: 13 Dec 1996 05:56:22 GMT

Tom Kruesel ([email-masked]) wrote:
: Please enlighten me:  What exactly is the process of "flame spraying" 
: involve?  I've seen it mentioned lots, but never explained.

: On 7 Nov 1996, Jonathan M. Elson wrote:
: > Fitch R. Williams ([email-masked]) wrote:
: > : I have read several posts related to regrinding a lathe bed to remove
: > : wear.  My question is, is there some way to build it back up so that
: > : the side effects don't become so bothersome?  
: > 
: > : For example, could one be flame sprayed to build it back up the few
: > : thousands it needs and then regound back to stock or close enough
: > : dimensions?
: > 
: > I've certainly heard of people diong this.  You get a VERY hard bed, too.
: > 

Flame spraying is a metal treatment process.  Any metal treatment shop
will have heard of it, although not all shops have the equipment to do
it.  A flame, similar to an Oxy-Acetylene flame is used, but a fine dust
of metal and or abrasive particles are introduced into the flame.  The
flame heats the base metal, and the particles may or may not melt, but
adhere to the base metal, as the force of the flame drives the particles
onto the surface of the metal.  'Hard Cladding' and many other tradenames
for hardened machine tool beds are done this way at the factory, not to
repair worn spots, but to harden the surface of the ways with a different
metal alloy.  The process can definitely build up surfaces, however, and
is often used to repair worn shafts, rollers, blades and similar parts.
It is also used to make abrasive surfaces on plain metal parts.

					Jon

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From: Tom Kruesel <[email-masked]>
Date: Thu, 12 Dec 1996 17:08:58 -0600

Please enlighten me:  What exactly is the process of "flame spraying" 
involve?  I've seen it mentioned lots, but never explained.

Thanks

Tom

On 7 Nov 1996, Jonathan M. Elson wrote:

> Fitch R. Williams ([email-masked]) wrote:
> : I have read several posts related to regrinding a lathe bed to remove
> : wear.  My question is, is there some way to build it back up so that
> : the side effects don't become so bothersome?  
> 
> : For example, could one be flame sprayed to build it back up the few
> : thousands it needs and then regound back to stock or close enough
> : dimensions?
> 
> I've certainly heard of people diong this.  You get a VERY hard bed, too.
> 
> 
>

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From: [email-masked]
Date: 13 Dec 1996 16:40:28 GMT

In article
<[email-masked]>,

>involve?  I've seen it mentioned lots, but never explained.

Saying you *like* Chinese lathes.

Peter

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From: [email-masked]
Date: 13 Dec 1996 19:17:23 GMT

Flame spraying is also known as "Hard Chroming",
it is a heat surfacing process, it is often used
in machine rebuilding & jewelry.

Alberto

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From: [email-masked]
Date: 14 Dec 1996 15:52:07 GMT

>in machine rebuilding & jewelry.

Don't want to get into a war over this Alberto but flame spraying is *not*
hard chroming. Perhaps you mean Hard Cladding.

Flame spraying is as described by Jon, and hard chroming is electroplated
on in a chrome bath to deposit layers of chrome that can be later ground
back to a specific size or shape. It is mostly used to build up worn
surfaces on shafts etc.

Some mills have it on the ways too. 

Peter

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From: [email-masked]
Date: 15 Dec 1996 02:11:26 GMT

Peter:

I am shure you are probably correct, but in my Spanish English
technical dictionary it says so, never mind I made good note
of your comments. And thank you for putting me right !!! 

Translation is a difficult beast, most of the time and I have
to cope with three languages all the time.

Alberto

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From: [email-masked] (Scott Logan)
Date: Sun, 15 Dec 1996 13:10:09 GMT

>to cope with three languages all the time.

And for the most part, your English as is good or better than some of
the "natives."  Don't feel ashamed.

  +----------------------------------+
  | Scott Logan  -  [email-masked] |
  |        Logan Actuator Co.        |
  |     http://www.loganact.com      |
  |    Repair Parts & Accessories    |
  |    for Logan and Wards Lathes    |
  +----------------------------------+

FAQ - http://plains.uwyo.edu/%7Emetal/index.html
Metal Web News - http://www.ten.k12.tn.us/~wgray

        "Measure Twice, Cut Once"

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From: [email-masked]
Date: 15 Dec 1996 17:34:43 GMT

>to cope with three languages all the time.

I envy your ability to do so. I'm way too busy (read lazy) to learn
Italian as I love visiting there and would like to speak the lingo better.

Peter

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From: [email-masked] (Fitch R. Williams)
Date: Mon, 16 Dec 1996 03:02:20 GMT

>Alberto

You are doing great!  I am occasionaly outwitted by only one
language.

Fitch