DIY Induction heater for shrinker endmill holders?

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DIY Induction heater for shrinker endmill holders? rpseguin 04-24-2008
Posted by Cliff on May 7, 2008, 5:36 am
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wrote:

>They avoid heating the tool by heating the holder so fast that heat doesn't
>have a chance to conduct in to the tool shank. If it does, you're a dead
>duck when you try to get the tool out.

Full round pilger mill dies are also fitted to their shafts
with induction heating.
And removed <g>.
Wise to use some good high-temp anti-seize compound IIRC.
Don't forget that even after you turn off the power heat
will continue to flow from hot areas to cold ones.
--
Cliff

Posted by Winston on May 1, 2008, 10:09 pm
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Ed Huntress wrote:

(...)

> All of which is OK if you're planning on making a permanent toolholder/tool
> assembly. d8-)

Thanks, Ed.

I was completely unaware of that.

--Winston

Posted by on May 1, 2008, 10:57 pm
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On Thu, 1 May 2008 20:47:20 -0400, "Ed Huntress"

>All of which is OK if you're planning on making a permanent toolholder/tool
>assembly. d8-)

http://www.ameritherm.com/overview_shrinkfit.php

A lot of good free information available however to get the more
detailed technical data you be asked to fill out a form with your
contact information.

http://www.cihinduction.com/reheating.htm

Tom

Posted by Ed Huntress on May 1, 2008, 11:16 pm
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> On Thu, 1 May 2008 20:47:20 -0400, "Ed Huntress"
>
>>All of which is OK if you're planning on making a permanent
>>toolholder/tool
>>assembly. d8-)
>
> http://www.ameritherm.com/overview_shrinkfit.php
>
> A lot of good free information available however to get the more
> detailed technical data you be asked to fill out a form with your
> contact information.
>
> http://www.cihinduction.com/reheating.htm
>
> Tom

That's good info for making a permanent shrink fit, but the trick with the
tooling application is getting the tool out of the holder when you want to
change tools. It's difficult.

I should point out that it's easy with carbide tool shanks, but very
difficult with steel, because of carbide's lower coefficient of thermal
expansion.

--
Ed Huntress



Posted by on May 1, 2008, 11:38 pm
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On Thu, 1 May 2008 23:16:34 -0400, "Ed Huntress"

>
>> On Thu, 1 May 2008 20:47:20 -0400, "Ed Huntress"
>>
>>>All of which is OK if you're planning on making a permanent
>>>toolholder/tool
>>>assembly. d8-)
>>
>> http://www.ameritherm.com/overview_shrinkfit.php
>>
>> A lot of good free information available however to get the more
>> detailed technical data you be asked to fill out a form with your
>> contact information.
>>
>> http://www.cihinduction.com/reheating.htm
>>
>> Tom
>
>That's good info for making a permanent shrink fit, but the trick with the
>tooling application is getting the tool out of the holder when you want to
>change tools. It's difficult.
>
>I should point out that it's easy with carbide tool shanks, but very
>difficult with steel, because of carbide's lower coefficient of thermal
>expansion.

Not expecting the OP to use that page for his shrink fit, just passing
along a source for information.

They have a lot of free information, videos, technical data, theory,
application & How To's, including for this OP how to design coils, but
he will have to navigate the site to find them all.

Tom

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