Re: [CAD_CAM_EDM_DRO] Re: Hardinge Conversions

I haven't the faintest idea of the constructin of the machine you guys are
talking about, but if it has steel ways, I'd make the wear plates from
stress relieved cast iron. machining is easy and you won't have the warp
problem. Cast iron on steel has been an industrial "mainstay" for many many
many many years! Just be sure to put in some grease/oil grooves and an easy
method of getting lube to the grooves. You should be able to buy cast iron
sections suitable for machining to the shape you require.

Smoke

>Hi Dave:
> Your comments on bronze caught my attention.
>I've used Aluminum bronze on injection mold slide rails and wear plates.
>It wears very well and won't pick up, but it's the devil's own to try to
>machine accurately.
>It warps all over the place, and doesn't surface grind worth a damn.
>I always had the best success bolting the plates into position and then
>flycutting them to final size.
>I can just imagine the stresses imposed by these parts if they were part of
>a machine slide.
>Linear bearings are the way to go.
>Cheers
>
>Marcus
>-----Original Message-----
>From: dave engvall <dengvall@...>
>To: CAD_CAM_EDM_DRO@yahoogroups.com <CAD_CAM_EDM_DRO@yahoogroups.com>
>Date: Friday, April 20, 2001 9:01 AM
>Subject: Re: [CAD_CAM_EDM_DRO] Re: Hardinge Conversions
>
>
>>Joe and list,
>>Since advice is cheap....
>>
>>Making the bulk parts out of hardened steel is
>>overkill. Only when you bump up against the yield
>>point does all that strength do any good.
>>If I were to try to do something fancy...really
>>fancy I would cast (iron) the big parts. Actual
>>slide contact parts would be something like A10 or
>>O6 ( because of the spherodized carbon content)
>>hardened and ground.
>>
>>I would stay away from cold drawn because of the
>>stresses caused by drawing.
>>
>>I often think about bronze for one side of slides
>>but that may not be practical as you don't see it
>>on commercial gear.
>>
>>It is easy to dream when one is not responsible
>>for the construction.
>>
>>Good Luck,
>>
>>Dave
>
>
>
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