Re: [CAD_CAM_EDM_DRO] Buying or CNCing some odd angle bevel gears. I'm stuck !!

Are these gears the same size? If so, why not cheap out with one or two
universal joints? There are zero backlash versions out there.....

Bill

On Sun Jan 13 10:36:13 2002, Marcus & Eva, <implmex@...> wrote:

>Hi Ray:
> Good suggestion but with a couple of caveats.
>There aren't too many wire EDM's out there that can handle such extreme
>tapers.
>Charmilles is the only one I know of.
>The programming will be EXPENSIVE!!!!
>If you can do it yourself you will save a bundle, but you need access to the
>right software.
>The gears will be the most accurate you will ever see, but the surface
>created by the EDM process is a poor surface for wear.
>The EDM process also creates a recast layer and a heat affected zone; the
>recast layer is typically full of microcracks which can propagate and lead
>to early failure of the gear.
>The most modern power supplies can minimise the recast; look for a high end
>machine less than 3 years old.
>You will still have the other problems to overcome.
>
>I'd cut them with a flycutter using the parallel tooth method on a milling
>machine.
>Cheers
>
>Marcus
>
>
>
>
>----- Original Message -----
>From: "Raymond Heckert" <jnr@...>
>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
>Sent: Saturday, January 12, 2002 11:12 PM
>Subject: Re: [CAD_CAM_EDM_DRO] Buying or CNCing some odd angle bevel gears.
>I'm stuck !!
>
>
>> kaynrc:
>>
>> I'd guess the "odd" gears would be ideally suited for 3-D EDM wirecutting,
>> if you don't need something "too" precision. You'll need to supply
>> whatever pressure angle you're working with, and the pitch, but the modern
>> machines ought to be able to produce what would pass for an involute form.
>> Maybe locate a Tech School where they teach EDM Machining, and try to get
>> one of the students to have a go at it. It's (drawing on Tech-School
>> resources) commonly done here, stateside.
>>
>> Best regards, Ray H
>
>
>
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