Re: [CAD_CAM_EDM_DRO] Re: Gear milling

Hi all
i am gear specialist. in gear tooth profile.
it is not whole round. it is special radius. radius is varying every point
of tooth.i think it known as hypoide.

shabbir



At 09:31 PM 10/2/01 +0100, you wrote:

>Why not just use your cnc equipment to make a fly cutter with a suitable
>profile? If the gear is not too big and is in a fairly soft material
>(aluminium, brass etc.) you can even make the fly cutter by turning the
>profile on the end of a bar and then filing down to half thickness.
>Otherwise, make a disc cutter by turning the profile on the edge of a disc
>of tool steel, cut a notch out of one side and then mount the disc off
>centre so the notch is furthest away from the spindle. This will give the
>necessary relief.
>
> ______
> ( )
> _____( ) excuse the hopeless ASCII
>( O ) art but the cutting face is the flat
> ( ) bit on the left and its rotating
> ( ________) clockwise about the 'O'
>
>Ian
>--
>Ian W. Wright
>Sheffield UK
>www.iw63.freeserve.co.uk
>----- Original Message -----
>From: <npalen@...>
>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
>Sent: 02 October 2001 03:18
>Subject: [CAD_CAM_EDM_DRO] Re: Gear milling
>
>
>> --- In CAD_CAM_EDM_DRO@y..., machines@n... wrote:
>> > --- In CAD_CAM_EDM_DRO@y..., smoke@t... wrote:
>> > > Anyone know of a SIMPLE program (possibly a plug in?) for
>> > generating
>> > > drawings of gears so's I can generate some g code for milling
>> them?
>> > >
>> > Smoke,
>> > Unless these are big gears how are you going to get a tool into the
>> > gear shape?
>> > Most of the gear generating programs are for wire eroders. Milling
>> > with small cutters won't give you a deep enough face width.
>> > There is a program here:-
>> > http://www.simtel.net/pub/pd/41862.shtml
>> > This will even generate the G code for you, or save as a DXF file,
>> > but beware they are large files as it's all small moves.
>> >
>> > John Stevenson
>>
>> A possible solution for making gears for low speed applications would
>> be laminating with rivets, screws etc. several thin gears machined
>> out of sheet metal. The X and Y milling coordinates would generate
>> the profile of the teeth around the periphery. The thin sheet metal
>> would allow use of a small enough endmill diameter for a given tooth
>> pitch as well as the keyslot. Machinery's Handbook should give tooth
>> profiles which can be
>> circular arrayed in a CAD program and dxf'd out for G-coding.
>> Nelson Palen
>>
>>
>>
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>
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