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Posted by Sierevello@aol.com on May 6, 2006, 8:31 pm
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Can anyone offer advice on how to do this properly? I have a rotary
table and tailstock to index the shaft for cutting the splines. How do
I get the correct form on the hand ground tool? Also, should I use my
boring head to hold the form tool? I can just move the table in the Y
axis to control depth.
Also, are there any pages out on the net that show how to do this? I
googled and could not find any.
Thanks, Steve
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Posted by Grant Erwin on May 6, 2006, 8:39 pm
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Sierevello@aol.com wrote:
> Can anyone offer advice on how to do this properly? I have a rotary
> table and tailstock to index the shaft for cutting the splines. How do
> I get the correct form on the hand ground tool? Also, should I use my
> boring head to hold the form tool? I can just move the table in the Y
> axis to control depth.
>
> Also, are there any pages out on the net that show how to do this? I
> googled and could not find any.
I'm a little puzzled as to what you mean by "straight splines", Steve. Are these
like keyway slots but the whole length of the shaft, or is there some angle to
the sides, or what?
GWE
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Posted by Sierevello@aol.com on May 6, 2006, 9:52 pm
Please log in for more thread options Grant...These are like straight splines on an axle shaft.
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Posted by c.henry on May 7, 2006, 7:17 pm
Please log in for more thread options Sierevello@aol.com wrote:
> Grant...These are like straight splines on an axle shaft.
>
we have done this in the shop , we rough out the groove then finish one
side at a time , with bits ground up for us by our resident wiley old
machinist, for some splines we have bought cutters of the correct form
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Posted by Harold and Susan Vordos on May 7, 2006, 5:52 pm
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> Can anyone offer advice on how to do this properly? I have a rotary
> table and tailstock to index the shaft for cutting the splines. How do
> I get the correct form on the hand ground tool? Also, should I use my
> boring head to hold the form tool? I can just move the table in the Y
> axis to control depth.
>
> Also, are there any pages out on the net that show how to do this? I
> googled and could not find any.
>
> Thanks, Steve
>
Real easy, Steve. Hand grind the desired profile on your tool, but keep in
mind that it must be able to be properly oriented when you put it to work,
so it is centered and at the proper angle as it relates to the shaft being
machined. A boring head might be too restrictive in that regard, whereas a
fly cutter with a slot would be more user friendly. Considering you will
control the depth of cut by means beyond the holding device, an adjustable
head is not really needed, and will help in rigidity if it can be avoided.
That's often a serious consideration when using a form tool of the magnitude
of a spine cutter.
Keep clearance and rake in mind when grinding your tool. If you grind
positive rake, it will have an effect on the profile of the tool, albeit a
small one. If you have access to a comparator, it helps to achieve the
proper profile of the cutting tool. If you have the mating part, it can be
used for the profile gauge, assuming you're able to get the cutting tool
inside.
An indexing head might be more convenient than a rotab, but the degrees of
indexing required may eliminate that possibility. This would be no
different from fly cutting a spur gear.
Good luck!
Harold
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> table and tailstock to index the shaft for cutting the splines. How do
> I get the correct form on the hand ground tool? Also, should I use my
> boring head to hold the form tool? I can just move the table in the Y
> axis to control depth.
>
> Also, are there any pages out on the net that show how to do this? I
> googled and could not find any.