Posted by BillS on January 09, 2010 at 17:28:13:
In Reply to: Tilting head mechanism for manufacturing spiral bevel gears posted by Cevat Ceyhun on January 09, 2010 at 05:56:30:
Interesting question, Cevat.
I just finished a Unitool Program (a Gleason method) that uses cutter tilt and a table that shows machine settings for an amount of cutter tilt. It seems that swivel angle must be changed when cutter tilt is used.
In your example, I think that you would want 2 degrees of cutter tilt (20 -18), and according to the table that corresponds to:
alpha = 86D 18M
Ix = 7D 40M
I haven't produced the formula(s) that reproduce the table yet, so I can only look up the numbers (the Unitool program has the table coded in).
Ix, if I understand the machine setting, is the rotation of the cutter spindle about the cutter tilt axis, which is inclined at 15 deg to the machine centerline.
I don't understand alpha angle. It is described as "one of the components of this (tilt) setting".
Maybe someone with hands-on cutter tilt experience can add some info?
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