For generating helical gears by shaping, the cutter should be of helical gear type having hand opposite to that of the work piece. As the cutter and the work piece run on parallel axes to generate the necessary helicoidally involute shape on the work piece with the axial advancement of the cutter, it should rotate angularly in forward or reverse direction depending on the hand of the helix, and the amount of rotation for the given axial traverse will depend on the lead of helix to be cut. This is achieved by using a helical guide for the cutter spindle.
The hand of the helical guide should be the same as that of the cutter and opposite of the work piece helix hand. The other requirement is that the lead of the guide should be equal to the lead of the cutter.
The hand of the helical guide should be the same as that of the cutter and opposite of the work piece helix hand. The other requirement is that the lead of the guide should be equal to the lead of the cutter.
4 comments:
Thanks nick for the info. Now I have a question - if you can kindly help.
Can we cut just any helix angle on the gear blank or fixed angles can be done ?
A royc
Thanks for sharing with us
Malkar Industries Spur Gears, Worm Gears, Lead Screws,Serration Cutters, Helical Gears.
For a gear hobbing machine which is a theoretical involute, the fundamental rack is straight-sided, with sides inclined at the pressure angle of the tooth form, with flat top and bottom. The necessary addendum correction to allow the use of small-numbered pinions can either be obtained by suitable modification of this rack
gear hobbing machine finds its uses in lathe industries
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