Abstract
The paper presents a new method of worms processing on NC lathes, using end mills. The authors denote ZPA this new type of worm. It presents the enveloping calculus for determining the contact line between the tool and the flank of the worm and also the calculus for determining the axial profile obtained for the worm. As an example, the paper indicates the deviation of the axial profile of ZPA against to the ZA profile. Due to the manufacturing possibilities offered by an Okuma Multus NC lathe, the paper indicates milling settings in order to process an Archimedes worm using end mills. The main advantages of this new worm generation method are: (1) use of standard end mills with reduced costs; (2) short processing time of worm.
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