Open AccessSPECIAL TAP FOR CUTTING INTERNAL SMALL-SIZED THREADS
Author(s) -
I. P. Nikitina,
I. P. Nikitina,
А. С. Поляков,
A. N. Polyakov
Publication year - 2019
Publication title -
vestnik bgtu im. v.g. šuhova
Language(s) - English
Resource type - Journals
ISSN - 2071-7318
DOI - 10.34031/article_5d4d674f73d7a2.60224643
Subject(s) - thread (computing) , design for manufacturability , rigidity (electromagnetism) , mechanical engineering , vibration , engineering , structural engineering , computer science , engineering drawing , acoustics , physics
The paper presents the original design of a special tap for cutting precise threads. Distinctive design features of the tap are: the presence of the rear threaded guide that together with the copier threaded sleeve device perceives the axial forces and provides the tap axial feed strictly corresponding to the step of the thread being cut, excluding its breaking under the action of axial forces; the presence of a smooth front guide part with the direction on the cut hole, to reduce the influence of radial forces leading to the breakdown of the thread due to radial vibrations of the tap; the presence of the chamfer that implements the most technological cutting scheme such as flank infeed. A prototype of a special tap made on a turning and milling machine tool is presented, confirming the manufacturability of the proposed tool design. Research conducted in the field of engineering analysis with the CAE system Ansys shows a significant increase in structural rigidity and in natural frequencies.