Theoretical justification of regulation of borrowing submission for handling holes

Authors

  • M. B. Klendii Separate department of the National University of Life and Environmental Sciences of Ukraine "Nizhyn Agrotechnical Institute" , Відокремлений підрозділ національного університету біоресурсів і природокористування України «Бережанський агротехнічний інститут» http://orcid.org/0000-0001-8271-5381 (unauthenticated)
  • M. I. Klendii Separate department of the National University of Life and Environmental Sciences of Ukraine "Nizhyn Agrotechnical Institute" , Відокремлений підрозділ національного університету біоресурсів і природокористування України «Бережанський агротехнічний інститут» http://orcid.org/0000-0003-0762-7992 (unauthenticated)
  • R. V. Shatrov National University of Life and Environmental Sciences of Ukraine image/svg+xml http://orcid.org/0000-0002-3596-0146 (unauthenticated)

DOI:

https://doi.org/10.31548/machenergy2019.04.085

Keywords:

feed, hole, axial force, drilling.

Abstract

The purpose of the study is to substantiate the need to change the feed of the drill at its exit from the part taking into account the rigidity of the vertical-drilling machines, the physical and mechanical properties of the workpiece material, sharpening drills and more. The object of the study is the technological process of drilling through holes on machines with mechanical feed. The subject of the study is the regularity of the process of drilling through holes and the influence of cutting modes on them.
The paper presents theoretical dependencies for the purpose of feeding depending on the diameters of the drills used, the determination of the zone from which it is necessary to reduce the flow, the determination of the values of the axial force when drilling the hole.
Theoretical dependences were obtained to determine the values of the machine feeds, depending on the diameter of the drill, taking into account various restrictions, namely: the stability and strength of the drills, the strength of the machine feed mechanism, as well as to determine the size of the zone of production, when reaching the drill which must reduce the flow.
Results: It is found that to increase the operational reliability of the drill bits and to protect them from breakage, it is necessary to automatically reduce the feed size at the outlet of the tool.

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Published

2020-01-30

Issue

No. 10(4) (2019)

Section

Статті

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