TECHNOLOGICAL FIXTURES FOR MACHINING LARGE-SIZED THIN-WALLED SHELLS OF COMPLEX PROFILE

Authors

  • Oliinyk Svitlana Donbass State Engineering Academy, Kramatorsk, Ukraine
  • Kalafatova Lydmila Donetsk National Technical University, Pokrovsk, Ukraine

DOI:

https://doi.org/10.20998/2078-7405.2021.94.04

Keywords:

thin-walled shell, pyroceram, diamond grinding, technological system, structure of fixture - mandrel, vibrations, natural vibration frequency

Abstract

The paper analyzes the structure of technological fixtures for the positioning and fixing of large-sized thin-walled pyroceram shells as a factor affecting the dynamic characteristics of the grinding system. The solution to the problem of ensuring the dynamic stability of the «mandrel-workpiece» subsystem is necessary to increase the efficiency of shell machining in present conditions. Studying the vibrations frequency spectrum of the technological system during grinding has made it possible to determine their sources. The magnitude and frequency of vibrations depend on the mandrel structure - the clamping fixture. The study results are the requirements for a new mandrel structure, considering the dynamic stability of the technological system.

Author Biographies

Oliinyk Svitlana, Donbass State Engineering Academy, Kramatorsk

Candidate of Technical Sciences, Donbass State Engineering Academy, Senior Lecturer, Department of Engineering Technology, Kramatorsk, Ukraine

Kalafatova Lydmila, Donetsk National Technical University, Pokrovsk

Doctor of Technical Sciences, Professor, Donetsk National Technical University, Professor of Applied Mechanics Department, Pokrovsk, Ukraine

References

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Oliinyk, S.Yu. & Kalafatova, L.P. (2020). Analiz skhemy obrobky skladnoprofilnykh obolonok obertannia [Analysis of the machining scheme of complex-profiles shells of rotation]. Rizannia ta instrumenty v tekhnolohichnykh systemakh - Cutting & Tools in Technological System, no 92, pp.122-135. Retrieved from http://rits.khpi.edu.ua/article/view/2078-7405.2020.92.13.

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Suzdal'cev E. I., Haritonov D. V. & Suslova M. A. (2007). Ustrojstvo dlya mekhanicheskoj obrabotki krupnogabaritnyh slozhnoprofil'nyh keramicheskih izdelij [Device for machining of large-sized complex-shaped ceramic products]. Patent RF. No 2313438

Zunmin Geng (2010). Adaptive design of fixture for thin-walled shellacylndrical components. Patent US. No 2010/0164187

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Published

2021-06-16

Issue

No. 94 (2021): Cutting and Tools in Technological Systems

Section

Mechanical processing of materials, the theory of cutting materials, mathematical and computer simulation of machining p

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