Influence of Position of Moving Parts of Lathe on Dynamic Characteristics

DOI

10.2991/aime-18.2018.26How to use a DOI?

Keywords

lathe, dynamic model, rubber-metal support, stiffness, own frequency, form of oscillations

Abstract

A technique and a dynamic model for calculating the own frequencies and forms of oscillations of a lathe with a horizontal plane of guides mounted on rubber-metal supports are proposed. A two-mass dynamic model with 3 degrees of freedom was used, which performs translational-angular oscillations. The mass, formed from the masses of the base, the bed, the headstock and the tailstock, performs both translational and angular vibrations. The mass of the support group performs only translational vertical vibrations. The dynamic model allows to take into account the asymmetric layout of the lathe and the redistribution of the static load on the rubber-metal supports due to the movements of the machine nodes during shaping and adjustment. Based on the processing of the experimental data, a nonlinear dependence of the rigidity of the rubber-metal support on the axial load as a polynomial of the third degree is obtained. The carried out approbation of the proposed technique showed that for longitudinal displacement of the support group, the variation of the second and third own frequencies can reach 3.5%. The increase in the weight of the support group when the machine is equipped with a multi-position turret increases the range of variation of own frequencies to 5.2%. It is shown that the third own frequency has the greatest influence on the accuracy of processing short blanks, and the second and third own frequencies affect the accuracy of processing long blanks

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Alexander Denisenko
PY  - 2018/04
DA  - 2018/04
TI  - Influence of Position of Moving Parts of Lathe on Dynamic Characteristics
BT  - Proceedings of the International Conference "Actual Issues of Mechanical Engineering" (AIME 2018)
PB  - Atlantis Press
SP  - 134
EP  - 138
SN  - 2352-5401
UR  - https://doi.org/10.2991/aime-18.2018.26
DO  - 10.2991/aime-18.2018.26
ID  - Denisenko2018/04
ER  -