Modelling the dynamic behaviour of a ballscrew system taking into account the changing position of the ballscrew nut

G. Holroyd, S. Fletcher, A. Myers

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

An understanding of the dynamic characteristics of a machine tool is a vital element in the control of the machine which has a direct affect on the precision of the machining which can be undertaken. The torsional behaviour of the motor, coupling drive (belt, chain, gear or direct) and ballscrew coupled with the axial movement of the table or saddle and the ballscrew nut have the most direct effect on machining accuracy. Nevertheless transverse dynamic movement of drive system components can have an affect on machine performance and system component life especially if vibration problems occur. This paper discusses the development of an approach to investigating the dynamic characteristics of an axis drive on a CNC milling machine in which all six degrees of freedom are taken into consideration. The mechanical elements of the drive are modelled as point inertias coupled by springs and dampers. The ways in which energy is dissipated, such as friction and damping, also are taken into account. The solution technique includes a series method which can cope with non-linearities in the stiffness and damping behaviour of the system components as well as the changes in the relative orientation of parts of the machine as a duty cycle unfolds. Comparison with measurements taken from a ballscrew test rig demonstrate some of the capabilities of the method.

Original languageEnglish
Title of host publicationLaser Metrology and Machine Performance VII
Subtitle of host publication7th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance, LAMDAMAP 2005
EditorsPaul Shore
Publishereuspen
Pages148-158
Number of pages11
ISBN (Print)9781861941183, 1861941188
Publication statusPublished - 2005
Event7th International Conference and Exhibition on Laser Metrology, CMM and Machine Tool Performance - Cranfield, United Kingdom
Duration: 27 Jun 200530 Jun 2005
Conference number: 7
https://www.scimagojr.com/journalsearch.php?q=21100338313&tip=sid&clean=0

Conference

Conference7th International Conference and Exhibition on Laser Metrology, CMM and Machine Tool Performance
Abbreviated titleLAMDAMAP 2005
CountryUnited Kingdom
CityCranfield
Period27/06/0530/06/05
Internet address

Fingerprint

Machining
Damping
machining
dynamic characteristics
Belt drives
Milling machines
damping
milling machines
Machine tools
machine tools
Gears
saddles
dampers
Stiffness
inertia
Friction
stiffness
friction
degrees of freedom
nonlinearity

Cite this

Holroyd, G., Fletcher, S., & Myers, A. (2005). Modelling the dynamic behaviour of a ballscrew system taking into account the changing position of the ballscrew nut. In P. Shore (Ed.), Laser Metrology and Machine Performance VII: 7th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance, LAMDAMAP 2005 (pp. 148-158). euspen.
Holroyd, G. ; Fletcher, S. ; Myers, A. / Modelling the dynamic behaviour of a ballscrew system taking into account the changing position of the ballscrew nut. Laser Metrology and Machine Performance VII: 7th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance, LAMDAMAP 2005. editor / Paul Shore. euspen, 2005. pp. 148-158
@inproceedings{8d817402b6b1444cb188208a9df2ee86,
title = "Modelling the dynamic behaviour of a ballscrew system taking into account the changing position of the ballscrew nut",
abstract = "An understanding of the dynamic characteristics of a machine tool is a vital element in the control of the machine which has a direct affect on the precision of the machining which can be undertaken. The torsional behaviour of the motor, coupling drive (belt, chain, gear or direct) and ballscrew coupled with the axial movement of the table or saddle and the ballscrew nut have the most direct effect on machining accuracy. Nevertheless transverse dynamic movement of drive system components can have an affect on machine performance and system component life especially if vibration problems occur. This paper discusses the development of an approach to investigating the dynamic characteristics of an axis drive on a CNC milling machine in which all six degrees of freedom are taken into consideration. The mechanical elements of the drive are modelled as point inertias coupled by springs and dampers. The ways in which energy is dissipated, such as friction and damping, also are taken into account. The solution technique includes a series method which can cope with non-linearities in the stiffness and damping behaviour of the system components as well as the changes in the relative orientation of parts of the machine as a duty cycle unfolds. Comparison with measurements taken from a ballscrew test rig demonstrate some of the capabilities of the method.",
keywords = "Ball screws, Machine tools, Screw drives",
author = "G. Holroyd and S. Fletcher and A. Myers",
year = "2005",
language = "English",
isbn = "9781861941183",
pages = "148--158",
editor = "Paul Shore",
booktitle = "Laser Metrology and Machine Performance VII",
publisher = "euspen",

}

Holroyd, G, Fletcher, S & Myers, A 2005, Modelling the dynamic behaviour of a ballscrew system taking into account the changing position of the ballscrew nut. in P Shore (ed.), Laser Metrology and Machine Performance VII: 7th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance, LAMDAMAP 2005. euspen, pp. 148-158, 7th International Conference and Exhibition on Laser Metrology, CMM and Machine Tool Performance, Cranfield, United Kingdom, 27/06/05.

Modelling the dynamic behaviour of a ballscrew system taking into account the changing position of the ballscrew nut. / Holroyd, G.; Fletcher, S.; Myers, A.

Laser Metrology and Machine Performance VII: 7th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance, LAMDAMAP 2005. ed. / Paul Shore. euspen, 2005. p. 148-158.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Modelling the dynamic behaviour of a ballscrew system taking into account the changing position of the ballscrew nut

AU - Holroyd, G.

AU - Fletcher, S.

AU - Myers, A.

PY - 2005

Y1 - 2005

N2 - An understanding of the dynamic characteristics of a machine tool is a vital element in the control of the machine which has a direct affect on the precision of the machining which can be undertaken. The torsional behaviour of the motor, coupling drive (belt, chain, gear or direct) and ballscrew coupled with the axial movement of the table or saddle and the ballscrew nut have the most direct effect on machining accuracy. Nevertheless transverse dynamic movement of drive system components can have an affect on machine performance and system component life especially if vibration problems occur. This paper discusses the development of an approach to investigating the dynamic characteristics of an axis drive on a CNC milling machine in which all six degrees of freedom are taken into consideration. The mechanical elements of the drive are modelled as point inertias coupled by springs and dampers. The ways in which energy is dissipated, such as friction and damping, also are taken into account. The solution technique includes a series method which can cope with non-linearities in the stiffness and damping behaviour of the system components as well as the changes in the relative orientation of parts of the machine as a duty cycle unfolds. Comparison with measurements taken from a ballscrew test rig demonstrate some of the capabilities of the method.

AB - An understanding of the dynamic characteristics of a machine tool is a vital element in the control of the machine which has a direct affect on the precision of the machining which can be undertaken. The torsional behaviour of the motor, coupling drive (belt, chain, gear or direct) and ballscrew coupled with the axial movement of the table or saddle and the ballscrew nut have the most direct effect on machining accuracy. Nevertheless transverse dynamic movement of drive system components can have an affect on machine performance and system component life especially if vibration problems occur. This paper discusses the development of an approach to investigating the dynamic characteristics of an axis drive on a CNC milling machine in which all six degrees of freedom are taken into consideration. The mechanical elements of the drive are modelled as point inertias coupled by springs and dampers. The ways in which energy is dissipated, such as friction and damping, also are taken into account. The solution technique includes a series method which can cope with non-linearities in the stiffness and damping behaviour of the system components as well as the changes in the relative orientation of parts of the machine as a duty cycle unfolds. Comparison with measurements taken from a ballscrew test rig demonstrate some of the capabilities of the method.

KW - Ball screws

KW - Machine tools

KW - Screw drives

UR - http://www.scopus.com/inward/record.url?scp=84908290654&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84908290654

SN - 9781861941183

SN - 1861941188

SP - 148

EP - 158

BT - Laser Metrology and Machine Performance VII

A2 - Shore, Paul

PB - euspen

ER -

Holroyd G, Fletcher S, Myers A. Modelling the dynamic behaviour of a ballscrew system taking into account the changing position of the ballscrew nut. In Shore P, editor, Laser Metrology and Machine Performance VII: 7th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM and Robotic Performance, LAMDAMAP 2005. euspen. 2005. p. 148-158