October
14
2015
Written by  Erika

Experimental validation of appropriate axial immersions for helical mills

 

The forced periodic vibrations of milling processes with helical tools are modelled and analysed. By means of analytical and numerical techniques, the so-called superchart of milling is constructed that includes the conventional stability chart with the stability lobes and also the amplitudes of the stable forced vibrations, which is correlated to many surface quality numbers like surface location error, surface waviness and surface roughness. The existences of trivial and non-trivial appropriate axial immersions are presented for a single degree of freedom mechanical model of the machine tool structure. At these appropriate axial immersion parameters, if the cutting is stable, the surface quality parameters will be also optimal even in those spindle speed domains where the system is near to resonance and the cutting efficiency is high. Experiments are performed with a large industrial milling machine using a flexible test rig with an essential flexibility in one direction. The calculated and the measured forced vibration signals in the stable domains of the stability chart are in good correlation, which validates the simple analytical predictions for the non-trivial appropriate axial immersion parameters.

ORIGINAL ARTICLE

DOI: 10.1007/s00170-015-7748-0

Cite this article as:
Bachrathy, D., Munoa, J. & Stepan, G. Int J Adv Manuf Technol (2016) 84: 1295. doi:10.1007/s00170-015-7748-0

 

 

 

 

 

 

ORIGINAL ARTICLE

The International Journal of Advanced Manufacturing Technology

May 2016, Volume 84, Issue 5, pp 1295-1302

First online: 15 September 2015

 

Abstract

The forced periodic vibrations of milling processes with helical tools are modelled and analysed. By means of analytical and numerical techniques, the so-called superchart of milling is constructed that includes the conventional stability chart with the stability lobes and also the amplitudes of the stable forced vibrations, which is correlated to many surface quality numbers like surface location error, surface waviness and surface roughness. The existences of trivial and non-trivial appropriate axial immersions are presented for a single degree of freedom mechanical model of the machine tool structure. At these appropriate axial immersion parameters, if the cutting is stable, the surface quality parameters will be also optimal even in those spindle speed domains where the system is near to resonance and the cutting efficiency is high. Experiments are performed with a large industrial milling machine using a flexible test rig with an essential flexibility in one direction. The calculated and the measured forced vibration signals in the stable domains of the stability chart are in good correlation, which validates the simple analytical predictions for the non-trivial appropriate axial immersion parameters.

Keywords

Milling Chatter Machined surface quality Helical tool Appropriate axial immersion
 
Title
Experimental validation of appropriate axial immersions for helical mills
Journal
The International Journal of Advanced Manufacturing Technology 
Volume 84, Issue 5-8 , pp 1295-1302 

Cover Date
2016-05
DOI
10.1007/s00170-015-7748-0
Print ISSN
0268-3768
Online ISSN
1433-3015
Publisher
Springer London
Additional Links
Topics
Keywords
  • Milling
  • Chatter
  • Machined surface quality
  • Helical tool
  • Appropriate axial immersion
Industry Sectors
Authors
Author Affiliations
  • 1.¬†Department of Applied Mechanics, Budapest University of Technology and Economics, Budapest, H-1111, Hungary
  • 2.¬†Ideko-Ik4 Technological Centre, Elgoibar, Basque Country, Spain
Last modified on Tuesday, 20 September 2016 11:49
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