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True equivalent chip thickness for tools with a nose radius

Ståhl, Jan-Eric LU ; Andersson, Mats LU and Andersson, Carin LU (2007) Swedish Production Symposium 2007
Abstract
A majority of the established systems for choice and optimization of cutting data are based on Woxén’s equivalent chip thickness, heW. In metal cutting theory and models, the equivalent chip thickness is of vital importance when the depth-of-cut ap is in the same order or smaller than the nose radius r. Woxén made considerable simplifications in his chip area model, that form the basis for calculations of the equivalent chip thickness. Basic mathematical solutions, e.g. describing the chip area on circular inserts, are lacking. This article describes the geometrical implications when machining with round inserts. The error in Woxén’s equivalent chip thickness is largest when the depth-of-cut is ... (More)
A majority of the established systems for choice and optimization of cutting data are based on Woxén’s equivalent chip thickness, heW. In metal cutting theory and models, the equivalent chip thickness is of vital importance when the depth-of-cut ap is in the same order or smaller than the nose radius r. Woxén made considerable simplifications in his chip area model, that form the basis for calculations of the equivalent chip thickness. Basic mathematical solutions, e.g. describing the chip area on circular inserts, are lacking. This article describes the geometrical implications when machining with round inserts. The error in Woxén’s equivalent chip thickness is largest when the depth-of-cut is less than ¼ of the nose radius. The calculations of the equivalent chip thickness based on the Woxén model are up to 50 % wrong, for some combinations of cutting data in the finishing range. The presented results explain the difficulties in getting a good validity in the models used to calculate tool life in finishing machining. The error leads to an underrating of the tool load in many machining situations. (Less)
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organization
publishing date
type
Contribution to conference
publication status
unpublished
subject
keywords
round inserts., metal cutting, Woxén, equivalent chip thickness
pages
7 pages
conference name
Swedish Production Symposium 2007
conference location
Göteborg, Sweden
conference dates
2007-08-28 - 2007-08-30
language
English
LU publication?
yes
id
ec06ef9b-fcc4-43cc-b3a8-5fa9f6b037a8 (old id 1513378)
date added to LUP
2016-04-04 14:33:45
date last changed
2019-04-01 16:54:25
@misc{ec06ef9b-fcc4-43cc-b3a8-5fa9f6b037a8,
  abstract     = {A  majority  of  the  established  systems  for  choice  and  optimization  of  cutting  data  are  based  on  Woxén’s equivalent chip thickness, heW. In metal cutting theory and models, the equivalent chip thickness is of vital  importance  when  the  depth-of-cut  ap is in the same order or smaller than the nose radius r. Woxén  made considerable  simplifications  in  his  chip  area  model,  that  form  the  basis  for  calculations  of  the  equivalent  chip  thickness. Basic mathematical solutions, e.g. describing the chip area on circular inserts, are lacking. This article describes the geometrical implications when machining with round inserts. The error in Woxén’s equivalent chip thickness  is  largest  when  the  depth-of-cut  is  less  than  ¼  of  the  nose  radius.  The  calculations  of  the  equivalent  chip thickness based on the Woxén model are up to 50 %  wrong,  for  some  combinations  of  cutting  data  in  the  finishing  range.    The  presented  results  explain  the  difficulties  in  getting  a  good  validity  in  the  models  used  to  calculate tool life in finishing machining.  The error leads to an underrating of the tool load in many machining situations.},
  author       = {Ståhl, Jan-Eric and Andersson, Mats and Andersson, Carin},
  language     = {eng},
  title        = {True equivalent chip thickness for tools with a nose radius},
  url          = {https://lup.lub.lu.se/search/ws/files/61814706/True_equivalent_chip_thickness.pdf},
  year         = {2007},
}