# Lund University Publications

## LUND UNIVERSITY LIBRARIES

### Analytical Calculation of the True Equivalent Chip Thickness for Cutting Tools and its Influence on the Calculated Tool Life

and Schultheiss, Fredrik LU (2012) In Advanced Materials Research 576. p.80-86
Abstract
A majority of the established systems for determination 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 and are... (More)
A majority of the established systems for determination 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 and are up to 40 % 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)
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Metal cutting, Equivalent chip thickness, round inserts
in
volume
576
pages
80 - 86
publisher
Trans Tech Publications Ltd
external identifiers
• scopus:84869478031
ISSN
1022-6680
DOI
10.4028/www.scientific.net/AMR.576.80
language
English
LU publication?
yes
id
dedd8db4-f27d-4cdf-8a9a-684f6490e617 (old id 3053773)
2012-09-19 09:06:09
date last changed
2018-01-07 04:45:09
```@article{dedd8db4-f27d-4cdf-8a9a-684f6490e617,
abstract     = {A majority of the established systems for determination 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 and are up to 40 % 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 Schultheiss, Fredrik},
issn         = {1022-6680},
keyword      = {Metal cutting,Equivalent chip thickness,round inserts},
language     = {eng},
pages        = {80--86},
publisher    = {Trans Tech Publications Ltd},