The Prediction Model of Cutting Forces Based on Johnson-Cook’s Flow Stress Model |
| Journal |
Key Engineering Materials (Volumes 392 - 394) |
| Volume |
Manufacturing Automation Technology |
| Edited by |
Guanglin Wang, Huifeng Wang and Jun Liu |
| Pages |
1-6 |
| DOI |
10.4028/www.scientific.net/KEM.392-394.1 |
| Online since |
October, 2008 |
| Authors |
Hai Tao Liu,
Ya Zhou Sun,
Ze Sheng Lu,
Li Li Han
|
| Keywords |
Cutting Force, Johnson-Cook Stress Model, Orthogonal Cutting, Predicting Model |
| Abstract |
Thin-walled parts with complex configurations are extensively used in aerospace and
precise instrument industry. However, because of low stiffness, cutting forces, clamping forces and
residual stresses in cutting have been the main factors influenced on machining accuracy of
thin-walled parts. Furthermore, biggish deviation exists between practical finished surface and
theoretical value as a result of machining deformation caused by cutting force namely “cutter
relieving” phenomenon; besides, direct relation exists between determination of clamping force and
generation of machining residual stress and cutting force, so it is necessary to build up accurate
cutting force prediction model to improve the machining accuracy of thin-walled parts. Therefore,
cutting force prediction model based on Johnson-Cook’s flow stress model and Oxley’s shear angle
model has been developed, which takes the property of high strain, high strain ratio in area of cut and
high cutting temperature into account fully and determines shear angle more accurately on the basis of
force balance principle; with different cutting and tool geometric parameters existing, perform
simulation and experiment studies on cutting force prediction model, verify the validity of prediction
model and obtain the response rules resulted from cutting force prediction model acting on cutting
and tool geometric parameters. |
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