Researches on Effect of Impact Micro-Damages in Contact Layer on Machinability in Quick-Point Grinding |
| Journal |
Key Engineering Materials (Volumes 389 - 390) |
| Volume |
Advances in Abrasive Technology XI |
| Edited by |
Tsunemoto Kuriyagawa, Libo Zhou, Jiwang Yan and Nobuhito Yoshihara |
| Pages |
229-234 |
| DOI |
10.4028/www.scientific.net/KEM.389-390.229 |
| Online since |
September, 2008 |
| Authors |
Shi Chao Xiu, Suo Xian Yuan, Guang Qi Cai |
| Keywords |
Impact Micro-Damages, Quick-Point Grinding, Removal Ratio, Strain Rate, Surface Roughness |
| Abstract |
Due to the high grinding speed and the less contact length, there is the super high material
strain rate in the contact layer during quick-point grinding process. Based on the principle of
micro-damages mechanics, it is the impact process between the workpiece and the grits on the wheel
in the process. The weakening effects of the super high strain rate caused by the mechanical impact
micro-damages and the adiabatic shearing damage can lower the dynamic strength of the material in
contact layer and the micro-plastic pile-up deformation on the ground surface in the process.
Therefore, it is possible to improve the surface integrity of the workpiece since the materials removal
mechanism is changed in quick-point grinding process. In this paper, the impact performances and the
model of quick point grinding process were studied. Based on the above, the model of the ground
surface roughness related to the plastic pile-up deformation was established. The effects of the strain
rate on the ground surface roughness and the materials removal ratio were analyzed. In addition, the
grinding experiment was performed to testify such investigations. It is indicated that quick-point
grinding is an impact process assuredly during the removing material process. |
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