Prediction about ground hardening layers distribution on grinding chatter by contact stiffness

The grinding hardening is an integrated manufacturing technology which combines the surface hardening theory and the grinding technology. However, the grinding chatter accompanies with the whole grinding hardening process. It is the existence of the grinding chatter that makes the transformation uns...

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Bibliographic Details
Published in:Archives of Civil and Mechanical Engineering 2018-09, Vol.18 (4), p.1626-1642
Main Authors: Sun, Cong, Duan, Jinchao, Lan, Dongxue, Liu, Zhenxin, Xiu, Shichao
Format: Article
Language:English
Subjects:
Cellular automata
Chatter
Civil Engineering
Engineering
Experiments
Finite difference method
Grinding
Grinding chatter
Grinding hardening
Manufacturing
Martensite
Martensite content
Mechanical Engineering
Mechanical properties
Numerical methods
Original Research Article
Structural Materials
Surface hardening
Temperature distribution
Transformed microstructure
Workpieces
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Summary:The grinding hardening is an integrated manufacturing technology which combines the surface hardening theory and the grinding technology. However, the grinding chatter accompanies with the whole grinding hardening process. It is the existence of the grinding chatter that makes the transformation unsteady. To this end, the paper presents a three-hybrid model to investigate the relationship between the grinding chatter and the grinding hardening layers distribution. The dynamic grinding force with the analytic and numerical method is calculated firstly. Then the finite difference method (FDM) is used to obtain the dynamic temperature distribution accordingly. Thirdly, the cellular automata (CA) method is applied to calculate the transformed microstructure distribution under different chatter strengths. The study shows that the thickness of the grinding hardening layers goes up with the increase of the grinding chatter. However, the quality of the grinding hardening layers reduces with the increase of the chatter strength. In addition, the martensite content varies with different hardening layers since each layer has its own unique temperature distribution. Moreover, metallurgical experiments are conducted to validate the proposed model. The model is anticipated to be meaningful for the improvements of workpiece's mechanical properties by controlling the chatter strength in the industry manufacturing.
ISSN:1644-9665
2083-3318
DOI:10.1016/j.acme.2018.06.010