Experimental Evaluation of Super High-Speed Grinding of Advanced Ceramics

“…However, it still shows great difficulty to machine them because of their great hardness and brittleness. Grinding with diamond wheels [5,6] has become the main processing method that can be expected to achieve the desired dimensional tolerance and surface integrity. Moreover, the machine tools being used to machine brittle materials are characterized by closed loop structure, high accuracy, and excellent rigidity [7,8].…”

Section: Introductionmentioning

confidence: 99%

Prediction of grinding force for brittle materials considering co-existing of ductility and brittleness

Yang

et al. 2016

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Grinding of brittle materials is characterized by a complex removal mechanism of both ductile and brittle removal. Therefore, the traditional force models, which are mainly targeted to metallic materials, cannot be fully applied to the force prediction of brittle materials. This paper will propose a new grinding force model for brittle materials considering co-existing of ductile removal force and brittle removal force. The ductile removal force is mainly composed of rubbing force, ploughing force, and chipping force. However, the brittle removal force is more related to rubbing force and fracture chipping force. The proportional coefficient of ductile removal and crack size will be modeled through a series of experiments under different wheel speed and undeformed chip thickness. The working status for a single grit was separated based on the Hertz Theory and chip thickness modeling of Rayleigh probability density function. Grinding experiments have been undertaken by using a high speed diamond grinder on Silicon Carbide, and the results was compared to the force model predictions for validation. The predictive force model shows a reasonable agreement quantitatively with the experimental force data.

show abstract

“…However, www.intechopen.com it is noteworthy that the relative importance of each function also depends on the material being machined, the type of tool employed, the machining conditions, the surface finish and the dimensional quality and shape required (Tawakoli & Azarhoushang, 2008). Ramesh et al (2001) mention that, during the process of sintering of ceramics, there is a shrinking of material, which cannot be completely avoided. Therefore it is needed to machine the material properly, in order to achieve the shape and geometrical tolerances required for the component.…”

Section: Introductionmentioning

confidence: 99%