Research on force and temperature characteristics of novel point grinding wheels

• Published in: Journal of mechanical science and technology 2018, 32(8), , pp.3817-3834
• Main Authors: Yin, G. Q., Gong, Y. D., Li, Y. W., Cheng, J.
• Format: Article
• Language: English
• Subjects: Compressive properties; Control; Dynamical Systems; Engineering; Finite element method; Grinding wheels; Heat; Heat generation; Industrial and Production Engineering; Mechanical Engineering; Plastic deformation; Residual stress; Service life; Simulation; Surface roughness; Tensile stress; Vibration; Workpieces; 기계공학
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-018-0734-3

We propose a novel point grinding wheel (NPGW) with coarse grinding zone angle θ . According to earlier studies, this type of grinding wheel has high grinding efficiency, long service life, and generates very little surface roughness. The contact zone between the grinding wheel and workpiece is modified by the addition of the NPGW with the coarse grinding zone angle θ and the inclined angle α of point grinding process, and as a result, grinding force and grinding zone temperature are also altered. The grinding force theoretical model of NPGW was established and the grinding zone temperature was simulated by the finite element method, based on the theory of grinding heat generation and distribution and triangular heat source distribution model. At the same time, seven pieces of NPGW with different angles θ used for grinding experiments were fabricated. The theoretical model of grinding force and the simulation of grinding temperature coincided with experimental results. Therefore, the grinding force theoretical model and the grinding temperature simulation provide an auxiliary and predictive method for the actual process. Moreover, the influence of parameters on grinding force and grinding zone temperature can be obtained, and the results indicate that the NPGW and point grinding process can reduce grinding force and grinding zone temperature. Finally, plastic deformation is attributed to the production of compressive stress and grinding heat is attributed to the production of tensile stress. Therefore, the residual stress is influenced by the grinding force and the grinding temperature coupled. The residual stress of workpiece surface and subsurface was studied. In conclusion, the NPGW and point grinding process can reduce residual stress of workpiece surface and subsurface, in the case of tensile and compressive stress.