Investigation of the grinding temperature and subsurface quality of a novel point grinding wheel

In this paper, a novel point grinding wheel (NPGW) with coarse grinding area angle θ is proposed. According to earlier studies, this type of grinding wheel has the advantages of high grinding efficiency, a long service life, and very little surface roughness generated. The contact zone between the g...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2018-07, Vol.97 (1-4), p.1565-1581
Main Authors: Yin, Guoqiang, Gong, Yadong, Li, Youwei, Wang, Fei
Format: Article
Language:English
Subjects:
CAE) and Design
Compressive properties
Computer simulation
Computer-Aided Engineering (CAD
Engineering
Finite element method
Grinding wheels
Heat
Heat generation
Industrial and Production Engineering
Mechanical Engineering
Media Management
Microstructure
Original Article
Parameters
Residual stress
Service life
Simulation
Surface roughness
Temperature distribution
Thermocouples
Work hardening
Workpieces
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Summary:In this paper, a novel point grinding wheel (NPGW) with coarse grinding area angle θ is proposed. According to earlier studies, this type of grinding wheel has the advantages of high grinding efficiency, a long service life, and very little surface roughness generated. The contact zone between the grinding wheel and workpiece is modified by the addition of the NPGW with the coarse grinding area angle θ and the inclining angle α of the point grinding process, and as a result, the grinding zone temperature is also altered. Using the finite element method, the grinding zone temperature can be simulated based on the theory of grinding heat generation and distribution, and the triangular heat source distribution model. From this, the distribution of the point grinding temperature field and influence of different grinding parameters on the grinding zone temperature were obtained. To verify the simulation, thermocouple measurements for different NPGWs were taken during the grinding experiments. The simulation provides an auxiliary and predictive method for the actual process. Moreover, an L 16 (4 5 ) orthogonal experiment was designed. Analyzing this range, primary and secondary factors affecting grinding zone temperature, and the optimum combination of parameters for reducing the grinding zone temperature, are determined. Finally, the grinding heat can affect the quality of the workpiece subsurface; therefore, the influence of the various parameters on subsurface quality, including metallographic structure, work hardening, and residual stress, was studied. In conclusion, the NPGW and point grinding process can reduce the degree of work hardening and residual stress of the subsurface of the workpiece, and it was demonstrated that the residual stress changes from compressive to tensile with increasing depth.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-018-2055-1