Research on Microscopic Grain-Workpiece Interaction in Grinding through Micro-Cutting Simulation, Part 2: Factorial Study

Lü, Yan; Li, Xue Kun; Jin, Feng; Zhou, Zhan; Rong, Yi

doi:10.4028/www.scientific.net/amr.76-78.15

Cited by 12 publications

(7 citation statements)

References 10 publications

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“…where α n is the abrasive grain rank angle; φ n is the shear angle according to [39,40]; λ is the aspect ratio of the shear zone, ranging from 6 to 12 [41]; a e is the thickness of the shear zone, equivalent to half of the maximum undeformed chip thickness a gmax ; C is a constant related to the abrasive rank angle; N d is the active abrasive grain number; and d s is the wheel diameter.…”

Section: Discussionmentioning

confidence: 99%

Creep feed grinding induced gradient microstructures in the superficial layer of turbine blade root of single crystal nickel-based superalloy

Miao

Ding

et al. 2021

Int. J. Extrem. Manuf.

111

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The service performance of the turbine blade root of an aero-engine depends on the microstructures in its superficial layer. This work investigated the surface deformation structures of turbine blade root of single crystal nickel-based superalloy produced under different creep feed grinding conditions. Gradient microstructures in the superficial layer were clarified and composed of a severely deformed layer (DFL) with nano-sized grains (48–67 nm) at the topmost surface, a DFL with submicron-sized grains (66–158 nm) and micron-sized laminated structures at the subsurface, and a dislocation accumulated layer extending to the bulk material. The formation of such gradient microstructures was found to be related to the graded variations in the plastic strain and strain rate induced in the creep feed grinding process, which were as high as 6.67 and 8.17 × 107 s−1, respectively. In the current study, the evolution of surface gradient microstructures was essentially a transition process from a coarse single crystal to nano-sized grains and, simultaneously, from one orientation of a single crystal to random orientations of polycrystals, during which the dislocation slips dominated the creep feed grinding induced microstructure deformation of single crystal nickel-based superalloy.

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Section: Discussionmentioning

confidence: 99%

Creep feed grinding induced gradient microstructures in the superficial layer of turbine blade root of single crystal nickel-based superalloy

Miao

Ding

et al. 2021

Int. J. Extrem. Manuf.

111

View full text Add to dashboard Cite

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“…Su [9] et al have established abrasive models of polyhedral and rectangular pyramid using method of random surface cutting cube according to SEM images of CBN abrasive, and simulated four pyramid CBN abrasive cutting process using SPH method. In simulation of single abrasive grinding process, finite element method (FEM), molecular dynamics (MD) and geometry kinematics have been used [10][11][12][13] . Based on these studies, different abrasive particles with a variety of shapes have many similarities in simulation as shown in Fig2.…”

Section: Single Abrasive Particle Geometrymentioning

confidence: 99%

Study on Honing Mechanism of Gear Surface Using an Internal Honing Wheel Based on Single-Particle Abrasive

Zhang

Han

2018

KEM

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Based on geometry model of single abrasive particle, comparing abrasive geometries of different materials displayed in SEM images, it is proposed that abrasive geometry is similar to inverted cone with vertex radius in sphere. Based on abrasives with inverted cone geometry, through introducing sliding ratio, mathematical models of cutting force and specific grinding energy of single abrasive have been established to study about cutting force in meshing line of single abrasive; in accordance with specific grinding energy of single abrasive, combined with internal meshing principle, the relationship among specific grinding energy, engagement, and meshing line length l have been studied. Through simulation analysis, it is shown that the unit normal force of single abrasive in whole meshing line gradually increases from tooth top to pitch line and tooth root; the greater the value of l from pitch line to tooth top, the more the specific grinding energy accordingly; however the greater the value of l from pitch line to tooth root, the smaller the specific grinding energy therewith; the greater the engagement, the smaller the specific grinding energy which tends to stable with changing of l.

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“…The profile of groove generated from single grit cutting was compared with the 3D simulation results to validate the feasibility of FEM [2]. The simulation of single grit cutting was performed to research the microscopic grit-workpiece interaction of grinding process [3]. The precision of FEM simulation depends on the material model [4], friction model [5], and heat transfer model [6] and so on.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Single Grit Cutting

Lü

Jin

et al. 2013

KEM

Self Cite

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Grinding process can be considered as micro-cutting processes with a lot of irregular abrasive grits on the surface of grinding wheel. The study of the grit-workpiece interaction through single grit cutting is an important contribution to describe the material removal processes in the grinding process. In this study, single grit cutting processes with different process parameters (depth of cut, cutting speed) were modeled by FEM software AdvantEdge. The critical depth of cut from plowing t cutting was investigated. The simulated tangential and radial cutting forces increase sharply due to the pile-up of workpiece material in the front of single grit when the depth of cut reached to some value. And the increase extent of cutting forces at low cutting speed is larger than that at high cutting speed due to the thermal softening of workpiece material. The simulated highest cutting temperature increase first, and then decrease, finally increase again with the increase of depth of cut. And the peak value of simulated highest cutting temperature occurs near the critical depth of cut. The simulated material removal rate increases with the increase of cutting speed and depth of cut.

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Research on Microscopic Grain-Workpiece Interaction in Grinding through Micro-Cutting Simulation, Part 2: Factorial Study

Cited by 12 publications

References 10 publications

Creep feed grinding induced gradient microstructures in the superficial layer of turbine blade root of single crystal nickel-based superalloy

Creep feed grinding induced gradient microstructures in the superficial layer of turbine blade root of single crystal nickel-based superalloy

Study on Honing Mechanism of Gear Surface Using an Internal Honing Wheel Based on Single-Particle Abrasive

Numerical Simulation of Single Grit Cutting

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