Experimental investigation of material removal mechanism in single grit grinding

Öpöz, Tahsin Tecelli; Chen, Xun

doi:10.1016/j.ijmachtools.2012.07.010

Cited by 126 publications

(42 citation statements)

References 19 publications

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“…Besides, Fig. 20 also indicates that large depth of cut and workpiece feed rate usually result in increasing pileup ratio and this is consistent with the findings given in [35]. Therefore, the DEM GW has the ability in simulating realistic grinding process.…”

Section: Performance In Grinding Processsupporting

confidence: 83%

Modeling and simulation of grinding wheel by discrete element method and experimental validation

Zhu

et al. 2015

Int J Adv Manuf Technol

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A simulated grinding wheel (GW), a numerical representative that describes the geometric and physical properties of realistic GWs, is the prerequisite and foundation of grinding research. However, most proposed numerical GWs treated realistic GWs as continuums without internal structure (e.g., binder and pores) and analyzed realistic GWs' behaviors based on continuum-based material theories. To fill this gap, this study attempts to introduce a discontinuum-based method, discrete element method (DEM), into GW modeling and simulation. DEM GW simulation begins with two grindingcustomized modifications to classic DEM theory. Then, with the aid of experimental measurement and statistical analysis, a DEM GW is modeled. Experimental validations are conducted thereafter. Results show acceptable agreements between DEM and realistic GWs in terms of topography, microscopic structure, fracture behavior in compressive test, and performance in grinding process. The proposed DEM GW's ability in describing a discontinuous structure of realistic GWs covers the shortage of existing numerical GWs and might have other promising applications (e.g., GW formula optimization in production, GW preparation technology and parameter optimization, and GW wear and life prediction).Keywords Discrete element method . Grinding wheel . Modeling and simulationAbbreviation Scalar (in alphabetical order) a bHalf the length of octahedron minor axis (see Fig. 8a) a tHalf the length of spheriod minor axis (see Fig. 8aHalf the length of octahedron major axis (see Fig. 8a) b tHalf the length of spheriod major axis (see Fig. 8a)

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Section: Performance In Grinding Processsupporting

confidence: 83%

Modeling and simulation of grinding wheel by discrete element method and experimental validation

Zhu

et al. 2015

Int J Adv Manuf Technol

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“…This phenomenon is also known as a self-sharpening during the grinding process 29 . Because it is impossible to measure the grit profile after each consecutive scratching pass under current test setup, the profile of the scratched grooves on the workpiece can be reasonably considered as the out-most profile of the grit, albeit errors may exist due to elastic deformation, which is insignificant 30,31 . As seen in Figure 5, scratched grooves also included some tiny scratches (spikes) inside the main scratches.…”

Section: Scratch Profile Measurementmentioning

confidence: 99%

“…The grit fracture wear is considered as the main responsible mechanism that changed the single edge scratches into multiple edge scratches. cutting edges act as a single cutting edge creates a single scratch with adjacent multiple grooves 7 .…”

Section: Scratch Profile Measurementmentioning

confidence: 99%

“…Albeit, there are a substantial amount of tests performed by using a shaped abrasive grit or shaped cutting tool (known geometry) such as a diamond indenter or stylus 6,12,13 , spherical tool 14 , or negative rake cutter 15 to reduce shape factor influence during material removal, some experimental works also exist with the actual abrasive grits 5,7,8,10,16 . Shaped tools are good for experiments because they make easy comparisons with computational models 14,[17][18][19][20][21][22] .…”

Section: Introductionmentioning

confidence: 99%

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Experimental study on single grit grinding of Inconel 718

Öpöz

Chen

2014

Proceedings of the Institution of Mechanical Engineers, Part B:

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This paper presents an important investigation of material removal mechanism in grinding utilizing single grit scratch tests. The investigation helps people to understand the abrasive cutting behaviour when the abrasive cutting edge shape alters during single grit grinding. The results provide fundamental knowledge of the grinding material removal process which helps to improve grinding performance and quality. CBN grits of 40/50 mesh size were used to perform scratch tests on the alloy Inconel 718. The concepts of material pile up ratio and material removal strength were introduced to measure the material removal efficiency during grinding. It is found that pile up ratio decreases and material removal strength increases when the depth of cut increases, albeit the material removal mechanism is highly dependent on the abrasive grit cutting edge shape. The material removal mechanism along the scratch length shows different behaviours at the entrance and exit sides of the scratching passes. When a grit was moving along its scratch path, it pushed material forward resulting in high material accumulation at the exit side of the scratches. Consequently, cutting is more prominent at the entrance side of the scratch, whereas ploughing or pile-up is extremely high at the exit side of the scratches. The research finding provides crucial information for grinding process optimization.

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“…A comprehensive understanding of the single grain interaction enables to synthesise the removal mechanism of grinding tool down-scaled to the contribution of each single grain. Öpöz and Chen [19] recently investigated the removal mechanism and scratch topography using CBN grit.…”

Section: Introductionmentioning

confidence: 99%

Influence of the clearance angle on the cutting efficiency of blunt, octahedral-shaped diamonds in an active filler alloy

Transchel

Heini

Stirnimann

et al. 2013

International Journal of Machine Tools and Manufacture

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Experimental investigation of material removal mechanism in single grit grinding

Cited by 126 publications

References 19 publications

Modeling and simulation of grinding wheel by discrete element method and experimental validation

Modeling and simulation of grinding wheel by discrete element method and experimental validation

Experimental study on single grit grinding of Inconel 718

Influence of the clearance angle on the cutting efficiency of blunt, octahedral-shaped diamonds in an active filler alloy

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