Evaluation of Workpiece Surface Integrity Following Point Grinding of Advanced Titanium and Nickel Based Alloys

Curtis, David; Soo, Sein Leung; Aspinwall, D.K.; Mantle, Andrew L.

doi:10.1016/j.procir.2016.02.343

Cited by 22 publications

(11 citation statements)

References 9 publications

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“…In addition, the use of point grinding tools can also help improve the overall flexibility of the grinding operation when utilized together with highspeed tool-changeable attachment spindles, such as the one applied in this investigation. This allows point grinding to be integrated with other machining processes, removing the need for large grinding machines and potentially displacing less flexible operations [4,5]. However, alongside the advantages, the small diameter of the tools also brings about several challenges.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Electroplated Cubic Boron Nitride Tool Surface Texture Parameters During Point Grinding

Pietrow

Curtis

Novovic

et al. 2022

Journal of Manufacturing Science and Engineering

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Point grinding is an abrasive machining process the utilises small diameter superabrasive single-layer grinding tools for accurate machining of complex 3D geometries. Due to the small nature of these tools, high wear rates and uneven wear around the tool circumference present a challenge for their successful application for finish machining of metallic components. It is, therefore, essential to monitor the surface condition of the point grinding tools, to ensure their reliable operation. In this investigation, the 3D topography evolution of single-layer B126 cBN point grinding tools was characterised using focus-variation imaging. Given the wealth of information obtained using this method, a decision-matrix methodology was used to identify the most important parameters for monitoring the wear condition of the point grinding tools. Grinding trials were also performed with fixed cutting parameters and varied cutting durations up to 520mm3 of material removed to assess the evolution of the point grinding tool surfaces over time as a result of wear during grinding of hardened D2 tool steel. The best criteria for the characterisation of the surface texture of electroplated cBN point grinding tool surfaces were identified to be the average surface height (Sa), skewness (Ssk), root mean square gradient (Sdq), reduced peak height (Spk), peak material volume (Vmp) and developed interfacial area ratio (Sdr). These parameters performed best for direct measurement of point grinding tool surfaces, paving the way for the application of the imaging technique under manufacturing conditions as an on-machine monitoring method for performance assessment.

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Section: Introductionmentioning

confidence: 99%

Evolution of Electroplated Cubic Boron Nitride Tool Surface Texture Parameters During Point Grinding

Pietrow

Curtis

Novovic

et al. 2022

Journal of Manufacturing Science and Engineering

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“…Results showed that increasing cutting speed led to reduced tool wear rates while cubic boron nitride (CBN) grits produced lower absolute wear levels compared to diamond, albeit at the expense of higher workpiece surface roughness. More recently, work carried out by Curtis et al [4] similarly assessed the performance of electroplated CBN and diamond grinding points when machining Udimet 720 in terms of G-ratio and the subsequent influence on workpiece surface roughness/integrity. Research on point grinding of titanium alloys have included the use of electroplated [4] or vitrified bonded [5,6] superabrasives (CBN and diamond); and vitrified corundum Al2O3 points [7].…”

Section: Introductionmentioning

confidence: 99%

“…More recently, work carried out by Curtis et al [4] similarly assessed the performance of electroplated CBN and diamond grinding points when machining Udimet 720 in terms of G-ratio and the subsequent influence on workpiece surface roughness/integrity. Research on point grinding of titanium alloys have included the use of electroplated [4] or vitrified bonded [5,6] superabrasives (CBN and diamond); and vitrified corundum Al2O3 points [7]. Depending on the wheel characteristics and process parameters employed, ground workpiece surface roughness values varied between Ra 0.25 to 2.8 µm.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of superabrasive grinding points for the machining of hardened steel

et al. 2019

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Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

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“…The surface roughness generated during grinding depends on the number of process parameters which may interact in their influence on surface roughness during the grinding process. They include the material of the workpiece [11], type of abrasives [12], cutting fluids, cooling methods [13,14], cutting oil viscosity [15], design of a coolant nozzle [16] and cutting parameters such as grinding speed, grinding depth, feed rate [17][18][19]. These factors can influence surface roughness individually or collectively.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Surface Roughness of Ti-6Al-4V for Surface Grinding under Different Cooling Methods Using Conventional and Vegetable Oil-based Cutting Fluids

Ronoh¹,

Karuri²,

Mwema³

et al. 2019

Tribol. Ind.

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In this research study, the surface roughness of medical grade Ti-6Al-4V alloy was evaluated to understand the effects of cutting fluids, cooling methods, and grinding depths after surface grinding with alumina wheel. Three cutting fluid types namely sunflower oil, sunflower oil-based cutting fluid, and conventional cutting oil were applied to the grinding zone using two cooling methods: minimum quantity lubrication and wet cooling methods. The grinding was undertaken at grinding depths of 0.005, 0.010, and 0.015 mm. The surface roughness of the ground surfaces was determined using a surface profiler. An analysis of variance demonstrated that the individual contributions of cutting fluid types, cooling methods and grinding depths to surface roughness were 42.7 %, 8.46 % and 40.61 % respectively. The design of the experiment was done using Taguchi L9 orthogonal array to determine the collective contributions of the grinding parameters. The analysis of the signal-to-noise ratio shows that the optimal surface roughness of Ti-6Al-4V was obtained with sunflower oil-based cutting fluid, a minimum quantity lubrication of 0.67L/h and a grinding depth of 0.005 mm. This study provides novel evidence of how grinding parameters can be used collectively to optimize Ti-6Al-4V machining.

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Evaluation of Workpiece Surface Integrity Following Point Grinding of Advanced Titanium and Nickel Based Alloys

Cited by 22 publications

References 9 publications

Evolution of Electroplated Cubic Boron Nitride Tool Surface Texture Parameters During Point Grinding

Evolution of Electroplated Cubic Boron Nitride Tool Surface Texture Parameters During Point Grinding

Evaluation of superabrasive grinding points for the machining of hardened steel

Evaluation of the Surface Roughness of Ti-6Al-4V for Surface Grinding under Different Cooling Methods Using Conventional and Vegetable Oil-based Cutting Fluids

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