Granite polishing: Effects of polishing parameters and tool paths on part quality and dust emission

Songmené, Victor; Miazza, A.; Hechmi, Mohamed Amine; Olufayo, Oluwole A.; Kouam, Jules

doi:10.1016/j.procir.2018.08.254

Cited by 4 publications

(9 citation statements)

References 5 publications

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“…Figure 26 and Figure 27 display the evolution of Ra values as a function of spindle speed and feed rate during grinding of black granite edges. A higher spindle speed leads to a better surface finish especially with roughing tools, but this does not apply to feed rate as demonstrated by Songmene et al [ 19 ]. In fact, these two parameters did not have a significant effect on the final roughness since at the end of the process and with finishing tools, the graphs of the three spindle speeds and feed rates will converge towards very small values of Ra.…”

Section: Resultsmentioning

confidence: 99%

CNC Edge Finishing of Granite: Effect of Machining Conditions on Part Quality, Cutting Forces, and Particle Emissions

et al. 2021

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Edge finishing is a shaping process that is extremely important in the granite and marble processing industries. It does not only shape the edge but also makes it shiny and durable. However, this process generates dust (fine and ultrafine particles) that can have a significant impact on air quality in the workshop and can put workers’ health at risk. While environmental requirements and occupational health and safety regulations are becoming increasingly stringent, at the same time, industries must continue to produce quality parts at competitive prices. The purpose of this study was to examine the surface quality, the cutting forces, and the emission of fine (FP) and ultrafine (UFP) particles during wet and dry edge finishing of granite edges as a function of the machining parameters and abrasive grit sizes. Three machining operations were investigated: roughing, semi-finishing, and finishing, using diamond abrasives (with grit sizes 45, 150, 300, 600, 1500, and 3000). The experiments were carried out on two granites, one being black and the other white. The tested spindle speeds ranged from 1500 rpm to 3500 rpm and the feed rates from 500–1500 mm/min. It was found that roughing operations produce more fine particles while finishing operations produce more ultrafine particles. These particle emissions, as well as the part quality and the cutting forces are strongly dependent on cutting speed and on the grit size of the abrasive used.

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Section: Resultsmentioning

confidence: 99%

CNC Edge Finishing of Granite: Effect of Machining Conditions on Part Quality, Cutting Forces, and Particle Emissions

et al. 2021

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“…Centering specifically on granite as the stone material, Songmene et al 2018 [ 11 ] summarized research studies dealing with the effects of polishing parameters and tool paths during rotational plane polishing on part quality and dust emission; the authors observed that heightened speeds, increased feed rates, and larger abrasive grit sizes collectively yielded superior surface finishes. Furthermore, their exploration into tool paths revealed that the spiral trajectory enhanced part surface finish, while the linear path resulted in surfaces with higher Ra values.…”

Section: Introductionmentioning

confidence: 99%

“…When micro-cutting granite, the initial ductile flow gradually transforms into brittle fracture once the critical cutting depth is reached. Songmene et al (2018) [11] observed that polishing conditions (feed rate, spindle speed) and tool path strategy can be used to reduce dust emission to some extent while maintaining the part quality and productivity at acceptable levels during granite polishing. The use of higher feed rates and higher polishing speeds led to better granite part surface finishes.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Effects of Tool Geometry and Cutting Conditions on Machining Behavior during Edge Finishing of Granite Using Concave and Chamfered Profiling Tools

Mateur,

Songmene,

Kouam

2024

Micromachines

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Granite edge finishing through grinding is a common process in the granite processing industry, crucial for achieving the final desired shape and edge quality of products. This study focuses on the granite industry, specifically delving into the significance of grinding and polishing for improving aesthetics and extending material longevity. The experimental design entails a comprehensive factorial experiment plan involving two workpiece materials (white and black granite samples) and two cutting tool edge shapes (chamfer and concave), each with two grit sizes: G150 and G600. The cutting conditions varied and consisted of variations in spindle speeds (1500, 2500, 3500 rpm), feed rates (500, 1000, 1500 mm/min), and lubrication modes (wet/dry). The results uncover intricate relationships among these parameters and part quality, underscoring the pivotal role of tool geometry in achieving superior surface finishes and in controlling the cutting forces. These findings contribute to a nuanced understanding of the dynamic interplay between tool characteristics, material properties, and machining conditions within the granite industry.

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“…For improving the occupational safety in granite transformation, different avenues are being explored, such as material substitution, process parameters and machining strategy modification [ 20 ], use of cutting fluids [ 21 ], dust caption [ 22 ] at the source for future use. Other researchers [ 23 , 24 , 25 ] have focused on using granite residues to incorporate them into materials such as concrete and mortar.…”

Section: Introductionmentioning

confidence: 99%

“…The results of their investigation showed that the type of granite, the machining parameters, and the method of machining have an impact on the particle emissions. Thereafter, rotational, dispersion, MQL (minimum quantity lubricant), and tool path polishing were investigated by these researchers (Saidi et al (2015) [ 27 ], Songmene et al (2018) [ 20 , 21 ] and Saidi et al (2018) [ 28 ]). Despite the health hazards associated with granite polishing, there appear to be only a few studies on silica dust characterization, those of Carrieri et al (2020) [ 29 ], Ramkissoon et al (2022) [ 30 ], and Hall et al (2022) [ 31 ], particularly in light of increasing cases of accelerated silicosis related to the use of engineered (artificial) stones in the construction industry.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Si and SiO2 in Dust Emitted during Granite Polishing as a Function of Cutting Conditions

et al. 2022

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Particles emitted during manufacturing processes such as polishing can represent a serious danger for the environment and for occupational safety. The formation mechanisms responsible for these dust emissions include chip formation, friction at the tool/workpiece and chip/tool interfaces, shearing and cutting. These mechanisms thus depend on workpiece and tool properties, as well as the polishing conditions. In the case of granite polishing, particle emissions during polishing can contain chemical compounds such as silica, which represent harmful health risks for the worker. It is therefore important to characterize the particles emitted and to search for possible interactions between the particles (size and composition) and the machining conditions in order to find ways of reducing emissions at the source. In this study, an investigation was undertaken to characterize the particles emitted during granite polishing as a function of polishing conditions, type of granite, and abrasive grit sizes used. Scanning electron microscopy (SEM) was employed for particle morphology characterization and particle grain size and chemical composition were evaluated using X-ray diffraction (XRD) and energy dispersive X-ray (EDX) techniques, respectively. Results show that the influence of polishing speed and feed rate on particle emission depends mainly on the granite type used, providing useful information for controlling the polishing procedure, and thereby dust emission.

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Granite polishing: Effects of polishing parameters and tool paths on part quality and dust emission

Cited by 4 publications

References 5 publications

CNC Edge Finishing of Granite: Effect of Machining Conditions on Part Quality, Cutting Forces, and Particle Emissions

CNC Edge Finishing of Granite: Effect of Machining Conditions on Part Quality, Cutting Forces, and Particle Emissions

Experimental Investigation on the Effects of Tool Geometry and Cutting Conditions on Machining Behavior during Edge Finishing of Granite Using Concave and Chamfered Profiling Tools

Characterization of Si and SiO2 in Dust Emitted during Granite Polishing as a Function of Cutting Conditions

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