Long-term performance of stone-cutting tools

Rosa, Luı́s Guerra; Fernandes, Jorge Cruz; Anjinho, Carlos A.; Coelho, A.; Amaral, P.M.

doi:10.1016/j.ijrmhm.2014.05.021

Cited by 17 publications

(13 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the resultant forces were higher in Next 300 segments (where a lower concentration of active diamonds was observed compared to the Cobalite HDR segments), it can be concluded that a higher concentration of active diamonds generates lower force during the cutting process. Previous studies conducted with different tools and different stone materials [17,18] have shown that the electric energy consumption varies linearly with the resultant force F r . In the present study, lower average force F r in the Cobalite HDR segments was accompanied by a slightly lower value of Z (see Table 7).…”

Section: Discussionmentioning

confidence: 99%

“…The first version of this equipment was commissioned in 1997, but since then new versions have been constructed. Detailed description of the IST-Lisbon Classification Equipment can be found in other publications [16][17][18] and the measurements made with it allow the determination of the following parameters: the parameter Z representing the electric energy consumption per unit mass of removed stone; the parameter φ, which represents the mass loss of the tool per unit mass of removed stone; the force F v , defined as the mean value of vertical load measurements monitored (and data stored) during the grinding operation; the force F h , defined as the mean value of horizontal load measurements monitored (and data stored) during the grinding operation.…”

Section: Test Proceduresmentioning

confidence: 99%

“…publications [16][17][18] and the measurements made with it allow the determination of the following parameters: the parameter Z representing the electric energy consumption per unit mass of removed stone; the parameter φ, which represents the mass loss of the tool per unit mass of removed stone; the force , defined as the mean value of vertical load measurements monitored (and data stored) during the grinding operation; the force , defined as the mean value of horizontal load measurements monitored (and data stored) during the grinding operation. Using the abovementioned parameters it is then possible to obtain two other quantities: i) the stone "relative abrasiveness" towards the used tool, expressed by the parameter A so that:…”

Section: Test Proceduresmentioning

confidence: 99%

“…and ii) the resultant force , generated by the contact between the tool and the granite, which is given by: To allow the comparison of results obtained from several tools, the worktable velocity and the rotational speed of the tool, as well as the water flow, were kept constant during the tests (see Table 4). The tests were conducted with the discs rotating in downcut conditions [18] towards the tile of the granite. Each grinding slot or groove took 18 s to be made.…”

Section: Test Proceduresmentioning

confidence: 99%

See 3 more Smart Citations

Mechanical Properties of Some Metallic Powder Alloys and Their Contribution to the Performance of Diamond Tools Used for Cutting Granite

Rosa

Anjinho

Amaral

et al. 2019

Metals

Self Cite

View full text Add to dashboard Cite

This work examined some pre-alloyed cobalt-, iron-, and copper-based powder binder systems—such as those launched commercially under the brand names of Cobalite and Next—in terms of their as-sintered physical-mechanical properties, namely, apparent density, Young´s modulus, yield strength, rupture strength, rupture strain, toughness modulus, and Vickers hardness. These types of sintered products are traditionally used in the fabrication of diamond impregnated tools for cutting granite stones. The following powder binder systems were evaluated: Cobalite HDR pre-alloyed powder, Next 300 pre-alloyed powder, and four other mixtures of these with Cu and Fe powders: Cobalite HDR + 20 wt% Cu; Cobalite HDR + 20 wt% Fe; Next 300 + 20 wt% Cu; Next 300 + 20 wt% Fe. The evaluation methodology aimed to establish criteria for developing new diamond tools and, therefore, it included the measurement of several technological parameters directly related to the cutting performance of the tools (e.g., energy consumption measurements made exclusively in the tool drive motor, forces generated in the tool, tool consumption per unit weight of stone removed by the cutting). The results show the adequacy of the methodology for the optimisation of diamond retention capacity of these types of metal matrices and for improving the working performance of the diamond tools.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Test Proceduresmentioning

confidence: 99%

Section: Test Proceduresmentioning

confidence: 99%

Section: Test Proceduresmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical Properties of Some Metallic Powder Alloys and Their Contribution to the Performance of Diamond Tools Used for Cutting Granite

Rosa

Anjinho

Amaral

et al. 2019

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…In [13], the authors study the problem of the durability and durability of stone-cutting tools. Chipping or dust formation is not considered.…”

Section: Analysis Of the Literature Data And Formulation Of The Problemmentioning

confidence: 99%

Investigation of the Formation Process of Hazardous and Harmful Production Factors When Cutting a Stone for Construction Works

Bezpalova

Лебедев

2017

EUREKA: Physics and Engineering

View full text Add to dashboard Cite

Stone cutting for construction work is carried out by disk diamond wheels the rotation speed of which, and, consequently, the cutting speed is 35-50 m/s. In view of the high intensity of the cutting process and intensive microchip formation, the process of stone cutting is accompanied by considerable dust formation, which can be both harmful and dangerous in the work. The greatest danger is represented by dust particles, which dimensions are 5 μm or less. These particles have the greatest pathogenic effect on the respiratory system of the human body. In addition, the settling time of these particles is measured in hours. Thus, even after the termination of work, the risk of dust exposure to the human body remains. Insignificant time of inhalation of these particles can lead a person to disability and death. Insurance payments in case of disability and compensation in case of death of an employee for these reasons all over the world amount to multibillion sums, which, even for this reason, makes the issue of combating this phenomenon very urgent. In this paper, the process of generation of hazardous and harmful production factors arising as a result of dust formation during the stone cutting, the regularity of dust distribution by fractions, quantitative indicators of the process for improving equipment, as well as individual and collective means of personnel protection are determined. The shape and dimensions of the cutting grains of the cutting discs are studied in the paper, depending on the grain material and the grain size of the cutting disc. Thecurvature radii of the cutting grains depend on the grain material and the grain size of the cutting disc. The actual number of grains participating in cutting and, consequently, in dust formation is shown. The dimensions of the dust particles depend on the graininess of the cutting discs and the processing regimes. Using the law of normal particle size distribution, the percentage of dust particles is determined depending on processing conditions. The rate of particle settling depends on their size and mass. The formation of a dust-air mixture and its probable concentration and chemical composition of dust depend on the chemical composition of the cutting materials. Regularities are obtained, which can give an opportunity to improve the individual and collective protection of workers from this harmful production factor.

show abstract

Investigation and Application of Fe–Co−Cu Based Diamond Cutting Tools with Different Bronze Content Used in Marble Production

Bulut

Tazegul

Baydoğan

et al. 2017

Advanced Structured Materials

View full text Add to dashboard Cite

Long-term performance of stone-cutting tools

Cited by 17 publications

References 14 publications

Mechanical Properties of Some Metallic Powder Alloys and Their Contribution to the Performance of Diamond Tools Used for Cutting Granite

Mechanical Properties of Some Metallic Powder Alloys and Their Contribution to the Performance of Diamond Tools Used for Cutting Granite

Investigation of the Formation Process of Hazardous and Harmful Production Factors When Cutting a Stone for Construction Works

Investigation and Application of Fe–Co−Cu Based Diamond Cutting Tools with Different Bronze Content Used in Marble Production

Contact Info

Product

Resources

About