Manufacturing and sustainability of bonding systems for grinding tools

Linke, Barbara

doi:10.1007/s11740-016-0668-5

Cited by 14 publications

(8 citation statements)

References 20 publications

(42 reference statements)

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“…Resin-bonded grinding wheels were compounded via hot pressing with the resin-abrasivereinforcement mixture filled in a mold. The mold was patterned with the negative of the desired grinding wheel shape and size [11]. This operation occurred under compression at predetermined temperature and pressure of 300 o C and 40 MPa respectively.…”

Section: Methodsmentioning

confidence: 99%

Thermal Behaviour of Oyster Shell as an Abrasive for Industrial Grinding Wheel

Pauline,

Kamsiyochukwu,

Ifeanyi

2024

IJLEMR

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Demand for products with excellent dimensional accuracy, structural stability and surface integrity makes hard and brittle abrasives for grinding wheels to be highly sought for which becomes more attractive when recovered from wastes for cost reduction and environmental sustainability. It is challenging to control generated heat during grinding operations, hence, thermo physical stability of grinding wheels made from Oyster shell abrasives(OSA)is hereby studied. Aimed at producing wheels with potentials to compete favorably with those made from mineral abrasives associated with high cost of production, health and environmentally threatening liabilities. Samples were made from a ternary mixture of ground Oyster shell as abrasive, Bakelite powder as Binder and two plies of Glass fiber as reinforcement through hot pressing. Formulation with 60% OSA offered 79 Shore D hardness and wear rate of 0.0002g/min which were superior to a commercial product. Microscopic evaluations revealed an even distribution of pores and the OSA grains in the Bakelite matrix with DSC results demonstrating a thermal conductivity of 0.1232W/m/K. TGA results showed a two-step thermal degradation. First was loss of moisture at 1.432mg by weight at 211.85 o C with second step being thermal decomposition of 6.352mg showing a thermal stability of 53.16% at 418.70 o C.

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Section: Methodsmentioning

confidence: 99%

Thermal Behaviour of Oyster Shell as an Abrasive for Industrial Grinding Wheel

Pauline,

Kamsiyochukwu,

Ifeanyi

2024

IJLEMR

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“…Once it is technical-scientific knowledge that the impurities in this kind of oxides are responsible for affecting the properties of such oxides, the addition of components intentionally inserted can modify the properties and cause effects that shall be points for investigation [2]. It is worth highlighting that the presence of Cr 2 O 3 and TiO 2 , for example, increases toughness, while the presence of Na 2 O is disadvantageous since it results in the formation of β-11Al 2 O 3 .Na 2 O compound responsible for reducing the hardness of the white fused alumina [6]. As in the conventional sintering process, the addition of niobium in the calcined aluminum oxide reduces the alumina sintering temperature due to the activation of the presence of the liquid phase [7], and densification happens as the temperature and the concentration of niobium increase.…”

Section: Introductionmentioning

confidence: 99%

Influence of the addition of niobium oxide on the properties of fused aluminum oxide used in abrasive tools

Passos

Morelli

2022

Cerâmica

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Fused alumina is a material used in the manufacturing of abrasive tools, due to its high fusion point, great hardness, and mechanical toughness. In this context, this study addressed the influence of niobium addition on the properties of fused alumina for abrasive applications. A comparison was also made between this oxide and the brown fused alumina and the white fused alumina traditionally applied in this market, using different characterization techniques, such as particle size characterization, scanning electron microscopy, real and bulk density, chemical analysis, fracture resistance, and abrasiveness indexes. Among the main findings of this study, it was possible to observe that the addition of niobium to fused alumina significantly increased the fracture resistance and abrasiveness indexes compared to the brown and white fused alumina.

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“…Resin bonded abrasive tools are generally manufactured in thermal-pressing molds. Most of the manufacturing process needs high pressure and high temperatures (of about 200 °C) for a long time [2]. The required pro le of the grinding wheels can be achieved by providing appropriate molds.…”

Section: Introductionmentioning

confidence: 99%

Digital light processing based additive manufacturing of resin bonded SiC grinding wheels and their grinding performance

Khosravi

Azarhoushang

et al. 2021

Preprint

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In this study, an additive manufacturing process based on digital light processing was employed for quick, flexible, and economical fabrication of resin-bonded SiC grinding tools. The grinding wheel has been fabricated using laboratory manufacturing processes that utilize ultraviolet-curable resins and conventional abrasives. Also, desirable geometries and features like integrated coolant holes, which are difficult or even almost impossible to manufacture by conventional processes, are easily achievable. Grinding experiments were carried out by different process parameters, and with two different grinding wheels, i.e. with and without cooling channels with different concentrations (25 wt.% and 50 wt.% grains) to evaluate the grinding efficiency of the produced tools. Grinding forces, tool wear, tool loading, and ground surface quality were measured and analyzed. The wear rates of the grinding wheels with cooling channels were generally less than those without cooling channels, particularly in the deep grinding processes with large contact areas. Grinding tests on a hardened steel have shown that the integration of cooling lubricant channels almost prevents the wheel loading. In addition, by increasing the cutting speed (from 15 to 30 m/s) and decreasing the feed rate (from 10 to 2 m/min) the grinding wheel wear was significantly reduced. Furthermore, surface grinding of aluminum resulted in surface roughness values (Ra) in the range of 1 µm to 2.5 µm, while a Ra of about 0.2 µm was achieved by grinding hardened steel (100Cr6) with the same grinding conditions. Using the higher SiC-grain concentration (50 wt.%), it was determined that the surface roughness was 50% finer. Additionally the tool wear was significantly reduced (up to 30 times depending on the process parameters). The wear characteristics of the grinding wheel was analyzed through a novel image processing system. Significant correlations were found between wear flat of grains and the increase in grinding forces due to the tool wear.

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Manufacturing and sustainability of bonding systems for grinding tools

Cited by 14 publications

References 20 publications

Thermal Behaviour of Oyster Shell as an Abrasive for Industrial Grinding Wheel

Thermal Behaviour of Oyster Shell as an Abrasive for Industrial Grinding Wheel

Influence of the addition of niobium oxide on the properties of fused aluminum oxide used in abrasive tools

Digital light processing based additive manufacturing of resin bonded SiC grinding wheels and their grinding performance

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