Dry grinding process with workpiece precooling

Oliveira, João Fernando Gomes de; Silva, Eraldo Jannone da; Coelho, Reginaldo Teixeira; Brozek, Lukas; Bottene, Alex Camilli; Marcos, Gustavo Pollettini

doi:10.1016/j.cirp.2015.04.098

Cited by 10 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Regarding the consumption of cutting fluid, ways of reducing its mist and dirty cutting fluid (DCF) emissions should be pursued to decrease its environmental impacts. In this sense, techniques such as minimal quantity lubrication (MQL) and dry machining could represent great improvement opportunities (Aurich et al, 2013;Hadad, 2015;Oliveira et al, 2015). Additionally, the use of vegetable-based cutting fluid would also contribute to decrease cutting fluid environmental impacts, as they are produced from renewable sources, possess high biodegradability and are less toxic (Kuram et al, 2013;Lawal et al, 2014;Somashekaraiah et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Productive and environmental performance indicators analysis by a combined LCA hybrid model and real-time manufacturing process monitoring: A grinding unit process application

Filleti

Silva

et al. 2017

Journal of Cleaner Production

View full text Add to dashboard Cite

Among machining processes, grinding has been used to achieve high dimensional tolerances and surface quality on workpieces. Yet, high levels of energy expenditure per volume of removed material and the need for cutting fluids make grinding one of the most environmentally impactful machining processes. Furthermore, changes in parameters such as grain and bond specifications of the grinding wheel, cutting speed, and specific material removal rate can lead to different productive and environmental results. Thus, the analysis of grinding processes should not be aggregated and leveraged into a single and broad output parameter. Instead, comprehensive study should be performed, in which the most relevant process parameters, inputs and outputs are considered. This paper presents a detailed study of grinding process, including the characterization of machine subunits and production modes, along with the use of a combined life cycle assessment hybrid model and real-time monitoring system to evaluate the consumption of energy, tooling, cutting fluid and compressed air. A detailed cradle-to-gate life cycle assessment study using eleven different impact categories and a productive performance assessment were performed to evaluate the effects on varying specific material removal rate and wheel type. For equal values of specific material removal rate, the change from a conventional wheel to a cubic boron nitride represented a power requirement increase of 19–24%. Cubic boron nitride wheel achieved remarkably better results on the wheel wear and part roughness indicators for all tested conditions. The environmental performance assessment showed a strict relation between the process environmental impacts and the consumption of electric energy and cutting fluid. To conclude, despite the higher power requirements, the combination of cubic boron nitride wheel with high values of specific material removal rate optimizes both the productive and the environmental results

show abstract

Section: Discussionmentioning

confidence: 99%

Productive and environmental performance indicators analysis by a combined LCA hybrid model and real-time manufacturing process monitoring: A grinding unit process application

Filleti

Silva

et al. 2017

Journal of Cleaner Production

View full text Add to dashboard Cite

show abstract

“…To address the issue of high heat production during the grinding process, researchers have developed various methods aimed at reducing heat generation. These methods include ultrasonic vibration-assisted grinding [37][38][39][40][41][42], minimum quantity lubrication (MQL) [13,43,44], nanoparticle jet minimum quantity lubrication (NJMQL) cooling grinding [1,45], cryogenic cooling grinding [46][47][48][49], grinding wheels with lipophilic or hydrophobic surfaces [50,51], and workpiece pretreatment [52]. However, regardless of the specific method employed, it is crucial to thoroughly understand the fundamental scientific problem of grinding heat [53][54][55][56][57].…”

Section: Introductionmentioning

confidence: 99%

Temperature field model in surface grinding: a comparative assessment

Yang,

Kong,

et al. 2023

Int. J. Extrem. Manuf.

View full text Add to dashboard Cite

Grinding is a crucial process in machining workpieces because it plays a vital role in achieving the desired precision and surface quality. However, a significant technical challenge in grinding is the potential increase in temperature due to high specific energy, which can lead to surface thermal damage. Therefore, ensuring control over the surface integrity of workpieces during grinding becomes a critical concern. This necessitates the development of temperature field models that consider various parameters, such as workpiece materials, grinding wheels, grinding parameters, cooling methods, and media, to guide industrial production. This study thoroughly analyzes and summarizes grinding temperature field models. First, the theory of the grinding temperature field is investigated, classifying it into traditional models based on a continuous belt heat source and those based on a discrete heat source, depending on whether the heat source is uniform and continuous. Through this examination, a more accurate grinding temperature model that closely aligns with practical grinding conditions is derived. Subsequently, various grinding thermal models are summarized, including models for the heat source distribution, energy distribution proportional coefficient, and convective heat transfer coefficient. Through comprehensive research, the most widely recognized, utilized, and accurate model for each category is identified. The application of these grinding thermal models is reviewed, shedding light on the governing laws that dictate the influence of the heat source distribution, heat distribution, and convective heat transfer in the grinding arc zone on the grinding temperature field. Finally, considering the current issues in the field of grinding temperature, potential future research directions are proposed. The aim of this study is to provide theoretical guidance and technical support for predicting workpiece temperature and improving surface integrity.

show abstract

“…Esta combinação pode ocasionar problemas de pele, respiratórios e digestivos. Somado a isso tem-se atualmente leis ambientais mais rígidas, tanto para a proteção ambiental como para a proteção aos operadores [4]. Todos estes fatores contribuem com pesquisas voltadas para a redução ou completa eliminação do uso de fluidos na indústria de fabricação do futuro sem que haja perdas em qualidade ou produtividade.…”

Section: Introductionunclassified

Aplicação da técnica de CAMQL na retificação cilíndrica externa do aço AISI 4340 utilizando rebolo de CBN

et al. 2019

View full text Add to dashboard Cite

RESUMO O processo de retificação possui como características o bom acabamento superficial e alta precisão dimensional e geométrica. Assim, peças usinadas por este processo possuem um alto valor agregado por se tratar de um processo de acabamento que é comumente realizado nas últimas etapas da fabricação. Um fator limitador do processo de retificação é a quantidade de calor gerada, a qual é minimizada pela aplicação de fluidos de corte. Os fluidos utilizados, na maior parte dos casos são poluentes e contém substâncias que são nocivas à saúde e ao meio ambiente, além do mesmo possuir um alto custo de compra, manutenção e descarte. Visando reduzir a quantidade de fluido utilizada durante o processo de retificação, o presente trabalho foi desenvolvido. O seu principal objetivo é melhorar a técnica da mínima quantidade de lubrificação através da aplicação combinada com ar comprimido a baixa temperatura. Esta aplicação visa aumentar o efeito de refrigeração e assim minimizar a geração de calor na região de corte. Para avaliar a eficácia da técnica foram analisados os parâmetros de rugosidade, circularidade, desgaste do rebolo e potência consumida durante a usinagem. Estes valores foram medidos para três métodos distintos de aplicação de fluidos de corte durante o processo de retificação, a fim de compará-los. A técnica de lubri-refrigeração convencional obteve melhores resultados para os parâmetros analisados, ficando a técnica de CAMQL (mínima quantidade de fluido combinado com a aplicação de ar comprimido resfriado) com resultados intermediários e a técnica de MQL (mínima quantidade de lubrificação) com os piores resultados obtidos em todos os parâmetros. A técnica proposta de redução de quantidade de fluido utilizada atingiu, em geral, resultados positivos, provando a viabilidade da mesma para a retificação do aço AISI 4340 utilizando rebolo de CBN, o Nitreto Cúbico de Boro, um superabrasivo com capacidade de corte inferior apenas ao diamante.

show abstract

Dry grinding process with workpiece precooling

Cited by 10 publications

References 12 publications

Productive and environmental performance indicators analysis by a combined LCA hybrid model and real-time manufacturing process monitoring: A grinding unit process application

Productive and environmental performance indicators analysis by a combined LCA hybrid model and real-time manufacturing process monitoring: A grinding unit process application

Temperature field model in surface grinding: a comparative assessment

Aplicação da técnica de CAMQL na retificação cilíndrica externa do aço AISI 4340 utilizando rebolo de CBN

Contact Info

Product

Resources

About