Recent Developments in Chip Control Research and Applications

Jawahir, I.S.; Luttervelt, C.A. van

doi:10.1016/s0007-8506(07)62531-1

Cited by 282 publications

(107 citation statements)

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“…The tendency of the PCBN cutting tool to increase the residual stresses was also reported by Marques et al (2006). When comparing with the coated cemented carbide cutting tools, the higher negative effective tool rake angle of the PCBN chamfered tools, combined with its lower thermal conductivity (44 W/mK for the PCBN and 100 W/mK for the coated cemented carbide) (Jawahir and Van Luttervelt, 1993), will conduct more thermal energy to the workpiece (Outeiro et al, 2006). As a consequence, higher tensile residual stresses are generated when machining with PCBN tools when compared with coated cemented carbide tools.…”

Section: Genetic Algorithmsupporting

confidence: 56%

Surface integrity predictions and optimisation of machining conditions in the turning of AISI H13 tool steel

Outeiro¹

2014

IJMMM

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To cite this version:José Outeiro. Surface integrity predictions and optimisation of machining conditions in the turning of AISI H13 tool steel. International Journal of Machining and Machinability of Materials, Inderscience, 2014, 15 (1/2), pp.122-134. Science Arts & Métiers (SAM)is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Abstract: Surface integrity (SI) plays a very important role in functional performance. It is dependent on a large number of machining parameters. The major concern of industry is to know which combination of machining parameters provides the best SI of machined components. Traditionally, surface roughness is considered to be the principal parameter to assess the SI of a machined part. However, residual stresses also become an important parameter because they control the lifetime of components (moulds, dies, etc.) and their abilities to withstand severe thermal and mechanical cyclic loadings (fatigue) during service. Therefore, significant improvements in the quality of the mould/die can be achieved with the control of residual stresses and surface roughness, both induced by machining. This paper examines both residual stresses and surface roughness induced by the dry turning of AISI H13 tool steel with different hardnesses. SI parameters were evaluated experimentally with respect to tool geometry, cutting speed, feed and depth of cut. A modelling and optimisation procedure based on artificial neural network (ANN), response surface methodology (RSM) and genetic algorithm (GA) approaches was developed and applied to identify the optimum combination of cutting parameters, leading to the best SI for machined components.Keywords: surface integrity; residual stresses; surface roughness; modelling; optimisation.Reference to this paper should be made as follows: Outeiro, J.C. (2014 His main research interest is the optimisation of machining operations with special emphasis on the quality of the machined components. His work is published in several peer-reviewed scientific journals and conference proceedings on machining related research topics.This paper is a revised and expanded version of a paper entitled 'Optimization of machining parameters for improved surface integrity of AISI H13 tool steel' presented at 7th

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Section: Genetic Algorithmsupporting

confidence: 56%

Surface integrity predictions and optimisation of machining conditions in the turning of AISI H13 tool steel

Outeiro¹

2014

IJMMM

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“…It has been reported by one major automobile manufacturer that fully one-third of the cycle time in its engine plants is spent in carrying out drilling processes. 105 High throughput drilling requires a high-speed spindle machine, a sophisticated tool holder, and a specialized drill. Currently, it is quite common to have a machine with a spindle speed of 10,000-20,000rpm.…”

Section: Drilling Processmentioning

confidence: 99%

“…On the other hand, drill geometry, drill material, and the requirements of the tool holder remain as challenges to be met utilizing the advanced machines to the maximum of their capability. 105 ' 106 '…”

Section: Drilling Processmentioning

confidence: 99%

Machinability aspects of heat-treated Al-(6-11)%Si cast alloys :

Zedan¹

2010

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“…De acordo com Jawahir e van Luttervelt [2], até a década de 1940 pouca importância foi dada à retirada do cavaco e os maiores esforços eram dedicados ao desgaste da ferramenta e às forças de corte. Na década de 50 os primeiros estudos relacionados ao fluxo do cavaco e ao uso de dispositivos para quebra do mesmo ganharam força.…”

Section: Introductionunclassified

Desenvolvimento de um quebra-cavacos para a operação de roscamento do aço ABNT 4133 modificado

et al. 2015

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RESUMOO setor de óleo e gás vem ampliando seu mercado nos últimos anos devido a uma demanda cada vez maior por recursos de energia. Descobertas na região do pré-sal estão exigindo a prospecção de poços de maior profundidade usando tubos com maior resistência a pressões elevadas e para atuarem em ambientes corrosivos. Todo esse cenário faz com que novos aços e novas roscas sejam desenvolvidos, aumentando a geração de cavacos e a complexidade de sua quebra, além de trazer problemas de manutenção das roscadeiras e de segurança para os operadores de máquinas ferramentas. Apesar de todo esse período de desenvolvimento no segmento de tubos petrolíferos, pouco se estudou sobre quebra-cavacos mecânicos específicos para esse setor. Com isso, acaba-se utilizando quebra-cavacos de catálogo que não foram projetados especificamente para a aplicação citada, que e consequentemente, promovem a formação de cavacos em forma de fita emaranhada. Este trabalho foi focado no desenvolvimento de quatro quebra-cavacos, baseando-se na região de desgaste da superfície de saída da ferramenta de roscamento e, consequentemente, alterando a distância do quebracavacos da aresta de corte. Os quatro quebra-cavacos desenvolvidos e um modelo já existente no mercado foram testados. Durante os testes os parâmetros de corte (velocidade de corte, profundidade de usinagem e sobremetal de torneamento) variaram com intuito de se analisar seu impacto na eficiência da quebra dos cavacos e qualidade da peça. Os resultados mostraram que os quebra-cavacos mais próximos da aresta de corte foram os mais eficientes na quebra dos cavacos, os valores de sobremetal não influenciaram a quebra e a profundidade de usinagem foi a variável que mais afetou a qualidade da rosca. Finalmente, não foi possível encontrar nenhuma variação no consumo de potência do motor do eixo principal comparando o quebra-cavacos desenvolvido com o quebra-cavacos original. Com isso, foi possível produzir cavacos curtos, melhorar a segurança da operação de roscamento e a manutenção das máquinas.Palavras-chave: Quebra-cavacos, roscamento, petrolífero. ABSTRACTThe oil and gas market has increased during the last years due to a higher demand for energy resources. Presalt areas require deeper wells, pipes more resistant to internal and external pressures, high temperatures and also to corrosive environment. This scenario requested the development of new steel grades and new designs for threaded connections, thus increasing chips formation and the difficulty to break them. It brought issues for conveyors maintenance and safety risks for machine operators. Despite this period of intensive development in the oil and gas market, only a few studies for chip breakers specifically designed for this application have been conducted. In general, pipe manufacturers buy chip breakers from off-the-shelf, i. e. chip breakers that were not designed for this segment, thus not providing optimum results. This work is concerned with the development of a chip breaker, based on the rake face wear of the threading too...

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Recent Developments in Chip Control Research and Applications

Cited by 282 publications

References 0 publications

Surface integrity predictions and optimisation of machining conditions in the turning of AISI H13 tool steel

Surface integrity predictions and optimisation of machining conditions in the turning of AISI H13 tool steel

Machinability aspects of heat-treated Al-(6-11)%Si cast alloys :

Desenvolvimento de um quebra-cavacos para a operação de roscamento do aço ABNT 4133 modificado

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