An analysis of strain in chip breaking using slip-line field theory with adhesion friction at chip/tool interface

Das, N.S.; Chawla, B.S.; Biswas, Chandan Kumar

doi:10.1016/j.jmatprotec.2005.05.032

Cited by 14 publications

(10 citation statements)

References 16 publications

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“…Isso pode ser atribuído à distância da aresta de corte, uma vez que esses dois quebra-cavacos são os de maior distância. Esse resultado comprova a teoria apresentada por CHAWLA [6] e DAS et al [14] de que a distância do quebra-cavacos à aresta de corte é a variável mais influente na quebra do cavaco. Segundo NAKAYAMA [15], a fratura do cavaco ocorre quando a deformação que este está sofrendo é maior que o limite de ruptura.…”

Section: Discussionunclassified

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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Section: Discussionunclassified

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

et al. 2015

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“…The drilling tests were performed by using a Z5050 drilling machine (Anhui Chizhou Household Machine Tool Co., Ltd., Anhui, China), equipped with a maximum spindle speed of 3000 rpm and a 1.5 kW drive motor. They were performed at three different cutting speeds (13,21, and 34 m/min) and feed rates (0.12, 0.2, and 0.32 mm/rev) whilst hole depth was kept constant at 7 mm. All drilling experiments were conducted under dry cutting conditions.…”

Section: Drilling Experiments and Cutting Toolsmentioning

confidence: 99%

“…The purpose of the confirmation test is to validate the conclusions drawn during the analysis phase [13]. Once the optimal level of the process parameters is selected, the final step is to predict and verify the improvement of the performance characteristics using the optimal level of the process parameters.…”

Section: Confirmation Testsmentioning

confidence: 99%

“…The tool life and cutting forces are important quality indicators in machining processes and the various properties of machined parts, such as friction and heat transmission are also influenced by these indicators [13]. Most of the process parameters, such as tool material, cutting speed, and feed rate, affect the tool life and machine energy consumption, and therefore, it is very difficult to develop a proper analytical model of the tool life, cutting force, and power consumption [14].…”

Section: Introductionmentioning

confidence: 99%

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Prediction and Optimization of Drilling Parameters in Drilling of AISI 304 and AISI 2205 Steels with PVD Monolayer and Multilayer Coated Drills

Youssef

El-Hofy

Ahmed

2018

JMMP

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Due to their high ductility, high durability, and excellent corrosion resistance, stainless steels are attractive materials for a variety of applications. However, high work hardening, low thermal conductivity, and high built-up edge (BUE) formation make these materials difficult to machine. Rapid tool wear and high cutting forces are the common problems encountered while machining these materials. In the present work, the application of Taguchi optimization methodology has been used to optimize the cutting parameters of the drilling process for machining two stainless steels: austenitic AISI 304 and duplex AISI 2205 under dry conditions. The machining parameters which were chosen to be evaluated in this study are the tool material, cutting speed, and feed rate, while, the response factors to be measured are the tool life (T), cutting force (F c ), and specific cutting energy (k s ). Additionally, empirical models were created for predicting the T, F c and k s using linear regression analysis. The results of this study show that AISI 2205 stainless steel has a shorter tool life, a higher cutting force, and a higher specific cutting energy than AISI 304 stainless steel. In addition, the Taguchi method determined that A 3 B 1 C 1 and A 3 B 3 C 1 (A 3 = TiN-coated twist drill, B 1 = 13 m/min, B 3 = 34 m/min, C 1 = 0.12 mm/rev) are the optimized combination of levels for the best tool life and the lowest cutting force, respectively. Meanwhile, the optimized combination of levels for all three control factors from the analysis, which provides the lowest specific cutting energy, was found to be A 3 B 1 C 3 (A 3 = TiN-coated twist drill, B 1 = 13 m/min, C 3 = 0.32 mm/rev) for both stainless steels.

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“…In order to investigate the relationship, many scientists have suggested diverse theories and experienced approaches for the past 100 years. In particular, the basic mechanisms for chip flow, chip curl, and chip breaking have been researched widely through experiments and analysis (Das et al, 2005;Kharkevich and Venuvinod, 2002;Lee et al, 2006). Based on these results, several methods have been suggested recently for effective chip control which breaks chips into a predetermined size.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of chip breaker utilizing neural network

Kim

Sim

Kweon

2009

Journal of Materials Processing Technology

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An analysis of strain in chip breaking using slip-line field theory with adhesion friction at chip/tool interface

Cited by 14 publications

References 16 publications

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

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

Prediction and Optimization of Drilling Parameters in Drilling of AISI 304 and AISI 2205 Steels with PVD Monolayer and Multilayer Coated Drills

Performance evaluation of chip breaker utilizing neural network

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