TEMPERATURE AND HEAT FLOW WHEN TAPPING OF THE HARDENED STEEL USING DIFFERENT COOLING SYSTEMS

Machining hardened steels has always been a great challenge in metal cutting, particularly for tapping operations. In the present paper, temperature was assessed when tapping hardened AISI H13. Dry machining and two cooling/lubrication systems were used: flooded and minimum quantity of fluid (MQF) w...

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Autores principales:	Cardoso Brandão,Lincoln, Teixeira Coelho,Reginaldo
Lenguaje:	English
Publicado:	Universidad de Tarapacá. 2009
Materias:	Tapping heat flow minimum quantity of fluid (MQF) steel AISI H13 temperature
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052009000200015
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spelling	oai:scielo:S0718-330520090002000152009-09-10TEMPERATURE AND HEAT FLOW WHEN TAPPING OF THE HARDENED STEEL USING DIFFERENT COOLING SYSTEMSCardoso Brandão,LincolnTeixeira Coelho,Reginaldo Tapping heat flow minimum quantity of fluid (MQF) steel AISI H13 temperature Machining hardened steels has always been a great challenge in metal cutting, particularly for tapping operations. In the present paper, temperature was assessed when tapping hardened AISI H13. Dry machining and two cooling/lubrication systems were used: flooded and minimum quantity of fluid (MQF) with 20ml/h, both using mineral oil. The tapping operation was performed on 100 x 40 mm, 14 mm thick workpieces with 55 HRc. An implanted thermocouple technique was used for temperature measurement at distances very close to the highest thread diameter (at 0.1, 2.5 and 5.0 mm). Three thermocouples were used for each distance along the workpiece diameter at 3.0, 7.0 and 11.0 mm from the tap entrance. Measurements were replicated twice for each condition tested. An analytical theoretical heat conduction model was used to evaluate the temperature at the tool-workpiece interface and determine the heat flow and convection coefficient. The smallest temperature increase and heat flow were observed when using the flooded system, followed by the MQF, compared to the dry condition. The effect was directly proportional to the amount of lubricant applied, as well as with the MQF system, when compared to dry cutting.info:eu-repo/semantics/openAccessUniversidad de Tarapacá.Ingeniare. Revista chilena de ingeniería v.17 n.2 20092009-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052009000200015en10.4067/S0718-33052009000200015
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Tapping heat flow minimum quantity of fluid (MQF) steel AISI H13 temperature
spellingShingle	Tapping heat flow minimum quantity of fluid (MQF) steel AISI H13 temperature Cardoso Brandão,Lincoln Teixeira Coelho,Reginaldo TEMPERATURE AND HEAT FLOW WHEN TAPPING OF THE HARDENED STEEL USING DIFFERENT COOLING SYSTEMS
description	Machining hardened steels has always been a great challenge in metal cutting, particularly for tapping operations. In the present paper, temperature was assessed when tapping hardened AISI H13. Dry machining and two cooling/lubrication systems were used: flooded and minimum quantity of fluid (MQF) with 20ml/h, both using mineral oil. The tapping operation was performed on 100 x 40 mm, 14 mm thick workpieces with 55 HRc. An implanted thermocouple technique was used for temperature measurement at distances very close to the highest thread diameter (at 0.1, 2.5 and 5.0 mm). Three thermocouples were used for each distance along the workpiece diameter at 3.0, 7.0 and 11.0 mm from the tap entrance. Measurements were replicated twice for each condition tested. An analytical theoretical heat conduction model was used to evaluate the temperature at the tool-workpiece interface and determine the heat flow and convection coefficient. The smallest temperature increase and heat flow were observed when using the flooded system, followed by the MQF, compared to the dry condition. The effect was directly proportional to the amount of lubricant applied, as well as with the MQF system, when compared to dry cutting.
author	Cardoso Brandão,Lincoln Teixeira Coelho,Reginaldo
author_facet	Cardoso Brandão,Lincoln Teixeira Coelho,Reginaldo
author_sort	Cardoso Brandão,Lincoln
title	TEMPERATURE AND HEAT FLOW WHEN TAPPING OF THE HARDENED STEEL USING DIFFERENT COOLING SYSTEMS
title_short	TEMPERATURE AND HEAT FLOW WHEN TAPPING OF THE HARDENED STEEL USING DIFFERENT COOLING SYSTEMS
title_full	TEMPERATURE AND HEAT FLOW WHEN TAPPING OF THE HARDENED STEEL USING DIFFERENT COOLING SYSTEMS
title_fullStr	TEMPERATURE AND HEAT FLOW WHEN TAPPING OF THE HARDENED STEEL USING DIFFERENT COOLING SYSTEMS
title_full_unstemmed	TEMPERATURE AND HEAT FLOW WHEN TAPPING OF THE HARDENED STEEL USING DIFFERENT COOLING SYSTEMS
title_sort	temperature and heat flow when tapping of the hardened steel using different cooling systems
publisher	Universidad de Tarapacá.
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052009000200015
work_keys_str_mv	AT cardosobrandaolincoln temperatureandheatflowwhentappingofthehardenedsteelusingdifferentcoolingsystems AT teixeiracoelhoreginaldo temperatureandheatflowwhentappingofthehardenedsteelusingdifferentcoolingsystems
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TEMPERATURE AND HEAT FLOW WHEN TAPPING OF THE HARDENED STEEL USING DIFFERENT COOLING SYSTEMS

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