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Jarl, Magnus
Publications (10 of 48) Show all publications
Larsson, J., Johansson-Cider, H. & Jarl, M. (2014). Temperatures in the wiredrawing process: Measurements and simulations. Wire Journal International, 47(2), 128-133
Open this publication in new window or tab >>Temperatures in the wiredrawing process: Measurements and simulations
2014 (English)In: Wire Journal International, ISSN 0277-4275, Vol. 47, no 2, p. 128-133Article in journal (Refereed) Published
Abstract [en]

The effect of high nib temperatures in the wiredrawing process was analyzed via thermocouples, with results comparded to FEM simulations.

Keywords
Wire drawing, temperature measurements, FEM, simulations
National Category
Mechanical Engineering
Research subject
Mechanical Engineering
Identifiers
urn:nbn:se:oru:diva-34906 (URN)2-s2.0-84897823657 (Scopus ID)
Projects
Teknik för högre draghastighet
Available from: 2014-04-29 Created: 2014-04-29 Last updated: 2018-06-05Bibliographically approved
Larsson, J., Johansson-Cider, H. & Jarl, M. (2013). Monitoring of the wiredrawing process. In: Wire Association International: Annual Convention. Paper presented at Wire Association International, 83rd Annual Convention, Atlanta, 22-25/4 2013.
Open this publication in new window or tab >>Monitoring of the wiredrawing process
2013 (English)In: Wire Association International: Annual Convention, 2013Conference paper, Published paper (Other academic)
Abstract [en]

Manual monitoring for flaws, which is dependent on operator experience, is normal praxis during wiredrawing. This paper investigates different methods to monitor the drawing process. Force measurement and an optical method have been tested in plant experiments. Monitoring of the drawing force gives some information, but is not reliable. Optical methods are expensive and sensitive for variation in the lubricant layer.

Series
Wire Association International Annual Convention ; 83
Keywords
Wire drawing, monitoring, steel
National Category
Mechanical Engineering
Research subject
Mechanical Engineering
Identifiers
urn:nbn:se:oru:diva-34909 (URN)
Conference
Wire Association International, 83rd Annual Convention, Atlanta, 22-25/4 2013
Projects
Automatisering vid tråddragning
Available from: 2014-04-29 Created: 2014-04-29 Last updated: 2018-05-22Bibliographically approved
Larsson, J., Johansson-Cider, H. & Jarl, M. (2013). Temperatures in the Wire Drawing Process: Measurements and Simulations. In: Wire Association International: Annual Convention. Paper presented at Wire Association International, 83rd Annual Convention, Atlanta, 22-25/4 2013.
Open this publication in new window or tab >>Temperatures in the Wire Drawing Process: Measurements and Simulations
2013 (English)In: Wire Association International: Annual Convention, 2013Conference paper, Published paper (Other academic)
Abstract [en]

The effect of high nib temperatures in the wiredrawing process was analyzed via thermocouples, with the results compared to FEM simulations.

Series
Wire Association International Annual Convention ; 83
Keywords
Wire drawing, Temperature measurements, FEM simulations
National Category
Mechanical Engineering
Research subject
Mechanical Engineering
Identifiers
urn:nbn:se:oru:diva-34910 (URN)
Conference
Wire Association International, 83rd Annual Convention, Atlanta, 22-25/4 2013
Projects
Högre draghastighet
Available from: 2014-04-29 Created: 2014-04-29 Last updated: 2018-05-22Bibliographically approved
Jarl, M. (2012). Automatisering, mätning och styrning av kvalitetspåverkande parametrar vid tråddragning. Stockholm: Jernkontoret
Open this publication in new window or tab >>Automatisering, mätning och styrning av kvalitetspåverkande parametrar vid tråddragning
2012 (Swedish)Report (Other academic)
Abstract [sv]

Ett antal metoder som eventuellt kan användas för övervakning av tråddragningsprocessen har inventerats och några har studerat. Möjligheten att övervaka av skivslitage med PLC har studerats. Optiska metoder och kraftsignaler för övervakning av rivning har studerats närmare.

 

Försök med övervakning av dragskiveslitage visade att PLC-systemet inte var tillräckligt noggrant sannolikt på grund av hastighetsmätningen. Optisk syning av tråden i linjen var svårt på grund av smörjmedelsrester på trådytan som inte gick att skilja från defekter. Dessutom var utrustning mycket dyr.

 

Ett antal industriförsök har genomförts med studier av kraftsignaler. Sambandet mellan kraftsignal och rivning är inte enkelt. Kraftiga rivningar kan detekteras med kraftmätning, men en enstaka repa på tråden är svår att detektera. Trådens blankhet kan registreras med pyrometer alternativt med digital- eller webkamera. Detta ger emellertid endast en indikering på hur smörjningen fungerar.

Abstract [en]

A number of methods, which possibly may be used for monitoring of the wire-drawing process, have been surveyed and some have been studied. The possibility to monitor wear of dies by calculations of the PLC-system has been studied. Optical methods and force signals for detection of flaws has been studied.

 

Trials to monitor the wear of drawing dies showed that the PLC-system was not accurate enough. The reason is most likely because of inaccurate wire speed measurement. Optical inspection of the wire in-line was complicated by lubricant flakes remaining on the wire surface and not possible to separate from defects. Additionally, the optical equipment was extremely expensive.

A number of industrial with studies of force signals has been done. The correlation between and scratches on the wire surface is not straight-forward. Sever scratching may be detected by force signals, but a single scratch is hard to find. The brightness of the wire may be monitored by a pyrometer or with a digital or web camera. This method gives only an indication of the condition of the lubrication.

Place, publisher, year, edition, pages
Stockholm: Jernkontoret, 2012. p. 41
Series
Jernkontorets forskning TO33 ; 16
Keywords
Wire drawing, steel, experiments, galling, scratching, force measurement, temperature measurement, signal processing
National Category
Mechanical Engineering
Research subject
Mechanical Engineering
Identifiers
urn:nbn:se:oru:diva-24296 (URN)
Projects
Jk 33015, Automatisering, mätning och styrning av kvalitetspåverkande parametrar vid tråddragning
Available from: 2012-08-07 Created: 2012-08-07 Last updated: 2017-10-17Bibliographically approved
Larsson, J. & Jarl, M. (2012). Högre draghastighet. In: Nordisk trådteknisk förening: Årsmötesbok. Paper presented at Nordisk trådteknisk förening, Årsmöteskonferns, Hagen, 18-19/9 2012 (pp. 63-70). Örebro: Nordisk trådteknisk förening (NTTF)
Open this publication in new window or tab >>Högre draghastighet
2012 (Swedish)In: Nordisk trådteknisk förening: Årsmötesbok, Örebro: Nordisk trådteknisk förening (NTTF) , 2012, p. 63-70Conference paper, Published paper (Other academic)
Abstract [sv]

Tråddragningsprocessen har studerats med försök och FEM-simuleringar. Försök har genomförts med ändringar i nibshållare. Försöken visar att draghastigheten kan ökas och skivslitaget minskas.

Place, publisher, year, edition, pages
Örebro: Nordisk trådteknisk förening (NTTF), 2012
Series
Årsmöteskonferens / Nordisk trådteknisk förening - NTTF, ISSN 1404-6237
Keywords
Wire drawing, steel
National Category
Mechanical Engineering
Research subject
Mechanical Engineering
Identifiers
urn:nbn:se:oru:diva-34904 (URN)
Conference
Nordisk trådteknisk förening, Årsmöteskonferns, Hagen, 18-19/9 2012
Projects
Teknik för högre draghastighet
Available from: 2014-04-29 Created: 2014-04-29 Last updated: 2017-10-17Bibliographically approved
Larsson, J. & Jarl, M. (2011). Teknik för högre draghastigheter: tempearturens inverkan. In: Nordisk trådteknisk förening: årsmötesbok. Paper presented at Nordisk trådteknisk förening, Årsmöteskonferns, Sundsvall, 15-16/9 2011 (pp. 53-60). Hallstahammar: Nordisk trådteknisk förening (NTTF)
Open this publication in new window or tab >>Teknik för högre draghastigheter: tempearturens inverkan
2011 (Swedish)In: Nordisk trådteknisk förening: årsmötesbok, Hallstahammar: Nordisk trådteknisk förening (NTTF) , 2011, p. 53-60Conference paper, Published paper (Other academic)
Abstract [sv]

Temperaturer i tråddragningsprocessen har studerats vid ett industriförsök i Hjulbro. Temperaturer har mätts på nibs, tråd på block och kylvatten. Simuleringar har utförts med finita element metoden, FEM. Programmet som simuleringarna utförs i är Marc Mentat 2010.

Place, publisher, year, edition, pages
Hallstahammar: Nordisk trådteknisk förening (NTTF), 2011
Series
Årsmöteskonferens / Nordisk trådteknisk förening - NTTF, ISSN 1404-6237
Keywords
Wire drawing, steel
National Category
Mechanical Engineering
Research subject
Mechanical Engineering
Identifiers
urn:nbn:se:oru:diva-24298 (URN)
Conference
Nordisk trådteknisk förening, Årsmöteskonferns, Sundsvall, 15-16/9 2011
Projects
Teknik för högre draghastighet
Available from: 2012-08-07 Created: 2012-08-07 Last updated: 2017-10-17Bibliographically approved
Överstam, H., Johansson, H. & Jarl, M. (2011). Temperatures at wire-drawing: simulations and verification efforts. In: Hutnik: vol 78. Paper presented at IV International Conference on Drawing, Zakopane, 3-5 Mars 2011 (pp. 98-100).
Open this publication in new window or tab >>Temperatures at wire-drawing: simulations and verification efforts
2011 (English)In: Hutnik: vol 78, 2011, p. 98-100Conference paper, Published paper (Other academic)
Abstract [en]

Temperatures are very important in the wire drawing process. They are hard to measure direct, but a combination of simulations and measurements can give valuable information

Keywords
Temperature, simulation, drawing process
National Category
Mechanical Engineering
Research subject
Mechanical Engineering
Identifiers
urn:nbn:se:oru:diva-24299 (URN)
Conference
IV International Conference on Drawing, Zakopane, 3-5 Mars 2011
Projects
Teknik för högre draghastighet
Available from: 2012-08-07 Created: 2012-08-07 Last updated: 2017-10-17Bibliographically approved
Sastry, K. Y., Nokleby, J. O., Hekkanen, M. & Jarl, M. (2010). Inclusion rating of clean steels: a study on role of steel cleanliness on fatigue performance of forged steel components used in marine propulsion. In: : . Paper presented at CIMAC (Conseil International des Machines a Combustion) Congress 2010, Bergen.
Open this publication in new window or tab >>Inclusion rating of clean steels: a study on role of steel cleanliness on fatigue performance of forged steel components used in marine propulsion
2010 (English)Conference paper, Oral presentation only (Other academic)
Abstract [en]

Det Norske Veritas (DNV) Maritime, Section for Machinery, is responsible for approval of machinery in ships for DNV Class. Allowable fatigue stresses in forged steel is a key input parameter for such evaluations, and are regulated in DNV’s Rules. It is well known that the cleanliness of the steel is important for its fatigue strength. To account for this, “clean steel” has been defined in DNV’s Rules for forgings. For “clean steel”, an extra 10% is allowed in the components fatigue strength, compared to ordinary forged steels. Clean steel is given a factor of 1.1. Recently, one leading steel manufacturer has claimed that even higher benefits can be gained by using “super clean steels”, and a factor 1.15 has been claimed. The improvement has been demonstrated by fatigue testing. It appears that although the claimed 125% may be justified, there are limits to how much gain it is possible to obtain by increasing steel cleanliness. In order to approve such increased fatigue strength in attempt has been made to find ways to correlate demonstrated cleanliness to increased fatigue strength by chemical and/or metallographic means without performing extensive fatigue test series. Only with such criteria, it is possible to certify “super clean steel”, and accept the use of its increased fatigue strength with reference to the material certificate. This paper covers a study concerning the methods that are available for determining the cleanliness level for steels. Examples of methods that can be used for finding and testing material for the presence of big inclusions are reported.

National Category
Mechanical Engineering
Research subject
Mechanical Engineering
Identifiers
urn:nbn:se:oru:diva-24301 (URN)
Conference
CIMAC (Conseil International des Machines a Combustion) Congress 2010, Bergen
Available from: 2012-08-07 Created: 2012-08-07 Last updated: 2018-04-24Bibliographically approved
Johansson, H. & Jarl, M. (2010). Teknik för högre draghastighet. In: Nordisk trådteknisk förening: årsmötesbok. Paper presented at Nordisk Trådteknisk Förenings Årsmöteskonferens 2010 (pp. 49-55). Hallstahammar: Nordisk trådteknisk förening (NTTF)
Open this publication in new window or tab >>Teknik för högre draghastighet
2010 (Swedish)In: Nordisk trådteknisk förening: årsmötesbok, Hallstahammar: Nordisk trådteknisk förening (NTTF) , 2010, p. 49-55Conference paper, Published paper (Other academic)
Abstract [sv]

Arbetet med projektet Teknik för högre draghastighet har inletts med studier av hur kylsystem för dragskivor är konstruerade, några försök att teoretiskt studera värmetransport i gränsytor och FEM simuleringar av temperaturen i dragskivor.

Place, publisher, year, edition, pages
Hallstahammar: Nordisk trådteknisk förening (NTTF), 2010
Series
Årsmöteskonferens / Nordisk trådteknisk förening - NTTF, ISSN 1404-6237
Keywords
Wire drawing, steel
National Category
Mechanical Engineering
Research subject
Mechanical Engineering
Identifiers
urn:nbn:se:oru:diva-24300 (URN)
Conference
Nordisk Trådteknisk Förenings Årsmöteskonferens 2010
Projects
Teknik för högre draghastighet
Available from: 2012-08-07 Created: 2012-08-07 Last updated: 2017-10-17Bibliographically approved
Jarl, M. (2009). Automatisering, mätning och styrning av kvalitetspåverkande faktorer vid tråddragning. Paper presented at Jernkontoret, programkonferens, hotel Galaxen, Borlänge, 10-11 juni 2009.
Open this publication in new window or tab >>Automatisering, mätning och styrning av kvalitetspåverkande faktorer vid tråddragning
2009 (Swedish)Conference paper, Oral presentation only (Other academic)
National Category
Engineering and Technology
Research subject
Mechanical Engineering
Identifiers
urn:nbn:se:oru:diva-8418 (URN)
Conference
Jernkontoret, programkonferens, hotel Galaxen, Borlänge, 10-11 juni 2009
Available from: 2009-10-30 Created: 2009-10-30 Last updated: 2017-10-18Bibliographically approved
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