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Control of milling process dynamics through a mechatronic tool holder with purposely designed Joint Interface
KTH, Skolan för industriell teknik och management (ITM), Industriell produktion.ORCID-id: 0000-0003-0219-1667
KTH, Skolan för industriell teknik och management (ITM), Industriell produktion.ORCID-id: 0000-0003-0155-127X
KTH, Skolan för industriell teknik och management (ITM), Industriell produktion.ORCID-id: 0000-0002-5960-2159
2015 (engelsk)Inngår i: 2015 10th International Symposium on Mechatronics and its Applications (ISMA), Institute of Electrical and Electronics Engineers (IEEE), 2015Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Machine tool joints have significant influence on the dynamic characteristics of the machine tool and therefore on the response of the machining system to excitations from the cutting process. In cases of unstable response, generally described as chatter, surface quality of a machined workpiece and tool life deteriorate significantly. This paper presents a novel way of exploiting joints in order to control the dynamic response of the system, by integrating a mechatronic tool holder (Joint Interface Module - JIM) in the machine tool. This system has a purposely designed joint interface with controllable natural characteristics (stiffness and damping). These characteristics are controlled by altering the applied pre-load on the internal joint interface of the tool holder. The preload on the joint interface is controlled by pneumatic means. In doing so, a milling process during which the stability limit was exceeded became stable during the machining process, without alteration of the process parameters.

sted, utgiver, år, opplag, sider
Institute of Electrical and Electronics Engineers (IEEE), 2015.
Emneord [en]
Cutting, Cutting tools, Machine tools, Milling (machining), Dynamic characteristics, Internal joints, Joint interfaces, Machining Process, Machining systems, Milling process, Process parameters, Stiffness and damping
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-191765DOI: 10.1109/ISMA.2015.7373475ISI: 000380519100021Scopus ID: 2-s2.0-84964923554ISBN: 978-1-4673-7797-3 (tryckt)OAI: oai:DiVA.org:kth-191765DiVA, id: diva2:958085
Konferanse
10th International Symposium on Mechatronics and its Applications, ISMA 2015; Sharjah; United Arab Emirates; 8 December 2015 through 10 December 2015
Merknad

QC 20160906

Tilgjengelig fra: 2016-09-06 Laget: 2016-09-02 Sist oppdatert: 2017-03-28bibliografisk kontrollert
Inngår i avhandling
1. Estimation of Machining System Dynamic Properties - Measurement and Modelling
Åpne denne publikasjonen i ny fane eller vindu >>Estimation of Machining System Dynamic Properties - Measurement and Modelling
2017 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Dynamic characteristics of machining systems are analysed for improved understanding of both structural and process properties. The thesis stresses the use of testing methods under operational like conditions as these are more representative of closed loop systems, such as machining systems, as compared to conventional testing methods.

The test instrument proposed is a contactless excitation and response system, developed for testing of machine tool spindles under load and with rotating spindle. The instrument uses electromagnetic excitation and displacement sensors for analysis of rotating milling tools subject to load. A graphical tool for displaying and analysing rotor displacement was developed in conjunction with this.

A modelling procedure for both off-line and on-line estimation of dynamic properties of mechanical structure and process information is presented. The proposed auto-regressive moving average models enable calculation of operational dynamic parameters and they can be estimated in a recursive manner, thus enabling real-time monitoring. The discrimination between stable and unstable processes, both in turning and milling, was performed by analysing the damping obtained from the operational dynamic parameters.

sted, utgiver, år, opplag, sider
Stockholm: Kungliga Tekniska högskolan, 2017. s. 57
Serie
TRITA-IIP, ISSN 1650-1888 ; 17-02
Emneord
Machining system, Operational dynamic parameters, Displacement map, Contactless excitation and response system
HSV kategori
Forskningsprogram
SRA - Produktion; Industriell produktion
Identifikatorer
urn:nbn:se:kth:diva-204579 (URN)978-91-7729-323-1 (ISBN)
Disputas
2017-04-28, F3, Lindstedtsvägen 26, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Forskningsfinansiär
VINNOVA
Merknad

QC 20170330

Tilgjengelig fra: 2017-03-30 Laget: 2017-03-28 Sist oppdatert: 2017-03-30bibliografisk kontrollert

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