Sökning: "chatter"

Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet chatter.

  1. 1. Joint Interface Effects on Machining System Vibration

    Författare :Qilin Fu; Cornel-Mihai Nicolescu; Tomas Beno; KTH; []
    Nyckelord :Joint Interface; Vibration; Damping; Chatter; Machining; Carbon NanoComposite; PECVD; HiPIMS; SRA - Production; SRA - Produktion; Järnvägsgruppen - Ljud och vibrationer; Järnvägsgruppen - Ljud och vibrationer;

    Sammanfattning : Vibration problems are still the major constraint in modern machining processes that seek higher material removal rate, shorter process time, longer tool life and better product quality. Depending on the process, the weaker structure element can be the tool/tool holder, workpiece/fixture or both. LÄS MER

  3. 2. Strategies for Reducing Vibrations during Milling of Thin-walled Components

    Författare :Bertil Wanner; Cornel Mihai Nicolescu; Thomas Björk; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Milling; vibrations; chatter; stability; prediction; thin-wall; Inconel 718; Manufacturing and materials engineering;

    Sammanfattning : Factors such as environmental requirements and fuel efficiency have pushed aerospace industry to develop reduced-weight engine designs and thereby light-weight and thin-walled components. As component wall thickness gets thinner and the mechanical structures weaker, the structure becomes more sensitive for vibrations during milling operations. LÄS MER

  4. 3. On passive and active control of machining system dynamics : analysis and implementation

    Författare :Amir Rashid; Cornell Mihai Nicolescu; Drogos A. Axinte; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; machining system; chatter; productivity; palletised workholding; damping; tuned viscoelastic damper; Manufacturing engineering; Produktionsteknik;

    Sammanfattning : .... LÄS MER

  5. 4. Regenerative Chatter Vibration in Indexable Drills : Modeling and Simulation

    Författare :Amir Parsian; Tomas Beno; Mahdi Eynian; Martin Magnevall; Erhan Budak; Högskolan Väst; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sound; Vibrations; Drill; Indexable; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Sammanfattning : An indexable insert drill is a drill which uses cutting inserts to make holes. Undesirable sound generated by this type of drill has always been considered as a problem in workshops. The focus of this thesis is to investigate the mechanism behind these vibrations, to model it and to provide guidelines for reducing the sound in future drill designs. LÄS MER

  7. 5. Chatter stability of turning and milling with process damping

    Författare :Mahdi Eynian; Yusuf Altintas; Canada The University of British Columbia The Faculty of Graduate Studies (Mechanical Engineering); []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The prediction of chatter instability in machining steel and thermal-resistant alloys at low ‎cutting speeds has been difficult due to unknown process damping contributed by the ‎contact mechanism between tool flank and wavy surface finish. This thesis presents ‎modeling and measurement of process damping coefficients, and the prediction of chatter ‎stability limits for turning and milling operations at low cutting speeds. LÄS MER