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Effect of clamping conditions on the vibrational behavior of a designed-in-damped turning tool
KTH, School of Industrial Engineering and Management (ITM), Production Engineering.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Clamping conditions of a boring bar with designed in damping were altered and the effect of the alterations on the dynamic properties of the boring bar was studied. Three types of mechanisms each one having a VDI-turret-interface (Verein Deutscher Ingenieure, the Association of German Engineers) were studied. Two of the mechanisms provided hydrostatic clamping of the bar (Hydro-grip and Hydrofix) and the third was a screw clamping mechanism. Testing was made through modal analysis and machining tests which suggested that a hydrostatic clamping of the damped boring bar was optimal over screw clamping. The optimal hydrostatic clamping mechanism was found to be the Hydro-grip. The clamping torque of the Hydro-grip could be adjusted from 6 Nm to 4 Nm to reduce vibrations when machining.

Abstract [sv]

Ändringar gjordes i fastspänningen av en svarvbom och effekten ändringarna gav på svarvbommens dynamiska egenskaper studerades. Tre typer av fastspänningsmekanismer studerades, alla tre hade en VDI-(Verein Deutscher Ingenieure, the Association of German Engineers) infästning till svarvmaskinens revolver. Två av mekanismerna spände fast svarvbommen hydrostatiskt (Hydro-grip och Hydrofix) och den tredje hade skruvfastspänning för verktyget. Tester gjordes genom modal analysis och maskintester vilka gav att en hydrostatisk fastspänning var optimal för svarvbommen istället för skruvfastspänning. Den optimala hydrostatiska fastspänningstypen fanns var Hydro-grip. Om fastspänningsmomentet från hydrogripen sänktes från 6 Nm till 4 Nm så minskade vibrationerna under maskintesterna.

Place, publisher, year, edition, pages
2015. , 47 p.
, Degree Project in Production Engineering, Second Level, 644
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-170432OAI: diva2:831653
Available from: 2015-06-30 Created: 2015-06-30 Last updated: 2015-06-30Bibliographically approved

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