Abstract

YANEZ-VALDEZ, Ricardo. Analysis and stiffness evaluation of a microparallel kinematic machine. Dyna rev.fac.nac.minas [online]. 2017, vol.84, n.201, pp.224-233. ISSN 0012-7353.  https://doi.org/10.15446/dyna.v84n201.61060.

This study explores a scaled version of a 3-PRRR parallel configuration that can be used in micro-machining tasks. The study addresses a stiffness model of a micro-parallel kinematic machine (mPKM) by employing an approach involving kinematic and static equations. The objective of the model includes providing an understanding of the manner in which the stiffness of a mechanism changes as a function of both the position of an end-effector and the estimated cutting forces that are generated by micro-machining operations. An experimental prototype is considered for the preliminary validation. Three work planes and three cutting directions into the workspace are evaluated by iso-stiffness mapping. The results indicate that the mPKM operates with high stiffness performances in static operations. This is useful for suitable improvements in the prototype and developing analytical design criteria.

Keywords : Isotropic behavior; micromanufacturing; microparallel kinematic machine; set-up prototype; stiffness maps.

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