Analysis and stiffness evaluation of a microparallel kinematic machine

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.

• Autores: Yáñez-Valdez, Ricardo
• Tipo de recurso: Article of journal
• Fecha de publicación: 2017
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/60409
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/60409; http://bdigital.unal.edu.co/58741/
• Palabra clave: 62 Ingeniería y operaciones afines / Engineering; Isotropic behavior; micromanufacturing; microparallel kinematic machine; set-up prototype; stiffness maps; Isotropía de fuerzas; mapas de rigidez; mecanismo paralelo; micromanufactura; micromáquina herramienta
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional