Design of a 3-DOF PKM module for large structural component machining

被引：126

作者：

Li, Y. G. ^{[1
,2
]}

Liu, H. T. ^{[1
]}

Zhao, X. M. ^{[1
]}

Huang, T. ^{[1
]}

Chetwynd, Derek G. ^{[3
]}

机构：

[1] Tianjin Univ, Sch Mech Engn, Tianjin 300072, Peoples R China

[2] Tianjin Univ Technol & Educ, Tianjin 300222, Peoples R China

[3] Univ Warwick, Sch Engn, Coventry CV4 7AL, W Midlands, England

来源：

MECHANISM AND MACHINE THEORY | 2010年 / 45卷 / 06期

基金：

美国国家科学基金会;

关键词：

Parallel kinematic machines; Stiffness design; High-speed machining; KINEMATIC CHARACTERISTICS; PARALLEL MANIPULATORS;

D O I：

10.1016/j.mechmachtheory.2010.01.008

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper presents a novel 3-DOF PKM module named the A3 head that can be employed to form a 5-axis manufacturing cell for large structural component machining. The architecture behind the A3 head is a 3-RPS parallel mechanism. A semi-analytic stiffness model of the A3 head is formulated by taking into account the component compliances associated with actuations and constraints. With the dimensionless treatment of the stiffness model, a global performance index is proposed for minimization subject to a set of appropriate constraints generated as a result of in-depth discussion, leading to only one of four geometric parameters to be determined for achieving a compact, lightweight yet rigid design. Stiffness evaluation of the optimized A3 head is carried out throughout the workspace and comparisons are made with those evaluated by finite element analysis at the reference configuration. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：941 / 954

页数：14

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